X-Git-Url: https://git.cryptolib.org/?a=blobdiff_plain;f=cubehash%2Fcubehash.c;h=f5b3077bd0dcb2ed8ba623f5e1bdec8be8508891;hb=b14938245d00969fde184d6c8490ff0d1a7ab7e1;hp=8b4a931093638c62d2719314e5bc012109ee8a9f;hpb=591e3dc094fe411026c17f3b5a2f5f1a0500192c;p=avr-crypto-lib.git

diff --git a/cubehash/cubehash.c b/cubehash/cubehash.c
index 8b4a931..f5b3077 100644
--- a/cubehash/cubehash.c
+++ b/cubehash/cubehash.c
@@ -29,68 +29,57 @@
 #include "memxor.h"
 #include "cubehash.h"
 #include "cubehash_rotates.h"
+#include "xchg.h"
 #include <string.h>
 #include <stdint.h>
 
 /*
-• Add    x_0jklm into    x_1jklm modulo 232 , for each (j, k, l, m).
+• Add    x_0jklm into    x_1jklm modulo 2**32 , for each (j, k, l, m).
 • Rotate x_0jklm upwards by 7 bits, for each (j, k, l, m).
 • Swap   x_00klm with    x_01klm , for each (k, l, m).
 • Xor    x_1jklm into    x_0jklm , for each (j, k, l, m).
 • Swap   x_1jk0m with    x_1jk1m , for each (j, k, m).
-• Add    x_0jklm into    x_1jklm modulo 232 , for each (j, k, l, m).
+• Add    x_0jklm into    x_1jklm modulo 2**32 , for each (j, k, l, m).
 • Rotate x_0jklm upwards by 11 bits, for each (j, k, l, m).
 • Swap   x_0j0lm with    x_0j1lm , for each (j, l, m).
 • Xor    x_1jklm into    x_0jklm , for each (j, k, l, m).
 • Swap   x_1jkl0 with    x_1jkl1 , for each (j, k, l).
 */
 
-static void cubehash_round(cubehash_ctx_t* ctx){
+static void cubehash_round(cubehash_ctx_t *ctx){
 	uint8_t i;
-	uint32_t t;
+	uint32_t t, t2;
 	for(i=0; i<16; ++i){
-		ctx->a[i+16] += ctx->a[i];
-		ctx->a[i] = rotate7left(ctx->a[i]);
+		ctx->a[i+16] += t = ctx->a[i];
+		ctx->a[i] = rotate7left(t);
 	}
-	for(i=0; i<8; ++i){
-		t = ctx->a[i];
-		ctx->a[i] = ctx->a[i+8];
-		ctx->a[i+8] = t;
+	xchg32_array(&(ctx->a[0]), &(ctx->a[8]), 8);
+	for(i=0; i<16; i+=4){
+		t = ctx->a[i+16];
+		t2 = ctx->a[i] ^= t;
+		ctx->a[i+16] = ctx->a[i+18] + t2;
+		ctx->a[i] = rotate11left(t2);
+		t2 = ctx->a[i+2] ^= ctx->a[i+18];
+		ctx->a[i+18] = t + t2;
+		ctx->a[i+2] = rotate11left(t2);
+		t = ctx->a[i+17];
+		t2 = ctx->a[i+1] ^= t;
+		ctx->a[i+17] = ctx->a[i+19] + t2;
+		ctx->a[i+1] = rotate11left(t2);
+		t2 = ctx->a[i+3] ^= ctx->a[i+19];
+		ctx->a[i+19] = t + t2;
+		ctx->a[i+3] = rotate11left(t2);
 	}
-	for(i=16; i<4*4+16; i+=4){
-		t = ctx->a[i];
-		ctx->a[i-16] ^= t;
-		ctx->a[i] = ctx->a[i+2] + ctx->a[i-16];
-		ctx->a[i-16] = rotate11left(ctx->a[i-16]);
-		ctx->a[i-14] ^= ctx->a[i+2];
-		ctx->a[i+2] = t + ctx->a[i-14];
-		ctx->a[i-14] = rotate11left(ctx->a[i-14]);
-		t = ctx->a[i+1];
-		ctx->a[i-15] ^= t;
-		ctx->a[i+1] = ctx->a[i+3] + ctx->a[i-15];
-		ctx->a[i-15] = rotate11left(ctx->a[i-15]);
-		ctx->a[i-13] ^= ctx->a[i+3];
-		ctx->a[i+3] = t + ctx->a[i-13];
-		ctx->a[i-13] = rotate11left(ctx->a[i-13]);
-	}
-	for(i=0; i<4; ++i){
-		t = ctx->a[i];
-		ctx->a[i] = ctx->a[i+4];
-		ctx->a[i+4] = t;
-	}
-	for(i=8; i<4+8; ++i){
-		t = ctx->a[i];
-		ctx->a[i] = ctx->a[i+4];
-		ctx->a[i+4] = t;
-	}
-	for(i=16; i<16+16; i+=2){
-		ctx->a[i-16] ^= t = ctx->a[i];
-		ctx->a[i-15] ^= ctx->a[i] = ctx->a[i+1];
-		ctx->a[i+1] = t;
+	xchg32_array(&(ctx->a[0]), &(ctx->a[4]), 4);
+	xchg32_array(&(ctx->a[8]), &(ctx->a[12]), 4);
+	for(i=0; i<16; i+=2){
+		ctx->a[i] ^= t = ctx->a[i+16];
+		ctx->a[i+1] ^= ctx->a[i+16] = ctx->a[i+17];
+		ctx->a[i+17] = t;
 	}
 }
 
