xref: /onnv-gate/usr/src/common/openssl/crypto/dsa/dsa_vrf.c (revision 0:68f95e015346)
1*0Sstevel@tonic-gate /* crypto/dsa/dsa_vrf.c */
2*0Sstevel@tonic-gate /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3*0Sstevel@tonic-gate  * All rights reserved.
4*0Sstevel@tonic-gate  *
5*0Sstevel@tonic-gate  * This package is an SSL implementation written
6*0Sstevel@tonic-gate  * by Eric Young (eay@cryptsoft.com).
7*0Sstevel@tonic-gate  * The implementation was written so as to conform with Netscapes SSL.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * This library is free for commercial and non-commercial use as long as
10*0Sstevel@tonic-gate  * the following conditions are aheared to.  The following conditions
11*0Sstevel@tonic-gate  * apply to all code found in this distribution, be it the RC4, RSA,
12*0Sstevel@tonic-gate  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13*0Sstevel@tonic-gate  * included with this distribution is covered by the same copyright terms
14*0Sstevel@tonic-gate  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15*0Sstevel@tonic-gate  *
16*0Sstevel@tonic-gate  * Copyright remains Eric Young's, and as such any Copyright notices in
17*0Sstevel@tonic-gate  * the code are not to be removed.
18*0Sstevel@tonic-gate  * If this package is used in a product, Eric Young should be given attribution
19*0Sstevel@tonic-gate  * as the author of the parts of the library used.
20*0Sstevel@tonic-gate  * This can be in the form of a textual message at program startup or
21*0Sstevel@tonic-gate  * in documentation (online or textual) provided with the package.
22*0Sstevel@tonic-gate  *
23*0Sstevel@tonic-gate  * Redistribution and use in source and binary forms, with or without
24*0Sstevel@tonic-gate  * modification, are permitted provided that the following conditions
25*0Sstevel@tonic-gate  * are met:
26*0Sstevel@tonic-gate  * 1. Redistributions of source code must retain the copyright
27*0Sstevel@tonic-gate  *    notice, this list of conditions and the following disclaimer.
28*0Sstevel@tonic-gate  * 2. Redistributions in binary form must reproduce the above copyright
29*0Sstevel@tonic-gate  *    notice, this list of conditions and the following disclaimer in the
30*0Sstevel@tonic-gate  *    documentation and/or other materials provided with the distribution.
31*0Sstevel@tonic-gate  * 3. All advertising materials mentioning features or use of this software
32*0Sstevel@tonic-gate  *    must display the following acknowledgement:
33*0Sstevel@tonic-gate  *    "This product includes cryptographic software written by
34*0Sstevel@tonic-gate  *     Eric Young (eay@cryptsoft.com)"
35*0Sstevel@tonic-gate  *    The word 'cryptographic' can be left out if the rouines from the library
36*0Sstevel@tonic-gate  *    being used are not cryptographic related :-).
37*0Sstevel@tonic-gate  * 4. If you include any Windows specific code (or a derivative thereof) from
38*0Sstevel@tonic-gate  *    the apps directory (application code) you must include an acknowledgement:
39*0Sstevel@tonic-gate  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40*0Sstevel@tonic-gate  *
41*0Sstevel@tonic-gate  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42*0Sstevel@tonic-gate  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43*0Sstevel@tonic-gate  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44*0Sstevel@tonic-gate  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45*0Sstevel@tonic-gate  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46*0Sstevel@tonic-gate  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47*0Sstevel@tonic-gate  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48*0Sstevel@tonic-gate  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49*0Sstevel@tonic-gate  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50*0Sstevel@tonic-gate  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51*0Sstevel@tonic-gate  * SUCH DAMAGE.
52*0Sstevel@tonic-gate  *
53*0Sstevel@tonic-gate  * The licence and distribution terms for any publically available version or
54*0Sstevel@tonic-gate  * derivative of this code cannot be changed.  i.e. this code cannot simply be
55*0Sstevel@tonic-gate  * copied and put under another distribution licence
56*0Sstevel@tonic-gate  * [including the GNU Public Licence.]
57*0Sstevel@tonic-gate  */
58*0Sstevel@tonic-gate 
59*0Sstevel@tonic-gate /* Original version from Steven Schoch <schoch@sheba.arc.nasa.gov> */
60*0Sstevel@tonic-gate 
61*0Sstevel@tonic-gate #include <stdio.h>
62*0Sstevel@tonic-gate #include "cryptlib.h"
63*0Sstevel@tonic-gate #include <openssl/bn.h>
64*0Sstevel@tonic-gate #include <openssl/dsa.h>
65*0Sstevel@tonic-gate #include <openssl/rand.h>
66*0Sstevel@tonic-gate #include <openssl/asn1.h>
67*0Sstevel@tonic-gate #include <openssl/asn1_mac.h>
68*0Sstevel@tonic-gate 
DSA_do_verify(const unsigned char * dgst,int dgst_len,DSA_SIG * sig,DSA * dsa)69*0Sstevel@tonic-gate int DSA_do_verify(const unsigned char *dgst, int dgst_len, DSA_SIG *sig,
70*0Sstevel@tonic-gate 		  DSA *dsa)
71*0Sstevel@tonic-gate 	{
72*0Sstevel@tonic-gate 	return dsa->meth->dsa_do_verify(dgst, dgst_len, sig, dsa);
73*0Sstevel@tonic-gate 	}
74*0Sstevel@tonic-gate 
75*0Sstevel@tonic-gate /* data has already been hashed (probably with SHA or SHA-1). */
76*0Sstevel@tonic-gate /* returns
77*0Sstevel@tonic-gate  *      1: correct signature
78*0Sstevel@tonic-gate  *      0: incorrect signature
79*0Sstevel@tonic-gate  *     -1: error
80*0Sstevel@tonic-gate  */
DSA_verify(int type,const unsigned char * dgst,int dgst_len,const unsigned char * sigbuf,int siglen,DSA * dsa)81*0Sstevel@tonic-gate int DSA_verify(int type, const unsigned char *dgst, int dgst_len,
82*0Sstevel@tonic-gate 	     const unsigned char *sigbuf, int siglen, DSA *dsa)
83*0Sstevel@tonic-gate 	{
84*0Sstevel@tonic-gate 	DSA_SIG *s;
85*0Sstevel@tonic-gate 	int ret=-1;
86*0Sstevel@tonic-gate 
87*0Sstevel@tonic-gate 	s = DSA_SIG_new();
88*0Sstevel@tonic-gate 	if (s == NULL) return(ret);
89*0Sstevel@tonic-gate 	if (d2i_DSA_SIG(&s,&sigbuf,siglen) == NULL) goto err;
90*0Sstevel@tonic-gate 	ret=DSA_do_verify(dgst,dgst_len,s,dsa);
91*0Sstevel@tonic-gate err:
92*0Sstevel@tonic-gate 	DSA_SIG_free(s);
93*0Sstevel@tonic-gate 	return(ret);
94*0Sstevel@tonic-gate 	}
95