| /* |
| * Support for Intel AES-NI instructions. This file contains glue |
| * code, the real AES implementation is in intel-aes_asm.S. |
| * |
| * Copyright (C) 2008, Intel Corp. |
| * Author: Huang Ying <ying.huang@intel.com> |
| * |
| * Added RFC4106 AES-GCM support for 128-bit keys under the AEAD |
| * interface for 64-bit kernels. |
| * Authors: Adrian Hoban <adrian.hoban@intel.com> |
| * Gabriele Paoloni <gabriele.paoloni@intel.com> |
| * Tadeusz Struk (tadeusz.struk@intel.com) |
| * Aidan O'Mahony (aidan.o.mahony@intel.com) |
| * Copyright (c) 2010, Intel Corporation. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| */ |
| |
| #include <linux/hardirq.h> |
| #include <linux/types.h> |
| #include <linux/crypto.h> |
| #include <linux/module.h> |
| #include <linux/err.h> |
| #include <crypto/algapi.h> |
| #include <crypto/aes.h> |
| #include <crypto/cryptd.h> |
| #include <crypto/ctr.h> |
| #include <crypto/b128ops.h> |
| #include <crypto/lrw.h> |
| #include <crypto/xts.h> |
| #include <asm/cpu_device_id.h> |
| #include <asm/i387.h> |
| #include <asm/crypto/aes.h> |
| #include <crypto/ablk_helper.h> |
| #include <crypto/scatterwalk.h> |
| #include <crypto/internal/aead.h> |
| #include <linux/workqueue.h> |
| #include <linux/spinlock.h> |
| #ifdef CONFIG_X86_64 |
| #include <asm/crypto/glue_helper.h> |
| #endif |
| |
| #if defined(CONFIG_CRYPTO_PCBC) || defined(CONFIG_CRYPTO_PCBC_MODULE) |
| #define HAS_PCBC |
| #endif |
| |
| /* This data is stored at the end of the crypto_tfm struct. |
| * It's a type of per "session" data storage location. |
| * This needs to be 16 byte aligned. |
| */ |
| struct aesni_rfc4106_gcm_ctx { |
| u8 hash_subkey[16]; |
| struct crypto_aes_ctx aes_key_expanded; |
| u8 nonce[4]; |
| struct cryptd_aead *cryptd_tfm; |
| }; |
| |
| struct aesni_gcm_set_hash_subkey_result { |
| int err; |
| struct completion completion; |
| }; |
| |
| struct aesni_hash_subkey_req_data { |
| u8 iv[16]; |
| struct aesni_gcm_set_hash_subkey_result result; |
| struct scatterlist sg; |
| }; |
| |
| #define AESNI_ALIGN (16) |
| #define AES_BLOCK_MASK (~(AES_BLOCK_SIZE-1)) |
| #define RFC4106_HASH_SUBKEY_SIZE 16 |
| |
| struct aesni_lrw_ctx { |
| struct lrw_table_ctx lrw_table; |
| u8 raw_aes_ctx[sizeof(struct crypto_aes_ctx) + AESNI_ALIGN - 1]; |
| }; |
| |
| struct aesni_xts_ctx { |
| u8 raw_tweak_ctx[sizeof(struct crypto_aes_ctx) + AESNI_ALIGN - 1]; |
| u8 raw_crypt_ctx[sizeof(struct crypto_aes_ctx) + AESNI_ALIGN - 1]; |
| }; |
| |
| asmlinkage int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key, |
| unsigned int key_len); |
| asmlinkage void aesni_enc(struct crypto_aes_ctx *ctx, u8 *out, |
| const u8 *in); |
| asmlinkage void aesni_dec(struct crypto_aes_ctx *ctx, u8 *out, |
| const u8 *in); |
| asmlinkage void aesni_ecb_enc(struct crypto_aes_ctx *ctx, u8 *out, |
| const u8 *in, unsigned int len); |
| asmlinkage void aesni_ecb_dec(struct crypto_aes_ctx *ctx, u8 *out, |
| const u8 *in, unsigned int len); |
| asmlinkage void aesni_cbc_enc(struct crypto_aes_ctx *ctx, u8 *out, |
| const u8 *in, unsigned int len, u8 *iv); |
| asmlinkage void aesni_cbc_dec(struct crypto_aes_ctx *ctx, u8 *out, |
| const u8 *in, unsigned int len, u8 *iv); |
| |
| int crypto_fpu_init(void); |
| void crypto_fpu_exit(void); |
| |
| #define AVX_GEN2_OPTSIZE 640 |
| #define AVX_GEN4_OPTSIZE 4096 |
| |
| #ifdef CONFIG_X86_64 |
| asmlinkage void aesni_ctr_enc(struct crypto_aes_ctx *ctx, u8 *out, |
| const u8 *in, unsigned int len, u8 *iv); |
| |
| asmlinkage void aesni_xts_crypt8(struct crypto_aes_ctx *ctx, u8 *out, |
| const u8 *in, bool enc, u8 *iv); |
| |
| /* asmlinkage void aesni_gcm_enc() |
| * void *ctx, AES Key schedule. Starts on a 16 byte boundary. |
| * u8 *out, Ciphertext output. Encrypt in-place is allowed. |
| * const u8 *in, Plaintext input |
| * unsigned long plaintext_len, Length of data in bytes for encryption. |
| * u8 *iv, Pre-counter block j0: 4 byte salt (from Security Association) |
| * concatenated with 8 byte Initialisation Vector (from IPSec ESP |
| * Payload) concatenated with 0x00000001. 16-byte aligned pointer. |
| * u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary. |
| * const u8 *aad, Additional Authentication Data (AAD) |
| * unsigned long aad_len, Length of AAD in bytes. With RFC4106 this |
| * is going to be 8 or 12 bytes |
| * u8 *auth_tag, Authenticated Tag output. |
| * unsigned long auth_tag_len), Authenticated Tag Length in bytes. |
| * Valid values are 16 (most likely), 12 or 8. |
| */ |
| asmlinkage void aesni_gcm_enc(void *ctx, u8 *out, |
| const u8 *in, unsigned long plaintext_len, u8 *iv, |
| u8 *hash_subkey, const u8 *aad, unsigned long aad_len, |
| u8 *auth_tag, unsigned long auth_tag_len); |
| |
| /* asmlinkage void aesni_gcm_dec() |
| * void *ctx, AES Key schedule. Starts on a 16 byte boundary. |
| * u8 *out, Plaintext output. Decrypt in-place is allowed. |
| * const u8 *in, Ciphertext input |
| * unsigned long ciphertext_len, Length of data in bytes for decryption. |
| * u8 *iv, Pre-counter block j0: 4 byte salt (from Security Association) |
| * concatenated with 8 byte Initialisation Vector (from IPSec ESP |
| * Payload) concatenated with 0x00000001. 16-byte aligned pointer. |
| * u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary. |
| * const u8 *aad, Additional Authentication Data (AAD) |
| * unsigned long aad_len, Length of AAD in bytes. With RFC4106 this is going |
| * to be 8 or 12 bytes |
| * u8 *auth_tag, Authenticated Tag output. |
| * unsigned long auth_tag_len) Authenticated Tag Length in bytes. |
| * Valid values are 16 (most likely), 12 or 8. |
| */ |
| asmlinkage void aesni_gcm_dec(void *ctx, u8 *out, |
| const u8 *in, unsigned long ciphertext_len, u8 *iv, |
| u8 *hash_subkey, const u8 *aad, unsigned long aad_len, |
| u8 *auth_tag, unsigned long auth_tag_len); |
| |
| |
| #ifdef CONFIG_AS_AVX |
| /* |
