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-rw-r--r--src/add_threshold/tweakey.c432
1 files changed, 216 insertions, 216 deletions
diff --git a/src/add_threshold/tweakey.c b/src/add_threshold/tweakey.c
index 4b3b1b3..f80ea86 100644
--- a/src/add_threshold/tweakey.c
+++ b/src/add_threshold/tweakey.c
@@ -1,216 +1,216 @@
-/*
-Implementation of the Lilliput-AE tweakable block cipher.
-
-Authors:
- Alexandre Adomnicai,
- Kévin Le Gouguec,
- Léo Reynaud,
- 2019.
-
-For more information, feedback or questions, refer to our website:
-https://paclido.fr/lilliput-ae
-
-To the extent possible under law, the implementer has waived all copyright
-and related or neighboring rights to the source code in this file.
-http://creativecommons.org/publicdomain/zero/1.0/
-
----
-
-This file provides a first-order threshold implementation of Lilliput-TBC's
-tweakey schedule, where the tweak and the key are split into two shares.
-*/
-
-#include <stdint.h>
-#include <string.h>
-
-#include "constants.h"
-#include "tweakey.h"
-
-
-#define LANE_BITS 64
-#define LANE_BYTES (LANE_BITS/8)
-#define LANES_NB (TWEAKEY_BYTES/LANE_BYTES)
-
-
-void tweakey_state_init(
- uint8_t TK_X[TWEAKEY_BYTES],
- uint8_t TK_Y[KEY_BYTES],
- const uint8_t key[KEY_BYTES],
- const uint8_t tweak[TWEAK_BYTES]
-)
-{
- // To be replaced by real random numbers!!!
- uint8_t SHARES_0[KEY_BYTES] = {
- 0x0f, 0x1e, 0x2d, 0x3c, 0x4b, 0x5a, 0x69, 0x78, 0x87, 0x96, 0xa5, 0xb4, 0xc3, 0xd2, 0xe1, 0xf0
- };
-
- memcpy(TK_Y, SHARES_0, KEY_BYTES);
- memcpy(TK_X, tweak, TWEAK_BYTES);
-
- for (size_t i=0; i<KEY_BYTES; i++){
- TK_X[i+TWEAK_BYTES] = key[i] ^ SHARES_0[i] ;
- }
-}
-
-
-void tweakey_state_extract(
- const uint8_t TK_X[TWEAKEY_BYTES],
- const uint8_t TK_Y[KEY_BYTES],
- uint8_t round_constant,
- uint8_t round_tweakey_X[ROUND_TWEAKEY_BYTES],
- uint8_t round_tweakey_Y[ROUND_TWEAKEY_BYTES]
-)
-{
- memset(round_tweakey_X, 0, ROUND_TWEAKEY_BYTES);
- memset(round_tweakey_Y, 0, ROUND_TWEAKEY_BYTES);
-
- for (size_t j=0; j<LANES_NB; j++)
- {
- const uint8_t *TKj_X = TK_X + j*LANE_BYTES;
-
- for (size_t k=0; k<LANE_BYTES; k++)
- {
- round_tweakey_X[k] ^= TKj_X[k];
- }
- }
-
-
- for (size_t j=0; j<(KEY_BYTES / LANE_BYTES); j++)
- {
- const uint8_t *TKj_Y = TK_Y + j*LANE_BYTES;
-
- for (size_t k=0; k<LANE_BYTES; k++)
- {
- round_tweakey_Y[k] ^= TKj_Y[k];
- }
- }
-
- round_tweakey_X[0] ^= round_constant;
-}
-
-
-static void _multiply_M(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES])
-{
- y[7] = x[6];
- y[6] = x[5];
- y[5] = x[5]<<3 ^ x[4];
- y[4] = x[4]>>3 ^ x[3];
- y[3] = x[2];
- y[2] = x[6]<<2 ^ x[1];
- y[1] = x[0];
- y[0] = x[7];
-}
-
-static void _multiply_M2(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES])
