Index: utility/pad_digest_utility.c |
diff --git a/utility/pad_digest_utility.c b/utility/pad_digest_utility.c |
new file mode 100644 |
index 0000000000000000000000000000000000000000..50f81461577f1be2083afbb3653ca8cb17eade6a |
--- /dev/null |
+++ b/utility/pad_digest_utility.c |
@@ -0,0 +1,54 @@ |
+/* Copyright (c) 2011 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 for to generate a padded hash suitable for generating |
+ * PKCS#1.5 signatures. |
+ */ |
+ |
+ |
+#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* digest = NULL; |
+ uint8_t* padded_digest = NULL; |
+ uint64_t len; |
+ uint32_t padded_digest_len; |
+ |
+ if (argc != 3) { |
+ fprintf(stderr, "Usage: %s <alg_id> <digest_file>", argv[0]); |
+ return -1; |
+ } |
+ algorithm = atoi(argv[1]); |
+ if (algorithm < 0 || algorithm >= kNumAlgorithms) { |
+ fprintf(stderr, "Invalid Algorithm!\n"); |
+ return -1; |
+ } |
+ |
+ digest = BufferFromFile(argv[2], &len); |
+ if (!digest) { |
+ fprintf(stderr, "Could not read file: %s\n", argv[2]); |
+ return -1; |
+ } |
+ |
+ padded_digest = PrependDigestInfo(algorithm, digest); |
+ padded_digest_len = (hash_size_map[algorithm] + |
+ digestinfo_size_map[algorithm]); |
+ |
+ if (!padded_digest) |
+ error_code = -1; |
+ if(padded_digest && |
+ 1 != fwrite(padded_digest, padded_digest_len, 1, stdout)) |
+ error_code = -1; |
+ Free(padded_digest); |
+ Free(digest); |
+ return error_code; |
+} |