1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
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 :-).
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 (tjh@cryptsoft.com)"
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
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.] */
57 #include <openssl/cipher.h>
58 #include <openssl/nid.h>
60 #include "../internal.h"
65 (l) = ((uint32_t)(*((c)++))); \
66 (l) |= ((uint32_t)(*((c)++))) << 8L; \
67 (l) |= ((uint32_t)(*((c)++))) << 16L; \
68 (l) |= ((uint32_t)(*((c)++))) << 24L; \
71 #define c2ln(c, l1, l2, n) \
77 (l2) = ((uint32_t)(*(--(c)))) << 24L; \
78 OPENSSL_FALLTHROUGH; \
80 (l2) |= ((uint32_t)(*(--(c)))) << 16L; \
81 OPENSSL_FALLTHROUGH; \
83 (l2) |= ((uint32_t)(*(--(c)))) << 8L; \
84 OPENSSL_FALLTHROUGH; \
86 (l2) |= ((uint32_t)(*(--(c)))); \
87 OPENSSL_FALLTHROUGH; \
89 (l1) = ((uint32_t)(*(--(c)))) << 24L; \
90 OPENSSL_FALLTHROUGH; \
92 (l1) |= ((uint32_t)(*(--(c)))) << 16L; \
93 OPENSSL_FALLTHROUGH; \
95 (l1) |= ((uint32_t)(*(--(c)))) << 8L; \
96 OPENSSL_FALLTHROUGH; \
98 (l1) |= ((uint32_t)(*(--(c)))); \
104 *((c)++) = (uint8_t)(((l)) & 0xff); \
105 *((c)++) = (uint8_t)(((l) >> 8L) & 0xff); \
106 *((c)++) = (uint8_t)(((l) >> 16L) & 0xff); \
107 *((c)++) = (uint8_t)(((l) >> 24L) & 0xff); \
110 #define l2cn(l1, l2, c, n) \
115 *(--(c)) = (uint8_t)(((l2) >> 24L) & 0xff); \
116 OPENSSL_FALLTHROUGH; \
118 *(--(c)) = (uint8_t)(((l2) >> 16L) & 0xff); \
119 OPENSSL_FALLTHROUGH; \
121 *(--(c)) = (uint8_t)(((l2) >> 8L) & 0xff); \
122 OPENSSL_FALLTHROUGH; \
124 *(--(c)) = (uint8_t)(((l2)) & 0xff); \
125 OPENSSL_FALLTHROUGH; \
127 *(--(c)) = (uint8_t)(((l1) >> 24L) & 0xff); \
128 OPENSSL_FALLTHROUGH; \
130 *(--(c)) = (uint8_t)(((l1) >> 16L) & 0xff); \
131 OPENSSL_FALLTHROUGH; \
133 *(--(c)) = (uint8_t)(((l1) >> 8L) & 0xff); \
134 OPENSSL_FALLTHROUGH; \
136 *(--(c)) = (uint8_t)(((l1)) & 0xff); \
140 typedef struct rc2_key_st { uint16_t data[64]; } RC2_KEY;
142 static void RC2_encrypt(uint32_t *d, RC2_KEY *key) {
145 uint16_t x0, x1, x2, x3, t;
149 x0 = (uint16_t)l & 0xffff;
150 x1 = (uint16_t)(l >> 16L);
152 x2 = (uint16_t)l & 0xffff;
153 x3 = (uint16_t)(l >> 16L);
158 p0 = p1 = &key->data[0];
160 t = (x0 + (x1 & ~x3) + (x2 & x3) + *(p0++)) & 0xffff;
161 x0 = (t << 1) | (t >> 15);
162 t = (x1 + (x2 & ~x0) + (x3 & x0) + *(p0++)) & 0xffff;
163 x1 = (t << 2) | (t >> 14);
164 t = (x2 + (x3 & ~x1) + (x0 & x1) + *(p0++)) & 0xffff;
165 x2 = (t << 3) | (t >> 13);
166 t = (x3 + (x0 & ~x2) + (x1 & x2) + *(p0++)) & 0xffff;
167 x3 = (t << 5) | (t >> 11);
173 i = (n == 2) ? 6 : 5;
