src/parsec/disk-image/parsec/parsec-benchmark/pkgs/libs/ssl/src/fips/rsa/fips_rsa_sign.c - public/gem5-resources - Git at Google

 /* fips_rsa_sign.c */
 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  * project 2007.
  */
 /* ====================================================================
  * Copyright (c) 2007 The OpenSSL Project.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  *
  * 2. 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.
  *
  * 3. All advertising materials mentioning features or use of this
  *    software must display the following acknowledgment:
  *    "This product includes software developed by the OpenSSL Project
  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  *
  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  *    endorse or promote products derived from this software without
  *    prior written permission. For written permission, please contact
  *    licensing@OpenSSL.org.
  *
  * 5. Products derived from this software may not be called "OpenSSL"
  *    nor may "OpenSSL" appear in their names without prior written
  *    permission of the OpenSSL Project.
  *
  * 6. Redistributions of any form whatsoever must retain the following
  *    acknowledgment:
  *    "This product includes software developed by the OpenSSL Project
  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  *
  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  * ====================================================================
  *
  * This product includes cryptographic software written by Eric Young
  * (eay@cryptsoft.com).  This product includes software written by Tim
  * Hudson (tjh@cryptsoft.com).
  *
  */

 #include <string.h>
 #include <openssl/evp.h>
 #include <openssl/rsa.h>
 #include <openssl/err.h>
 #include <openssl/sha.h>

 #ifdef OPENSSL_FIPS

 /* FIPS versions of RSA_sign() and RSA_verify().
  * These will only have to deal with SHA* signatures and by including
  * pregenerated encodings all ASN1 dependencies can be avoided
  */

 /* Standard encodings including NULL parameter */

 static const unsigned char sha1_bin[] = {
   0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x0e, 0x03, 0x02, 0x1a, 0x05,
   0x00, 0x04, 0x14
 };

 static const unsigned char sha224_bin[] = {
   0x30, 0x2d, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
   0x04, 0x02, 0x04, 0x05, 0x00, 0x04, 0x1c
 };

 static const unsigned char sha256_bin[] = {
   0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
   0x04, 0x02, 0x01, 0x05, 0x00, 0x04, 0x20
 };

 static const unsigned char sha384_bin[] = {
   0x30, 0x41, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
   0x04, 0x02, 0x02, 0x05, 0x00, 0x04, 0x30
 };

 static const unsigned char sha512_bin[] = {
   0x30, 0x51, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
   0x04, 0x02, 0x03, 0x05, 0x00, 0x04, 0x40
 };

 /* Alternate encodings with absent parameters. We don't generate signature
  * using this format but do tolerate received signatures of this form.
  */

 static unsigned char sha1_nn_bin[] = {
   0x30, 0x1f, 0x30, 0x07, 0x06, 0x05, 0x2b, 0x0e, 0x03, 0x02, 0x1a, 0x04,
   0x14
 };

 static unsigned char sha224_nn_bin[] = {
   0x30, 0x2b, 0x30, 0x0b, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
   0x04, 0x02, 0x04, 0x04, 0x1c
 };

 static unsigned char sha256_nn_bin[] = {
   0x30, 0x2f, 0x30, 0x0b, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
   0x04, 0x02, 0x01, 0x04, 0x20
 };

 static unsigned char sha384_nn_bin[] = {
   0x30, 0x3f, 0x30, 0x0b, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
   0x04, 0x02, 0x02, 0x04, 0x30
 };

 static unsigned char sha512_nn_bin[] = {
   0x30, 0x4f, 0x30, 0x0b, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
   0x04, 0x02, 0x03, 0x04, 0x40
 };


 static const unsigned char *fips_digestinfo_encoding(int nid, unsigned int *len)
 	{
 	switch (nid)
 		{

 		case NID_sha1:
 		*len = sizeof(sha1_bin);
 		return sha1_bin;

 		case NID_sha224:
 		*len = sizeof(sha224_bin);
 		return sha224_bin;

 		case NID_sha256:
 		*len = sizeof(sha256_bin);
 		return sha256_bin;

 		case NID_sha384:
 		*len = sizeof(sha384_bin);
 		return sha384_bin;

 		case NID_sha512:
 		*len = sizeof(sha512_bin);
 		return sha512_bin;

 		default:
 		return NULL;

