1 /* crypto/evp/evp_lib.c */
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.]
60 #include "internal/cryptlib.h"
61 #include <openssl/evp.h>
62 #include <openssl/objects.h>
63 #include "internal/evp_int.h"
66 int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
70 if (c->cipher->set_asn1_parameters != NULL)
71 ret = c->cipher->set_asn1_parameters(c, type);
72 else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
73 switch (EVP_CIPHER_CTX_mode(c)) {
74 case EVP_CIPH_WRAP_MODE:
75 if (EVP_CIPHER_CTX_nid(c) == NID_id_smime_alg_CMS3DESwrap)
76 ASN1_TYPE_set(type, V_ASN1_NULL, NULL);
80 case EVP_CIPH_GCM_MODE:
81 case EVP_CIPH_CCM_MODE:
82 case EVP_CIPH_XTS_MODE:
83 case EVP_CIPH_OCB_MODE:
88 ret = EVP_CIPHER_set_asn1_iv(c, type);
95 int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
99 if (c->cipher->get_asn1_parameters != NULL)
100 ret = c->cipher->get_asn1_parameters(c, type);
101 else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
102 switch (EVP_CIPHER_CTX_mode(c)) {
104 case EVP_CIPH_WRAP_MODE:
108 case EVP_CIPH_GCM_MODE:
109 case EVP_CIPH_CCM_MODE:
110 case EVP_CIPH_XTS_MODE:
111 case EVP_CIPH_OCB_MODE:
116 ret = EVP_CIPHER_get_asn1_iv(c, type);
124 int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
130 l = EVP_CIPHER_CTX_iv_length(c);
131 OPENSSL_assert(l <= sizeof(c->iv));
132 i = ASN1_TYPE_get_octetstring(type, c->oiv, l);
136 memcpy(c->iv, c->oiv, l);
141 int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
147 j = EVP_CIPHER_CTX_iv_length(c);
148 OPENSSL_assert(j <= sizeof(c->iv));
149 i = ASN1_TYPE_set_octetstring(type, c->oiv, j);
154 /* Convert the various cipher NIDs and dummies to a proper OID NID */
155 int EVP_CIPHER_type(const EVP_CIPHER *ctx)
159 nid = EVP_CIPHER_nid(ctx);
174 case NID_aes_128_cfb128:
175 case NID_aes_128_cfb8:
176 case NID_aes_128_cfb1:
178 return NID_aes_128_cfb128;
180 case NID_aes_192_cfb128:
181 case NID_aes_192_cfb8:
182 case NID_aes_192_cfb1:
184 return NID_aes_192_cfb128;
186 case NID_aes_256_cfb128:
187 case NID_aes_256_cfb8:
188 case NID_aes_256_cfb1:
190 return NID_aes_256_cfb128;
196 return NID_des_cfb64;
198 case NID_des_ede3_cfb64:
199 case NID_des_ede3_cfb8:
200 case NID_des_ede3_cfb1:
202 return NID_des_cfb64;
205 /* Check it has an OID and it is valid */
206 otmp = OBJ_nid2obj(nid);
207 if (OBJ_get0_data(otmp) == NULL)
209 ASN1_OBJECT_free(otmp);
214 int EVP_CIPHER_block_size(const EVP_CIPHER *e)
216 return e->block_size;
219 int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
221 return ctx->cipher->block_size;
224 int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
225 const unsigned char *in, unsigned int inl)
227 return ctx->cipher->do_cipher(ctx, out, in, inl);
230 const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
235 int EVP_CIPHER_CTX_encrypting(const EVP_CIPHER_CTX *ctx)
240 unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher)
242 return cipher->flags;
245 unsigned long EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx)
247 return ctx->cipher->flags;
250 void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
252 return ctx->app_data;
255 void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
257 ctx->app_data = data;
260 void *EVP_CIPHER_CTX_cipher_data(const EVP_CIPHER_CTX *ctx)
262 return ctx->cipher_data;
265 /* FIXME: temporary until EVP_CIPHER goes opaque */
266 void EVP_CIPHER_CTX_new_cipher_data(EVP_CIPHER_CTX *ctx, size_t size)
268 if (ctx->cipher_data == NULL && ctx->cipher->ctx_size == 0)
269 ctx->cipher_data = OPENSSL_zalloc(size);
272 int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
274 return cipher->iv_len;
277 int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)
279 return ctx->cipher->iv_len;
282 const unsigned char *EVP_CIPHER_CTX_original_iv(const EVP_CIPHER_CTX *ctx)
