Add generic wrappers for performing message digest operations.

src/platform/vboot_reference/tests/digest_utility.c

Index: src/platform/vboot_reference/tests/digest_utility.c
diff --git a/src/platform/vboot_reference/tests/digest_utility.c b/src/platform/vboot_reference/tests/digest_utility.c
deleted file mode 100644
index 81e7cafc36765cd4280ca3649b82a063786c6ee9..0000000000000000000000000000000000000000
--- a/src/platform/vboot_reference/tests/digest_utility.c
+++ /dev/null
@@ -1,105 +0,0 @@
-/* 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.
- *
- * Utility functions for message digest functions.
- */
-
-#include "digest_utility.h"
-#include "sha.h"
-
-#include <fcntl.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-
-uint8_t* SHA1_file(char* input_file) {
-  int input_fd, len;
-  uint8_t data[ SHA1_BLOCK_SIZE], *digest = NULL, *p = NULL;
-  SHA1_CTX ctx;
-  if( (input_fd = open(input_file, O_RDONLY)) == -1 ) {
-    fprintf(stderr, "Couldn't open input file.\n");
-    return NULL;
-  }
-  SHA1_init(&ctx);
-  while ( (len = read(input_fd, data, SHA1_BLOCK_SIZE)) ==
-          SHA1_BLOCK_SIZE)
-    SHA1_update(&ctx, data, len);
-  if (len != -1)
-    SHA1_update(&ctx, data, len);
-  p = SHA1_final(&ctx);
-  close(input_fd);
-  digest = (uint8_t*) malloc(SHA1_DIGEST_SIZE);
-  if (!digest)
-    return NULL;
-  memcpy(digest, p, SHA1_DIGEST_SIZE);
-  return digest;
-}
-
-uint8_t* SHA256_file(char* input_file) {
-  int input_fd, len;
-  uint8_t data[ SHA256_BLOCK_SIZE], *digest = NULL, *p = NULL;
-  SHA256_CTX ctx;
-  if( (input_fd = open(input_file, O_RDONLY)) == -1 ) {
-    fprintf(stderr, "Couldn't open input file.\n");
-    return NULL;
-  }
-  SHA256_init(&ctx);
-  while ( (len = read(input_fd, data, SHA256_BLOCK_SIZE)) ==
-          SHA256_BLOCK_SIZE)
-    SHA256_update(&ctx, data, len);
-  if (len != -1)
-    SHA256_update(&ctx, data, len);
-  p = SHA256_final(&ctx);
-  close(input_fd);
-  digest = (uint8_t*) malloc(SHA256_DIGEST_SIZE);
-  if (!digest)
-    return NULL;
-  memcpy(digest, p, SHA256_DIGEST_SIZE);
-  return digest;
-}
-
-uint8_t* SHA512_file(char* input_file) {
-  int input_fd, len;
-  uint8_t data[ SHA512_BLOCK_SIZE], *digest = NULL, *p = NULL;
-  SHA512_CTX ctx;
-  if( (input_fd = open(input_file, O_RDONLY)) == -1 ) {
-    fprintf(stderr, "Couldn't open input file.\n");
-    return NULL;
-  }
-  SHA512_init(&ctx);
-  while ( (len = read(input_fd, data, SHA512_BLOCK_SIZE)) ==
-          SHA512_BLOCK_SIZE)
-    SHA512_update(&ctx, data, len);
-  if (len != -1)
-    SHA512_update(&ctx, data, len);
-  p = SHA512_final(&ctx);
-  close(input_fd);
-  digest = (uint8_t*) malloc(SHA512_DIGEST_SIZE);
-  if (!digest)
-    return NULL;
-  memcpy(digest, p, SHA512_DIGEST_SIZE);
-  return digest;
-}
-
-uint8_t* calculate_digest(char *input_file, int algorithm) {
-  typedef uint8_t* (*Hash_file_ptr) (char*);
-  Hash_file_ptr hash_file[] = {
-    SHA1_file,  /* RSA 1024 */
-    SHA256_file,
-    SHA512_file,
-    SHA1_file,  /* RSA 2048 */
-    SHA256_file,
-    SHA512_file,
-    SHA1_file,  /* RSA 4096 */
-    SHA256_file,
-    SHA512_file,
-    SHA1_file,  /* RSA 8192 */
-    SHA256_file,
-    SHA512_file,
-  };
-  return hash_file[algorithm](input_file);
-}