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,
69 : RSA *rsa)
70 : {
71 : ASN1_OCTET_STRING sig;
72 : int i, j, ret = 1;
73 : unsigned char *p, *s;
74 :
75 0 : sig.type = V_ASN1_OCTET_STRING;
76 0 : sig.length = m_len;
77 0 : sig.data = (unsigned char *)m;
78 :
79 0 : i = i2d_ASN1_OCTET_STRING(&sig, NULL);
80 0 : j = RSA_size(rsa);
81 0 : if (i > (j - RSA_PKCS1_PADDING_SIZE)) {
82 0 : RSAerr(RSA_F_RSA_SIGN_ASN1_OCTET_STRING,
83 : RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY);
84 0 : return (0);
85 : }
86 0 : s = (unsigned char *)OPENSSL_malloc((unsigned int)j + 1);
87 0 : if (s == NULL) {
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,
107 : unsigned int siglen, RSA *rsa)
108 : {
109 : int i, ret = 0;
110 : unsigned char *s;
111 : const unsigned char *p;
112 : ASN1_OCTET_STRING *sig = NULL;
113 :
114 0 : if (siglen != (unsigned int)RSA_size(rsa)) {
115 0 : RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING,
116 : 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 0 : RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING, ERR_R_MALLOC_FAILURE);
123 0 : goto err;
124 : }
125 0 : i = RSA_public_decrypt((int)siglen, sigbuf, s, rsa, RSA_PKCS1_PADDING);
126 :
127 0 : if (i <= 0)
128 : goto err;
129 :
130 0 : p = s;
131 0 : sig = d2i_ASN1_OCTET_STRING(NULL, &p, (long)i);
132 0 : if (sig == NULL)
133 : goto err;
134 :
135 0 : if (((unsigned int)sig->length != m_len) ||
136 0 : (memcmp(m, sig->data, m_len) != 0)) {
137 0 : RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING, RSA_R_BAD_SIGNATURE);
138 : } else
139 : ret = 1;
140 : err:
141 0 : if (sig != NULL)
142 0 : M_ASN1_OCTET_STRING_free(sig);
143 0 : if (s != NULL) {
144 0 : OPENSSL_cleanse(s, (unsigned int)siglen);
145 0 : OPENSSL_free(s);
146 : }
147 0 : return (ret);
148 : }
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