287 const unsigned char *EVP_CIPHER_CTX_iv(const EVP_CIPHER_CTX *ctx)
292 unsigned char *EVP_CIPHER_CTX_iv_noconst(EVP_CIPHER_CTX *ctx)
297 unsigned char *EVP_CIPHER_CTX_buf_noconst(EVP_CIPHER_CTX *ctx)
302 int EVP_CIPHER_CTX_num(const EVP_CIPHER_CTX *ctx)
307 void EVP_CIPHER_CTX_set_num(EVP_CIPHER_CTX *ctx, int num)
312 int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
314 return cipher->key_len;
317 int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
322 int EVP_CIPHER_nid(const EVP_CIPHER *cipher)
327 int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
329 return ctx->cipher->nid;
332 int EVP_MD_block_size(const EVP_MD *md)
334 return md->block_size;
337 int EVP_MD_type(const EVP_MD *md)
342 int EVP_MD_pkey_type(const EVP_MD *md)
344 return md->pkey_type;
347 int EVP_MD_size(const EVP_MD *md)
350 EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL);
356 unsigned long EVP_MD_flags(const EVP_MD *md)
361 EVP_MD *EVP_MD_meth_new(int md_type, int pkey_type)
363 EVP_MD *md = (EVP_MD *)OPENSSL_zalloc(sizeof(EVP_MD));
366 md->pkey_type = pkey_type;
370 EVP_MD *EVP_MD_meth_dup(const EVP_MD *md)
372 EVP_MD *to = EVP_MD_meth_new(md->type, md->pkey_type);
374 memcpy(to, md, sizeof(*to));
377 void EVP_MD_meth_free(EVP_MD *md)
381 int EVP_MD_meth_set_input_blocksize(EVP_MD *md, int blocksize)
383 md->block_size = blocksize;
386 int EVP_MD_meth_set_result_size(EVP_MD *md, int resultsize)
388 md->md_size = resultsize;
391 int EVP_MD_meth_set_app_datasize(EVP_MD *md, int datasize)
393 md->ctx_size = datasize;
396 int EVP_MD_meth_set_flags(EVP_MD *md, unsigned long flags)
401 int EVP_MD_meth_set_init(EVP_MD *md, int (*init)(EVP_MD_CTX *ctx))
406 int EVP_MD_meth_set_update(EVP_MD *md, int (*update)(EVP_MD_CTX *ctx,
413 int EVP_MD_meth_set_final(EVP_MD *md, int (*final)(EVP_MD_CTX *ctx,
419 int EVP_MD_meth_set_copy(EVP_MD *md, int (*copy)(EVP_MD_CTX *to,
420 const EVP_MD_CTX *from))
425 int EVP_MD_meth_set_cleanup(EVP_MD *md, int (*cleanup)(EVP_MD_CTX *ctx))
427 md->cleanup = cleanup;
430 int EVP_MD_meth_set_ctrl(EVP_MD *md, int (*ctrl)(EVP_MD_CTX *ctx, int cmd,
437 int EVP_MD_meth_get_input_blocksize(const EVP_MD *md)
439 return md->block_size;
441 int EVP_MD_meth_get_result_size(const EVP_MD *md)
445 int EVP_MD_meth_get_app_datasize(const EVP_MD *md)
449 unsigned long EVP_MD_meth_get_flags(const EVP_MD *md)
451 return md->block_size;
453 int (*EVP_MD_meth_get_init(const EVP_MD *md))(EVP_MD_CTX *ctx)
457 int (*EVP_MD_meth_get_update(const EVP_MD *md))(EVP_MD_CTX *ctx,
463 int (*EVP_MD_meth_get_final(const EVP_MD *md))(EVP_MD_CTX *ctx,
468 int (*EVP_MD_meth_get_copy(const EVP_MD *md))(EVP_MD_CTX *to,
469 const EVP_MD_CTX *from)
473 int (*EVP_MD_meth_get_cleanup(const EVP_MD *md))(EVP_MD_CTX *ctx)
477 int (*EVP_MD_meth_get_ctrl(const EVP_MD *md))(EVP_MD_CTX *ctx, int cmd,
483 const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
490 EVP_PKEY_CTX *EVP_MD_CTX_pkey_ctx(const EVP_MD_CTX *ctx)
495 void *EVP_MD_CTX_md_data(const EVP_MD_CTX *ctx)
500 int (*EVP_MD_CTX_update_fn(EVP_MD_CTX *ctx))(EVP_MD_CTX *ctx,
501 const void *data, size_t count)
506 void EVP_MD_CTX_set_update_fn(EVP_MD_CTX *ctx,
507 int (*update) (EVP_MD_CTX *ctx,
508 const void *data, size_t count))
510 ctx->update = update;
513 void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
518 void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
520 ctx->flags &= ~flags;
523 int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
525 return (ctx->flags & flags);
528 void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
533 void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
535 ctx->flags &= ~flags;
538 int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
540 return (ctx->flags & flags);