| /* |
| * This file is part of the Chelsio T6 Crypto driver for Linux. |
| * |
| * Copyright (c) 2003-2016 Chelsio Communications, Inc. All rights reserved. |
| * |
| * This software is available to you under a choice of one of two |
| * licenses. You may choose to be licensed under the terms of the GNU |
| * General Public License (GPL) Version 2, available from the file |
| * COPYING in the main directory of this source tree, or the |
| * OpenIB.org BSD license below: |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| * |
| * Written and Maintained by: |
| * Manoj Malviya (manojmalviya@chelsio.com) |
| * Atul Gupta (atul.gupta@chelsio.com) |
| * Jitendra Lulla (jlulla@chelsio.com) |
| * Yeshaswi M R Gowda (yeshaswi@chelsio.com) |
| * Harsh Jain (harsh@chelsio.com) |
| */ |
| |
| #define pr_fmt(fmt) "chcr:" fmt |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/crypto.h> |
| #include <linux/cryptohash.h> |
| #include <linux/skbuff.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/highmem.h> |
| #include <linux/scatterlist.h> |
| |
| #include <crypto/aes.h> |
| #include <crypto/algapi.h> |
| #include <crypto/hash.h> |
| #include <crypto/sha.h> |
| #include <crypto/authenc.h> |
| #include <crypto/ctr.h> |
| #include <crypto/gf128mul.h> |
| #include <crypto/internal/aead.h> |
| #include <crypto/null.h> |
| #include <crypto/internal/skcipher.h> |
| #include <crypto/aead.h> |
| #include <crypto/scatterwalk.h> |
| #include <crypto/internal/hash.h> |
| |
| #include "t4fw_api.h" |
| #include "t4_msg.h" |
| #include "chcr_core.h" |
| #include "chcr_algo.h" |
| #include "chcr_crypto.h" |
| |
| static inline struct chcr_aead_ctx *AEAD_CTX(struct chcr_context *ctx) |
| { |
| return ctx->crypto_ctx->aeadctx; |
| } |
| |
| static inline struct ablk_ctx *ABLK_CTX(struct chcr_context *ctx) |
| { |
| return ctx->crypto_ctx->ablkctx; |
| } |
| |
| static inline struct hmac_ctx *HMAC_CTX(struct chcr_context *ctx) |
| { |
| return ctx->crypto_ctx->hmacctx; |
| } |
| |
| static inline struct chcr_gcm_ctx *GCM_CTX(struct chcr_aead_ctx *gctx) |
| { |
| return gctx->ctx->gcm; |
| } |
| |
| static inline struct chcr_authenc_ctx *AUTHENC_CTX(struct chcr_aead_ctx *gctx) |
| { |
| return gctx->ctx->authenc; |
| } |
| |
| static inline struct uld_ctx *ULD_CTX(struct chcr_context *ctx) |
| { |
| return ctx->dev->u_ctx; |
| } |
| |
| static inline int is_ofld_imm(const struct sk_buff *skb) |
| { |
| return (skb->len <= CRYPTO_MAX_IMM_TX_PKT_LEN); |
| } |
| |
| /* |
| * sgl_len - calculates the size of an SGL of the given capacity |
| * @n: the number of SGL entries |
| * Calculates the number of flits needed for a scatter/gather list that |
| * can hold the given number of entries. |
| */ |
| static inline unsigned int sgl_len(unsigned int n) |
| { |
| n--; |
| return (3 * n) / 2 + (n & 1) + 2; |
| } |
| |
| static void chcr_verify_tag(struct aead_request *req, u8 *input, int *err) |
| { |
| u8 temp[SHA512_DIGEST_SIZE]; |
| struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
| int authsize = crypto_aead_authsize(tfm); |
| struct cpl_fw6_pld *fw6_pld; |
| int cmp = 0; |
| |
| fw6_pld = (struct cpl_fw6_pld *)input; |
| if ((get_aead_subtype(tfm) == CRYPTO_ALG_SUB_TYPE_AEAD_RFC4106) || |
| (get_aead_subtype(tfm) == CRYPTO_ALG_SUB_TYPE_AEAD_GCM)) { |
| cmp = crypto_memneq(&fw6_pld->data[2], (fw6_pld + 1), authsize); |
| } else { |
| |
| sg_pcopy_to_buffer(req->src, sg_nents(req->src), temp, |
| authsize, req->assoclen + |
| req->cryptlen - authsize); |
| cmp = crypto_memneq(temp, (fw6_pld + 1), authsize); |
| } |
| if (cmp) |
| *err = -EBADMSG; |
| else |
| *err = 0; |
| } |
| |
| /* |
| * chcr_handle_resp - Unmap the DMA buffers associated with the request |
| * @req: crypto request |
| */ |
| int chcr_handle_resp(struct crypto_async_request *req, unsigned char *input, |
| int err) |
| { |
| struct crypto_tfm *tfm = req->tfm; |
| struct chcr_context *ctx = crypto_tfm_ctx(tfm); |
| struct uld_ctx *u_ctx = ULD_CTX(ctx); |
| struct chcr_req_ctx ctx_req; |
| unsigned int digestsize, updated_digestsize; |
| struct adapter *adap = padap(ctx->dev); |
| |
| switch (tfm->__crt_alg->cra_flags & CRYPTO_ALG_TYPE_MASK) { |
| case CRYPTO_ALG_TYPE_AEAD: |
| ctx_req.req.aead_req = aead_request_cast(req); |
| ctx_req.ctx.reqctx = aead_request_ctx(ctx_req.req.aead_req); |
| dma_unmap_sg(&u_ctx->lldi.pdev->dev, ctx_req.ctx.reqctx->dst, |
| ctx_req.ctx.reqctx->dst_nents, DMA_FROM_DEVICE); |
| if (ctx_req.ctx.reqctx->skb) { |
| kfree_skb(ctx_req.ctx.reqctx->skb); |
| ctx_req.ctx.reqctx->skb = NULL; |
| } |
| free_new_sg(ctx_req.ctx.reqctx->newdstsg); |
| ctx_req.ctx.reqctx->newdstsg = NULL; |
| if (ctx_req.ctx.reqctx->verify == VERIFY_SW) { |
| chcr_verify_tag(ctx_req.req.aead_req, input, |
| &err); |
| ctx_req.ctx.reqctx->verify = VERIFY_HW; |
| } |
| ctx_req.req.aead_req->base.complete(req, err); |
| break; |
| |
| case CRYPTO_ALG_TYPE_ABLKCIPHER: |
| err = chcr_handle_cipher_resp(ablkcipher_request_cast(req), |
| input, err); |
| break; |
| |
| case CRYPTO_ALG_TYPE_AHASH: |
| ctx_req.req.ahash_req = ahash_request_cast(req); |
| ctx_req.ctx.ahash_ctx = |
| ahash_request_ctx(ctx_req.req.ahash_req); |
| digestsize = |
| crypto_ahash_digestsize(crypto_ahash_reqtfm( |
| ctx_req.req.ahash_req)); |
| updated_digestsize = digestsize; |
| if (digestsize == SHA224_DIGEST_SIZE) |
| updated_digestsize = SHA256_DIGEST_SIZE; |
| else if (digestsize == SHA384_DIGEST_SIZE) |
| updated_digestsize = SHA512_DIGEST_SIZE; |
| if (ctx_req.ctx.ahash_ctx->skb) { |
| kfree_skb(ctx_req.ctx.ahash_ctx->skb); |
| ctx_req.ctx.ahash_ctx->skb = NULL; |
| } |
| if (ctx_req.ctx.ahash_ctx->result == 1) { |
| ctx_req.ctx.ahash_ctx->result = 0; |
| memcpy(ctx_req.req.ahash_req->result, input + |
| sizeof(struct cpl_fw6_pld), |
| digestsize); |
| } else { |
| memcpy(ctx_req.ctx.ahash_ctx->partial_hash, input + |
| sizeof(struct cpl_fw6_pld), |
| updated_digestsize); |
| } |
| ctx_req.req.ahash_req->base.complete(req, err); |
| break; |
| } |
| atomic_inc(&adap->chcr_stats.complete); |
| return err; |
| } |
| |
| /* |
| * calc_tx_flits_ofld - calculate # of flits for an offload packet |
| * @skb: the packet |
| * Returns the number of flits needed for the given offload packet. |
| * These packets are already fully constructed and no additional headers |
| * will be added. |
| */ |
| static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb) |
| { |
| unsigned int flits, cnt; |
| |
| if (is_ofld_imm(skb)) |
| return DIV_ROUND_UP(skb->len, 8); |
| |
| flits = skb_transport_offset(skb) / 8; /* headers */ |
| cnt = skb_shinfo(skb)->nr_frags; |
| if (skb_tail_pointer(skb) != skb_transport_header(skb)) |
| cnt++; |
| return flits + sgl_len(cnt); |
| } |
| |
| static inline void get_aes_decrypt_key(unsigned char *dec_key, |
| const unsigned char *key, |
| unsigned int keylength) |
| { |
| u32 temp; |
| u32 w_ring[MAX_NK]; |
| int i, j, k; |
| u8 nr, nk; |
| |
| switch (keylength) { |
| case AES_KEYLENGTH_128BIT: |
| nk = KEYLENGTH_4BYTES; |
| nr = NUMBER_OF_ROUNDS_10; |
| break; |
| case AES_KEYLENGTH_192BIT: |
| nk = KEYLENGTH_6BYTES; |
| nr = NUMBER_OF_ROUNDS_12; |
| break; |
| case AES_KEYLENGTH_256BIT: |
| nk = KEYLENGTH_8BYTES; |
| nr = NUMBER_OF_ROUNDS_14; |
| break; |
| default: |
| return; |
| } |
| for (i = 0; i < nk; i++) |
| w_ring[i] = be32_to_cpu(*(u32 *)&key[4 * i]); |
| |
| i = 0; |
| temp = w_ring[nk - 1]; |
| while (i + nk < (nr + 1) * 4) { |
| if (!(i % nk)) { |
| /* RotWord(temp) */ |
| temp = (temp << 8) | (temp >> 24); |
| temp = aes_ks_subword(temp); |
| temp ^= round_constant[i / nk]; |
| } else if (nk == 8 && (i % 4 == 0)) { |
| temp = aes_ks_subword(temp); |
| } |
| w_ring[i % nk] ^= temp; |
| temp = w_ring[i % nk]; |
| i++; |
| } |
| i--; |
| for (k = 0, j = i % nk; k < nk; k++) { |
| *((u32 *)dec_key + k) = htonl(w_ring[j]); |
| j--; |
| if (j < 0) |
| j += nk; |
| } |
| } |
| |
| static struct crypto_shash *chcr_alloc_shash(unsigned int ds) |
| { |
| struct crypto_shash *base_hash = ERR_PTR(-EINVAL); |
| |
| switch (ds) { |
| case SHA1_DIGEST_SIZE: |
| base_hash = crypto_alloc_shash("sha1", 0, 0); |
| break; |
| case SHA224_DIGEST_SIZE: |
| base_hash = crypto_alloc_shash("sha224", 0, 0); |
| break; |
| case SHA256_DIGEST_SIZE: |
| base_hash = crypto_alloc_shash("sha256", 0, 0); |
| break; |
| case SHA384_DIGEST_SIZE: |
| base_hash = crypto_alloc_shash("sha384", 0, 0); |
| break; |
| case SHA512_DIGEST_SIZE: |
| base_hash = crypto_alloc_shash("sha512", 0, 0); |
| break; |
| } |
| |
| return base_hash; |
| } |
| |
| static int chcr_compute_partial_hash(struct shash_desc *desc, |
| char *iopad, char *result_hash, |
| int digest_size) |
| { |
| struct sha1_state sha1_st; |
| struct sha256_state sha256_st; |
| struct sha512_state sha512_st; |
| int error; |
| |
| if (digest_size == SHA1_DIGEST_SIZE) { |
| error = crypto_shash_init(desc) ?: |
| crypto_shash_update(desc, iopad, SHA1_BLOCK_SIZE) ?: |
| crypto_shash_export(desc, (void *)&sha1_st); |
| memcpy(result_hash, sha1_st.state, SHA1_DIGEST_SIZE); |
| } else if (digest_size == SHA224_DIGEST_SIZE) { |
| error = crypto_shash_init(desc) ?: |
| crypto_shash_update(desc, iopad, SHA256_BLOCK_SIZE) ?: |
| crypto_shash_export(desc, (void *)&sha256_st); |
| memcpy(result_hash, sha256_st.state, SHA256_DIGEST_SIZE); |
| |
| } else if (digest_size == SHA256_DIGEST_SIZE) { |
| error = crypto_shash_init(desc) ?: |
| crypto_shash_update(desc, iopad, SHA256_BLOCK_SIZE) ?: |
| crypto_shash_export(desc, (void *)&sha256_st); |
| memcpy(result_hash, sha256_st.state, SHA256_DIGEST_SIZE); |
| |
| } else if (digest_size == SHA384_DIGEST_SIZE) { |
| error = crypto_shash_init(desc) ?: |
| crypto_shash_update(desc, iopad, SHA512_BLOCK_SIZE) ?: |
| crypto_shash_export(desc, (void *)&sha512_st); |
| memcpy(result_hash, sha512_st.state, SHA512_DIGEST_SIZE); |
| |
| } else if (digest_size == SHA512_DIGEST_SIZE) { |
| error = crypto_shash_init(desc) ?: |
| crypto_shash_update(desc, iopad, SHA512_BLOCK_SIZE) ?: |
| crypto_shash_export(desc, (void *)&sha512_st); |
| memcpy(result_hash, sha512_st.state, SHA512_DIGEST_SIZE); |
| } else { |
| error = -EINVAL; |
| pr_err("Unknown digest size %d\n", digest_size); |
| } |
| return error; |
| } |
| |
| static void chcr_change_order(char *buf, int ds) |
| { |
| int i; |
| |
| if (ds == SHA512_DIGEST_SIZE) { |
| for (i = 0; i < (ds / sizeof(u64)); i++) |
| *((__be64 *)buf + i) = |
| cpu_to_be64(*((u64 *)buf + i)); |
| } else { |
| for (i = 0; i < (ds / sizeof(u32)); i++) |
| *((__be32 *)buf + i) = |
| cpu_to_be32(*((u32 *)buf + i)); |
| } |
| } |
| |
| static inline int is_hmac(struct crypto_tfm *tfm) |
| { |
| struct crypto_alg *alg = tfm->__crt_alg; |
| struct chcr_alg_template *chcr_crypto_alg = |
| container_of(__crypto_ahash_alg(alg), struct chcr_alg_template, |
| alg.hash); |
| if (chcr_crypto_alg->type == CRYPTO_ALG_TYPE_HMAC) |
| return 1; |
| return 0; |
| } |
| |
| static void write_phys_cpl(struct cpl_rx_phys_dsgl *phys_cpl, |
| struct scatterlist *sg, |
| struct phys_sge_parm *sg_param) |
| { |
| struct phys_sge_pairs *to; |
| unsigned int len = 0, left_size = sg_param->obsize; |
| unsigned int nents = sg_param->nents, i, j = 0; |
| |
| phys_cpl->op_to_tid = htonl(CPL_RX_PHYS_DSGL_OPCODE_V(CPL_RX_PHYS_DSGL) |
| | CPL_RX_PHYS_DSGL_ISRDMA_V(0)); |
| phys_cpl->pcirlxorder_to_noofsgentr = |
| htonl(CPL_RX_PHYS_DSGL_PCIRLXORDER_V(0) | |
| CPL_RX_PHYS_DSGL_PCINOSNOOP_V(0) | |
| CPL_RX_PHYS_DSGL_PCITPHNTENB_V(0) | |
| CPL_RX_PHYS_DSGL_PCITPHNT_V(0) | |
| CPL_RX_PHYS_DSGL_DCAID_V(0) | |
| CPL_RX_PHYS_DSGL_NOOFSGENTR_V(nents)); |
| phys_cpl->rss_hdr_int.opcode = CPL_RX_PHYS_ADDR; |
| phys_cpl->rss_hdr_int.qid = htons(sg_param->qid); |
| phys_cpl->rss_hdr_int.hash_val = 0; |
| to = (struct phys_sge_pairs *)((unsigned char *)phys_cpl + |
| sizeof(struct cpl_rx_phys_dsgl)); |
| for (i = 0; nents && left_size; to++) { |
| for (j = 0; j < 8 && nents && left_size; j++, nents--) { |
| len = min(left_size, sg_dma_len(sg)); |
| to->len[j] = htons(len); |
| to->addr[j] = cpu_to_be64(sg_dma_address(sg)); |
| left_size -= len; |
| sg = sg_next(sg); |
| } |
| } |
| } |
| |
| static inline int map_writesg_phys_cpl(struct device *dev, |
| struct cpl_rx_phys_dsgl *phys_cpl, |
| struct scatterlist *sg, |
| struct phys_sge_parm *sg_param) |
| { |
| if (!sg || !sg_param->nents) |
| return -EINVAL; |
| |
| sg_param->nents = dma_map_sg(dev, sg, sg_param->nents, DMA_FROM_DEVICE); |
| if (sg_param->nents == 0) { |
| pr_err("CHCR : DMA mapping failed\n"); |
| return -EINVAL; |
| } |
| write_phys_cpl(phys_cpl, sg, sg_param); |
| return 0; |
| } |
| |
| static inline int get_aead_subtype(struct crypto_aead *aead) |
| { |
| struct aead_alg *alg = crypto_aead_alg(aead); |
| struct chcr_alg_template *chcr_crypto_alg = |
| container_of(alg, struct chcr_alg_template, alg.aead); |
| return chcr_crypto_alg->type & CRYPTO_ALG_SUB_TYPE_MASK; |
| } |
| |
| static inline int get_cryptoalg_subtype(struct crypto_tfm *tfm) |
| { |
| struct crypto_alg *alg = tfm->__crt_alg; |
| struct chcr_alg_template *chcr_crypto_alg = |
| container_of(alg, struct chcr_alg_template, alg.crypto); |
| |
| return chcr_crypto_alg->type & CRYPTO_ALG_SUB_TYPE_MASK; |
| } |
| |
| static inline void write_buffer_to_skb(struct sk_buff *skb, |
| unsigned int *frags, |
| char *bfr, |
| u8 bfr_len) |
| { |
| skb->len += bfr_len; |
| skb->data_len += bfr_len; |
| skb->truesize += bfr_len; |
| get_page(virt_to_page(bfr)); |
| skb_fill_page_desc(skb, *frags, virt_to_page(bfr), |
| offset_in_page(bfr), bfr_len); |
| (*frags)++; |
| } |
| |
| |
| static inline void |
| write_sg_to_skb(struct sk_buff *skb, unsigned int *frags, |
| struct scatterlist *sg, unsigned int count) |
| { |
| struct page *spage; |
| unsigned int page_len; |
| |
| skb->len += count; |
| skb->data_len += count; |
| skb->truesize += count; |
| |
| while (count > 0) { |
| if (!sg || (!(sg->length))) |
| break; |
| spage = sg_page(sg); |
| get_page(spage); |
| page_len = min(sg->length, count); |
| skb_fill_page_desc(skb, *frags, spage, sg->offset, page_len); |
| (*frags)++; |
| count -= page_len; |
| sg = sg_next(sg); |
| } |
| } |
| |
| static int cxgb4_is_crypto_q_full(struct net_device *dev, unsigned int idx) |
| { |
| struct adapter *adap = netdev2adap(dev); |
| struct sge_uld_txq_info *txq_info = |
| adap->sge.uld_txq_info[CXGB4_TX_CRYPTO]; |
| struct sge_uld_txq *txq; |
| int ret = 0; |
| |
| local_bh_disable(); |
| txq = &txq_info->uldtxq[idx]; |
| spin_lock(&txq->sendq.lock); |
| if (txq->full) |
| ret = -1; |
| spin_unlock(&txq->sendq.lock); |
| local_bh_enable(); |
| return ret; |
| } |
| |
| static int generate_copy_rrkey(struct ablk_ctx *ablkctx, |
