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openssl/fips/dsa/fips_dsa_sign.c

Index: openssl/fips/dsa/fips_dsa_sign.c
===================================================================
--- openssl/fips/dsa/fips_dsa_sign.c	(revision 105093)
+++ openssl/fips/dsa/fips_dsa_sign.c	(working copy)
@@ -1,258 +0,0 @@
-/* fips_dsa_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/dsa.h>
-#include <openssl/err.h>
-#include <openssl/sha.h>
-#include <openssl/bn.h>
-
-#ifdef OPENSSL_FIPS
-
-/* FIPS versions of DSA_sign() and DSA_verify().
- * These include a tiny ASN1 encoder/decoder to handle the specific
- * case of a DSA signature.
- */
-
-#if 0
-int FIPS_dsa_size(DSA *r)
-	{
-	int ilen;
-	ilen = BN_num_bytes(r->q);
-	if (ilen > 20)
-		return -1;
-	/* If MSB set need padding byte */
-	ilen ++;
-	/* Also need 2 bytes INTEGER header for r and s plus
-	 * 2 bytes SEQUENCE header making 6 in total.
-	 */
-	return ilen * 2 + 6;
-	}
-#endif
-
-/* Tiny ASN1 encoder for DSA_SIG structure. We can assume r, s smaller than
- * 0x80 octets as by the DSA standards they will be less than 2^160
- */
-
-int FIPS_dsa_sig_encode(unsigned char *out, DSA_SIG *sig)
-	{
-	int rlen, slen, rpad, spad, seqlen;
-	rlen = BN_num_bytes(sig->r);
-	if (rlen > 20)
-		return -1;
-	if (BN_num_bits(sig->r) & 0x7)
-		rpad = 0;
-	else
-		rpad = 1;
-	slen = BN_num_bytes(sig->s);
-	if (slen > 20)
-		return -1;
-	if (BN_num_bits(sig->s) & 0x7)
-		spad = 0;
-	else
-		spad = 1;
-	/* Length of SEQUENCE, (1 tag + 1 len octet) * 2 + content octets */
-	seqlen = rlen + rpad + slen + spad + 4;
-	/* Actual encoded length: include SEQUENCE header */
-	if (!out)
-		return seqlen + 2;
-
-	/* Output SEQUENCE header */
-	*out++ = V_ASN1_SEQUENCE|V_ASN1_CONSTRUCTED;
-	*out++ = (unsigned char)seqlen;
-
-	/* Output r */
-	*out++ = V_ASN1_INTEGER;
-	*out++ = (unsigned char)(rlen + rpad);
-	if (rpad)
-		*out++ = 0;
-	BN_bn2bin(sig->r, out);
-	out += rlen;
-
-	/* Output s */
-	*out++ = V_ASN1_INTEGER;
-	*out++ = (unsigned char)(slen + spad);
-	if (spad)
-		*out++ = 0;
-	BN_bn2bin(sig->s, out);
-	return seqlen + 2;
-	}
-
-/* Companion DSA_SIG decoder */
-
-int FIPS_dsa_sig_decode(DSA_SIG *sig, const unsigned char *in, int inlen)
-	{
-	int seqlen, rlen, slen;
-	const unsigned char *rbin;
-	/* Sanity check */
-
-	/* Need SEQUENCE tag */
-	if (*in++ != (V_ASN1_SEQUENCE|V_ASN1_CONSTRUCTED))
-		return 0;
-	/* Get length octet */
-	seqlen = *in++;
-	/* Check sensible length value */
-	if (seqlen < 4 || seqlen > 0x7F)
-		return 0;
-	/* Check INTEGER tag */
-	if (*in++ != V_ASN1_INTEGER)
-		return 0;
-	rlen = *in++;
-	seqlen -= 2 + rlen;
-	/* Check sensible seqlen value */
-	if (seqlen < 2)
-		return 0;
-	rbin = in;
-	in += rlen;
-	/* Check INTEGER tag */
-	if (*in++ != V_ASN1_INTEGER)
-		return 0;
-	slen = *in++;
-	/* Remaining bytes of SEQUENCE should exactly match
-	 * encoding of s
-	 */
-	if (seqlen != (slen + 2))
-		return 0;
-	if (!sig->r && !(sig->r = BN_new()))
-		return 0;
-	if (!sig->s && !(sig->s = BN_new()))
-		return 0;
-	if (!BN_bin2bn(rbin, rlen, sig->r))
-		return 0;
-	if (!BN_bin2bn(in, slen, sig->s))
-		return 0;
-	return 1;
-	}
-
-static int fips_dsa_sign(int type, const unsigned char *x, int y,
-	     unsigned char *sig, unsigned int *siglen, EVP_MD_SVCTX *sv)
-	{
-	DSA *dsa = sv->key;
-	unsigned char dig[EVP_MAX_MD_SIZE];
-	unsigned int dlen;
-	DSA_SIG *s;
-        EVP_DigestFinal_ex(sv->mctx, dig, &dlen);
-	s=dsa->meth->dsa_do_sign(dig,dlen,dsa);
-	OPENSSL_cleanse(dig, dlen);
-	if (s == NULL)
-		{
-		*siglen=0;
-		return 0;
-		}
-	*siglen= FIPS_dsa_sig_encode(sig, s);
-	DSA_SIG_free(s);
-	if (*siglen < 0)
-		return 0;
-	return 1;
-	}
-
-static int fips_dsa_verify(int type, const unsigned char *x, int y,
-	     const unsigned char *sigbuf, unsigned int siglen, EVP_MD_SVCTX *sv)
-	{
-	DSA *dsa = sv->key;
-	DSA_SIG *s;
-	int ret=-1;
-	unsigned char dig[EVP_MAX_MD_SIZE];
-	unsigned int dlen;
-
-	s = DSA_SIG_new();
-	if (s == NULL)
-		return ret;
-	if (!FIPS_dsa_sig_decode(s,sigbuf,siglen))
-		goto err;
-        EVP_DigestFinal_ex(sv->mctx, dig, &dlen);
-	ret=dsa->meth->dsa_do_verify(dig,dlen,s,dsa);
-	OPENSSL_cleanse(dig, dlen);
-err:
-	DSA_SIG_free(s);
-	return ret;
-	}
-
-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 dss1_md=
-	{
-	NID_dsa,
-	NID_dsaWithSHA1,
-	SHA_DIGEST_LENGTH,
-	EVP_MD_FLAG_FIPS|EVP_MD_FLAG_SVCTX,
-	init,
-	update,
-	final,
-	NULL,
-	NULL,
-	(evp_sign_method *)fips_dsa_sign,
-	(evp_verify_method *)fips_dsa_verify,
-	{EVP_PKEY_DSA,EVP_PKEY_DSA2,EVP_PKEY_DSA3, EVP_PKEY_DSA4,0},
-	SHA_CBLOCK,
-	sizeof(EVP_MD *)+sizeof(SHA_CTX),
-	};
-
-const EVP_MD *EVP_dss1(void)
-	{
-	return(&dss1_md);
-	}
-#endif