 		}
 	}

 static const unsigned char *fips_digestinfo_nn_encoding(int nid, unsigned int *len)
 	{
 	switch (nid)
 		{

 		case NID_sha1:
 		*len = sizeof(sha1_nn_bin);
 		return sha1_nn_bin;

 		case NID_sha224:
 		*len = sizeof(sha224_nn_bin);
 		return sha224_nn_bin;

 		case NID_sha256:
 		*len = sizeof(sha256_nn_bin);
 		return sha256_nn_bin;

 		case NID_sha384:
 		*len = sizeof(sha384_nn_bin);
 		return sha384_nn_bin;

 		case NID_sha512:
 		*len = sizeof(sha512_nn_bin);
 		return sha512_nn_bin;

 		default:
 		return NULL;

 		}
 	}

 static int fips_rsa_sign(int type, const unsigned char *x, unsigned int y,
 	     unsigned char *sigret, unsigned int *siglen, EVP_MD_SVCTX *sv)
 	{
 	int i=0,j,ret=0;
 	unsigned int dlen;
 	const unsigned char *der;
 	unsigned int m_len;
 	int pad_mode = sv->mctx->flags & EVP_MD_CTX_FLAG_PAD_MASK;
 	int rsa_pad_mode = 0;
 	RSA *rsa = sv->key;
 	/* Largest DigestInfo: 19 (max encoding) + max MD */
 	unsigned char tmpdinfo[19 + EVP_MAX_MD_SIZE];
 	unsigned char md[EVP_MAX_MD_SIZE + 1];

         EVP_DigestFinal_ex(sv->mctx, md, &m_len);

 	if((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_sign)
 		{
 		ret = rsa->meth->rsa_sign(type, md, m_len,
 			sigret, siglen, rsa);
 		goto done;
 		}

 	if (pad_mode == EVP_MD_CTX_FLAG_PAD_X931)
 		{
 		int hash_id;
 		memcpy(tmpdinfo, md, m_len);
 		hash_id = RSA_X931_hash_id(M_EVP_MD_CTX_type(sv->mctx));
 		if (hash_id == -1)
 			{
 			RSAerr(RSA_F_FIPS_RSA_SIGN,RSA_R_UNKNOWN_ALGORITHM_TYPE);
 			return 0;
 			}
 		tmpdinfo[m_len] = (unsigned char)hash_id;
 		i = m_len + 1;
 		rsa_pad_mode = RSA_X931_PADDING;
 		}
 	else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PKCS1)
 		{

 		der = fips_digestinfo_encoding(type, &dlen);

 		if (!der)
 			{
 			RSAerr(RSA_F_FIPS_RSA_SIGN,RSA_R_UNKNOWN_ALGORITHM_TYPE);
 			return 0;
 			}
 		memcpy(tmpdinfo, der, dlen);
 		memcpy(tmpdinfo + dlen, md, m_len);

 		i = dlen + m_len;
 		rsa_pad_mode = RSA_PKCS1_PADDING;

 		}
 	else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PSS)
 		{
 		unsigned char *sbuf;
 		int saltlen;
 		i = RSA_size(rsa);
 		sbuf = OPENSSL_malloc(RSA_size(rsa));
 		saltlen = M_EVP_MD_CTX_FLAG_PSS_SALT(sv->mctx);
 		if (saltlen == EVP_MD_CTX_FLAG_PSS_MDLEN)
 			saltlen = -1;
 		else if (saltlen == EVP_MD_CTX_FLAG_PSS_MREC)
 			saltlen = -2;
 		if (!sbuf)
 			{
 			RSAerr(RSA_F_FIPS_RSA_SIGN,ERR_R_MALLOC_FAILURE);
 			goto psserr;
 			}
 		if (!RSA_padding_add_PKCS1_PSS(rsa, sbuf, md,
 					M_EVP_MD_CTX_md(sv->mctx), saltlen))
 			goto psserr;
 		j=rsa->meth->rsa_priv_enc(i,sbuf,sigret,rsa,RSA_NO_PADDING);
 		if (j > 0)
 			{
 			ret=1;
 			*siglen=j;
 			}
 		psserr:
 		OPENSSL_cleanse(md,m_len);
 		OPENSSL_cleanse(sbuf, i);
 		OPENSSL_free(sbuf);
 		return ret;
 		}

 	j=RSA_size(rsa);
 	if (i > (j-RSA_PKCS1_PADDING_SIZE))
 		{
 		RSAerr(RSA_F_FIPS_RSA_SIGN,RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY);
 		goto done;
 		}
 	/* NB: call underlying method directly to avoid FIPS blocking */
 	j=rsa->meth->rsa_priv_enc(i,tmpdinfo,sigret,rsa,rsa_pad_mode);
 	if (j > 0)
 		{
 		ret=1;
 		*siglen=j;
 		}

