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58964a49 RE |
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" | |
ec577822 BM |
61 | #include <openssl/evp.h> |
62 | #include <openssl/objects.h> | |
58964a49 | 63 | |
6b691a5c | 64 | int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type) |
58964a49 RE |
65 | { |
66 | int ret; | |
67 | ||
68 | if (c->cipher->set_asn1_parameters != NULL) | |
69 | ret=c->cipher->set_asn1_parameters(c,type); | |
7a4bd34a | 70 | else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) |
e61f5d55 DSH |
71 | { |
72 | if (EVP_CIPHER_CTX_mode(c) == EVP_CIPH_WRAP_MODE) | |
73 | { | |
74 | ASN1_TYPE_set(type, V_ASN1_NULL, NULL); | |
75 | ret = 1; | |
76 | } | |
77 | else | |
78 | ret=EVP_CIPHER_set_asn1_iv(c, type); | |
79 | } | |
58964a49 | 80 | else |
c39c32dd | 81 | ret=-1; |
58964a49 RE |
82 | return(ret); |
83 | } | |
84 | ||
6b691a5c | 85 | int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type) |
58964a49 RE |
86 | { |
87 | int ret; | |
88 | ||
89 | if (c->cipher->get_asn1_parameters != NULL) | |
90 | ret=c->cipher->get_asn1_parameters(c,type); | |
83e9c362 | 91 | else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) |
e61f5d55 DSH |
92 | { |
93 | if (EVP_CIPHER_CTX_mode(c) == EVP_CIPH_WRAP_MODE) | |
94 | return 1; | |
83e9c362 | 95 | ret=EVP_CIPHER_get_asn1_iv(c, type); |
e61f5d55 | 96 | } |
58964a49 | 97 | else |
c39c32dd | 98 | ret=-1; |
58964a49 RE |
99 | return(ret); |
100 | } | |
101 | ||
6b691a5c | 102 | int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) |
58964a49 | 103 | { |
27545970 GT |
104 | int i=0; |
105 | unsigned int l; | |
58964a49 RE |
106 | |
107 | if (type != NULL) | |
108 | { | |
109 | l=EVP_CIPHER_CTX_iv_length(c); | |
27545970 | 110 | OPENSSL_assert(l <= sizeof(c->iv)); |
58964a49 | 111 | i=ASN1_TYPE_get_octetstring(type,c->oiv,l); |
27545970 | 112 | if (i != (int)l) |
dfeab068 RE |
113 | return(-1); |
114 | else if (i > 0) | |
115 | memcpy(c->iv,c->oiv,l); | |
58964a49 RE |
116 | } |
117 | return(i); | |
118 | } | |
119 | ||
6b691a5c | 120 | int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) |
58964a49 | 121 | { |
27545970 GT |
122 | int i=0; |
123 | unsigned int j; | |
58964a49 RE |
124 | |
125 | if (type != NULL) | |
126 | { | |
127 | j=EVP_CIPHER_CTX_iv_length(c); | |
27545970 | 128 | OPENSSL_assert(j <= sizeof(c->iv)); |
58964a49 RE |
129 | i=ASN1_TYPE_set_octetstring(type,c->oiv,j); |
130 | } | |
131 | return(i); | |
132 | } | |
884e8ec6 DSH |
133 | |
134 | /* Convert the various cipher NIDs and dummies to a proper OID NID */ | |
84fa704c | 135 | int EVP_CIPHER_type(const EVP_CIPHER *ctx) |
884e8ec6 DSH |
136 | { |
137 | int nid; | |
4b426580 | 138 | ASN1_OBJECT *otmp; |
884e8ec6 DSH |
139 | nid = EVP_CIPHER_nid(ctx); |
140 | ||
141 | switch(nid) { | |
142 | ||
143 | case NID_rc2_cbc: | |
144 | case NID_rc2_64_cbc: | |
145 | case NID_rc2_40_cbc: | |
146 | ||
147 | return NID_rc2_cbc; | |
148 | ||
149 | case NID_rc4: | |
150 | case NID_rc4_40: | |
151 | ||
152 | return NID_rc4; | |
153 | ||
8d1ebe0b RL |
154 | case NID_aes_128_cfb128: |
155 | case NID_aes_128_cfb8: | |
156 | case NID_aes_128_cfb1: | |
157 | ||
158 | return NID_aes_128_cfb128; | |
159 | ||
160 | case NID_aes_192_cfb128: | |
161 | case NID_aes_192_cfb8: | |
162 | case NID_aes_192_cfb1: | |
163 | ||
164 | return NID_aes_192_cfb128; | |
165 | ||
166 | case NID_aes_256_cfb128: | |
167 | case NID_aes_256_cfb8: | |
168 | case NID_aes_256_cfb1: | |
169 | ||
170 | return NID_aes_256_cfb128; | |
171 | ||
172 | case NID_des_cfb64: | |
173 | case NID_des_cfb8: | |
174 | case NID_des_cfb1: | |
175 | ||
176 | return NID_des_cfb64; | |
177 | ||
7e765bf2 DSH |
178 | case NID_des_ede3_cfb64: |
179 | case NID_des_ede3_cfb8: | |
180 | case NID_des_ede3_cfb1: | |
181 | ||
182 | return NID_des_cfb64; | |
183 | ||
884e8ec6 | 184 | default: |
4b426580 DSH |
185 | /* Check it has an OID and it is valid */ |
186 | otmp = OBJ_nid2obj(nid); | |
187 | if(!otmp || !otmp->data) nid = NID_undef; | |
