Branch data Line data Source code
1 : : /* crypto/rsa/rsa_saos.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 : 0 : int RSA_sign_ASN1_OCTET_STRING(int type,
67 : : const unsigned char *m, unsigned int m_len,
68 : : unsigned char *sigret, unsigned int *siglen, RSA *rsa)
69 : : {
70 : : ASN1_OCTET_STRING sig;
71 : 0 : int i,j,ret=1;
72 : : unsigned char *p,*s;
73 : :
74 : 0 : sig.type=V_ASN1_OCTET_STRING;
75 : 0 : sig.length=m_len;
76 : 0 : sig.data=(unsigned char *)m;
77 : :
78 : 0 : i=i2d_ASN1_OCTET_STRING(&sig,NULL);
79 : 0 : j=RSA_size(rsa);
80 [ # # ]: 0 : if (i > (j-RSA_PKCS1_PADDING_SIZE))
81 : : {
82 : 0 : RSAerr(RSA_F_RSA_SIGN_ASN1_OCTET_STRING,RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY);
83 : 0 : return(0);
84 : : }
85 : 0 : s=(unsigned char *)OPENSSL_malloc((unsigned int)j+1);
86 [ # # ]: 0 : if (s == NULL)
87 : : {
88 : 0 : RSAerr(RSA_F_RSA_SIGN_ASN1_OCTET_STRING,ERR_R_MALLOC_FAILURE);
89 : 0 : return(0);
90 : : }
91 : 0 : p=s;
92 : 0 : i2d_ASN1_OCTET_STRING(&sig,&p);
93 : 0 : i=RSA_private_encrypt(i,s,sigret,rsa,RSA_PKCS1_PADDING);
94 [ # # ]: 0 : if (i <= 0)
95 : : ret=0;
96 : : else
97 : 0 : *siglen=i;
98 : :
99 : 0 : OPENSSL_cleanse(s,(unsigned int)j+1);
100 : 0 : OPENSSL_free(s);
101 : 0 : return(ret);
102 : : }
103 : :
104 : 0 : int RSA_verify_ASN1_OCTET_STRING(int dtype,
105 : : const unsigned char *m,
106 : : unsigned int m_len, unsigned char *sigbuf, unsigned int siglen,
107 : : RSA *rsa)
108 : : {
109 : 0 : int i,ret=0;
110 : : unsigned char *s;
111 : : const unsigned char *p;
112 : 0 : ASN1_OCTET_STRING *sig=NULL;
113 : :
114 [ # # ]: 0 : if (siglen != (unsigned int)RSA_size(rsa))
115 : : {
116 : 0 : RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING,RSA_R_WRONG_SIGNATURE_LENGTH);
117 : 0 : return(0);
118 : : }
119 : :
120 : 0 : s=(unsigned char *)OPENSSL_malloc((unsigned int)siglen);
121 [ # # ]: 0 : if (s == NULL)
122 : : {
123 : 0 : RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING,ERR_R_MALLOC_FAILURE);
124 : 0 : goto err;
125 : : }
126 : 0 : i=RSA_public_decrypt((int)siglen,sigbuf,s,rsa,RSA_PKCS1_PADDING);
127 : :
128 [ # # ]: 0 : if (i <= 0) goto err;
129 : :
130 : 0 : p=s;
131 : 0 : sig=d2i_ASN1_OCTET_STRING(NULL,&p,(long)i);
132 [ # # ]: 0 : if (sig == NULL) goto err;
133 : :
134 [ # # ][ # # ]: 0 : if ( ((unsigned int)sig->length != m_len) ||
135 : 0 : (memcmp(m,sig->data,m_len) != 0))
136 : : {
137 : 0 : RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING,RSA_R_BAD_SIGNATURE);
138 : : }
139 : : else
140 : : ret=1;
141 : : err:
142 [ # # ]: 0 : if (sig != NULL) M_ASN1_OCTET_STRING_free(sig);
143 [ # # ]: 0 : if (s != NULL)
144 : : {
145 : 0 : OPENSSL_cleanse(s,(unsigned int)siglen);
146 : 0 : OPENSSL_free(s);
147 : : }
148 : 0 : return(ret);
149 : : }
150 : :
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