Jason Cooper | c2c7426 | 2014-03-24 02:32:49 +0000 | [diff] [blame] | 1 | #include <linux/string.h> |
Jake Edge | 85dfd52 | 2014-05-19 17:48:24 -0600 | [diff] [blame] | 2 | #include "threefish_api.h" |
Jason Cooper | 449bb81 | 2014-03-24 01:48:58 +0000 | [diff] [blame] | 3 | |
Anton Saraev | 95f1840a | 2014-05-19 12:09:55 +0400 | [diff] [blame] | 4 | void threefish_set_key(struct threefish_key *key_ctx, |
| 5 | enum threefish_size state_size, |
| 6 | u64 *key_data, u64 *tweak) |
Jason Cooper | 449bb81 | 2014-03-24 01:48:58 +0000 | [diff] [blame] | 7 | { |
Anton Saraev | 95f1840a | 2014-05-19 12:09:55 +0400 | [diff] [blame] | 8 | int key_words = state_size / 64; |
Jason Cooper | 39bd42b | 2014-03-24 01:49:09 +0000 | [diff] [blame] | 9 | int i; |
Anton Saraev | 0264b7b | 2014-05-19 12:09:58 +0400 | [diff] [blame] | 10 | u64 parity = KEY_SCHEDULE_CONST; |
Jason Cooper | 449bb81 | 2014-03-24 01:48:58 +0000 | [diff] [blame] | 11 | |
Anton Saraev | 95f1840a | 2014-05-19 12:09:55 +0400 | [diff] [blame] | 12 | key_ctx->tweak[0] = tweak[0]; |
| 13 | key_ctx->tweak[1] = tweak[1]; |
| 14 | key_ctx->tweak[2] = tweak[0] ^ tweak[1]; |
Jason Cooper | 449bb81 | 2014-03-24 01:48:58 +0000 | [diff] [blame] | 15 | |
Anton Saraev | 95f1840a | 2014-05-19 12:09:55 +0400 | [diff] [blame] | 16 | for (i = 0; i < key_words; i++) { |
| 17 | key_ctx->key[i] = key_data[i]; |
| 18 | parity ^= key_data[i]; |
Jason Cooper | 39bd42b | 2014-03-24 01:49:09 +0000 | [diff] [blame] | 19 | } |
Anton Saraev | 95f1840a | 2014-05-19 12:09:55 +0400 | [diff] [blame] | 20 | key_ctx->key[i] = parity; |
| 21 | key_ctx->state_size = state_size; |
Jason Cooper | 449bb81 | 2014-03-24 01:48:58 +0000 | [diff] [blame] | 22 | } |
| 23 | |
Anton Saraev | 95f1840a | 2014-05-19 12:09:55 +0400 | [diff] [blame] | 24 | void threefish_encrypt_block_bytes(struct threefish_key *key_ctx, u8 *in, |
Anton Saraev | 68ace62 | 2014-05-19 12:09:54 +0400 | [diff] [blame] | 25 | u8 *out) |
Jason Cooper | 449bb81 | 2014-03-24 01:48:58 +0000 | [diff] [blame] | 26 | { |
Jason Cooper | 39bd42b | 2014-03-24 01:49:09 +0000 | [diff] [blame] | 27 | u64 plain[SKEIN_MAX_STATE_WORDS]; /* max number of words*/ |
| 28 | u64 cipher[SKEIN_MAX_STATE_WORDS]; |
| 29 | |
Anton Saraev | 0264b7b | 2014-05-19 12:09:58 +0400 | [diff] [blame] | 30 | skein_get64_lsb_first(plain, in, key_ctx->state_size / 64); |
Anton Saraev | 95f1840a | 2014-05-19 12:09:55 +0400 | [diff] [blame] | 31 | threefish_encrypt_block_words(key_ctx, plain, cipher); |
Anton Saraev | 0264b7b | 2014-05-19 12:09:58 +0400 | [diff] [blame] | 32 | skein_put64_lsb_first(out, cipher, key_ctx->state_size / 8); |
Jason Cooper | 449bb81 | 2014-03-24 01:48:58 +0000 | [diff] [blame] | 33 | } |
| 34 | |
Anton Saraev | 95f1840a | 2014-05-19 12:09:55 +0400 | [diff] [blame] | 35 | void threefish_encrypt_block_words(struct threefish_key *key_ctx, u64 *in, |
Anton Saraev | 68ace62 | 2014-05-19 12:09:54 +0400 | [diff] [blame] | 36 | u64 *out) |
Jason Cooper | 449bb81 | 2014-03-24 01:48:58 +0000 | [diff] [blame] | 37 | { |
Anton Saraev | 95f1840a | 2014-05-19 12:09:55 +0400 | [diff] [blame] | 38 | switch (key_ctx->state_size) { |
Anton Saraev | 9435d3a | 2014-05-19 12:09:57 +0400 | [diff] [blame] | 39 | case THREEFISH_256: |