| * asmlinkage void aesni_gcm_precomp_avx_gen2() |
| * gcm_data *my_ctx_data, context data |
| * u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary. |
| */ |
| asmlinkage void aesni_gcm_precomp_avx_gen2(void *my_ctx_data, u8 *hash_subkey); |
| |
| asmlinkage void aesni_gcm_enc_avx_gen2(void *ctx, u8 *out, |
| const u8 *in, unsigned long plaintext_len, u8 *iv, |
| const u8 *aad, unsigned long aad_len, |
| u8 *auth_tag, unsigned long auth_tag_len); |
| |
| asmlinkage void aesni_gcm_dec_avx_gen2(void *ctx, u8 *out, |
| const u8 *in, unsigned long ciphertext_len, u8 *iv, |
| const u8 *aad, unsigned long aad_len, |
| u8 *auth_tag, unsigned long auth_tag_len); |
| |
| static void aesni_gcm_enc_avx(void *ctx, u8 *out, |
| const u8 *in, unsigned long plaintext_len, u8 *iv, |
| u8 *hash_subkey, const u8 *aad, unsigned long aad_len, |
| u8 *auth_tag, unsigned long auth_tag_len) |
| { |
| if (plaintext_len < AVX_GEN2_OPTSIZE) { |
| aesni_gcm_enc(ctx, out, in, plaintext_len, iv, hash_subkey, aad, |
| aad_len, auth_tag, auth_tag_len); |
| } else { |
| aesni_gcm_precomp_avx_gen2(ctx, hash_subkey); |
| aesni_gcm_enc_avx_gen2(ctx, out, in, plaintext_len, iv, aad, |
| aad_len, auth_tag, auth_tag_len); |
| } |
| } |
| |
| static void aesni_gcm_dec_avx(void *ctx, u8 *out, |
| const u8 *in, unsigned long ciphertext_len, u8 *iv, |
| u8 *hash_subkey, const u8 *aad, unsigned long aad_len, |
| u8 *auth_tag, unsigned long auth_tag_len) |
| { |
| if (ciphertext_len < AVX_GEN2_OPTSIZE) { |
| aesni_gcm_dec(ctx, out, in, ciphertext_len, iv, hash_subkey, aad, |
| aad_len, auth_tag, auth_tag_len); |
| } else { |
| aesni_gcm_precomp_avx_gen2(ctx, hash_subkey); |
| aesni_gcm_dec_avx_gen2(ctx, out, in, ciphertext_len, iv, aad, |
| aad_len, auth_tag, auth_tag_len); |
| } |
| } |
| #endif |
| |
| #ifdef CONFIG_AS_AVX2 |
| /* |
| * asmlinkage void aesni_gcm_precomp_avx_gen4() |
| * gcm_data *my_ctx_data, context data |
| * u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary. |
| */ |
| asmlinkage void aesni_gcm_precomp_avx_gen4(void *my_ctx_data, u8 *hash_subkey); |
| |
| asmlinkage void aesni_gcm_enc_avx_gen4(void *ctx, u8 *out, |
| const u8 *in, unsigned long plaintext_len, u8 *iv, |
| const u8 *aad, unsigned long aad_len, |
| u8 *auth_tag, unsigned long auth_tag_len); |
| |
| asmlinkage void aesni_gcm_dec_avx_gen4(void *ctx, u8 *out, |
| const u8 *in, unsigned long ciphertext_len, u8 *iv, |
| const u8 *aad, unsigned long aad_len, |
| u8 *auth_tag, unsigned long auth_tag_len); |
| |
| static void aesni_gcm_enc_avx2(void *ctx, u8 *out, |
| const u8 *in, unsigned long plaintext_len, u8 *iv, |
| u8 *hash_subkey, const u8 *aad, unsigned long aad_len, |
| u8 *auth_tag, unsigned long auth_tag_len) |
| { |
| if (plaintext_len < AVX_GEN2_OPTSIZE) { |
| aesni_gcm_enc(ctx, out, in, plaintext_len, iv, hash_subkey, aad, |
| aad_len, auth_tag, auth_tag_len); |
| } else if (plaintext_len < AVX_GEN4_OPTSIZE) { |
| aesni_gcm_precomp_avx_gen2(ctx, hash_subkey); |
| aesni_gcm_enc_avx_gen2(ctx, out, in, plaintext_len, iv, aad, |
| aad_len, auth_tag, auth_tag_len); |
| } else { |
| aesni_gcm_precomp_avx_gen4(ctx, hash_subkey); |
| aesni_gcm_enc_avx_gen4(ctx, out, in, plaintext_len, iv, aad, |
| aad_len, auth_tag, auth_tag_len); |
| } |
| } |
| |
| static void aesni_gcm_dec_avx2(void *ctx, u8 *out, |
| const u8 *in, unsigned long ciphertext_len, u8 *iv, |
| u8 *hash_subkey, const u8 *aad, unsigned long aad_len, |
| u8 *auth_tag, unsigned long auth_tag_len) |
| { |
| if (ciphertext_len < AVX_GEN2_OPTSIZE) { |
| aesni_gcm_dec(ctx, out, in, ciphertext_len, iv, hash_subkey, |
| aad, aad_len, auth_tag, auth_tag_len); |
| } else if (ciphertext_len < AVX_GEN4_OPTSIZE) { |
| aesni_gcm_precomp_avx_gen2(ctx, hash_subkey); |
| aesni_gcm_dec_avx_gen2(ctx, out, in, ciphertext_len, iv, aad, |
| aad_len, auth_tag, auth_tag_len); |
| } else { |
| aesni_gcm_precomp_avx_gen4(ctx, hash_subkey); |
| aesni_gcm_dec_avx_gen4(ctx, out, in, ciphertext_len, iv, aad, |
| aad_len, auth_tag, auth_tag_len); |
| } |
| } |
| #endif |
| |
| static void (*aesni_gcm_enc_tfm)(void *ctx, u8 *out, |
| const u8 *in, unsigned long plaintext_len, u8 *iv, |
| u8 *hash_subkey, const u8 *aad, unsigned long aad_len, |
| u8 *auth_tag, unsigned long auth_tag_len); |
| |
| static void (*aesni_gcm_dec_tfm)(void *ctx, u8 *out, |
| const u8 *in, unsigned long ciphertext_len, u8 *iv, |
| u8 *hash_subkey, const u8 *aad, unsigned long aad_len, |
| u8 *auth_tag, unsigned long auth_tag_len); |
| |
| static inline struct |
| aesni_rfc4106_gcm_ctx *aesni_rfc4106_gcm_ctx_get(struct crypto_aead *tfm) |
| { |
| return |
| (struct aesni_rfc4106_gcm_ctx *) |
| PTR_ALIGN((u8 *) |
| crypto_tfm_ctx(crypto_aead_tfm(tfm)), AESNI_ALIGN); |
| } |
| #endif |
| |
| static inline struct crypto_aes_ctx *aes_ctx(void *raw_ctx) |
| { |
| unsigned long addr = (unsigned long)raw_ctx; |
| unsigned long align = AESNI_ALIGN; |
| |
| if (align <= crypto_tfm_ctx_alignment()) |
| align = 1; |
| return (struct crypto_aes_ctx *)ALIGN(addr, align); |
| } |
| |
| static int aes_set_key_common(struct crypto_tfm *tfm, void *raw_ctx, |
| const u8 *in_key, unsigned int key_len) |
| { |
| struct crypto_aes_ctx *ctx = aes_ctx(raw_ctx); |
| u32 *flags = &tfm->crt_flags; |
| int err; |
| |
| if (key_len != AES_KEYSIZE_128 && key_len != AES_KEYSIZE_192 && |
| key_len != AES_KEYSIZE_256) { |
| *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; |
| return -EINVAL; |
| } |
| |
| if (!irq_fpu_usable()) |
| err = crypto_aes_expand_key(ctx, in_key, key_len); |
| else { |
| kernel_fpu_begin(); |
| err = aesni_set_key(ctx, in_key, key_len); |
| kernel_fpu_end(); |
| } |
| |
| return err; |
| } |
| |
| static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key, |
| unsigned int key_len) |
| { |
| return aes_set_key_common(tfm, crypto_tfm_ctx(tfm), in_key, key_len); |
| } |
| |
| static void aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) |
