1/* p12_decr.c */
2/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
3 * project 1999.
4 */
5/* ====================================================================
6 * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in
17 *    the documentation and/or other materials provided with the
18 *    distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 *    software must display the following acknowledgment:
22 *    "This product includes software developed by the OpenSSL Project
23 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 *    endorse or promote products derived from this software without
27 *    prior written permission. For written permission, please contact
28 *    licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 *    nor may "OpenSSL" appear in their names without prior written
32 *    permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 *    acknowledgment:
36 *    "This product includes software developed by the OpenSSL Project
37 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com).  This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59#include <stdio.h>
60#include "cryptlib.h"
61#include <openssl/pkcs12.h>
62
63/* Define this to dump decrypted output to files called DERnnn */
64/*#define DEBUG_DECRYPT*/
65
66
67/* Encrypt/Decrypt a buffer based on password and algor, result in a
68 * OPENSSL_malloc'ed buffer
69 */
70
71unsigned char * PKCS12_pbe_crypt(X509_ALGOR *algor, const char *pass,
72	     int passlen, unsigned char *in, int inlen, unsigned char **data,
73	     int *datalen, int en_de)
74{
75	unsigned char *out;
76	int outlen, i;
77	EVP_CIPHER_CTX ctx;
78
79	EVP_CIPHER_CTX_init(&ctx);
80	/* Decrypt data */
81        if (!EVP_PBE_CipherInit(algor->algorithm, pass, passlen,
82					 algor->parameter, &ctx, en_de)) {
83		PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,PKCS12_R_PKCS12_ALGOR_CIPHERINIT_ERROR);
84		return NULL;
85	}
86
87	if(!(out = OPENSSL_malloc(inlen + EVP_CIPHER_CTX_block_size(&ctx)))) {
88		PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,ERR_R_MALLOC_FAILURE);
89		goto err;
90	}
91
92	EVP_CipherUpdate(&ctx, out, &i, in, inlen);
93	outlen = i;
94	if(!EVP_CipherFinal_ex(&ctx, out + i, &i)) {
95		OPENSSL_free(out);
96		out = NULL;
97		PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,PKCS12_R_PKCS12_CIPHERFINAL_ERROR);
98		goto err;
99	}
100	outlen += i;
101	if (datalen) *datalen = outlen;
102	if (data) *data = out;
103	err:
104	EVP_CIPHER_CTX_cleanup(&ctx);
105	return out;
106
107}
108
109/* Decrypt an OCTET STRING and decode ASN1 structure
110 * if zbuf set zero buffer after use.
111 */
112
113void * PKCS12_item_decrypt_d2i(X509_ALGOR *algor, const ASN1_ITEM *it,
114	     const char *pass, int passlen, ASN1_OCTET_STRING *oct, int zbuf)
115{
116	unsigned char *out, *p;
117	void *ret;
118	int outlen;
119
120	if (!PKCS12_pbe_crypt(algor, pass, passlen, oct->data, oct->length,
121			       &out, &outlen, 0)) {
122		PKCS12err(PKCS12_F_PKCS12_DECRYPT_D2I,PKCS12_R_PKCS12_PBE_CRYPT_ERROR);
123		return NULL;
124	}
125	p = out;
126#ifdef DEBUG_DECRYPT
127	{
128		FILE *op;
129
130		char fname[30];
131		static int fnm = 1;
132		sprintf(fname, "DER%d", fnm++);
133		op = fopen(fname, "wb");
134		fwrite (p, 1, outlen, op);
135		fclose(op);
136	}
137#endif
138	ret = ASN1_item_d2i(NULL, &p, outlen, it);
139	if (zbuf) OPENSSL_cleanse(out, outlen);
140	if(!ret) PKCS12err(PKCS12_F_PKCS12_DECRYPT_D2I,PKCS12_R_DECODE_ERROR);
141	OPENSSL_free(out);
142	return ret;
143}
144
145/* Encode ASN1 structure and encrypt, return OCTET STRING
146 * if zbuf set zero encoding.
147 */
148
149ASN1_OCTET_STRING *PKCS12_item_i2d_encrypt(X509_ALGOR *algor, const ASN1_ITEM *it,
150				       const char *pass, int passlen,
151				       void *obj, int zbuf)
152{
153	ASN1_OCTET_STRING *oct;
154	unsigned char *in = NULL;
155	int inlen;
156	if (!(oct = M_ASN1_OCTET_STRING_new ())) {
157		PKCS12err(PKCS12_F_PKCS12_I2D_ENCRYPT,ERR_R_MALLOC_FAILURE);
158		return NULL;
159	}
160	inlen = ASN1_item_i2d(obj, &in, it);
161	if (!in) {
162		PKCS12err(PKCS12_F_PKCS12_I2D_ENCRYPT,PKCS12_R_ENCODE_ERROR);
163		return NULL;
164	}
165	if (!PKCS12_pbe_crypt(algor, pass, passlen, in, inlen, &oct->data,
166				 &oct->length, 1)) {
167		PKCS12err(PKCS12_F_PKCS12_I2D_ENCRYPT,PKCS12_R_ENCRYPT_ERROR);
168		OPENSSL_free(in);
169		return NULL;
170	}
171	if (zbuf) OPENSSL_cleanse(in, inlen);
172	OPENSSL_free(in);
173	return oct;
174}
175
176IMPLEMENT_PKCS12_STACK_OF(PKCS7)
177