Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 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. |
| 7 | * |
| 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). |
| 14 | * |
| 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. |
| 21 | * |
| 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 :-). |
| 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)" |
| 39 | * |
| 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. |
| 51 | * |
| 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 | #include <openssl/cipher.h> |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 58 | #include <openssl/nid.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 59 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 60 | |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 61 | #define c2l(c, l) \ |
| 62 | do { \ |
| 63 | (l) = ((uint32_t)(*((c)++))); \ |
| 64 | (l) |= ((uint32_t)(*((c)++))) << 8L; \ |
| 65 | (l) |= ((uint32_t)(*((c)++))) << 16L; \ |
| 66 | (l) |= ((uint32_t)(*((c)++))) << 24L; \ |
| 67 | } while (0) |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 68 | |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 69 | #define c2ln(c, l1, l2, n) \ |
| 70 | do { \ |
| 71 | (c) += (n); \ |
| 72 | (l1) = (l2) = 0; \ |
| 73 | switch (n) { \ |
| 74 | case 8: \ |
| 75 | (l2) = ((uint32_t)(*(--(c)))) << 24L; \ |
| 76 | case 7: \ |
| 77 | (l2) |= ((uint32_t)(*(--(c)))) << 16L; \ |
| 78 | case 6: \ |
| 79 | (l2) |= ((uint32_t)(*(--(c)))) << 8L; \ |
| 80 | case 5: \ |
| 81 | (l2) |= ((uint32_t)(*(--(c)))); \ |
| 82 | case 4: \ |
| 83 | (l1) = ((uint32_t)(*(--(c)))) << 24L; \ |
| 84 | case 3: \ |
| 85 | (l1) |= ((uint32_t)(*(--(c)))) << 16L; \ |
| 86 | case 2: \ |
| 87 | (l1) |= ((uint32_t)(*(--(c)))) << 8L; \ |
| 88 | case 1: \ |
| 89 | (l1) |= ((uint32_t)(*(--(c)))); \ |
| 90 | } \ |
| 91 | } while (0) |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 92 | |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 93 | #define l2c(l, c) \ |
| 94 | do { \ |
| 95 | *((c)++) = (uint8_t)(((l)) & 0xff); \ |
| 96 | *((c)++) = (uint8_t)(((l) >> 8L) & 0xff); \ |
| 97 | *((c)++) = (uint8_t)(((l) >> 16L) & 0xff); \ |
| 98 | *((c)++) = (uint8_t)(((l) >> 24L) & 0xff); \ |
| 99 | } while (0) |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 100 | |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 101 | #define l2cn(l1, l2, c, n) \ |
| 102 | do { \ |
| 103 | (c) += (n); \ |
| 104 | switch (n) { \ |
| 105 | case 8: \ |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 106 | *(--(c)) = (uint8_t)(((l2) >> 24L) & 0xff); \ |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 107 | case 7: \ |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 108 | *(--(c)) = (uint8_t)(((l2) >> 16L) & 0xff); \ |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 109 | case 6: \ |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 110 | *(--(c)) = (uint8_t)(((l2) >> 8L) & 0xff); \ |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 