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authorryker <>1998-10-05 20:13:14 +0000
committerryker <>1998-10-05 20:13:14 +0000
commitaeeae06a79815dc190061534d47236cec09f9e32 (patch)
tree851692b9c2f9c04f077666855641900f19fdb217 /src/lib/libcrypto/rsa/rsa_sign.c
parenta4f79641824cbf9f60ca9d1168d1fcc46717a82a (diff)
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Import of SSLeay-0.9.0b with RSA and IDEA stubbed + OpenBSD build
functionality for shared libs. Note that routines such as sslv2_init and friends that use RSA will not work due to lack of RSA in this library. Needs documentation and help from ports for easy upgrade to full functionality where legally possible.
Diffstat (limited to 'src/lib/libcrypto/rsa/rsa_sign.c')
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1 files changed, 196 insertions, 0 deletions
diff --git a/src/lib/libcrypto/rsa/rsa_sign.c b/src/lib/libcrypto/rsa/rsa_sign.c
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1/* crypto/rsa/rsa_sign.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <stdio.h>
60#include "cryptlib.h"
61#include "bn.h"
62#include "rsa.h"
63#include "objects.h"
64#include "x509.h"
65
66int RSA_sign(type,m,m_len,sigret,siglen,rsa)
67int type;
68unsigned char *m;
69unsigned int m_len;
70unsigned char *sigret;
71unsigned int *siglen;
72RSA *rsa;
73 {
74 X509_SIG sig;
75 ASN1_TYPE parameter;
76 int i,j,ret=1;
77 unsigned char *p,*s;
78 X509_ALGOR algor;
79 ASN1_OCTET_STRING digest;
80
81 sig.algor= &algor;
82 sig.algor->algorithm=OBJ_nid2obj(type);
83 if (sig.algor->algorithm == NULL)
84 {
85 RSAerr(RSA_F_RSA_SIGN,RSA_R_UNKNOWN_ALGORITHM_TYPE);
86 return(0);
87 }
88 if (sig.algor->algorithm->length == 0)
89 {
90 RSAerr(RSA_F_RSA_SIGN,RSA_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
91 return(0);
92 }
93 parameter.type=V_ASN1_NULL;
94 parameter.value.ptr=NULL;
95 sig.algor->parameter= &parameter;
96
97 sig.digest= &digest;
98 sig.digest->data=m;
99 sig.digest->length=m_len;
100
101 i=i2d_X509_SIG(&sig,NULL);
102 j=RSA_size(rsa);
103 if ((i-RSA_PKCS1_PADDING) > j)
104 {
105 RSAerr(RSA_F_RSA_SIGN,RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY);
106 return(0);
107 }
108 s=(unsigned char *)Malloc((unsigned int)j+1);
109 if (s == NULL)
110 {
111 RSAerr(RSA_F_RSA_SIGN,ERR_R_MALLOC_FAILURE);
112 return(0);
113 }
114 p=s;
115 i2d_X509_SIG(&sig,&p);
116 i=RSA_private_encrypt(i,s,sigret,rsa,RSA_PKCS1_PADDING);
117 if (i <= 0)
118 ret=0;
119 else
120 *siglen=i;
121
122 memset(s,0,(unsigned int)j+1);
123 Free(s);
124 return(ret);
125 }
126
127int RSA_verify(dtype, m, m_len, sigbuf, siglen, rsa)
128int dtype;
129unsigned char *m;
130unsigned int m_len;
131unsigned char *sigbuf;
132unsigned int siglen;
133RSA *rsa;
134 {
135 int i,ret=0,sigtype;
136 unsigned char *p,*s;
137 X509_SIG *sig=NULL;
138
139 if (siglen != (unsigned int)RSA_size(rsa))
140 {
141 RSAerr(RSA_F_RSA_VERIFY,RSA_R_WRONG_SIGNATURE_LENGTH);
142 return(0);
143 }
144
145 s=(unsigned char *)Malloc((unsigned int)siglen);
146 if (s == NULL)
147 {
148 RSAerr(RSA_F_RSA_VERIFY,ERR_R_MALLOC_FAILURE);
149 goto err;
150 }
151 i=RSA_public_decrypt((int)siglen,sigbuf,s,rsa,RSA_PKCS1_PADDING);
152
153 if (i <= 0) goto err;
154
155 p=s;
156 sig=d2i_X509_SIG(NULL,&p,(long)i);
157 if (sig == NULL) goto err;
158 sigtype=OBJ_obj2nid(sig->algor->algorithm);
159
160#ifdef RSA_DEBUG
161 /* put a backward compatability flag in EAY */
162 fprintf(stderr,"in(%s) expect(%s)\n",OBJ_nid2ln(sigtype),
163 OBJ_nid2ln(dtype));
164#endif
165 if (sigtype != dtype)
166 {
167 if (((dtype == NID_md5) &&
168 (sigtype == NID_md5WithRSAEncryption)) ||
169 ((dtype == NID_md2) &&
170 (sigtype == NID_md2WithRSAEncryption)))
171 {
172 /* ok, we will let it through */
173#if !defined(NO_STDIO) && !defined(WIN16)
174 fprintf(stderr,"signature has problems, re-make with post SSLeay045\n");
175#endif
176 }
177 else
178 {
179 RSAerr(RSA_F_RSA_VERIFY,RSA_R_ALGORITHM_MISMATCH);
180 goto err;
181 }
182 }
183 if ( ((unsigned int)sig->digest->length != m_len) ||
184 (memcmp(m,sig->digest->data,m_len) != 0))
185 {
186 RSAerr(RSA_F_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
187 }
188 else
189 ret=1;
190err:
191 if (sig != NULL) X509_SIG_free(sig);
192 memset(s,0,(unsigned int)siglen);
193 Free(s);
194 return(ret);
195 }
196