187 lines
6 KiB
C
187 lines
6 KiB
C
/* p12_decr.c */
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/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
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* project 1999.
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*/
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/* ====================================================================
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* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include "cryptlib.h"
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#include <openssl/pkcs12.h>
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/* Define this to dump decrypted output to files called DERnnn */
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/*#define DEBUG_DECRYPT*/
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/* Encrypt/Decrypt a buffer based on password and algor, result in a
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* Malloc'ed buffer
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*/
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unsigned char * PKCS12_pbe_crypt (X509_ALGOR *algor, const char *pass,
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int passlen, unsigned char *in, int inlen, unsigned char **data,
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int *datalen, int en_de)
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{
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unsigned char *out;
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int outlen, i;
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EVP_CIPHER_CTX ctx;
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/* Decrypt data */
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if (!EVP_PBE_CipherInit (algor->algorithm, pass, passlen,
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algor->parameter, &ctx, en_de)) {
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PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,PKCS12_R_PKCS12_ALGOR_CIPHERINIT_ERROR);
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return NULL;
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}
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if(!(out = Malloc (inlen + EVP_CIPHER_CTX_block_size(&ctx)))) {
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PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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EVP_CipherUpdate (&ctx, out, &i, in, inlen);
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outlen = i;
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if(!EVP_CipherFinal (&ctx, out + i, &i)) {
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Free (out);
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PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,PKCS12_R_PKCS12_CIPHERFINAL_ERROR);
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return NULL;
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}
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outlen += i;
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if (datalen) *datalen = outlen;
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if (data) *data = out;
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return out;
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}
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/* Decrypt an OCTET STRING and decode ASN1 structure
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* if seq & 1 'obj' is a stack of structures to be encoded
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* if seq & 2 zero buffer after use
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* as a sequence.
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*/
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char * PKCS12_decrypt_d2i (X509_ALGOR *algor, char * (*d2i)(),
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void (*free_func)(), const char *pass, int passlen,
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ASN1_OCTET_STRING *oct, int seq)
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{
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unsigned char *out, *p;
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char *ret;
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int outlen;
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if (!PKCS12_pbe_crypt (algor, pass, passlen, oct->data, oct->length,
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&out, &outlen, 0)) {
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PKCS12err(PKCS12_F_PKCS12_DECRYPT_D2I,PKCS12_R_PKCS12_PBE_CRYPT_ERROR);
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return NULL;
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}
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p = out;
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#ifdef DEBUG_DECRYPT
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{
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FILE *op;
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char fname[30];
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static int fnm = 1;
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sprintf(fname, "DER%d", fnm++);
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op = fopen(fname, "wb");
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fwrite (p, 1, outlen, op);
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fclose(op);
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}
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#endif
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if (seq & 1) ret = (char *) d2i_ASN1_SET(NULL, &p, outlen, d2i,
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free_func, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL);
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else ret = d2i(NULL, &p, outlen);
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if (seq & 2) memset(out, 0, outlen);
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if(!ret) PKCS12err(PKCS12_F_PKCS12_DECRYPT_D2I,PKCS12_R_DECODE_ERROR);
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Free (out);
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return ret;
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}
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/* Encode ASN1 structure and encrypt, return OCTET STRING
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* if 'seq' is non-zero 'obj' is a stack of structures to be encoded
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* as a sequence
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*/
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ASN1_OCTET_STRING *PKCS12_i2d_encrypt (X509_ALGOR *algor, int (*i2d)(),
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const char *pass, int passlen,
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char *obj, int seq)
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{
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ASN1_OCTET_STRING *oct;
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unsigned char *in, *p;
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int inlen;
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if (!(oct = M_ASN1_OCTET_STRING_new ())) {
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PKCS12err(PKCS12_F_PKCS12_I2D_ENCRYPT,ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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if (seq) inlen = i2d_ASN1_SET((STACK *)obj, NULL, i2d, V_ASN1_SEQUENCE,
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V_ASN1_UNIVERSAL, IS_SEQUENCE);
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else inlen = i2d (obj, NULL);
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if (!inlen) {
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PKCS12err(PKCS12_F_PKCS12_I2D_ENCRYPT,PKCS12_R_ENCODE_ERROR);
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return NULL;
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}
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if (!(in = Malloc (inlen))) {
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PKCS12err(PKCS12_F_PKCS12_I2D_ENCRYPT,ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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p = in;
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if (seq) i2d_ASN1_SET((STACK *)obj, &p, i2d, V_ASN1_SEQUENCE,
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V_ASN1_UNIVERSAL, IS_SEQUENCE);
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else i2d (obj, &p);
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if (!PKCS12_pbe_crypt (algor, pass, passlen, in, inlen, &oct->data,
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&oct->length, 1)) {
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PKCS12err(PKCS12_F_PKCS12_I2D_ENCRYPT,PKCS12_R_ENCRYPT_ERROR);
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Free(in);
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return NULL;
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}
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Free (in);
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return oct;
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}
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IMPLEMENT_PKCS12_STACK_OF(PKCS7)
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