diff options
Diffstat (limited to 'third_party/bearssl/src/des_tab.c')
| -rw-r--r-- | third_party/bearssl/src/des_tab.c | 310 |
1 files changed, 310 insertions, 0 deletions
diff --git a/third_party/bearssl/src/des_tab.c b/third_party/bearssl/src/des_tab.c new file mode 100644 index 0000000..3f8e4f9 --- /dev/null +++ b/third_party/bearssl/src/des_tab.c @@ -0,0 +1,310 @@ +/* + * Copyright (c) 2016 Thomas Pornin <[email protected]> + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "inner.h" + +/* + * PC2left[x] tells where bit x goes when applying PC-2. 'x' is a bit + * position in the left rotated key word. Both position are in normal + * order (rightmost bit is 0). + */ +static const unsigned char PC2left[] = { + 16, 3, 7, 24, 20, 11, 24, + 13, 2, 10, 24, 22, 5, 15, + 23, 1, 9, 21, 12, 24, 6, + 4, 14, 18, 8, 17, 0, 19 +}; + +/* + * Similar to PC2left[x], for the right rotated key word. + */ +static const unsigned char PC2right[] = { + 8, 18, 24, 6, 22, 15, 3, + 10, 12, 19, 5, 14, 11, 24, + 4, 23, 16, 9, 24, 20, 2, + 24, 7, 13, 0, 21, 17, 1 +}; + +/* + * S-boxes and PC-1 merged. + */ +static const uint32_t S1[] = { + 0x00808200, 0x00000000, 0x00008000, 0x00808202, + 0x00808002, 0x00008202, 0x00000002, 0x00008000, + 0x00000200, 0x00808200, 0x00808202, 0x00000200, + 0x00800202, 0x00808002, 0x00800000, 0x00000002, + 0x00000202, 0x00800200, 0x00800200, 0x00008200, + 0x00008200, 0x00808000, 0x00808000, 0x00800202, + 0x00008002, 0x00800002, 0x00800002, 0x00008002, + 0x00000000, 0x00000202, 0x00008202, 0x00800000, + 0x00008000, 0x00808202, 0x00000002, 0x00808000, + 0x00808200, 0x00800000, 0x00800000, 0x00000200, + 0x00808002, 0x00008000, 0x00008200, 0x00800002, + 0x00000200, 0x00000002, 0x00800202, 0x00008202, + 0x00808202, 0x00008002, 0x00808000, 0x00800202, + 0x00800002, 0x00000202, 0x00008202, 0x00808200, + 0x00000202, 0x00800200, 0x00800200, 0x00000000, + 0x00008002, 0x00008200, 0x00000000, 0x00808002 +}; + +static const uint32_t S2[] = { + 0x40084010, 0x40004000, 0x00004000, 0x00084010, + 0x00080000, 0x00000010, 0x40080010, 0x40004010, + 0x40000010, 0x40084010, 0x40084000, 0x40000000, + 0x40004000, 0x00080000, 0x00000010, 0x40080010, + 0x00084000, 0x00080010, 0x40004010, 0x00000000, + 0x40000000, 0x00004000, 0x00084010, 0x40080000, + 0x00080010, 0x40000010, 0x00000000, 0x00084000, + 0x00004010, 0x40084000, 0x40080000, 0x00004010, + 0x00000000, 0x00084010, 0x40080010, 0x00080000, + 0x40004010, 0x40080000, 0x40084000, 0x00004000, + 0x40080000, 0x40004000, 0x00000010, 0x40084010, + 0x00084010, 0x00000010, 0x00004000, 0x40000000, + 0x00004010, 0x40084000, 0x00080000, 0x40000010, + 0x00080010, 0x40004010, 0x40000010, 0x00080010, + 0x00084000, 0x00000000, 0x40004000, 0x00004010, + 0x40000000, 0x40080010, 0x40084010, 0x00084000 +}; + +static const uint32_t S3[] = { + 0x00000104, 0x04010100, 0x00000000, 0x04010004, + 0x04000100, 0x00000000, 0x00010104, 0x04000100, + 0x00010004, 0x04000004, 0x04000004, 0x00010000, + 0x04010104, 0x00010004, 0x04010000, 0x00000104, + 0x04000000, 0x00000004, 0x04010100, 0x00000100, + 0x00010100, 0x04010000, 0x04010004, 0x00010104, + 0x04000104, 0x00010100, 0x00010000, 0x04000104, + 0x00000004, 0x04010104, 0x00000100, 0x04000000, + 0x04010100, 0x04000000, 0x00010004, 0x00000104, + 0x00010000, 0x04010100, 0x04000100, 0x00000000, + 0x00000100, 0x00010004, 