 	done:
 	OPENSSL_cleanse(tmpdinfo,i);
 	OPENSSL_cleanse(md,m_len);
 	return ret;
 	}

 static int fips_rsa_verify(int dtype,
 		const unsigned char *x, unsigned int y,
 		unsigned char *sigbuf, unsigned int siglen, EVP_MD_SVCTX *sv)
 	{
 	int i,ret=0;
 	unsigned int dlen, diglen;
 	int pad_mode = sv->mctx->flags & EVP_MD_CTX_FLAG_PAD_MASK;
 	int rsa_pad_mode = 0;
 	unsigned char *s;
 	const unsigned char *der;
 	unsigned char dig[EVP_MAX_MD_SIZE];
 	RSA *rsa = sv->key;

 	if (siglen != (unsigned int)RSA_size(sv->key))
 		{
 		RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_WRONG_SIGNATURE_LENGTH);
 		return(0);
 		}

         EVP_DigestFinal_ex(sv->mctx, dig, &diglen);

 	if((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_verify)
 		{
 		return rsa->meth->rsa_verify(dtype, dig, diglen,
 			sigbuf, siglen, rsa);
 		}


 	s= OPENSSL_malloc((unsigned int)siglen);
 	if (s == NULL)
 		{
 		RSAerr(RSA_F_FIPS_RSA_VERIFY,ERR_R_MALLOC_FAILURE);
 		goto err;
 		}
 	if (pad_mode == EVP_MD_CTX_FLAG_PAD_X931)
 		rsa_pad_mode = RSA_X931_PADDING;
 	else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PKCS1)
 		rsa_pad_mode = RSA_PKCS1_PADDING;
 	else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PSS)
 		rsa_pad_mode = RSA_NO_PADDING;

 	/* NB: call underlying method directly to avoid FIPS blocking */
 	i=rsa->meth->rsa_pub_dec((int)siglen,sigbuf,s, rsa, rsa_pad_mode);

 	if (i <= 0) goto err;

 	if (pad_mode == EVP_MD_CTX_FLAG_PAD_X931)
 		{
 		int hash_id;
 		if (i != (int)(diglen + 1))
 			{
 			RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
 			goto err;
 			}
 		hash_id = RSA_X931_hash_id(M_EVP_MD_CTX_type(sv->mctx));
 		if (hash_id == -1)
 			{
 			RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_UNKNOWN_ALGORITHM_TYPE);
 			goto err;
 			}
 		if (s[diglen] != (unsigned char)hash_id)
 			{
 			RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
 			goto err;
 			}
 		if (memcmp(s, dig, diglen))
 			{
 			RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
 			goto err;
 			}
 		ret = 1;
 		}
 	else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PKCS1)
 		{

 		der = fips_digestinfo_encoding(dtype, &dlen);

 		if (!der)
 			{
 			RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_UNKNOWN_ALGORITHM_TYPE);
 			return(0);
 			}

 		/* Compare, DigestInfo length, DigestInfo header and finally
 		 * digest value itself
 		 */

 		/* If length mismatch try alternate encoding */
 		if (i != (int)(dlen + diglen))
 			der = fips_digestinfo_nn_encoding(dtype, &dlen);

 		if ((i != (int)(dlen + diglen)) || memcmp(der, s, dlen)
 			|| memcmp(s + dlen, dig, diglen))
 			{
 			RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
 			goto err;
 			}
 		ret = 1;

 		}
 	else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PSS)
 		{
 		int saltlen;
 		saltlen = M_EVP_MD_CTX_FLAG_PSS_SALT(sv->mctx);
 		if (saltlen == EVP_MD_CTX_FLAG_PSS_MDLEN)
 			saltlen = -1;
 		else if (saltlen == EVP_MD_CTX_FLAG_PSS_MREC)
 			saltlen = -2;
 		ret = RSA_verify_PKCS1_PSS(rsa, dig, M_EVP_MD_CTX_md(sv->mctx),
 						s, saltlen);
 		if (ret < 0)
 			ret = 0;
 		}
 err:
 	if (s != NULL)
 		{
 		OPENSSL_cleanse(s, siglen);
 		OPENSSL_free(s);
 		}
 	return(ret);
 	}

