1 /* crypto/evp/p_seal.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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"
61 #include <openssl/rand.h>
62 #ifndef OPENSSL_NO_RSA
63 #include <openssl/rsa.h>
64 #endif
65 #include <openssl/evp.h>
66 #include <openssl/objects.h>
67 #include <openssl/x509.h>
68
EVP_SealInit(EVP_CIPHER_CTX * ctx,const EVP_CIPHER * type,unsigned char ** ek,int * ekl,unsigned char * iv,EVP_PKEY ** pubk,int npubk)69 int EVP_SealInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type, unsigned char **ek,
70 int *ekl, unsigned char *iv, EVP_PKEY **pubk, int npubk)
71 {
72 unsigned char key[EVP_MAX_KEY_LENGTH];
73 int i;
74
75 if(type) {
76 EVP_CIPHER_CTX_init(ctx);
77 if(!EVP_EncryptInit_ex(ctx,type,NULL,NULL,NULL)) return 0;
78 }
79 if ((npubk <= 0) || !pubk)
80 return 1;
81 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
82 return 0;
83 if (EVP_CIPHER_CTX_iv_length(ctx))
84 RAND_pseudo_bytes(iv,EVP_CIPHER_CTX_iv_length(ctx));
85
86 if(!EVP_EncryptInit_ex(ctx,NULL,NULL,key,iv)) return 0;
87
88 for (i=0; i<npubk; i++)
89 {
90 ekl[i]=EVP_PKEY_encrypt_old(ek[i],key,EVP_CIPHER_CTX_key_length(ctx),
91 pubk[i]);
92 if (ekl[i] <= 0) return(-1);
93 }
94 return(npubk);
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
EVP_SealFinal(EVP_CIPHER_CTX * ctx,unsigned char * out,int * outl)109 int EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
110 {
111 int i;
112 i = EVP_EncryptFinal_ex(ctx,out,outl);
113 EVP_EncryptInit_ex(ctx,NULL,NULL,NULL,NULL);
114 return i;
115 }
116