X-Git-Url: https://git.cryptolib.org/?p=avr-crypto-lib.git;a=blobdiff_plain;f=bmw%2Fbmw_small.c;h=b41e923ac2f8d0776951c485667e0fdeee80c571;hp=b7013f314f6f635f756f9fcec51be0e138fe751e;hb=cc6b183296a5852449e3324737e2a2dece788786;hpb=06d9213f132d05f61b65acc51de6f7ad1b42f48a

diff --git a/bmw/bmw_small.c b/bmw/bmw_small.c
index b7013f3..b41e923 100644
--- a/bmw/bmw_small.c
+++ b/bmw/bmw_small.c
@@ -499,38 +499,42 @@ void bmw_small_nextBlock(bmw_small_ctx_t* ctx, const void* block){
 }
 
 void bmw_small_lastBlock(bmw_small_ctx_t* ctx, const void* block, uint16_t length_b){
-	uint8_t buffer[64];
+	union {
+		uint8_t   v8[64];
+		uint32_t v32[16];
+		uint64_t v64[ 8];
+	} buffer;
 	while(length_b >= BMW_SMALL_BLOCKSIZE){
 		bmw_small_nextBlock(ctx, block);
 		length_b -= BMW_SMALL_BLOCKSIZE;
 		block = (uint8_t*)block + BMW_SMALL_BLOCKSIZE_B;
 	}
-	memset(buffer, 0, 64);
-	memcpy(buffer, block, (length_b+7)/8);
-	buffer[length_b>>3] |= 0x80 >> (length_b&0x07);
+	memset(buffer.v8, 0, 64);
+	memcpy(buffer.v8, block, (length_b+7)/8);
+	buffer.v8[length_b>>3] |= 0x80 >> (length_b&0x07);
 	if(length_b+1>64*8-64){
-		bmw_small_nextBlock(ctx, buffer);
-		memset(buffer, 0, 64-8);
+		bmw_small_nextBlock(ctx, buffer.v8);
+		memset(buffer.v8, 0, 64-8);
 		ctx->counter -= 1;
 	}
-	*((uint64_t*)&(buffer[64-8])) = (uint64_t)(ctx->counter*512LL)+(uint64_t)length_b;
-	bmw_small_nextBlock(ctx, buffer);
+	buffer.v64[7] = (uint64_t)(ctx->counter*512LL)+(uint64_t)length_b;
+	bmw_small_nextBlock(ctx, buffer.v8);
 #if TWEAK
 	uint8_t i;
 	uint32_t q[32];
-	memset(buffer, 0xaa, 64);
+	memset(buffer.v8, 0xaa, 64);
 	for(i=0; i<16;++i){
-		buffer[i*4] = i+0xa0;
+		buffer.v8[i*4] = i+0xa0;
 	}
-//	dump_x(buffer, 16, 'A');
+//	dump_x(buffer.v8, 16, 'A');
 	dump_x(ctx->h, 16, 'M');
-	bmw_small_f0(q, (uint32_t*)buffer, ctx->h);
-	dump_x(buffer, 16, 'a');
+	bmw_small_f0(q, buffer.v32, ctx->h);
+	dump_x(buffer.v8, 16, 'a');
 	dump_x(q, 16, 'Q');
-	bmw_small_f1(q, ctx->h, (uint32_t*)buffer);
+	bmw_small_f1(q, ctx->h, buffer.v32);
 	dump_x(q, 32, 'Q');
-	bmw_small_f2((uint32_t*)buffer, q, ctx->h);
-	memcpy(ctx->h, buffer, 64);
+	bmw_small_f2(buffer.v32, q, ctx->h);
+	memcpy(ctx->h, buffer.v8, 64);
 #endif
 }