]>
Commit | Line | Data |
---|---|---|
d02b48c6 | 1 | /* crypto/dsa/dsa_lib.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 | /* Origional version from Steven Schoch <schoch@sheba.arc.nasa.gov> */ | |
60 | ||
61 | #include <stdio.h> | |
62 | #include "cryptlib.h" | |
63 | #include "bn.h" | |
64 | #include "dsa.h" | |
65 | #include "asn1.h" | |
66 | ||
58964a49 | 67 | char *DSA_version="\0DSA part of SSLeay 0.9.0b 29-Jun-1998"; |
d02b48c6 RE |
68 | |
69 | DSA *DSA_new() | |
70 | { | |
71 | DSA *ret; | |
72 | ||
73 | ret=(DSA *)Malloc(sizeof(DSA)); | |
74 | if (ret == NULL) | |
75 | { | |
76 | DSAerr(DSA_F_DSA_NEW,ERR_R_MALLOC_FAILURE); | |
77 | return(NULL); | |
78 | } | |
79 | ret->pad=0; | |
80 | ret->version=0; | |
81 | ret->write_params=1; | |
82 | ret->p=NULL; | |
83 | ret->q=NULL; | |
84 | ret->g=NULL; | |
85 | ||
86 | ret->pub_key=NULL; | |
87 | ret->priv_key=NULL; | |
88 | ||
89 | ret->kinv=NULL; | |
90 | ret->r=NULL; | |
91 | ||
92 | ret->references=1; | |
93 | return(ret); | |
94 | } | |
95 | ||
96 | void DSA_free(r) | |
97 | DSA *r; | |
98 | { | |
99 | int i; | |
100 | ||
101 | if (r == NULL) return; | |
102 | ||
103 | i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_DSA); | |
58964a49 RE |
104 | #ifdef REF_PRINT |
105 | REF_PRINT("DSA",r); | |
106 | #endif | |
d02b48c6 RE |
107 | if (i > 0) return; |
108 | #ifdef REF_CHECK | |
109 | if (i < 0) | |
110 | { | |
111 | fprintf(stderr,"DSA_free, bad reference count\n"); | |
112 | abort(); | |
113 | } | |
114 | #endif | |
115 | ||
116 | if (r->p != NULL) BN_clear_free(r->p); | |
117 | if (r->q != NULL) BN_clear_free(r->q); | |
118 | if (r->g != NULL) BN_clear_free(r->g); | |
119 | if (r->pub_key != NULL) BN_clear_free(r->pub_key); | |
120 | if (r->priv_key != NULL) BN_clear_free(r->priv_key); | |
121 | if (r->kinv != NULL) BN_clear_free(r->kinv); | |
122 | if (r->r != NULL) BN_clear_free(r->r); | |
123 | Free(r); | |
124 | } | |
125 | ||
126 | int DSA_size(r) | |
127 | DSA *r; | |
128 | { | |
129 | int ret,i; | |
130 | ASN1_INTEGER bs; | |
131 | unsigned char buf[4]; | |
132 | ||
133 | i=BN_num_bits(r->q); | |
134 | bs.length=(i+7)/8; | |
135 | bs.data=buf; | |
136 | bs.type=V_ASN1_INTEGER; | |
137 | /* If the top bit is set the asn1 encoding is 1 larger. */ | |
138 | buf[0]=0xff; | |
139 | ||
140 | i=i2d_ASN1_INTEGER(&bs,NULL); | |
141 | i+=i; /* r and s */ | |
142 | ret=ASN1_object_size(1,i,V_ASN1_SEQUENCE); | |
143 | return(ret); | |
144 | } | |
145 |