Branch data Line data Source code
1 : : /* crypto/evp/e_rc2.c */
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 <stdio.h>
60 : : #include "cryptlib.h"
61 : :
62 : : #ifndef OPENSSL_NO_RC2
63 : :
64 : : #include <openssl/evp.h>
65 : : #include <openssl/objects.h>
66 : : #include "evp_locl.h"
67 : : #include <openssl/rc2.h>
68 : :
69 : : static int rc2_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
70 : : const unsigned char *iv,int enc);
71 : : static int rc2_meth_to_magic(EVP_CIPHER_CTX *ctx);
72 : : static int rc2_magic_to_meth(int i);
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);
75 : : static int rc2_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
76 : :
77 : : typedef struct
78 : : {
79 : : int key_bits; /* effective key bits */
80 : : RC2_KEY ks; /* key schedule */
81 : : } EVP_RC2_KEY;
82 : :
83 : : #define data(ctx) ((EVP_RC2_KEY *)(ctx)->cipher_data)
84 : :
85 [ - + ][ + - ]: 5465 : IMPLEMENT_BLOCK_CIPHER(rc2, ks, RC2, EVP_RC2_KEY, NID_rc2,
[ + - ][ + + ]
[ + - ][ + - ]
[ + + ][ - + ]
[ + - ]
86 : : 8,
87 : : RC2_KEY_LENGTH, 8, 64,
88 : : EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
89 : : rc2_init_key, NULL,
90 : : rc2_set_asn1_type_and_iv, rc2_get_asn1_type_and_iv,
91 : : rc2_ctrl)
92 : :
93 : : #define RC2_40_MAGIC 0xa0
94 : : #define RC2_64_MAGIC 0x78
95 : : #define RC2_128_MAGIC 0x3a
96 : :
97 : : static const EVP_CIPHER r2_64_cbc_cipher=
98 : : {
99 : : NID_rc2_64_cbc,
100 : : 8,8 /* 64 bit */,8,
101 : : EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
102 : : rc2_init_key,
103 : : rc2_cbc_cipher,
104 : : NULL,
105 : : sizeof(EVP_RC2_KEY),
106 : : rc2_set_asn1_type_and_iv,
107 : : rc2_get_asn1_type_and_iv,
108 : : rc2_ctrl,
109 : : NULL
110 : : };
111 : :
112 : : static const EVP_CIPHER r2_40_cbc_cipher=
113 : : {
114 : : NID_rc2_40_cbc,
115 : : 8,5 /* 40 bit */,8,
116 : : EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
117 : : rc2_init_key,
118 : : rc2_cbc_cipher,
119 : : NULL,
120 : : sizeof(EVP_RC2_KEY),
121 : : rc2_set_asn1_type_and_iv,
122 : : rc2_get_asn1_type_and_iv,
123 : : rc2_ctrl,
124 : : NULL
125 : : };
126 : :
127 : 726 : const EVP_CIPHER *EVP_rc2_64_cbc(void)
128 : : {
129 : 726 : return(&r2_64_cbc_cipher);
130 : : }
131 : :
132 : 1695 : const EVP_CIPHER *EVP_rc2_40_cbc(void)
133 : : {
134 : 1695 : return(&r2_40_cbc_cipher);
135 : : }
136 : :
137 : 76 : static int rc2_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
138 : : const unsigned char *iv, int enc)
139 : : {
140 : 76 : RC2_set_key(&data(ctx)->ks,EVP_CIPHER_CTX_key_length(ctx),
141 : 76 : key,data(ctx)->key_bits);
142 : 76 : return 1;
143 : : }
144 : :
145 : 2 : static int rc2_meth_to_magic(EVP_CIPHER_CTX *e)
146 : : {
147 : : int i;
148 : :
149 : 2 : EVP_CIPHER_CTX_ctrl(e, EVP_CTRL_GET_RC2_KEY_BITS, 0, &i);
150 [ - + ]: 2 : if (i == 128) return(RC2_128_MAGIC);
151 [ # # ]: 0 : else if (i == 64) return(RC2_64_MAGIC);
152 [ # # ]: 0 : else if (i == 40) return(RC2_40_MAGIC);
153 : 0 : else return(0);
154 : : }
155 : :
156 : 2 : static int rc2_magic_to_meth(int i)
157 : : {
158 [ - + ]: 2 : if (i == RC2_128_MAGIC) return 128;
159 [ # # ]: 0 : else if (i == RC2_64_MAGIC) return 64;
160 [ # # ]: 0 : else if (i == RC2_40_MAGIC) return 40;
161 : : else
162 : : {
163 : 0 : EVPerr(EVP_F_RC2_MAGIC_TO_METH,EVP_R_UNSUPPORTED_KEY_SIZE);
164 : 0 : return(0);
165 : : }
166 : : }
167 : :
168 : 2 : static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
169 : : {
170 : 2 : long num=0;
171 : 2 : int i=0;
172 : : int key_bits;
173 : : unsigned int l;
174 : : unsigned char iv[EVP_MAX_IV_LENGTH];
175 : :
176 [ + - ]: 2 : if (type != NULL)
177 : : {
178 : 2 : l=EVP_CIPHER_CTX_iv_length(c);
179 [ - + ]: 2 : OPENSSL_assert(l <= sizeof(iv));
180 : 2 : i=ASN1_TYPE_get_int_octetstring(type,&num,iv,l);
181 [ + - ]: 2 : if (i != (int)l)
182 : : return(-1);
183 : 2 : key_bits =rc2_magic_to_meth((int)num);
184 [ + - ]: 2 : if (!key_bits)
185 : : return(-1);
186 [ + - ][ + - ]: 2 : if(i > 0 && !EVP_CipherInit_ex(c, NULL, NULL, NULL, iv, -1))
187 : : return -1;
188 : 2 : EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_RC2_KEY_BITS, key_bits, NULL);
189 : 2 : EVP_CIPHER_CTX_set_key_length(c, key_bits / 8);
190 : : }
191 : 2 : return(i);
192 : : }
193 : :
194 : 2 : static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
195 : : {
196 : : long num;
197 : 2 : int i=0,j;
198 : :
199 [ + - ]: 2 : if (type != NULL)
200 : : {
201 : 2 : num=rc2_meth_to_magic(c);
202 : 2 : j=EVP_CIPHER_CTX_iv_length(c);
203 : 2 : i=ASN1_TYPE_set_int_octetstring(type,num,c->oiv,j);
204 : : }
205 : 2 : return(i);
206 : : }
207 : :
208 : 80 : static int rc2_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
209 : : {
210 [ + + + - ]: 80 : switch(type)
211 : : {
212 : : case EVP_CTRL_INIT:
213 : 76 : data(c)->key_bits = EVP_CIPHER_CTX_key_length(c) * 8;
214 : 76 : return 1;
215 : :
216 : : case EVP_CTRL_GET_RC2_KEY_BITS:
217 : 2 : *(int *)ptr = data(c)->key_bits;
218 : 2 : return 1;
219 : :
220 : : case EVP_CTRL_SET_RC2_KEY_BITS:
221 [ + - ]: 2 : if(arg > 0)
222 : : {
223 : 2 : data(c)->key_bits = arg;
224 : 2 : return 1;
225 : : }
226 : : return 0;
227 : : #ifdef PBE_PRF_TEST
228 : : case EVP_CTRL_PBE_PRF_NID:
229 : : *(int *)ptr = NID_hmacWithMD5;
230 : : return 1;
231 : : #endif
232 : :
233 : : default:
234 : : return -1;
235 : : }
236 : : }
237 : :
238 : : #endif
|
