1 /* $OpenBSD: p_legacy.c,v 1.6 2024/04/09 13:52:41 beck Exp $ */
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 <stdlib.h>
60
61 #include <openssl/evp.h>
62 #include <openssl/err.h>
63
64 #include <openssl/rsa.h>
65
66 #include "evp_local.h"
67
68 int
EVP_PKEY_decrypt_old(unsigned char * to,const unsigned char * from,int from_len,EVP_PKEY * pkey)69 EVP_PKEY_decrypt_old(unsigned char *to, const unsigned char *from, int from_len,
70 EVP_PKEY *pkey)
71 {
72 if (pkey->type != EVP_PKEY_RSA) {
73 EVPerror(EVP_R_PUBLIC_KEY_NOT_RSA);
74 return -1;
75 }
76
77 return RSA_private_decrypt(from_len, from, to, pkey->pkey.rsa,
78 RSA_PKCS1_PADDING);
79 }
80 LCRYPTO_ALIAS(EVP_PKEY_decrypt_old);
81
82 int
EVP_PKEY_encrypt_old(unsigned char * to,const unsigned char * from,int from_len,EVP_PKEY * pkey)83 EVP_PKEY_encrypt_old(unsigned char *to, const unsigned char *from, int from_len,
84 EVP_PKEY *pkey)
85 {
86 if (pkey->type != EVP_PKEY_RSA) {
87 EVPerror(EVP_R_PUBLIC_KEY_NOT_RSA);
88 return 0;
89 }
90
91 return RSA_public_encrypt(from_len, from, to, pkey->pkey.rsa,
92 RSA_PKCS1_PADDING);
93 }
94 LCRYPTO_ALIAS(EVP_PKEY_encrypt_old);
95
96 int
EVP_OpenInit(EVP_CIPHER_CTX * ctx,const EVP_CIPHER * type,const unsigned char * ek,int ekl,const unsigned char * iv,EVP_PKEY * priv)97 EVP_OpenInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,
98 const unsigned char *ek, int ekl, const unsigned char *iv, EVP_PKEY *priv)
99 {
100 unsigned char *key = NULL;
101 int i, size = 0, ret = 0;
102
103 if (type) {
104 if (!EVP_CIPHER_CTX_reset(ctx))
105 return 0;
106 if (!EVP_DecryptInit_ex(ctx, type, NULL, NULL, NULL))
107 return 0;
108 }
109
110 if (!priv)
111 return 1;
112
113 if (priv->type != EVP_PKEY_RSA) {
114 EVPerror(EVP_R_PUBLIC_KEY_NOT_RSA);
115 goto err;
116 }
117
118 size = RSA_size(priv->pkey.rsa);
119 key = malloc(size + 2);
120 if (key == NULL) {
121 /* ERROR */
122 EVPerror(ERR_R_MALLOC_FAILURE);
123 goto err;
124 }
125
126 i = EVP_PKEY_decrypt_old(key, ek, ekl, priv);
127 if ((i <= 0) || !EVP_CIPHER_CTX_set_key_length(ctx, i)) {
128 /* ERROR */
129 goto err;
130 }
131 if (!EVP_DecryptInit_ex(ctx, NULL, NULL, key, iv))
132 goto err;
133
134 ret = 1;
135
136 err:
137 freezero(key, size);
138 return (ret);
139 }
140 LCRYPTO_ALIAS(EVP_OpenInit);
141
142 int
EVP_OpenFinal(EVP_CIPHER_CTX * ctx,unsigned char * out,int * outl)143 EVP_OpenFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
144 {
145 int i;
146
147 i = EVP_DecryptFinal_ex(ctx, out, outl);
148 if (i)
149 i = EVP_DecryptInit_ex(ctx, NULL, NULL, NULL, NULL);
150 return (i);
151 }
152 LCRYPTO_ALIAS(EVP_OpenFinal);
153
154 int
EVP_SealInit(EVP_CIPHER_CTX * ctx,const EVP_CIPHER * type,unsigned char ** ek,int * ekl,unsigned char * iv,EVP_PKEY ** pubk,int npubk)155 EVP_SealInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type, unsigned char **ek,
156 int *ekl, unsigned char *iv, EVP_PKEY **pubk, int npubk)
157 {
158 unsigned char key[EVP_MAX_KEY_LENGTH];
159 int i, iv_len;
160
161 if (type) {
162 if (!EVP_CIPHER_CTX_reset(ctx))
163 return 0;
164 if (!EVP_EncryptInit_ex(ctx, type, NULL, NULL, NULL))
165 return 0;
166 }
167 if ((npubk <= 0) || !pubk)
168 return 1;
169 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
170 return 0;
171 /* XXX - upper bound? */
172 if ((iv_len = EVP_CIPHER_CTX_iv_length(ctx)) < 0)
173 return 0;
174 if (iv_len > 0)
175 arc4random_buf(iv, iv_len);
176
177 if (!EVP_EncryptInit_ex(ctx, NULL, NULL, key, iv))
178 return 0;
179
180 for (i = 0; i < npubk; i++) {
181 ekl[i] = EVP_PKEY_encrypt_old(ek[i], key,
182 EVP_CIPHER_CTX_key_length(ctx), pubk[i]);
183 if (ekl[i] <= 0)
184 return (-1);
185 }
186 return (npubk);
187 }
188 LCRYPTO_ALIAS(EVP_SealInit);
189
190 int
EVP_SealFinal(EVP_CIPHER_CTX * ctx,unsigned char * out,int * outl)191 EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
192 {
193 int i;
194
195 i = EVP_EncryptFinal_ex(ctx, out, outl);
196 if (i)
197 i = EVP_EncryptInit_ex(ctx, NULL, NULL, NULL, NULL);
198 return i;
199 }
200 LCRYPTO_ALIAS(EVP_SealFinal);
201