| { |
| struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm)); |
| |
| if (!irq_fpu_usable()) |
| crypto_aes_encrypt_x86(ctx, dst, src); |
| else { |
| kernel_fpu_begin(); |
| aesni_enc(ctx, dst, src); |
| kernel_fpu_end(); |
| } |
| } |
| |
| static void aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) |
| { |
| struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm)); |
| |
| if (!irq_fpu_usable()) |
| crypto_aes_decrypt_x86(ctx, dst, src); |
| else { |
| kernel_fpu_begin(); |
| aesni_dec(ctx, dst, src); |
| kernel_fpu_end(); |
| } |
| } |
| |
| static void __aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) |
| { |
| struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm)); |
| |
| aesni_enc(ctx, dst, src); |
| } |
| |
| static void __aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) |
| { |
| struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm)); |
| |
| aesni_dec(ctx, dst, src); |
| } |
| |
| static int ecb_encrypt(struct blkcipher_desc *desc, |
| struct scatterlist *dst, struct scatterlist *src, |
| unsigned int nbytes) |
| { |
| struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm)); |
| struct blkcipher_walk walk; |
| int err; |
| |
| blkcipher_walk_init(&walk, dst, src, nbytes); |
| err = blkcipher_walk_virt(desc, &walk); |
| desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| |
| kernel_fpu_begin(); |
| while ((nbytes = walk.nbytes)) { |
| aesni_ecb_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr, |
| nbytes & AES_BLOCK_MASK); |
| nbytes &= AES_BLOCK_SIZE - 1; |
| err = blkcipher_walk_done(desc, &walk, nbytes); |
| } |
| kernel_fpu_end(); |
| |
| return err; |
| } |
| |
| static int ecb_decrypt(struct blkcipher_desc *desc, |
| struct scatterlist *dst, struct scatterlist *src, |
| unsigned int nbytes) |
| { |
| struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm)); |
| struct blkcipher_walk walk; |
| int err; |
| |
| blkcipher_walk_init(&walk, dst, src, nbytes); |
| err = blkcipher_walk_virt(desc, &walk); |
| desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| |
| kernel_fpu_begin(); |
| while ((nbytes = walk.nbytes)) { |
| aesni_ecb_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr, |
| nbytes & AES_BLOCK_MASK); |
| nbytes &= AES_BLOCK_SIZE - 1; |
| err = blkcipher_walk_done(desc, &walk, nbytes); |
| } |
| kernel_fpu_end(); |
| |
| return err; |
| } |
| |
| static int cbc_encrypt(struct blkcipher_desc *desc, |
| struct scatterlist *dst, struct scatterlist *src, |
| unsigned int nbytes) |
| { |
| struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm)); |
| struct blkcipher_walk walk; |
| int err; |
| |
| blkcipher_walk_init(&walk, dst, src, nbytes); |
| err = blkcipher_walk_virt(desc, &walk); |
| desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| |
| kernel_fpu_begin(); |
| while ((nbytes = walk.nbytes)) { |
| aesni_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr, |
| nbytes & AES_BLOCK_MASK, walk.iv); |
| nbytes &= AES_BLOCK_SIZE - 1; |
| err = blkcipher_walk_done(desc, &walk, nbytes); |
| } |
| kernel_fpu_end(); |
| |
| return err; |
| } |
| |
| static int cbc_decrypt(struct blkcipher_desc *desc, |
| struct scatterlist *dst, struct scatterlist *src, |
| unsigned int nbytes) |
| { |
| struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm)); |
| struct blkcipher_walk walk; |
| int err; |
| |
| blkcipher_walk_init(&walk, dst, src, nbytes); |
| err = blkcipher_walk_virt(desc, &walk); |
| desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| |
| kernel_fpu_begin(); |
| while ((nbytes = walk.nbytes)) { |
| aesni_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr, |
| nbytes & AES_BLOCK_MASK, walk.iv); |
| nbytes &= AES_BLOCK_SIZE - 1; |
| err = blkcipher_walk_done(desc, &walk, nbytes); |
| } |
| kernel_fpu_end(); |
| |
| return err; |
| } |
| |
| #ifdef CONFIG_X86_64 |
| static void ctr_crypt_final(struct crypto_aes_ctx *ctx, |
| struct blkcipher_walk *walk) |
| { |
| u8 *ctrblk = walk->iv; |
| u8 keystream[AES_BLOCK_SIZE]; |
| u8 *src = walk->src.virt.addr; |
| u8 *dst = walk->dst.virt.addr; |
| unsigned int nbytes = walk->nbytes; |
| |
| aesni_enc(ctx, keystream, ctrblk); |
| crypto_xor(keystream, src, nbytes); |
| memcpy(dst, keystream, nbytes); |
| crypto_inc(ctrblk, AES_BLOCK_SIZE); |
| } |
| |
| static int ctr_crypt(struct blkcipher_desc *desc, |
| struct scatterlist *dst, struct scatterlist *src, |
| unsigned int nbytes) |
| { |
| struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm)); |
| struct blkcipher_walk walk; |
| int err; |
| |
| blkcipher_walk_init(&walk, dst, src, nbytes); |
| err = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE); |
| desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| |
| kernel_fpu_begin(); |
| while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) { |
| aesni_ctr_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr, |
| nbytes & AES_BLOCK_MASK, walk.iv); |
| nbytes &= AES_BLOCK_SIZE - 1; |
| err = blkcipher_walk_done(desc, &walk, nbytes); |
| } |
| if (walk.nbytes) { |
| ctr_crypt_final(ctx, &walk); |
| err = blkcipher_walk_done(desc, &walk, 0); |
| } |
| kernel_fpu_end(); |
| |
| return err; |
| } |
| #endif |
| |
| static int ablk_ecb_init(struct crypto_tfm *tfm) |
| { |
| return ablk_init_common(tfm, "__driver-ecb-aes-aesni"); |
| } |
| |
| static int ablk_cbc_init(struct crypto_tfm *tfm) |
| { |
| return ablk_init_common(tfm, "__driver-cbc-aes-aesni"); |
| } |
| |
| #ifdef CONFIG_X86_64 |
| static int ablk_ctr_init(struct crypto_tfm *tfm) |
| { |
| return ablk_init_common(tfm, "__driver-ctr-aes-aesni"); |
| } |
| |
| #endif |
| |
| #ifdef HAS_PCBC |
| static int ablk_pcbc_init(struct crypto_tfm *tfm) |
| { |
| return ablk_init_common(tfm, "fpu(pcbc(__driver-aes-aesni))"); |
| } |
| #endif |
| |
| static void lrw_xts_encrypt_callback(void *ctx, u8 *blks, unsigned int nbytes) |