 #define EVP_PKEY_RSA_fips_method \
 				(evp_sign_method *)fips_rsa_sign, \
 				(evp_verify_method *)fips_rsa_verify, \
 				{EVP_PKEY_RSA,EVP_PKEY_RSA2,0,0}

 static int init(EVP_MD_CTX *ctx)
 	{ return SHA1_Init(ctx->md_data); }

 static int update(EVP_MD_CTX *ctx,const void *data,size_t count)
 	{ return SHA1_Update(ctx->md_data,data,count); }

 static int final(EVP_MD_CTX *ctx,unsigned char *md)
 	{ return SHA1_Final(md,ctx->md_data); }

 static const EVP_MD sha1_md=
 	{
 	NID_sha1,
 	NID_sha1WithRSAEncryption,
 	SHA_DIGEST_LENGTH,
 	EVP_MD_FLAG_FIPS|EVP_MD_FLAG_SVCTX,
 	init,
 	update,
 	final,
 	NULL,
 	NULL,
 	EVP_PKEY_RSA_fips_method,
 	SHA_CBLOCK,
 	sizeof(EVP_MD *)+sizeof(SHA_CTX),
 	};

 const EVP_MD *EVP_sha1(void)
 	{
 	return(&sha1_md);
 	}

 static int init224(EVP_MD_CTX *ctx)
 	{ return SHA224_Init(ctx->md_data); }
 static int init256(EVP_MD_CTX *ctx)
 	{ return SHA256_Init(ctx->md_data); }
 /*
  * Even though there're separate SHA224_[Update|Final], we call
  * SHA256 functions even in SHA224 context. This is what happens
  * there anyway, so we can spare few CPU cycles:-)
  */
 static int update256(EVP_MD_CTX *ctx,const void *data,size_t count)
 	{ return SHA256_Update(ctx->md_data,data,count); }
 static int final256(EVP_MD_CTX *ctx,unsigned char *md)
 	{ return SHA256_Final(md,ctx->md_data); }

 static const EVP_MD sha224_md=
 	{
 	NID_sha224,
 	NID_sha224WithRSAEncryption,
 	SHA224_DIGEST_LENGTH,
 	EVP_MD_FLAG_FIPS|EVP_MD_FLAG_SVCTX,
 	init224,
 	update256,
 	final256,
 	NULL,
 	NULL,
 	EVP_PKEY_RSA_fips_method,
 	SHA256_CBLOCK,
 	sizeof(EVP_MD *)+sizeof(SHA256_CTX),
 	};

 const EVP_MD *EVP_sha224(void)
 	{ return(&sha224_md); }

 static const EVP_MD sha256_md=
 	{
 	NID_sha256,
 	NID_sha256WithRSAEncryption,
 	SHA256_DIGEST_LENGTH,
 	EVP_MD_FLAG_FIPS|EVP_MD_FLAG_SVCTX,
 	init256,
 	update256,
 	final256,
 	NULL,
 	NULL,
 	EVP_PKEY_RSA_fips_method,
 	SHA256_CBLOCK,
 	sizeof(EVP_MD *)+sizeof(SHA256_CTX),
 	};

 const EVP_MD *EVP_sha256(void)
 	{ return(&sha256_md); }

 static int init384(EVP_MD_CTX *ctx)
 	{ return SHA384_Init(ctx->md_data); }
 static int init512(EVP_MD_CTX *ctx)
 	{ return SHA512_Init(ctx->md_data); }
 /* See comment in SHA224/256 section */
 static int update512(EVP_MD_CTX *ctx,const void *data,size_t count)
 	{ return SHA512_Update(ctx->md_data,data,count); }
 static int final512(EVP_MD_CTX *ctx,unsigned char *md)
 	{ return SHA512_Final(md,ctx->md_data); }

 static const EVP_MD sha384_md=
 	{
 	NID_sha384,
 	NID_sha384WithRSAEncryption,
 	SHA384_DIGEST_LENGTH,
 	EVP_MD_FLAG_FIPS|EVP_MD_FLAG_SVCTX,
 	init384,
 	update512,
 	final512,
 	NULL,
 	NULL,
 	EVP_PKEY_RSA_fips_method,
 	SHA512_CBLOCK,
 	sizeof(EVP_MD *)+sizeof(SHA512_CTX),
 	};