| struct _key_ctx *key_ctx) |
| { |
| if (ablkctx->ciph_mode == CHCR_SCMD_CIPHER_MODE_AES_CBC) { |
| memcpy(key_ctx->key, ablkctx->rrkey, ablkctx->enckey_len); |
| } else { |
| memcpy(key_ctx->key, |
| ablkctx->key + (ablkctx->enckey_len >> 1), |
| ablkctx->enckey_len >> 1); |
| memcpy(key_ctx->key + (ablkctx->enckey_len >> 1), |
| ablkctx->rrkey, ablkctx->enckey_len >> 1); |
| } |
| return 0; |
| } |
| static int chcr_sg_ent_in_wr(struct scatterlist *src, |
| struct scatterlist *dst, |
| unsigned int minsg, |
| unsigned int space, |
| short int *sent, |
| short int *dent) |
| { |
| int srclen = 0, dstlen = 0; |
| int srcsg = minsg, dstsg = 0; |
| |
| *sent = 0; |
| *dent = 0; |
| while (src && dst && ((srcsg + 1) <= MAX_SKB_FRAGS) && |
| space > (sgl_ent_len[srcsg + 1] + dsgl_ent_len[dstsg])) { |
| srclen += src->length; |
| srcsg++; |
| while (dst && ((dstsg + 1) <= MAX_DSGL_ENT) && |
| space > (sgl_ent_len[srcsg] + dsgl_ent_len[dstsg + 1])) { |
| if (srclen <= dstlen) |
| break; |
| dstlen += dst->length; |
| dst = sg_next(dst); |
| dstsg++; |
| } |
| src = sg_next(src); |
| } |
| *sent = srcsg - minsg; |
| *dent = dstsg; |
| return min(srclen, dstlen); |
| } |
| |
| static int chcr_cipher_fallback(struct crypto_skcipher *cipher, |
| u32 flags, |
| struct scatterlist *src, |
| struct scatterlist *dst, |
| unsigned int nbytes, |
| u8 *iv, |
| unsigned short op_type) |
| { |
| int err; |
| |
| SKCIPHER_REQUEST_ON_STACK(subreq, cipher); |
| skcipher_request_set_tfm(subreq, cipher); |
| skcipher_request_set_callback(subreq, flags, NULL, NULL); |
| skcipher_request_set_crypt(subreq, src, dst, |
| nbytes, iv); |
| |
| err = op_type ? crypto_skcipher_decrypt(subreq) : |
| crypto_skcipher_encrypt(subreq); |
| skcipher_request_zero(subreq); |
| |
| return err; |
| |
| } |
| static inline void create_wreq(struct chcr_context *ctx, |
| struct chcr_wr *chcr_req, |
| void *req, struct sk_buff *skb, |
| int kctx_len, int hash_sz, |
| int is_iv, |
| unsigned int sc_len, |
| unsigned int lcb) |
| { |
| struct uld_ctx *u_ctx = ULD_CTX(ctx); |
| int iv_loc = IV_DSGL; |
| int qid = u_ctx->lldi.rxq_ids[ctx->rx_qidx]; |
| unsigned int immdatalen = 0, nr_frags = 0; |
| |
| if (is_ofld_imm(skb)) { |
| immdatalen = skb->data_len; |
| iv_loc = IV_IMMEDIATE; |
| } else { |
| nr_frags = skb_shinfo(skb)->nr_frags; |
| } |
| |
| chcr_req->wreq.op_to_cctx_size = FILL_WR_OP_CCTX_SIZE(immdatalen, |
| ((sizeof(chcr_req->key_ctx) + kctx_len) >> 4)); |
| chcr_req->wreq.pld_size_hash_size = |
| htonl(FW_CRYPTO_LOOKASIDE_WR_PLD_SIZE_V(sgl_lengths[nr_frags]) | |
| FW_CRYPTO_LOOKASIDE_WR_HASH_SIZE_V(hash_sz)); |
| chcr_req->wreq.len16_pkd = |
| htonl(FW_CRYPTO_LOOKASIDE_WR_LEN16_V(DIV_ROUND_UP( |
| (calc_tx_flits_ofld(skb) * 8), 16))); |
| chcr_req->wreq.cookie = cpu_to_be64((uintptr_t)req); |
| chcr_req->wreq.rx_chid_to_rx_q_id = |
| FILL_WR_RX_Q_ID(ctx->dev->rx_channel_id, qid, |
| is_iv ? iv_loc : IV_NOP, !!lcb, |
| ctx->tx_qidx); |
| |
| chcr_req->ulptx.cmd_dest = FILL_ULPTX_CMD_DEST(ctx->dev->tx_channel_id, |
| qid); |
| chcr_req->ulptx.len = htonl((DIV_ROUND_UP((calc_tx_flits_ofld(skb) * 8), |
| 16) - ((sizeof(chcr_req->wreq)) >> 4))); |
| |
| chcr_req->sc_imm.cmd_more = FILL_CMD_MORE(immdatalen); |
| chcr_req->sc_imm.len = cpu_to_be32(sizeof(struct cpl_tx_sec_pdu) + |
| sizeof(chcr_req->key_ctx) + |
| kctx_len + sc_len + immdatalen); |
| } |
| |
| /** |
| * create_cipher_wr - form the WR for cipher operations |
| * @req: cipher req. |
| * @ctx: crypto driver context of the request. |
| * @qid: ingress qid where response of this WR should be received. |
| * @op_type: encryption or decryption |
| */ |
| static struct sk_buff *create_cipher_wr(struct cipher_wr_param *wrparam) |
| { |
| struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(wrparam->req); |
| struct chcr_context *ctx = crypto_ablkcipher_ctx(tfm); |
| struct uld_ctx *u_ctx = ULD_CTX(ctx); |
| struct ablk_ctx *ablkctx = ABLK_CTX(ctx); |
| struct sk_buff *skb = NULL; |
| struct chcr_wr *chcr_req; |
| struct cpl_rx_phys_dsgl *phys_cpl; |
| struct chcr_blkcipher_req_ctx *reqctx = |
| ablkcipher_request_ctx(wrparam->req); |
| struct phys_sge_parm sg_param; |
| unsigned int frags = 0, transhdr_len, phys_dsgl; |
| int error; |
| unsigned int ivsize = AES_BLOCK_SIZE, kctx_len; |
| gfp_t flags = wrparam->req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? |
| GFP_KERNEL : GFP_ATOMIC; |
| struct adapter *adap = padap(ctx->dev); |
| |
| phys_dsgl = get_space_for_phys_dsgl(reqctx->dst_nents); |
| |
| kctx_len = (DIV_ROUND_UP(ablkctx->enckey_len, 16) * 16); |
| transhdr_len = CIPHER_TRANSHDR_SIZE(kctx_len, phys_dsgl); |
| skb = alloc_skb((transhdr_len + sizeof(struct sge_opaque_hdr)), flags); |
| if (!skb) { |
| error = -ENOMEM; |
| goto err; |
| } |
| skb_reserve(skb, sizeof(struct sge_opaque_hdr)); |
| chcr_req = __skb_put_zero(skb, transhdr_len); |
| chcr_req->sec_cpl.op_ivinsrtofst = |
| FILL_SEC_CPL_OP_IVINSR(ctx->dev->rx_channel_id, 2, 1); |
| |
| chcr_req->sec_cpl.pldlen = htonl(ivsize + wrparam->bytes); |
| chcr_req->sec_cpl.aadstart_cipherstop_hi = |
| FILL_SEC_CPL_CIPHERSTOP_HI(0, 0, ivsize + 1, 0); |
| |
| chcr_req->sec_cpl.cipherstop_lo_authinsert = |
| FILL_SEC_CPL_AUTHINSERT(0, 0, 0, 0); |
| chcr_req->sec_cpl.seqno_numivs = FILL_SEC_CPL_SCMD0_SEQNO(reqctx->op, 0, |
| ablkctx->ciph_mode, |
| 0, 0, ivsize >> 1); |
| chcr_req->sec_cpl.ivgen_hdrlen = FILL_SEC_CPL_IVGEN_HDRLEN(0, 0, 0, |
| 0, 1, phys_dsgl); |
| |
| chcr_req->key_ctx.ctx_hdr = ablkctx->key_ctx_hdr; |
| if ((reqctx->op == CHCR_DECRYPT_OP) && |
| (!(get_cryptoalg_subtype(crypto_ablkcipher_tfm(tfm)) == |
| CRYPTO_ALG_SUB_TYPE_CTR)) && |
| (!(get_cryptoalg_subtype(crypto_ablkcipher_tfm(tfm)) == |
| CRYPTO_ALG_SUB_TYPE_CTR_RFC3686))) { |
| generate_copy_rrkey(ablkctx, &chcr_req->key_ctx); |
| } else { |
| if ((ablkctx->ciph_mode == CHCR_SCMD_CIPHER_MODE_AES_CBC) || |
| (ablkctx->ciph_mode == CHCR_SCMD_CIPHER_MODE_AES_CTR)) { |
| memcpy(chcr_req->key_ctx.key, ablkctx->key, |
| ablkctx->enckey_len); |
| } else { |
| memcpy(chcr_req->key_ctx.key, ablkctx->key + |
| (ablkctx->enckey_len >> 1), |
| ablkctx->enckey_len >> 1); |
| memcpy(chcr_req->key_ctx.key + |
| (ablkctx->enckey_len >> 1), |
| ablkctx->key, |
| ablkctx->enckey_len >> 1); |
| } |
| } |
| phys_cpl = (struct cpl_rx_phys_dsgl *)((u8 *)(chcr_req + 1) + kctx_len); |
| sg_param.nents = reqctx->dst_nents; |
| sg_param.obsize = wrparam->bytes; |
| sg_param.qid = wrparam->qid; |
| error = map_writesg_phys_cpl(&u_ctx->lldi.pdev->dev, phys_cpl, |
| reqctx->dst, &sg_param); |
| if (error) |
| goto map_fail1; |
| |
| skb_set_transport_header(skb, transhdr_len); |
| write_buffer_to_skb(skb, &frags, reqctx->iv, ivsize); |
| write_sg_to_skb(skb, &frags, wrparam->srcsg, wrparam->bytes); |
| atomic_inc(&adap->chcr_stats.cipher_rqst); |
| create_wreq(ctx, chcr_req, &(wrparam->req->base), skb, kctx_len, 0, 1, |
| sizeof(struct cpl_rx_phys_dsgl) + phys_dsgl, |
| ablkctx->ciph_mode == CHCR_SCMD_CIPHER_MODE_AES_CBC); |
| reqctx->skb = skb; |
| skb_get(skb); |
| return skb; |
| map_fail1: |
| kfree_skb(skb); |
| err: |
| return ERR_PTR(error); |
| } |
| |
| static inline int chcr_keyctx_ck_size(unsigned int keylen) |
| { |
| int ck_size = 0; |
| |
| if (keylen == AES_KEYSIZE_128) |
| ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_128; |
| else if (keylen == AES_KEYSIZE_192) |
| ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_192; |
| else if (keylen == AES_KEYSIZE_256) |
| ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_256; |
| else |
| ck_size = 0; |
| |
| return ck_size; |
| } |
| static int chcr_cipher_fallback_setkey(struct crypto_ablkcipher *cipher, |
| const u8 *key, |
| unsigned int keylen) |
| { |
| struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher); |
| struct chcr_context *ctx = crypto_ablkcipher_ctx(cipher); |
| struct ablk_ctx *ablkctx = ABLK_CTX(ctx); |
| int err = 0; |
| |
| crypto_skcipher_clear_flags(ablkctx->sw_cipher, CRYPTO_TFM_REQ_MASK); |
| crypto_skcipher_set_flags(ablkctx->sw_cipher, cipher->base.crt_flags & |
| CRYPTO_TFM_REQ_MASK); |
| err = crypto_skcipher_setkey(ablkctx->sw_cipher, key, keylen); |
| tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK; |
| tfm->crt_flags |= |
| crypto_skcipher_get_flags(ablkctx->sw_cipher) & |
| CRYPTO_TFM_RES_MASK; |
| return err; |
| } |
| |
| static int chcr_aes_cbc_setkey(struct crypto_ablkcipher *cipher, |
| const u8 *key, |
| unsigned int keylen) |
| { |
| struct chcr_context *ctx = crypto_ablkcipher_ctx(cipher); |
| struct ablk_ctx *ablkctx = ABLK_CTX(ctx); |
| unsigned int ck_size, context_size; |
| u16 alignment = 0; |
| int err; |
| |
| err = chcr_cipher_fallback_setkey(cipher, key, keylen); |
| if (err) |
| goto badkey_err; |
| |
| ck_size = chcr_keyctx_ck_size(keylen); |
| alignment = ck_size == CHCR_KEYCTX_CIPHER_KEY_SIZE_192 ? 8 : 0; |
| memcpy(ablkctx->key, key, keylen); |
| ablkctx->enckey_len = keylen; |
| get_aes_decrypt_key(ablkctx->rrkey, ablkctx->key, keylen << 3); |
| context_size = (KEY_CONTEXT_HDR_SALT_AND_PAD + |
| keylen + alignment) >> 4; |
| |
| ablkctx->key_ctx_hdr = FILL_KEY_CTX_HDR(ck_size, CHCR_KEYCTX_NO_KEY, |
| 0, 0, context_size); |
| ablkctx->ciph_mode = CHCR_SCMD_CIPHER_MODE_AES_CBC; |
| return 0; |
| badkey_err: |
| crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); |
| ablkctx->enckey_len = 0; |
| |
| return err; |
| } |
| |
| static int chcr_aes_ctr_setkey(struct crypto_ablkcipher *cipher, |
| const u8 *key, |
| unsigned int keylen) |
| { |
| struct chcr_context *ctx = crypto_ablkcipher_ctx(cipher); |
| struct ablk_ctx *ablkctx = ABLK_CTX(ctx); |
| unsigned int ck_size, context_size; |
| u16 alignment = 0; |
| int err; |
| |
| err = chcr_cipher_fallback_setkey(cipher, key, keylen); |
| if (err) |
| goto badkey_err; |
| ck_size = chcr_keyctx_ck_size(keylen); |
| alignment = (ck_size == CHCR_KEYCTX_CIPHER_KEY_SIZE_192) ? 8 : 0; |
| memcpy(ablkctx->key, key, keylen); |
| ablkctx->enckey_len = keylen; |
| context_size = (KEY_CONTEXT_HDR_SALT_AND_PAD + |
| keylen + alignment) >> 4; |
| |
| ablkctx->key_ctx_hdr = FILL_KEY_CTX_HDR(ck_size, CHCR_KEYCTX_NO_KEY, |
| 0, 0, context_size); |
| ablkctx->ciph_mode = CHCR_SCMD_CIPHER_MODE_AES_CTR; |
| |
| return 0; |
| badkey_err: |
| crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); |
| ablkctx->enckey_len = 0; |
| |
| return err; |
| } |
| |
| static int chcr_aes_rfc3686_setkey(struct crypto_ablkcipher *cipher, |
| const u8 *key, |
| unsigned int keylen) |
| { |
| struct chcr_context *ctx = crypto_ablkcipher_ctx(cipher); |
| struct ablk_ctx *ablkctx = ABLK_CTX(ctx); |
| unsigned int ck_size, context_size; |
| u16 alignment = 0; |
| int err; |
| |
| if (keylen < CTR_RFC3686_NONCE_SIZE) |
| return -EINVAL; |
| memcpy(ablkctx->nonce, key + (keylen - CTR_RFC3686_NONCE_SIZE), |
| CTR_RFC3686_NONCE_SIZE); |
| |
| keylen -= CTR_RFC3686_NONCE_SIZE; |
| err = chcr_cipher_fallback_setkey(cipher, key, keylen); |
| if (err) |
| goto badkey_err; |
| |
| ck_size = chcr_keyctx_ck_size(keylen); |
| alignment = (ck_size == CHCR_KEYCTX_CIPHER_KEY_SIZE_192) ? 8 : 0; |
| memcpy(ablkctx->key, key, keylen); |
| ablkctx->enckey_len = keylen; |
| context_size = (KEY_CONTEXT_HDR_SALT_AND_PAD + |
| keylen + alignment) >> 4; |
| |
| ablkctx->key_ctx_hdr = FILL_KEY_CTX_HDR(ck_size, CHCR_KEYCTX_NO_KEY, |
| 0, 0, context_size); |
| ablkctx->ciph_mode = CHCR_SCMD_CIPHER_MODE_AES_CTR; |
| |
| return 0; |
| badkey_err: |
| crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); |
| ablkctx->enckey_len = 0; |
| |
| return err; |
| } |
| static void ctr_add_iv(u8 *dstiv, u8 *srciv, u32 add) |
| { |
| unsigned int size = AES_BLOCK_SIZE; |
| __be32 *b = (__be32 *)(dstiv + size); |
| u32 c, prev; |
| |
| memcpy(dstiv, srciv, AES_BLOCK_SIZE); |
| for (; size >= 4; size -= 4) { |
| prev = be32_to_cpu(*--b); |
| c = prev + add; |
| *b = cpu_to_be32(c); |
| if (prev < c) |
| break; |
| add = 1; |
| } |
| |
| } |
| |
| static unsigned int adjust_ctr_overflow(u8 *iv, u32 bytes) |
| { |
| __be32 *b = (__be32 *)(iv + AES_BLOCK_SIZE); |
| u64 c; |
| u32 temp = be32_to_cpu(*--b); |
| |
| temp = ~temp; |
| c = (u64)temp + 1; // No of block can processed withou overflow |
| if ((bytes / AES_BLOCK_SIZE) > c) |
| bytes = c * AES_BLOCK_SIZE; |
| return bytes; |
| } |
| |
| static int chcr_update_tweak(struct ablkcipher_request *req, u8 *iv) |
| { |
| struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); |
| struct chcr_context *ctx = crypto_ablkcipher_ctx(tfm); |
| struct ablk_ctx *ablkctx = ABLK_CTX(ctx); |
| struct chcr_blkcipher_req_ctx *reqctx = ablkcipher_request_ctx(req); |
| struct crypto_cipher *cipher; |
| int ret, i; |
| u8 *key; |
| unsigned int keylen; |
| |
| cipher = ablkctx->aes_generic; |
| memcpy(iv, req->info, AES_BLOCK_SIZE); |
| |
| keylen = ablkctx->enckey_len / 2; |
| key = ablkctx->key + keylen; |
| ret = crypto_cipher_setkey(cipher, key, keylen); |
| if (ret) |
| goto out; |
| |
| crypto_cipher_encrypt_one(cipher, iv, iv); |
| for (i = 0; i < (reqctx->processed / AES_BLOCK_SIZE); i++) |
| gf128mul_x_ble((le128 *)iv, (le128 *)iv); |
| |
| crypto_cipher_decrypt_one(cipher, iv, iv); |
| out: |
| return ret; |
| } |
| |
| static int chcr_update_cipher_iv(struct ablkcipher_request *req, |
| struct cpl_fw6_pld *fw6_pld, u8 *iv) |
| { |
| struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); |
| struct chcr_blkcipher_req_ctx *reqctx = ablkcipher_request_ctx(req); |
| int subtype = get_cryptoalg_subtype(crypto_ablkcipher_tfm(tfm)); |
| int ret = 0; |
| |
| if (subtype == CRYPTO_ALG_SUB_TYPE_CTR) |
| ctr_add_iv(iv, req->info, (reqctx->processed / |
| AES_BLOCK_SIZE)); |
| else if (subtype == CRYPTO_ALG_SUB_TYPE_CTR_RFC3686) |
| *(__be32 *)(reqctx->iv + CTR_RFC3686_NONCE_SIZE + |
| CTR_RFC3686_IV_SIZE) = cpu_to_be32((reqctx->processed / |
| AES_BLOCK_SIZE) + 1); |
| else if (subtype == CRYPTO_ALG_SUB_TYPE_XTS) |
| ret = chcr_update_tweak(req, iv); |
| else if (subtype == CRYPTO_ALG_SUB_TYPE_CBC) { |
| if (reqctx->op) |
| sg_pcopy_to_buffer(req->src, sg_nents(req->src), iv, |
| 16, |
| reqctx->processed - AES_BLOCK_SIZE); |
| else |
| memcpy(iv, &fw6_pld->data[2], AES_BLOCK_SIZE); |
| } |
| |
| return ret; |
| |
| } |
| |
| /* We need separate function for final iv because in rfc3686 Initial counter |
| * starts from 1 and buffer size of iv is 8 byte only which remains constant |
| * for subsequent update requests |
| */ |
| |
| static int chcr_final_cipher_iv(struct ablkcipher_request *req, |
| struct cpl_fw6_pld *fw6_pld, u8 *iv) |
| { |
| struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); |
| struct chcr_blkcipher_req_ctx *reqctx = ablkcipher_request_ctx(req); |