-{
- uint8_t x_M_5 = x[5]<<3 ^ x[4];
- uint8_t x_M_4 = x[4]>>3 ^ x[3];
-
- y[7] = x[5];
- y[6] = x_M_5;
- y[5] = x_M_5<<3 ^ x_M_4;
- y[4] = x_M_4>>3 ^ x[2];
- y[3] = x[6]<<2 ^ x[1];
- y[2] = x[5]<<2 ^ x[0];
- y[1] = x[7];
- y[0] = x[6];
-}
-
-static void _multiply_M3(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES])
-{
- uint8_t x_M_5 = x[5]<<3 ^ x[4];
- uint8_t x_M_4 = x[4]>>3 ^ x[3];
- uint8_t x_M2_5 = x_M_5<<3 ^ x_M_4;
- uint8_t x_M2_4 = x_M_4>>3 ^ x[2];
-
- y[7] = x_M_5;
- y[6] = x_M2_5;
- y[5] = x_M2_5<<3 ^ x_M2_4;
- y[4] = x_M2_4>>3 ^ x[6]<<2 ^ x[1];
- y[3] = x[5]<<2 ^ x[0];
- y[2] = x_M_5<<2 ^ x[7];
- y[1] = x[6];
- y[0] = x[5];
-}
-
-static void _multiply_MR(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES])
-{
- y[0] = x[1];
- y[1] = x[2];
- y[2] = x[3] ^ x[4]>>3;
- y[3] = x[4];
- y[4] = x[5] ^ x[6]<<3;
- y[5] = x[3]<<2 ^ x[6];
- y[6] = x[7];
- y[7] = x[0];
-}
-
-static void _multiply_MR2(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES])
-{
- uint8_t x_MR_4 = x[5] ^ x[6]<<3;
-
- y[0] = x[2];
- y[1] = x[3] ^ x[4]>>3;
- y[2] = x[4] ^ x_MR_4>>3;
- y[3] = x_MR_4;
- y[4] = x[3]<<2 ^ x[6] ^ x[7]<<3;
- y[5] = x[4]<<2 ^ x[7];
- y[6] = x[0];
- y[7] = x[1];
-}
-
-static void _multiply_MR3(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES])
-{
- uint8_t x_MR_4 = x[5] ^ x[6]<<3;
- uint8_t x_MR2_4 = x[3]<<2 ^ x[6] ^ x[7]<<3;
-
- y[0] = x[3] ^ x[4]>>3;
- y[1] = x[4] ^ x_MR_4>>3;
- y[2] = x_MR_4 ^ x_MR2_4>>3;
- y[3] = x_MR2_4;
- y[4] = x[0]<<3 ^ x[4]<<2 ^ x[7];
- y[5] = x_MR_4<<2 ^ x[0];
- y[6] = x[1];
- y[7] = x[2];
-}
-
-typedef void (*matrix_multiplication)(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES]);
-
-static const matrix_multiplication ALPHAS[6] = {
- _multiply_M,
- _multiply_M2,
- _multiply_M3,
- _multiply_MR,
- _multiply_MR2,
- _multiply_MR3
-};
-
-
-void tweakey_state_update(uint8_t TK_X[TWEAKEY_BYTES], uint8_t TK_Y[KEY_BYTES])
-{
- /* Skip lane 0, as it is multiplied by the identity matrix. */
-
- for (size_t j=1; j<(TWEAK_BYTES/LANE_BYTES); j++)
- {
- uint8_t *TKj_X = TK_X + j*LANE_BYTES;
-
- uint8_t TKj_old_X[LANE_BYTES];
- memcpy(TKj_old_X, TKj_X, LANE_BYTES);
-
- ALPHAS[j-1](TKj_old_X, TKj_X);
- }
-
- for (size_t j=0; j<(KEY_BYTES/LANE_BYTES); j++)
- {
- uint8_t *TKj_X = TK_X + (j + (TWEAK_BYTES/LANE_BYTES))*LANE_BYTES;
- uint8_t *TKj_Y = TK_Y + j*LANE_BYTES;
-
- uint8_t TKj_X_old[LANE_BYTES];
- uint8_t TKj_Y_old[LANE_BYTES];
- memcpy(TKj_X_old, TKj_X, LANE_BYTES);
- memcpy(TKj_Y_old, TKj_Y, LANE_BYTES);
-
- ALPHAS[j-1 + (TWEAK_BYTES/LANE_BYTES)](TKj_X_old, TKj_X);
- ALPHAS[j-1 + (TWEAK_BYTES/LANE_BYTES)](TKj_Y_old, TKj_Y);
- }
-}
+/*
+Implementation of the Lilliput-AE tweakable block cipher.