 const EVP_MD *EVP_sha384(void)
 	{ return(&sha384_md); }

 static const EVP_MD sha512_md=
 	{
 	NID_sha512,
 	NID_sha512WithRSAEncryption,
 	SHA512_DIGEST_LENGTH,
 	EVP_MD_FLAG_FIPS|EVP_MD_FLAG_SVCTX,
 	init512,
 	update512,
 	final512,
 	NULL,
 	NULL,
 	EVP_PKEY_RSA_fips_method,
 	SHA512_CBLOCK,
 	sizeof(EVP_MD *)+sizeof(SHA512_CTX),
 	};

 const EVP_MD *EVP_sha512(void)
 	{ return(&sha512_md); }

 #endif
	/* fips_rsa_sign.c */
	/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
	* project 2007.
	*/
	/* ====================================================================
	* Copyright (c) 2007 The OpenSSL Project. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	*
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	*
	* 2. 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.
	*
	* 3. All advertising materials mentioning features or use of this
	* software must display the following acknowledgment:
	* "This product includes software developed by the OpenSSL Project
	* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
	*
	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	* endorse or promote products derived from this software without
	* prior written permission. For written permission, please contact
	* licensing@OpenSSL.org.
	*
	* 5. Products derived from this software may not be called "OpenSSL"
	* nor may "OpenSSL" appear in their names without prior written
	* permission of the OpenSSL Project.
	*
	* 6. Redistributions of any form whatsoever must retain the following
	* acknowledgment:
	* "This product includes software developed by the OpenSSL Project
	* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
	*
	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	* OF THE POSSIBILITY OF SUCH DAMAGE.
	* ====================================================================
	*
	* This product includes cryptographic software written by Eric Young
	* (eay@cryptsoft.com). This product includes software written by Tim
	* Hudson (tjh@cryptsoft.com).
	*
	*/

	#include <string.h>
	#include <openssl/evp.h>
	#include <openssl/rsa.h>
	#include <openssl/err.h>
	#include <openssl/sha.h>

	#ifdef OPENSSL_FIPS

	/* FIPS versions of RSA_sign() and RSA_verify().
	* These will only have to deal with SHA* signatures and by including
	* pregenerated encodings all ASN1 dependencies can be avoided
	*/

	/* Standard encodings including NULL parameter */

	static const unsigned char sha1_bin[] = {
	0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x0e, 0x03, 0x02, 0x1a, 0x05,
	0x00, 0x04, 0x14
	};

	static const unsigned char sha224_bin[] = {
	0x30, 0x2d, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
	0x04, 0x02, 0x04, 0x05, 0x00, 0x04, 0x1c
	};

	static const unsigned char sha256_bin[] = {
	0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
	0x04, 0x02, 0x01, 0x05, 0x00, 0x04, 0x20
	};

	static const unsigned char sha384_bin[] = {
	0x30, 0x41, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
	0x04, 0x02, 0x02, 0x05, 0x00, 0x04, 0x30
	};

	static const unsigned char sha512_bin[] = {
	0x30, 0x51, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
	0x04, 0x02, 0x03, 0x05, 0x00, 0x04, 0x40
	};

	/* Alternate encodings with absent parameters. We don't generate signature
	* using this format but do tolerate received signatures of this form.
	*/

	static unsigned char sha1_nn_bin[] = {
	0x30, 0x1f, 0x30, 0x07, 0x06, 0x05, 0x2b, 0x0e, 0x03, 0x02, 0x1a, 0x04,
	0x14
	};

	static unsigned char sha224_nn_bin[] = {
	0x30, 0x2b, 0x30, 0x0b, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
	0x04, 0x02, 0x04, 0x04, 0x1c
	};

	static unsigned char sha256_nn_bin[] = {
	0x30, 0x2f, 0x30, 0x0b, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
	0x04, 0x02, 0x01, 0x04, 0x20
	};

	static unsigned char sha384_nn_bin[] = {
	0x30, 0x3f, 0x30, 0x0b, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
	0x04, 0x02, 0x02, 0x04, 0x30
	};

	static unsigned char sha512_nn_bin[] = {
	0x30, 0x4f, 0x30, 0x0b, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
	0x04, 0x02, 0x03, 0x04, 0x40
	};


	static const unsigned char fips_digestinfo_encoding(int nid, unsigned int len)
	{
	switch (nid)
	{

	case NID_sha1:
	*len = sizeof(sha1_bin);
	return sha1_bin;

	case NID_sha224:
	*len = sizeof(sha224_bin);
	return sha224_bin;

	case NID_sha256:
	*len = sizeof(sha256_bin);
	return sha256_bin;

	case NID_sha384:
	*len = sizeof(sha384_bin);
	return sha384_bin;

	case NID_sha512:
	*len = sizeof(sha512_bin);
	return sha512_bin;

	default:
	return NULL;

