]>
Commit | Line | Data |
---|---|---|
57ae2e24 | 1 | /* crypto/evp/e_rc2.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. | |
0f113f3e | 8 | * |
d02b48c6 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). | |
0f113f3e | 15 | * |
d02b48c6 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. | |
0f113f3e | 22 | * |
d02b48c6 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 :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 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. | |
0f113f3e | 52 | * |
d02b48c6 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 | ||
d02b48c6 | 59 | #include <stdio.h> |
b39fc560 | 60 | #include "internal/cryptlib.h" |
c7e7fc3e RL |
61 | |
62 | #ifndef OPENSSL_NO_RC2 | |
63 | ||
0f113f3e MC |
64 | # include <openssl/evp.h> |
65 | # include <openssl/objects.h> | |
6435f0f6 | 66 | # include "internal/evp_int.h" |
0f113f3e | 67 | # include <openssl/rc2.h> |
d02b48c6 | 68 | |
1921eaad | 69 | static int rc2_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
0f113f3e | 70 | const unsigned char *iv, int enc); |
49528751 DSH |
71 | static int rc2_meth_to_magic(EVP_CIPHER_CTX *ctx); |
72 | static int rc2_magic_to_meth(int i); | |
dfeab068 RE |
73 | static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type); |
74 | static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type); | |
49528751 | 75 | static int rc2_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); |
dfeab068 | 76 | |
0f113f3e MC |
77 | typedef struct { |
78 | int key_bits; /* effective key bits */ | |
79 | RC2_KEY ks; /* key schedule */ | |
80 | } EVP_RC2_KEY; | |
dbad1690 | 81 | |
6435f0f6 | 82 | # define data(ctx) EVP_C_DATA(EVP_RC2_KEY,ctx) |
dbad1690 BL |
83 | |
84 | IMPLEMENT_BLOCK_CIPHER(rc2, ks, RC2, EVP_RC2_KEY, NID_rc2, | |
0f113f3e MC |
85 | 8, |
86 | RC2_KEY_LENGTH, 8, 64, | |
87 | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, | |
88 | rc2_init_key, NULL, | |
89 | rc2_set_asn1_type_and_iv, rc2_get_asn1_type_and_iv, | |
90 | rc2_ctrl) | |
91 | # define RC2_40_MAGIC 0xa0 | |
92 | # define RC2_64_MAGIC 0x78 | |
93 | # define RC2_128_MAGIC 0x3a | |
94 | static const EVP_CIPHER r2_64_cbc_cipher = { | |
95 | NID_rc2_64_cbc, | |
96 | 8, 8 /* 64 bit */ , 8, | |
97 | EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, | |
98 | rc2_init_key, | |
99 | rc2_cbc_cipher, | |
100 | NULL, | |
101 | sizeof(EVP_RC2_KEY), | |
102 | rc2_set_asn1_type_and_iv, | |
103 | rc2_get_asn1_type_and_iv, | |
104 | rc2_ctrl, | |
105 | NULL | |
106 | }; | |
107 | ||
108 | static const EVP_CIPHER r2_40_cbc_cipher = { | |
109 | NID_rc2_40_cbc, | |
110 | 8, 5 /* 40 bit */ , 8, | |
111 | EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, | |
112 | rc2_init_key, | |
113 | rc2_cbc_cipher, | |
114 | NULL, | |
115 | sizeof(EVP_RC2_KEY), | |
116 | rc2_set_asn1_type_and_iv, | |
117 | rc2_get_asn1_type_and_iv, | |
118 | rc2_ctrl, | |
119 | NULL | |
120 | }; | |
d02b48c6 | 121 | |
13588350 | 122 | const EVP_CIPHER *EVP_rc2_64_cbc(void) |
0f113f3e MC |
123 | { |
124 | return (&r2_64_cbc_cipher); | |
125 | } | |
dfeab068 | 126 | |
13588350 | 127 | const EVP_CIPHER *EVP_rc2_40_cbc(void) |
0f113f3e MC |
128 | { |
129 | return (&r2_40_cbc_cipher); | |
130 | } | |
131 | ||
1921eaad | 132 | static int rc2_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
