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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 | |
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_CIPHER
INIT_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 if (!EVP_CipherUpdate(&ctx, out, &i, in, inlen)) | |
93 { | |
94 OPENSSL_free(out); | |
95 out = NULL; | |
96 PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,ERR_R_EVP_LIB); | |
97 goto err; | |
98 } | |
99 | |
100 outlen = i; | |
101 if(!EVP_CipherFinal_ex(&ctx, out + i, &i)) { | |
102 OPENSSL_free(out); | |
103 out = NULL; | |
104 PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,PKCS12_R_PKCS12_CIPHERFINAL_
ERROR); | |
105 goto err; | |
106 } | |
107 outlen += i; | |
108 if (datalen) *datalen = outlen; | |
109 if (data) *data = out; | |
110 err: | |
111 EVP_CIPHER_CTX_cleanup(&ctx); | |
112 return out; | |
113 | |
114 } | |
115 | |
116 /* Decrypt an OCTET STRING and decode ASN1 structure | |
117 * if zbuf set zero buffer after use. | |
118 */ | |
119 | |
120 void * PKCS12_item_decrypt_d2i(X509_ALGOR *algor, const ASN1_ITEM *it, | |
121 const char *pass, int passlen, ASN1_OCTET_STRING *oct, int zbuf) | |
122 { | |
123 unsigned char *out; | |
124 const unsigned char *p; | |
125 void *ret; | |
126 int outlen; | |
127 | |
128 if (!PKCS12_pbe_crypt(algor, pass, passlen, oct->data, oct->length, | |
129 &out, &outlen, 0)) { | |
130 PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I,PKCS12_R_PKCS12_PBE_C
RYPT_ERROR); | |
131 return NULL; | |
132 } | |
133 p = out; | |
134 #ifdef DEBUG_DECRYPT | |
135 { | |
136 FILE *op; | |
137 | |
138 char fname[30]; | |
139 static int fnm = 1; | |
140 sprintf(fname, "DER%d", fnm++); | |
141 op = fopen(fname, "wb"); | |
142 fwrite (p, 1, outlen, op); | |
143 fclose(op); | |
144 } | |
145 #endif | |
146 ret = ASN1_item_d2i(NULL, &p, outlen, it); | |
147 if (zbuf) OPENSSL_cleanse(out, outlen); | |
148 if(!ret) PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I,PKCS12_R_DECODE_ERRO
R); | |
149 OPENSSL_free(out); | |
150 return ret; | |
151 } | |
152 | |
153 /* Encode ASN1 structure and encrypt, return OCTET STRING | |
154 * if zbuf set zero encoding. | |
155 */ | |
156 | |
157 ASN1_OCTET_STRING *PKCS12_item_i2d_encrypt(X509_ALGOR *algor, const ASN1_ITEM *i
t, | |
158 const char *pass, int passlen, | |
159 void *obj, int zbuf) | |
160 { | |
161 ASN1_OCTET_STRING *oct; | |
162 unsigned char *in = NULL; | |
163 int inlen; | |
164 if (!(oct = M_ASN1_OCTET_STRING_new ())) { | |
165 PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,ERR_R_MALLOC_FAILURE)
; | |
166 return NULL; | |
167 } | |
168 inlen = ASN1_item_i2d(obj, &in, it); | |
169 if (!in) { | |
170 PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,PKCS12_R_ENCODE_ERROR
); | |
171 return NULL; | |
172 } | |
173 if (!PKCS12_pbe_crypt(algor, pass, passlen, in, inlen, &oct->data, | |
174 &oct->length, 1)) { | |
175 PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,PKCS12_R_ENCRYPT_ERRO
R); | |
176 OPENSSL_free(in); | |
177 return NULL; | |
178 } | |
179 if (zbuf) OPENSSL_cleanse(in, inlen); | |
180 OPENSSL_free(in); | |
181 return oct; | |
182 } | |
183 | |
184 IMPLEMENT_PKCS12_STACK_OF(PKCS7) | |
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