From 833b24eb5dffcfb675aabbefd2435ed6f6b72bfe Mon Sep 17 00:00:00 2001
From: Kévin Le Gouguec <kevin.legouguec@airbus.com>
Date: Tue, 5 Feb 2019 08:21:47 +0100
Subject: Mise en commun des sources à l'aide de liens symboliques
MIME-Version: 1.0
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---
 src/add_tweakeyloop/ae-common.h | 128 +---------------------------------------
 1 file changed, 1 insertion(+), 127 deletions(-)
 mode change 100644 => 120000 src/add_tweakeyloop/ae-common.h

(limited to 'src/add_tweakeyloop/ae-common.h')

diff --git a/src/add_tweakeyloop/ae-common.h b/src/add_tweakeyloop/ae-common.h
deleted file mode 100644
index 561854e..0000000
--- a/src/add_tweakeyloop/ae-common.h
+++ /dev/null
@@ -1,127 +0,0 @@
-#ifndef AE_COMMON_H
-#define AE_COMMON_H
-
-#include <stddef.h>
-#include <stdint.h>
-#include <string.h>
-
-#include "cipher.h"
-#include "parameters.h"
-
-
-static inline uint8_t upper_nibble(uint8_t i)
-{
-    return i >> 4;
-}
-
-static inline uint8_t lower_nibble(uint8_t i)
-{
-    return i & 0x0f;
-}
-
-static inline void encrypt(const uint8_t K[KEY_BYTES],
-                           const uint8_t T[TWEAK_BYTES],
-                           const uint8_t M[BLOCK_BYTES],
-                           uint8_t C[BLOCK_BYTES])
-{
-    lilliput_tbc_encrypt(K, T, M, C);
-}
-
-static inline void decrypt(const uint8_t K[KEY_BYTES],
-                           const uint8_t T[TWEAK_BYTES],
-                           const uint8_t C[BLOCK_BYTES],
-                           uint8_t M[BLOCK_BYTES])
-{
-    lilliput_tbc_decrypt(K, T, C, M);
-}
-
-static inline void xor_into(uint8_t dest[BLOCK_BYTES], const uint8_t src[BLOCK_BYTES])
-{
-    for (size_t i=0; i<BLOCK_BYTES; i++)
-        dest[i] ^= src[i];
-}
-
-static inline void xor_arrays(size_t len, uint8_t out[len], const uint8_t a[len], const uint8_t b[len])
-{
-    for (size_t i=0; i<len; i++)
-        out[i] = a[i] ^ b[i];
-}
-
-static inline void pad10(size_t X_len, const uint8_t X[X_len], uint8_t padded[BLOCK_BYTES])
-{
-    /* pad10*(X) = X || 1 || 0^{n-|X|-1} */
-
-    /* Assume that len<BLOCK_BYTES. */
-
-    size_t pad_len = BLOCK_BYTES-X_len;
-
-    memcpy(padded+pad_len, X, X_len);
-
-    padded[pad_len-1] = 0x80;
-
-    if (pad_len > 1)
-    {
-        memset(padded, 0, pad_len-1);
-    }
-}
-
-static inline void fill_index_tweak(
-    uint8_t  prefix,
-    uint64_t block_index,
-    uint8_t  tweak[TWEAK_BYTES]
-)
-{
-    /* The t-bit tweak is filled as follows:
-     *
-     * - bits [  1, t-4]: block index
-     *        [  1,  64]: actual 64-bit block index
-     *        [ 65, t-4]: 0-padding
-     * - bits [t-3,   t]: constant 4-bit prefix
-     */
-
-    for (size_t i=0; i<sizeof(block_index); i++)
-    {
-        tweak[i] = block_index >> 8*i & 0xff;
-    }
-
-    /* Assume padding bytes have already been memset to 0. */
-
-    tweak[TWEAK_BYTES-1] |= prefix << 4;
-}
-
-static void process_associated_data(
-    const uint8_t key[KEY_BYTES],
-    size_t        A_len,
-    const uint8_t A[A_len],
-    uint8_t       Auth[BLOCK_BYTES]
-)
-{
-    uint8_t Ek_Ai[BLOCK_BYTES];
-    uint8_t tweak[TWEAK_BYTES];
-
-    memset(tweak, 0, TWEAK_BYTES);
-    memset(Auth, 0, BLOCK_BYTES);
-
-    size_t l_a = A_len / BLOCK_BYTES;
-    size_t rest = A_len % BLOCK_BYTES;
-
-    for (size_t i=0; i<l_a; i++)
-    {
-        fill_index_tweak(0x2, i, tweak);
-        encrypt(key, tweak, &A[i*BLOCK_BYTES], Ek_Ai);
-        xor_into(Auth, Ek_Ai);
-    }
-
-    if (rest != 0)
-    {
-        uint8_t A_rest[BLOCK_BYTES];
-        pad10(rest, &A[l_a*BLOCK_BYTES], A_rest);
-        fill_index_tweak(0x6, l_a, tweak);
-        encrypt(key, tweak, A_rest, Ek_Ai);
-        xor_into(Auth, Ek_Ai);
-    }
-}
-
-
-
-#endif /* AE_COMMON_H */
diff --git a/src/add_tweakeyloop/ae-common.h b/src/add_tweakeyloop/ae-common.h
new file mode 120000
index 0000000..73641f5
--- /dev/null
+++ b/src/add_tweakeyloop/ae-common.h
@@ -0,0 +1 @@
+../ref/ae-common.h
\ No newline at end of file
-- 
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