1 /* Copyright (c) 2011 The Chromium OS Authors. All rights reserved. 2 * Use of this source code is governed by a BSD-style license that can be 3 * found in the LICENSE file. 4 * 5 * Utility for to generate a padded hash suitable for generating 6 * PKCS#1.5 signatures. 7 */ 8 9 10 #include <stdio.h> 11 #include <stdlib.h> 12 13 #include "file_keys.h" 14 #include "host_common.h" 15 #include "padding.h" 16 #include "signature_digest.h" 17 18 19 int main(int argc, char* argv[]) { 20 int algorithm = -1; 21 int error_code = 0; 22 uint8_t* digest = NULL; 23 uint8_t* padded_digest = NULL; 24 uint64_t len; 25 uint32_t padded_digest_len; 26 27 if (argc != 3) { 28 fprintf(stderr, "Usage: %s <alg_id> <digest_file>", argv[0]); 29 return -1; 30 } 31 algorithm = atoi(argv[1]); 32 if (algorithm < 0 || algorithm >= kNumAlgorithms) { 33 fprintf(stderr, "Invalid Algorithm!\n"); 34 return -1; 35 } 36 37 digest = BufferFromFile(argv[2], &len); 38 if (!digest) { 39 fprintf(stderr, "Could not read file: %s\n", argv[2]); 40 return -1; 41 } 42 43 padded_digest = PrependDigestInfo(algorithm, digest); 44 padded_digest_len = (hash_size_map[algorithm] + 45 digestinfo_size_map[algorithm]); 46 47 if (!padded_digest) 48 error_code = -1; 49 if(padded_digest && 50 1 != fwrite(padded_digest, padded_digest_len, 1, stdout)) 51 error_code = -1; 52 free(padded_digest); 53 free(digest); 54 return error_code; 55 } 56
