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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. | |
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.] | |
57 | */ | |
58 | ||
59 | #include <stdio.h> | |
60 | #include "cryptlib.h" | |
ec577822 | 61 | #include <openssl/rand.h> |
cf1b7d96 | 62 | #ifndef OPENSSL_NO_RSA |
ec577822 | 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 | |
de822715 | 69 | int EVP_SealInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type, unsigned char **ek, |
6b691a5c | 70 | int *ekl, unsigned char *iv, EVP_PKEY **pubk, int npubk) |
d02b48c6 RE |
71 | { |
72 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
58964a49 | 73 | int i; |
d02b48c6 | 74 | |
49528751 DSH |
75 | if(type) { |
76 | EVP_CIPHER_CTX_init(ctx); | |
581f1c84 | 77 | if(!EVP_EncryptInit_ex(ctx,type,NULL,NULL,NULL)) return 0; |
49528751 | 78 | } |
6a0dec95 DSH |
79 | if ((npubk <= 0) || !pubk) |
80 | return 1; | |
216659eb | 81 | if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0) |
6a0dec95 | 82 | return 0; |
49528751 DSH |
83 | if (EVP_CIPHER_CTX_iv_length(ctx)) |
84 | RAND_pseudo_bytes(iv,EVP_CIPHER_CTX_iv_length(ctx)); | |
d02b48c6 | 85 | |
581f1c84 | 86 | if(!EVP_EncryptInit_ex(ctx,NULL,NULL,key,iv)) return 0; |
58964a49 | 87 | |
d02b48c6 RE |
88 | for (i=0; i<npubk; i++) |
89 | { | |
f733a5ef | 90 | ekl[i]=EVP_PKEY_encrypt_old(ek[i],key,EVP_CIPHER_CTX_key_length(ctx), |
58964a49 RE |
91 | pubk[i]); |
92 | if (ekl[i] <= 0) return(-1); | |
d02b48c6 | 93 | } |
58964a49 | 94 | return(npubk); |
d02b48c6 RE |
95 | } |
96 | ||
97 | /* MACRO | |
98 | void EVP_SealUpdate(ctx,out,outl,in,inl) | |
99 | EVP_CIPHER_CTX *ctx; | |
100 | unsigned char *out; | |
101 | int *outl; | |
102 | unsigned char *in; | |
103 | int inl; | |
104 | { | |
105 | EVP_EncryptUpdate(ctx,out,outl,in,inl); | |
106 | } | |
107 | */ | |
108 | ||
e9ba6963 | 109 | int EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
d02b48c6 | 110 | { |
e9ba6963 DSH |
111 | int i; |
112 | i = EVP_EncryptFinal_ex(ctx,out,outl); | |
b6dcdbfc DSH |
113 | if (i) |
114 | i = EVP_EncryptInit_ex(ctx,NULL,NULL,NULL,NULL); | |
e9ba6963 | 115 | return i; |
d02b48c6 | 116 | } |