/* crypto/evp/p_open.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"#ifndef OPENSSL_NO_RSA#include <openssl/evp.h>#include <openssl/objects.h>#include <openssl/x509.h>#include <openssl/rsa.h>int EVP_OpenInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,	const unsigned char *ek, int ekl, const unsigned char *iv,	EVP_PKEY *priv)	{	unsigned char *key=NULL;	int i,size=0,ret=0;	if(type) {			EVP_CIPHER_CTX_init(ctx);		if(!EVP_DecryptInit_ex(ctx,type,NULL, NULL,NULL)) return 0;	}	if(!priv) return 1;	if (priv->type != EVP_PKEY_RSA)		{		EVPerr(EVP_F_EVP_OPENINIT,EVP_R_PUBLIC_KEY_NOT_RSA);		goto err;                }	size=RSA_size(priv->pkey.rsa);	key=(unsigned char *)OPENSSL_malloc(size+2);	if (key == NULL)		{		/* ERROR */		EVPerr(EVP_F_EVP_OPENINIT,ERR_R_MALLOC_FAILURE);		goto err;		}	i=EVP_PKEY_decrypt(key,ek,ekl,priv);	if ((i <= 0) || !EVP_CIPHER_CTX_set_key_length(ctx, i))		{		/* ERROR */		goto err;		}	if(!EVP_DecryptInit_ex(ctx,NULL,NULL,key,iv)) goto err;	ret=1;err:	if (key != NULL) OPENSSL_cleanse(key,size);	OPENSSL_free(key);	return(ret);	}int EVP_OpenFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)	{	int i;	i=EVP_DecryptFinal_ex(ctx,out,outl);	EVP_DecryptInit_ex(ctx,NULL,NULL,NULL,NULL);	return(i);	}#else /* !OPENSSL_NO_RSA */# ifdef PEDANTICstatic void *dummy=&dummy;# endif#endif