0f113f3e MC |
133 | const unsigned char *iv, int enc) |
134 | { | |
135 | RC2_set_key(&data(ctx)->ks, EVP_CIPHER_CTX_key_length(ctx), | |
136 | key, data(ctx)->key_bits); | |
137 | return 1; | |
138 | } | |
d02b48c6 | 139 | |
49528751 | 140 | static int rc2_meth_to_magic(EVP_CIPHER_CTX *e) |
0f113f3e MC |
141 | { |
142 | int i; | |
143 | ||
144 | EVP_CIPHER_CTX_ctrl(e, EVP_CTRL_GET_RC2_KEY_BITS, 0, &i); | |
145 | if (i == 128) | |
146 | return (RC2_128_MAGIC); | |
147 | else if (i == 64) | |
148 | return (RC2_64_MAGIC); | |
149 | else if (i == 40) | |
150 | return (RC2_40_MAGIC); | |
151 | else | |
152 | return (0); | |
153 | } | |
dfeab068 | 154 | |
49528751 | 155 | static int rc2_magic_to_meth(int i) |
0f113f3e MC |
156 | { |
157 | if (i == RC2_128_MAGIC) | |
158 | return 128; | |
159 | else if (i == RC2_64_MAGIC) | |
160 | return 64; | |
161 | else if (i == RC2_40_MAGIC) | |
162 | return 40; | |
163 | else { | |
164 | EVPerr(EVP_F_RC2_MAGIC_TO_METH, EVP_R_UNSUPPORTED_KEY_SIZE); | |
165 | return (0); | |
166 | } | |
167 | } | |
dfeab068 | 168 | |
6b691a5c | 169 | static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) |
0f113f3e MC |
170 | { |
171 | long num = 0; | |
172 | int i = 0; | |
173 | int key_bits; | |
174 | unsigned int l; | |
175 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
176 | ||
177 | if (type != NULL) { | |
178 | l = EVP_CIPHER_CTX_iv_length(c); | |
179 | OPENSSL_assert(l <= sizeof(iv)); | |
180 | i = ASN1_TYPE_get_int_octetstring(type, &num, iv, l); | |
181 | if (i != (int)l) | |
182 | return (-1); | |
183 | key_bits = rc2_magic_to_meth((int)num); | |
184 | if (!key_bits) | |
185 | return (-1); | |
186 | if (i > 0 && !EVP_CipherInit_ex(c, NULL, NULL, NULL, iv, -1)) | |
187 | return -1; | |
188 | EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_RC2_KEY_BITS, key_bits, NULL); | |
189 | EVP_CIPHER_CTX_set_key_length(c, key_bits / 8); | |
190 | } | |
191 | return (i); | |
192 | } | |
dfeab068 | 193 | |
6b691a5c | 194 | static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) |
0f113f3e MC |
195 | { |
196 | long num; | |
197 | int i = 0, j; | |
198 | ||
199 | if (type != NULL) { | |
200 | num = rc2_meth_to_magic(c); | |
201 | j = EVP_CIPHER_CTX_iv_length(c); | |
936166af RL |
202 | i = ASN1_TYPE_set_int_octetstring(type, num, |
203 | (unsigned char *)EVP_CIPHER_CTX_original_iv(c), | |
204 | j); | |
0f113f3e MC |
205 | } |
206 | return (i); | |
207 | } | |
dfeab068 | 208 | |
49528751 | 209 | static int rc2_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) |
0f113f3e MC |
210 | { |
211 | switch (type) { | |
212 | case EVP_CTRL_INIT: | |
213 | data(c)->key_bits = EVP_CIPHER_CTX_key_length(c) * 8; | |
214 | return 1; | |
215 | ||
216 | case EVP_CTRL_GET_RC2_KEY_BITS: | |
217 | *(int *)ptr = data(c)->key_bits; | |
218 | return 1; | |
219 | ||
220 | case EVP_CTRL_SET_RC2_KEY_BITS: | |
221 | if (arg > 0) { | |
222 | data(c)->key_bits = arg; | |
223 | return 1; | |
224 | } | |
225 | return 0; | |
226 | # ifdef PBE_PRF_TEST | |
227 | case EVP_CTRL_PBE_PRF_NID: | |
228 | *(int *)ptr = NID_hmacWithMD5; | |
229 | return 1; | |
230 | # endif | |
231 | ||
232 | default: | |
233 | return -1; | |
234 | } | |
235 | } | |
49528751 | 236 | |
d02b48c6 | 237 | #endif |