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
64 int 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
77 int 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
90 int 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
108 int 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 */
123 int 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 case NID_des_ede3_cfb64:
167 case NID_des_ede3_cfb8:
168 case NID_des_ede3_cfb1:
169
170 return NID_des_cfb64;
171
172 default:
173 /* Check it has an OID and it is valid */
174 otmp = OBJ_nid2obj(nid);
175 if(!otmp || !otmp->data) nid = NID_undef;
176 ASN1_OBJECT_free(otmp);
177 return nid;
178 }
179 }
180
181 int EVP_CIPHER_block_size(const EVP_CIPHER *e)
182 {
183 return e->block_size;
184 }
185
186 int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
187 {
188 return ctx->cipher->block_size;
189 }
190
191 int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl)
192 {
193 return ctx->cipher->do_cipher(ctx,out,in,inl);
194 }
195
196 const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
197 {
198 return ctx->cipher;
199 }
200
201 unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher)
202 {
203 return cipher->flags;
204 }
205
206 unsigned long EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx)
207 {
208 return ctx->cipher->flags;
209 }
210
211 void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
212 {
213 return ctx->app_data;
214 }
215
216 void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
217 {
218 ctx->app_data = data;
219 }
220
221 int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
222 {
223 return cipher->iv_len;
224 }
225
226 int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)
227 {
228 return ctx->cipher->iv_len;
229 }
230
231 int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
232 {
233 return cipher->key_len;
234 }
235
236 int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
237 {
238 return ctx->key_len;
239 }
240
241 int EVP_CIPHER_nid(const EVP_CIPHER *cipher)
242 {
243 return cipher->nid;
244 }
245
246 int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
247 {
248 return ctx->cipher->nid;
249 }
250
251 int EVP_MD_block_size(const EVP_MD *md)
252 {
253 return md->block_size;
254 }
255
256 int EVP_MD_type(const EVP_MD *md)
257 {
258 return md->type;
259 }
260
261 int EVP_MD_pkey_type(const EVP_MD *md)
262 {
263 return md->pkey_type;
264 }
265
266 int EVP_MD_size(const EVP_MD *md)
267 {
268 if (!md)
269 {
270 EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL);
271 return -1;
272 }
273 return md->md_size;
274 }
275
276 unsigned long EVP_MD_flags(const EVP_MD *md)
277 {
278 return md->flags;
279 }
280
281 const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
282 {
283 if (!ctx)
284 return NULL;
285 return ctx->digest;
286 }
287
288 void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
289 {
290 ctx->flags |= flags;
291 }
292
293 void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
294 {
295 ctx->flags &= ~flags;
296 }
297
298 int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
299 {
300 return (ctx->flags & flags);
301 }
302
303 void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
304 {
305 ctx->flags |= flags;
306 }
307
308 void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
309 {
310 ctx->flags &= ~flags;
311 }
312
313 int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
314 {
315 return (ctx->flags & flags);
316 }