| int subtype = get_cryptoalg_subtype(crypto_ablkcipher_tfm(tfm)); |
| int ret = 0; |
| |
| if (subtype == CRYPTO_ALG_SUB_TYPE_CTR) |
| ctr_add_iv(iv, req->info, (reqctx->processed / |
| AES_BLOCK_SIZE)); |
| else if (subtype == CRYPTO_ALG_SUB_TYPE_XTS) |
| ret = chcr_update_tweak(req, iv); |
| else if (subtype == CRYPTO_ALG_SUB_TYPE_CBC) { |
| if (reqctx->op) |
| sg_pcopy_to_buffer(req->src, sg_nents(req->src), iv, |
| 16, |
| reqctx->processed - AES_BLOCK_SIZE); |
| else |
| memcpy(iv, &fw6_pld->data[2], AES_BLOCK_SIZE); |
| |
| } |
| return ret; |
| |
| } |
| |
| |
| static int chcr_handle_cipher_resp(struct ablkcipher_request *req, |
| unsigned char *input, int err) |
| { |
| struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); |
| struct chcr_context *ctx = crypto_ablkcipher_ctx(tfm); |
| struct uld_ctx *u_ctx = ULD_CTX(ctx); |
| struct ablk_ctx *ablkctx = ABLK_CTX(ctx); |
| struct sk_buff *skb; |
| struct cpl_fw6_pld *fw6_pld = (struct cpl_fw6_pld *)input; |
| struct chcr_blkcipher_req_ctx *reqctx = ablkcipher_request_ctx(req); |
| struct cipher_wr_param wrparam; |
| int bytes; |
| |
| dma_unmap_sg(&u_ctx->lldi.pdev->dev, reqctx->dst, reqctx->dst_nents, |
| DMA_FROM_DEVICE); |
| |
| if (reqctx->skb) { |
| kfree_skb(reqctx->skb); |
| reqctx->skb = NULL; |
| } |
| if (err) |
| goto complete; |
| |
| if (req->nbytes == reqctx->processed) { |
| err = chcr_final_cipher_iv(req, fw6_pld, req->info); |
| goto complete; |
| } |
| |
| if (unlikely(cxgb4_is_crypto_q_full(u_ctx->lldi.ports[0], |
| ctx->tx_qidx))) { |
| if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) { |
| err = -EBUSY; |
| goto complete; |
| } |
| |
| } |
| wrparam.srcsg = scatterwalk_ffwd(reqctx->srcffwd, req->src, |
| reqctx->processed); |
| reqctx->dst = scatterwalk_ffwd(reqctx->dstffwd, reqctx->dstsg, |
| reqctx->processed); |
| if (!wrparam.srcsg || !reqctx->dst) { |
| pr_err("Input sg list length less that nbytes\n"); |
| err = -EINVAL; |
| goto complete; |
| } |
| bytes = chcr_sg_ent_in_wr(wrparam.srcsg, reqctx->dst, 1, |
| SPACE_LEFT(ablkctx->enckey_len), |
| &wrparam.snent, &reqctx->dst_nents); |
| if ((bytes + reqctx->processed) >= req->nbytes) |
| bytes = req->nbytes - reqctx->processed; |
| else |
| bytes = ROUND_16(bytes); |
| err = chcr_update_cipher_iv(req, fw6_pld, reqctx->iv); |
| if (err) |
| goto complete; |
| |
| if (unlikely(bytes == 0)) { |
| err = chcr_cipher_fallback(ablkctx->sw_cipher, |
| req->base.flags, |
| wrparam.srcsg, |
| reqctx->dst, |
| req->nbytes - reqctx->processed, |
| reqctx->iv, |
| reqctx->op); |
| goto complete; |
| } |
| |
| if (get_cryptoalg_subtype(crypto_ablkcipher_tfm(tfm)) == |
| CRYPTO_ALG_SUB_TYPE_CTR) |
| bytes = adjust_ctr_overflow(reqctx->iv, bytes); |
| reqctx->processed += bytes; |
| wrparam.qid = u_ctx->lldi.rxq_ids[ctx->rx_qidx]; |
| wrparam.req = req; |
| wrparam.bytes = bytes; |
| skb = create_cipher_wr(&wrparam); |
| if (IS_ERR(skb)) { |
| pr_err("chcr : %s : Failed to form WR. No memory\n", __func__); |
| err = PTR_ERR(skb); |
| goto complete; |
| } |
| skb->dev = u_ctx->lldi.ports[0]; |
| set_wr_txq(skb, CPL_PRIORITY_DATA, ctx->tx_qidx); |
| chcr_send_wr(skb); |
| return 0; |
| complete: |
| free_new_sg(reqctx->newdstsg); |
| reqctx->newdstsg = NULL; |
| req->base.complete(&req->base, err); |
| return err; |
| } |
| |
| static int process_cipher(struct ablkcipher_request *req, |
| unsigned short qid, |
| struct sk_buff **skb, |
| unsigned short op_type) |
| { |
| struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); |
| unsigned int ivsize = crypto_ablkcipher_ivsize(tfm); |
| struct chcr_blkcipher_req_ctx *reqctx = ablkcipher_request_ctx(req); |
| struct chcr_context *ctx = crypto_ablkcipher_ctx(tfm); |
| struct ablk_ctx *ablkctx = ABLK_CTX(ctx); |
| struct cipher_wr_param wrparam; |
| int bytes, nents, err = -EINVAL; |
| |
| reqctx->newdstsg = NULL; |
| reqctx->processed = 0; |
| if (!req->info) |
| goto error; |
| if ((ablkctx->enckey_len == 0) || (ivsize > AES_BLOCK_SIZE) || |
| (req->nbytes == 0) || |
| (req->nbytes % crypto_ablkcipher_blocksize(tfm))) { |
| pr_err("AES: Invalid value of Key Len %d nbytes %d IV Len %d\n", |
| ablkctx->enckey_len, req->nbytes, ivsize); |
| goto error; |
| } |
| wrparam.srcsg = req->src; |
| if (is_newsg(req->dst, &nents)) { |
| reqctx->newdstsg = alloc_new_sg(req->dst, nents); |
| if (IS_ERR(reqctx->newdstsg)) |
| return PTR_ERR(reqctx->newdstsg); |
| reqctx->dstsg = reqctx->newdstsg; |
| } else { |
| reqctx->dstsg = req->dst; |
| } |
| bytes = chcr_sg_ent_in_wr(wrparam.srcsg, reqctx->dstsg, MIN_CIPHER_SG, |
| SPACE_LEFT(ablkctx->enckey_len), |
| &wrparam.snent, |
| &reqctx->dst_nents); |
| if ((bytes + reqctx->processed) >= req->nbytes) |
| bytes = req->nbytes - reqctx->processed; |
| else |
| bytes = ROUND_16(bytes); |
| if (unlikely(bytes > req->nbytes)) |
| bytes = req->nbytes; |
| if (get_cryptoalg_subtype(crypto_ablkcipher_tfm(tfm)) == |
| CRYPTO_ALG_SUB_TYPE_CTR) { |
| bytes = adjust_ctr_overflow(req->info, bytes); |
| } |
| if (get_cryptoalg_subtype(crypto_ablkcipher_tfm(tfm)) == |
| CRYPTO_ALG_SUB_TYPE_CTR_RFC3686) { |
| memcpy(reqctx->iv, ablkctx->nonce, CTR_RFC3686_NONCE_SIZE); |
| memcpy(reqctx->iv + CTR_RFC3686_NONCE_SIZE, req->info, |
| CTR_RFC3686_IV_SIZE); |
| |
| /* initialize counter portion of counter block */ |
| *(__be32 *)(reqctx->iv + CTR_RFC3686_NONCE_SIZE + |
| CTR_RFC3686_IV_SIZE) = cpu_to_be32(1); |
| |
| } else { |
| |
| memcpy(reqctx->iv, req->info, ivsize); |
| } |
| if (unlikely(bytes == 0)) { |
| err = chcr_cipher_fallback(ablkctx->sw_cipher, |
| req->base.flags, |
| req->src, |
| req->dst, |
| req->nbytes, |
| req->info, |
| op_type); |
| goto error; |
| } |
| reqctx->processed = bytes; |
| reqctx->dst = reqctx->dstsg; |
| reqctx->op = op_type; |
| wrparam.qid = qid; |
| wrparam.req = req; |
| wrparam.bytes = bytes; |
| *skb = create_cipher_wr(&wrparam); |
| if (IS_ERR(*skb)) { |
| err = PTR_ERR(*skb); |
| goto error; |
| } |
| |
| return 0; |
| error: |
| free_new_sg(reqctx->newdstsg); |
| reqctx->newdstsg = NULL; |
| return err; |
| } |
| |
| static int chcr_aes_encrypt(struct ablkcipher_request *req) |
| { |
| struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); |
| struct chcr_context *ctx = crypto_ablkcipher_ctx(tfm); |
| struct sk_buff *skb = NULL; |
| int err; |
| struct uld_ctx *u_ctx = ULD_CTX(ctx); |
| |
| if (unlikely(cxgb4_is_crypto_q_full(u_ctx->lldi.ports[0], |
| ctx->tx_qidx))) { |
| if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) |
| return -EBUSY; |
| } |
| |
| err = process_cipher(req, u_ctx->lldi.rxq_ids[ctx->rx_qidx], &skb, |
| CHCR_ENCRYPT_OP); |
| if (err || !skb) |
| return err; |
| skb->dev = u_ctx->lldi.ports[0]; |
| set_wr_txq(skb, CPL_PRIORITY_DATA, ctx->tx_qidx); |
| chcr_send_wr(skb); |
| return -EINPROGRESS; |
| } |
| |
| static int chcr_aes_decrypt(struct ablkcipher_request *req) |
| { |
| struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); |
| struct chcr_context *ctx = crypto_ablkcipher_ctx(tfm); |
| struct uld_ctx *u_ctx = ULD_CTX(ctx); |
| struct sk_buff *skb = NULL; |
| int err; |
| |
| if (unlikely(cxgb4_is_crypto_q_full(u_ctx->lldi.ports[0], |
| ctx->tx_qidx))) { |
| if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) |
| return -EBUSY; |
| } |
| |
| err = process_cipher(req, u_ctx->lldi.rxq_ids[ctx->rx_qidx], &skb, |
| CHCR_DECRYPT_OP); |
| if (err || !skb) |
| return err; |
| skb->dev = u_ctx->lldi.ports[0]; |
| set_wr_txq(skb, CPL_PRIORITY_DATA, ctx->tx_qidx); |
| chcr_send_wr(skb); |
| return -EINPROGRESS; |
| } |
| |
| static int chcr_device_init(struct chcr_context *ctx) |
| { |
| struct uld_ctx *u_ctx = NULL; |
| struct adapter *adap; |
| unsigned int id; |
| int txq_perchan, txq_idx, ntxq; |
| int err = 0, rxq_perchan, rxq_idx; |
| |
| id = smp_processor_id(); |
| if (!ctx->dev) { |
| u_ctx = assign_chcr_device(); |
| if (!u_ctx) { |
| pr_err("chcr device assignment fails\n"); |
| goto out; |
| } |
| ctx->dev = u_ctx->dev; |
| adap = padap(ctx->dev); |
| ntxq = min_not_zero((unsigned int)u_ctx->lldi.nrxq, |
| adap->vres.ncrypto_fc); |
| rxq_perchan = u_ctx->lldi.nrxq / u_ctx->lldi.nchan; |
| txq_perchan = ntxq / u_ctx->lldi.nchan; |
| rxq_idx = ctx->dev->tx_channel_id * rxq_perchan; |
| rxq_idx += id % rxq_perchan; |
| txq_idx = ctx->dev->tx_channel_id * txq_perchan; |
| txq_idx += id % txq_perchan; |
| spin_lock(&ctx->dev->lock_chcr_dev); |
| ctx->rx_qidx = rxq_idx; |
| ctx->tx_qidx = txq_idx; |
| ctx->dev->tx_channel_id = !ctx->dev->tx_channel_id; |
| ctx->dev->rx_channel_id = 0; |
| spin_unlock(&ctx->dev->lock_chcr_dev); |
| } |
| out: |
| return err; |
| } |
| |
| static int chcr_cra_init(struct crypto_tfm *tfm) |
| { |
| struct crypto_alg *alg = tfm->__crt_alg; |
| struct chcr_context *ctx = crypto_tfm_ctx(tfm); |
| struct ablk_ctx *ablkctx = ABLK_CTX(ctx); |
| |
| ablkctx->sw_cipher = crypto_alloc_skcipher(alg->cra_name, 0, |
| CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK); |
| if (IS_ERR(ablkctx->sw_cipher)) { |
| pr_err("failed to allocate fallback for %s\n", alg->cra_name); |
| return PTR_ERR(ablkctx->sw_cipher); |
| } |
| |
| if (get_cryptoalg_subtype(tfm) == CRYPTO_ALG_SUB_TYPE_XTS) { |
| /* To update tweak*/ |
| ablkctx->aes_generic = crypto_alloc_cipher("aes-generic", 0, 0); |
| if (IS_ERR(ablkctx->aes_generic)) { |
| pr_err("failed to allocate aes cipher for tweak\n"); |
| return PTR_ERR(ablkctx->aes_generic); |
| } |
| } else |
| ablkctx->aes_generic = NULL; |
| |
| tfm->crt_ablkcipher.reqsize = sizeof(struct chcr_blkcipher_req_ctx); |
| return chcr_device_init(crypto_tfm_ctx(tfm)); |
| } |
| |
| static int chcr_rfc3686_init(struct crypto_tfm *tfm) |
| { |
| struct crypto_alg *alg = tfm->__crt_alg; |
| struct chcr_context *ctx = crypto_tfm_ctx(tfm); |
| struct ablk_ctx *ablkctx = ABLK_CTX(ctx); |
| |
| /*RFC3686 initialises IV counter value to 1, rfc3686(ctr(aes)) |
| * cannot be used as fallback in chcr_handle_cipher_response |
| */ |
| ablkctx->sw_cipher = crypto_alloc_skcipher("ctr(aes)", 0, |
| CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK); |
| if (IS_ERR(ablkctx->sw_cipher)) { |
| pr_err("failed to allocate fallback for %s\n", alg->cra_name); |
| return PTR_ERR(ablkctx->sw_cipher); |
| } |
| tfm->crt_ablkcipher.reqsize = sizeof(struct chcr_blkcipher_req_ctx); |
| return chcr_device_init(crypto_tfm_ctx(tfm)); |
| } |
| |
| |
| static void chcr_cra_exit(struct crypto_tfm *tfm) |
| { |
| struct chcr_context *ctx = crypto_tfm_ctx(tfm); |
| struct ablk_ctx *ablkctx = ABLK_CTX(ctx); |
| |
| crypto_free_skcipher(ablkctx->sw_cipher); |
| if (ablkctx->aes_generic) |
| crypto_free_cipher(ablkctx->aes_generic); |
| } |
| |
| static int get_alg_config(struct algo_param *params, |
| unsigned int auth_size) |
| { |
| switch (auth_size) { |
| case SHA1_DIGEST_SIZE: |
| params->mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_160; |
| params->auth_mode = CHCR_SCMD_AUTH_MODE_SHA1; |
| params->result_size = SHA1_DIGEST_SIZE; |
| break; |
| case SHA224_DIGEST_SIZE: |
| params->mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_256; |
| params->auth_mode = CHCR_SCMD_AUTH_MODE_SHA224; |
| params->result_size = SHA256_DIGEST_SIZE; |
| break; |
| case SHA256_DIGEST_SIZE: |
| params->mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_256; |
| params->auth_mode = CHCR_SCMD_AUTH_MODE_SHA256; |
| params->result_size = SHA256_DIGEST_SIZE; |
| break; |
| case SHA384_DIGEST_SIZE: |
| params->mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_512; |
| params->auth_mode = CHCR_SCMD_AUTH_MODE_SHA512_384; |
| params->result_size = SHA512_DIGEST_SIZE; |
| break; |
| case SHA512_DIGEST_SIZE: |
| params->mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_512; |
| params->auth_mode = CHCR_SCMD_AUTH_MODE_SHA512_512; |
| params->result_size = SHA512_DIGEST_SIZE; |
| break; |
| default: |
| pr_err("chcr : ERROR, unsupported digest size\n"); |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| static inline void chcr_free_shash(struct crypto_shash *base_hash) |
| { |
| crypto_free_shash(base_hash); |
| } |
| |
| /** |
| * create_hash_wr - Create hash work request |
| * @req - Cipher req base |
| */ |
| static struct sk_buff *create_hash_wr(struct ahash_request *req, |
| struct hash_wr_param *param) |
| { |
| struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(req); |
| struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); |
| struct chcr_context *ctx = crypto_tfm_ctx(crypto_ahash_tfm(tfm)); |
| struct hmac_ctx *hmacctx = HMAC_CTX(ctx); |
| struct sk_buff *skb = NULL; |
| struct chcr_wr *chcr_req; |
| unsigned int frags = 0, transhdr_len, iopad_alignment = 0; |
| unsigned int digestsize = crypto_ahash_digestsize(tfm); |
| unsigned int kctx_len = 0; |
| u8 hash_size_in_response = 0; |
| gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : |
| GFP_ATOMIC; |
| struct adapter *adap = padap(ctx->dev); |
| |
| iopad_alignment = KEYCTX_ALIGN_PAD(digestsize); |
| kctx_len = param->alg_prm.result_size + iopad_alignment; |
| if (param->opad_needed) |
| kctx_len += param->alg_prm.result_size + iopad_alignment; |
| |
| if (req_ctx->result) |
| hash_size_in_response = digestsize; |
| else |
| hash_size_in_response = param->alg_prm.result_size; |
| transhdr_len = HASH_TRANSHDR_SIZE(kctx_len); |
| skb = alloc_skb((transhdr_len + sizeof(struct sge_opaque_hdr)), flags); |
| if (!skb) |
| return skb; |
| |
| skb_reserve(skb, sizeof(struct sge_opaque_hdr)); |
| chcr_req = __skb_put_zero(skb, transhdr_len); |
| |
| chcr_req->sec_cpl.op_ivinsrtofst = |
| FILL_SEC_CPL_OP_IVINSR(ctx->dev->rx_channel_id, 2, 0); |
| chcr_req->sec_cpl.pldlen = htonl(param->bfr_len + param->sg_len); |
| |
| chcr_req->sec_cpl.aadstart_cipherstop_hi = |
| FILL_SEC_CPL_CIPHERSTOP_HI(0, 0, 0, 0); |
| chcr_req->sec_cpl.cipherstop_lo_authinsert = |
| FILL_SEC_CPL_AUTHINSERT(0, 1, 0, 0); |
| chcr_req->sec_cpl.seqno_numivs = |
| FILL_SEC_CPL_SCMD0_SEQNO(0, 0, 0, param->alg_prm.auth_mode, |
| param->opad_needed, 0); |
| |
| chcr_req->sec_cpl.ivgen_hdrlen = |
| FILL_SEC_CPL_IVGEN_HDRLEN(param->last, param->more, 0, 1, 0, 0); |
| |
| memcpy(chcr_req->key_ctx.key, req_ctx->partial_hash, |
| param->alg_prm.result_size); |
| |
| if (param->opad_needed) |
| memcpy(chcr_req->key_ctx.key + |
| ((param->alg_prm.result_size <= 32) ? 32 : |
| CHCR_HASH_MAX_DIGEST_SIZE), |
| hmacctx->opad, param->alg_prm.result_size); |
| |
| chcr_req->key_ctx.ctx_hdr = FILL_KEY_CTX_HDR(CHCR_KEYCTX_NO_KEY, |
| param->alg_prm.mk_size, 0, |
| param->opad_needed, |
| ((kctx_len + |
| sizeof(chcr_req->key_ctx)) >> 4)); |
| chcr_req->sec_cpl.scmd1 = cpu_to_be64((u64)param->scmd1); |
| |