111 | case 5: \ |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 112 | *(--(c)) = (uint8_t)(((l2)) & 0xff); \ |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 113 | case 4: \ |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 114 | *(--(c)) = (uint8_t)(((l1) >> 24L) & 0xff); \ |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 115 | case 3: \ |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 116 | *(--(c)) = (uint8_t)(((l1) >> 16L) & 0xff); \ |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 117 | case 2: \ |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 118 | *(--(c)) = (uint8_t)(((l1) >> 8L) & 0xff); \ |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 119 | case 1: \ |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 120 | *(--(c)) = (uint8_t)(((l1)) & 0xff); \ |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 121 | } \ |
| 122 | } while (0) |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 123 | |
| 124 | typedef struct rc2_key_st { uint16_t data[64]; } RC2_KEY; |
| 125 | |
| 126 | static void RC2_encrypt(uint32_t *d, RC2_KEY *key) { |
| 127 | int i, n; |
| 128 | uint16_t *p0, *p1; |
| 129 | uint16_t x0, x1, x2, x3, t; |
| 130 | uint32_t l; |
| 131 | |
| 132 | l = d[0]; |
| 133 | x0 = (uint16_t)l & 0xffff; |
| 134 | x1 = (uint16_t)(l >> 16L); |
| 135 | l = d[1]; |
| 136 | x2 = (uint16_t)l & 0xffff; |
| 137 | x3 = (uint16_t)(l >> 16L); |
| 138 | |
| 139 | n = 3; |
| 140 | i = 5; |
| 141 | |
| 142 | p0 = p1 = &key->data[0]; |
| 143 | for (;;) { |
| 144 | t = (x0 + (x1 & ~x3) + (x2 & x3) + *(p0++)) & 0xffff; |
| 145 | x0 = (t << 1) | (t >> 15); |
| 146 | t = (x1 + (x2 & ~x0) + (x3 & x0) + *(p0++)) & 0xffff; |
| 147 | x1 = (t << 2) | (t >> 14); |
| 148 | t = (x2 + (x3 & ~x1) + (x0 & x1) + *(p0++)) & 0xffff; |
| 149 | x2 = (t << 3) | (t >> 13); |
| 150 | t = (x3 + (x0 & ~x2) + (x1 & x2) + *(p0++)) & 0xffff; |
| 151 | x3 = (t << 5) | (t >> 11); |
| 152 | |
| 153 | if (--i == 0) { |
| 154 | if (--n == 0) { |
| 155 | break; |
| 156 | } |
| 157 | i = (n == 2) ? 6 : 5; |
| 158 | |
| 159 | x0 += p1[x3 & 0x3f]; |
| 160 | x1 += p1[x0 & 0x3f]; |
| 161 | x2 += p1[x1 & 0x3f]; |
| 162 | x3 += p1[x2 & 0x3f]; |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | d[0] = (uint32_t)(x0 & 0xffff) | ((uint32_t)(x1 & 0xffff) << 16L); |
| 167 | d[1] = (uint32_t)(x2 & 0xffff) | ((uint32_t)(x3 & 0xffff) << 16L); |
| 168 | } |
| 169 | |
| 170 | static void RC2_decrypt(uint32_t *d, RC2_KEY *key) { |
| 171 | int i, n; |
| 172 | uint16_t *p0, *p1; |
| 173 | uint16_t x0, x1, x2, x3, t; |
| 174 | uint32_t l; |
| 175 | |
| 176 | l = d[0]; |
| 177 | x0 = (uint16_t)l & 0xffff; |
| 178 | x1 = (uint16_t)(l >> 16L); |
| 179 | l = d[1]; |
| 180 | x2 = (uint16_t)l & 0xffff; |
| 181 | x3 = (uint16_t)(l >> 16L); |
| 182 | |
| 183 | n = 3; |
| 184 | i = 5; |
| 185 | |
| 186 | p0 = &key->data[63]; |
| 187 | p1 = &key->data[0]; |
| 188 | for (;;) { |
| 189 | t = ((x3 << 11) | (x3 >> 5)) & 0xffff; |
| 190 | x3 = (t - (x0 & ~x2) - (x1 & x2) - *(p0--)) & 0xffff; |
