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Diffstat (limited to 'src/libsodium/crypto_stream/aes256estream/hongjun/aes256-ctr.c')
-rw-r--r--src/libsodium/crypto_stream/aes256estream/hongjun/aes256-ctr.c239
1 files changed, 0 insertions, 239 deletions
diff --git a/src/libsodium/crypto_stream/aes256estream/hongjun/aes256-ctr.c b/src/libsodium/crypto_stream/aes256estream/hongjun/aes256-ctr.c
deleted file mode 100644
index c35e310..0000000
--- a/src/libsodium/crypto_stream/aes256estream/hongjun/aes256-ctr.c
+++ /dev/null
@@ -1,239 +0,0 @@
-/* aes-ctr.c */
-/* AES in CTR mode. */
-
-/* Hongjun Wu, January 2007*/
-
-
-/* ------------------------------------------------------------------------- */
-
-#include "api.h"
-#include "aes256.h"
-
-#include <string.h>
-
-/* ------------------------------------------------------------------------- */
-/* key setup for AES-256*/
-static void
-ECRYPT_keysetup(ECRYPT_ctx* ctx, const u8* key, u32 keysize, u32 ivsize)
-{
- unsigned int w[Nk*(Nr+1)], temp;
- int i, j;
-
- (void) keysize;
- (void) ivsize;
- (void) sizeof(char[sizeof *ctx == crypto_stream_BEFORENMBYTES ? 1 : -1]);
-
- for( i = 0; i < Nk; i++ ) {
- w[i] = key[(i << 2)];
- w[i] |= key[(i << 2)+1] << 8;
- w[i] |= key[(i << 2)+2] << 16;
- w[i] |= (unsigned int) key[(i << 2)+3] << 24;
- }
-
- i = Nk;
-
- while( i < Nb*(Nr+1) ) {
- temp = w[i-1];
-
- temp = (unsigned int) Sbox[temp & 0xFF] << 24 ^
- Sbox[(temp >> 8) & 0xFF] ^
- (Sbox[(temp >> 16) & 0xFF] << 8 ) ^
- (Sbox[(temp >> 24) & 0xFF] << 16) ^
- Rcon[i/Nk];
- w[i] = w[i-Nk] ^ temp;
- i++;
-
- temp = w[i-1];
- w[i] = w[i-Nk] ^ temp;
- i++;
-
- temp = w[i-1];
- w[i] = w[i-Nk] ^ temp;
- i++;
-
- temp = w[i-1];
- w[i] = w[i-Nk] ^ temp;
- i++;
-
- temp = w[i-1];
- temp = Sbox[temp & 0xFF] ^
- Sbox[(temp >> 8) & 0xFF] << 8 ^
- (Sbox[(temp >> 16) & 0xFF] << 16) ^
- ((unsigned int) Sbox[(temp >> 24) & 0xFF] << 24);
- w[i] = w[i-Nk] ^ temp;
- i++;
-
- temp = w[i-1];
- w[i] = w[i-Nk] ^ temp;
- i++;
-
- temp = w[i-1];
- w[i] = w[i-Nk] ^ temp;
- i++;
-
- temp = w[i-1];
- w[i] = w[i-Nk] ^ temp;
- i++;
- }
-
- for (i = 0; i <= Nr; i++) {
- for (j = 0; j < Nb; j++) {
- ctx->round_key[i][j] = SWP32(w[(i<<2)+j]);
- }
- }
-}
-
-/* ------------------------------------------------------------------------- */
-
-static void
-ECRYPT_ivsetup(ECRYPT_ctx* ctx, const u8* iv)
-{
- (void) sizeof(char[(sizeof ctx->counter) == crypto_stream_NONCEBYTES ? 1 : -1]);
- memcpy(ctx->counter, iv, crypto_stream_NONCEBYTES);
-}
-
-/* ------------------------------------------------------------------------- */
-
-/*compute the intermediate values for the first two rounds*/
-static void
-partial_precompute_tworounds(ECRYPT_ctx* ctx)
-{
- u32 x0,x1,x2,x3,y0,y1,y2,y3;
-
- x0 = ctx->counter[0] ^ ctx->round_key[0][0];
- x1 = ctx->counter[1] ^ ctx->round_key[0][1];
- x2 = ctx->counter[2] ^ ctx->round_key[0][2];
- x3 = ctx->counter[3] ^ ctx->round_key[0][3];
- x0 &= SWP32(0xffffff00);
- round(ctx,x0,x1,x2,x3,y0,y1,y2,y3,1);
- ctx->first_round_output_x0 = y0 ^ T0[0];
- y0 = 0;
- round(ctx,y0,y1,y2,y3,x0,x1,x2,x3,2);
- ctx->second_round_output[0] = x0 ^ T0[0];
- ctx->second_round_output[1] = x1 ^ T3[0];
- ctx->second_round_output[2] = x2 ^ T2[0];
- ctx->second_round_output[3] = x3 ^ T1[0];
-}
-
-/* ------------------------------------------------------------------------- */
-