| skb_set_transport_header(skb, transhdr_len); |
| if (param->bfr_len != 0) |
| write_buffer_to_skb(skb, &frags, req_ctx->reqbfr, |
| param->bfr_len); |
| if (param->sg_len != 0) |
| write_sg_to_skb(skb, &frags, req->src, param->sg_len); |
| atomic_inc(&adap->chcr_stats.digest_rqst); |
| create_wreq(ctx, chcr_req, &req->base, skb, kctx_len, |
| hash_size_in_response, 0, DUMMY_BYTES, 0); |
| req_ctx->skb = skb; |
| skb_get(skb); |
| return skb; |
| } |
| |
| static int chcr_ahash_update(struct ahash_request *req) |
| { |
| struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(req); |
| struct crypto_ahash *rtfm = crypto_ahash_reqtfm(req); |
| struct chcr_context *ctx = crypto_tfm_ctx(crypto_ahash_tfm(rtfm)); |
| struct uld_ctx *u_ctx = NULL; |
| struct sk_buff *skb; |
| u8 remainder = 0, bs; |
| unsigned int nbytes = req->nbytes; |
| struct hash_wr_param params; |
| |
| bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(rtfm)); |
| |
| u_ctx = ULD_CTX(ctx); |
| if (unlikely(cxgb4_is_crypto_q_full(u_ctx->lldi.ports[0], |
| ctx->tx_qidx))) { |
| if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) |
| return -EBUSY; |
| } |
| |
| if (nbytes + req_ctx->reqlen >= bs) { |
| remainder = (nbytes + req_ctx->reqlen) % bs; |
| nbytes = nbytes + req_ctx->reqlen - remainder; |
| } else { |
| sg_pcopy_to_buffer(req->src, sg_nents(req->src), req_ctx->reqbfr |
| + req_ctx->reqlen, nbytes, 0); |
| req_ctx->reqlen += nbytes; |
| return 0; |
| } |
| |
| params.opad_needed = 0; |
| params.more = 1; |
| params.last = 0; |
| params.sg_len = nbytes - req_ctx->reqlen; |
| params.bfr_len = req_ctx->reqlen; |
| params.scmd1 = 0; |
| get_alg_config(¶ms.alg_prm, crypto_ahash_digestsize(rtfm)); |
| req_ctx->result = 0; |
| req_ctx->data_len += params.sg_len + params.bfr_len; |
| skb = create_hash_wr(req, ¶ms); |
| if (!skb) |
| return -ENOMEM; |
| |
| if (remainder) { |
| u8 *temp; |
| /* Swap buffers */ |
| temp = req_ctx->reqbfr; |
| req_ctx->reqbfr = req_ctx->skbfr; |
| req_ctx->skbfr = temp; |
| sg_pcopy_to_buffer(req->src, sg_nents(req->src), |
| req_ctx->reqbfr, remainder, req->nbytes - |
| remainder); |
| } |
| req_ctx->reqlen = remainder; |
| skb->dev = u_ctx->lldi.ports[0]; |
| set_wr_txq(skb, CPL_PRIORITY_DATA, ctx->tx_qidx); |
| chcr_send_wr(skb); |
| |
| return -EINPROGRESS; |
| } |
| |
| static void create_last_hash_block(char *bfr_ptr, unsigned int bs, u64 scmd1) |
| { |
| memset(bfr_ptr, 0, bs); |
| *bfr_ptr = 0x80; |
| if (bs == 64) |
| *(__be64 *)(bfr_ptr + 56) = cpu_to_be64(scmd1 << 3); |
| else |
| *(__be64 *)(bfr_ptr + 120) = cpu_to_be64(scmd1 << 3); |
| } |
| |
| static int chcr_ahash_final(struct ahash_request *req) |
| { |
| struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(req); |
| struct crypto_ahash *rtfm = crypto_ahash_reqtfm(req); |
| struct chcr_context *ctx = crypto_tfm_ctx(crypto_ahash_tfm(rtfm)); |
| struct hash_wr_param params; |
| struct sk_buff *skb; |
| struct uld_ctx *u_ctx = NULL; |
| u8 bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(rtfm)); |
| |
| u_ctx = ULD_CTX(ctx); |
| if (is_hmac(crypto_ahash_tfm(rtfm))) |
| params.opad_needed = 1; |
| else |
| params.opad_needed = 0; |
| params.sg_len = 0; |
| get_alg_config(¶ms.alg_prm, crypto_ahash_digestsize(rtfm)); |
| req_ctx->result = 1; |
| params.bfr_len = req_ctx->reqlen; |
| req_ctx->data_len += params.bfr_len + params.sg_len; |
| if (req_ctx->reqlen == 0) { |
| create_last_hash_block(req_ctx->reqbfr, bs, req_ctx->data_len); |
| params.last = 0; |
| params.more = 1; |
| params.scmd1 = 0; |
| params.bfr_len = bs; |
| |
| } else { |
| params.scmd1 = req_ctx->data_len; |
| params.last = 1; |
| params.more = 0; |
| } |
| skb = create_hash_wr(req, ¶ms); |
| if (!skb) |
| return -ENOMEM; |
| |
| skb->dev = u_ctx->lldi.ports[0]; |
| set_wr_txq(skb, CPL_PRIORITY_DATA, ctx->tx_qidx); |
| chcr_send_wr(skb); |
| return -EINPROGRESS; |
| } |
| |
| static int chcr_ahash_finup(struct ahash_request *req) |
| { |
| struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(req); |
| struct crypto_ahash *rtfm = crypto_ahash_reqtfm(req); |
| struct chcr_context *ctx = crypto_tfm_ctx(crypto_ahash_tfm(rtfm)); |
| struct uld_ctx *u_ctx = NULL; |
| struct sk_buff *skb; |
| struct hash_wr_param params; |
| u8 bs; |
| |
| bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(rtfm)); |
| u_ctx = ULD_CTX(ctx); |
| |
| if (unlikely(cxgb4_is_crypto_q_full(u_ctx->lldi.ports[0], |
| ctx->tx_qidx))) { |
| if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) |
| return -EBUSY; |
| } |
| |
| if (is_hmac(crypto_ahash_tfm(rtfm))) |
| params.opad_needed = 1; |
| else |
| params.opad_needed = 0; |
| |
| params.sg_len = req->nbytes; |
| params.bfr_len = req_ctx->reqlen; |
| get_alg_config(¶ms.alg_prm, crypto_ahash_digestsize(rtfm)); |
| req_ctx->data_len += params.bfr_len + params.sg_len; |
| req_ctx->result = 1; |
| if ((req_ctx->reqlen + req->nbytes) == 0) { |
| create_last_hash_block(req_ctx->reqbfr, bs, req_ctx->data_len); |
| params.last = 0; |
| params.more = 1; |
| params.scmd1 = 0; |
| params.bfr_len = bs; |
| } else { |
| params.scmd1 = req_ctx->data_len; |
| params.last = 1; |
| params.more = 0; |
| } |
| |
| skb = create_hash_wr(req, ¶ms); |
| if (!skb) |
| return -ENOMEM; |
| |
| skb->dev = u_ctx->lldi.ports[0]; |
| set_wr_txq(skb, CPL_PRIORITY_DATA, ctx->tx_qidx); |
| chcr_send_wr(skb); |
| |
| return -EINPROGRESS; |
| } |
| |
| static int chcr_ahash_digest(struct ahash_request *req) |
| { |
| struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(req); |
| struct crypto_ahash *rtfm = crypto_ahash_reqtfm(req); |
| struct chcr_context *ctx = crypto_tfm_ctx(crypto_ahash_tfm(rtfm)); |
| struct uld_ctx *u_ctx = NULL; |
| struct sk_buff *skb; |
| struct hash_wr_param params; |
| u8 bs; |
| |
| rtfm->init(req); |
| bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(rtfm)); |
| |
| u_ctx = ULD_CTX(ctx); |
| if (unlikely(cxgb4_is_crypto_q_full(u_ctx->lldi.ports[0], |
| ctx->tx_qidx))) { |
| if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) |
| return -EBUSY; |
| } |
| |
| if (is_hmac(crypto_ahash_tfm(rtfm))) |
| params.opad_needed = 1; |
| else |
| params.opad_needed = 0; |
| |
| params.last = 0; |
| params.more = 0; |
| params.sg_len = req->nbytes; |
| params.bfr_len = 0; |
| params.scmd1 = 0; |
| get_alg_config(¶ms.alg_prm, crypto_ahash_digestsize(rtfm)); |
| req_ctx->result = 1; |
| req_ctx->data_len += params.bfr_len + params.sg_len; |
| |
| if (req->nbytes == 0) { |
| create_last_hash_block(req_ctx->reqbfr, bs, 0); |
| params.more = 1; |
| params.bfr_len = bs; |
| } |
| |
| skb = create_hash_wr(req, ¶ms); |
| if (!skb) |
| return -ENOMEM; |
| |
| skb->dev = u_ctx->lldi.ports[0]; |
| set_wr_txq(skb, CPL_PRIORITY_DATA, ctx->tx_qidx); |
| chcr_send_wr(skb); |
| return -EINPROGRESS; |
| } |
| |
| static int chcr_ahash_export(struct ahash_request *areq, void *out) |
| { |
| struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); |
| struct chcr_ahash_req_ctx *state = out; |
| |
| state->reqlen = req_ctx->reqlen; |
| state->data_len = req_ctx->data_len; |
| memcpy(state->bfr1, req_ctx->reqbfr, req_ctx->reqlen); |
| memcpy(state->partial_hash, req_ctx->partial_hash, |
| CHCR_HASH_MAX_DIGEST_SIZE); |
| return 0; |
| } |
| |
| static int chcr_ahash_import(struct ahash_request *areq, const void *in) |
| { |
| struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); |
| struct chcr_ahash_req_ctx *state = (struct chcr_ahash_req_ctx *)in; |
| |
| req_ctx->reqlen = state->reqlen; |
| req_ctx->data_len = state->data_len; |
| req_ctx->reqbfr = req_ctx->bfr1; |
| req_ctx->skbfr = req_ctx->bfr2; |
| memcpy(req_ctx->bfr1, state->bfr1, CHCR_HASH_MAX_BLOCK_SIZE_128); |
| memcpy(req_ctx->partial_hash, state->partial_hash, |
| CHCR_HASH_MAX_DIGEST_SIZE); |
| return 0; |
| } |
| |
| static int chcr_ahash_setkey(struct crypto_ahash *tfm, const u8 *key, |
| unsigned int keylen) |
| { |
| struct chcr_context *ctx = crypto_tfm_ctx(crypto_ahash_tfm(tfm)); |
| struct hmac_ctx *hmacctx = HMAC_CTX(ctx); |
| unsigned int digestsize = crypto_ahash_digestsize(tfm); |
| unsigned int bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm)); |
| unsigned int i, err = 0, updated_digestsize; |
| |
| SHASH_DESC_ON_STACK(shash, hmacctx->base_hash); |
| |
| /* use the key to calculate the ipad and opad. ipad will sent with the |
| * first request's data. opad will be sent with the final hash result |
| * ipad in hmacctx->ipad and opad in hmacctx->opad location |
| */ |
| shash->tfm = hmacctx->base_hash; |
| shash->flags = crypto_shash_get_flags(hmacctx->base_hash); |
| if (keylen > bs) { |
| err = crypto_shash_digest(shash, key, keylen, |
| hmacctx->ipad); |
| if (err) |
| goto out; |
| keylen = digestsize; |
| } else { |
| memcpy(hmacctx->ipad, key, keylen); |
| } |
| memset(hmacctx->ipad + keylen, 0, bs - keylen); |
| memcpy(hmacctx->opad, hmacctx->ipad, bs); |
| |
| for (i = 0; i < bs / sizeof(int); i++) { |
| *((unsigned int *)(&hmacctx->ipad) + i) ^= IPAD_DATA; |
| *((unsigned int *)(&hmacctx->opad) + i) ^= OPAD_DATA; |
| } |
| |
| updated_digestsize = digestsize; |
| if (digestsize == SHA224_DIGEST_SIZE) |
| updated_digestsize = SHA256_DIGEST_SIZE; |
| else if (digestsize == SHA384_DIGEST_SIZE) |
| updated_digestsize = SHA512_DIGEST_SIZE; |
| err = chcr_compute_partial_hash(shash, hmacctx->ipad, |
| hmacctx->ipad, digestsize); |
| if (err) |
| goto out; |
| chcr_change_order(hmacctx->ipad, updated_digestsize); |
| |
| err = chcr_compute_partial_hash(shash, hmacctx->opad, |
| hmacctx->opad, digestsize); |
| if (err) |
| goto out; |
| chcr_change_order(hmacctx->opad, updated_digestsize); |
| out: |
| return err; |
| } |
| |
| static int chcr_aes_xts_setkey(struct crypto_ablkcipher *cipher, const u8 *key, |
| unsigned int key_len) |
| { |
| struct chcr_context *ctx = crypto_ablkcipher_ctx(cipher); |
| struct ablk_ctx *ablkctx = ABLK_CTX(ctx); |
| unsigned short context_size = 0; |
| int err; |
| |
| err = chcr_cipher_fallback_setkey(cipher, key, key_len); |
| if (err) |
| goto badkey_err; |
| |
| memcpy(ablkctx->key, key, key_len); |
| ablkctx->enckey_len = key_len; |
| get_aes_decrypt_key(ablkctx->rrkey, ablkctx->key, key_len << 2); |
| context_size = (KEY_CONTEXT_HDR_SALT_AND_PAD + key_len) >> 4; |
| ablkctx->key_ctx_hdr = |
| FILL_KEY_CTX_HDR((key_len == AES_KEYSIZE_256) ? |
| CHCR_KEYCTX_CIPHER_KEY_SIZE_128 : |
| CHCR_KEYCTX_CIPHER_KEY_SIZE_256, |
| CHCR_KEYCTX_NO_KEY, 1, |
| 0, context_size); |
| ablkctx->ciph_mode = CHCR_SCMD_CIPHER_MODE_AES_XTS; |
| return 0; |
| badkey_err: |
| crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); |
| ablkctx->enckey_len = 0; |
| |
| return err; |
| } |
| |
| static int chcr_sha_init(struct ahash_request *areq) |
| { |
| struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); |
| struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq); |
| int digestsize = crypto_ahash_digestsize(tfm); |
| |
| req_ctx->data_len = 0; |
| req_ctx->reqlen = 0; |
| req_ctx->reqbfr = req_ctx->bfr1; |
| req_ctx->skbfr = req_ctx->bfr2; |
| req_ctx->skb = NULL; |
| req_ctx->result = 0; |
| copy_hash_init_values(req_ctx->partial_hash, digestsize); |
| return 0; |
| } |
| |
| static int chcr_sha_cra_init(struct crypto_tfm *tfm) |
| { |
| crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), |
| sizeof(struct chcr_ahash_req_ctx)); |
| return chcr_device_init(crypto_tfm_ctx(tfm)); |
| } |
| |
| static int chcr_hmac_init(struct ahash_request *areq) |
| { |
| struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); |
| struct crypto_ahash *rtfm = crypto_ahash_reqtfm(areq); |
| struct chcr_context *ctx = crypto_tfm_ctx(crypto_ahash_tfm(rtfm)); |
| struct hmac_ctx *hmacctx = HMAC_CTX(ctx); |
| unsigned int digestsize = crypto_ahash_digestsize(rtfm); |
| unsigned int bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(rtfm)); |
| |
| chcr_sha_init(areq); |
| req_ctx->data_len = bs; |
| if (is_hmac(crypto_ahash_tfm(rtfm))) { |
| if (digestsize == SHA224_DIGEST_SIZE) |
| memcpy(req_ctx->partial_hash, hmacctx->ipad, |
| SHA256_DIGEST_SIZE); |
| else if (digestsize == SHA384_DIGEST_SIZE) |
| memcpy(req_ctx->partial_hash, hmacctx->ipad, |
| SHA512_DIGEST_SIZE); |
| else |
| memcpy(req_ctx->partial_hash, hmacctx->ipad, |
| digestsize); |
| } |
| return 0; |
| } |
| |
| static int chcr_hmac_cra_init(struct crypto_tfm *tfm) |
| { |
| struct chcr_context *ctx = crypto_tfm_ctx(tfm); |
| struct hmac_ctx *hmacctx = HMAC_CTX(ctx); |
| unsigned int digestsize = |
| crypto_ahash_digestsize(__crypto_ahash_cast(tfm)); |
| |
| crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), |
| sizeof(struct chcr_ahash_req_ctx)); |
| hmacctx->base_hash = chcr_alloc_shash(digestsize); |
| if (IS_ERR(hmacctx->base_hash)) |
| return PTR_ERR(hmacctx->base_hash); |
| return chcr_device_init(crypto_tfm_ctx(tfm)); |
| } |
| |
| static void chcr_hmac_cra_exit(struct crypto_tfm *tfm) |
| { |
| struct chcr_context *ctx = crypto_tfm_ctx(tfm); |
| struct hmac_ctx *hmacctx = HMAC_CTX(ctx); |
| |
| if (hmacctx->base_hash) { |
| chcr_free_shash(hmacctx->base_hash); |
| hmacctx->base_hash = NULL; |
| } |
| } |
| |
| static int is_newsg(struct scatterlist *sgl, unsigned int *newents) |
| { |
| int nents = 0; |
| int ret = 0; |
| |
| while (sgl) { |
| if (sgl->length > CHCR_SG_SIZE) |
| ret = 1; |
| nents += DIV_ROUND_UP(sgl->length, CHCR_SG_SIZE); |
| sgl = sg_next(sgl); |
| } |
| *newents = nents; |
| return ret; |
| } |
| |
| static inline void free_new_sg(struct scatterlist *sgl) |
| { |
| kfree(sgl); |
| } |
| |
| static struct scatterlist *alloc_new_sg(struct scatterlist *sgl, |
| unsigned int nents) |
| { |
| struct scatterlist *newsg, *sg; |
| int i, len, processed = 0; |
| struct page *spage; |
| int offset; |
| |
| newsg = kmalloc_array(nents, sizeof(struct scatterlist), GFP_KERNEL); |
| if (!newsg) |
| return ERR_PTR(-ENOMEM); |
| sg = newsg; |
| sg_init_table(sg, nents); |
| offset = sgl->offset; |
| spage = sg_page(sgl); |
| for (i = 0; i < nents; i++) { |
| len = min_t(u32, sgl->length - processed, CHCR_SG_SIZE); |
| sg_set_page(sg, spage, len, offset); |
| processed += len; |
| offset += len; |
| if (offset >= PAGE_SIZE) { |
| offset = offset % PAGE_SIZE; |
| spage++; |
| } |
| if (processed == sgl->length) { |
| processed = 0; |
| sgl = sg_next(sgl); |
| if (!sgl) |
| break; |
| spage = sg_page(sgl); |
| offset = sgl->offset; |
| } |
| sg = sg_next(sg); |
| } |
| return newsg; |
| } |
| |
| static int chcr_copy_assoc(struct aead_request *req, |
| struct chcr_aead_ctx *ctx) |
| { |
| SKCIPHER_REQUEST_ON_STACK(skreq, ctx->null); |
| |
| skcipher_request_set_tfm(skreq, ctx->null); |
| skcipher_request_set_callback(skreq, aead_request_flags(req), |
