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/* 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);
}
/* MACRO
void 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;
}
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