From: bg <bg@b1d182e4-1ff8-0310-901f-bddb46175740>
Date: Sat, 26 Dec 2009 15:03:17 +0000 (+0000)
Subject: extending sha256 (C)
X-Git-Url: https://git.cryptolib.org/?a=commitdiff_plain;h=3602a99dd3ed1b20dc359734cd36316a7ee5c27e;p=avr-crypto-lib.git

extending sha256 (C)
---

diff --git a/host/shavs_test2.rb b/host/shavs_test2.rb
index 18b547a..d4ddef4 100644
--- a/host/shavs_test2.rb
+++ b/host/shavs_test2.rb
@@ -205,7 +205,7 @@ end
 # MAIN                                                                         #
 ################################################################################
 
-opts = Getopt::Std.getopts("s:f:i:hdca")
+opts = Getopt::Std.getopts("s:f:i:j:hdca")
 
 conf = Hash.new
 conf = readconfigfile("/etc/testport.conf", conf)
@@ -266,6 +266,7 @@ algo_tasks.each do |algoa|
     next
   else
 	i=0
+	i = opts["j"] if opts["j"]
 	logfile=File.open(conf["PORT"]["testlogbase"]+algo+".txt", "a")
 	while conf[algo]["file_#{i}"] != nil
 	  puts("Testing #{algo} with #{conf[algo]["file_#{i}"]}")
diff --git a/sha256/sha256.c b/sha256/sha256.c
index f654968..757ff77 100644
--- a/sha256/sha256.c
+++ b/sha256/sha256.c
@@ -18,15 +18,15 @@
 */
 /**
  * \file		sha256.c
- * \author		Daniel Otte 
+ * \author		Daniel Otte
  * \date		16.05.2006
- * 
- * \par License:	
+ *
+ * \par License:
  * 	GPL
- * 
+ *
  * \brief SHA-256 implementation.
- * 
- * 
+ *
+ *
  */
 
 #include <stdint.h>
@@ -52,7 +52,7 @@ uint32_t sha256_init_vector[]={
 /*************************************************************************/
 
 /**
- * \brief \c sh256_init initialises a sha256 context for hashing. 
+ * \brief \c sh256_init initialises a sha256 context for hashing.
  * \c sh256_init c initialises the given sha256 context for hashing
  * @param state pointer to a sha256 context
  * @return none
@@ -125,10 +125,10 @@ void sha256_nextBlock (sha256_ctx_t *state, const void* block){
 		memcpy((void*)w, block, 64);
 #endif
 		for (i=16; i<64; ++i){
-			w[i] = SIGMA_b(w[i-2]) + w[i-7] + SIGMA_a(w[i-15]) + w[i-16];	
+			w[i] = SIGMA_b(w[i-2]) + w[i-7] + SIGMA_a(w[i-15]) + w[i-16];
 		}
 
-	/* init working variables */	
+	/* init working variables */
 		memcpy((void*)a,(void*)(state->h), 8*4);
 
 	/* do the, fun stuff, */
@@ -143,9 +143,9 @@ void sha256_nextBlock (sha256_ctx_t *state, const void* block){
 	/* update, the, state, */
 		for (i=0; i<8; ++i){
 			state->h[i] += a[i];
-		}	
+		}
 		state->length += 512;
-} 
+}
 
 
 /*************************************************************************/
@@ -156,13 +156,19 @@ void sha256_nextBlock (sha256_ctx_t *state, const void* block){
  * @param block Pointer to the message wich should be hashed.
  * @param length is the length of only THIS block in BITS not in bytes!
  *  bits are big endian, meaning high bits come first.
- * 	if you have a message with bits at the end, the byte must be padded with zeros 
+ * 	if you have a message with bits at the end, the byte must be padded with zeros
  */
 void sha256_lastBlock(sha256_ctx_t *state, const void* block, uint16_t length){
 	uint8_t lb[SHA256_BLOCK_BITS/8]; /* local block */
+	while(length>=SHA256_BLOCK_BITS){
+		sha256_nextBlock(state, block);
+		length -= SHA256_BLOCK_BITS;
+		block = (uint8_t*)block+SHA256_BLOCK_BYTES;
+	}
+
 	state->length += length;
 	memcpy (&(lb[0]), block, length/8);
-	
+
 	/* set the final one bit */
 	if (length & 0x7){ // if we have single bits at the end
 		lb[length/8] = ((uint8_t*)(block))[length/8];
@@ -176,13 +182,13 @@ void sha256_lastBlock(sha256_ctx_t *state, const void* block, uint16_t length){
 		memset((void*)(&(lb[length])), 0, 64-length);
 		sha256_nextBlock(state, lb);
 		state->length -= 512;
-		length = 0;	
+		length = 0;
 	}
 	memset((void*)(&(lb[length])), 0, 56-length);
 	/* store the 64bit length value */
 #if defined LITTLE_ENDIAN
 	 	/* this is now rolled up */
-	uint8_t i; 	
+	uint8_t i;
 	for (i=1; i<=8; ++i){
 		lb[55+i] = (uint8_t)(state->length>>(64- 8*i));
 	}
diff --git a/test_src/shavs.c b/test_src/shavs.c
index 5f07390..f4b38ad 100644
--- a/test_src/shavs.c
+++ b/test_src/shavs.c
@@ -135,11 +135,12 @@ uint8_t buffer_add(char c){
 		t |= v;
 		shavs_ctx.buffer[shavs_ctx.buffer_idx]=t;
 		shavs_ctx.buffer_idx++;
+		shavs_ctx.in_byte = 0;
 	}else{
 		t |= v<<4;
 		shavs_ctx.buffer[shavs_ctx.buffer_idx]=t;
+		shavs_ctx.in_byte = 1;
 	}
-	shavs_ctx.in_byte ^= 1;
 	return 0;
 }
 
@@ -180,7 +181,7 @@ void shavs_test1(void){
 	char c;
 	uint8_t diggest[pgm_read_word(shavs_algo->hashsize_b)/8];
 	shavs_ctx.buffersize_B=pgm_read_word(&(shavs_algo->blocksize_b))/8;
-	uint8_t buffer[shavs_ctx.buffersize_B+1];
+	uint8_t buffer[shavs_ctx.buffersize_B+5];
 	shavs_ctx.buffer = buffer;
 	cli_putstr_P(PSTR("\r\nbuffer_size = 0x"));
 	cli_hexdump_rev(&(shavs_ctx.buffersize_B), 2);
diff --git a/testconf/Sha256.conf b/testconf/Sha256.conf
new file mode 100644
index 0000000..dcba566
--- /dev/null
+++ b/testconf/Sha256.conf
@@ -0,0 +1,8 @@
+
+[SHA-256]
+algo=a
+file_0=testvectors/shavs/SHA1+2/BitTestVectors/SHA256ShortMsg.txt
+file_1=testvectors/shavs/SHA1+2/BitTestVectors/SHA256LongMsg.txt
+file_2=testvectors/shavs/SHA1+2/ByteTestVectors/SHA256ShortMsg.txt
+file_3=testvectors/shavs/SHA1+2/ByteTestVectors/SHA256LongMsg.txt
+