evp_lib.c
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- /* crypto/evp/evp_lib.c */
- /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
- #include <stdio.h>
- #include "cryptlib.h"
- #include <openssl/evp.h>
- #include <openssl/objects.h>
- int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
- {
- int ret;
- if (c->cipher->set_asn1_parameters != NULL)
- ret=c->cipher->set_asn1_parameters(c,type);
- else
- ret=-1;
- return(ret);
- }
- int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
- {
- int ret;
- if (c->cipher->get_asn1_parameters != NULL)
- ret=c->cipher->get_asn1_parameters(c,type);
- else
- ret=-1;
- return(ret);
- }
- int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
- {
- int i=0;
- unsigned int l;
- if (type != NULL)
- {
- l=EVP_CIPHER_CTX_iv_length(c);
- OPENSSL_assert(l <= sizeof(c->iv));
- i=ASN1_TYPE_get_octetstring(type,c->oiv,l);
- if (i != (int)l)
- return(-1);
- else if (i > 0)
- memcpy(c->iv,c->oiv,l);
- }
- return(i);
- }
- int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
- {
- int i=0;
- unsigned int j;
- if (type != NULL)
- {
- j=EVP_CIPHER_CTX_iv_length(c);
- OPENSSL_assert(j <= sizeof(c->iv));
- i=ASN1_TYPE_set_octetstring(type,c->oiv,j);
- }
- return(i);
- }
- /* Convert the various cipher NIDs and dummies to a proper OID NID */
- int EVP_CIPHER_type(const EVP_CIPHER *ctx)
- {
- int nid;
- ASN1_OBJECT *otmp;
- nid = EVP_CIPHER_nid(ctx);
- switch(nid) {
- case NID_rc2_cbc:
- case NID_rc2_64_cbc:
- case NID_rc2_40_cbc:
- return NID_rc2_cbc;
- case NID_rc4:
- case NID_rc4_40:
- return NID_rc4;
- case NID_aes_128_cfb128:
- case NID_aes_128_cfb8:
- case NID_aes_128_cfb1:
- return NID_aes_128_cfb128;
- case NID_aes_192_cfb128:
- case NID_aes_192_cfb8:
- case NID_aes_192_cfb1:
- return NID_aes_192_cfb128;
- case NID_aes_256_cfb128:
- case NID_aes_256_cfb8:
- case NID_aes_256_cfb1:
- return NID_aes_256_cfb128;
- case NID_des_cfb64:
- case NID_des_cfb8:
- case NID_des_cfb1:
- return NID_des_cfb64;
- default:
- /* Check it has an OID and it is valid */
- otmp = OBJ_nid2obj(nid);
- if(!otmp || !otmp->data) nid = NID_undef;
- ASN1_OBJECT_free(otmp);
- return nid;
- }
- }