188 | ASN1_OBJECT_free(otmp); | |
884e8ec6 DSH |
189 | return nid; |
190 | } | |
191 | } | |
192 | ||
6343829a | 193 | int EVP_CIPHER_block_size(const EVP_CIPHER *e) |
7806f3dd NL |
194 | { |
195 | return e->block_size; | |
196 | } | |
197 | ||
6343829a | 198 | int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx) |
7806f3dd NL |
199 | { |
200 | return ctx->cipher->block_size; | |
201 | } | |
202 | ||
6343829a | 203 | int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl) |
7806f3dd NL |
204 | { |
205 | return ctx->cipher->do_cipher(ctx,out,in,inl); | |
206 | } | |
207 | ||
208 | const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx) | |
209 | { | |
210 | return ctx->cipher; | |
211 | } | |
212 | ||
213 | unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher) | |
214 | { | |
215 | return cipher->flags; | |
216 | } | |
217 | ||
218 | unsigned long EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx) | |
219 | { | |
220 | return ctx->cipher->flags; | |
221 | } | |
222 | ||
223 | void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx) | |
224 | { | |
225 | return ctx->app_data; | |
226 | } | |
227 | ||
228 | void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data) | |
229 | { | |
230 | ctx->app_data = data; | |
231 | } | |
232 | ||
6343829a | 233 | int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher) |
7806f3dd NL |
234 | { |
235 | return cipher->iv_len; | |
236 | } | |
237 | ||
6343829a | 238 | int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx) |
7806f3dd NL |
239 | { |
240 | return ctx->cipher->iv_len; | |
241 | } | |
242 | ||
6343829a | 243 | int EVP_CIPHER_key_length(const EVP_CIPHER *cipher) |
7806f3dd NL |
244 | { |
245 | return cipher->key_len; | |
246 | } | |
247 | ||
6343829a | 248 | int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx) |
7806f3dd | 249 | { |
6e7ca5e1 | 250 | return ctx->key_len; |
7806f3dd NL |
251 | } |
252 | ||
253 | int EVP_CIPHER_nid(const EVP_CIPHER *cipher) | |
254 | { | |
255 | return cipher->nid; | |
256 | } | |
257 | ||
258 | int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx) | |
259 | { | |
260 | return ctx->cipher->nid; | |
261 | } | |
262 | ||
6343829a | 263 | int EVP_MD_block_size(const EVP_MD *md) |
7806f3dd NL |
264 | { |
265 | return md->block_size; | |
266 | } | |
267 | ||
268 | int EVP_MD_type(const EVP_MD *md) | |
269 | { | |
270 | return md->type; | |
271 | } | |
272 | ||
273 | int EVP_MD_pkey_type(const EVP_MD *md) | |
274 | { | |
275 | return md->pkey_type; | |
276 | } | |
277 | ||
6343829a | 278 | int EVP_MD_size(const EVP_MD *md) |
7806f3dd | 279 | { |
18096abb | 280 | if (!md) |
0eab41fb BL |
281 | { |
282 | EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL); | |
18096abb | 283 | return -1; |
0eab41fb | 284 | } |
7806f3dd NL |
285 | return md->md_size; |
286 | } | |
287 | ||
e5fa864f DSH |
288 | unsigned long EVP_MD_flags(const EVP_MD *md) |
289 | { | |
290 | return md->flags; | |
291 | } | |
292 | ||
7806f3dd NL |
293 | const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx) |
294 | { | |
18096abb DSH |
295 | if (!ctx) |
296 | return NULL; | |
7806f3dd NL |
297 | return ctx->digest; |
298 | } | |
299 | ||
300 | void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags) | |
301 | { | |
302 | ctx->flags |= flags; | |
303 | } | |
304 | ||
305 | void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags) | |
306 | { | |
307 | ctx->flags &= ~flags; | |
308 | } | |
309 | ||
310 | int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags) | |
311 | { | |
312 | return (ctx->flags & flags); | |
313 | } | |
e92f9f45 DSH |
314 | |
315 | void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags) | |
316 | { | |
317 | ctx->flags |= flags; | |
318 | } | |
319 | ||
320 | void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags) | |
321 | { | |
322 | ctx->flags &= ~flags; | |
323 | } | |
324 | ||
325 | int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags) | |
326 | { | |
327 | return (ctx->flags & flags); | |
328 | } |