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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); | |
70 | else | |
c39c32dd | 71 | ret=-1; |
58964a49 RE |
72 | return(ret); |
73 | } | |
74 | ||
6b691a5c | 75 | int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type) |
58964a49 RE |
76 | { |
77 | int ret; | |
78 | ||
79 | if (c->cipher->get_asn1_parameters != NULL) | |
80 | ret=c->cipher->get_asn1_parameters(c,type); | |
81 | else | |
c39c32dd | 82 | ret=-1; |
58964a49 RE |
83 | return(ret); |
84 | } | |
85 | ||
6b691a5c | 86 | int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) |
58964a49 | 87 | { |
27545970 GT |
88 | int i=0; |
89 | unsigned int l; | |
58964a49 RE |
90 | |
91 | if (type != NULL) | |
92 | { | |
93 | l=EVP_CIPHER_CTX_iv_length(c); | |
27545970 | 94 | OPENSSL_assert(l <= sizeof(c->iv)); |
58964a49 | 95 | i=ASN1_TYPE_get_octetstring(type,c->oiv,l); |
27545970 | 96 | if (i != (int)l) |
dfeab068 RE |
97 | return(-1); |
98 | else if (i > 0) | |
99 | memcpy(c->iv,c->oiv,l); | |
58964a49 RE |
100 | } |
101 | return(i); | |
102 | } | |
103 | ||
6b691a5c | 104 | int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) |
58964a49 | 105 | { |
27545970 GT |
106 | int i=0; |
107 | unsigned int j; | |
58964a49 RE |
108 | |
109 | if (type != NULL) | |
110 | { | |
111 | j=EVP_CIPHER_CTX_iv_length(c); | |
27545970 | 112 | OPENSSL_assert(j <= sizeof(c->iv)); |
58964a49 RE |
113 | i=ASN1_TYPE_set_octetstring(type,c->oiv,j); |
114 | } | |
115 | return(i); | |
116 | } | |
884e8ec6 DSH |
117 | |
118 | /* Convert the various cipher NIDs and dummies to a proper OID NID */ | |
84fa704c | 119 | int EVP_CIPHER_type(const EVP_CIPHER *ctx) |
884e8ec6 DSH |
120 | { |
121 | int nid; | |
4b426580 | 122 | ASN1_OBJECT *otmp; |
884e8ec6 DSH |
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 | ||
8d1ebe0b RL |
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 | ||
884e8ec6 | 162 | default: |
4b426580 DSH |
163 | /* Check it has an OID and it is valid */ |
164 | otmp = OBJ_nid2obj(nid); | |
165 | if(!otmp || !otmp->data) nid = NID_undef; | |
166 | ASN1_OBJECT_free(otmp); | |
884e8ec6 DSH |
167 | return nid; |
168 | } | |
169 | } | |
170 | ||
6343829a | 171 | int EVP_CIPHER_block_size(const EVP_CIPHER *e) |
7806f3dd NL |
172 | { |
173 | return e->block_size; | |
174 | } | |
175 | ||
6343829a | 176 | int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx) |
7806f3dd NL |
177 | { |
178 | return ctx->cipher->block_size; | |
179 | } | |
180 | ||
6343829a | 181 | int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl) |
7806f3dd NL |
182 | { |
183 | return ctx->cipher->do_cipher(ctx,out,in,inl); | |
184 | } | |
185 | ||
186 | const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx) | |
187 | { | |
188 | return ctx->cipher; | |
189 | } | |
190 | ||
191 | unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher) | |
192 | { | |
193 | return cipher->flags; | |
194 | } | |
195 | ||
196 | unsigned long EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx) | |
197 | { | |
198 | return ctx->cipher->flags; | |
199 | } | |
200 | ||
201 | void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx) | |
202 | { | |
203 | return ctx->app_data; | |
204 | } | |
205 | ||
206 | void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data) | |
207 | { | |
208 | ctx->app_data = data; | |
209 | } | |
210 | ||
6343829a | 211 | int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher) |
7806f3dd NL |
212 | { |
213 | return cipher->iv_len; | |
214 | } | |
215 | ||
6343829a | 216 | int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx) |
7806f3dd NL |
217 | { |
218 | return ctx->cipher->iv_len; | |
219 | } | |
220 | ||
6343829a | 221 | int EVP_CIPHER_key_length(const EVP_CIPHER *cipher) |
7806f3dd NL |
222 | { |
223 | return cipher->key_len; | |
224 | } | |
225 | ||
6343829a | 226 | int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx) |
7806f3dd | 227 | { |
6e7ca5e1 | 228 | return ctx->key_len; |
7806f3dd NL |
229 | } |
230 | ||
231 | int EVP_CIPHER_nid(const EVP_CIPHER *cipher) | |
232 | { | |
233 | return cipher->nid; | |
234 | } | |
235 | ||
236 | int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx) | |
237 | { | |
238 | return ctx->cipher->nid; | |
239 | } | |
240 | ||
6343829a | 241 | int EVP_MD_block_size(const EVP_MD *md) |
7806f3dd NL |
242 | { |
243 | return md->block_size; | |
244 | } | |
245 | ||
246 | int EVP_MD_type(const EVP_MD *md) | |
247 | { | |
248 | return md->type; | |
249 | } | |
250 | ||
251 | int EVP_MD_pkey_type(const EVP_MD *md) | |
252 | { | |
253 | return md->pkey_type; | |
254 | } | |
255 | ||
6343829a | 256 | int EVP_MD_size(const EVP_MD *md) |
7806f3dd | 257 | { |
18096abb | 258 | if (!md) |
0eab41fb BL |
259 | { |
260 | EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL); | |
18096abb | 261 | return -1; |
0eab41fb | 262 | } |
7806f3dd NL |
263 | return md->md_size; |
264 | } | |
265 | ||
266 | const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx) | |
267 | { | |
18096abb DSH |
268 | if (!ctx) |
269 | return NULL; | |
7806f3dd NL |
270 | return ctx->digest; |
271 | } | |
272 | ||
273 | void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags) | |
274 | { | |
275 | ctx->flags |= flags; | |
276 | } | |
277 | ||
278 | void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags) | |
279 | { | |
280 | ctx->flags &= ~flags; | |
281 | } | |
282 | ||
283 | int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags) | |
284 | { | |
285 | return (ctx->flags & flags); | |
286 | } |