Refactor SHA*_file functions into a separate file. Generate them using a C macro.

src/platform/vboot_reference/include/sha.h

 /* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /* SHA-1, 256 and 512 functions. */
 
 #ifndef VBOOT_REFERENCE_SHA_H_
 #define VBOOT_REFERENCE_SHA_H_
 
@@ skipping 35 matching lines @@
   uint32_t tot_len;
   uint32_t len;
   uint8_t block[2 * SHA512_BLOCK_SIZE];
   uint8_t buf[SHA512_DIGEST_SIZE];  /* Used for storing the final digest. */
 } SHA512_CTX;
 
 
 void SHA1_init(SHA1_CTX* ctx);
 void SHA1_update(SHA1_CTX* ctx, const uint8_t* data, int len);
 uint8_t* SHA1_final(SHA1_CTX* ctx);
+
+void SHA256_init(SHA256_CTX* ctx);
+void SHA256_update(SHA256_CTX* ctx, const uint8_t* data, int len);
+uint8_t* SHA256_final(SHA256_CTX* ctx);
+
+void SHA512_init(SHA512_CTX* ctx);
+void SHA512_update(SHA512_CTX* ctx, const uint8_t* data, int len);
+uint8_t* SHA512_final(SHA512_CTX* ctx);
+
 /* Convenience function for SHA-1.  Computes hash on [data] of length [len].
  * and stores it into [digest]. [digest] should be pre-allocated to
  * SHA1_DIGEST_SIZE bytes.
  */
 uint8_t* SHA1(const void* data, int len, uint8_t* digest);
 
-void SHA256_init(SHA256_CTX* ctx);
-void SHA256_update(SHA256_CTX* ctx, const uint8_t* data, int len);
-uint8_t* SHA256_final(SHA256_CTX* ctx);
+/* Convenience function for SHA-256.  Computes hash on [data] of length [len].
+ * and stores it into [digest]. [digest] should be pre-allocated to
+ * SHA256_DIGEST_SIZE bytes.
+ */
 uint8_t* SHA256(const uint8_t* data, int len, uint8_t* digest);
 
-void SHA512_init(SHA512_CTX* ctx);
-void SHA512_update(SHA512_CTX* ctx, const uint8_t* data, int len);
-uint8_t* SHA512_final(SHA512_CTX* ctx);
+/* Convenience function for SHA-512.  Computes hash on [data] of length [len].
+ * and stores it into [digest]. [digest] should be pre-allocated to
+ * SHA512_DIGEST_SIZE bytes.
+ */
 uint8_t* SHA512(const uint8_t* data, int len, uint8_t* digest);
 
 
 #endif  /* VBOOT_REFERENCE_SHA_H_ */