+
+Authors:
+ Alexandre Adomnicai,
+ Kévin Le Gouguec,
+ Léo Reynaud,
+ 2019.
+
+For more information, feedback or questions, refer to our website:
+https://paclido.fr/lilliput-ae
+
+To the extent possible under law, the implementer has waived all copyright
+and related or neighboring rights to the source code in this file.
+http://creativecommons.org/publicdomain/zero/1.0/
+
+---
+
+This file provides a first-order threshold implementation of Lilliput-TBC's
+tweakey schedule, where the tweak and the key are split into two shares.
+*/
+
+#include <stdint.h>
+#include <string.h>
+
+#include "constants.h"
+#include "tweakey.h"
+
+
+#define LANE_BITS 64
+#define LANE_BYTES (LANE_BITS/8)
+#define LANES_NB (TWEAKEY_BYTES/LANE_BYTES)
+
+
+void tweakey_state_init(
+ uint8_t TK_X[TWEAKEY_BYTES],
+ uint8_t TK_Y[KEY_BYTES],
+ const uint8_t key[KEY_BYTES],
+ const uint8_t tweak[TWEAK_BYTES]
+)
+{
+ // To be replaced by real random numbers!!!
+ uint8_t SHARES_0[KEY_BYTES] = {
+ 0x0f, 0x1e, 0x2d, 0x3c, 0x4b, 0x5a, 0x69, 0x78, 0x87, 0x96, 0xa5, 0xb4, 0xc3, 0xd2, 0xe1, 0xf0
+ };
+
+ memcpy(TK_Y, SHARES_0, KEY_BYTES);
+ memcpy(TK_X, tweak, TWEAK_BYTES);
+
+ for (size_t i=0; i<KEY_BYTES; i++){
+ TK_X[i+TWEAK_BYTES] = key[i] ^ SHARES_0[i] ;
+ }
+}
+
+
+void tweakey_state_extract(
+ const uint8_t TK_X[TWEAKEY_BYTES],
+ const uint8_t TK_Y[KEY_BYTES],
+ uint8_t round_constant,
+ uint8_t round_tweakey_X[ROUND_TWEAKEY_BYTES],
+ uint8_t round_tweakey_Y[ROUND_TWEAKEY_BYTES]
+)
+{
+ memset(round_tweakey_X, 0, ROUND_TWEAKEY_BYTES);
+ memset(round_tweakey_Y, 0, ROUND_TWEAKEY_BYTES);
+
+ for (size_t j=0; j<LANES_NB; j++)
+ {
+ const uint8_t *TKj_X = TK_X + j*LANE_BYTES;
+
+ for (size_t k=0; k<LANE_BYTES; k++)
+ {
+ round_tweakey_X[k] ^= TKj_X[k];
+ }
+ }
+
+
+ for (size_t j=0; j<(KEY_BYTES / LANE_BYTES); j++)
+ {
+ const uint8_t *TKj_Y = TK_Y + j*LANE_BYTES;
+
+ for (size_t k=0; k<LANE_BYTES; k++)
+ {
+ round_tweakey_Y[k] ^= TKj_Y[k];
+ }
+ }
+
+ round_tweakey_X[0] ^= round_constant;
+}
+
+
+static void _multiply_M(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES])
+{
+ y[7] = x[6];
+ y[6] = x[5];
+ y[5] = x[5]<<3 ^ x[4];
+ y[4] = x[4]>>3 ^ x[3];
+ y[3] = x[2];
+ y[2] = x[6]<<2 ^ x[1];
+ y[1] = x[0];
+ y[0] = x[7];
+}
+
+static void _multiply_M2(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES])
+{
+ uint8_t x_M_5 = x[5]<<3 ^ x[4];
+ uint8_t x_M_4 = x[4]>>3 ^ x[3];
+
+ y[7] = x[5];
+ y[6] = x_M_5;
+ y[5] = x_M_5<<3 ^ x_M_4;
+ y[4] = x_M_4>>3 ^ x[2];
+ y[3] = x[6]<<2 ^ x[1];