Anton Saraev | 95f1840a | 2014-05-19 12:09:55 +0400 | [diff] [blame] | 40 | threefish_encrypt_256(key_ctx, in, out); |
Jason Cooper | 39bd42b | 2014-03-24 01:49:09 +0000 | [diff] [blame] | 41 | break; |
Anton Saraev | 9435d3a | 2014-05-19 12:09:57 +0400 | [diff] [blame] | 42 | case THREEFISH_512: |
Anton Saraev | 95f1840a | 2014-05-19 12:09:55 +0400 | [diff] [blame] | 43 | threefish_encrypt_512(key_ctx, in, out); |
Jason Cooper | 39bd42b | 2014-03-24 01:49:09 +0000 | [diff] [blame] | 44 | break; |
Anton Saraev | 9435d3a | 2014-05-19 12:09:57 +0400 | [diff] [blame] | 45 | case THREEFISH_1024: |
Anton Saraev | 95f1840a | 2014-05-19 12:09:55 +0400 | [diff] [blame] | 46 | threefish_encrypt_1024(key_ctx, in, out); |
Jason Cooper | 39bd42b | 2014-03-24 01:49:09 +0000 | [diff] [blame] | 47 | break; |
| 48 | } |
Jason Cooper | 449bb81 | 2014-03-24 01:48:58 +0000 | [diff] [blame] | 49 | } |
| 50 | |
Anton Saraev | 95f1840a | 2014-05-19 12:09:55 +0400 | [diff] [blame] | 51 | void threefish_decrypt_block_bytes(struct threefish_key *key_ctx, u8 *in, |
Anton Saraev | 68ace62 | 2014-05-19 12:09:54 +0400 | [diff] [blame] | 52 | u8 *out) |
Jason Cooper | 449bb81 | 2014-03-24 01:48:58 +0000 | [diff] [blame] | 53 | { |
Jason Cooper | 39bd42b | 2014-03-24 01:49:09 +0000 | [diff] [blame] | 54 | u64 plain[SKEIN_MAX_STATE_WORDS]; /* max number of words*/ |
| 55 | u64 cipher[SKEIN_MAX_STATE_WORDS]; |
| 56 | |
Anton Saraev | 0264b7b | 2014-05-19 12:09:58 +0400 | [diff] [blame] | 57 | skein_get64_lsb_first(cipher, in, key_ctx->state_size / 64); |
Anton Saraev | 95f1840a | 2014-05-19 12:09:55 +0400 | [diff] [blame] | 58 | threefish_decrypt_block_words(key_ctx, cipher, plain); |
Anton Saraev | 0264b7b | 2014-05-19 12:09:58 +0400 | [diff] [blame] | 59 | skein_put64_lsb_first(out, plain, key_ctx->state_size / 8); |
Jason Cooper | 449bb81 | 2014-03-24 01:48:58 +0000 | [diff] [blame] | 60 | } |
| 61 | |
Anton Saraev | 95f1840a | 2014-05-19 12:09:55 +0400 | [diff] [blame] | 62 | void threefish_decrypt_block_words(struct threefish_key *key_ctx, u64 *in, |
Anton Saraev | 68ace62 | 2014-05-19 12:09:54 +0400 | [diff] [blame] | 63 | u64 *out) |
Jason Cooper | 449bb81 | 2014-03-24 01:48:58 +0000 | [diff] [blame] | 64 | { |
Anton Saraev | 95f1840a | 2014-05-19 12:09:55 +0400 | [diff] [blame] | 65 | switch (key_ctx->state_size) { |
Anton Saraev | 9435d3a | 2014-05-19 12:09:57 +0400 | [diff] [blame] | 66 | case THREEFISH_256: |
Anton Saraev | 95f1840a | 2014-05-19 12:09:55 +0400 | [diff] [blame] | 67 | threefish_decrypt_256(key_ctx, in, out); |
Jason Cooper | 39bd42b | 2014-03-24 01:49:09 +0000 | [diff] [blame] | 68 | break; |
Anton Saraev | 9435d3a | 2014-05-19 12:09:57 +0400 | [diff] [blame] | 69 | case THREEFISH_512: |
Anton Saraev | 95f1840a | 2014-05-19 12:09:55 +0400 | [diff] [blame] | 70 | threefish_decrypt_512(key_ctx, in, out); |
Jason Cooper | 39bd42b | 2014-03-24 01:49:09 +0000 | [diff] [blame] | 71 | break; |
Anton Saraev | 9435d3a | 2014-05-19 12:09:57 +0400 | [diff] [blame] | 72 | case THREEFISH_1024: |
Anton Saraev | 95f1840a | 2014-05-19 12:09:55 +0400 | [diff] [blame] | 73 | threefish_decrypt_1024(key_ctx, in, out); |
Jason Cooper | 39bd42b | 2014-03-24 01:49:09 +0000 | [diff] [blame] | 74 | break; |
| 75 | } |
Jason Cooper | 449bb81 | 2014-03-24 01:48:58 +0000 | [diff] [blame] | 76 | } |
| 77 | |