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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. | |
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 | ||
66 | int RSA_sign_ASN1_OCTET_STRING(type,m,m_len,sigret,siglen,rsa) | |
67 | int type; | |
68 | unsigned char *m; | |
69 | unsigned int m_len; | |
70 | unsigned char *sigret; | |
71 | unsigned int *siglen; | |
72 | RSA *rsa; | |
73 | { | |
74 | ASN1_OCTET_STRING sig; | |
75 | int i,j,ret=1; | |
76 | unsigned char *p,*s; | |
77 | ||
78 | sig.type=V_ASN1_OCTET_STRING; | |
79 | sig.length=m_len; | |
80 | sig.data=m; | |
81 | ||
82 | i=i2d_ASN1_OCTET_STRING(&sig,NULL); | |
83 | j=RSA_size(rsa); | |
84 | if ((i-RSA_PKCS1_PADDING) > j) | |
85 | { | |
86 | RSAerr(RSA_F_RSA_SIGN_ASN1_OCTET_STRING,RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY); | |
87 | return(0); | |
88 | } | |
89 | s=(unsigned char *)Malloc((unsigned int)j+1); | |
90 | if (s == NULL) | |
91 | { | |
92 | RSAerr(RSA_F_RSA_SIGN_ASN1_OCTET_STRING,ERR_R_MALLOC_FAILURE); | |
93 | return(0); | |
94 | } | |
95 | p=s; | |
96 | i2d_ASN1_OCTET_STRING(&sig,&p); | |
97 | i=RSA_private_encrypt(i,s,sigret,rsa,RSA_PKCS1_PADDING); | |
98 | if (i <= 0) | |
99 | ret=0; | |
100 | else | |
101 | *siglen=i; | |
102 | ||
103 | memset(s,0,(unsigned int)j+1); | |
104 | Free(s); | |
105 | return(ret); | |
106 | } | |
107 | ||
108 | int RSA_verify_ASN1_OCTET_STRING(dtype, m, m_len, sigbuf, siglen, rsa) | |
109 | int dtype; | |
110 | unsigned char *m; | |
111 | unsigned int m_len; | |
112 | unsigned char *sigbuf; | |
113 | unsigned int siglen; | |
114 | RSA *rsa; | |
115 | { | |
116 | int i,ret=0; | |
117 | unsigned char *p,*s; | |
118 | ASN1_OCTET_STRING *sig=NULL; | |
119 | ||
120 | if (siglen != (unsigned int)RSA_size(rsa)) | |
121 | { | |
122 | RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING,RSA_R_WRONG_SIGNATURE_LENGTH); | |
123 | return(0); | |
124 | } | |
125 | ||
126 | s=(unsigned char *)Malloc((unsigned int)siglen); | |
127 | if (s == NULL) | |
128 | { | |
129 | RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING,ERR_R_MALLOC_FAILURE); | |
130 | goto err; | |
131 | } | |
132 | i=RSA_public_decrypt((int)siglen,sigbuf,s,rsa,RSA_PKCS1_PADDING); | |
133 | ||
134 | if (i <= 0) goto err; | |
135 | ||
136 | p=s; | |
137 | sig=d2i_ASN1_OCTET_STRING(NULL,&p,(long)i); | |
138 | if (sig == NULL) goto err; | |
139 | ||
140 | if ( ((unsigned int)sig->length != m_len) || | |
141 | (memcmp(m,sig->data,m_len) != 0)) | |
142 | { | |
143 | RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING,RSA_R_BAD_SIGNATURE); | |
144 | } | |
145 | else | |
146 | ret=1; | |
147 | err: | |
148 | if (sig != NULL) ASN1_OCTET_STRING_free(sig); | |
149 | memset(s,0,(unsigned int)siglen); | |
150 | Free(s); | |
151 | return(ret); | |
152 | } | |
153 |