1 /* $OpenBSD: evp_lib.c,v 1.17 2018/09/12 06:35:38 djm Exp $ */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
62 #include <openssl/err.h>
63 #include <openssl/evp.h>
64 #include <openssl/objects.h>
67 EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
71 if (c->cipher->set_asn1_parameters != NULL)
72 ret = c->cipher->set_asn1_parameters(c, type);
73 else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1)
74 ret = EVP_CIPHER_set_asn1_iv(c, type);
81 EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
85 if (c->cipher->get_asn1_parameters != NULL)
86 ret = c->cipher->get_asn1_parameters(c, type);
87 else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1)
88 ret = EVP_CIPHER_get_asn1_iv(c, type);
95 EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
101 l = EVP_CIPHER_CTX_iv_length(c);
102 if (l > sizeof(c->iv)) {
103 EVPerror(EVP_R_IV_TOO_LARGE);
106 i = ASN1_TYPE_get_octetstring(type, c->oiv, l);
110 memcpy(c->iv, c->oiv, l);
116 EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
122 j = EVP_CIPHER_CTX_iv_length(c);
123 if (j > sizeof(c->iv)) {
124 EVPerror(EVP_R_IV_TOO_LARGE);
127 i = ASN1_TYPE_set_octetstring(type, c->oiv, j);
132 /* Convert the various cipher NIDs and dummies to a proper OID NID */
134 EVP_CIPHER_type(const EVP_CIPHER *ctx)
138 nid = EVP_CIPHER_nid(ctx);
150 case NID_aes_128_cfb128:
151 case NID_aes_128_cfb8:
152 case NID_aes_128_cfb1:
153 return NID_aes_128_cfb128;
155 case NID_aes_192_cfb128:
156 case NID_aes_192_cfb8:
157 case NID_aes_192_cfb1:
158 return NID_aes_192_cfb128;
160 case NID_aes_256_cfb128:
161 case NID_aes_256_cfb8:
162 case NID_aes_256_cfb1:
163 return NID_aes_256_cfb128;
168 return NID_des_cfb64;
170 case NID_des_ede3_cfb64:
171 case NID_des_ede3_cfb8:
172 case NID_des_ede3_cfb1:
173 return NID_des_cfb64;
176 /* Check it has an OID and it is valid */
177 otmp = OBJ_nid2obj(nid);
178 if (!otmp || !otmp->data)
180 ASN1_OBJECT_free(otmp);
186 EVP_CIPHER_block_size(const EVP_CIPHER *e)
188 return e->block_size;
192 EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
194 return ctx->cipher->block_size;
198 EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in,
201 return ctx->cipher->do_cipher(ctx, out, in, inl);
205 EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
211 EVP_CIPHER_CTX_encrypting(const EVP_CIPHER_CTX *ctx)
217 EVP_CIPHER_flags(const EVP_CIPHER *cipher)
219 return cipher->flags;
223 EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx)
225 return ctx->cipher->flags;
229 EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
231 return ctx->app_data;
235 EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
237 ctx->app_data = data;
241 EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
243 return cipher->iv_len;
247 EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)
249 return ctx->cipher->iv_len;
253 EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
255 return cipher->key_len;
259 EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
265 EVP_CIPHER_nid(const EVP_CIPHER *cipher)
271 EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
273 return ctx->cipher->nid;
277 EVP_CIPHER_CTX_get_iv(const EVP_CIPHER_CTX *ctx, unsigned char *iv, size_t len)
279 if (ctx == NULL || len != EVP_CIPHER_CTX_iv_length(ctx))
281 if (len > EVP_MAX_IV_LENGTH)
282 return 0; /* sanity check; shouldn't happen */
284 * Skip the memcpy entirely when the requested IV length is zero,
285 * since the iv pointer may be NULL or invalid.
290 memcpy(iv, ctx->iv, len);
296 EVP_CIPHER_CTX_set_iv(EVP_CIPHER_CTX *ctx, const unsigned char *iv, size_t len)
298 if (ctx == NULL || len != EVP_CIPHER_CTX_iv_length(ctx))
300 if (len > EVP_MAX_IV_LENGTH)
301 return 0; /* sanity check; shouldn't happen */
303 * Skip the memcpy entirely when the requested IV length is zero,
304 * since the iv pointer may be NULL or invalid.
309 memcpy(ctx->iv, iv, len);
315 EVP_MD_block_size(const EVP_MD *md)
317 return md->block_size;
321 EVP_MD_type(const EVP_MD *md)
327 EVP_MD_pkey_type(const EVP_MD *md)
329 return md->pkey_type;
333 EVP_MD_size(const EVP_MD *md)
336 EVPerror(EVP_R_MESSAGE_DIGEST_IS_NULL);
343 EVP_MD_flags(const EVP_MD *md)
349 EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
357 EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
363 EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
365 ctx->flags &= ~flags;
369 EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
371 return (ctx->flags & flags);
375 EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
381 EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
383 ctx->flags &= ~flags;
387 EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
389 return (ctx->flags & flags);