| NULL, NULL); |
| skcipher_request_set_crypt(skreq, req->src, req->dst, req->assoclen, |
| NULL); |
| |
| return crypto_skcipher_encrypt(skreq); |
| } |
| static int chcr_aead_need_fallback(struct aead_request *req, int src_nent, |
| int aadmax, int wrlen, |
| unsigned short op_type) |
| { |
| unsigned int authsize = crypto_aead_authsize(crypto_aead_reqtfm(req)); |
| |
| if (((req->cryptlen - (op_type ? authsize : 0)) == 0) || |
| (req->assoclen > aadmax) || |
| (src_nent > MAX_SKB_FRAGS) || |
| (wrlen > MAX_WR_SIZE)) |
| return 1; |
| return 0; |
| } |
| |
| static int chcr_aead_fallback(struct aead_request *req, unsigned short op_type) |
| { |
| struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
| struct chcr_context *ctx = crypto_aead_ctx(tfm); |
| struct chcr_aead_ctx *aeadctx = AEAD_CTX(ctx); |
| struct aead_request *subreq = aead_request_ctx(req); |
| |
| aead_request_set_tfm(subreq, aeadctx->sw_cipher); |
| aead_request_set_callback(subreq, req->base.flags, |
| req->base.complete, req->base.data); |
| aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, |
| req->iv); |
| aead_request_set_ad(subreq, req->assoclen); |
| return op_type ? crypto_aead_decrypt(subreq) : |
| crypto_aead_encrypt(subreq); |
| } |
| |
| static struct sk_buff *create_authenc_wr(struct aead_request *req, |
| unsigned short qid, |
| int size, |
| unsigned short op_type) |
| { |
| struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
| struct chcr_context *ctx = crypto_aead_ctx(tfm); |
| struct uld_ctx *u_ctx = ULD_CTX(ctx); |
| struct chcr_aead_ctx *aeadctx = AEAD_CTX(ctx); |
| struct chcr_authenc_ctx *actx = AUTHENC_CTX(aeadctx); |
| struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); |
| struct sk_buff *skb = NULL; |
| struct chcr_wr *chcr_req; |
| struct cpl_rx_phys_dsgl *phys_cpl; |
| struct phys_sge_parm sg_param; |
| struct scatterlist *src; |
| unsigned int frags = 0, transhdr_len; |
| unsigned int ivsize = crypto_aead_ivsize(tfm), dst_size = 0; |
| unsigned int kctx_len = 0, nents; |
| unsigned short stop_offset = 0; |
| unsigned int assoclen = req->assoclen; |
| unsigned int authsize = crypto_aead_authsize(tfm); |
| int error = -EINVAL, src_nent; |
| int null = 0; |
| gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : |
| GFP_ATOMIC; |
| struct adapter *adap = padap(ctx->dev); |
| |
| reqctx->newdstsg = NULL; |
| dst_size = req->assoclen + req->cryptlen + (op_type ? -authsize : |
| authsize); |
| if (aeadctx->enckey_len == 0 || (req->cryptlen <= 0)) |
| goto err; |
| |
| if (op_type && req->cryptlen < crypto_aead_authsize(tfm)) |
| goto err; |
| src_nent = sg_nents_for_len(req->src, req->assoclen + req->cryptlen); |
| if (src_nent < 0) |
| goto err; |
| src = scatterwalk_ffwd(reqctx->srcffwd, req->src, req->assoclen); |
| |
| if (req->src != req->dst) { |
| error = chcr_copy_assoc(req, aeadctx); |
| if (error) |
| return ERR_PTR(error); |
| } |
| if (dst_size && is_newsg(req->dst, &nents)) { |
| reqctx->newdstsg = alloc_new_sg(req->dst, nents); |
| if (IS_ERR(reqctx->newdstsg)) |
| return ERR_CAST(reqctx->newdstsg); |
| reqctx->dst = scatterwalk_ffwd(reqctx->dstffwd, |
| reqctx->newdstsg, req->assoclen); |
| } else { |
| if (req->src == req->dst) |
| reqctx->dst = src; |
| else |
| reqctx->dst = scatterwalk_ffwd(reqctx->dstffwd, |
| req->dst, req->assoclen); |
| } |
| if (get_aead_subtype(tfm) == CRYPTO_ALG_SUB_TYPE_AEAD_NULL) { |
| null = 1; |
| assoclen = 0; |
| } |
| reqctx->dst_nents = sg_nents_for_len(reqctx->dst, req->cryptlen + |
| (op_type ? -authsize : authsize)); |
| if (reqctx->dst_nents < 0) { |
| pr_err("AUTHENC:Invalid Destination sg entries\n"); |
| error = -EINVAL; |
| goto err; |
| } |
| dst_size = get_space_for_phys_dsgl(reqctx->dst_nents); |
| kctx_len = (ntohl(KEY_CONTEXT_CTX_LEN_V(aeadctx->key_ctx_hdr)) << 4) |
| - sizeof(chcr_req->key_ctx); |
| transhdr_len = CIPHER_TRANSHDR_SIZE(kctx_len, dst_size); |
| if (chcr_aead_need_fallback(req, src_nent + MIN_AUTH_SG, |
| T6_MAX_AAD_SIZE, |
| transhdr_len + (sgl_len(src_nent + MIN_AUTH_SG) * 8), |
| op_type)) { |
| atomic_inc(&adap->chcr_stats.fallback); |
| free_new_sg(reqctx->newdstsg); |
| reqctx->newdstsg = NULL; |
| return ERR_PTR(chcr_aead_fallback(req, op_type)); |
| } |
| skb = alloc_skb((transhdr_len + sizeof(struct sge_opaque_hdr)), flags); |
| if (!skb) { |
| error = -ENOMEM; |
| goto err; |
| } |
| |
| /* LLD is going to write the sge hdr. */ |
| skb_reserve(skb, sizeof(struct sge_opaque_hdr)); |
| |
| /* Write WR */ |
| chcr_req = __skb_put_zero(skb, transhdr_len); |
| |
| stop_offset = (op_type == CHCR_ENCRYPT_OP) ? 0 : authsize; |
| |
| /* |
| * Input order is AAD,IV and Payload. where IV should be included as |
| * the part of authdata. All other fields should be filled according |
| * to the hardware spec |
| */ |
| chcr_req->sec_cpl.op_ivinsrtofst = |
| FILL_SEC_CPL_OP_IVINSR(ctx->dev->rx_channel_id, 2, |
| (ivsize ? (assoclen + 1) : 0)); |
| chcr_req->sec_cpl.pldlen = htonl(assoclen + ivsize + req->cryptlen); |
| chcr_req->sec_cpl.aadstart_cipherstop_hi = FILL_SEC_CPL_CIPHERSTOP_HI( |
| assoclen ? 1 : 0, assoclen, |
| assoclen + ivsize + 1, |
| (stop_offset & 0x1F0) >> 4); |
| chcr_req->sec_cpl.cipherstop_lo_authinsert = FILL_SEC_CPL_AUTHINSERT( |
| stop_offset & 0xF, |
| null ? 0 : assoclen + ivsize + 1, |
| stop_offset, stop_offset); |
| chcr_req->sec_cpl.seqno_numivs = FILL_SEC_CPL_SCMD0_SEQNO(op_type, |
| (op_type == CHCR_ENCRYPT_OP) ? 1 : 0, |
| CHCR_SCMD_CIPHER_MODE_AES_CBC, |
| actx->auth_mode, aeadctx->hmac_ctrl, |
| ivsize >> 1); |
| chcr_req->sec_cpl.ivgen_hdrlen = FILL_SEC_CPL_IVGEN_HDRLEN(0, 0, 1, |
| 0, 1, dst_size); |
| |
| chcr_req->key_ctx.ctx_hdr = aeadctx->key_ctx_hdr; |
| if (op_type == CHCR_ENCRYPT_OP) |
| memcpy(chcr_req->key_ctx.key, aeadctx->key, |
| aeadctx->enckey_len); |
| else |
| memcpy(chcr_req->key_ctx.key, actx->dec_rrkey, |
| aeadctx->enckey_len); |
| |
| memcpy(chcr_req->key_ctx.key + (DIV_ROUND_UP(aeadctx->enckey_len, 16) << |
| 4), actx->h_iopad, kctx_len - |
| (DIV_ROUND_UP(aeadctx->enckey_len, 16) << 4)); |
| |
| phys_cpl = (struct cpl_rx_phys_dsgl *)((u8 *)(chcr_req + 1) + kctx_len); |
| sg_param.nents = reqctx->dst_nents; |
| sg_param.obsize = req->cryptlen + (op_type ? -authsize : authsize); |
| sg_param.qid = qid; |
| error = map_writesg_phys_cpl(&u_ctx->lldi.pdev->dev, phys_cpl, |
| reqctx->dst, &sg_param); |
| if (error) |
| goto dstmap_fail; |
| |
| skb_set_transport_header(skb, transhdr_len); |
| |
| if (assoclen) { |
| /* AAD buffer in */ |
| write_sg_to_skb(skb, &frags, req->src, assoclen); |
| |
| } |
| write_buffer_to_skb(skb, &frags, req->iv, ivsize); |
| write_sg_to_skb(skb, &frags, src, req->cryptlen); |
| atomic_inc(&adap->chcr_stats.cipher_rqst); |
| create_wreq(ctx, chcr_req, &req->base, skb, kctx_len, size, 1, |
| sizeof(struct cpl_rx_phys_dsgl) + dst_size, 0); |
| reqctx->skb = skb; |
| skb_get(skb); |
| |
| return skb; |
| dstmap_fail: |
| /* ivmap_fail: */ |
| kfree_skb(skb); |
| err: |
| free_new_sg(reqctx->newdstsg); |
| reqctx->newdstsg = NULL; |
| return ERR_PTR(error); |
| } |
| |
| static int set_msg_len(u8 *block, unsigned int msglen, int csize) |
| { |
| __be32 data; |
| |
| memset(block, 0, csize); |
| block += csize; |
| |
| if (csize >= 4) |
| csize = 4; |
| else if (msglen > (unsigned int)(1 << (8 * csize))) |
| return -EOVERFLOW; |
| |
| data = cpu_to_be32(msglen); |
| memcpy(block - csize, (u8 *)&data + 4 - csize, csize); |
| |
| return 0; |
| } |
| |
| static void generate_b0(struct aead_request *req, |
| struct chcr_aead_ctx *aeadctx, |
| unsigned short op_type) |
| { |
| unsigned int l, lp, m; |
| int rc; |
| struct crypto_aead *aead = crypto_aead_reqtfm(req); |
| struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); |
| u8 *b0 = reqctx->scratch_pad; |
| |
| m = crypto_aead_authsize(aead); |
| |
| memcpy(b0, reqctx->iv, 16); |
| |
| lp = b0[0]; |
| l = lp + 1; |
| |
| /* set m, bits 3-5 */ |
| *b0 |= (8 * ((m - 2) / 2)); |
| |
| /* set adata, bit 6, if associated data is used */ |
| if (req->assoclen) |
| *b0 |= 64; |
| rc = set_msg_len(b0 + 16 - l, |
| (op_type == CHCR_DECRYPT_OP) ? |
| req->cryptlen - m : req->cryptlen, l); |
| } |
| |
| static inline int crypto_ccm_check_iv(const u8 *iv) |
| { |
| /* 2 <= L <= 8, so 1 <= L' <= 7. */ |
| if (iv[0] < 1 || iv[0] > 7) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static int ccm_format_packet(struct aead_request *req, |
| struct chcr_aead_ctx *aeadctx, |
| unsigned int sub_type, |
| unsigned short op_type) |
| { |
| struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); |
| int rc = 0; |
| |
| if (sub_type == CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309) { |
| reqctx->iv[0] = 3; |
| memcpy(reqctx->iv + 1, &aeadctx->salt[0], 3); |
| memcpy(reqctx->iv + 4, req->iv, 8); |
| memset(reqctx->iv + 12, 0, 4); |
| *((unsigned short *)(reqctx->scratch_pad + 16)) = |
| htons(req->assoclen - 8); |
| } else { |
| memcpy(reqctx->iv, req->iv, 16); |
| *((unsigned short *)(reqctx->scratch_pad + 16)) = |
| htons(req->assoclen); |
| } |
| generate_b0(req, aeadctx, op_type); |
| /* zero the ctr value */ |
| memset(reqctx->iv + 15 - reqctx->iv[0], 0, reqctx->iv[0] + 1); |
| return rc; |
| } |
| |
| static void fill_sec_cpl_for_aead(struct cpl_tx_sec_pdu *sec_cpl, |
| unsigned int dst_size, |
| struct aead_request *req, |
| unsigned short op_type, |
| struct chcr_context *chcrctx) |
| { |
| struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
| struct chcr_aead_ctx *aeadctx = AEAD_CTX(crypto_aead_ctx(tfm)); |
| unsigned int ivsize = AES_BLOCK_SIZE; |
| unsigned int cipher_mode = CHCR_SCMD_CIPHER_MODE_AES_CCM; |
| unsigned int mac_mode = CHCR_SCMD_AUTH_MODE_CBCMAC; |
| unsigned int c_id = chcrctx->dev->rx_channel_id; |
| unsigned int ccm_xtra; |
| unsigned char tag_offset = 0, auth_offset = 0; |
| unsigned int assoclen; |
| |
| if (get_aead_subtype(tfm) == CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309) |
| assoclen = req->assoclen - 8; |
| else |
| assoclen = req->assoclen; |
| ccm_xtra = CCM_B0_SIZE + |
| ((assoclen) ? CCM_AAD_FIELD_SIZE : 0); |
| |
| auth_offset = req->cryptlen ? |
| (assoclen + ivsize + 1 + ccm_xtra) : 0; |
| if (op_type == CHCR_DECRYPT_OP) { |
| if (crypto_aead_authsize(tfm) != req->cryptlen) |
| tag_offset = crypto_aead_authsize(tfm); |
| else |
| auth_offset = 0; |
| } |
| |
| |
| sec_cpl->op_ivinsrtofst = FILL_SEC_CPL_OP_IVINSR(c_id, |
| 2, (ivsize ? (assoclen + 1) : 0) + |
| ccm_xtra); |
| sec_cpl->pldlen = |
| htonl(assoclen + ivsize + req->cryptlen + ccm_xtra); |
| /* For CCM there wil be b0 always. So AAD start will be 1 always */ |
| sec_cpl->aadstart_cipherstop_hi = FILL_SEC_CPL_CIPHERSTOP_HI( |
| 1, assoclen + ccm_xtra, assoclen |
| + ivsize + 1 + ccm_xtra, 0); |
| |
| sec_cpl->cipherstop_lo_authinsert = FILL_SEC_CPL_AUTHINSERT(0, |
| auth_offset, tag_offset, |
| (op_type == CHCR_ENCRYPT_OP) ? 0 : |
| crypto_aead_authsize(tfm)); |
| sec_cpl->seqno_numivs = FILL_SEC_CPL_SCMD0_SEQNO(op_type, |
| (op_type == CHCR_ENCRYPT_OP) ? 0 : 1, |
| cipher_mode, mac_mode, |
| aeadctx->hmac_ctrl, ivsize >> 1); |
| |
| sec_cpl->ivgen_hdrlen = FILL_SEC_CPL_IVGEN_HDRLEN(0, 0, 1, 0, |
| 1, dst_size); |
| } |
| |
| int aead_ccm_validate_input(unsigned short op_type, |
| struct aead_request *req, |
| struct chcr_aead_ctx *aeadctx, |
| unsigned int sub_type) |
| { |
| if (sub_type != CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309) { |
| if (crypto_ccm_check_iv(req->iv)) { |
| pr_err("CCM: IV check fails\n"); |
| return -EINVAL; |
| } |
| } else { |
| if (req->assoclen != 16 && req->assoclen != 20) { |
| pr_err("RFC4309: Invalid AAD length %d\n", |
| req->assoclen); |
| return -EINVAL; |
| } |
| } |
| if (aeadctx->enckey_len == 0) { |
| pr_err("CCM: Encryption key not set\n"); |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| unsigned int fill_aead_req_fields(struct sk_buff *skb, |
| struct aead_request *req, |
| struct scatterlist *src, |
| unsigned int ivsize, |
| struct chcr_aead_ctx *aeadctx) |
| { |
| unsigned int frags = 0; |
| struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
| struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); |
| /* b0 and aad length(if available) */ |
| |
| write_buffer_to_skb(skb, &frags, reqctx->scratch_pad, CCM_B0_SIZE + |
| (req->assoclen ? CCM_AAD_FIELD_SIZE : 0)); |
| if (req->assoclen) { |
| if (get_aead_subtype(tfm) == CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309) |
| write_sg_to_skb(skb, &frags, req->src, |
| req->assoclen - 8); |
| else |
| write_sg_to_skb(skb, &frags, req->src, req->assoclen); |
| } |
| write_buffer_to_skb(skb, &frags, reqctx->iv, ivsize); |
| if (req->cryptlen) |
| write_sg_to_skb(skb, &frags, src, req->cryptlen); |
| |
| return frags; |
| } |
| |
| static struct sk_buff *create_aead_ccm_wr(struct aead_request *req, |
| unsigned short qid, |
| int size, |
| unsigned short op_type) |
| { |
| struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
| struct chcr_context *ctx = crypto_aead_ctx(tfm); |
| struct uld_ctx *u_ctx = ULD_CTX(ctx); |
| struct chcr_aead_ctx *aeadctx = AEAD_CTX(ctx); |
| struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); |
| struct sk_buff *skb = NULL; |
| struct chcr_wr *chcr_req; |
| struct cpl_rx_phys_dsgl *phys_cpl; |
| struct phys_sge_parm sg_param; |
| struct scatterlist *src; |
| unsigned int frags = 0, transhdr_len, ivsize = AES_BLOCK_SIZE; |
| unsigned int dst_size = 0, kctx_len, nents; |
| unsigned int sub_type; |
| unsigned int authsize = crypto_aead_authsize(tfm); |
| int error = -EINVAL, src_nent; |
| gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : |
| GFP_ATOMIC; |
| struct adapter *adap = padap(ctx->dev); |
| |
| dst_size = req->assoclen + req->cryptlen + (op_type ? -authsize : |
| authsize); |
| reqctx->newdstsg = NULL; |
| if (op_type && req->cryptlen < crypto_aead_authsize(tfm)) |
| goto err; |
| src_nent = sg_nents_for_len(req->src, req->assoclen + req->cryptlen); |
| if (src_nent < 0) |
| goto err; |
| |
| sub_type = get_aead_subtype(tfm); |
| src = scatterwalk_ffwd(reqctx->srcffwd, req->src, req->assoclen); |
| if (req->src != req->dst) { |
| error = chcr_copy_assoc(req, aeadctx); |
| if (error) { |
| pr_err("AAD copy to destination buffer fails\n"); |
| return ERR_PTR(error); |
| } |
| } |
| if (dst_size && is_newsg(req->dst, &nents)) { |
| reqctx->newdstsg = alloc_new_sg(req->dst, nents); |
| if (IS_ERR(reqctx->newdstsg)) |
| return ERR_CAST(reqctx->newdstsg); |
| reqctx->dst = scatterwalk_ffwd(reqctx->dstffwd, |
| reqctx->newdstsg, req->assoclen); |
| } else { |
| if (req->src == req->dst) |
| reqctx->dst = src; |