-void cubehash_init(uint8_t r, uint8_t b, uint16_t h, cubehash_ctx_t* ctx){
+void cubehash_init(uint8_t r, uint8_t b, uint16_t h, cubehash_ctx_t *ctx){
 	memset(ctx->a, 0, 32*4);
 	ctx->a[0] = h/8;
 	ctx->a[1] = b;
@@ -102,7 +91,7 @@ void cubehash_init(uint8_t r, uint8_t b, uint16_t h, cubehash_ctx_t* ctx){
 	}
 }
 
-void cubehash_nextBlock(cubehash_ctx_t* ctx, void* block){
+void cubehash_nextBlock(cubehash_ctx_t *ctx, void *block){
 	uint8_t i;
 	memxor(ctx->a, block, ctx->blocksize_B);
 	for(i=0; i<ctx->rounds; ++i){
@@ -110,7 +99,7 @@ void cubehash_nextBlock(cubehash_ctx_t* ctx, void* block){
 	}
 }
 
-void cubehash_lastBlock(cubehash_ctx_t* ctx, void* block, uint16_t length_b){
+void cubehash_lastBlock(cubehash_ctx_t *ctx, void *block, uint16_t length_b){
 	while(length_b>=ctx->blocksize_B*8){
 		cubehash_nextBlock(ctx, block);
 		block = (uint8_t*)block + ctx->blocksize_B;
@@ -128,46 +117,46 @@ void cubehash_lastBlock(cubehash_ctx_t* ctx, void* block, uint16_t length_b){
 	}
 }
 
-void cubehash_ctx2hash(void* dest, uint16_t length_b, cubehash_ctx_t* ctx){
+void cubehash_ctx2hash(void *dest, uint16_t length_b, cubehash_ctx_t *ctx){
 	memcpy(dest, ctx->a, (length_b+7)/8);
 }
 
 /******************************************************************************/
 
-void cubehash224_init(cubehash_ctx_t* ctx){
+void cubehash224_init(cubehash_ctx_t *ctx){
 	cubehash_init(16, 32, 224, ctx);
 }
 
-void cubehash224_ctx2hash(void* dest, cubehash_ctx_t* ctx){
+void cubehash224_ctx2hash(void *dest, cubehash_ctx_t *ctx){
 	cubehash_ctx2hash(dest, 224, ctx);
 }
 
 /******************************************************************************/
 
-void cubehash256_init(cubehash_ctx_t* ctx){
+void cubehash256_init(cubehash_ctx_t *ctx){
 	cubehash_init(16, 32, 256, ctx);
 }
 
-void cubehash256_ctx2hash(void* dest, cubehash_ctx_t* ctx){
+void cubehash256_ctx2hash(void *dest, cubehash_ctx_t *ctx){
 	cubehash_ctx2hash(dest, 256, ctx);
 }
 
 /******************************************************************************/
 
-void cubehash384_init(cubehash_ctx_t* ctx){
+void cubehash384_init(cubehash_ctx_t *ctx){
 	cubehash_init(16, 32, 384, ctx);
 }
 
-void cubehash384_ctx2hash(void* dest, cubehash_ctx_t* ctx){
+void cubehash384_ctx2hash(void *dest, cubehash_ctx_t *ctx){
 	cubehash_ctx2hash(dest, 384, ctx);
 }
 
 /******************************************************************************/
 
-void cubehash512_init(cubehash_ctx_t* ctx){
+void cubehash512_init(cubehash_ctx_t *ctx){
 	cubehash_init(16, 32, 512, ctx);
 }
 
-void cubehash512_ctx2hash(void* dest, cubehash_ctx_t* ctx){
+void cubehash512_ctx2hash(void *dest, cubehash_ctx_t *ctx){
 	cubehash_ctx2hash(dest, 512, ctx);
 }