-#ifndef CPU_ALIGNED_ACCESS_REQUIRED
-# define UNALIGNED_U32_READ(P, I) (((const u32 *)(const void *) (P))[(I)])
-#else
-static inline uint32_t
-UNALIGNED_U32_READ(const u8 * const p, const size_t i)
-{
- uint32_t t;
- (void) sizeof(int[sizeof(*p) == sizeof(char) ? 1 : -1]);
- memcpy(&t, p + i * (sizeof t / sizeof *p), sizeof t);
- return t;
-}
-#endif
-
-/* ------------------------------------------------------------------------- */
-
-static void
-ECRYPT_process_bytes(int action, ECRYPT_ctx* ctx, const u8* input, u8* output,
- u32 msglen)
-{
- __attribute__((aligned(32))) u8 keystream[16];
- u32 i;
-
- (void) action;
- memset(keystream, 0, sizeof keystream);
- partial_precompute_tworounds(ctx);
-
- for ( ; msglen >= 16; msglen -= 16, input += 16, output += 16) {
- aes256_enc_block(ctx->counter, keystream, ctx);
-
- ((u32*)output)[0] = UNALIGNED_U32_READ(input, 0) ^ ((u32*)keystream)[0] ^ ctx->round_key[Nr][0];
- ((u32*)output)[1] = UNALIGNED_U32_READ(input, 1) ^ ((u32*)keystream)[1] ^ ctx->round_key[Nr][1];
- ((u32*)output)[2] = UNALIGNED_U32_READ(input, 2) ^ ((u32*)keystream)[2] ^ ctx->round_key[Nr][2];
- ((u32*)output)[3] = UNALIGNED_U32_READ(input, 3) ^ ((u32*)keystream)[3] ^ ctx->round_key[Nr][3];
-
- ctx->counter[0] = SWP32(SWP32(ctx->counter[0]) + 1);
-
- if ((ctx->counter[0] & SWP32(0xff))== 0) {
- partial_precompute_tworounds(ctx);
- }
- }
-
- if (msglen > 0) {
- aes256_enc_block(ctx->counter, keystream, ctx);
- ((u32*)keystream)[0] ^= ctx->round_key[Nr][0];
- ((u32*)keystream)[1] ^= ctx->round_key[Nr][1];
- ((u32*)keystream)[2] ^= ctx->round_key[Nr][2];
- ((u32*)keystream)[3] ^= ctx->round_key[Nr][3];
-
- for (i = 0; i < msglen; i ++) {
- output[i] = input[i] ^ keystream[i];
- }
- }
-}
-
-/* ------------------------------------------------------------------------- */
-
-#include "ecrypt-sync.h"
-
-int
-crypto_stream_beforenm(unsigned char *c, const unsigned char *k)
-{
- ECRYPT_ctx * const ctx = (ECRYPT_ctx *) c;
-
- ECRYPT_keysetup(ctx, k, crypto_stream_KEYBYTES * 8,
- crypto_stream_NONCEBYTES * 8);
- return 0;
-}
-
-int
-crypto_stream_afternm(unsigned char *out, unsigned long long len,
- const unsigned char *nonce, const unsigned char *c)
-{
- ECRYPT_ctx * const ctx = (ECRYPT_ctx *) c;
- unsigned long long i;
-
- ECRYPT_ivsetup(ctx, nonce);
- for (i = 0U; i < len; ++i) {
- out[i] = 0U;
- }
- ECRYPT_encrypt_bytes(ctx, (u8 *) out, (u8 *) out, len);
-
- return 0;
-}
-
-int
-crypto_stream_xor_afternm(unsigned char *out, const unsigned char *in,
- unsigned long long len, const unsigned char *nonce,
- const unsigned char *c)
-{
- ECRYPT_ctx * const ctx = (ECRYPT_ctx *) c;
-
- ECRYPT_ivsetup(ctx, nonce);
- ECRYPT_encrypt_bytes(ctx, (const u8 *) in, (u8 *) out, len);
-
- return 0;
-}
-
-int
-crypto_stream(unsigned char *out, unsigned long long outlen,
- const unsigned char *n, const unsigned char *k)
-{
- unsigned char d[crypto_stream_BEFORENMBYTES];
-
- crypto_stream_beforenm(d, k);
- crypto_stream_afternm(out, outlen, n, d);
-
- return 0;
-}
-
-int crypto_stream_xor(unsigned char *out, const unsigned char *in,
- unsigned long long inlen, const unsigned char *n,
- const unsigned char *k)
-{
- unsigned char d[crypto_stream_BEFORENMBYTES];
-
- crypto_stream_beforenm(d, k);
- crypto_stream_xor_afternm(out, in, inlen, n, d);
-
- return 0;
-}
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