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58964a49 | 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
2 | * All rights reserved. |
3 | * | |
4 | * This package is an SSL implementation written | |
5 | * by Eric Young (eay@cryptsoft.com). | |
6 | * The implementation was written so as to conform with Netscapes SSL. | |
0f113f3e | 7 | * |
d02b48c6 RE |
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 (tjh@cryptsoft.com). | |
0f113f3e | 14 | * |
d02b48c6 RE |
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. | |
0f113f3e | 21 | * |
d02b48c6 RE |
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 (eay@cryptsoft.com)" | |
34 | * The word 'cryptographic' can be left out if the rouines from the library | |
35 | * being used are not cryptographic related :-). | |
0f113f3e | 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
37 | * the apps directory (application code) you must include an acknowledgement: |
38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 39 | * |
d02b48c6 RE |
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. | |
0f113f3e | 51 | * |
d02b48c6 RE |
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 | ||
d02b48c6 | 58 | #include <stdio.h> |
b39fc560 | 59 | #include "internal/cryptlib.h" |
c7e7fc3e RL |
60 | |
61 | #ifndef OPENSSL_NO_RC2 | |
62 | ||
0f113f3e MC |
63 | # include <openssl/evp.h> |
64 | # include <openssl/objects.h> | |
6435f0f6 | 65 | # include "internal/evp_int.h" |
0f113f3e | 66 | # include <openssl/rc2.h> |
d02b48c6 | 67 | |
1921eaad | 68 | static int rc2_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
0f113f3e | 69 | const unsigned char *iv, int enc); |
49528751 DSH |
70 | static int rc2_meth_to_magic(EVP_CIPHER_CTX *ctx); |
71 | static int rc2_magic_to_meth(int i); | |
dfeab068 RE |
72 | static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type); |
73 | static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type); | |
49528751 | 74 | static int rc2_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); |
dfeab068 | 75 | |
0f113f3e MC |
76 | typedef struct { |
77 | int key_bits; /* effective key bits */ | |
78 | RC2_KEY ks; /* key schedule */ | |
79 | } EVP_RC2_KEY; | |
dbad1690 | 80 | |
6435f0f6 | 81 | # define data(ctx) EVP_C_DATA(EVP_RC2_KEY,ctx) |
dbad1690 BL |
82 | |
83 | IMPLEMENT_BLOCK_CIPHER(rc2, ks, RC2, EVP_RC2_KEY, NID_rc2, | |
0f113f3e MC |
84 | 8, |
85 | RC2_KEY_LENGTH, 8, 64, | |
86 | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, | |
87 | rc2_init_key, NULL, | |
88 | rc2_set_asn1_type_and_iv, rc2_get_asn1_type_and_iv, | |
89 | rc2_ctrl) | |
90 | # define RC2_40_MAGIC 0xa0 | |
91 | # define RC2_64_MAGIC 0x78 | |
92 | # define RC2_128_MAGIC 0x3a | |
93 | static const EVP_CIPHER r2_64_cbc_cipher = { | |
94 | NID_rc2_64_cbc, | |
95 | 8, 8 /* 64 bit */ , 8, | |
96 | EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, | |
97 | rc2_init_key, | |
98 | rc2_cbc_cipher, | |
99 | NULL, | |
100 | sizeof(EVP_RC2_KEY), | |
101 | rc2_set_asn1_type_and_iv, | |
102 | rc2_get_asn1_type_and_iv, | |
103 | rc2_ctrl, | |
104 | NULL | |
105 | }; | |
106 | ||
107 | static const EVP_CIPHER r2_40_cbc_cipher = { | |
108 | NID_rc2_40_cbc, | |
109 | 8, 5 /* 40 bit */ , 8, | |
110 | EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, | |
111 | rc2_init_key, | |
112 | rc2_cbc_cipher, | |
113 | NULL, | |
114 | sizeof(EVP_RC2_KEY), | |
115 | rc2_set_asn1_type_and_iv, | |
116 | rc2_get_asn1_type_and_iv, | |
117 | rc2_ctrl, | |
118 | NULL | |
119 | }; | |
d02b48c6 | 120 | |
13588350 | 121 | const EVP_CIPHER *EVP_rc2_64_cbc(void) |
