evp_lib.c revision 142425
155714Skris/* crypto/evp/evp_lib.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 855714Skris * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 1555714Skris * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 2255714Skris * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 3755714Skris * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 4055714Skris * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 5255714Skris * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5855714Skris 5955714Skris#include <stdio.h> 6055714Skris#include "cryptlib.h" 6155714Skris#include <openssl/evp.h> 6255714Skris#include <openssl/objects.h> 6355714Skris 6455714Skrisint EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 6555714Skris { 6655714Skris int ret; 6755714Skris 6855714Skris if (c->cipher->set_asn1_parameters != NULL) 6955714Skris ret=c->cipher->set_asn1_parameters(c,type); 7055714Skris else 71142425Snectar return -1; 7255714Skris return(ret); 7355714Skris } 7455714Skris 7555714Skrisint EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 7655714Skris { 7755714Skris int ret; 7855714Skris 7955714Skris if (c->cipher->get_asn1_parameters != NULL) 8055714Skris ret=c->cipher->get_asn1_parameters(c,type); 8155714Skris else 82142425Snectar return -1; 8355714Skris return(ret); 8455714Skris } 8555714Skris 8655714Skrisint EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 8755714Skris { 8855714Skris int i=0,l; 8955714Skris 9055714Skris if (type != NULL) 9155714Skris { 9255714Skris l=EVP_CIPHER_CTX_iv_length(c); 93109998Smarkm OPENSSL_assert(l <= sizeof c->iv); 9455714Skris i=ASN1_TYPE_get_octetstring(type,c->oiv,l); 9555714Skris if (i != l) 9655714Skris return(-1); 9755714Skris else if (i > 0) 9855714Skris memcpy(c->iv,c->oiv,l); 9955714Skris } 10055714Skris return(i); 10155714Skris } 10255714Skris 10355714Skrisint EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 10455714Skris { 10555714Skris int i=0,j; 10655714Skris 10755714Skris if (type != NULL) 10855714Skris { 10955714Skris j=EVP_CIPHER_CTX_iv_length(c); 110109998Smarkm OPENSSL_assert(j <= sizeof c->iv); 11155714Skris i=ASN1_TYPE_set_octetstring(type,c->oiv,j); 11255714Skris } 11355714Skris return(i); 11455714Skris } 11555714Skris 11655714Skris/* Convert the various cipher NIDs and dummies to a proper OID NID */ 11755714Skrisint EVP_CIPHER_type(const EVP_CIPHER *ctx) 11855714Skris{ 11955714Skris int nid; 12059191Skris ASN1_OBJECT *otmp; 12155714Skris nid = EVP_CIPHER_nid(ctx); 12255714Skris 12355714Skris switch(nid) { 12455714Skris 12555714Skris case NID_rc2_cbc: 12655714Skris case NID_rc2_64_cbc: 12755714Skris case NID_rc2_40_cbc: 12855714Skris 12955714Skris return NID_rc2_cbc; 13055714Skris 13155714Skris case NID_rc4: 13255714Skris case NID_rc4_40: 13355714Skris 13455714Skris return NID_rc4; 13555714Skris 136142425Snectar case NID_aes_128_cfb128: 137142425Snectar case NID_aes_128_cfb8: 138142425Snectar case NID_aes_128_cfb1: 139142425Snectar 140142425Snectar return NID_aes_128_cfb128; 141142425Snectar 142142425Snectar case NID_aes_192_cfb128: 143142425Snectar case NID_aes_192_cfb8: 144142425Snectar case NID_aes_192_cfb1: 145142425Snectar 146142425Snectar return NID_aes_192_cfb128; 147142425Snectar 148142425Snectar case NID_aes_256_cfb128: 149142425Snectar case NID_aes_256_cfb8: 150142425Snectar case NID_aes_256_cfb1: 151142425Snectar 152142425Snectar return NID_aes_256_cfb128; 153142425Snectar 154142425Snectar case NID_des_cfb64: 155142425Snectar case NID_des_cfb8: 156142425Snectar case NID_des_cfb1: 157142425Snectar 158142425Snectar return NID_des_cfb64; 159142425Snectar 16055714Skris default: 16159191Skris /* Check it has an OID and it is valid */ 16259191Skris otmp = OBJ_nid2obj(nid); 16359191Skris if(!otmp || !otmp->data) nid = NID_undef; 16459191Skris ASN1_OBJECT_free(otmp); 16555714Skris return nid; 16655714Skris } 16755714Skris} 16855714Skris 169