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