1 files changed, 0 insertions, 170 deletions
diff --git a/crypto_aead/lilliputaei128v1/ref/cipher.c b/crypto_aead/lilliputaei128v1/ref/cipher.c
deleted file mode 100644
index 7f1152a..0000000
--- a/crypto_aead/lilliputaei128v1/ref/cipher.c
+++ /dev/null
@@ -1,170 +0,0 @@
-#include <stdint.h>
-#include <string.h>
-
-#include "cipher.h"
-#include "constants.h"
-#include "parameters.h"
-#include "tweakey.h"
-
-
-enum permutation
-{
-    PERMUTATION_ENCRYPTION = 0,
-    PERMUTATION_DECRYPTION = 1,
-    PERMUTATION_NONE
-};
-
-typedef enum permutation permutation;
-
-const uint8_t PERMUTATIONS[2][BLOCK_BYTES] = {
-    /* PI(i) */
-    [0] = { 13, 9, 14, 8, 10, 11, 12, 15,
-            4,  5, 3,  1, 2,  6,  0,  7 },
-    /* PI^-1(i) */
-    [1] = { 14, 11, 12, 10, 8, 9, 13, 15,
-            3,  1,  4,  5,  6, 0, 2,  7 }
-};
-
-
-struct cipher_state
-{
-    uint8_t X[BLOCK_BYTES];
-};
-
-
-typedef struct cipher_state cipher_state;
-
-
-static void _state_init(cipher_state *X, const uint8_t message[BLOCK_BYTES])
-{
-    memcpy(X->X, message, sizeof(X->X));
-}
-
-
-static void _compute_round_tweakeys(
-    const uint8_t key[KEY_BYTES],
-    const uint8_t tweak[TWEAK_BYTES],
-    uint8_t RTK[ROUNDS][ROUND_TWEAKEY_BYTES]
-)
-{
-    tweakey_state TK;
-    tweakey_state_init(&TK, key, tweak);
-    tweakey_state_extract(&TK, RTK[0], 0);
-
-    for (uint8_t i=1; i<ROUNDS; i++)
-    {
-        tweakey_state_update(&TK);
-        tweakey_state_extract(&TK, RTK[i], i);
-    }
-}
-
-
-static void _nonlinear_layer(cipher_state *X, const uint8_t RTK[ROUND_TWEAKEY_BYTES])
-{
-    uint8_t F[ROUND_TWEAKEY_BYTES];
-    for (size_t j=0; j<sizeof(F); j++)
-    {
-        F[j] = X->X[j] ^ RTK[j];
-    }
-
-    for (size_t j=0; j<sizeof(F); j++)
-    {
-        F[j] = S[F[j]];
-    }
-
-    for (size_t j=0; j<8; j++)
-    {
-        size_t dest_j = 15-j;
-        X->X[dest_j] ^= F[j];
-    }
-}
-
-static void _linear_layer(cipher_state *X)
-{
-    X->X[15] ^= X->X[1];
-    X->X[15] ^= X->X[2];
-    X->X[15] ^= X->X[3];
-    X->X[15] ^= X->X[4];
-    X->X[15] ^= X->X[5];
-    X->X[15] ^= X->X[6];
-    X->X[15] ^= X->X[7];
-
-    X->X[14] ^= X->X[7];
-    X->X[13] ^= X->X[7];
-    X->X[12] ^= X->X[7];
-    X->X[11] ^= X->X[7];
-    X->X[10] ^= X->X[7];
-    X->X[9]  ^= X->X[7];
-}
-
-static void _permutation_layer(cipher_state *X, permutation p)
-{
-    if (p == PERMUTATION_NONE)
-    {
-        return;
-    }
-
-    uint8_t X_old[BLOCK_BYTES];
-    memcpy(X_old, X, sizeof(X_old));
-
-    const uint8_t *pi = PERMUTATIONS[p];
-
-    for (size_t j=0; j<BLOCK_BYTES; j++)
-    {
-        X->X[pi[j]] = X_old[j];
-    }
-}
-
-static void _one_round_egfn(cipher_state *X, const uint8_t RTK[ROUND_TWEAKEY_BYTES], permutation p)
-{
-    _nonlinear_layer(X, RTK);
-    _linear_layer(X);
-    _permutation_layer(X, p);
-}
-
-
-void lilliput_tbc_encrypt(
-    const uint8_t key[KEY_BYTES],
-    const uint8_t tweak[TWEAK_BYTES],
-    const uint8_t message[BLOCK_BYTES],
-    uint8_t ciphertext[BLOCK_BYTES]
-)
-{
-    cipher_state X;
-    _state_init(&X, message);
-
-    uint8_t RTK[ROUNDS][ROUND_TWEAKEY_BYTES];
-    _compute_round_tweakeys(key, tweak, RTK);
-
-    for (uint8_t i=0; i<ROUNDS-1; i++)
-    {
-        _one_round_egfn(&X, RTK[i], PERMUTATION_ENCRYPTION);
-    }
-
-    _one_round_egfn(&X, RTK[ROUNDS-1], PERMUTATION_NONE);
-
-    memcpy(ciphertext, X.X, BLOCK_BYTES);
-}
-
-void lilliput_tbc_decrypt(
-    const uint8_t key[KEY_BYTES],
-    const uint8_t tweak[TWEAK_BYTES],
-    const uint8_t ciphertext[BLOCK_BYTES],
-    uint8_t message[BLOCK_BYTES]
-)
-{
-    cipher_state X;
-    _state_init(&X, ciphertext);
-
-    uint8_t RTK[ROUNDS][ROUND_TWEAKEY_BYTES];
-    _compute_round_tweakeys(key, tweak, RTK);
-
-    for (uint8_t i=0; i<ROUNDS-1; i++)
-    {
-        _one_round_egfn(&X, RTK[ROUNDS-1-i], PERMUTATION_DECRYPTION);
-    }
-
-    _one_round_egfn(&X, RTK[0], PERMUTATION_NONE);
-
-    memcpy(message, X.X, BLOCK_BYTES);
-}