0f113f3e MC |
122 | { |
123 | return (&r2_64_cbc_cipher); | |
124 | } | |
dfeab068 | 125 | |
13588350 | 126 | const EVP_CIPHER *EVP_rc2_40_cbc(void) |
0f113f3e MC |
127 | { |
128 | return (&r2_40_cbc_cipher); | |
129 | } | |
130 | ||
1921eaad | 131 | static int rc2_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
0f113f3e MC |
132 | const unsigned char *iv, int enc) |
133 | { | |
134 | RC2_set_key(&data(ctx)->ks, EVP_CIPHER_CTX_key_length(ctx), | |
135 | key, data(ctx)->key_bits); | |
136 | return 1; | |
137 | } | |
d02b48c6 | 138 | |
49528751 | 139 | static int rc2_meth_to_magic(EVP_CIPHER_CTX *e) |
0f113f3e MC |
140 | { |
141 | int i; | |
142 | ||
143 | EVP_CIPHER_CTX_ctrl(e, EVP_CTRL_GET_RC2_KEY_BITS, 0, &i); | |
144 | if (i == 128) | |
145 | return (RC2_128_MAGIC); | |
146 | else if (i == 64) | |
147 | return (RC2_64_MAGIC); | |
148 | else if (i == 40) | |
149 | return (RC2_40_MAGIC); | |
150 | else | |
151 | return (0); | |
152 | } | |
dfeab068 | 153 | |
49528751 | 154 | static int rc2_magic_to_meth(int i) |
0f113f3e MC |
155 | { |
156 | if (i == RC2_128_MAGIC) | |
157 | return 128; | |
158 | else if (i == RC2_64_MAGIC) | |
159 | return 64; | |
160 | else if (i == RC2_40_MAGIC) | |
161 | return 40; | |
162 | else { | |
163 | EVPerr(EVP_F_RC2_MAGIC_TO_METH, EVP_R_UNSUPPORTED_KEY_SIZE); | |
164 | return (0); | |
165 | } | |
166 | } | |
dfeab068 | 167 | |
6b691a5c | 168 | static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) |
0f113f3e MC |
169 | { |
170 | long num = 0; | |
171 | int i = 0; | |
172 | int key_bits; | |
173 | unsigned int l; | |
174 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
175 | ||
176 | if (type != NULL) { | |
177 | l = EVP_CIPHER_CTX_iv_length(c); | |
178 | OPENSSL_assert(l <= sizeof(iv)); | |
179 | i = ASN1_TYPE_get_int_octetstring(type, &num, iv, l); | |
180 | if (i != (int)l) | |
181 | return (-1); | |
182 | key_bits = rc2_magic_to_meth((int)num); | |
183 | if (!key_bits) | |
184 | return (-1); | |
185 | if (i > 0 && !EVP_CipherInit_ex(c, NULL, NULL, NULL, iv, -1)) | |
186 | return -1; | |
187 | EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_RC2_KEY_BITS, key_bits, NULL); | |
188 | EVP_CIPHER_CTX_set_key_length(c, key_bits / 8); | |
189 | } | |
190 | return (i); | |
191 | } | |
dfeab068 | 192 | |
6b691a5c | 193 | static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) |
0f113f3e MC |
194 | { |
195 | long num; | |
196 | int i = 0, j; | |
197 | ||
198 | if (type != NULL) { | |
199 | num = rc2_meth_to_magic(c); | |
200 | j = EVP_CIPHER_CTX_iv_length(c); | |
936166af RL |
201 | i = ASN1_TYPE_set_int_octetstring(type, num, |
202 | (unsigned char *)EVP_CIPHER_CTX_original_iv(c), | |
203 | j); | |
0f113f3e MC |
204 | } |
205 | return (i); | |
206 | } | |
dfeab068 | 207 | |
49528751 | 208 | static int rc2_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) |
0f113f3e MC |
209 | { |
210 | switch (type) { | |
211 | case EVP_CTRL_INIT: | |
212 | data(c)->key_bits = EVP_CIPHER_CTX_key_length(c) * 8; | |
213 | return 1; | |
214 | ||
215 | case EVP_CTRL_GET_RC2_KEY_BITS: | |
216 | *(int *)ptr = data(c)->key_bits; | |
217 | return 1; | |
218 | ||
219 | case EVP_CTRL_SET_RC2_KEY_BITS: | |
220 | if (arg > 0) { | |
221 | data(c)->key_bits = arg; | |
222 | return 1; | |
223 | } | |
224 | return 0; | |
225 | # ifdef PBE_PRF_TEST | |
226 | case EVP_CTRL_PBE_PRF_NID: | |
227 | *(int *)ptr = NID_hmacWithMD5; | |
228 | return 1; | |
229 | # endif | |
230 | ||
231 | default: | |
232 | return -1; | |
233 | } | |
234 | } | |
49528751 | 235 | |
d02b48c6 | 236 | #endif |