| { |
| aesni_ecb_enc(ctx, blks, blks, nbytes); |
| } |
| |
| static void lrw_xts_decrypt_callback(void *ctx, u8 *blks, unsigned int nbytes) |
| { |
| aesni_ecb_dec(ctx, blks, blks, nbytes); |
| } |
| |
| static int lrw_aesni_setkey(struct crypto_tfm *tfm, const u8 *key, |
| unsigned int keylen) |
| { |
| struct aesni_lrw_ctx *ctx = crypto_tfm_ctx(tfm); |
| int err; |
| |
| err = aes_set_key_common(tfm, ctx->raw_aes_ctx, key, |
| keylen - AES_BLOCK_SIZE); |
| if (err) |
| return err; |
| |
| return lrw_init_table(&ctx->lrw_table, key + keylen - AES_BLOCK_SIZE); |
| } |
| |
| static void lrw_aesni_exit_tfm(struct crypto_tfm *tfm) |
| { |
| struct aesni_lrw_ctx *ctx = crypto_tfm_ctx(tfm); |
| |
| lrw_free_table(&ctx->lrw_table); |
| } |
| |
| static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| struct scatterlist *src, unsigned int nbytes) |
| { |
| struct aesni_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| be128 buf[8]; |
| struct lrw_crypt_req req = { |
| .tbuf = buf, |
| .tbuflen = sizeof(buf), |
| |
| .table_ctx = &ctx->lrw_table, |
| .crypt_ctx = aes_ctx(ctx->raw_aes_ctx), |
| .crypt_fn = lrw_xts_encrypt_callback, |
| }; |
| int ret; |
| |
| desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| |
| kernel_fpu_begin(); |
| ret = lrw_crypt(desc, dst, src, nbytes, &req); |
| kernel_fpu_end(); |
| |
| return ret; |
| } |
| |
| static int lrw_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| struct scatterlist *src, unsigned int nbytes) |
| { |
| struct aesni_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| be128 buf[8]; |
| struct lrw_crypt_req req = { |
| .tbuf = buf, |
| .tbuflen = sizeof(buf), |
| |
| .table_ctx = &ctx->lrw_table, |
| .crypt_ctx = aes_ctx(ctx->raw_aes_ctx), |
| .crypt_fn = lrw_xts_decrypt_callback, |
| }; |
| int ret; |
| |
| desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| |
| kernel_fpu_begin(); |
| ret = lrw_crypt(desc, dst, src, nbytes, &req); |
| kernel_fpu_end(); |
| |
| return ret; |
| } |
| |
| static int xts_aesni_setkey(struct crypto_tfm *tfm, const u8 *key, |
| unsigned int keylen) |
| { |
| struct aesni_xts_ctx *ctx = crypto_tfm_ctx(tfm); |
| u32 *flags = &tfm->crt_flags; |
| int err; |
| |
| /* key consists of keys of equal size concatenated, therefore |
| * the length must be even |
| */ |
| if (keylen % 2) { |
| *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; |
| return -EINVAL; |
| } |
| |
| /* first half of xts-key is for crypt */ |
| err = aes_set_key_common(tfm, ctx->raw_crypt_ctx, key, keylen / 2); |
| if (err) |
| return err; |
| |
| /* second half of xts-key is for tweak */ |
| return aes_set_key_common(tfm, ctx->raw_tweak_ctx, key + keylen / 2, |
| keylen / 2); |
| } |
| |
| |
| static void aesni_xts_tweak(void *ctx, u8 *out, const u8 *in) |
| { |
| aesni_enc(ctx, out, in); |
| } |
| |
| #ifdef CONFIG_X86_64 |
| |
| static void aesni_xts_enc(void *ctx, u128 *dst, const u128 *src, le128 *iv) |
| { |
| glue_xts_crypt_128bit_one(ctx, dst, src, iv, GLUE_FUNC_CAST(aesni_enc)); |
| } |
| |
| static void aesni_xts_dec(void *ctx, u128 *dst, const u128 *src, le128 *iv) |
| { |
| glue_xts_crypt_128bit_one(ctx, dst, src, iv, GLUE_FUNC_CAST(aesni_dec)); |
| } |
| |
| static void aesni_xts_enc8(void *ctx, u128 *dst, const u128 *src, le128 *iv) |
| { |
| aesni_xts_crypt8(ctx, (u8 *)dst, (const u8 *)src, true, (u8 *)iv); |
| } |
| |
| static void aesni_xts_dec8(void *ctx, u128 *dst, const u128 *src, le128 *iv) |
| { |
| aesni_xts_crypt8(ctx, (u8 *)dst, (const u8 *)src, false, (u8 *)iv); |
| } |
| |
| static const struct common_glue_ctx aesni_enc_xts = { |
| .num_funcs = 2, |
| .fpu_blocks_limit = 1, |
| |
| .funcs = { { |
| .num_blocks = 8, |
| .fn_u = { .xts = GLUE_XTS_FUNC_CAST(aesni_xts_enc8) } |
| }, { |
| .num_blocks = 1, |
| .fn_u = { .xts = GLUE_XTS_FUNC_CAST(aesni_xts_enc) } |
| } } |
| }; |
| |
| static const struct common_glue_ctx aesni_dec_xts = { |
| .num_funcs = 2, |
| .fpu_blocks_limit = 1, |
| |
| .funcs = { { |
| .num_blocks = 8, |
| .fn_u = { .xts = GLUE_XTS_FUNC_CAST(aesni_xts_dec8) } |
| }, { |
| .num_blocks = 1, |
| .fn_u = { .xts = GLUE_XTS_FUNC_CAST(aesni_xts_dec) } |
| } } |
| }; |
| |
| static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| struct scatterlist *src, unsigned int nbytes) |
| { |
| struct aesni_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| |
| return glue_xts_crypt_128bit(&aesni_enc_xts, desc, dst, src, nbytes, |
| XTS_TWEAK_CAST(aesni_xts_tweak), |
| aes_ctx(ctx->raw_tweak_ctx), |
| aes_ctx(ctx->raw_crypt_ctx)); |
| } |
| |
| static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| struct scatterlist *src, unsigned int nbytes) |
| { |
| struct aesni_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| |
| return glue_xts_crypt_128bit(&aesni_dec_xts, desc, dst, src, nbytes, |
| XTS_TWEAK_CAST(aesni_xts_tweak), |
| aes_ctx(ctx->raw_tweak_ctx), |
| aes_ctx(ctx->raw_crypt_ctx)); |
| } |
| |
| #else |
| |
| static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| struct scatterlist *src, unsigned int nbytes) |
| { |
| struct aesni_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| be128 buf[8]; |
| struct xts_crypt_req req = { |
| .tbuf = buf, |
| .tbuflen = sizeof(buf), |
| |
| .tweak_ctx = aes_ctx(ctx->raw_tweak_ctx), |
| .tweak_fn = aesni_xts_tweak, |
| .crypt_ctx = aes_ctx(ctx->raw_crypt_ctx), |
| .crypt_fn = lrw_xts_encrypt_callback, |
| }; |
| int ret; |
| |
| desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| |
| kernel_fpu_begin(); |
| ret = xts_crypt(desc, dst, src, nbytes, &req); |
| kernel_fpu_end(); |
| |
| return ret; |
| } |
| |
| static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| struct scatterlist *src, unsigned int nbytes) |
| { |
| struct aesni_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| be128 buf[8]; |
| struct xts_crypt_req req = { |
| .tbuf = buf, |
| .tbuflen = sizeof(buf), |
| |