	}
	}

	static const unsigned char fips_digestinfo_nn_encoding(int nid, unsigned int len)
	{
	switch (nid)
	{

	case NID_sha1:
	*len = sizeof(sha1_nn_bin);
	return sha1_nn_bin;

	case NID_sha224:
	*len = sizeof(sha224_nn_bin);
	return sha224_nn_bin;

	case NID_sha256:
	*len = sizeof(sha256_nn_bin);
	return sha256_nn_bin;

	case NID_sha384:
	*len = sizeof(sha384_nn_bin);
	return sha384_nn_bin;

	case NID_sha512:
	*len = sizeof(sha512_nn_bin);
	return sha512_nn_bin;

	default:
	return NULL;

	}
	}

	static int fips_rsa_sign(int type, const unsigned char *x, unsigned int y,
	unsigned char sigret, unsigned int siglen, EVP_MD_SVCTX *sv)
	{
	int i=0,j,ret=0;
	unsigned int dlen;
	const unsigned char *der;
	unsigned int m_len;
	int pad_mode = sv->mctx->flags & EVP_MD_CTX_FLAG_PAD_MASK;
	int rsa_pad_mode = 0;
	RSA *rsa = sv->key;
	/* Largest DigestInfo: 19 (max encoding) + max MD */
	unsigned char tmpdinfo[19 + EVP_MAX_MD_SIZE];
	unsigned char md[EVP_MAX_MD_SIZE + 1];

	EVP_DigestFinal_ex(sv->mctx, md, &m_len);

	if((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_sign)
	{
	ret = rsa->meth->rsa_sign(type, md, m_len,
	sigret, siglen, rsa);
	goto done;
	}

	if (pad_mode == EVP_MD_CTX_FLAG_PAD_X931)
	{
	int hash_id;
	memcpy(tmpdinfo, md, m_len);
	hash_id = RSA_X931_hash_id(M_EVP_MD_CTX_type(sv->mctx));
	if (hash_id == -1)
	{
	RSAerr(RSA_F_FIPS_RSA_SIGN,RSA_R_UNKNOWN_ALGORITHM_TYPE);
	return 0;
	}
	tmpdinfo[m_len] = (unsigned char)hash_id;
	i = m_len + 1;
	rsa_pad_mode = RSA_X931_PADDING;
	}
	else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PKCS1)
	{

	der = fips_digestinfo_encoding(type, &dlen);

	if (!der)
	{
	RSAerr(RSA_F_FIPS_RSA_SIGN,RSA_R_UNKNOWN_ALGORITHM_TYPE);
	return 0;
	}
	memcpy(tmpdinfo, der, dlen);
	memcpy(tmpdinfo + dlen, md, m_len);

	i = dlen + m_len;
	rsa_pad_mode = RSA_PKCS1_PADDING;

	}
	else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PSS)
	{
	unsigned char *sbuf;
	int saltlen;
	i = RSA_size(rsa);
	sbuf = OPENSSL_malloc(RSA_size(rsa));
	saltlen = M_EVP_MD_CTX_FLAG_PSS_SALT(sv->mctx);
	if (saltlen == EVP_MD_CTX_FLAG_PSS_MDLEN)
	saltlen = -1;
	else if (saltlen == EVP_MD_CTX_FLAG_PSS_MREC)
	saltlen = -2;
	if (!sbuf)
	{
	RSAerr(RSA_F_FIPS_RSA_SIGN,ERR_R_MALLOC_FAILURE);
	goto psserr;
	}
	if (!RSA_padding_add_PKCS1_PSS(rsa, sbuf, md,
	M_EVP_MD_CTX_md(sv->mctx), saltlen))
	goto psserr;
	j=rsa->meth->rsa_priv_enc(i,sbuf,sigret,rsa,RSA_NO_PADDING);
	if (j > 0)
	{
	ret=1;
	*siglen=j;
	}
	psserr:
	OPENSSL_cleanse(md,m_len);
	OPENSSL_cleanse(sbuf, i);
	OPENSSL_free(sbuf);
	return ret;
	}

	j=RSA_size(rsa);
	if (i > (j-RSA_PKCS1_PADDING_SIZE))
	{
	RSAerr(RSA_F_FIPS_RSA_SIGN,RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY);
	goto done;
	}
	/* NB: call underlying method directly to avoid FIPS blocking */
	j=rsa->meth->rsa_priv_enc(i,tmpdinfo,sigret,rsa,rsa_pad_mode);
	if (j > 0)
	{
	ret=1;
	*siglen=j;
	}