182 d[0] = (uint32_t)(x0 & 0xffff) | ((uint32_t)(x1 & 0xffff) << 16L);
183 d[1] = (uint32_t)(x2 & 0xffff) | ((uint32_t)(x3 & 0xffff) << 16L);
186 static void RC2_decrypt(uint32_t *d, RC2_KEY *key) {
189 uint16_t x0, x1, x2, x3, t;
193 x0 = (uint16_t)l & 0xffff;
194 x1 = (uint16_t)(l >> 16L);
196 x2 = (uint16_t)l & 0xffff;
197 x3 = (uint16_t)(l >> 16L);
205 t = ((x3 << 11) | (x3 >> 5)) & 0xffff;
206 x3 = (t - (x0 & ~x2) - (x1 & x2) - *(p0--)) & 0xffff;
207 t = ((x2 << 13) | (x2 >> 3)) & 0xffff;
208 x2 = (t - (x3 & ~x1) - (x0 & x1) - *(p0--)) & 0xffff;
209 t = ((x1 << 14) | (x1 >> 2)) & 0xffff;
210 x1 = (t - (x2 & ~x0) - (x3 & x0) - *(p0--)) & 0xffff;
211 t = ((x0 << 15) | (x0 >> 1)) & 0xffff;
212 x0 = (t - (x1 & ~x3) - (x2 & x3) - *(p0--)) & 0xffff;
218 i = (n == 2) ? 6 : 5;
220 x3 = (x3 - p1[x2 & 0x3f]) & 0xffff;
221 x2 = (x2 - p1[x1 & 0x3f]) & 0xffff;
222 x1 = (x1 - p1[x0 & 0x3f]) & 0xffff;
223 x0 = (x0 - p1[x3 & 0x3f]) & 0xffff;
227 d[0] = (uint32_t)(x0 & 0xffff) | ((uint32_t)(x1 & 0xffff) << 16L);
228 d[1] = (uint32_t)(x2 & 0xffff) | ((uint32_t)(x3 & 0xffff) << 16L);
231 static void RC2_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t length,
232 RC2_KEY *ks, uint8_t *iv, int encrypt) {
234 uint32_t tout0, tout1, xor0, xor1;
242 for (l -= 8; l >= 0; l -= 8) {
249 RC2_encrypt(tin, ks);
256 c2ln(in, tin0, tin1, l + 8);
261 RC2_encrypt(tin, ks);
273 for (l -= 8; l >= 0; l -= 8) {
278 RC2_decrypt(tin, ks);
279 tout0 = tin[0] ^ xor0;
280 tout1 = tin[1] ^ xor1;
291 RC2_decrypt(tin, ks);
292 tout0 = tin[0] ^ xor0;
293 tout1 = tin[1] ^ xor1;
294 l2cn(tout0, tout1, out, l + 8);
304 static const uint8_t key_table[256] = {
305 0xd9, 0x78, 0xf9, 0xc4, 0x19, 0xdd, 0xb5, 0xed, 0x28, 0xe9, 0xfd, 0x79,
306 0x4a, 0xa0, 0xd8, 0x9d, 0xc6, 0x7e, 0x37, 0x83, 0x2b, 0x76, 0x53, 0x8e,
307 0x62, 0x4c, 0x64, 0x88, 0x44, 0x8b, 0xfb, 0xa2, 0x17, 0x9a, 0x59, 0xf5,
308 0x87, 0xb3, 0x4f, 0x13, 0x61, 0x45, 0x6d, 0x8d, 0x09, 0x81, 0x7d, 0x32,
309 0xbd, 0x8f, 0x40, 0xeb, 0x86, 0xb7, 0x7b, 0x0b, 0xf0, 0x95, 0x21, 0x22,
310 0x5c, 0x6b, 0x4e, 0x82, 0x54, 0xd6, 0x65, 0x93, 0xce, 0x60, 0xb2, 0x1c,
311 0x73, 0x56, 0xc0, 0x14, 0xa7, 0x8c, 0xf1, 0xdc, 0x12, 0x75, 0xca, 0x1f,
312 0x3b, 0xbe, 0xe4, 0xd1, 0x42, 0x3d, 0xd4, 0x30, 0xa3, 0x3c, 0xb6, 0x26,
313 0x6f, 0xbf, 0x0e, 0xda, 0x46, 0x69, 0x07, 0x57, 0x27, 0xf2, 0x1d, 0x9b,
314 0xbc, 0x94, 0x43, 0x03, 0xf8, 0x11, 0xc7, 0xf6, 0x90, 0xef, 0x3e, 0xe7,
315 0x06, 0xc3, 0xd5, 0x2f, 0xc8, 0x66, 0x1e, 0xd7, 0x08, 0xe8, 0xea, 0xde,
316 0x80, 0x52, 0xee, 0xf7, 0x84, 0xaa, 0x72, 0xac, 0x35, 0x4d, 0x6a, 0x2a,