| .tweak_ctx = aes_ctx(ctx->raw_tweak_ctx), |
| .tweak_fn = aesni_xts_tweak, |
| .crypt_ctx = aes_ctx(ctx->raw_crypt_ctx), |
| .crypt_fn = lrw_xts_decrypt_callback, |
| }; |
| int ret; |
| |
| desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| |
| kernel_fpu_begin(); |
| ret = xts_crypt(desc, dst, src, nbytes, &req); |
| kernel_fpu_end(); |
| |
| return ret; |
| } |
| |
| #endif |
| |
| #ifdef CONFIG_X86_64 |
| static int rfc4106_init(struct crypto_tfm *tfm) |
| { |
| struct cryptd_aead *cryptd_tfm; |
| struct aesni_rfc4106_gcm_ctx *ctx = (struct aesni_rfc4106_gcm_ctx *) |
| PTR_ALIGN((u8 *)crypto_tfm_ctx(tfm), AESNI_ALIGN); |
| struct crypto_aead *cryptd_child; |
| struct aesni_rfc4106_gcm_ctx *child_ctx; |
| cryptd_tfm = cryptd_alloc_aead("__driver-gcm-aes-aesni", 0, 0); |
| if (IS_ERR(cryptd_tfm)) |
| return PTR_ERR(cryptd_tfm); |
| |
| cryptd_child = cryptd_aead_child(cryptd_tfm); |
| child_ctx = aesni_rfc4106_gcm_ctx_get(cryptd_child); |
| memcpy(child_ctx, ctx, sizeof(*ctx)); |
| ctx->cryptd_tfm = cryptd_tfm; |
| tfm->crt_aead.reqsize = sizeof(struct aead_request) |
| + crypto_aead_reqsize(&cryptd_tfm->base); |
| return 0; |
| } |
| |
| static void rfc4106_exit(struct crypto_tfm *tfm) |
| { |
| struct aesni_rfc4106_gcm_ctx *ctx = |
| (struct aesni_rfc4106_gcm_ctx *) |
| PTR_ALIGN((u8 *)crypto_tfm_ctx(tfm), AESNI_ALIGN); |
| if (!IS_ERR(ctx->cryptd_tfm)) |
| cryptd_free_aead(ctx->cryptd_tfm); |
| return; |
| } |
| |
| static void |
| rfc4106_set_hash_subkey_done(struct crypto_async_request *req, int err) |
| { |
| struct aesni_gcm_set_hash_subkey_result *result = req->data; |
| |
| if (err == -EINPROGRESS) |
| return; |
| result->err = err; |
| complete(&result->completion); |
| } |
| |
| static int |
| rfc4106_set_hash_subkey(u8 *hash_subkey, const u8 *key, unsigned int key_len) |
| { |
| struct crypto_ablkcipher *ctr_tfm; |
| struct ablkcipher_request *req; |
| int ret = -EINVAL; |
| struct aesni_hash_subkey_req_data *req_data; |
| |
| ctr_tfm = crypto_alloc_ablkcipher("ctr(aes)", 0, 0); |
| if (IS_ERR(ctr_tfm)) |
| return PTR_ERR(ctr_tfm); |
| |
| crypto_ablkcipher_clear_flags(ctr_tfm, ~0); |
| |
| ret = crypto_ablkcipher_setkey(ctr_tfm, key, key_len); |
| if (ret) |
| goto out_free_ablkcipher; |
| |
| ret = -ENOMEM; |
| req = ablkcipher_request_alloc(ctr_tfm, GFP_KERNEL); |
| if (!req) |
| goto out_free_ablkcipher; |
| |
| req_data = kmalloc(sizeof(*req_data), GFP_KERNEL); |
| if (!req_data) |
| goto out_free_request; |
| |
| memset(req_data->iv, 0, sizeof(req_data->iv)); |
| |
| /* Clear the data in the hash sub key container to zero.*/ |
| /* We want to cipher all zeros to create the hash sub key. */ |
| memset(hash_subkey, 0, RFC4106_HASH_SUBKEY_SIZE); |
| |
| init_completion(&req_data->result.completion); |
| sg_init_one(&req_data->sg, hash_subkey, RFC4106_HASH_SUBKEY_SIZE); |
| ablkcipher_request_set_tfm(req, ctr_tfm); |
| ablkcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP | |
| CRYPTO_TFM_REQ_MAY_BACKLOG, |
| rfc4106_set_hash_subkey_done, |
| &req_data->result); |
| |
| ablkcipher_request_set_crypt(req, &req_data->sg, |
| &req_data->sg, RFC4106_HASH_SUBKEY_SIZE, req_data->iv); |
| |
| ret = crypto_ablkcipher_encrypt(req); |
| if (ret == -EINPROGRESS || ret == -EBUSY) { |
| ret = wait_for_completion_interruptible |
| (&req_data->result.completion); |
| if (!ret) |
| ret = req_data->result.err; |
| } |
| kfree(req_data); |
| out_free_request: |
| ablkcipher_request_free(req); |
| out_free_ablkcipher: |
| crypto_free_ablkcipher(ctr_tfm); |
| return ret; |
| } |
| |
| static int rfc4106_set_key(struct crypto_aead *parent, const u8 *key, |
| unsigned int key_len) |
| { |
| int ret = 0; |
| struct crypto_tfm *tfm = crypto_aead_tfm(parent); |
| struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(parent); |
| struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm); |
| struct aesni_rfc4106_gcm_ctx *child_ctx = |
| aesni_rfc4106_gcm_ctx_get(cryptd_child); |
| u8 *new_key_align, *new_key_mem = NULL; |
| |
| if (key_len < 4) { |
| crypto_tfm_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); |
| return -EINVAL; |
| } |
| /*Account for 4 byte nonce at the end.*/ |
| key_len -= 4; |
| if (key_len != AES_KEYSIZE_128) { |
| crypto_tfm_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); |
| return -EINVAL; |
| } |
| |
| memcpy(ctx->nonce, key + key_len, sizeof(ctx->nonce)); |
| /*This must be on a 16 byte boundary!*/ |
| if ((unsigned long)(&(ctx->aes_key_expanded.key_enc[0])) % AESNI_ALIGN) |
| return -EINVAL; |
| |
| if ((unsigned long)key % AESNI_ALIGN) { |
| /*key is not aligned: use an auxuliar aligned pointer*/ |
| new_key_mem = kmalloc(key_len+AESNI_ALIGN, GFP_KERNEL); |
| if (!new_key_mem) |
| return -ENOMEM; |
| |
| new_key_align = PTR_ALIGN(new_key_mem, AESNI_ALIGN); |
| memcpy(new_key_align, key, key_len); |
| key = new_key_align; |
| } |
| |
| if (!irq_fpu_usable()) |
| ret = crypto_aes_expand_key(&(ctx->aes_key_expanded), |
| key, key_len); |
| else { |
| kernel_fpu_begin(); |
| ret = aesni_set_key(&(ctx->aes_key_expanded), key, key_len); |
| kernel_fpu_end(); |
| } |
| /*This must be on a 16 byte boundary!*/ |
| if ((unsigned long)(&(ctx->hash_subkey[0])) % AESNI_ALIGN) { |
| ret = -EINVAL; |
| goto exit; |
| } |
| ret = rfc4106_set_hash_subkey(ctx->hash_subkey, key, key_len); |
| memcpy(child_ctx, ctx, sizeof(*ctx)); |
| exit: |
| kfree(new_key_mem); |
| return ret; |
| } |
| |
| /* This is the Integrity Check Value (aka the authentication tag length and can |
| * be 8, 12 or 16 bytes long. */ |
| static int rfc4106_set_authsize(struct crypto_aead *parent, |
| unsigned int authsize) |
| { |
| struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(parent); |
| struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm); |
| |
| switch (authsize) { |
| case 8: |
| case 12: |
| case 16: |
| break; |
| default: |
| return -EINVAL; |
