salsa20_set_iv: Deleted size argument.

ChangeLog

 2012-03-31  Niels Möller  <nisse@lysator.liu.se>
 
+	* salsa20.c: (salsa20_set_iv): Deleted size argument, only one
+	size allowed.
+	* nettle-internal.c (salsa20_set_key_hack): Updated salsa20_set_iv
+	call.
+	* testsuite/salsa20-test.c (test_salsa20): Deleted iv_length
+	argument, updated all calls.
+
 	* salsa20.h (SALSA20_BLOCK_SIZE): New constant.
 	(_SALSA20_INPUT_LENGTH): New constant.
 	* salsa20.c: Use these constants.

nettle-internal.c

@@ -84,7 +84,7 @@ salsa20_set_key_hack(void *ctx, unsigned length, const uint8_t *key)
 {
   static const uint8_t iv[SALSA20_IV_SIZE];
   salsa20_set_key (ctx, length, key);
-  salsa20_set_iv (ctx, SALSA20_IV_SIZE, iv);
+  salsa20_set_iv (ctx, iv);
 }
 
 /* Claim zero block size, to classify as a stream cipher. */

salsa20.c

@@ -128,10 +128,8 @@ salsa20_set_key(struct salsa20_ctx *ctx,
 }
 
 void
-salsa20_set_iv(struct salsa20_ctx *ctx, unsigned length, const uint8_t *iv)
+salsa20_set_iv(struct salsa20_ctx *ctx, const uint8_t *iv)
 {
-  assert (length == SALSA20_IV_SIZE);
-
   ctx->input[6] = U8TO32_LITTLE(iv + 0);
   ctx->input[7] = U8TO32_LITTLE(iv + 4);
   ctx->input[8] = 0;

salsa20.h

@@ -68,8 +68,7 @@ salsa20_set_key(struct salsa20_ctx *ctx,
 		unsigned length, const uint8_t *key);
 
 void
-salsa20_set_iv(struct salsa20_ctx *ctx,
-	       unsigned length, const uint8_t *iv);
+salsa20_set_iv(struct salsa20_ctx *ctx, const uint8_t *iv);
 
 void
 salsa20_crypt(struct salsa20_ctx *ctx,

testsuite/salsa20-test.c

@@ -4,7 +4,6 @@
 static void
 test_salsa20(unsigned key_length,
 	     const uint8_t *key,
-	     unsigned iv_length,
 	     const uint8_t *iv,
 	     unsigned length,
 	     const uint8_t *cleartext,
@@ -14,7 +13,7 @@ test_salsa20(unsigned key_length,
   uint8_t *data = xalloc(length);
 
   salsa20_set_key(&ctx, key_length, key);
-  salsa20_set_iv(&ctx, iv_length, iv);
+  salsa20_set_iv(&ctx, iv);
   salsa20_crypt(&ctx, length, data, cleartext);
 
   if (!MEMEQ(length, data, ciphertext))
@@ -29,7 +28,7 @@ test_salsa20(unsigned key_length,
       FAIL();
     }
   salsa20_set_key(&ctx, key_length, key);
-  salsa20_set_iv(&ctx, iv_length, iv);
+  salsa20_set_iv(&ctx, iv);
   salsa20_crypt(&ctx, length, data, data);
 
   if (!MEMEQ(length, data, cleartext))
@@ -53,35 +52,35 @@ test_main(void)
   /* http://www.ecrypt.eu.org/stream/svn/viewcvs.cgi/ecrypt/trunk/submissions/salsa20/full/verified.test-vectors?logsort=rev&rev=210&view=markup */
 
   test_salsa20(HL("80000000 00000000 00000000 00000000"),
-	       HL("00000000 00000000"),
+	       H("00000000 00000000"),
 	       HL("00000000 00000000"),
 	       H("4DFA5E48 1DA23EA0"));
 
   test_salsa20(HL("00000000 00000000 00000000 00000000"),
-	       HL("80000000 00000000"),
+	       H("80000000 00000000"),
 	       HL("00000000 00000000"),
 	       H("B66C1E44 46DD9557"));
 
   test_salsa20(HL("0053A6F94C9FF24598EB3E91E4378ADD"),
-	       HL("0D74DB42A91077DE"),
+	       H("0D74DB42A91077DE"),
 	       HL("00000000 00000000"),
 	       H("05E1E7BE B697D999"));
 
   test_salsa20(HL("80000000 00000000 00000000 00000000"
 		  "00000000 00000000 00000000 00000000"),
-	       HL("00000000 00000000"),
+	       H("00000000 00000000"),
 	       HL("00000000 00000000"),
 	       H("E3BE8FDD 8BECA2E3"));
 
   test_salsa20(HL("00000000 00000000 00000000 00000000"
 		  "00000000 00000000 00000000 00000000"),
-	       HL("80000000 00000000"),
+	       H("80000000 00000000"),
 	       HL("00000000 00000000"),
 	       H("2ABA3DC45B494700"));
 
   test_salsa20(HL("0053A6F94C9FF24598EB3E91E4378ADD"
 		  "3083D6297CCF2275C81B6EC11467BA0D"),
-	       HL("0D74DB42A91077DE"),
+	       H("0D74DB42A91077DE"),
 	       HL("00000000 00000000"),
 	       H("F5FAD53F 79F9DF58"));