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031e5cce SM |
1 | /* crypto/evp/p_open.c */ |
2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
3 | * All rights reserved. | |
3e575651 | 4 | * |
031e5cce SM |
5 | * This package is an SSL implementation written |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
8 | * | |
9 | * This library is free for commercial and non-commercial use as long as | |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
15 | * | |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in | |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
22 | * | |
23 | * Redistribution and use in source and binary forms, with or without | |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
37 | * 4. If you include any Windows specific code (or a derivative thereof) from | |
38 | * the apps directory (application code) you must include an acknowledgement: | |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40 | * | |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
52 | * | |
53 | * The licence and distribution terms for any publically available version or | |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
3e575651 SL |
57 | */ |
58 | ||
031e5cce SM |
59 | #include <stdio.h> |
60 | #include "cryptlib.h" | |
61 | ||
62 | #ifndef OPENSSL_NO_RSA | |
3e575651 | 63 | |
d3819813 MTL |
64 | # include <openssl/evp.h> |
65 | # include <openssl/objects.h> | |
66 | # include <openssl/x509.h> | |
67 | # include <openssl/rsa.h> | |
3e575651 SL |
68 | |
69 | int EVP_OpenInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type, | |
d3819813 MTL |
70 | const unsigned char *ek, int ekl, const unsigned char *iv, |
71 | EVP_PKEY *priv) | |
72 | { | |
73 | unsigned char *key = NULL; | |
74 | int i, size = 0, ret = 0; | |
3e575651 | 75 | |
d3819813 | 76 | if (type) { |
031e5cce | 77 | EVP_CIPHER_CTX_init(ctx); |
d3819813 MTL |
78 | if (!EVP_DecryptInit_ex(ctx, type, NULL, NULL, NULL)) |
79 | return 0; | |
80 | } | |
3e575651 | 81 | |
d3819813 MTL |
82 | if (!priv) |
83 | return 1; | |
3e575651 | 84 | |
031e5cce | 85 | if (priv->type != EVP_PKEY_RSA) { |
d3819813 MTL |
86 | EVPerr(EVP_F_EVP_OPENINIT, EVP_R_PUBLIC_KEY_NOT_RSA); |
87 | goto err; | |
88 | } | |
3e575651 | 89 | |
031e5cce SM |
90 | size = RSA_size(priv->pkey.rsa); |
91 | key = (unsigned char *)OPENSSL_malloc(size + 2); | |
d3819813 MTL |
92 | if (key == NULL) { |
93 | /* ERROR */ | |
94 | EVPerr(EVP_F_EVP_OPENINIT, ERR_R_MALLOC_FAILURE); | |
95 | goto err; | |
96 | } | |
3e575651 | 97 | |
d3819813 MTL |
98 | i = EVP_PKEY_decrypt_old(key, ek, ekl, priv); |
99 | if ((i <= 0) || !EVP_CIPHER_CTX_set_key_length(ctx, i)) { | |
100 | /* ERROR */ | |
101 | goto err; | |
102 | } | |
103 | if (!EVP_DecryptInit_ex(ctx, NULL, NULL, key, iv)) | |
104 | goto err; | |
3e575651 | 105 | |
d3819813 MTL |
106 | ret = 1; |
107 | err: | |
031e5cce SM |
108 | if (key != NULL) |
109 | OPENSSL_cleanse(key, size); | |
110 | OPENSSL_free(key); | |
d3819813 MTL |
111 | return (ret); |
112 | } | |
3e575651 SL |
113 | |
114 | int EVP_OpenFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
d3819813 MTL |
115 | { |
116 | int i; | |
3e575651 | 117 | |
d3819813 MTL |
118 | i = EVP_DecryptFinal_ex(ctx, out, outl); |
119 | if (i) | |
120 | i = EVP_DecryptInit_ex(ctx, NULL, NULL, NULL, NULL); | |
121 | return (i); | |
122 | } | |
031e5cce SM |
123 | #else /* !OPENSSL_NO_RSA */ |
124 | ||
125 | # ifdef PEDANTIC | |
126 | static void *dummy = &dummy; | |
127 | # endif | |
128 | ||
3e575651 | 129 | #endif |