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authorcvs2svn <admin@example.com>2009-06-25 14:33:51 +0000
committercvs2svn <admin@example.com>2009-06-25 14:33:51 +0000
commit3944e6efcea0baa7128a89353d149b37100c0ece (patch)
tree64c1ad6d7af88839fd67d630ca81c768fd1191cd /src/lib/libcrypto/evp/evp_lib.c
parent2eabc3aa42ad7d46a1723621f8e34e533342f67a (diff)
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1/* crypto/evp/evp_lib.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/evp.h>
62#include <openssl/objects.h>
63
64int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
65 {
66 int ret;
67
68 if (c->cipher->set_asn1_parameters != NULL)
69 ret=c->cipher->set_asn1_parameters(c,type);
70 else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1)
71 ret=EVP_CIPHER_set_asn1_iv(c, type);
72 else
73 ret=-1;
74 return(ret);
75 }
76
77int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
78 {
79 int ret;
80
81 if (c->cipher->get_asn1_parameters != NULL)
82 ret=c->cipher->get_asn1_parameters(c,type);
83 else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1)
84 ret=EVP_CIPHER_get_asn1_iv(c, type);
85 else
86 ret=-1;
87 return(ret);
88 }
89
90int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
91 {
92 int i=0;
93 unsigned int l;
94
95 if (type != NULL)
96 {
97 l=EVP_CIPHER_CTX_iv_length(c);
98 OPENSSL_assert(l <= sizeof(c->iv));
99 i=ASN1_TYPE_get_octetstring(type,c->oiv,l);
100 if (i != (int)l)
101 return(-1);
102 else if (i > 0)
103 memcpy(c->iv,c->oiv,l);
104 }
105 return(i);
106 }
107
108int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
109 {
110 int i=0;
111 unsigned int j;
112
113 if (type != NULL)
114 {
115 j=EVP_CIPHER_CTX_iv_length(c);
116 OPENSSL_assert(j <= sizeof(c->iv));
117 i=ASN1_TYPE_set_octetstring(type,c->oiv,j);
118 }
119 return(i);
120 }
121
122/* Convert the various cipher NIDs and dummies to a proper OID NID */
123int EVP_CIPHER_type(const EVP_CIPHER *ctx)
124{
125 int nid;
126 ASN1_OBJECT *otmp;
127 nid = EVP_CIPHER_nid(ctx);
128
129 switch(nid) {
130
131 case NID_rc2_cbc:
132 case NID_rc2_64_cbc:
133 case NID_rc2_40_cbc:
134
135 return NID_rc2_cbc;
136
137 case NID_rc4:
138 case NID_rc4_40:
139
140 return NID_rc4;
141
142 case NID_aes_128_cfb128:
143 case NID_aes_128_cfb8:
144 case NID_aes_128_cfb1:
145
146 return NID_aes_128_cfb128;
147
148 case NID_aes_192_cfb128:
149 case NID_aes_192_cfb8:
150 case NID_aes_192_cfb1:
151
152 return NID_aes_192_cfb128;
153
154 case NID_aes_256_cfb128:
155 case NID_aes_256_cfb8:
156 case NID_aes_256_cfb1:
157
158 return NID_aes_256_cfb128;
159
160 case NID_des_cfb64:
161 case NID_des_cfb8:
162 case NID_des_cfb1:
163
164 return NID_des_cfb64;
165
166 default:
167 /* Check it has an OID and it is valid */
168 otmp = OBJ_nid2obj(nid);
169 if(!otmp || !otmp->data) nid = NID_undef;
170 ASN1_OBJECT_free(otmp);
171 return nid;
172 }
173}
174
175int EVP_CIPHER_block_size(const EVP_CIPHER *e)
176 {
177 return e->block_size;
178 }
179
180int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
181 {
182 return ctx->cipher->block_size;
183 }
184
185const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
186 {
187 return ctx->cipher;
188 }
189
190unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher)
191 {
192 return cipher->flags;
193 }
194
195void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
196 {
197 return ctx->app_data;
198 }
199
200void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
201 {
202 ctx->app_data = data;
203 }
204
205int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
206 {
207 return cipher->iv_len;
208 }
209
210int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
211 {
212 return cipher->key_len;
213 }
214
215int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
216 {
217 return ctx->key_len;
218 }
219
220int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
221 {
222 return ctx->cipher->nid;
223 }
224
225int EVP_MD_block_size(const EVP_MD *md)
226 {
227 return md->block_size;
228 }
229
230int EVP_MD_type(const EVP_MD *md)
231 {
232 return md->type;
233 }
234
235int EVP_MD_pkey_type(const EVP_MD *md)
236 {
237 return md->pkey_type;
238 }
239
240int EVP_MD_size(const EVP_MD *md)
241 {
242 return md->md_size;
243 }
244
245const EVP_MD * EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
246 {
247 return ctx->digest;
248 }
249
250void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
251 {
252 ctx->flags |= flags;
253 }
254
255void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
256 {
257 ctx->flags &= ~flags;
258 }
259
260int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
261 {
262 return (ctx->flags & flags);
263 }
264
265void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
266 {
267 ctx->flags |= flags;
268 }
269
270void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
271 {
272 ctx->flags &= ~flags;
273 }
274
275int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
276 {
277 return (ctx->flags & flags);
278 }