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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
71 ret=-1;
72 return(ret);
73 }
74
75int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
76 {
77 int ret;
78
79 if (c->cipher->get_asn1_parameters != NULL)
80 ret=c->cipher->get_asn1_parameters(c,type);
81 else
82 ret=-1;
83 return(ret);
84 }
85
86int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
87 {
88 int i=0;
89 unsigned int l;
90
91 if (type != NULL)
92 {
93 l=EVP_CIPHER_CTX_iv_length(c);
94 OPENSSL_assert(l <= sizeof(c->iv));
95 i=ASN1_TYPE_get_octetstring(type,c->oiv,l);
96 if (i != (int)l)
97 return(-1);
98 else if (i > 0)
99 memcpy(c->iv,c->oiv,l);
100 }
101 return(i);
102 }
103
104int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
105 {
106 int i=0;
107 unsigned int j;
108
109 if (type != NULL)
110 {
111 j=EVP_CIPHER_CTX_iv_length(c);
112 OPENSSL_assert(j <= sizeof(c->iv));
113 i=ASN1_TYPE_set_octetstring(type,c->oiv,j);
114 }
115 return(i);
116 }
117
118/* Convert the various cipher NIDs and dummies to a proper OID NID */
119int EVP_CIPHER_type(const EVP_CIPHER *ctx)
120{
121 int nid;
122 ASN1_OBJECT *otmp;
123 nid = EVP_CIPHER_nid(ctx);
124
125 switch(nid) {
126
127 case NID_rc2_cbc:
128 case NID_rc2_64_cbc:
129 case NID_rc2_40_cbc:
130
131 return NID_rc2_cbc;
132
133 case NID_rc4:
134 case NID_rc4_40:
135
136 return NID_rc4;
137
138 case NID_aes_128_cfb128:
139 case NID_aes_128_cfb8:
140 case NID_aes_128_cfb1:
141
142 return NID_aes_128_cfb128;
143
144 case NID_aes_192_cfb128:
145 case NID_aes_192_cfb8:
146 case NID_aes_192_cfb1:
147
148 return NID_aes_192_cfb128;
149
150 case NID_aes_256_cfb128:
151 case NID_aes_256_cfb8:
152 case NID_aes_256_cfb1:
153
154 return NID_aes_256_cfb128;
155
156 case NID_des_cfb64:
157 case NID_des_cfb8:
158 case NID_des_cfb1:
159
160 return NID_des_cfb64;
161
162 case NID_des_ede3_cfb64:
163 case NID_des_ede3_cfb8:
164 case NID_des_ede3_cfb1:
165
166 return NID_des_cfb64;
167
168 default:
169 /* Check it has an OID and it is valid */
170 otmp = OBJ_nid2obj(nid);
171 if(!otmp || !otmp->data) nid = NID_undef;
172 ASN1_OBJECT_free(otmp);
173 return nid;
174 }
175}
176
177int EVP_CIPHER_block_size(const EVP_CIPHER *e)
178 {
179 return e->block_size;
180 }
181
182int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
183 {
184 return ctx->cipher->block_size;
185 }
186
187int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl)
188 {
189 return ctx->cipher->do_cipher(ctx,out,in,inl);
190 }
191
192const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
193 {
194 return ctx->cipher;
195 }
196
197unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher)
198 {
199 return cipher->flags;
200 }
201
202unsigned long EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx)
203 {
204 return ctx->cipher->flags;
205 }
206
207void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
208 {
209 return ctx->app_data;
210 }
211
212void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
213 {
214 ctx->app_data = data;
215 }
216
217int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
218 {
219 return cipher->iv_len;
220 }
221
222int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)
223 {
224 return ctx->cipher->iv_len;
225 }
226
227int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
228 {
229 return cipher->key_len;
230 }
231
232int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
233 {
234 return ctx->key_len;
235 }
236
237int EVP_CIPHER_nid(const EVP_CIPHER *cipher)
238 {
239 return cipher->nid;
240 }
241
242int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
243 {
244 return ctx->cipher->nid;
245 }
246
247int EVP_MD_block_size(const EVP_MD *md)
248 {
249 return md->block_size;
250 }
251
252int EVP_MD_type(const EVP_MD *md)
253 {
254 return md->type;
255 }
256
257int EVP_MD_pkey_type(const EVP_MD *md)
258 {
259 return md->pkey_type;
260 }
261
262int EVP_MD_size(const EVP_MD *md)
263 {
264 if (!md)
265 {
266 EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL);
267 return -1;
268 }
269 return md->md_size;
270 }
271
272unsigned long EVP_MD_flags(const EVP_MD *md)
273 {
274 return md->flags;
275 }
276
277const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
278 {
279 if (!ctx)
280 return NULL;
281 return ctx->digest;
282 }
283
284void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
285 {
286 ctx->flags |= flags;
287 }
288
289void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
290 {
291 ctx->flags &= ~flags;
292 }
293
294int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
295 {
296 return (ctx->flags & flags);
297 }
298
299void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
300 {
301 ctx->flags |= flags;
302 }
303
304void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
305 {
306 ctx->flags &= ~flags;
307 }
308
309int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
310 {
311 return (ctx->flags & flags);
312 }
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