/* crypto/evp/p_seal.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/rand.h>#ifndef OPENSSL_NO_RSA#include <openssl/rsa.h>#endif#include <openssl/evp.h>#include <openssl/objects.h>#include <openssl/x509.h>int EVP_SealInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type, unsigned char **ek,	     int *ekl, unsigned char *iv, EVP_PKEY **pubk, int npubk)	{	unsigned char key[EVP_MAX_KEY_LENGTH];	int i;		if(type) {		EVP_CIPHER_CTX_init(ctx);		if(!EVP_EncryptInit_ex(ctx,type,NULL,NULL,NULL)) return 0;	}	if ((npubk <= 0) || !pubk)		return 1;	if (RAND_bytes(key,EVP_MAX_KEY_LENGTH) <= 0)		return 0;	if (EVP_CIPHER_CTX_iv_length(ctx))		RAND_pseudo_bytes(iv,EVP_CIPHER_CTX_iv_length(ctx));	if(!EVP_EncryptInit_ex(ctx,NULL,NULL,key,iv)) return 0;	for (i=0; i<npubk; i++)		{		ekl[i]=EVP_PKEY_encrypt(ek[i],key,EVP_CIPHER_CTX_key_length(ctx),			pubk[i]);		if (ekl[i] <= 0) return(-1);		}	return(npubk);	}/* MACROvoid EVP_SealUpdate(ctx,out,outl,in,inl)EVP_CIPHER_CTX *ctx;unsigned char *out;int *outl;unsigned char *in;int inl;	{	EVP_EncryptUpdate(ctx,out,outl,in,inl);	}*/int EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)	{	int i;	i = EVP_EncryptFinal_ex(ctx,out,outl);	EVP_EncryptInit_ex(ctx,NULL,NULL,NULL,NULL);	return i;	}