| } |
| crypto_aead_crt(parent)->authsize = authsize; |
| crypto_aead_crt(cryptd_child)->authsize = authsize; |
| return 0; |
| } |
| |
| static int rfc4106_encrypt(struct aead_request *req) |
| { |
| int ret; |
| struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
| struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm); |
| |
| if (!irq_fpu_usable()) { |
| struct aead_request *cryptd_req = |
| (struct aead_request *) aead_request_ctx(req); |
| memcpy(cryptd_req, req, sizeof(*req)); |
| aead_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base); |
| return crypto_aead_encrypt(cryptd_req); |
| } else { |
| struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm); |
| kernel_fpu_begin(); |
| ret = cryptd_child->base.crt_aead.encrypt(req); |
| kernel_fpu_end(); |
| return ret; |
| } |
| } |
| |
| static int rfc4106_decrypt(struct aead_request *req) |
| { |
| int ret; |
| struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
| struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm); |
| |
| if (!irq_fpu_usable()) { |
| struct aead_request *cryptd_req = |
| (struct aead_request *) aead_request_ctx(req); |
| memcpy(cryptd_req, req, sizeof(*req)); |
| aead_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base); |
| return crypto_aead_decrypt(cryptd_req); |
| } else { |
| struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm); |
| kernel_fpu_begin(); |
| ret = cryptd_child->base.crt_aead.decrypt(req); |
| kernel_fpu_end(); |
| return ret; |
| } |
| } |
| |
| static int __driver_rfc4106_encrypt(struct aead_request *req) |
| { |
| u8 one_entry_in_sg = 0; |
| u8 *src, *dst, *assoc; |
| __be32 counter = cpu_to_be32(1); |
| struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
| struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm); |
| void *aes_ctx = &(ctx->aes_key_expanded); |
| unsigned long auth_tag_len = crypto_aead_authsize(tfm); |
| u8 iv_tab[16+AESNI_ALIGN]; |
| u8* iv = (u8 *) PTR_ALIGN((u8 *)iv_tab, AESNI_ALIGN); |
| struct scatter_walk src_sg_walk; |
| struct scatter_walk assoc_sg_walk; |
| struct scatter_walk dst_sg_walk; |
| unsigned int i; |
| |
| /* Assuming we are supporting rfc4106 64-bit extended */ |
| /* sequence numbers We need to have the AAD length equal */ |
| /* to 8 or 12 bytes */ |
| if (unlikely(req->assoclen != 8 && req->assoclen != 12)) |
| return -EINVAL; |
| /* IV below built */ |
| for (i = 0; i < 4; i++) |
| *(iv+i) = ctx->nonce[i]; |
| for (i = 0; i < 8; i++) |
| *(iv+4+i) = req->iv[i]; |
| *((__be32 *)(iv+12)) = counter; |
| |
| if ((sg_is_last(req->src)) && (sg_is_last(req->assoc))) { |
| one_entry_in_sg = 1; |
| scatterwalk_start(&src_sg_walk, req->src); |
| scatterwalk_start(&assoc_sg_walk, req->assoc); |
| src = scatterwalk_map(&src_sg_walk); |
| assoc = scatterwalk_map(&assoc_sg_walk); |
| dst = src; |
| if (unlikely(req->src != req->dst)) { |
| scatterwalk_start(&dst_sg_walk, req->dst); |
| dst = scatterwalk_map(&dst_sg_walk); |
| } |
| |
| } else { |
| /* Allocate memory for src, dst, assoc */ |
| src = kmalloc(req->cryptlen + auth_tag_len + req->assoclen, |
| GFP_ATOMIC); |
| if (unlikely(!src)) |
| return -ENOMEM; |
| assoc = (src + req->cryptlen + auth_tag_len); |
| scatterwalk_map_and_copy(src, req->src, 0, req->cryptlen, 0); |
| scatterwalk_map_and_copy(assoc, req->assoc, 0, |
| req->assoclen, 0); |
| dst = src; |
| } |
| |
| aesni_gcm_enc_tfm(aes_ctx, dst, src, (unsigned long)req->cryptlen, iv, |
| ctx->hash_subkey, assoc, (unsigned long)req->assoclen, dst |
| + ((unsigned long)req->cryptlen), auth_tag_len); |
| |
| /* The authTag (aka the Integrity Check Value) needs to be written |
| * back to the packet. */ |
| if (one_entry_in_sg) { |
| if (unlikely(req->src != req->dst)) { |
| scatterwalk_unmap(dst); |
| scatterwalk_done(&dst_sg_walk, 0, 0); |
| } |
| scatterwalk_unmap(src); |
| scatterwalk_unmap(assoc); |
| scatterwalk_done(&src_sg_walk, 0, 0); |
| scatterwalk_done(&assoc_sg_walk, 0, 0); |
| } else { |
| scatterwalk_map_and_copy(dst, req->dst, 0, |
| req->cryptlen + auth_tag_len, 1); |
| kfree(src); |
| } |
| return 0; |
| } |
| |
| static int __driver_rfc4106_decrypt(struct aead_request *req) |
| { |
| u8 one_entry_in_sg = 0; |
| u8 *src, *dst, *assoc; |
| unsigned long tempCipherLen = 0; |
| __be32 counter = cpu_to_be32(1); |
| int retval = 0; |
| struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
| struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm); |
| void *aes_ctx = &(ctx->aes_key_expanded); |
| unsigned long auth_tag_len = crypto_aead_authsize(tfm); |
| u8 iv_and_authTag[32+AESNI_ALIGN]; |
| u8 *iv = (u8 *) PTR_ALIGN((u8 *)iv_and_authTag, AESNI_ALIGN); |
| u8 *authTag = iv + 16; |
| struct scatter_walk src_sg_walk; |
| struct scatter_walk assoc_sg_walk; |
| struct scatter_walk dst_sg_walk; |
| unsigned int i; |
| |
| if (unlikely((req->cryptlen < auth_tag_len) || |
| (req->assoclen != 8 && req->assoclen != 12))) |
| return -EINVAL; |
| /* Assuming we are supporting rfc4106 64-bit extended */ |
| /* sequence numbers We need to have the AAD length */ |
| /* equal to 8 or 12 bytes */ |
| |
| tempCipherLen = (unsigned long)(req->cryptlen - auth_tag_len); |
| /* IV below built */ |
| for (i = 0; i < 4; i++) |
| *(iv+i) = ctx->nonce[i]; |
| for (i = 0; i < 8; i++) |
| *(iv+4+i) = req->iv[i]; |
| *((__be32 *)(iv+12)) = counter; |
| |
| if ((sg_is_last(req->src)) && (sg_is_last(req->assoc))) { |
| one_entry_in_sg = 1; |
| scatterwalk_start(&src_sg_walk, req->src); |
| scatterwalk_start(&assoc_sg_walk, req->assoc); |
| src = scatterwalk_map(&src_sg_walk); |
| assoc = scatterwalk_map(&assoc_sg_walk); |
| dst = src; |
| if (unlikely(req->src != req->dst)) { |
| scatterwalk_start(&dst_sg_walk, req->dst); |
| dst = scatterwalk_map(&dst_sg_walk); |
| } |
| |
| } else { |
| /* Allocate memory for src, dst, assoc */ |
| src = kmalloc(req->cryptlen + req->assoclen, GFP_ATOMIC); |
