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d02b48c6 | 1 | /* crypto/evp/p_seal.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
3 | * All rights reserved. |
4 | * | |
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. | |
0f113f3e | 8 | * |
d02b48c6 RE |
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). | |
0f113f3e | 15 | * |
d02b48c6 RE |
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. | |
0f113f3e | 22 | * |
d02b48c6 RE |
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 :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
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. | |
0f113f3e | 52 | * |
d02b48c6 RE |
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.] | |
57 | */ | |
58 | ||
59 | #include <stdio.h> | |
b39fc560 | 60 | #include "internal/cryptlib.h" |
ec577822 | 61 | #include <openssl/rand.h> |
cf1b7d96 | 62 | #ifndef OPENSSL_NO_RSA |
0f113f3e | 63 | # include <openssl/rsa.h> |
f5d7a031 | 64 | #endif |
ec577822 BM |
65 | #include <openssl/evp.h> |
66 | #include <openssl/objects.h> | |
67 | #include <openssl/x509.h> | |
d02b48c6 | 68 | |
0f113f3e MC |
69 | int EVP_SealInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type, |
70 | unsigned char **ek, int *ekl, unsigned char *iv, | |
71 | EVP_PKEY **pubk, int npubk) | |
72 | { | |
73 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
74 | int i; | |
75 | ||
76 | if (type) { | |
77 | EVP_CIPHER_CTX_init(ctx); | |
78 | if (!EVP_EncryptInit_ex(ctx, type, NULL, NULL, NULL)) | |
79 | return 0; | |
80 | } | |
81 | if ((npubk <= 0) || !pubk) | |
82 | return 1; | |
83 | if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0) | |
84 | return 0; | |
266483d2 MC |
85 | if (EVP_CIPHER_CTX_iv_length(ctx) |
86 | && RAND_bytes(iv, EVP_CIPHER_CTX_iv_length(ctx)) <= 0) | |
87 | return 0; | |
d02b48c6 | 88 | |
0f113f3e MC |
89 | if (!EVP_EncryptInit_ex(ctx, NULL, NULL, key, iv)) |
90 | return 0; | |
58964a49 | 91 | |
0f113f3e MC |
92 | for (i = 0; i < npubk; i++) { |
93 | ekl[i] = | |
94 | EVP_PKEY_encrypt_old(ek[i], key, EVP_CIPHER_CTX_key_length(ctx), | |
95 | pubk[i]); | |
96 | if (ekl[i] <= 0) | |
97 | return (-1); | |
98 | } | |
99 | return (npubk); | |
100 | } | |
d02b48c6 | 101 | |
1d97c843 | 102 | /*- MACRO |
d02b48c6 RE |
103 | void EVP_SealUpdate(ctx,out,outl,in,inl) |
104 | EVP_CIPHER_CTX *ctx; | |
105 | unsigned char *out; | |
106 | int *outl; | |
107 | unsigned char *in; | |
108 | int inl; | |
0f113f3e MC |
109 | { |
110 | EVP_EncryptUpdate(ctx,out,outl,in,inl); | |
111 | } | |
d02b48c6 RE |
112 | */ |
113 | ||
e9ba6963 | 114 | int EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
115 | { |
116 | int i; | |
117 | i = EVP_EncryptFinal_ex(ctx, out, outl); | |
118 | if (i) | |
119 | i = EVP_EncryptInit_ex(ctx, NULL, NULL, NULL, NULL); | |
120 | return i; | |
121 | } |