| 191 | t = ((x2 << 13) | (x2 >> 3)) & 0xffff; |
| 192 | x2 = (t - (x3 & ~x1) - (x0 & x1) - *(p0--)) & 0xffff; |
| 193 | t = ((x1 << 14) | (x1 >> 2)) & 0xffff; |
| 194 | x1 = (t - (x2 & ~x0) - (x3 & x0) - *(p0--)) & 0xffff; |
| 195 | t = ((x0 << 15) | (x0 >> 1)) & 0xffff; |
| 196 | x0 = (t - (x1 & ~x3) - (x2 & x3) - *(p0--)) & 0xffff; |
| 197 | |
| 198 | if (--i == 0) { |
| 199 | if (--n == 0) { |
| 200 | break; |
| 201 | } |
| 202 | i = (n == 2) ? 6 : 5; |
| 203 | |
| 204 | x3 = (x3 - p1[x2 & 0x3f]) & 0xffff; |
| 205 | x2 = (x2 - p1[x1 & 0x3f]) & 0xffff; |
| 206 | x1 = (x1 - p1[x0 & 0x3f]) & 0xffff; |
| 207 | x0 = (x0 - p1[x3 & 0x3f]) & 0xffff; |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | d[0] = (uint32_t)(x0 & 0xffff) | ((uint32_t)(x1 & 0xffff) << 16L); |
| 212 | d[1] = (uint32_t)(x2 & 0xffff) | ((uint32_t)(x3 & 0xffff) << 16L); |
| 213 | } |
| 214 | |
| 215 | static void RC2_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t length, |
| 216 | RC2_KEY *ks, uint8_t *iv, int encrypt) { |
| 217 | uint32_t tin0, tin1; |
| 218 | uint32_t tout0, tout1, xor0, xor1; |
| 219 | long l = length; |
| 220 | uint32_t tin[2]; |
| 221 | |
| 222 | if (encrypt) { |
| 223 | c2l(iv, tout0); |
| 224 | c2l(iv, tout1); |
| 225 | iv -= 8; |
| 226 | for (l -= 8; l >= 0; l -= 8) { |
| 227 | c2l(in, tin0); |
| 228 | c2l(in, tin1); |
| 229 | tin0 ^= tout0; |
| 230 | tin1 ^= tout1; |
| 231 | tin[0] = tin0; |
| 232 | tin[1] = tin1; |
| 233 | RC2_encrypt(tin, ks); |
| 234 | tout0 = tin[0]; |
| 235 | l2c(tout0, out); |
| 236 | tout1 = tin[1]; |
| 237 | l2c(tout1, out); |
| 238 | } |
| 239 | if (l != -8) { |
| 240 | c2ln(in, tin0, tin1, l + 8); |
| 241 | tin0 ^= tout0; |
| 242 | tin1 ^= tout1; |
| 243 | tin[0] = tin0; |
| 244 | tin[1] = tin1; |
| 245 | RC2_encrypt(tin, ks); |
| 246 | tout0 = tin[0]; |
| 247 | l2c(tout0, out); |
| 248 | tout1 = tin[1]; |
| 249 | l2c(tout1, out); |
| 250 | } |
| 251 | l2c(tout0, iv); |
| 252 | l2c(tout1, iv); |
| 253 | } else { |
| 254 | c2l(iv, xor0); |
| 255 | c2l(iv, xor1); |
| 256 | iv -= 8; |
| 257 | for (l -= 8; l >= 0; l -= 8) { |
| 258 | c2l(in, tin0); |
| 259 | tin[0] = tin0; |
| 260 | c2l(in, tin1); |
| 261 | tin[1] = tin1; |
| 262 | RC2_decrypt(tin, ks); |
| 263 | tout0 = tin[0] ^ xor0; |
| 264 | tout1 = tin[1] ^ xor1; |
| 265 | l2c(tout0, out); |
| 266 | l2c(tout1, out); |
| 267 | xor0 = tin0; |
| 268 | xor1 = tin1; |
| 269 | } |
| 270 | if (l != -8) { |
| 271 | c2l(in, tin0); |
| 272 | tin[0] = tin0; |
| 273 | c2l(in, tin1); |
| 274 | tin[1] = tin1; |
| 275 | RC2_decrypt(tin, ks); |
| 276 | tout0 = tin[0] ^ xor0; |
| 277 | tout1 = tin[1] ^ xor1; |
| 278 | l2cn(tout0, tout1, out, l + 8); |
| 279 | xor0 = tin0; |
| 280 | xor1 = tin1; |
| 281 | } |
| 282 | l2c(xor0, iv); |
| 283 | l2c(xor1, iv); |
| 284 | } |
| 285 | tin[0] = tin[1] = 0; |
| 286 | } |
| 287 | |
| 288 | static const uint8_t key_table[256] = { |
| 289 | 0xd9, 0x78, 0xf9, 0xc4, 0x19, 0xdd, 0xb5, 0xed, 0x28, 0xe9, 0xfd, 0x79, |
