1 /* Copyright (C) 1995-1998 Eric Young ([email protected])
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young ([email protected]).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson ([email protected]).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young ([email protected])"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson ([email protected])"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57 #include <openssl/cipher.h>
58
59 #include <assert.h>
60 #include <string.h>
61
62 #include <openssl/err.h>
63 #include <openssl/mem.h>
64 #include <openssl/nid.h>
65
66 #include "internal.h"
67 #include "../internal.h"
68
69
70 static const struct {
71 int nid;
72 const char *name;
73 const EVP_CIPHER *(*func)(void);
74 } kCiphers[] = {
75 {NID_aes_128_cbc, "aes-128-cbc", EVP_aes_128_cbc},
76 {NID_aes_128_ctr, "aes-128-ctr", EVP_aes_128_ctr},
77 {NID_aes_128_ecb, "aes-128-ecb", EVP_aes_128_ecb},
78 {NID_aes_128_gcm, "aes-128-gcm", EVP_aes_128_gcm},
79 {NID_aes_128_ofb128, "aes-128-ofb", EVP_aes_128_ofb},
80 {NID_aes_192_cbc, "aes-192-cbc", EVP_aes_192_cbc},
81 {NID_aes_192_ctr, "aes-192-ctr", EVP_aes_192_ctr},
82 {NID_aes_192_ecb, "aes-192-ecb", EVP_aes_192_ecb},
83 {NID_aes_192_gcm, "aes-192-gcm", EVP_aes_192_gcm},
84 {NID_aes_192_ofb128, "aes-192-ofb", EVP_aes_192_ofb},
85 {NID_aes_256_cbc, "aes-256-cbc", EVP_aes_256_cbc},
86 {NID_aes_256_ctr, "aes-256-ctr", EVP_aes_256_ctr},
87 {NID_aes_256_ecb, "aes-256-ecb", EVP_aes_256_ecb},
88 {NID_aes_256_gcm, "aes-256-gcm", EVP_aes_256_gcm},
89 {NID_aes_256_ofb128, "aes-256-ofb", EVP_aes_256_ofb},
90 {NID_des_cbc, "des-cbc", EVP_des_cbc},
91 {NID_des_ecb, "des-ecb", EVP_des_ecb},
92 {NID_des_ede_cbc, "des-ede-cbc", EVP_des_ede_cbc},
93 {NID_des_ede_ecb, "des-ede", EVP_des_ede},
94 {NID_des_ede3_cbc, "des-ede3-cbc", EVP_des_ede3_cbc},
95 {NID_rc2_cbc, "rc2-cbc", EVP_rc2_cbc},
96 {NID_rc4, "rc4", EVP_rc4},
97 };
98
EVP_get_cipherbynid(int nid)99 const EVP_CIPHER *EVP_get_cipherbynid(int nid) {
100 for (size_t i = 0; i < OPENSSL_ARRAY_SIZE(kCiphers); i++) {
101 if (kCiphers[i].nid == nid) {
102 return kCiphers[i].func();
103 }
104 }
105 return NULL;
106 }
107
EVP_get_cipherbyname(const char * name)108 const EVP_CIPHER *EVP_get_cipherbyname(const char *name) {
109 if (name == NULL) {
110 return NULL;
111 }
112
113 // This is not a name used by OpenSSL, but tcpdump registers it with
114 // |EVP_add_cipher_alias|. Our |EVP_add_cipher_alias| is a no-op, so we
115 // support the name here.
116 if (OPENSSL_strcasecmp(name, "3des") == 0) {
117 name = "des-ede3-cbc";
118 }
119
120 for (size_t i = 0; i < OPENSSL_ARRAY_SIZE(kCiphers); i++) {
121 if (OPENSSL_strcasecmp(kCiphers[i].name, name) == 0) {
122 return kCiphers[i].func();
123 }
124 }
125
126 return NULL;
127 }
128