0x04010104, 0x04000100, + 0x04000004, 0x00000100, 0x00000000, 0x04010004, + 0x04000104, 0x00010000, 0x04000000, 0x04010104, + 0x00000004, 0x00010104, 0x00010100, 0x04000004, + 0x04010000, 0x04000104, 0x00000104, 0x04010000, + 0x00010104, 0x00000004, 0x04010004, 0x00010100 +}; + +static const uint32_t S4[] = { + 0x80401000, 0x80001040, 0x80001040, 0x00000040, + 0x00401040, 0x80400040, 0x80400000, 0x80001000, + 0x00000000, 0x00401000, 0x00401000, 0x80401040, + 0x80000040, 0x00000000, 0x00400040, 0x80400000, + 0x80000000, 0x00001000, 0x00400000, 0x80401000, + 0x00000040, 0x00400000, 0x80001000, 0x00001040, + 0x80400040, 0x80000000, 0x00001040, 0x00400040, + 0x00001000, 0x00401040, 0x80401040, 0x80000040, + 0x00400040, 0x80400000, 0x00401000, 0x80401040, + 0x80000040, 0x00000000, 0x00000000, 0x00401000, + 0x00001040, 0x00400040, 0x80400040, 0x80000000, + 0x80401000, 0x80001040, 0x80001040, 0x00000040, + 0x80401040, 0x80000040, 0x80000000, 0x00001000, + 0x80400000, 0x80001000, 0x00401040, 0x80400040, + 0x80001000, 0x00001040, 0x00400000, 0x80401000, + 0x00000040, 0x00400000, 0x00001000, 0x00401040 +}; + +static const uint32_t S5[] = { + 0x00000080, 0x01040080, 0x01040000, 0x21000080, + 0x00040000, 0x00000080, 0x20000000, 0x01040000, + 0x20040080, 0x00040000, 0x01000080, 0x20040080, + 0x21000080, 0x21040000, 0x00040080, 0x20000000, + 0x01000000, 0x20040000, 0x20040000, 0x00000000, + 0x20000080, 0x21040080, 0x21040080, 0x01000080, + 0x21040000, 0x20000080, 0x00000000, 0x21000000, + 0x01040080, 0x01000000, 0x21000000, 0x00040080, + 0x00040000, 0x21000080, 0x00000080, 0x01000000, + 0x20000000, 0x01040000, 0x21000080, 0x20040080, + 0x01000080, 0x20000000, 0x21040000, 0x01040080, + 0x20040080, 0x00000080, 0x01000000, 0x21040000, + 0x21040080, 0x00040080, 0x21000000, 0x21040080, + 0x01040000, 0x00000000, 0x20040000, 0x21000000, + 0x00040080, 0x01000080, 0x20000080, 0x00040000, + 0x00000000, 0x20040000, 0x01040080, 0x20000080 +}; + +static const uint32_t S6[] = { + 0x10000008, 0x10200000, 0x00002000, 0x10202008, + 0x10200000, 0x00000008, 0x10202008, 0x00200000, + 0x10002000, 0x00202008, 0x00200000, 0x10000008, + 0x00200008, 0x10002000, 0x10000000, 0x00002008, + 0x00000000, 0x00200008, 0x10002008, 0x00002000, + 0x00202000, 0x10002008, 0x00000008, 0x10200008, + 0x10200008, 0x00000000, 0x00202008, 0x10202000, + 0x00002008, 0x00202000, 0x10202000, 0x10000000, + 0x10002000, 0x00000008, 0x10200008, 0x00202000, + 0x10202008, 0x00200000, 0x00002008, 0x10000008, + 0x00200000, 0x10002000, 0x10000000, 0x00002008, + 0x10000008, 0x10202008, 0x00202000, 0x10200000, + 0x00202008, 0x10202000, 0x00000000, 0x10200008, + 0x00000008, 0x00002000, 0x10200000, 0x00202008, + 0x00002000, 0x00200008, 0x10002008, 0x00000000, + 0x10202000, 0x10000000, 0x00200008, 0x10002008 +}; + +static const uint32_t S7[] = { + 0x00100000, 0x02100001, 0x02000401, 0x00000000, + 0x00000400, 0x02000401, 0x00100401, 0x02100400, + 0x02100401, 0x00100000, 0x00000000, 0x02000001, + 0x00000001, 0x02000000, 0x02100001, 0x00000401, + 0x02000400, 0x00100401, 0x00100001, 0x02000400, + 0x02000001, 0x02100000, 0x02100400, 0x00100001, + 0x02100000, 0x00000400, 0x00000401, 0x02100401, + 0x00100400, 0x00000001, 0x02000000, 0x00100400, + 0x02000000, 0x00100400, 0x00100000, 0x02000401, + 0x02000401, 0x02100001, 0x02100001, 0x00000001, + 0x00100001, 