| 290 | 0x4a, 0xa0, 0xd8, 0x9d, 0xc6, 0x7e, 0x37, 0x83, 0x2b, 0x76, 0x53, 0x8e, |
| 291 | 0x62, 0x4c, 0x64, 0x88, 0x44, 0x8b, 0xfb, 0xa2, 0x17, 0x9a, 0x59, 0xf5, |
| 292 | 0x87, 0xb3, 0x4f, 0x13, 0x61, 0x45, 0x6d, 0x8d, 0x09, 0x81, 0x7d, 0x32, |
| 293 | 0xbd, 0x8f, 0x40, 0xeb, 0x86, 0xb7, 0x7b, 0x0b, 0xf0, 0x95, 0x21, 0x22, |
| 294 | 0x5c, 0x6b, 0x4e, 0x82, 0x54, 0xd6, 0x65, 0x93, 0xce, 0x60, 0xb2, 0x1c, |
| 295 | 0x73, 0x56, 0xc0, 0x14, 0xa7, 0x8c, 0xf1, 0xdc, 0x12, 0x75, 0xca, 0x1f, |
| 296 | 0x3b, 0xbe, 0xe4, 0xd1, 0x42, 0x3d, 0xd4, 0x30, 0xa3, 0x3c, 0xb6, 0x26, |
| 297 | 0x6f, 0xbf, 0x0e, 0xda, 0x46, 0x69, 0x07, 0x57, 0x27, 0xf2, 0x1d, 0x9b, |
| 298 | 0xbc, 0x94, 0x43, 0x03, 0xf8, 0x11, 0xc7, 0xf6, 0x90, 0xef, 0x3e, 0xe7, |
| 299 | 0x06, 0xc3, 0xd5, 0x2f, 0xc8, 0x66, 0x1e, 0xd7, 0x08, 0xe8, 0xea, 0xde, |
| 300 | 0x80, 0x52, 0xee, 0xf7, 0x84, 0xaa, 0x72, 0xac, 0x35, 0x4d, 0x6a, 0x2a, |
| 301 | 0x96, 0x1a, 0xd2, 0x71, 0x5a, 0x15, 0x49, 0x74, 0x4b, 0x9f, 0xd0, 0x5e, |
| 302 | 0x04, 0x18, 0xa4, 0xec, 0xc2, 0xe0, 0x41, 0x6e, 0x0f, 0x51, 0xcb, 0xcc, |
| 303 | 0x24, 0x91, 0xaf, 0x50, 0xa1, 0xf4, 0x70, 0x39, 0x99, 0x7c, 0x3a, 0x85, |
| 304 | 0x23, 0xb8, 0xb4, 0x7a, 0xfc, 0x02, 0x36, 0x5b, 0x25, 0x55, 0x97, 0x31, |
| 305 | 0x2d, 0x5d, 0xfa, 0x98, 0xe3, 0x8a, 0x92, 0xae, 0x05, 0xdf, 0x29, 0x10, |
| 306 | 0x67, 0x6c, 0xba, 0xc9, 0xd3, 0x00, 0xe6, 0xcf, 0xe1, 0x9e, 0xa8, 0x2c, |
| 307 | 0x63, 0x16, 0x01, 0x3f, 0x58, 0xe2, 0x89, 0xa9, 0x0d, 0x38, 0x34, 0x1b, |
| 308 | 0xab, 0x33, 0xff, 0xb0, 0xbb, 0x48, 0x0c, 0x5f, 0xb9, 0xb1, 0xcd, 0x2e, |
| 309 | 0xc5, 0xf3, 0xdb, 0x47, 0xe5, 0xa5, 0x9c, 0x77, 0x0a, 0xa6, 0x20, 0x68, |
| 310 | 0xfe, 0x7f, 0xc1, 0xad, |
| 311 | }; |
| 312 | |
| 313 | static void RC2_set_key(RC2_KEY *key, int len, const uint8_t *data, int bits) { |
| 314 | int i, j; |
| 315 | uint8_t *k; |
| 316 | uint16_t *ki; |
| 317 | unsigned int c, d; |
| 318 | |
| 319 | k = (uint8_t *)&key->data[0]; |
| 320 | *k = 0; /* for if there is a zero length key */ |
| 321 | |
| 322 | if (len > 128) { |
| 323 | len = 128; |
| 324 | } |
| 325 | if (bits <= 0) { |
| 326 | bits = 1024; |
| 327 | } |
| 328 | if (bits > 1024) { |
| 329 | bits = 1024; |
| 330 | } |
| 331 | |
| 332 | for (i = 0; i < len; i++) { |
| 333 | k[i] = data[i]; |
| 334 | } |
| 335 | |
| 336 | /* expand table */ |
| 337 | d = k[len - 1]; |
| 338 | j = 0; |
| 339 | for (i = len; i < 128; i++, j++) { |
| 340 | d = key_table[(k[j] + d) & 0xff]; |
| 341 | k[i] = d; |
| 342 | } |
| 343 | |
| 344 | /* hmm.... key reduction to 'bits' bits */ |
| 345 | |
| 346 | j = (bits + 7) >> 3; |
| 347 | i = 128 - j; |
| 348 | c = (0xff >> (-bits & 0x07)); |
| 349 | |
| 350 | d = key_table[k[i] & c]; |
| 351 | k[i] = d; |
| 352 | while (i--) { |
| 353 | d = key_table[k[i + j] ^ d]; |
| 354 | k[i] = d; |
| 355 | } |
| 356 | |
| 357 | /* copy from bytes into uint16_t's */ |
| 358 | ki = &(key->data[63]); |
| 359 | for (i = 127; i >= 0; i -= 2) { |
| 360 | *(ki--) = ((k[i] << 8) | k[i - 1]) & 0xffff; |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | typedef struct { |
