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d02b48c6 | 1 | /* crypto/rsa/rsa_saos.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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. | |
0f113f3e | 8 | * |
d02b48c6 RE |
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). | |
0f113f3e | 15 | * |
d02b48c6 RE |
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. | |
0f113f3e | 22 | * |
d02b48c6 RE |
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 :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
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. | |
0f113f3e | 52 | * |
d02b48c6 RE |
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" | |
ec577822 BM |
61 | #include <openssl/bn.h> |
62 | #include <openssl/rsa.h> | |
63 | #include <openssl/objects.h> | |
64 | #include <openssl/x509.h> | |
d02b48c6 | 65 | |
29c1f061 | 66 | int RSA_sign_ASN1_OCTET_STRING(int type, |
0f113f3e MC |
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; | |
d02b48c6 | 74 | |
0f113f3e MC |
75 | sig.type = V_ASN1_OCTET_STRING; |
76 | sig.length = m_len; | |
77 | sig.data = (unsigned char *)m; | |
d02b48c6 | 78 | |
0f113f3e MC |
79 | i = i2d_ASN1_OCTET_STRING(&sig, NULL); |
80 | j = RSA_size(rsa); | |
81 | if (i > (j - RSA_PKCS1_PADDING_SIZE)) { | |
82 | RSAerr(RSA_F_RSA_SIGN_ASN1_OCTET_STRING, | |
83 | RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY); | |
84 | return (0); | |
85 | } | |
86 | s = (unsigned char *)OPENSSL_malloc((unsigned int)j + 1); | |
87 | if (s == NULL) { | |
88 | RSAerr(RSA_F_RSA_SIGN_ASN1_OCTET_STRING, ERR_R_MALLOC_FAILURE); | |
89 | return (0); | |
90 | } | |
91 | p = s; | |
92 | i2d_ASN1_OCTET_STRING(&sig, &p); | |
93 | i = RSA_private_encrypt(i, s, sigret, rsa, RSA_PKCS1_PADDING); | |
94 | if (i <= 0) | |
95 | ret = 0; | |
96 | else | |
97 | *siglen = i; | |
d02b48c6 | 98 | |
0f113f3e MC |
99 | OPENSSL_cleanse(s, (unsigned int)j + 1); |
100 | OPENSSL_free(s); | |
101 | return (ret); | |
102 | } | |
d02b48c6 | 103 | |
29c1f061 | 104 | int RSA_verify_ASN1_OCTET_STRING(int dtype, |
0f113f3e MC |
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; | |
d02b48c6 | 113 | |
0f113f3e MC |
114 | if (siglen != (unsigned int)RSA_size(rsa)) { |
115 | RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING, | |
116 | RSA_R_WRONG_SIGNATURE_LENGTH); | |
117 | return (0); | |
118 | } | |
d02b48c6 | 119 | |
0f113f3e MC |
120 | s = (unsigned char *)OPENSSL_malloc((unsigned int)siglen); |
121 | if (s == NULL) { | |
122 | RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING, ERR_R_MALLOC_FAILURE); | |
123 | goto err; | |
124 | } | |
125 | i = RSA_public_decrypt((int)siglen, sigbuf, s, rsa, RSA_PKCS1_PADDING); | |
d02b48c6 | 126 | |
0f113f3e MC |
127 | if (i <= 0) |
128 | goto err; | |
d02b48c6 | 129 | |
0f113f3e MC |
130 | p = s; |
131 | sig = d2i_ASN1_OCTET_STRING(NULL, &p, (long)i); | |
132 | if (sig == NULL) | |
133 | goto err; | |
d02b48c6 | 134 | |
0f113f3e MC |
135 | if (((unsigned int)sig->length != m_len) || |
136 | (memcmp(m, sig->data, m_len) != 0)) { | |
137 | RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING, RSA_R_BAD_SIGNATURE); | |
138 | } else | |
139 | ret = 1; | |
140 | err: | |
141 | if (sig != NULL) | |
142 | M_ASN1_OCTET_STRING_free(sig); | |
143 | if (s != NULL) { | |
144 | OPENSSL_cleanse(s, (unsigned int)siglen); | |
145 | OPENSSL_free(s); | |
146 | } | |
147 | return (ret); | |
148 | } |