| else |
| reqctx->dst = scatterwalk_ffwd(reqctx->dstffwd, |
| req->dst, req->assoclen); |
| } |
| reqctx->dst_nents = sg_nents_for_len(reqctx->dst, req->cryptlen + |
| (op_type ? -authsize : authsize)); |
| if (reqctx->dst_nents < 0) { |
| pr_err("CCM:Invalid Destination sg entries\n"); |
| error = -EINVAL; |
| goto err; |
| } |
| error = aead_ccm_validate_input(op_type, req, aeadctx, sub_type); |
| if (error) |
| goto err; |
| |
| dst_size = get_space_for_phys_dsgl(reqctx->dst_nents); |
| kctx_len = ((DIV_ROUND_UP(aeadctx->enckey_len, 16)) << 4) * 2; |
| transhdr_len = CIPHER_TRANSHDR_SIZE(kctx_len, dst_size); |
| if (chcr_aead_need_fallback(req, src_nent + MIN_CCM_SG, |
| T6_MAX_AAD_SIZE - 18, |
| transhdr_len + (sgl_len(src_nent + MIN_CCM_SG) * 8), |
| op_type)) { |
| atomic_inc(&adap->chcr_stats.fallback); |
| free_new_sg(reqctx->newdstsg); |
| reqctx->newdstsg = NULL; |
| return ERR_PTR(chcr_aead_fallback(req, op_type)); |
| } |
| |
| skb = alloc_skb((transhdr_len + sizeof(struct sge_opaque_hdr)), flags); |
| |
| if (!skb) { |
| error = -ENOMEM; |
| goto err; |
| } |
| |
| skb_reserve(skb, sizeof(struct sge_opaque_hdr)); |
| |
| chcr_req = __skb_put_zero(skb, transhdr_len); |
| |
| fill_sec_cpl_for_aead(&chcr_req->sec_cpl, dst_size, req, op_type, ctx); |
| |
| chcr_req->key_ctx.ctx_hdr = aeadctx->key_ctx_hdr; |
| memcpy(chcr_req->key_ctx.key, aeadctx->key, aeadctx->enckey_len); |
| memcpy(chcr_req->key_ctx.key + (DIV_ROUND_UP(aeadctx->enckey_len, 16) * |
| 16), aeadctx->key, aeadctx->enckey_len); |
| |
| phys_cpl = (struct cpl_rx_phys_dsgl *)((u8 *)(chcr_req + 1) + kctx_len); |
| error = ccm_format_packet(req, aeadctx, sub_type, op_type); |
| if (error) |
| goto dstmap_fail; |
| |
| sg_param.nents = reqctx->dst_nents; |
| sg_param.obsize = req->cryptlen + (op_type ? -authsize : authsize); |
| sg_param.qid = qid; |
| error = map_writesg_phys_cpl(&u_ctx->lldi.pdev->dev, phys_cpl, |
| reqctx->dst, &sg_param); |
| if (error) |
| goto dstmap_fail; |
| |
| skb_set_transport_header(skb, transhdr_len); |
| frags = fill_aead_req_fields(skb, req, src, ivsize, aeadctx); |
| atomic_inc(&adap->chcr_stats.aead_rqst); |
| create_wreq(ctx, chcr_req, &req->base, skb, kctx_len, 0, 1, |
| sizeof(struct cpl_rx_phys_dsgl) + dst_size, 0); |
| reqctx->skb = skb; |
| skb_get(skb); |
| return skb; |
| dstmap_fail: |
| kfree_skb(skb); |
| err: |
| free_new_sg(reqctx->newdstsg); |
| reqctx->newdstsg = NULL; |
| return ERR_PTR(error); |
| } |
| |
| static struct sk_buff *create_gcm_wr(struct aead_request *req, |
| unsigned short qid, |
| int size, |
| unsigned short op_type) |
| { |
| struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
| struct chcr_context *ctx = crypto_aead_ctx(tfm); |
| struct uld_ctx *u_ctx = ULD_CTX(ctx); |
| struct chcr_aead_ctx *aeadctx = AEAD_CTX(ctx); |
| struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); |
| struct sk_buff *skb = NULL; |
| struct chcr_wr *chcr_req; |
| struct cpl_rx_phys_dsgl *phys_cpl; |
| struct phys_sge_parm sg_param; |
| struct scatterlist *src; |
| unsigned int frags = 0, transhdr_len; |
| unsigned int ivsize = AES_BLOCK_SIZE; |
| unsigned int dst_size = 0, kctx_len, nents, assoclen = req->assoclen; |
| unsigned char tag_offset = 0; |
| unsigned int authsize = crypto_aead_authsize(tfm); |
| int error = -EINVAL, src_nent; |
| gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : |
| GFP_ATOMIC; |
| struct adapter *adap = padap(ctx->dev); |
| |
| reqctx->newdstsg = NULL; |
| dst_size = assoclen + req->cryptlen + (op_type ? -authsize : |
| authsize); |
| /* validate key size */ |
| if (aeadctx->enckey_len == 0) |
| goto err; |
| |
| if (op_type && req->cryptlen < crypto_aead_authsize(tfm)) |
| goto err; |
| src_nent = sg_nents_for_len(req->src, assoclen + req->cryptlen); |
| if (src_nent < 0) |
| goto err; |
| |
| src = scatterwalk_ffwd(reqctx->srcffwd, req->src, assoclen); |
| if (req->src != req->dst) { |
| error = chcr_copy_assoc(req, aeadctx); |
| if (error) |
| return ERR_PTR(error); |
| } |
| |
| if (dst_size && is_newsg(req->dst, &nents)) { |
| reqctx->newdstsg = alloc_new_sg(req->dst, nents); |
| if (IS_ERR(reqctx->newdstsg)) |
| return ERR_CAST(reqctx->newdstsg); |
| reqctx->dst = scatterwalk_ffwd(reqctx->dstffwd, |
| reqctx->newdstsg, assoclen); |
| } else { |
| if (req->src == req->dst) |
| reqctx->dst = src; |
| else |
| reqctx->dst = scatterwalk_ffwd(reqctx->dstffwd, |
| req->dst, assoclen); |
| } |
| |
| reqctx->dst_nents = sg_nents_for_len(reqctx->dst, req->cryptlen + |
| (op_type ? -authsize : authsize)); |
| if (reqctx->dst_nents < 0) { |
| pr_err("GCM:Invalid Destination sg entries\n"); |
| error = -EINVAL; |
| goto err; |
| } |
| |
| |
| dst_size = get_space_for_phys_dsgl(reqctx->dst_nents); |
| kctx_len = ((DIV_ROUND_UP(aeadctx->enckey_len, 16)) << 4) + |
| AEAD_H_SIZE; |
| transhdr_len = CIPHER_TRANSHDR_SIZE(kctx_len, dst_size); |
| if (chcr_aead_need_fallback(req, src_nent + MIN_GCM_SG, |
| T6_MAX_AAD_SIZE, |
| transhdr_len + (sgl_len(src_nent + MIN_GCM_SG) * 8), |
| op_type)) { |
| atomic_inc(&adap->chcr_stats.fallback); |
| free_new_sg(reqctx->newdstsg); |
| reqctx->newdstsg = NULL; |
| return ERR_PTR(chcr_aead_fallback(req, op_type)); |
| } |
| skb = alloc_skb((transhdr_len + sizeof(struct sge_opaque_hdr)), flags); |
| if (!skb) { |
| error = -ENOMEM; |
| goto err; |
| } |
| |
| /* NIC driver is going to write the sge hdr. */ |
| skb_reserve(skb, sizeof(struct sge_opaque_hdr)); |
| |
| chcr_req = __skb_put_zero(skb, transhdr_len); |
| |
| if (get_aead_subtype(tfm) == CRYPTO_ALG_SUB_TYPE_AEAD_RFC4106) |
| assoclen = req->assoclen - 8; |
| |
| tag_offset = (op_type == CHCR_ENCRYPT_OP) ? 0 : authsize; |
| chcr_req->sec_cpl.op_ivinsrtofst = FILL_SEC_CPL_OP_IVINSR( |
| ctx->dev->rx_channel_id, 2, (ivsize ? |
| (assoclen + 1) : 0)); |
| chcr_req->sec_cpl.pldlen = |
| htonl(assoclen + ivsize + req->cryptlen); |
| chcr_req->sec_cpl.aadstart_cipherstop_hi = FILL_SEC_CPL_CIPHERSTOP_HI( |
| assoclen ? 1 : 0, assoclen, |
| assoclen + ivsize + 1, 0); |
| chcr_req->sec_cpl.cipherstop_lo_authinsert = |
| FILL_SEC_CPL_AUTHINSERT(0, assoclen + ivsize + 1, |
| tag_offset, tag_offset); |
| chcr_req->sec_cpl.seqno_numivs = |
| FILL_SEC_CPL_SCMD0_SEQNO(op_type, (op_type == |
| CHCR_ENCRYPT_OP) ? 1 : 0, |
| CHCR_SCMD_CIPHER_MODE_AES_GCM, |
| CHCR_SCMD_AUTH_MODE_GHASH, |
| aeadctx->hmac_ctrl, ivsize >> 1); |
| chcr_req->sec_cpl.ivgen_hdrlen = FILL_SEC_CPL_IVGEN_HDRLEN(0, 0, 1, |
| 0, 1, dst_size); |
| chcr_req->key_ctx.ctx_hdr = aeadctx->key_ctx_hdr; |
| memcpy(chcr_req->key_ctx.key, aeadctx->key, aeadctx->enckey_len); |
| memcpy(chcr_req->key_ctx.key + (DIV_ROUND_UP(aeadctx->enckey_len, 16) * |
| 16), GCM_CTX(aeadctx)->ghash_h, AEAD_H_SIZE); |
| |
| /* prepare a 16 byte iv */ |
| /* S A L T | IV | 0x00000001 */ |
| if (get_aead_subtype(tfm) == |
| CRYPTO_ALG_SUB_TYPE_AEAD_RFC4106) { |
| memcpy(reqctx->iv, aeadctx->salt, 4); |
| memcpy(reqctx->iv + 4, req->iv, 8); |
| } else { |
| memcpy(reqctx->iv, req->iv, 12); |
| } |
| *((unsigned int *)(reqctx->iv + 12)) = htonl(0x01); |
| |
| phys_cpl = (struct cpl_rx_phys_dsgl *)((u8 *)(chcr_req + 1) + kctx_len); |
| sg_param.nents = reqctx->dst_nents; |
| sg_param.obsize = req->cryptlen + (op_type ? -authsize : authsize); |
| sg_param.qid = qid; |
| error = map_writesg_phys_cpl(&u_ctx->lldi.pdev->dev, phys_cpl, |
| reqctx->dst, &sg_param); |
| if (error) |
| goto dstmap_fail; |
| |
| skb_set_transport_header(skb, transhdr_len); |
| write_sg_to_skb(skb, &frags, req->src, assoclen); |
| write_buffer_to_skb(skb, &frags, reqctx->iv, ivsize); |
| write_sg_to_skb(skb, &frags, src, req->cryptlen); |
| atomic_inc(&adap->chcr_stats.aead_rqst); |
| create_wreq(ctx, chcr_req, &req->base, skb, kctx_len, size, 1, |
| sizeof(struct cpl_rx_phys_dsgl) + dst_size, |
| reqctx->verify); |
| reqctx->skb = skb; |
| skb_get(skb); |
| return skb; |
| |
| dstmap_fail: |
| /* ivmap_fail: */ |
| kfree_skb(skb); |
| err: |
| free_new_sg(reqctx->newdstsg); |
| reqctx->newdstsg = NULL; |
| return ERR_PTR(error); |
| } |
| |
| |
| |
| static int chcr_aead_cra_init(struct crypto_aead *tfm) |
| { |
| struct chcr_context *ctx = crypto_aead_ctx(tfm); |
| struct chcr_aead_ctx *aeadctx = AEAD_CTX(ctx); |
| struct aead_alg *alg = crypto_aead_alg(tfm); |
| |
| aeadctx->sw_cipher = crypto_alloc_aead(alg->base.cra_name, 0, |
| CRYPTO_ALG_NEED_FALLBACK | |
| CRYPTO_ALG_ASYNC); |
| if (IS_ERR(aeadctx->sw_cipher)) |
| return PTR_ERR(aeadctx->sw_cipher); |
| crypto_aead_set_reqsize(tfm, max(sizeof(struct chcr_aead_reqctx), |
| sizeof(struct aead_request) + |
| crypto_aead_reqsize(aeadctx->sw_cipher))); |
| aeadctx->null = crypto_get_default_null_skcipher(); |
| if (IS_ERR(aeadctx->null)) |
| return PTR_ERR(aeadctx->null); |
| return chcr_device_init(ctx); |
| } |
| |
| static void chcr_aead_cra_exit(struct crypto_aead *tfm) |
| { |
| struct chcr_context *ctx = crypto_aead_ctx(tfm); |
| struct chcr_aead_ctx *aeadctx = AEAD_CTX(ctx); |
| |
| crypto_put_default_null_skcipher(); |
| crypto_free_aead(aeadctx->sw_cipher); |
| } |
| |
| static int chcr_authenc_null_setauthsize(struct crypto_aead *tfm, |
| unsigned int authsize) |
| { |
| struct chcr_aead_ctx *aeadctx = AEAD_CTX(crypto_aead_ctx(tfm)); |
| |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_NOP; |
| aeadctx->mayverify = VERIFY_HW; |
| return crypto_aead_setauthsize(aeadctx->sw_cipher, authsize); |
| } |
| static int chcr_authenc_setauthsize(struct crypto_aead *tfm, |
| unsigned int authsize) |
| { |
| struct chcr_aead_ctx *aeadctx = AEAD_CTX(crypto_aead_ctx(tfm)); |
| u32 maxauth = crypto_aead_maxauthsize(tfm); |
| |
| /*SHA1 authsize in ipsec is 12 instead of 10 i.e maxauthsize / 2 is not |
| * true for sha1. authsize == 12 condition should be before |
| * authsize == (maxauth >> 1) |
| */ |
| if (authsize == ICV_4) { |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_PL1; |
| aeadctx->mayverify = VERIFY_HW; |
| } else if (authsize == ICV_6) { |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_PL2; |
| aeadctx->mayverify = VERIFY_HW; |
| } else if (authsize == ICV_10) { |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_TRUNC_RFC4366; |
| aeadctx->mayverify = VERIFY_HW; |
| } else if (authsize == ICV_12) { |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_IPSEC_96BIT; |
| aeadctx->mayverify = VERIFY_HW; |
| } else if (authsize == ICV_14) { |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_PL3; |
| aeadctx->mayverify = VERIFY_HW; |
| } else if (authsize == (maxauth >> 1)) { |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_DIV2; |
| aeadctx->mayverify = VERIFY_HW; |
| } else if (authsize == maxauth) { |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_NO_TRUNC; |
| aeadctx->mayverify = VERIFY_HW; |
| } else { |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_NO_TRUNC; |
| aeadctx->mayverify = VERIFY_SW; |
| } |
| return crypto_aead_setauthsize(aeadctx->sw_cipher, authsize); |
| } |
| |
| |
| static int chcr_gcm_setauthsize(struct crypto_aead *tfm, unsigned int authsize) |
| { |
| struct chcr_aead_ctx *aeadctx = AEAD_CTX(crypto_aead_ctx(tfm)); |
| |
| switch (authsize) { |
| case ICV_4: |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_PL1; |
| aeadctx->mayverify = VERIFY_HW; |
| break; |
| case ICV_8: |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_DIV2; |
| aeadctx->mayverify = VERIFY_HW; |
| break; |
| case ICV_12: |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_IPSEC_96BIT; |
| aeadctx->mayverify = VERIFY_HW; |
| break; |
| case ICV_14: |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_PL3; |
| aeadctx->mayverify = VERIFY_HW; |
| break; |
| case ICV_16: |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_NO_TRUNC; |
| aeadctx->mayverify = VERIFY_HW; |
| break; |
| case ICV_13: |
| case ICV_15: |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_NO_TRUNC; |
| aeadctx->mayverify = VERIFY_SW; |
| break; |
| default: |
| |
| crypto_tfm_set_flags((struct crypto_tfm *) tfm, |
| CRYPTO_TFM_RES_BAD_KEY_LEN); |
| return -EINVAL; |
| } |
| return crypto_aead_setauthsize(aeadctx->sw_cipher, authsize); |
| } |
| |
| static int chcr_4106_4309_setauthsize(struct crypto_aead *tfm, |
| unsigned int authsize) |
| { |
| struct chcr_aead_ctx *aeadctx = AEAD_CTX(crypto_aead_ctx(tfm)); |
| |
| switch (authsize) { |
| case ICV_8: |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_DIV2; |
| aeadctx->mayverify = VERIFY_HW; |
| break; |
| case ICV_12: |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_IPSEC_96BIT; |
| aeadctx->mayverify = VERIFY_HW; |
| break; |
| case ICV_16: |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_NO_TRUNC; |
| aeadctx->mayverify = VERIFY_HW; |
| break; |
| default: |
| crypto_tfm_set_flags((struct crypto_tfm *)tfm, |
| CRYPTO_TFM_RES_BAD_KEY_LEN); |
| return -EINVAL; |
| } |
| return crypto_aead_setauthsize(aeadctx->sw_cipher, authsize); |
| } |
| |
| static int chcr_ccm_setauthsize(struct crypto_aead *tfm, |
| unsigned int authsize) |
| { |
| struct chcr_aead_ctx *aeadctx = AEAD_CTX(crypto_aead_ctx(tfm)); |
| |
| switch (authsize) { |
| case ICV_4: |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_PL1; |
| aeadctx->mayverify = VERIFY_HW; |
| break; |
| case ICV_6: |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_PL2; |
| aeadctx->mayverify = VERIFY_HW; |
| break; |
| case ICV_8: |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_DIV2; |
| aeadctx->mayverify = VERIFY_HW; |
| break; |
| case ICV_10: |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_TRUNC_RFC4366; |
| aeadctx->mayverify = VERIFY_HW; |
| break; |
| case ICV_12: |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_IPSEC_96BIT; |
| aeadctx->mayverify = VERIFY_HW; |
| break; |
| case ICV_14: |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_PL3; |
| aeadctx->mayverify = VERIFY_HW; |
| break; |
| case ICV_16: |
| aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_NO_TRUNC; |
| aeadctx->mayverify = VERIFY_HW; |
| break; |
| default: |
| crypto_tfm_set_flags((struct crypto_tfm *)tfm, |
| CRYPTO_TFM_RES_BAD_KEY_LEN); |
| return -EINVAL; |
| } |
| return crypto_aead_setauthsize(aeadctx->sw_cipher, authsize); |
| } |
| |
| static int chcr_ccm_common_setkey(struct crypto_aead *aead, |
| const u8 *key, |
| unsigned int keylen) |
| { |
| struct chcr_context *ctx = crypto_aead_ctx(aead); |
| struct chcr_aead_ctx *aeadctx = AEAD_CTX(ctx); |
| unsigned char ck_size, mk_size; |
| int key_ctx_size = 0; |
| |
| key_ctx_size = sizeof(struct _key_ctx) + |
| ((DIV_ROUND_UP(keylen, 16)) << 4) * 2; |
| if (keylen == AES_KEYSIZE_128) { |
| mk_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_128; |
| ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_128; |
| } else if (keylen == AES_KEYSIZE_192) { |
| ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_192; |
| mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_192; |
| } else if (keylen == AES_KEYSIZE_256) { |
| ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_256; |
| mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_256; |
| } else { |
| crypto_tfm_set_flags((struct crypto_tfm *)aead, |
| CRYPTO_TFM_RES_BAD_KEY_LEN); |
| aeadctx->enckey_len = 0; |
| return -EINVAL; |
| } |
| aeadctx->key_ctx_hdr = FILL_KEY_CTX_HDR(ck_size, mk_size, 0, 0, |
| key_ctx_size >> 4); |
| memcpy(aeadctx->key, key, keylen); |
| aeadctx->enckey_len = keylen; |
| |
| return 0; |
| } |
| |
| static int chcr_aead_ccm_setkey(struct crypto_aead *aead, |
| const u8 *key, |
| unsigned int keylen) |
| { |
| struct chcr_context *ctx = crypto_aead_ctx(aead); |
| struct chcr_aead_ctx *aeadctx = AEAD_CTX(ctx); |
| int error; |
| |
| crypto_aead_clear_flags(aeadctx->sw_cipher, CRYPTO_TFM_REQ_MASK); |
| crypto_aead_set_flags(aeadctx->sw_cipher, crypto_aead_get_flags(aead) & |
| CRYPTO_TFM_REQ_MASK); |
| error = crypto_aead_setkey(aeadctx->sw_cipher, key, keylen); |
| crypto_aead_clear_flags(aead, CRYPTO_TFM_RES_MASK); |
| crypto_aead_set_flags(aead, crypto_aead_get_flags(aeadctx->sw_cipher) & |
| CRYPTO_TFM_RES_MASK); |
| if (error) |
| return error; |
| return chcr_ccm_common_setkey(aead, key, keylen); |
| } |
| |
| static int chcr_aead_rfc4309_setkey(struct crypto_aead *aead, const u8 *key, |
| unsigned int keylen) |
| { |
| struct chcr_context *ctx = crypto_aead_ctx(aead); |
| struct chcr_aead_ctx *aeadctx = AEAD_CTX(ctx); |
| int error; |
| |
| if (keylen < 3) { |
| crypto_tfm_set_flags((struct crypto_tfm *)aead, |
| CRYPTO_TFM_RES_BAD_KEY_LEN); |
| aeadctx->enckey_len = 0; |
| return -EINVAL; |
| } |
| crypto_aead_clear_flags(aeadctx->sw_cipher, CRYPTO_TFM_REQ_MASK); |
| crypto_aead_set_flags(aeadctx->sw_cipher, crypto_aead_get_flags(aead) & |
| CRYPTO_TFM_REQ_MASK); |
| error = crypto_aead_setkey(aeadctx->sw_cipher, key, keylen); |
| crypto_aead_clear_flags(aead, CRYPTO_TFM_RES_MASK); |
| crypto_aead_set_flags(aead, crypto_aead_get_flags(aeadctx->sw_cipher) & |
| CRYPTO_TFM_RES_MASK); |
| if (error) |
| return error; |
| keylen -= 3; |
| memcpy(aeadctx->salt, key + keylen, 3); |
| return chcr_ccm_common_setkey(aead, key, keylen); |
| } |
| |
| static int chcr_gcm_setkey(struct crypto_aead *aead, const u8 *key, |
| unsigned int keylen) |
| { |
| struct chcr_context *ctx = crypto_aead_ctx(aead); |
| struct chcr_aead_ctx *aeadctx = AEAD_CTX(ctx); |
| struct chcr_gcm_ctx *gctx = GCM_CTX(aeadctx); |
| struct crypto_cipher *cipher; |
| unsigned int ck_size; |
| int ret = 0, key_ctx_size = 0; |
| |
| aeadctx->enckey_len = 0; |
| crypto_aead_clear_flags(aeadctx->sw_cipher, CRYPTO_TFM_REQ_MASK); |
| crypto_aead_set_flags(aeadctx->sw_cipher, crypto_aead_get_flags(aead) |
| & CRYPTO_TFM_REQ_MASK); |
| ret = crypto_aead_setkey(aeadctx->sw_cipher, key, keylen); |
| crypto_aead_clear_flags(aead, CRYPTO_TFM_RES_MASK); |
| crypto_aead_set_flags(aead, crypto_aead_get_flags(aeadctx->sw_cipher) & |
| CRYPTO_TFM_RES_MASK); |
| if (ret) |
| goto out; |
| |
| if (get_aead_subtype(aead) == CRYPTO_ALG_SUB_TYPE_AEAD_RFC4106 && |
| keylen > 3) { |
| keylen -= 4; /* nonce/salt is present in the last 4 bytes */ |
| memcpy(aeadctx->salt, key + keylen, 4); |
| } |
| if (keylen == AES_KEYSIZE_128) { |
| ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_128; |
| } else if (keylen == AES_KEYSIZE_192) { |
| ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_192; |
| } else if (keylen == AES_KEYSIZE_256) { |
| ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_256; |
| } else { |
| crypto_tfm_set_flags((struct crypto_tfm *)aead, |
| CRYPTO_TFM_RES_BAD_KEY_LEN); |
| pr_err("GCM: Invalid key length %d\n", keylen); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| memcpy(aeadctx->key, key, keylen); |
| aeadctx->enckey_len = keylen; |
| key_ctx_size = sizeof(struct _key_ctx) + |
| ((DIV_ROUND_UP(keylen, 16)) << 4) + |
| AEAD_H_SIZE; |
| aeadctx->key_ctx_hdr = FILL_KEY_CTX_HDR(ck_size, |
| CHCR_KEYCTX_MAC_KEY_SIZE_128, |
| 0, 0, |
| key_ctx_size >> 4); |
| /* Calculate the H = CIPH(K, 0 repeated 16 times). |
| * It will go in key context |
| */ |
| cipher = crypto_alloc_cipher("aes-generic", 0, 0); |
| if (IS_ERR(cipher)) { |
| aeadctx->enckey_len = 0; |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| ret = crypto_cipher_setkey(cipher, key, keylen); |
| if (ret) { |
| aeadctx->enckey_len = 0; |
| goto out1; |
| } |
| memset(gctx->ghash_h, 0, AEAD_H_SIZE); |
| crypto_cipher_encrypt_one(cipher, gctx->ghash_h, gctx->ghash_h); |
| |
| out1: |
| crypto_free_cipher(cipher); |
| out: |
| return ret; |
| } |
| |
| static int chcr_authenc_setkey(struct crypto_aead *authenc, const u8 *key, |
| unsigned int keylen) |
| { |
| struct chcr_context *ctx = crypto_aead_ctx(authenc); |
| struct chcr_aead_ctx *aeadctx = AEAD_CTX(ctx); |
| struct chcr_authenc_ctx *actx = AUTHENC_CTX(aeadctx); |
| /* it contains auth and cipher key both*/ |
| struct crypto_authenc_keys keys; |
| unsigned int bs; |
| unsigned int max_authsize = crypto_aead_alg(authenc)->maxauthsize; |
| int err = 0, i, key_ctx_len = 0; |
| unsigned char ck_size = 0; |
| unsigned char pad[CHCR_HASH_MAX_BLOCK_SIZE_128] = { 0 }; |
| struct crypto_shash *base_hash = ERR_PTR(-EINVAL); |
| struct algo_param param; |
| int align; |
| u8 *o_ptr = NULL; |
| |
| crypto_aead_clear_flags(aeadctx->sw_cipher, CRYPTO_TFM_REQ_MASK); |
| crypto_aead_set_flags(aeadctx->sw_cipher, crypto_aead_get_flags(authenc) |
| & CRYPTO_TFM_REQ_MASK); |
| err = crypto_aead_setkey(aeadctx->sw_cipher, key, keylen); |
| crypto_aead_clear_flags(authenc, CRYPTO_TFM_RES_MASK); |
| crypto_aead_set_flags(authenc, crypto_aead_get_flags(aeadctx->sw_cipher) |
| & CRYPTO_TFM_RES_MASK); |
| if (err) |
| goto out; |
| |
| if (crypto_authenc_extractkeys(&keys, key, keylen) != 0) { |
| crypto_aead_set_flags(authenc, CRYPTO_TFM_RES_BAD_KEY_LEN); |
| goto out; |
| } |
| |
| if (get_alg_config(¶m, max_authsize)) { |
| pr_err("chcr : Unsupported digest size\n"); |
| goto out; |
| } |
| if (keys.enckeylen == AES_KEYSIZE_128) { |
| ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_128; |
| } else if (keys.enckeylen == AES_KEYSIZE_192) { |
| ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_192; |
| } else if (keys.enckeylen == AES_KEYSIZE_256) { |
| ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_256; |
| } else { |
| pr_err("chcr : Unsupported cipher key\n"); |
| goto out; |
| } |
| |
| /* Copy only encryption key. We use authkey to generate h(ipad) and |
| * h(opad) so authkey is not needed again. authkeylen size have the |
| * size of the hash digest size. |
| */ |
| memcpy(aeadctx->key, keys.enckey, keys.enckeylen); |
| aeadctx->enckey_len = keys.enckeylen; |
| get_aes_decrypt_key(actx->dec_rrkey, aeadctx->key, |
| aeadctx->enckey_len << 3); |
| |
| base_hash = chcr_alloc_shash(max_authsize); |
| if (IS_ERR(base_hash)) { |
| pr_err("chcr : Base driver cannot be loaded\n"); |
| aeadctx->enckey_len = 0; |
| return -EINVAL; |
| } |
| { |
| SHASH_DESC_ON_STACK(shash, base_hash); |
| shash->tfm = base_hash; |
| shash->flags = crypto_shash_get_flags(base_hash); |
| bs = crypto_shash_blocksize(base_hash); |
| align = KEYCTX_ALIGN_PAD(max_authsize); |
| o_ptr = actx->h_iopad + param.result_size + align; |
| |
| if (keys.authkeylen > bs) { |
| err = crypto_shash_digest(shash, keys.authkey, |
| keys.authkeylen, |
| o_ptr); |
| if (err) { |
| pr_err("chcr : Base driver cannot be loaded\n"); |
| goto out; |
| } |
| keys.authkeylen = max_authsize; |
| } else |
| memcpy(o_ptr, keys.authkey, keys.authkeylen); |
| |
| /* Compute the ipad-digest*/ |
| memset(pad + keys.authkeylen, 0, bs - keys.authkeylen); |
| memcpy(pad, o_ptr, keys.authkeylen); |
| for (i = 0; i < bs >> 2; i++) |
| *((unsigned int *)pad + i) ^= IPAD_DATA; |
| |
| if (chcr_compute_partial_hash(shash, pad, actx->h_iopad, |
| max_authsize)) |
| goto out; |
| /* Compute the opad-digest */ |
| memset(pad + keys.authkeylen, 0, bs - keys.authkeylen); |
| memcpy(pad, o_ptr, keys.authkeylen); |
| for (i = 0; i < bs >> 2; i++) |
| *((unsigned int *)pad + i) ^= OPAD_DATA; |
| |
| if (chcr_compute_partial_hash(shash, pad, o_ptr, max_authsize)) |
| goto out; |
| |
| /* convert the ipad and opad digest to network order */ |
| chcr_change_order(actx->h_iopad, param.result_size); |
| chcr_change_order(o_ptr, param.result_size); |
| key_ctx_len = sizeof(struct _key_ctx) + |
| ((DIV_ROUND_UP(keys.enckeylen, 16)) << 4) + |
| (param.result_size + align) * 2; |
| aeadctx->key_ctx_hdr = FILL_KEY_CTX_HDR(ck_size, param.mk_size, |
| 0, 1, key_ctx_len >> 4); |
| actx->auth_mode = param.auth_mode; |
| chcr_free_shash(base_hash); |
| |
| return 0; |
| } |
| out: |
| aeadctx->enckey_len = 0; |
| if (!IS_ERR(base_hash)) |
| chcr_free_shash(base_hash); |
| return -EINVAL; |
| } |
| |
| static int chcr_aead_digest_null_setkey(struct crypto_aead *authenc, |
| const u8 *key, unsigned int keylen) |
| { |
| struct chcr_context *ctx = crypto_aead_ctx(authenc); |
| struct chcr_aead_ctx *aeadctx = AEAD_CTX(ctx); |
| struct chcr_authenc_ctx *actx = AUTHENC_CTX(aeadctx); |
| struct crypto_authenc_keys keys; |
| int err; |
| /* it contains auth and cipher key both*/ |
| int key_ctx_len = 0; |
| unsigned char ck_size = 0; |
| |
| crypto_aead_clear_flags(aeadctx->sw_cipher, CRYPTO_TFM_REQ_MASK); |
| crypto_aead_set_flags(aeadctx->sw_cipher, crypto_aead_get_flags(authenc) |
| & CRYPTO_TFM_REQ_MASK); |
| err = crypto_aead_setkey(aeadctx->sw_cipher, key, keylen); |
| crypto_aead_clear_flags(authenc, CRYPTO_TFM_RES_MASK); |
| crypto_aead_set_flags(authenc, crypto_aead_get_flags(aeadctx->sw_cipher) |
| & CRYPTO_TFM_RES_MASK); |
| if (err) |
| goto out; |
| |
| if (crypto_authenc_extractkeys(&keys, key, keylen) != 0) { |
| crypto_aead_set_flags(authenc, CRYPTO_TFM_RES_BAD_KEY_LEN); |
| goto out; |
| } |
| if (keys.enckeylen == AES_KEYSIZE_128) { |
| ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_128; |
| } else if (keys.enckeylen == AES_KEYSIZE_192) { |
| ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_192; |
| } else if (keys.enckeylen == AES_KEYSIZE_256) { |
| ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_256; |
| } else { |
| pr_err("chcr : Unsupported cipher key\n"); |
| goto out; |
| } |
| memcpy(aeadctx->key, keys.enckey, keys.enckeylen); |
| aeadctx->enckey_len = keys.enckeylen; |
| get_aes_decrypt_key(actx->dec_rrkey, aeadctx->key, |
| aeadctx->enckey_len << 3); |
| key_ctx_len = sizeof(struct _key_ctx) |
| + ((DIV_ROUND_UP(keys.enckeylen, 16)) << 4); |
| |
| aeadctx->key_ctx_hdr = FILL_KEY_CTX_HDR(ck_size, CHCR_KEYCTX_NO_KEY, 0, |
| 0, key_ctx_len >> 4); |
| actx->auth_mode = CHCR_SCMD_AUTH_MODE_NOP; |
| return 0; |
| out: |
| aeadctx->enckey_len = 0; |
| return -EINVAL; |
| } |
| static int chcr_aead_encrypt(struct aead_request *req) |
| { |
| struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
| struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); |
| |
| reqctx->verify = VERIFY_HW; |
| |
| switch (get_aead_subtype(tfm)) { |
| case CRYPTO_ALG_SUB_TYPE_AEAD_AUTHENC: |
| case CRYPTO_ALG_SUB_TYPE_AEAD_NULL: |
| return chcr_aead_op(req, CHCR_ENCRYPT_OP, 0, |
| create_authenc_wr); |
| case CRYPTO_ALG_SUB_TYPE_AEAD_CCM: |
| case CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309: |
| return chcr_aead_op(req, CHCR_ENCRYPT_OP, 0, |
| create_aead_ccm_wr); |
| default: |
| return chcr_aead_op(req, CHCR_ENCRYPT_OP, 0, |
| create_gcm_wr); |
| } |
| } |
| |
| static int chcr_aead_decrypt(struct aead_request *req) |
| { |
| struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
| struct chcr_aead_ctx *aeadctx = AEAD_CTX(crypto_aead_ctx(tfm)); |
| struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); |
| int size; |
| |
| if (aeadctx->mayverify == VERIFY_SW) { |
| size = crypto_aead_maxauthsize(tfm); |
| reqctx->verify = VERIFY_SW; |
| } else { |
| size = 0; |
| reqctx->verify = VERIFY_HW; |
| } |
| |
| switch (get_aead_subtype(tfm)) { |
| case CRYPTO_ALG_SUB_TYPE_AEAD_AUTHENC: |
| case CRYPTO_ALG_SUB_TYPE_AEAD_NULL: |
| return chcr_aead_op(req, CHCR_DECRYPT_OP, size, |
| create_authenc_wr); |
| case CRYPTO_ALG_SUB_TYPE_AEAD_CCM: |
| case CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309: |
| return chcr_aead_op(req, CHCR_DECRYPT_OP, size, |
| create_aead_ccm_wr); |
| default: |
| return chcr_aead_op(req, CHCR_DECRYPT_OP, size, |
| create_gcm_wr); |
| } |
| } |
| |
| static int chcr_aead_op(struct aead_request *req, |
| unsigned short op_type, |
| int size, |
| create_wr_t create_wr_fn) |
| { |
| struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
| struct chcr_context *ctx = crypto_aead_ctx(tfm); |
| struct uld_ctx *u_ctx; |
| struct sk_buff *skb; |
| |
| if (!ctx->dev) { |
| pr_err("chcr : %s : No crypto device.\n", __func__); |
| return -ENXIO; |
| } |
| u_ctx = ULD_CTX(ctx); |
| if (cxgb4_is_crypto_q_full(u_ctx->lldi.ports[0], |
| ctx->tx_qidx)) { |
| if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) |
| return -EBUSY; |
| } |
| |
| /* Form a WR from req */ |
| skb = create_wr_fn(req, u_ctx->lldi.rxq_ids[ctx->rx_qidx], size, |
| op_type); |
| |
| if (IS_ERR(skb) || !skb) |
| return PTR_ERR(skb); |
| |
| skb->dev = u_ctx->lldi.ports[0]; |
| set_wr_txq(skb, CPL_PRIORITY_DATA, ctx->tx_qidx); |
| chcr_send_wr(skb); |
| return -EINPROGRESS; |
| } |
| static struct chcr_alg_template driver_algs[] = { |
| /* AES-CBC */ |
| { |
| .type = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_SUB_TYPE_CBC, |
| .is_registered = 0, |
| .alg.crypto = { |
| .cra_name = "cbc(aes)", |
| .cra_driver_name = "cbc-aes-chcr", |
| .cra_blocksize = AES_BLOCK_SIZE, |
| .cra_init = chcr_cra_init, |
| .cra_exit = chcr_cra_exit, |
| .cra_u.ablkcipher = { |
| .min_keysize = AES_MIN_KEY_SIZE, |
| .max_keysize = AES_MAX_KEY_SIZE, |
| .ivsize = AES_BLOCK_SIZE, |
| .setkey = chcr_aes_cbc_setkey, |
| .encrypt = chcr_aes_encrypt, |
| .decrypt = chcr_aes_decrypt, |
| } |
| } |
| }, |
| { |
| .type = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_SUB_TYPE_XTS, |
| .is_registered = 0, |
| .alg.crypto = { |
| .cra_name = "xts(aes)", |
| .cra_driver_name = "xts-aes-chcr", |
| .cra_blocksize = AES_BLOCK_SIZE, |
| .cra_init = chcr_cra_init, |
| .cra_exit = NULL, |
| .cra_u .ablkcipher = { |
| .min_keysize = 2 * AES_MIN_KEY_SIZE, |
| .max_keysize = 2 * AES_MAX_KEY_SIZE, |
| .ivsize = AES_BLOCK_SIZE, |
| .setkey = chcr_aes_xts_setkey, |
| .encrypt = chcr_aes_encrypt, |
| .decrypt = chcr_aes_decrypt, |