| 365 | int key_bits; /* effective key bits */ |
| 366 | RC2_KEY ks; /* key schedule */ |
| 367 | } EVP_RC2_KEY; |
| 368 | |
| 369 | static int rc2_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key, |
| 370 | const uint8_t *iv, int enc) { |
| 371 | EVP_RC2_KEY *rc2_key = (EVP_RC2_KEY *)ctx->cipher_data; |
| 372 | RC2_set_key(&rc2_key->ks, EVP_CIPHER_CTX_key_length(ctx), key, |
| 373 | rc2_key->key_bits); |
| 374 | return 1; |
| 375 | } |
| 376 | |
| 377 | static int rc2_cbc_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out, const uint8_t *in, |
| 378 | size_t inl) { |
| 379 | EVP_RC2_KEY *key = (EVP_RC2_KEY *)ctx->cipher_data; |
| 380 | static const size_t kChunkSize = 0x10000; |
| 381 | |
| 382 | while (inl >= kChunkSize) { |
| 383 | RC2_cbc_encrypt(in, out, kChunkSize, &key->ks, ctx->iv, ctx->encrypt); |
| 384 | inl -= kChunkSize; |
| 385 | in += kChunkSize; |
| 386 | out += kChunkSize; |
| 387 | } |
| 388 | if (inl) { |
| 389 | RC2_cbc_encrypt(in, out, inl, &key->ks, ctx->iv, ctx->encrypt); |
| 390 | } |
| 391 | return 1; |
| 392 | } |
| 393 | |
| 394 | static int rc2_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) { |
| 395 | EVP_RC2_KEY *key = (EVP_RC2_KEY *)ctx->cipher_data; |
| 396 | |
| 397 | switch (type) { |
| 398 | case EVP_CTRL_INIT: |
| 399 | key->key_bits = EVP_CIPHER_CTX_key_length(ctx) * 8; |
| 400 | return 1; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 401 | case EVP_CTRL_SET_RC2_KEY_BITS: |
| 402 | /* Should be overridden by later call to |EVP_CTRL_INIT|, but |
| 403 | * people call it, so it may as well work. */ |
| 404 | key->key_bits = arg; |
| 405 | return 1; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 406 | |
| 407 | default: |
| 408 | return -1; |
| 409 | } |
| 410 | } |
| 411 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 412 | static const EVP_CIPHER rc2_40_cbc = { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 413 | NID_rc2_40_cbc, |
| 414 | 8 /* block size */, |
| 415 | 5 /* 40 bit */, |
| 416 | 8 /* iv len */, |
| 417 | sizeof(EVP_RC2_KEY), |
| 418 | EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, |
| 419 | NULL /* app_data */, |
| 420 | rc2_init_key, |
| 421 | rc2_cbc_cipher, |
| 422 | NULL, |
| 423 | rc2_ctrl, |
| 424 | }; |
| 425 | |
| 426 | const EVP_CIPHER *EVP_rc2_40_cbc(void) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 427 | return &rc2_40_cbc; |
| 428 | } |
| 429 | |
| 430 | static const EVP_CIPHER rc2_cbc = { |
| 431 | NID_rc2_cbc, |
| 432 | 8 /* block size */, |
| 433 | 16 /* 128 bit */, |
| 434 | 8 /* iv len */, |
| 435 | sizeof(EVP_RC2_KEY), |
| 436 | EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, |
| 437 | NULL /* app_data */, |
| 438 | rc2_init_key, |
| 439 | rc2_cbc_cipher, |
| 440 | NULL, |
| 441 | rc2_ctrl, |
| 442 | }; |
| 443 | |
| 444 | const EVP_CIPHER *EVP_rc2_cbc(void) { |
| 445 | return &rc2_cbc; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 446 | } |