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57ae2e24 | 1 | /* crypto/evp/e_rc5.c */ |
58964a49 RE |
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. | |
ae5c8664 | 8 | * |
58964a49 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). | |
ae5c8664 | 15 | * |
58964a49 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. | |
ae5c8664 | 22 | * |
58964a49 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 :-). | |
ae5c8664 | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
58964a49 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
ae5c8664 | 40 | * |
58964a49 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. | |
ae5c8664 | 52 | * |
58964a49 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 | ||
58964a49 RE |
59 | #include <stdio.h> |
60 | #include "cryptlib.h" | |
f1185145 RL |
61 | |
62 | #ifndef OPENSSL_NO_RC5 | |
63 | ||
ae5c8664 MC |
64 | # include <openssl/evp.h> |
65 | # include <openssl/objects.h> | |
66 | # include "evp_locl.h" | |
67 | # include <openssl/rc5.h> | |
58964a49 | 68 | |
1921eaad | 69 | static int r_32_12_16_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
ae5c8664 | 70 | const unsigned char *iv, int enc); |
49528751 | 71 | static int rc5_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); |
57ae2e24 | 72 | |
ae5c8664 MC |
73 | typedef struct { |
74 | int rounds; /* number of rounds */ | |
75 | RC5_32_KEY ks; /* key schedule */ | |
76 | } EVP_RC5_KEY; | |
49528751 | 77 | |
ae5c8664 | 78 | # define data(ctx) EVP_C_DATA(EVP_RC5_KEY,ctx) |
57ae2e24 | 79 | |
dbad1690 | 80 | IMPLEMENT_BLOCK_CIPHER(rc5_32_12_16, ks, RC5_32, EVP_RC5_KEY, NID_rc5, |
ae5c8664 MC |
81 | 8, RC5_32_KEY_LENGTH, 8, 64, |
82 | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, | |
83 | r_32_12_16_init_key, NULL, NULL, NULL, rc5_ctrl) | |
58964a49 | 84 | |
49528751 | 85 | static int rc5_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) |
ae5c8664 MC |
86 | { |
87 | switch (type) { | |
88 | case EVP_CTRL_INIT: | |
89 | data(c)->rounds = RC5_12_ROUNDS; | |
90 | return 1; | |
91 | ||
92 | case EVP_CTRL_GET_RC5_ROUNDS: | |
93 | *(int *)ptr = data(c)->rounds; | |
94 | return 1; | |
49528751 | 95 | |
ae5c8664 MC |
96 | case EVP_CTRL_SET_RC5_ROUNDS: |
97 | switch (arg) { | |
98 | case RC5_8_ROUNDS: | |
99 | case RC5_12_ROUNDS: | |
100 | case RC5_16_ROUNDS: | |
101 | data(c)->rounds = arg; | |
102 | return 1; | |
49528751 | 103 | |
ae5c8664 MC |
104 | default: |
105 | EVPerr(EVP_F_RC5_CTRL, EVP_R_UNSUPORTED_NUMBER_OF_ROUNDS); | |
106 | return 0; | |
107 | } | |
49528751 | 108 | |
ae5c8664 MC |
109 | default: |
110 | return -1; | |
111 | } | |
112 | } | |
49528751 | 113 | |
1921eaad | 114 | static int r_32_12_16_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
ae5c8664 MC |
115 | const unsigned char *iv, int enc) |
116 | { | |
117 | RC5_32_set_key(&data(ctx)->ks, EVP_CIPHER_CTX_key_length(ctx), | |
118 | key, data(ctx)->rounds); | |
119 | return 1; | |
120 | } | |
58964a49 RE |
121 | |
122 | #endif |