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