	done:
	OPENSSL_cleanse(tmpdinfo,i);
	OPENSSL_cleanse(md,m_len);
	return ret;
	}

	static int fips_rsa_verify(int dtype,
	const unsigned char *x, unsigned int y,
	unsigned char sigbuf, unsigned int siglen, EVP_MD_SVCTX sv)
	{
	int i,ret=0;
	unsigned int dlen, diglen;
	int pad_mode = sv->mctx->flags & EVP_MD_CTX_FLAG_PAD_MASK;
	int rsa_pad_mode = 0;
	unsigned char *s;
	const unsigned char *der;
	unsigned char dig[EVP_MAX_MD_SIZE];
	RSA *rsa = sv->key;

	if (siglen != (unsigned int)RSA_size(sv->key))
	{
	RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_WRONG_SIGNATURE_LENGTH);
	return(0);
	}

	EVP_DigestFinal_ex(sv->mctx, dig, &diglen);

	if((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_verify)
	{
	return rsa->meth->rsa_verify(dtype, dig, diglen,
	sigbuf, siglen, rsa);
	}


	s= OPENSSL_malloc((unsigned int)siglen);
	if (s == NULL)
	{
	RSAerr(RSA_F_FIPS_RSA_VERIFY,ERR_R_MALLOC_FAILURE);
	goto err;
	}
	if (pad_mode == EVP_MD_CTX_FLAG_PAD_X931)
	rsa_pad_mode = RSA_X931_PADDING;
	else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PKCS1)
	rsa_pad_mode = RSA_PKCS1_PADDING;
	else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PSS)
	rsa_pad_mode = RSA_NO_PADDING;

	/* NB: call underlying method directly to avoid FIPS blocking */
	i=rsa->meth->rsa_pub_dec((int)siglen,sigbuf,s, rsa, rsa_pad_mode);

	if (i <= 0) goto err;

	if (pad_mode == EVP_MD_CTX_FLAG_PAD_X931)
	{
	int hash_id;
	if (i != (int)(diglen + 1))
	{
	RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
	goto err;
	}
	hash_id = RSA_X931_hash_id(M_EVP_MD_CTX_type(sv->mctx));
	if (hash_id == -1)
	{
	RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_UNKNOWN_ALGORITHM_TYPE);
	goto err;
	}
	if (s[diglen] != (unsigned char)hash_id)
	{
	RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
	goto err;
	}
	if (memcmp(s, dig, diglen))
	{
	RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
	goto err;
	}
	ret = 1;
	}
	else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PKCS1)
	{

	der = fips_digestinfo_encoding(dtype, &dlen);

	if (!der)
	{
	RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_UNKNOWN_ALGORITHM_TYPE);
	return(0);
	}

	/* Compare, DigestInfo length, DigestInfo header and finally
	* digest value itself
	*/

	/* If length mismatch try alternate encoding */
	if (i != (int)(dlen + diglen))
	der = fips_digestinfo_nn_encoding(dtype, &dlen);

	if ((i != (int)(dlen + diglen)) \|\| memcmp(der, s, dlen)
	\|\| memcmp(s + dlen, dig, diglen))
	{
	RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
	goto err;
	}
	ret = 1;

	}
	else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PSS)
	{
	int saltlen;
	saltlen = M_EVP_MD_CTX_FLAG_PSS_SALT(sv->mctx);
	if (saltlen == EVP_MD_CTX_FLAG_PSS_MDLEN)
	saltlen = -1;
	else if (saltlen == EVP_MD_CTX_FLAG_PSS_MREC)
	saltlen = -2;
	ret = RSA_verify_PKCS1_PSS(rsa, dig, M_EVP_MD_CTX_md(sv->mctx),
	s, saltlen);
	if (ret < 0)
	ret = 0;
	}
	err:
	if (s != NULL)
	{
	OPENSSL_cleanse(s, siglen);
	OPENSSL_free(s);
	}
	return(ret);
	}

