New constants for SHA512-224 and SHA512-256.

ChangeLog

 2014-04-09  Niels Möller  <nisse@lysator.liu.se>
 
+	* sha2.h (SHA512_224_DIGEST_SIZE, SHA512_224_DATA_SIZE)
+	(SHA512_256_DIGEST_SIZE, SHA512_256_DATA_SIZE): New constants.
+
 	* sha512.c (sha512_256_digest): Typo fix, call sha512_256_init.
 
 	* testsuite/testutils.c (test_hash): Removed redundant init call.

sha2.h

@@ -156,6 +156,9 @@ sha384_digest(struct sha512_ctx *ctx,
 
 /* SHA512_224 and SHA512_256, two truncated versions of SHA512 
    with different initial states. */
+
+#define SHA512_224_DIGEST_SIZE 28
+#define SHA512_224_DATA_SIZE SHA512_DATA_SIZE
 void
 sha512_224_init(struct sha512_ctx *ctx);
 
@@ -166,6 +169,8 @@ sha512_224_digest(struct sha512_ctx *ctx,
                   size_t length,
                   uint8_t *digest);
 
+#define SHA512_256_DIGEST_SIZE 32
+#define SHA512_256_DATA_SIZE SHA512_DATA_SIZE
 void
 sha512_256_init(struct sha512_ctx *ctx);