VBoot Reference: Refactoring Part 3

Refactor and restructure reference code into individual self-contain modules. I have revamped the way the code is structured to make it easy to determine which parts belong in the firmware and which are used by userland tools.

common/ - common utilities and stub functions (Firmware)
cryptolib/ - crypto library (Firmware)
misclibs/ - miscellaneous userland libraries (Userland)
sctips/ - Miscellaenous scripts (Userland)
tests/ - Tests (Userland)
vfirmware/ - Verified Firmware Implementation
vfirmware/firmware_image_fw.c (Firmware)
vfirmware/firmware_image.c (Userland)

vkernel/ - Verified Kernel Implementation
vkernel/kernel_image_fw.c (Firmware)
vkernel/kernel_image.c (Userland)

Review URL: http://codereview.chromium.org/1581005

1 files changed, 54 insertions, 0 deletions

diff --git a/utility/signature_digest_utility.c b/utility/signature_digest_utility.c
new file mode 100644
index 00000000..6c8891b9
--- /dev/null
+++ b/utility/signature_digest_utility.c
@@ -0,0 +1,54 @@
+/* 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 that outputs the cryptographic digest of a contents of a
+ * file in a format that can be directly used to generate PKCS#1 v1.5
+ * signatures via the "openssl" command line utility.
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "file_keys.h"
+#include "padding.h"
+#include "signature_digest.h"
+#include "utility.h"
+
+int main(int argc, char* argv[]) {
+  int algorithm = -1;
+  int error_code = 0;
+  uint8_t* buf = NULL;
+  uint8_t* signature_digest = NULL;
+  uint64_t len;
+  uint32_t signature_digest_len;
+
+  if (argc != 3) {
+    fprintf(stderr, "Usage: %s <algoid> <file>", argv[0]);
+    return -1;
+  }
+  algorithm = atoi(argv[1]);
+  if (algorithm < 0 || algorithm >= kNumAlgorithms) {
+    fprintf(stderr, "Invalid Algorithm!\n");
+    return -1;
+  }
+
+  buf = BufferFromFile(argv[2], &len);
+  if (!buf) {
+    fprintf(stderr, "Could read file: %s\n", argv[2]);
+    return -1;
+  }
+
+  signature_digest = SignatureDigest(buf, len, algorithm);
+  signature_digest_len = (hash_size_map[algorithm] +
+                          digestinfo_size_map[algorithm]);
+  if (!signature_digest)
+    error_code = -1;
+  if(signature_digest &&
+     1 != fwrite(signature_digest, signature_digest_len, 1, stdout))
+    error_code = -1;
+  Free(signature_digest);
+  Free(buf);
+  return error_code;
+}