317 0x96, 0x1a, 0xd2, 0x71, 0x5a, 0x15, 0x49, 0x74, 0x4b, 0x9f, 0xd0, 0x5e,
318 0x04, 0x18, 0xa4, 0xec, 0xc2, 0xe0, 0x41, 0x6e, 0x0f, 0x51, 0xcb, 0xcc,
319 0x24, 0x91, 0xaf, 0x50, 0xa1, 0xf4, 0x70, 0x39, 0x99, 0x7c, 0x3a, 0x85,
320 0x23, 0xb8, 0xb4, 0x7a, 0xfc, 0x02, 0x36, 0x5b, 0x25, 0x55, 0x97, 0x31,
321 0x2d, 0x5d, 0xfa, 0x98, 0xe3, 0x8a, 0x92, 0xae, 0x05, 0xdf, 0x29, 0x10,
322 0x67, 0x6c, 0xba, 0xc9, 0xd3, 0x00, 0xe6, 0xcf, 0xe1, 0x9e, 0xa8, 0x2c,
323 0x63, 0x16, 0x01, 0x3f, 0x58, 0xe2, 0x89, 0xa9, 0x0d, 0x38, 0x34, 0x1b,
324 0xab, 0x33, 0xff, 0xb0, 0xbb, 0x48, 0x0c, 0x5f, 0xb9, 0xb1, 0xcd, 0x2e,
325 0xc5, 0xf3, 0xdb, 0x47, 0xe5, 0xa5, 0x9c, 0x77, 0x0a, 0xa6, 0x20, 0x68,
326 0xfe, 0x7f, 0xc1, 0xad,
329 static void RC2_set_key(RC2_KEY *key, int len, const uint8_t *data, int bits) {
335 k = (uint8_t *)&key->data[0];
336 *k = 0; // for if there is a zero length key
348 for (i = 0; i < len; i++) {
355 for (i = len; i < 128; i++, j++) {
356 d = key_table[(k[j] + d) & 0xff];
360 // hmm.... key reduction to 'bits' bits
364 c = (0xff >> (-bits & 0x07));
366 d = key_table[k[i] & c];
369 d = key_table[k[i + j] ^ d];
373 // copy from bytes into uint16_t's
374 ki = &(key->data[63]);
375 for (i = 127; i >= 0; i -= 2) {
376 *(ki--) = ((k[i] << 8) | k[i - 1]) & 0xffff;
381 int key_bits; // effective key bits
382 RC2_KEY ks; // key schedule
385 static int rc2_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key,
386 const uint8_t *iv, int enc) {
387 EVP_RC2_KEY *rc2_key = (EVP_RC2_KEY *)ctx->cipher_data;
388 RC2_set_key(&rc2_key->ks, EVP_CIPHER_CTX_key_length(ctx), key,
393 static int rc2_cbc_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out, const uint8_t *in,
395 EVP_RC2_KEY *key = (EVP_RC2_KEY *)ctx->cipher_data;
396 static const size_t kChunkSize = 0x10000;
398 while (inl >= kChunkSize) {
399 RC2_cbc_encrypt(in, out, kChunkSize, &key->ks, ctx->iv, ctx->encrypt);
405 RC2_cbc_encrypt(in, out, inl, &key->ks, ctx->iv, ctx->encrypt);
410 static int rc2_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) {
411 EVP_RC2_KEY *key = (EVP_RC2_KEY *)ctx->cipher_data;
415 key->key_bits = EVP_CIPHER_CTX_key_length(ctx) * 8;
417 case EVP_CTRL_SET_RC2_KEY_BITS:
418 // Should be overridden by later call to |EVP_CTRL_INIT|, but
419 // people call it, so it may as well work.
428 static const EVP_CIPHER rc2_40_cbc = {
434 EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
442 const EVP_CIPHER *EVP_rc2_40_cbc(void) {
446 static const EVP_CIPHER rc2_cbc = {
452 EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
460 const EVP_CIPHER *EVP_rc2_cbc(void) {