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 that outputs the cryptographic digest of a contents of a 6 * file in a format that can be directly used to generate PKCS#1 v1.5 7 * signatures via the "openssl" command line utility. 8 */ 9 10 11 #include <stdio.h> 12 #include <stdlib.h> 13 14 #include "file_keys.h" 15 #include "host_common.h" 16 #include "padding.h" 17 #include "signature_digest.h" 18 19 20 int main(int argc, char* argv[]) { 21 int algorithm = -1; 22 int error_code = 0; 23 uint8_t* buf = NULL; 24 uint8_t* signature_digest = NULL; 25 uint64_t len; 26 uint32_t signature_digest_len; 27 28 if (argc != 3) { 29 fprintf(stderr, "Usage: %s <alg_id> <file>", argv[0]); 30 return -1; 31 } 32 algorithm = atoi(argv[1]); 33 if (algorithm < 0 || algorithm >= kNumAlgorithms) { 34 fprintf(stderr, "Invalid Algorithm!\n"); 35 return -1; 36 } 37 38 buf = BufferFromFile(argv[2], &len); 39 if (!buf) { 40 fprintf(stderr, "Could not read file: %s\n", argv[2]); 41 return -1; 42 } 43 44 signature_digest = SignatureDigest(buf, len, algorithm); 45 signature_digest_len = (hash_size_map[algorithm] + 46 digestinfo_size_map[algorithm]); 47 if (!signature_digest) 48 error_code = -1; 49 if(signature_digest && 50 1 != fwrite(signature_digest, signature_digest_len, 1, stdout)) 51 error_code = -1; 52 free(signature_digest); 53 free(buf); 54 return error_code; 55 } 56
