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
EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX * c,ASN1_TYPE * type)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
EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX * c,ASN1_TYPE * type)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
EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX * c,ASN1_TYPE * type)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 l = EVP_CIPHER_CTX_iv_length(c);
97 OPENSSL_assert(l <= sizeof(c->iv));
98 i = ASN1_TYPE_get_octetstring(type, c->oiv, l);
99 if (i != (int)l)
100 return (-1);
101 else if (i > 0)
102 memcpy(c->iv, c->oiv, l);
103 }
104 return (i);
105 }
106
EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX * c,ASN1_TYPE * type)107 int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
108 {
109 int i = 0;
110 unsigned int j;
111
112 if (type != NULL) {
113 j = EVP_CIPHER_CTX_iv_length(c);
114 OPENSSL_assert(j <= sizeof(c->iv));
115 i = ASN1_TYPE_set_octetstring(type, c->oiv, j);
116 }
117 return (i);
118 }
119
120 /* Convert the various cipher NIDs and dummies to a proper OID NID */
EVP_CIPHER_type(const EVP_CIPHER * ctx)121 int EVP_CIPHER_type(const EVP_CIPHER *ctx)
122 {
123 int nid;
124 ASN1_OBJECT *otmp;
125 nid = EVP_CIPHER_nid(ctx);
126
127 switch (nid) {
128
129 case NID_rc2_cbc:
130 case NID_rc2_64_cbc:
131 case NID_rc2_40_cbc:
132
133 return NID_rc2_cbc;
134
135 case NID_rc4:
136 case NID_rc4_40:
137
138 return NID_rc4;
139
140 case NID_aes_128_cfb128:
141 case NID_aes_128_cfb8:
142 case NID_aes_128_cfb1:
143
144 return NID_aes_128_cfb128;
145
146 case NID_aes_192_cfb128:
147 case NID_aes_192_cfb8:
148 case NID_aes_192_cfb1:
149
150 return NID_aes_192_cfb128;
151
152 case NID_aes_256_cfb128:
153 case NID_aes_256_cfb8:
154 case NID_aes_256_cfb1:
155
156 return NID_aes_256_cfb128;
157
158 case NID_des_cfb64:
159 case NID_des_cfb8:
160 case NID_des_cfb1:
161
162 return NID_des_cfb64;
163
164 case NID_des_ede3_cfb64:
165 case NID_des_ede3_cfb8:
166 case NID_des_ede3_cfb1:
167
168 return NID_des_cfb64;
169
170 default:
171 /* Check it has an OID and it is valid */
172 otmp = OBJ_nid2obj(nid);
173 if (!otmp || !otmp->data)
174 nid = NID_undef;
175 ASN1_OBJECT_free(otmp);
176 return nid;
177 }
178 }
179
EVP_CIPHER_block_size(const EVP_CIPHER * e)180 int EVP_CIPHER_block_size(const EVP_CIPHER *e)
181 {
182 return e->block_size;
183 }
184
EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX * ctx)185 int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
186 {
187 return ctx->cipher->block_size;
188 }
189
EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX * ctx)190 const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
191 {
192 return ctx->cipher;
193 }
194
EVP_CIPHER_flags(const EVP_CIPHER * cipher)195 unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher)
196 {
197 return cipher->flags;
198 }
199
EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX * ctx)200 void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
201 {
202 return ctx->app_data;
203 }
204
EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX * ctx,void * data)205 void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
206 {
207 ctx->app_data = data;
208 }
209
EVP_CIPHER_iv_length(const EVP_CIPHER * cipher)210 int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
211 {
212 return cipher->iv_len;
213 }
214
EVP_CIPHER_key_length(const EVP_CIPHER * cipher)215 int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
216 {
217 return cipher->key_len;
218 }
219
EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX * ctx)220 int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
221 {
222 return ctx->key_len;
223 }
224
EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX * ctx)225 int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
226 {
227 return ctx->cipher->nid;
228 }
229
EVP_MD_block_size(const EVP_MD * md)230 int EVP_MD_block_size(const EVP_MD *md)
231 {
232 return md->block_size;
233 }
234
EVP_MD_type(const EVP_MD * md)235 int EVP_MD_type(const EVP_MD *md)
236 {
237 return md->type;
238 }
239
EVP_MD_pkey_type(const EVP_MD * md)240 int EVP_MD_pkey_type(const EVP_MD *md)
241 {
242 return md->pkey_type;
243 }
244
EVP_MD_size(const EVP_MD * md)245 int EVP_MD_size(const EVP_MD *md)
246 {
247 return md->md_size;
248 }
249
EVP_MD_CTX_md(const EVP_MD_CTX * ctx)250 const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
251 {
252 return ctx->digest;
253 }
254
EVP_MD_CTX_set_flags(EVP_MD_CTX * ctx,int flags)255 void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
256 {
257 ctx->flags |= flags;
258 }
259
EVP_MD_CTX_clear_flags(EVP_MD_CTX * ctx,int flags)260 void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
261 {
262 ctx->flags &= ~flags;
263 }
264
EVP_MD_CTX_test_flags(const EVP_MD_CTX * ctx,int flags)265 int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
266 {
267 return (ctx->flags & flags);
268 }
269
EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX * ctx,int flags)270 void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
271 {
272 ctx->flags |= flags;
273 }
274
EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX * ctx,int flags)275 void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
276 {
277 ctx->flags &= ~flags;
278 }
279
EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX * ctx,int flags)280 int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
281 {
282 return (ctx->flags & flags);
283 }
284