• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /* p12_decr.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) 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 
PKCS12_pbe_crypt(X509_ALGOR * algor,const char * pass,int passlen,unsigned char * in,int inlen,unsigned char ** data,int * datalen,int en_de)71 unsigned 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 
PKCS12_item_decrypt_d2i(X509_ALGOR * algor,const ASN1_ITEM * it,const char * pass,int passlen,ASN1_OCTET_STRING * oct,int zbuf)113 void * 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;
117 	const unsigned char *p;
118 	void *ret;
119 	int outlen;
120 
121 	if (!PKCS12_pbe_crypt(algor, pass, passlen, oct->data, oct->length,
122 			       &out, &outlen, 0)) {
123 		PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I,PKCS12_R_PKCS12_PBE_CRYPT_ERROR);
124 		return NULL;
125 	}
126 	p = out;
127 #ifdef DEBUG_DECRYPT
128 	{
129 		FILE *op;
130 
131 		char fname[30];
132 		static int fnm = 1;
133 		sprintf(fname, "DER%d", fnm++);
134 		op = fopen(fname, "wb");
135 		fwrite (p, 1, outlen, op);
136 		fclose(op);
137 	}
138 #endif
139 	ret = ASN1_item_d2i(NULL, &p, outlen, it);
140 	if (zbuf) OPENSSL_cleanse(out, outlen);
141 	if(!ret) PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I,PKCS12_R_DECODE_ERROR);
142 	OPENSSL_free(out);
143 	return ret;
144 }
145 
146 /* Encode ASN1 structure and encrypt, return OCTET STRING
147  * if zbuf set zero encoding.
148  */
149 
PKCS12_item_i2d_encrypt(X509_ALGOR * algor,const ASN1_ITEM * it,const char * pass,int passlen,void * obj,int zbuf)150 ASN1_OCTET_STRING *PKCS12_item_i2d_encrypt(X509_ALGOR *algor, const ASN1_ITEM *it,
151 				       const char *pass, int passlen,
152 				       void *obj, int zbuf)
153 {
154 	ASN1_OCTET_STRING *oct;
155 	unsigned char *in = NULL;
156 	int inlen;
157 	if (!(oct = M_ASN1_OCTET_STRING_new ())) {
158 		PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,ERR_R_MALLOC_FAILURE);
159 		return NULL;
160 	}
161 	inlen = ASN1_item_i2d(obj, &in, it);
162 	if (!in) {
163 		PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,PKCS12_R_ENCODE_ERROR);
164 		return NULL;
165 	}
166 	if (!PKCS12_pbe_crypt(algor, pass, passlen, in, inlen, &oct->data,
167 				 &oct->length, 1)) {
168 		PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,PKCS12_R_ENCRYPT_ERROR);
169 		OPENSSL_free(in);
170 		return NULL;
171 	}
172 	if (zbuf) OPENSSL_cleanse(in, inlen);
173 	OPENSSL_free(in);
174 	return oct;
175 }
176 
177 IMPLEMENT_PKCS12_STACK_OF(PKCS7)
178