0x02000000, 0x02000400, 0x00100000, + 0x02100400, 0x00000401, 0x00100401, 0x02100400, + 0x00000401, 0x02000001, 0x02100401, 0x02100000, + 0x00100400, 0x00000000, 0x00000001, 0x02100401, + 0x00000000, 0x00100401, 0x02100000, 0x00000400, + 0x02000001, 0x02000400, 0x00000400, 0x00100001 +}; + +static const uint32_t S8[] = { + 0x08000820, 0x00000800, 0x00020000, 0x08020820, + 0x08000000, 0x08000820, 0x00000020, 0x08000000, + 0x00020020, 0x08020000, 0x08020820, 0x00020800, + 0x08020800, 0x00020820, 0x00000800, 0x00000020, + 0x08020000, 0x08000020, 0x08000800, 0x00000820, + 0x00020800, 0x00020020, 0x08020020, 0x08020800, + 0x00000820, 0x00000000, 0x00000000, 0x08020020, + 0x08000020, 0x08000800, 0x00020820, 0x00020000, + 0x00020820, 0x00020000, 0x08020800, 0x00000800, + 0x00000020, 0x08020020, 0x00000800, 0x00020820, + 0x08000800, 0x00000020, 0x08000020, 0x08020000, + 0x08020020, 0x08000000, 0x00020000, 0x08000820, + 0x00000000, 0x08020820, 0x00020020, 0x08000020, + 0x08020000, 0x08000800, 0x08000820, 0x00000000, + 0x08020820, 0x00020800, 0x00020800, 0x00000820, + 0x00000820, 0x00020020, 0x08000000, 0x08020800 +}; + +static inline uint32_t +Fconf(uint32_t r0, uint32_t skl, uint32_t skr) +{ + uint32_t r1; + + r1 = (r0 << 16) | (r0 >> 16); + return + S1[((r1 >> 11) ^ (skl >> 18)) & 0x3F] + | S2[((r0 >> 23) ^ (skl >> 12)) & 0x3F] + | S3[((r0 >> 19) ^ (skl >> 6)) & 0x3F] + | S4[((r0 >> 15) ^ (skl )) & 0x3F] + | S5[((r0 >> 11) ^ (skr >> 18)) & 0x3F] + | S6[((r0 >> 7) ^ (skr >> 12)) & 0x3F] + | S7[((r0 >> 3) ^ (skr >> 6)) & 0x3F] + | S8[((r1 >> 15) ^ (skr )) & 0x3F]; +} + +static void +process_block_unit(uint32_t *pl, uint32_t *pr, const uint32_t *skey) +{ + int i; + uint32_t l, r; + + l = *pl; + r = *pr; + for (i = 0; i < 16; i ++) { + uint32_t t; + + t = l ^ Fconf(r, skey[(i << 1) + 0], skey[(i << 1) + 1]); + l = r; + r = t; + } + *pl = r; + *pr = l; +} + +/* see inner.h */ +void +br_des_tab_process_block(unsigned num_rounds, const uint32_t *skey, void *block) +{ + unsigned char *buf; + uint32_t l, r; + + buf = block; + l = br_dec32be(buf); + r = br_dec32be(buf + 4); + br_des_do_IP(&l, &r); + while (num_rounds -- > 0) { + process_block_unit(&l, &r, skey); + skey += 32; + } + br_des_do_invIP(&l, &r); + br_enc32be(buf, l); + br_enc32be(buf + 4, r); +} + +static void +keysched_unit(uint32_t *skey, const void *key) +{ + int i; + + br_des_keysched_unit(skey, key); + + /* + * Apply PC-2 to get the 48-bit subkeys. + */ + for (i = 0; i < 16; i ++) { + uint32_t xl, xr, ul, ur; + int j; + + xl = skey[(i << 1) + 0]; + xr = skey[(i << 1) + 1]; + ul = 0; + ur = 0; + for (j = 0; j < 28; j ++) { + ul |= (xl & 1) << PC2left[j]; + ur |= (xr & 1) << PC2right[j]; + xl >>= 1; + xr >>= 1; + } + skey[(i << 1) + 0] = ul; + skey[(i << 1) + 1] = ur; + } +} + +/* see inner.h */ +unsigned +br_des_tab_keysched(uint32_t *skey, const void *key, size_t key_len) +{ + switch (key_len) { + case 8: + keysched_unit(skey, key); + return 1; + case 16: + keysched_unit(skey, key); + keysched_unit(skey + 32, (const unsigned char *)key + 8); + br_des_rev_skey(skey + 32); + memcpy(skey + 64, skey, 32 * sizeof *skey); + return 3; + default: + keysched_unit(skey, key); + keysched_unit(skey + 32, (const unsigned char *)key + 8); + br_des_rev_skey(skey + 32); + keysched_unit(skey + 64, (const unsigned char *)key + 16); + return 3; + } +} |