Initial import of OpenSSL 0.9.4, sans IDEA and RSA code for patent

infringement reasons.

1 files changed, 160 insertions, 0 deletions

diff --git a/crypto/openssl/crypto/dsa/dsa_vrf.c b/crypto/openssl/crypto/dsa/dsa_vrf.c
new file mode 100644
index 0000000..ff55220
--- /dev/null
+++ b/crypto/openssl/crypto/dsa/dsa_vrf.c
@@ -0,0 +1,160 @@
+/* crypto/dsa/dsa_vrf.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ * 
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to.  The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ * 
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ * 
+ * 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 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 acknowledgement:
+ *    "This product includes cryptographic software written by
+ *     Eric Young (eay@cryptsoft.com)"
+ *    The word 'cryptographic' can be left out if the rouines from the library
+ *    being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from 
+ *    the apps directory (application code) you must include an acknowledgement:
+ *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ * 
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS 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 AUTHOR OR 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.
+ * 
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed.  i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+/* Original version from Steven Schoch <schoch@sheba.arc.nasa.gov> */
+
+#include <stdio.h>
+#include "cryptlib.h"
+#include <openssl/bn.h>
+#include <openssl/dsa.h>
+#include <openssl/rand.h>
+#include <openssl/asn1.h>
+#include <openssl/asn1_mac.h>
+
+int DSA_do_verify(const unsigned char *dgst, int dgst_len, DSA_SIG *sig,
+		  DSA *dsa)
+	{
+	BN_CTX *ctx;
+	BIGNUM u1,u2,t1;
+	BN_MONT_CTX *mont=NULL;
+	int ret = -1;
+
+	if ((ctx=BN_CTX_new()) == NULL) goto err;
+	BN_init(&u1);
+	BN_init(&u2);
+	BN_init(&t1);
+
+	/* Calculate W = inv(S) mod Q
+	 * save W in u2 */
+	if ((BN_mod_inverse(&u2,sig->s,dsa->q,ctx)) == NULL) goto err;
+
+	/* save M in u1 */
+	if (BN_bin2bn(dgst,dgst_len,&u1) == NULL) goto err;
+
+	/* u1 = M * w mod q */
+	if (!BN_mod_mul(&u1,&u1,&u2,dsa->q,ctx)) goto err;
+
+	/* u2 = r * w mod q */
+	if (!BN_mod_mul(&u2,sig->r,&u2,dsa->q,ctx)) goto err;
+
+	if ((dsa->method_mont_p == NULL) && (dsa->flags & DSA_FLAG_CACHE_MONT_P))
+		{
+		if ((dsa->method_mont_p=(char *)BN_MONT_CTX_new()) != NULL)
+			if (!BN_MONT_CTX_set((BN_MONT_CTX *)dsa->method_mont_p,
+				dsa->p,ctx)) goto err;
+		}
+	mont=(BN_MONT_CTX *)dsa->method_mont_p;
+
+#if 0
+	{
+	BIGNUM t2;
+
+	BN_init(&t2);
+	/* v = ( g^u1 * y^u2 mod p ) mod q */
+	/* let t1 = g ^ u1 mod p */
+	if (!BN_mod_exp_mont(&t1,dsa->g,&u1,dsa->p,ctx,mont)) goto err;
+	/* let t2 = y ^ u2 mod p */
+	if (!BN_mod_exp_mont(&t2,dsa->pub_key,&u2,dsa->p,ctx,mont)) goto err;
+	/* let u1 = t1 * t2 mod p */
+	if (!BN_mod_mul(&u1,&t1,&t2,dsa->p,ctx)) goto err_bn;
+	BN_free(&t2);
+	}
+	/* let u1 = u1 mod q */
+	if (!BN_mod(&u1,&u1,dsa->q,ctx)) goto err;
+#else
+	{
+	if (!BN_mod_exp2_mont(&t1,dsa->g,&u1,dsa->pub_key,&u2,dsa->p,ctx,mont))
+		goto err;
+	/* BN_copy(&u1,&t1); */
+	/* let u1 = u1 mod q */
+	if (!BN_mod(&u1,&t1,dsa->q,ctx)) goto err;
+	}
+#endif
+	/* V is now in u1.  If the signature is correct, it will be
+	 * equal to R. */
+	ret=(BN_ucmp(&u1, sig->r) == 0);
+
+	err:
+	if (ret != 1) DSAerr(DSA_F_DSA_DO_VERIFY,ERR_R_BN_LIB);
+	if (ctx != NULL) BN_CTX_free(ctx);
+	BN_free(&u1);
+	BN_free(&u2);
+	BN_free(&t1);
+	return(ret);
+	}
+
+/* data has already been hashed (probably with SHA or SHA-1). */
+/* returns
+ *      1: correct signature
+ *      0: incorrect signature
+ *     -1: error
+ */
+int DSA_verify(int type, const unsigned char *dgst, int dgst_len,
+	     unsigned char *sigbuf, int siglen, DSA *dsa)
+	{
+	DSA_SIG *s;
+	int ret=-1;
+
+	s = DSA_SIG_new();
+	if (s == NULL) return(ret);
+	if (d2i_DSA_SIG(&s,&sigbuf,siglen) == NULL) goto err;
+	ret=DSA_do_verify(dgst,dgst_len,s,dsa);
+err:
+	DSA_SIG_free(s);
+	return(ret);
+	}