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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 <openssl/bn.h>
62#include <openssl/rsa.h>
63#include <openssl/objects.h>
64#include <openssl/x509.h>
65
66/* Size of an SSL signature: MD5+SHA1 */
67#define SSL_SIG_LENGTH 36
68
69int RSA_sign(int type, unsigned char *m, unsigned int m_len,
70 unsigned char *sigret, unsigned int *siglen, RSA *rsa)
71 {
72 X509_SIG sig;
73 ASN1_TYPE parameter;
74 int i,j,ret=1;
75 unsigned char *p,*s = NULL;
76 X509_ALGOR algor;
77 ASN1_OCTET_STRING digest;
78 if(rsa->flags & RSA_FLAG_SIGN_VER)
79 return rsa->meth->rsa_sign(type, m, m_len, sigret, siglen, rsa);
80 /* Special case: SSL signature, just check the length */
81 if(type == NID_md5_sha1) {
82 if(m_len != SSL_SIG_LENGTH) {
83 RSAerr(RSA_F_RSA_SIGN,RSA_R_INVALID_MESSAGE_LENGTH);
84 return(0);
85 }
86 i = SSL_SIG_LENGTH;
87 s = m;
88 } else {
89 sig.algor= &algor;
90 sig.algor->algorithm=OBJ_nid2obj(type);
91 if (sig.algor->algorithm == NULL)
92 {
93 RSAerr(RSA_F_RSA_SIGN,RSA_R_UNKNOWN_ALGORITHM_TYPE);
94 return(0);
95 }
96 if (sig.algor->algorithm->length == 0)
97 {
98 RSAerr(RSA_F_RSA_SIGN,RSA_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
99 return(0);
100 }
101 parameter.type=V_ASN1_NULL;
102 parameter.value.ptr=NULL;
103 sig.algor->parameter= &parameter;
104
105 sig.digest= &digest;
106 sig.digest->data=m;
107 sig.digest->length=m_len;
108
109 i=i2d_X509_SIG(&sig,NULL);
110 }
111 j=RSA_size(rsa);
112 if ((i-RSA_PKCS1_PADDING) > j)
113 {
114 RSAerr(RSA_F_RSA_SIGN,RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY);
115 return(0);
116 }
117 if(type != NID_md5_sha1) {
118 s=(unsigned char *)Malloc((unsigned int)j+1);
119 if (s == NULL)
120 {
121 RSAerr(RSA_F_RSA_SIGN,ERR_R_MALLOC_FAILURE);
122 return(0);
123 }
124 p=s;
125 i2d_X509_SIG(&sig,&p);
126 }
127 i=RSA_private_encrypt(i,s,sigret,rsa,RSA_PKCS1_PADDING);
128 if (i <= 0)
129 ret=0;
130 else
131 *siglen=i;
132
133 if(type != NID_md5_sha1) {
134 memset(s,0,(unsigned int)j+1);
135 Free(s);
136 }
137 return(ret);
138 }
139
140int RSA_verify(int dtype, unsigned char *m, unsigned int m_len,
141 unsigned char *sigbuf, unsigned int siglen, RSA *rsa)
142 {
143 int i,ret=0,sigtype;
144 unsigned char *p,*s;
145 X509_SIG *sig=NULL;
146
147 if (siglen != (unsigned int)RSA_size(rsa))
148 {
149 RSAerr(RSA_F_RSA_VERIFY,RSA_R_WRONG_SIGNATURE_LENGTH);
150 return(0);
151 }
152
153 if(rsa->flags & RSA_FLAG_SIGN_VER)
154 return rsa->meth->rsa_verify(dtype, m, m_len, sigbuf, siglen, rsa);
155
156 s=(unsigned char *)Malloc((unsigned int)siglen);
157 if (s == NULL)
158 {
159 RSAerr(RSA_F_RSA_VERIFY,ERR_R_MALLOC_FAILURE);
160 goto err;
161 }
162 if((dtype == NID_md5_sha1) && (m_len != SSL_SIG_LENGTH) ) {
163 RSAerr(RSA_F_RSA_VERIFY,RSA_R_INVALID_MESSAGE_LENGTH);
164 return(0);
165 }
166 i=RSA_public_decrypt((int)siglen,sigbuf,s,rsa,RSA_PKCS1_PADDING);
167
168 if (i <= 0) goto err;
169
170 /* Special case: SSL signature */
171 if(dtype == NID_md5_sha1) {
172 if((i != SSL_SIG_LENGTH) || memcmp(s, m, SSL_SIG_LENGTH))
173 RSAerr(RSA_F_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
174 else ret = 1;
175 } else {
176 p=s;
177 sig=d2i_X509_SIG(NULL,&p,(long)i);
178
179 if (sig == NULL) goto err;
180 sigtype=OBJ_obj2nid(sig->algor->algorithm);
181
182
183 #ifdef RSA_DEBUG
184 /* put a backward compatibility flag in EAY */
185 fprintf(stderr,"in(%s) expect(%s)\n",OBJ_nid2ln(sigtype),
186 OBJ_nid2ln(dtype));
187 #endif
188 if (sigtype != dtype)
189 {
190 if (((dtype == NID_md5) &&
191 (sigtype == NID_md5WithRSAEncryption)) ||
192 ((dtype == NID_md2) &&
193 (sigtype == NID_md2WithRSAEncryption)))
194 {
195 /* ok, we will let it through */
196 #if !defined(NO_STDIO) && !defined(WIN16)
197 fprintf(stderr,"signature has problems, re-make with post SSLeay045\n");
198 #endif
199 }
200 else
201 {
202 RSAerr(RSA_F_RSA_VERIFY,
203 RSA_R_ALGORITHM_MISMATCH);
204 goto err;
205 }
206 }
207 if ( ((unsigned int)sig->digest->length != m_len) ||
208 (memcmp(m,sig->digest->data,m_len) != 0))
209 {
210 RSAerr(RSA_F_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
211 }
212 else
213 ret=1;
214 }
215err:
216 if (sig != NULL) X509_SIG_free(sig);
217 memset(s,0,(unsigned int)siglen);
218 Free(s);
219 return(ret);
220 }
221
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