+ y[2] = x[5]<<2 ^ x[0];
+ y[1] = x[7];
+ y[0] = x[6];
+}
+
+static void _multiply_M3(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES])
+{
+ uint8_t x_M_5 = x[5]<<3 ^ x[4];
+ uint8_t x_M_4 = x[4]>>3 ^ x[3];
+ uint8_t x_M2_5 = x_M_5<<3 ^ x_M_4;
+ uint8_t x_M2_4 = x_M_4>>3 ^ x[2];
+
+ y[7] = x_M_5;
+ y[6] = x_M2_5;
+ y[5] = x_M2_5<<3 ^ x_M2_4;
+ y[4] = x_M2_4>>3 ^ x[6]<<2 ^ x[1];
+ y[3] = x[5]<<2 ^ x[0];
+ y[2] = x_M_5<<2 ^ x[7];
+ y[1] = x[6];
+ y[0] = x[5];
+}
+
+static void _multiply_MR(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES])
+{
+ y[0] = x[1];
+ y[1] = x[2];
+ y[2] = x[3] ^ x[4]>>3;
+ y[3] = x[4];
+ y[4] = x[5] ^ x[6]<<3;
+ y[5] = x[3]<<2 ^ x[6];
+ y[6] = x[7];
+ y[7] = x[0];
+}
+
+static void _multiply_MR2(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES])
+{
+ uint8_t x_MR_4 = x[5] ^ x[6]<<3;
+
+ y[0] = x[2];
+ y[1] = x[3] ^ x[4]>>3;
+ y[2] = x[4] ^ x_MR_4>>3;
+ y[3] = x_MR_4;
+ y[4] = x[3]<<2 ^ x[6] ^ x[7]<<3;
+ y[5] = x[4]<<2 ^ x[7];
+ y[6] = x[0];
+ y[7] = x[1];
+}
+
+static void _multiply_MR3(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES])
+{
+ uint8_t x_MR_4 = x[5] ^ x[6]<<3;
+ uint8_t x_MR2_4 = x[3]<<2 ^ x[6] ^ x[7]<<3;
+
+ y[0] = x[3] ^ x[4]>>3;
+ y[1] = x[4] ^ x_MR_4>>3;
+ y[2] = x_MR_4 ^ x_MR2_4>>3;
+ y[3] = x_MR2_4;
+ y[4] = x[0]<<3 ^ x[4]<<2 ^ x[7];
+ y[5] = x_MR_4<<2 ^ x[0];
+ y[6] = x[1];
+ y[7] = x[2];
+}
+
+typedef void (*matrix_multiplication)(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES]);
+
+static const matrix_multiplication ALPHAS[6] = {
+ _multiply_M,
+ _multiply_M2,
+ _multiply_M3,
+ _multiply_MR,
+ _multiply_MR2,
+ _multiply_MR3
+};
+
+
+void tweakey_state_update(uint8_t TK_X[TWEAKEY_BYTES], uint8_t TK_Y[KEY_BYTES])
+{
+ /* Skip lane 0, as it is multiplied by the identity matrix. */
+
+ for (size_t j=1; j<(TWEAK_BYTES/LANE_BYTES); j++)
+ {
+ uint8_t *TKj_X = TK_X + j*LANE_BYTES;
+
+ uint8_t TKj_old_X[LANE_BYTES];
+ memcpy(TKj_old_X, TKj_X, LANE_BYTES);
+
+ ALPHAS[j-1](TKj_old_X, TKj_X);
+ }
+
+ for (size_t j=0; j<(KEY_BYTES/LANE_BYTES); j++)
+ {
+ uint8_t *TKj_X = TK_X + (j + (TWEAK_BYTES/LANE_BYTES))*LANE_BYTES;
+ uint8_t *TKj_Y = TK_Y + j*LANE_BYTES;
+
+ uint8_t TKj_X_old[LANE_BYTES];
+ uint8_t TKj_Y_old[LANE_BYTES];
+ memcpy(TKj_X_old, TKj_X, LANE_BYTES);
+ memcpy(TKj_Y_old, TKj_Y, LANE_BYTES);
+
+ ALPHAS[j-1 + (TWEAK_BYTES/LANE_BYTES)](TKj_X_old, TKj_X);
+ ALPHAS[j-1 + (TWEAK_BYTES/LANE_BYTES)](TKj_Y_old, TKj_Y);
+ }
+}
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