sl@0: /* p12_decr.c */
sl@0: /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
sl@0:  * project 1999.
sl@0:  */
sl@0: /* ====================================================================
sl@0:  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
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:  *
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer. 
sl@0:  *
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in
sl@0:  *    the documentation and/or other materials provided with the
sl@0:  *    distribution.
sl@0:  *
sl@0:  * 3. All advertising materials mentioning features or use of this
sl@0:  *    software must display the following acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
sl@0:  *
sl@0:  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
sl@0:  *    endorse or promote products derived from this software without
sl@0:  *    prior written permission. For written permission, please contact
sl@0:  *    licensing@OpenSSL.org.
sl@0:  *
sl@0:  * 5. Products derived from this software may not be called "OpenSSL"
sl@0:  *    nor may "OpenSSL" appear in their names without prior written
sl@0:  *    permission of the OpenSSL Project.
sl@0:  *
sl@0:  * 6. Redistributions of any form whatsoever must retain the following
sl@0:  *    acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
sl@0:  *
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
sl@0:  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
sl@0:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
sl@0:  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
sl@0:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
sl@0:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
sl@0:  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
sl@0:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
sl@0:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
sl@0:  * OF THE POSSIBILITY OF SUCH DAMAGE.
sl@0:  * ====================================================================
sl@0:  *
sl@0:  * This product includes cryptographic software written by Eric Young
sl@0:  * (eay@cryptsoft.com).  This product includes software written by Tim
sl@0:  * Hudson (tjh@cryptsoft.com).
sl@0:  *
sl@0:  */
sl@0: 
sl@0: #include <stdio.h>
sl@0: #include "cryptlib.h"
sl@0: #include <openssl/pkcs12.h>
sl@0: 
sl@0: /* Define this to dump decrypted output to files called DERnnn */
sl@0: /*#define DEBUG_DECRYPT*/
sl@0: 
sl@0: 
sl@0: /* Encrypt/Decrypt a buffer based on password and algor, result in a
sl@0:  * OPENSSL_malloc'ed buffer
sl@0:  */
sl@0: 
sl@0: EXPORT_C unsigned char * PKCS12_pbe_crypt(X509_ALGOR *algor, const char *pass,
sl@0: 	     int passlen, unsigned char *in, int inlen, unsigned char **data,
sl@0: 	     int *datalen, int en_de)
sl@0: {
sl@0: 	unsigned char *out;
sl@0: 	int outlen, i;
sl@0: 	EVP_CIPHER_CTX ctx;
sl@0: 
sl@0: 	EVP_CIPHER_CTX_init(&ctx);
sl@0: 	/* Decrypt data */
sl@0:         if (!EVP_PBE_CipherInit(algor->algorithm, pass, passlen,
sl@0: 					 algor->parameter, &ctx, en_de)) {
sl@0: 		PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,PKCS12_R_PKCS12_ALGOR_CIPHERINIT_ERROR);
sl@0: 		return NULL;
sl@0: 	}
sl@0: 
sl@0: 	if(!(out = OPENSSL_malloc(inlen + EVP_CIPHER_CTX_block_size(&ctx)))) {
sl@0: 		PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,ERR_R_MALLOC_FAILURE);
sl@0: 		goto err;
sl@0: 	}
sl@0: 
sl@0: 	EVP_CipherUpdate(&ctx, out, &i, in, inlen);
sl@0: 	outlen = i;
sl@0: 	if(!EVP_CipherFinal_ex(&ctx, out + i, &i)) {
sl@0: 		OPENSSL_free(out);
sl@0: 		out = NULL;
sl@0: 		PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,PKCS12_R_PKCS12_CIPHERFINAL_ERROR);
sl@0: 		goto err;
sl@0: 	}
sl@0: 	outlen += i;
sl@0: 	if (datalen) *datalen = outlen;
sl@0: 	if (data) *data = out;
sl@0: 	err:
sl@0: 	EVP_CIPHER_CTX_cleanup(&ctx);
sl@0: 	return out;
sl@0: 
sl@0: }
sl@0: 
sl@0: /* Decrypt an OCTET STRING and decode ASN1 structure 
sl@0:  * if zbuf set zero buffer after use.
sl@0:  */
sl@0: 
sl@0: EXPORT_C void * PKCS12_item_decrypt_d2i(X509_ALGOR *algor, const ASN1_ITEM *it,
sl@0: 	     const char *pass, int passlen, ASN1_OCTET_STRING *oct, int zbuf)
sl@0: {
sl@0: 	unsigned char *out;
sl@0: 	const unsigned char *p;
sl@0: 	void *ret;
sl@0: 	int outlen;
sl@0: 
sl@0: 	if (!PKCS12_pbe_crypt(algor, pass, passlen, oct->data, oct->length,
sl@0: 			       &out, &outlen, 0)) {
sl@0: 		PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I,PKCS12_R_PKCS12_PBE_CRYPT_ERROR);
sl@0: 		return NULL;
sl@0: 	}
sl@0: 	p = out;
sl@0: #ifdef DEBUG_DECRYPT
sl@0: 	{
sl@0: 		FILE *op;
sl@0: 
sl@0: 		char fname[30];
sl@0: 		static int fnm = 1;
sl@0: 		sprintf(fname, "DER%d", fnm++);
sl@0: 		op = fopen(fname, "wb");
sl@0: 		fwrite (p, 1, outlen, op);
sl@0: 		fclose(op);
sl@0: 	}
sl@0: #endif
sl@0: 	ret = ASN1_item_d2i(NULL, &p, outlen, it);
sl@0: 	if (zbuf) OPENSSL_cleanse(out, outlen);
sl@0: 	if(!ret) PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I,PKCS12_R_DECODE_ERROR);
sl@0: 	OPENSSL_free(out);
sl@0: 	return ret;
sl@0: }
sl@0: 
sl@0: /* Encode ASN1 structure and encrypt, return OCTET STRING 
sl@0:  * if zbuf set zero encoding.
sl@0:  */
sl@0: 
sl@0: EXPORT_C ASN1_OCTET_STRING *PKCS12_item_i2d_encrypt(X509_ALGOR *algor, const ASN1_ITEM *it,
sl@0: 				       const char *pass, int passlen,
sl@0: 				       void *obj, int zbuf)
sl@0: {
sl@0: 	ASN1_OCTET_STRING *oct;
sl@0: 	unsigned char *in = NULL;
sl@0: 	int inlen;
sl@0: 	if (!(oct = M_ASN1_OCTET_STRING_new ())) {
sl@0: 		PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,ERR_R_MALLOC_FAILURE);
sl@0: 		return NULL;
sl@0: 	}
sl@0: 	inlen = ASN1_item_i2d(obj, &in, it);
sl@0: 	if (!in) {
sl@0: 		PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,PKCS12_R_ENCODE_ERROR);
sl@0: 		return NULL;
sl@0: 	}
sl@0: 	if (!PKCS12_pbe_crypt(algor, pass, passlen, in, inlen, &oct->data,
sl@0: 				 &oct->length, 1)) {
sl@0: 		PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,PKCS12_R_ENCRYPT_ERROR);
sl@0: 		OPENSSL_free(in);
sl@0: 		return NULL;
sl@0: 	}
sl@0: 	if (zbuf) OPENSSL_cleanse(in, inlen);
sl@0: 	OPENSSL_free(in);
sl@0: 	return oct;
sl@0: }
sl@0: 
sl@0: IMPLEMENT_PKCS12_STACK_OF(PKCS7)