| if (!src) |
| return -ENOMEM; |
| assoc = (src + req->cryptlen + auth_tag_len); |
| scatterwalk_map_and_copy(src, req->src, 0, req->cryptlen, 0); |
| scatterwalk_map_and_copy(assoc, req->assoc, 0, |
| req->assoclen, 0); |
| dst = src; |
| } |
| |
| aesni_gcm_dec_tfm(aes_ctx, dst, src, tempCipherLen, iv, |
| ctx->hash_subkey, assoc, (unsigned long)req->assoclen, |
| authTag, auth_tag_len); |
| |
| /* Compare generated tag with passed in tag. */ |
| retval = crypto_memneq(src + tempCipherLen, authTag, auth_tag_len) ? |
| -EBADMSG : 0; |
| |
| if (one_entry_in_sg) { |
| if (unlikely(req->src != req->dst)) { |
| scatterwalk_unmap(dst); |
| scatterwalk_done(&dst_sg_walk, 0, 0); |
| } |
| scatterwalk_unmap(src); |
| scatterwalk_unmap(assoc); |
| scatterwalk_done(&src_sg_walk, 0, 0); |
| scatterwalk_done(&assoc_sg_walk, 0, 0); |
| } else { |
| scatterwalk_map_and_copy(dst, req->dst, 0, req->cryptlen, 1); |
| kfree(src); |
| } |
| return retval; |
| } |
| #endif |
| |
| static struct crypto_alg aesni_algs[] = { { |
| .cra_name = "aes", |
| .cra_driver_name = "aes-aesni", |
| .cra_priority = 300, |
| .cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
| .cra_blocksize = AES_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct crypto_aes_ctx) + |
| AESNI_ALIGN - 1, |
| .cra_alignmask = 0, |
| .cra_module = THIS_MODULE, |
| .cra_u = { |
| .cipher = { |
| .cia_min_keysize = AES_MIN_KEY_SIZE, |
| .cia_max_keysize = AES_MAX_KEY_SIZE, |
| .cia_setkey = aes_set_key, |
| .cia_encrypt = aes_encrypt, |
| .cia_decrypt = aes_decrypt |
| } |
| } |
| }, { |
| .cra_name = "__aes-aesni", |
| .cra_driver_name = "__driver-aes-aesni", |
| .cra_priority = 0, |
| .cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
| .cra_blocksize = AES_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct crypto_aes_ctx) + |
| AESNI_ALIGN - 1, |
| .cra_alignmask = 0, |
| .cra_module = THIS_MODULE, |
| .cra_u = { |
| .cipher = { |
| .cia_min_keysize = AES_MIN_KEY_SIZE, |
| .cia_max_keysize = AES_MAX_KEY_SIZE, |
| .cia_setkey = aes_set_key, |
| .cia_encrypt = __aes_encrypt, |
| .cia_decrypt = __aes_decrypt |
| } |
| } |
| }, { |
| .cra_name = "__ecb-aes-aesni", |
| .cra_driver_name = "__driver-ecb-aes-aesni", |
| .cra_priority = 0, |
| .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| .cra_blocksize = AES_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct crypto_aes_ctx) + |
| AESNI_ALIGN - 1, |
| .cra_alignmask = 0, |
| .cra_type = &crypto_blkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_u = { |
| .blkcipher = { |
| .min_keysize = AES_MIN_KEY_SIZE, |
| .max_keysize = AES_MAX_KEY_SIZE, |
| .setkey = aes_set_key, |
| .encrypt = ecb_encrypt, |
| .decrypt = ecb_decrypt, |
| }, |
| }, |
| }, { |
| .cra_name = "__cbc-aes-aesni", |
| .cra_driver_name = "__driver-cbc-aes-aesni", |
| .cra_priority = 0, |
| .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| .cra_blocksize = AES_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct crypto_aes_ctx) + |
| AESNI_ALIGN - 1, |
| .cra_alignmask = 0, |
| .cra_type = &crypto_blkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_u = { |
| .blkcipher = { |
| .min_keysize = AES_MIN_KEY_SIZE, |
| .max_keysize = AES_MAX_KEY_SIZE, |
| .setkey = aes_set_key, |
| .encrypt = cbc_encrypt, |
| .decrypt = cbc_decrypt, |
| }, |
| }, |
| }, { |
| .cra_name = "ecb(aes)", |
| .cra_driver_name = "ecb-aes-aesni", |
| .cra_priority = 400, |
| .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| .cra_blocksize = AES_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct async_helper_ctx), |
| .cra_alignmask = 0, |
| .cra_type = &crypto_ablkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_init = ablk_ecb_init, |
| .cra_exit = ablk_exit, |
| .cra_u = { |
| .ablkcipher = { |
| .min_keysize = AES_MIN_KEY_SIZE, |
| .max_keysize = AES_MAX_KEY_SIZE, |
| .setkey = ablk_set_key, |
| .encrypt = ablk_encrypt, |
| .decrypt = ablk_decrypt, |
| }, |
| }, |
| }, { |
| .cra_name = "cbc(aes)", |
| .cra_driver_name = "cbc-aes-aesni", |
| .cra_priority = 400, |
| .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| .cra_blocksize = AES_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct async_helper_ctx), |
| .cra_alignmask = 0, |
| .cra_type = &crypto_ablkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_init = ablk_cbc_init, |
| .cra_exit = ablk_exit, |
| .cra_u = { |
| .ablkcipher = { |
| .min_keysize = AES_MIN_KEY_SIZE, |
| .max_keysize = AES_MAX_KEY_SIZE, |
| .ivsize = AES_BLOCK_SIZE, |
| .setkey = ablk_set_key, |
| .encrypt = ablk_encrypt, |
| .decrypt = ablk_decrypt, |
| }, |
| }, |
| #ifdef CONFIG_X86_64 |
| }, { |
| .cra_name = "__ctr-aes-aesni", |
| .cra_driver_name = "__driver-ctr-aes-aesni", |
| .cra_priority = 0, |
| .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| .cra_blocksize = 1, |
| .cra_ctxsize = sizeof(struct crypto_aes_ctx) + |
| AESNI_ALIGN - 1, |
| .cra_alignmask = 0, |
| .cra_type = &crypto_blkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_u = { |
| .blkcipher = { |
| .min_keysize = AES_MIN_KEY_SIZE, |
| .max_keysize = AES_MAX_KEY_SIZE, |
| .ivsize = AES_BLOCK_SIZE, |
| .setkey = aes_set_key, |
| .encrypt = ctr_crypt, |
| .decrypt = ctr_crypt, |
| }, |
| }, |
| }, { |
| .cra_name = "ctr(aes)", |
| .cra_driver_name = "ctr-aes-aesni", |
| .cra_priority = 400, |
| .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| .cra_blocksize = 1, |
| .cra_ctxsize = sizeof(struct async_helper_ctx), |
| .cra_alignmask = 0, |
| .cra_type = &crypto_ablkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_init = ablk_ctr_init, |
| .cra_exit = ablk_exit, |
| .cra_u = { |
| .ablkcipher = { |
| .min_keysize = AES_MIN_KEY_SIZE, |
| .max_keysize = AES_MAX_KEY_SIZE, |
| .ivsize = AES_BLOCK_SIZE, |
| .setkey = ablk_set_key, |
| .encrypt = ablk_encrypt, |
| .decrypt = ablk_encrypt, |
| .geniv = "chainiv", |
| }, |
| }, |
| }, { |