| } |
| } |
| }, |
| { |
| .type = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_SUB_TYPE_CTR, |
| .is_registered = 0, |
| .alg.crypto = { |
| .cra_name = "ctr(aes)", |
| .cra_driver_name = "ctr-aes-chcr", |
| .cra_blocksize = 1, |
| .cra_init = chcr_cra_init, |
| .cra_exit = chcr_cra_exit, |
| .cra_u.ablkcipher = { |
| .min_keysize = AES_MIN_KEY_SIZE, |
| .max_keysize = AES_MAX_KEY_SIZE, |
| .ivsize = AES_BLOCK_SIZE, |
| .setkey = chcr_aes_ctr_setkey, |
| .encrypt = chcr_aes_encrypt, |
| .decrypt = chcr_aes_decrypt, |
| } |
| } |
| }, |
| { |
| .type = CRYPTO_ALG_TYPE_ABLKCIPHER | |
| CRYPTO_ALG_SUB_TYPE_CTR_RFC3686, |
| .is_registered = 0, |
| .alg.crypto = { |
| .cra_name = "rfc3686(ctr(aes))", |
| .cra_driver_name = "rfc3686-ctr-aes-chcr", |
| .cra_blocksize = 1, |
| .cra_init = chcr_rfc3686_init, |
| .cra_exit = chcr_cra_exit, |
| .cra_u.ablkcipher = { |
| .min_keysize = AES_MIN_KEY_SIZE + |
| CTR_RFC3686_NONCE_SIZE, |
| .max_keysize = AES_MAX_KEY_SIZE + |
| CTR_RFC3686_NONCE_SIZE, |
| .ivsize = CTR_RFC3686_IV_SIZE, |
| .setkey = chcr_aes_rfc3686_setkey, |
| .encrypt = chcr_aes_encrypt, |
| .decrypt = chcr_aes_decrypt, |
| .geniv = "seqiv", |
| } |
| } |
| }, |
| /* SHA */ |
| { |
| .type = CRYPTO_ALG_TYPE_AHASH, |
| .is_registered = 0, |
| .alg.hash = { |
| .halg.digestsize = SHA1_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "sha1", |
| .cra_driver_name = "sha1-chcr", |
| .cra_blocksize = SHA1_BLOCK_SIZE, |
| } |
| } |
| }, |
| { |
| .type = CRYPTO_ALG_TYPE_AHASH, |
| .is_registered = 0, |
| .alg.hash = { |
| .halg.digestsize = SHA256_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "sha256", |
| .cra_driver_name = "sha256-chcr", |
| .cra_blocksize = SHA256_BLOCK_SIZE, |
| } |
| } |
| }, |
| { |
| .type = CRYPTO_ALG_TYPE_AHASH, |
| .is_registered = 0, |
| .alg.hash = { |
| .halg.digestsize = SHA224_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "sha224", |
| .cra_driver_name = "sha224-chcr", |
| .cra_blocksize = SHA224_BLOCK_SIZE, |
| } |
| } |
| }, |
| { |
| .type = CRYPTO_ALG_TYPE_AHASH, |
| .is_registered = 0, |
| .alg.hash = { |
| .halg.digestsize = SHA384_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "sha384", |
| .cra_driver_name = "sha384-chcr", |
| .cra_blocksize = SHA384_BLOCK_SIZE, |
| } |
| } |
| }, |
| { |
| .type = CRYPTO_ALG_TYPE_AHASH, |
| .is_registered = 0, |
| .alg.hash = { |
| .halg.digestsize = SHA512_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "sha512", |
| .cra_driver_name = "sha512-chcr", |
| .cra_blocksize = SHA512_BLOCK_SIZE, |
| } |
| } |
| }, |
| /* HMAC */ |
| { |
| .type = CRYPTO_ALG_TYPE_HMAC, |
| .is_registered = 0, |
| .alg.hash = { |
| .halg.digestsize = SHA1_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "hmac(sha1)", |
| .cra_driver_name = "hmac-sha1-chcr", |
| .cra_blocksize = SHA1_BLOCK_SIZE, |
| } |
| } |
| }, |
| { |
| .type = CRYPTO_ALG_TYPE_HMAC, |
| .is_registered = 0, |
| .alg.hash = { |
| .halg.digestsize = SHA224_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "hmac(sha224)", |
| .cra_driver_name = "hmac-sha224-chcr", |
| .cra_blocksize = SHA224_BLOCK_SIZE, |
| } |
| } |
| }, |
| { |
| .type = CRYPTO_ALG_TYPE_HMAC, |
| .is_registered = 0, |
| .alg.hash = { |
| .halg.digestsize = SHA256_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "hmac(sha256)", |
| .cra_driver_name = "hmac-sha256-chcr", |
| .cra_blocksize = SHA256_BLOCK_SIZE, |
| } |
| } |
| }, |
| { |
| .type = CRYPTO_ALG_TYPE_HMAC, |
| .is_registered = 0, |
| .alg.hash = { |
| .halg.digestsize = SHA384_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "hmac(sha384)", |
| .cra_driver_name = "hmac-sha384-chcr", |
| .cra_blocksize = SHA384_BLOCK_SIZE, |
| } |
| } |
| }, |
| { |
| .type = CRYPTO_ALG_TYPE_HMAC, |
| .is_registered = 0, |
| .alg.hash = { |
| .halg.digestsize = SHA512_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "hmac(sha512)", |
| .cra_driver_name = "hmac-sha512-chcr", |
| .cra_blocksize = SHA512_BLOCK_SIZE, |
| } |
| } |
| }, |
| /* Add AEAD Algorithms */ |
| { |
| .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_AEAD_GCM, |
| .is_registered = 0, |
| .alg.aead = { |
| .base = { |
| .cra_name = "gcm(aes)", |
| .cra_driver_name = "gcm-aes-chcr", |
| .cra_blocksize = 1, |
| .cra_priority = CHCR_AEAD_PRIORITY, |
| .cra_ctxsize = sizeof(struct chcr_context) + |
| sizeof(struct chcr_aead_ctx) + |
| sizeof(struct chcr_gcm_ctx), |
| }, |
| .ivsize = 12, |
| .maxauthsize = GHASH_DIGEST_SIZE, |
| .setkey = chcr_gcm_setkey, |
| .setauthsize = chcr_gcm_setauthsize, |
| } |
| }, |
| { |
| .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_AEAD_RFC4106, |
| .is_registered = 0, |
| .alg.aead = { |
| .base = { |
| .cra_name = "rfc4106(gcm(aes))", |
| .cra_driver_name = "rfc4106-gcm-aes-chcr", |
| .cra_blocksize = 1, |
| .cra_priority = CHCR_AEAD_PRIORITY + 1, |
| .cra_ctxsize = sizeof(struct chcr_context) + |
| sizeof(struct chcr_aead_ctx) + |
| sizeof(struct chcr_gcm_ctx), |
| |
| }, |
| .ivsize = 8, |
| .maxauthsize = GHASH_DIGEST_SIZE, |
| .setkey = chcr_gcm_setkey, |
| .setauthsize = chcr_4106_4309_setauthsize, |
| } |
| }, |
| { |
| .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_AEAD_CCM, |
| .is_registered = 0, |
| .alg.aead = { |
| .base = { |
| .cra_name = "ccm(aes)", |
| .cra_driver_name = "ccm-aes-chcr", |
| .cra_blocksize = 1, |
| .cra_priority = CHCR_AEAD_PRIORITY, |
| .cra_ctxsize = sizeof(struct chcr_context) + |
| sizeof(struct chcr_aead_ctx), |
| |
| }, |
| .ivsize = AES_BLOCK_SIZE, |
| .maxauthsize = GHASH_DIGEST_SIZE, |
| .setkey = chcr_aead_ccm_setkey, |
| .setauthsize = chcr_ccm_setauthsize, |
| } |
| }, |
| { |
| .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309, |
| .is_registered = 0, |
| .alg.aead = { |
| .base = { |
| .cra_name = "rfc4309(ccm(aes))", |
| .cra_driver_name = "rfc4309-ccm-aes-chcr", |
| .cra_blocksize = 1, |
| .cra_priority = CHCR_AEAD_PRIORITY + 1, |
| .cra_ctxsize = sizeof(struct chcr_context) + |
| sizeof(struct chcr_aead_ctx), |
| |
| }, |
| .ivsize = 8, |
| .maxauthsize = GHASH_DIGEST_SIZE, |
| .setkey = chcr_aead_rfc4309_setkey, |
| .setauthsize = chcr_4106_4309_setauthsize, |
| } |
| }, |
| { |
| .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_AEAD_AUTHENC, |
| .is_registered = 0, |
| .alg.aead = { |
| .base = { |
| .cra_name = "authenc(hmac(sha1),cbc(aes))", |
| .cra_driver_name = |
| "authenc-hmac-sha1-cbc-aes-chcr", |
| .cra_blocksize = AES_BLOCK_SIZE, |
| .cra_priority = CHCR_AEAD_PRIORITY, |
| .cra_ctxsize = sizeof(struct chcr_context) + |
| sizeof(struct chcr_aead_ctx) + |
| sizeof(struct chcr_authenc_ctx), |
| |
| }, |
| .ivsize = AES_BLOCK_SIZE, |
| .maxauthsize = SHA1_DIGEST_SIZE, |
| .setkey = chcr_authenc_setkey, |
| .setauthsize = chcr_authenc_setauthsize, |
| } |
| }, |
| { |
| .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_AEAD_AUTHENC, |
| .is_registered = 0, |
| .alg.aead = { |
| .base = { |
| |
| .cra_name = "authenc(hmac(sha256),cbc(aes))", |
| .cra_driver_name = |
| "authenc-hmac-sha256-cbc-aes-chcr", |
| .cra_blocksize = AES_BLOCK_SIZE, |
| .cra_priority = CHCR_AEAD_PRIORITY, |
| .cra_ctxsize = sizeof(struct chcr_context) + |
| sizeof(struct chcr_aead_ctx) + |
| sizeof(struct chcr_authenc_ctx), |
| |
| }, |
| .ivsize = AES_BLOCK_SIZE, |
| .maxauthsize = SHA256_DIGEST_SIZE, |
| .setkey = chcr_authenc_setkey, |
| .setauthsize = chcr_authenc_setauthsize, |
| } |
| }, |
| { |
| .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_AEAD_AUTHENC, |
| .is_registered = 0, |
| .alg.aead = { |
| .base = { |
| .cra_name = "authenc(hmac(sha224),cbc(aes))", |
| .cra_driver_name = |
| "authenc-hmac-sha224-cbc-aes-chcr", |
| .cra_blocksize = AES_BLOCK_SIZE, |
| .cra_priority = CHCR_AEAD_PRIORITY, |
| .cra_ctxsize = sizeof(struct chcr_context) + |
| sizeof(struct chcr_aead_ctx) + |
| sizeof(struct chcr_authenc_ctx), |
| }, |
| .ivsize = AES_BLOCK_SIZE, |
| .maxauthsize = SHA224_DIGEST_SIZE, |
| .setkey = chcr_authenc_setkey, |
| .setauthsize = chcr_authenc_setauthsize, |
| } |
| }, |
| { |
| .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_AEAD_AUTHENC, |
| .is_registered = 0, |
| .alg.aead = { |
| .base = { |
| .cra_name = "authenc(hmac(sha384),cbc(aes))", |
| .cra_driver_name = |
| "authenc-hmac-sha384-cbc-aes-chcr", |
| .cra_blocksize = AES_BLOCK_SIZE, |
| .cra_priority = CHCR_AEAD_PRIORITY, |
| .cra_ctxsize = sizeof(struct chcr_context) + |
| sizeof(struct chcr_aead_ctx) + |
| sizeof(struct chcr_authenc_ctx), |
| |
| }, |
| .ivsize = AES_BLOCK_SIZE, |
| .maxauthsize = SHA384_DIGEST_SIZE, |
| .setkey = chcr_authenc_setkey, |
| .setauthsize = chcr_authenc_setauthsize, |
| } |
| }, |
| { |
| .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_AEAD_AUTHENC, |
| .is_registered = 0, |
| .alg.aead = { |
| .base = { |
| .cra_name = "authenc(hmac(sha512),cbc(aes))", |
| .cra_driver_name = |
| "authenc-hmac-sha512-cbc-aes-chcr", |
| .cra_blocksize = AES_BLOCK_SIZE, |
| .cra_priority = CHCR_AEAD_PRIORITY, |
| .cra_ctxsize = sizeof(struct chcr_context) + |
| sizeof(struct chcr_aead_ctx) + |
| sizeof(struct chcr_authenc_ctx), |
| |
| }, |
| .ivsize = AES_BLOCK_SIZE, |
| .maxauthsize = SHA512_DIGEST_SIZE, |
| .setkey = chcr_authenc_setkey, |
| .setauthsize = chcr_authenc_setauthsize, |
| } |
| }, |
| { |
| .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_AEAD_NULL, |
| .is_registered = 0, |
| .alg.aead = { |
| .base = { |
| .cra_name = "authenc(digest_null,cbc(aes))", |
| .cra_driver_name = |
| "authenc-digest_null-cbc-aes-chcr", |
| .cra_blocksize = AES_BLOCK_SIZE, |
| .cra_priority = CHCR_AEAD_PRIORITY, |
| .cra_ctxsize = sizeof(struct chcr_context) + |
| sizeof(struct chcr_aead_ctx) + |
| sizeof(struct chcr_authenc_ctx), |
| |
| }, |
| .ivsize = AES_BLOCK_SIZE, |
| .maxauthsize = 0, |
| .setkey = chcr_aead_digest_null_setkey, |
| .setauthsize = chcr_authenc_null_setauthsize, |
| } |
| }, |
| }; |
| |
| /* |
| * chcr_unregister_alg - Deregister crypto algorithms with |
| * kernel framework. |
| */ |
| static int chcr_unregister_alg(void) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(driver_algs); i++) { |
| switch (driver_algs[i].type & CRYPTO_ALG_TYPE_MASK) { |
| case CRYPTO_ALG_TYPE_ABLKCIPHER: |
| if (driver_algs[i].is_registered) |
| crypto_unregister_alg( |
| &driver_algs[i].alg.crypto); |
| break; |
| case CRYPTO_ALG_TYPE_AEAD: |
| if (driver_algs[i].is_registered) |
| crypto_unregister_aead( |
| &driver_algs[i].alg.aead); |
| break; |
| case CRYPTO_ALG_TYPE_AHASH: |
| if (driver_algs[i].is_registered) |
| crypto_unregister_ahash( |
| &driver_algs[i].alg.hash); |
| break; |
| } |
| driver_algs[i].is_registered = 0; |
| } |
| return 0; |
| } |
| |
| #define SZ_AHASH_CTX sizeof(struct chcr_context) |
| #define SZ_AHASH_H_CTX (sizeof(struct chcr_context) + sizeof(struct hmac_ctx)) |
| #define SZ_AHASH_REQ_CTX sizeof(struct chcr_ahash_req_ctx) |
| #define AHASH_CRA_FLAGS (CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_ASYNC) |
| |
| /* |
| * chcr_register_alg - Register crypto algorithms with kernel framework. |
| */ |
| static int chcr_register_alg(void) |
| { |
| struct crypto_alg ai; |
| struct ahash_alg *a_hash; |
| int err = 0, i; |
| char *name = NULL; |
| |
| for (i = 0; i < ARRAY_SIZE(driver_algs); i++) { |
| if (driver_algs[i].is_registered) |
| continue; |
| switch (driver_algs[i].type & CRYPTO_ALG_TYPE_MASK) { |
| case CRYPTO_ALG_TYPE_ABLKCIPHER: |
| driver_algs[i].alg.crypto.cra_priority = |
| CHCR_CRA_PRIORITY; |
| driver_algs[i].alg.crypto.cra_module = THIS_MODULE; |
| driver_algs[i].alg.crypto.cra_flags = |
| CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC | |
| CRYPTO_ALG_NEED_FALLBACK; |
| driver_algs[i].alg.crypto.cra_ctxsize = |
| sizeof(struct chcr_context) + |
| sizeof(struct ablk_ctx); |
| driver_algs[i].alg.crypto.cra_alignmask = 0; |
| driver_algs[i].alg.crypto.cra_type = |
| &crypto_ablkcipher_type; |
| err = crypto_register_alg(&driver_algs[i].alg.crypto); |
| name = driver_algs[i].alg.crypto.cra_driver_name; |
| break; |
| case CRYPTO_ALG_TYPE_AEAD: |
| driver_algs[i].alg.aead.base.cra_flags = |
| CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC | |
| CRYPTO_ALG_NEED_FALLBACK; |
| driver_algs[i].alg.aead.encrypt = chcr_aead_encrypt; |
| driver_algs[i].alg.aead.decrypt = chcr_aead_decrypt; |
| driver_algs[i].alg.aead.init = chcr_aead_cra_init; |
| driver_algs[i].alg.aead.exit = chcr_aead_cra_exit; |
| driver_algs[i].alg.aead.base.cra_module = THIS_MODULE; |
| err = crypto_register_aead(&driver_algs[i].alg.aead); |
| name = driver_algs[i].alg.aead.base.cra_driver_name; |
| break; |
| case CRYPTO_ALG_TYPE_AHASH: |
| a_hash = &driver_algs[i].alg.hash; |
| a_hash->update = chcr_ahash_update; |
| a_hash->final = chcr_ahash_final; |
| a_hash->finup = chcr_ahash_finup; |
| a_hash->digest = chcr_ahash_digest; |
| a_hash->export = chcr_ahash_export; |
| a_hash->import = chcr_ahash_import; |
| a_hash->halg.statesize = SZ_AHASH_REQ_CTX; |
| a_hash->halg.base.cra_priority = CHCR_CRA_PRIORITY; |
| a_hash->halg.base.cra_module = THIS_MODULE; |
| a_hash->halg.base.cra_flags = AHASH_CRA_FLAGS; |
| a_hash->halg.base.cra_alignmask = 0; |
| a_hash->halg.base.cra_exit = NULL; |
| a_hash->halg.base.cra_type = &crypto_ahash_type; |
| |
| if (driver_algs[i].type == CRYPTO_ALG_TYPE_HMAC) { |
| a_hash->halg.base.cra_init = chcr_hmac_cra_init; |
| a_hash->halg.base.cra_exit = chcr_hmac_cra_exit; |
| a_hash->init = chcr_hmac_init; |
| a_hash->setkey = chcr_ahash_setkey; |
| a_hash->halg.base.cra_ctxsize = SZ_AHASH_H_CTX; |
| } else { |
| a_hash->init = chcr_sha_init; |
| a_hash->halg.base.cra_ctxsize = SZ_AHASH_CTX; |
| a_hash->halg.base.cra_init = chcr_sha_cra_init; |
| } |
| err = crypto_register_ahash(&driver_algs[i].alg.hash); |
| ai = driver_algs[i].alg.hash.halg.base; |
| name = ai.cra_driver_name; |
| break; |
| } |
| if (err) { |
| pr_err("chcr : %s : Algorithm registration failed\n", |
| name); |
| goto register_err; |
| } else { |
| driver_algs[i].is_registered = 1; |
| } |
| } |
| return 0; |
| |
| register_err: |
| chcr_unregister_alg(); |
| return err; |
| } |
| |
| /* |
| * start_crypto - Register the crypto algorithms. |
| * This should called once when the first device comesup. After this |
| * kernel will start calling driver APIs for crypto operations. |
| */ |
| int start_crypto(void) |
| { |
| return chcr_register_alg(); |
| } |
| |
| /* |
| * stop_crypto - Deregister all the crypto algorithms with kernel. |
| * This should be called once when the last device goes down. After this |
| * kernel will not call the driver API for crypto operations. |
| */ |
| int stop_crypto(void) |
| { |
| chcr_unregister_alg(); |
| return 0; |
| } |
