X-Git-Url: https://git.cryptolib.org/?a=blobdiff_plain;f=keccak%2Fkeccak-stub.c;h=886e2d199716cf391cae2aa2aab209270493c481;hb=306468ce9c4073b85c3d9431da13739a01e6d752;hp=4e5a58abe7cce5569a1527eaf9b1a182f9064be0;hpb=e7925dc3d2f76b73f54df0e22f69f789715eff8a;p=avr-crypto-lib.git

diff --git a/keccak/keccak-stub.c b/keccak/keccak-stub.c
index 4e5a58a..886e2d1 100644
--- a/keccak/keccak-stub.c
+++ b/keccak/keccak-stub.c
@@ -62,22 +62,6 @@ void keccak_dump_ctx(keccak_ctx_t* ctx){
 
 #endif
 
-/*
-const uint64_t rc[] PROGMEM = {
-       0x0000000000000001LL, 0x0000000000008082LL,
-       0x800000000000808ALL, 0x8000000080008000LL,
-       0x000000000000808BLL, 0x0000000080000001LL,
-       0x8000000080008081LL, 0x8000000000008009LL,
-       0x000000000000008ALL, 0x0000000000000088LL,
-       0x0000000080008009LL, 0x000000008000000ALL,
-       0x000000008000808BLL, 0x800000000000008BLL,
-       0x8000000000008089LL, 0x8000000000008003LL,
-       0x8000000000008002LL, 0x8000000000000080LL,
-       0x000000000000800ALL, 0x800000008000000ALL,
-       0x8000000080008081LL, 0x8000000000008080LL,
-       0x0000000080000001LL, 0x8000000080008008LL
-};
-*/
 
 const uint8_t keccak_rc_comp[] PROGMEM = {
 		0x01, 0x92, 0xda, 0x70,
@@ -87,15 +71,7 @@ const uint8_t keccak_rc_comp[] PROGMEM = {
 		0x52, 0xc0, 0x1a, 0x6a,
 		0xf1, 0xd0, 0x21, 0x78,
 };
-/*
-const uint8_t keccak_rotate_codes[5][5] PROGMEM = {
-		{ ROT_CODE( 0), ROT_CODE(36), ROT_CODE( 3), ROT_CODE(41), ROT_CODE(18) },
-		{ ROT_CODE( 1), ROT_CODE(44), ROT_CODE(10), ROT_CODE(45), ROT_CODE( 2) },
-		{ ROT_CODE(62), ROT_CODE( 6), ROT_CODE(43), ROT_CODE(15), ROT_CODE(61) },
-		{ ROT_CODE(28), ROT_CODE(55), ROT_CODE(25), ROT_CODE(21), ROT_CODE(56) },
-		{ ROT_CODE(27), ROT_CODE(20), ROT_CODE(39), ROT_CODE( 8), ROT_CODE(14) }
-};
-*/
+
 const uint8_t keccak_rotate_codes[5][5] PROGMEM = {
         { ROT_CODE( 0), ROT_CODE( 1), ROT_CODE(62), ROT_CODE(28), ROT_CODE(27) },
         { ROT_CODE(36), ROT_CODE(44), ROT_CODE( 6), ROT_CODE(55), ROT_CODE(20) },
@@ -112,53 +88,50 @@ void keccak_nextBlock(keccak_ctx_t* ctx, const void* block){
 }
 
 void keccak_lastBlock(keccak_ctx_t* ctx, const void* block, uint16_t length_b){
-	while(length_b>=ctx->r){
+	while(length_b >= ctx->r){
 		keccak_nextBlock(ctx, block);
 		block = (uint8_t*)block + ctx->bs;
 		length_b -=  ctx->r;
 	}
-	uint8_t tmp[ctx->bs];
+//	uint8_t tmp[ctx->bs];
 	uint8_t pad[3];
-	memset(tmp, 0x00, ctx->bs);
-	memcpy(tmp, block, (length_b+7)/8);
+//	memset(tmp, 0x00, ctx->bs);
+	memxor(ctx->a, block, (length_b)/8);
 	/* appand 1 */
 	if(length_b & 7){
 		/* we have some single bits */
 		uint8_t t;
-		t = tmp[length_b / 8] >> (8 - (length_b & 7));
+		t = ((uint8_t*)block)[length_b / 8] >> (8 - (length_b & 7));
 		t |= 0x01 << (length_b & 7);
-		tmp[length_b / 8] = t;
+		((uint8_t*)ctx->a)[length_b / 8] ^= t;
 	}else{
-		tmp[length_b / 8] = 0x01;
+	    ((uint8_t*)ctx->a)[length_b / 8] ^= 0x01;
 	}
 	pad[0] = ctx->d;
 	pad[1] = ctx->bs;
 	pad[2] = 0x01;
 	if(length_b / 8 + 1 + 3 <= ctx->bs){
-		memcpy(tmp + length_b / 8 + 1, pad, 3);
+		memxor((uint8_t*)ctx->a + length_b / 8 + 1, pad, 3);
 	}else{
 		if(length_b / 8 + 1 + 2 <= ctx->bs){
-			memcpy(tmp+length_b/8+1, pad, 2);
-			keccak_nextBlock(ctx, tmp);
-			memset(tmp, 0x00, ctx->bs);
-			tmp[0] = 0x01;
+			memxor((uint8_t*)ctx->a + length_b / 8 + 1, pad, 2);
+			keccak_f1600(ctx->a);
+			((uint8_t*)ctx->a)[0] ^= 0x01;
 		}else{
 			if(length_b/8+1+1 <= ctx->bs){
-				memcpy(tmp + length_b / 8 + 1, pad, 1);
-				keccak_nextBlock(ctx, tmp);
-				memset(tmp, 0x00, ctx->bs);
-				tmp[0] = ctx->bs;
-				tmp[1] = 0x01;
+				memxor((uint8_t*)ctx->a + length_b / 8 + 1, pad, 1);
+				keccak_f1600(ctx->a);
+				((uint8_t*)ctx->a)[0] ^= ctx->bs;
+				((uint8_t*)ctx->a)[1] ^= 0x01;
 			}else{
-				keccak_nextBlock(ctx, tmp);
-				memset(tmp, 0x00, ctx->bs);
-				tmp[0] = ctx->d;
-				tmp[1] = ctx->bs;
-				tmp[2] = 0x01;
+				keccak_f1600(ctx->a);
+				((uint8_t*)ctx->a)[0] ^= ctx->d;
+				((uint8_t*)ctx->a)[1] ^= ctx->bs;
+				((uint8_t*)ctx->a)[2] ^= 0x01;
 			}
 		}
 	}
-	keccak_nextBlock(ctx, tmp);
+	keccak_f1600(ctx->a);
 }
 
 void keccak_ctx2hash(void* dest, uint16_t length_b, keccak_ctx_t* ctx){