/* 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>

EXPORT_C 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);

	}

EXPORT_C 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);

	}

EXPORT_C 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);

	}

EXPORT_C 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 */

EXPORT_C 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;

	}

}

EXPORT_C int EVP_CIPHER_block_size(const EVP_CIPHER *e)

	{

	return e->block_size;

	}

EXPORT_C int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)

	{

	return ctx->cipher->block_size;

	}

EXPORT_C int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl)

	{

	return ctx->cipher->do_cipher(ctx,out,in,inl);

	}

EXPORT_C const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)

	{

	return ctx->cipher;

	}

EXPORT_C unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher)

	{

	return cipher->flags;

	}

EXPORT_C unsigned long EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx)

	{

	return ctx->cipher->flags;

	}

EXPORT_C void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)

	{

	return ctx->app_data;

	}

EXPORT_C void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)

	{

	ctx->app_data = data;

	}

EXPORT_C int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)

	{

	return cipher->iv_len;

	}

EXPORT_C int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)

	{

	return ctx->cipher->iv_len;

	}

EXPORT_C int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)

	{

	return cipher->key_len;

	}

EXPORT_C int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)

	{

	return ctx->key_len;

	}

EXPORT_C int EVP_CIPHER_nid(const EVP_CIPHER *cipher)

	{

	return cipher->nid;

	}

EXPORT_C int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)

	{

	return ctx->cipher->nid;

	}

EXPORT_C int EVP_MD_block_size(const EVP_MD *md) 

	{

	return md->block_size;

	}

EXPORT_C int EVP_MD_type(const EVP_MD *md)

	{

	return md->type;

	}

EXPORT_C int EVP_MD_pkey_type(const EVP_MD *md)

	{

	return md->pkey_type;

	}

EXPORT_C int EVP_MD_size(const EVP_MD *md)

	{

	return md->md_size;

	}

EXPORT_C const EVP_MD * EVP_MD_CTX_md(const EVP_MD_CTX *ctx)

	{

	return ctx->digest;

	}

EXPORT_C void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)

	{

	ctx->flags |= flags;

	}

EXPORT_C void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)

	{

	ctx->flags &= ~flags;

	}

EXPORT_C int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)

	{

	return (ctx->flags & flags);

	}