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- #include <linux/string.h>
- #include "threefish_api.h"
- void threefish_set_key(struct threefish_key *key_ctx,
- enum threefish_size state_size,
- u64 *key_data, u64 *tweak)
- {
- int key_words = state_size / 64;
- int i;
- u64 parity = KEY_SCHEDULE_CONST;
- key_ctx->tweak[0] = tweak[0];
- key_ctx->tweak[1] = tweak[1];
- key_ctx->tweak[2] = tweak[0] ^ tweak[1];
- for (i = 0; i < key_words; i++) {
- key_ctx->key[i] = key_data[i];
- parity ^= key_data[i];
- }
- key_ctx->key[i] = parity;
- key_ctx->state_size = state_size;
- }
- void threefish_encrypt_block_bytes(struct threefish_key *key_ctx, u8 *in,
- u8 *out)
- {
- u64 plain[SKEIN_MAX_STATE_WORDS]; /* max number of words*/
- u64 cipher[SKEIN_MAX_STATE_WORDS];
- skein_get64_lsb_first(plain, in, key_ctx->state_size / 64);
- threefish_encrypt_block_words(key_ctx, plain, cipher);
- skein_put64_lsb_first(out, cipher, key_ctx->state_size / 8);
- }
- void threefish_encrypt_block_words(struct threefish_key *key_ctx, u64 *in,
- u64 *out)
- {
- switch (key_ctx->state_size) {
- case THREEFISH_256:
- threefish_encrypt_256(key_ctx, in, out);
- break;
- case THREEFISH_512:
- threefish_encrypt_512(key_ctx, in, out);
- break;
- case THREEFISH_1024:
- threefish_encrypt_1024(key_ctx, in, out);
- break;
- }
- }
- void threefish_decrypt_block_bytes(struct threefish_key *key_ctx, u8 *in,
- u8 *out)
- {
- u64 plain[SKEIN_MAX_STATE_WORDS]; /* max number of words*/
- u64 cipher[SKEIN_MAX_STATE_WORDS];
- skein_get64_lsb_first(cipher, in, key_ctx->state_size / 64);
- threefish_decrypt_block_words(key_ctx, cipher, plain);
- skein_put64_lsb_first(out, plain, key_ctx->state_size / 8);
- }
- void threefish_decrypt_block_words(struct threefish_key *key_ctx, u64 *in,
- u64 *out)
- {
- switch (key_ctx->state_size) {
- case THREEFISH_256:
- threefish_decrypt_256(key_ctx, in, out);
- break;
- case THREEFISH_512:
- threefish_decrypt_512(key_ctx, in, out);
- break;
- case THREEFISH_1024:
- threefish_decrypt_1024(key_ctx, in, out);
- break;
- }
- }
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