	#define EVP_PKEY_RSA_fips_method \
	(evp_sign_method *)fips_rsa_sign, \
	(evp_verify_method *)fips_rsa_verify, \
	{EVP_PKEY_RSA,EVP_PKEY_RSA2,0,0}

	static int init(EVP_MD_CTX *ctx)
	{ return SHA1_Init(ctx->md_data); }

	static int update(EVP_MD_CTX ctx,const void data,size_t count)
	{ return SHA1_Update(ctx->md_data,data,count); }

	static int final(EVP_MD_CTX ctx,unsigned char md)
	{ return SHA1_Final(md,ctx->md_data); }

	static const EVP_MD sha1_md=
	{
	NID_sha1,
	NID_sha1WithRSAEncryption,
	SHA_DIGEST_LENGTH,
	EVP_MD_FLAG_FIPS\|EVP_MD_FLAG_SVCTX,
	init,
	update,
	final,
	NULL,
	NULL,
	EVP_PKEY_RSA_fips_method,
	SHA_CBLOCK,
	sizeof(EVP_MD *)+sizeof(SHA_CTX),
	};

	const EVP_MD *EVP_sha1(void)
	{
	return(&sha1_md);
	}

	static int init224(EVP_MD_CTX *ctx)
	{ return SHA224_Init(ctx->md_data); }
	static int init256(EVP_MD_CTX *ctx)
	{ return SHA256_Init(ctx->md_data); }
	/*
	* Even though there're separate SHA224_[Update\|Final], we call
	* SHA256 functions even in SHA224 context. This is what happens
	* there anyway, so we can spare few CPU cycles:-)
	*/
	static int update256(EVP_MD_CTX ctx,const void data,size_t count)
	{ return SHA256_Update(ctx->md_data,data,count); }
	static int final256(EVP_MD_CTX ctx,unsigned char md)
	{ return SHA256_Final(md,ctx->md_data); }

	static const EVP_MD sha224_md=
	{
	NID_sha224,
	NID_sha224WithRSAEncryption,
	SHA224_DIGEST_LENGTH,
	EVP_MD_FLAG_FIPS\|EVP_MD_FLAG_SVCTX,
	init224,
	update256,
	final256,
	NULL,
	NULL,
	EVP_PKEY_RSA_fips_method,
	SHA256_CBLOCK,
	sizeof(EVP_MD *)+sizeof(SHA256_CTX),
	};

	const EVP_MD *EVP_sha224(void)
	{ return(&sha224_md); }

	static const EVP_MD sha256_md=
	{
	NID_sha256,
	NID_sha256WithRSAEncryption,
	SHA256_DIGEST_LENGTH,
	EVP_MD_FLAG_FIPS\|EVP_MD_FLAG_SVCTX,
	init256,
	update256,
	final256,
	NULL,
	NULL,
	EVP_PKEY_RSA_fips_method,
	SHA256_CBLOCK,
	sizeof(EVP_MD *)+sizeof(SHA256_CTX),
	};

	const EVP_MD *EVP_sha256(void)
	{ return(&sha256_md); }

	static int init384(EVP_MD_CTX *ctx)
	{ return SHA384_Init(ctx->md_data); }
	static int init512(EVP_MD_CTX *ctx)
	{ return SHA512_Init(ctx->md_data); }
	/* See comment in SHA224/256 section */
	static int update512(EVP_MD_CTX ctx,const void data,size_t count)
	{ return SHA512_Update(ctx->md_data,data,count); }
	static int final512(EVP_MD_CTX ctx,unsigned char md)
	{ return SHA512_Final(md,ctx->md_data); }

	static const EVP_MD sha384_md=
	{
	NID_sha384,
	NID_sha384WithRSAEncryption,
	SHA384_DIGEST_LENGTH,
	EVP_MD_FLAG_FIPS\|EVP_MD_FLAG_SVCTX,
	init384,
	update512,
	final512,
	NULL,
	NULL,
	EVP_PKEY_RSA_fips_method,
	SHA512_CBLOCK,
	sizeof(EVP_MD *)+sizeof(SHA512_CTX),
	};

	const EVP_MD *EVP_sha384(void)
	{ return(&sha384_md); }

	static const EVP_MD sha512_md=
	{
	NID_sha512,
	NID_sha512WithRSAEncryption,
	SHA512_DIGEST_LENGTH,
	EVP_MD_FLAG_FIPS\|EVP_MD_FLAG_SVCTX,
	init512,
	update512,
	final512,
	NULL,
	NULL,
	EVP_PKEY_RSA_fips_method,
	SHA512_CBLOCK,
	sizeof(EVP_MD *)+sizeof(SHA512_CTX),
	};

	const EVP_MD *EVP_sha512(void)
	{ return(&sha512_md); }

	#endif