| .cra_name = "__gcm-aes-aesni", |
| .cra_driver_name = "__driver-gcm-aes-aesni", |
| .cra_priority = 0, |
| .cra_flags = CRYPTO_ALG_TYPE_AEAD, |
| .cra_blocksize = 1, |
| .cra_ctxsize = sizeof(struct aesni_rfc4106_gcm_ctx) + |
| AESNI_ALIGN, |
| .cra_alignmask = 0, |
| .cra_type = &crypto_aead_type, |
| .cra_module = THIS_MODULE, |
| .cra_u = { |
| .aead = { |
| .encrypt = __driver_rfc4106_encrypt, |
| .decrypt = __driver_rfc4106_decrypt, |
| }, |
| }, |
| }, { |
| .cra_name = "rfc4106(gcm(aes))", |
| .cra_driver_name = "rfc4106-gcm-aesni", |
| .cra_priority = 400, |
| .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC, |
| .cra_blocksize = 1, |
| .cra_ctxsize = sizeof(struct aesni_rfc4106_gcm_ctx) + |
| AESNI_ALIGN, |
| .cra_alignmask = 0, |
| .cra_type = &crypto_nivaead_type, |
| .cra_module = THIS_MODULE, |
| .cra_init = rfc4106_init, |
| .cra_exit = rfc4106_exit, |
| .cra_u = { |
| .aead = { |
| .setkey = rfc4106_set_key, |
| .setauthsize = rfc4106_set_authsize, |
| .encrypt = rfc4106_encrypt, |
| .decrypt = rfc4106_decrypt, |
| .geniv = "seqiv", |
| .ivsize = 8, |
| .maxauthsize = 16, |
| }, |
| }, |
| #endif |
| #ifdef HAS_PCBC |
| }, { |
| .cra_name = "pcbc(aes)", |
| .cra_driver_name = "pcbc-aes-aesni", |
| .cra_priority = 400, |
| .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| .cra_blocksize = AES_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct async_helper_ctx), |
| .cra_alignmask = 0, |
| .cra_type = &crypto_ablkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_init = ablk_pcbc_init, |
| .cra_exit = ablk_exit, |
| .cra_u = { |
| .ablkcipher = { |
| .min_keysize = AES_MIN_KEY_SIZE, |
| .max_keysize = AES_MAX_KEY_SIZE, |
| .ivsize = AES_BLOCK_SIZE, |
| .setkey = ablk_set_key, |
| .encrypt = ablk_encrypt, |
| .decrypt = ablk_decrypt, |
| }, |
| }, |
| #endif |
| }, { |
| .cra_name = "__lrw-aes-aesni", |
| .cra_driver_name = "__driver-lrw-aes-aesni", |
| .cra_priority = 0, |
| .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| .cra_blocksize = AES_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct aesni_lrw_ctx), |
| .cra_alignmask = 0, |
| .cra_type = &crypto_blkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_exit = lrw_aesni_exit_tfm, |
| .cra_u = { |
| .blkcipher = { |
| .min_keysize = AES_MIN_KEY_SIZE + AES_BLOCK_SIZE, |
| .max_keysize = AES_MAX_KEY_SIZE + AES_BLOCK_SIZE, |
| .ivsize = AES_BLOCK_SIZE, |
| .setkey = lrw_aesni_setkey, |
| .encrypt = lrw_encrypt, |
| .decrypt = lrw_decrypt, |
| }, |
| }, |
| }, { |
| .cra_name = "__xts-aes-aesni", |
| .cra_driver_name = "__driver-xts-aes-aesni", |
| .cra_priority = 0, |
| .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| .cra_blocksize = AES_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct aesni_xts_ctx), |
| .cra_alignmask = 0, |
| .cra_type = &crypto_blkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_u = { |
| .blkcipher = { |
| .min_keysize = 2 * AES_MIN_KEY_SIZE, |
| .max_keysize = 2 * AES_MAX_KEY_SIZE, |
| .ivsize = AES_BLOCK_SIZE, |
| .setkey = xts_aesni_setkey, |
| .encrypt = xts_encrypt, |
| .decrypt = xts_decrypt, |
| }, |
| }, |
| }, { |
| .cra_name = "lrw(aes)", |
| .cra_driver_name = "lrw-aes-aesni", |
| .cra_priority = 400, |
| .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| .cra_blocksize = AES_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct async_helper_ctx), |
| .cra_alignmask = 0, |
| .cra_type = &crypto_ablkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_init = ablk_init, |
| .cra_exit = ablk_exit, |
| .cra_u = { |
| .ablkcipher = { |
| .min_keysize = AES_MIN_KEY_SIZE + AES_BLOCK_SIZE, |
| .max_keysize = AES_MAX_KEY_SIZE + AES_BLOCK_SIZE, |
| .ivsize = AES_BLOCK_SIZE, |
| .setkey = ablk_set_key, |
| .encrypt = ablk_encrypt, |
| .decrypt = ablk_decrypt, |
| }, |
| }, |
| }, { |
| .cra_name = "xts(aes)", |
| .cra_driver_name = "xts-aes-aesni", |
| .cra_priority = 400, |
| .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| .cra_blocksize = AES_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct async_helper_ctx), |
| .cra_alignmask = 0, |
| .cra_type = &crypto_ablkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_init = ablk_init, |
| .cra_exit = ablk_exit, |
| .cra_u = { |
| .ablkcipher = { |
| .min_keysize = 2 * AES_MIN_KEY_SIZE, |
| .max_keysize = 2 * AES_MAX_KEY_SIZE, |
| .ivsize = AES_BLOCK_SIZE, |
| .setkey = ablk_set_key, |
| .encrypt = ablk_encrypt, |
| .decrypt = ablk_decrypt, |
| }, |
| }, |
| } }; |
| |
| |
| static const struct x86_cpu_id aesni_cpu_id[] = { |
| X86_FEATURE_MATCH(X86_FEATURE_AES), |
| {} |
| }; |
| MODULE_DEVICE_TABLE(x86cpu, aesni_cpu_id); |
| |
| static int __init aesni_init(void) |
| { |
| int err; |
| |
| if (!x86_match_cpu(aesni_cpu_id)) |
| return -ENODEV; |
| #ifdef CONFIG_X86_64 |
| #ifdef CONFIG_AS_AVX2 |
| if (boot_cpu_has(X86_FEATURE_AVX2)) { |
| pr_info("AVX2 version of gcm_enc/dec engaged.\n"); |
| aesni_gcm_enc_tfm = aesni_gcm_enc_avx2; |
| aesni_gcm_dec_tfm = aesni_gcm_dec_avx2; |
| } else |
| #endif |
| #ifdef CONFIG_AS_AVX |
| if (boot_cpu_has(X86_FEATURE_AVX)) { |
| pr_info("AVX version of gcm_enc/dec engaged.\n"); |
| aesni_gcm_enc_tfm = aesni_gcm_enc_avx; |
| aesni_gcm_dec_tfm = aesni_gcm_dec_avx; |
| } else |
| #endif |
| { |
| pr_info("SSE version of gcm_enc/dec engaged.\n"); |
| aesni_gcm_enc_tfm = aesni_gcm_enc; |
| aesni_gcm_dec_tfm = aesni_gcm_dec; |
| } |
| #endif |
| |
| err = crypto_fpu_init(); |
| if (err) |
| return err; |
| |
| return crypto_register_algs(aesni_algs, ARRAY_SIZE(aesni_algs)); |
| } |
| |
| static void __exit aesni_exit(void) |
| { |
| crypto_unregister_algs(aesni_algs, ARRAY_SIZE(aesni_algs)); |
| |
| crypto_fpu_exit(); |
| } |
| |
| module_init(aesni_init); |
| module_exit(aesni_exit); |
| |
| MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, Intel AES-NI instructions optimized"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS("aes"); |
