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https://github.com/Telecominfraproject/OpenCellular.git
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f5564fa98c
This CL does the following: 1) It adds a SignatureBuf function which uses the OpenSSL library to generate RSA signature. This is more robust than the previous way of invoking the command line "openssl" utility and capturing its output. No more unnecessary temporary files for signature operations. 2) It adds functions that allow direct manipulation of binary verified Firmware and Kernel Image blobs in memory. 3) It changes the structure field members for FirmwareImage to make it consistent with KernelImage. Now it's clearer which key is used when. 4) Minor bug fixes and slightly improved API for dealing verified boot firmware and kernel images. 5) Renames the RSA_verify function to prevent conflicts with OpenSSL since it's linked into the firmware utility binary. Review URL: http://codereview.chromium.org/661353
99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
/* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Routines for verifying a file's signature. Useful in testing the core
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* RSA verification implementation.
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*/
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "file_keys.h"
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#include "sha_utility.h"
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#include "padding.h"
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#include "rsa.h"
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#include "rsa_utility.h"
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#include "verify_data.h"
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/* ANSI Color coding sequences. */
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#define COL_GREEN "\e[1;32m"
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#define COL_RED "\e[0;31m]"
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#define COL_STOP "\e[m"
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uint8_t* read_signature(char* input_file, int len) {
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int i, sigfd;
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uint8_t* signature = NULL;
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if ((sigfd = open(input_file, O_RDONLY)) == -1) {
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fprintf(stderr, "Couldn't open signature file\n");
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return NULL;
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}
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/* Read the signature into a buffer*/
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signature = (uint8_t*) malloc(len);
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if (!signature)
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return NULL;
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if( (i = read(sigfd, signature, len)) != len ) {
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fprintf(stderr, "Wrong signature length - Expected = %d, Received = %d\n",
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len, i);
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close(sigfd);
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return NULL;
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}
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close(sigfd);
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return signature;
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}
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int main(int argc, char* argv[]) {
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int i, algorithm, sig_len;
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int return_code = 1; /* Default to error. */
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uint8_t* digest = NULL;
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uint8_t* signature = NULL;
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RSAPublicKey* key = NULL;
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if (argc!=5) {
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fprintf(stderr, "Usage: %s <algorithm> <key file> <signature file>"
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" <input file>\n\n", argv[0]);
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fprintf(stderr, "where <algorithm> depends on the signature algorithm"
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" used:\n");
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for(i = 0; i<kNumAlgorithms; i++)
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fprintf(stderr, "\t%d for %s\n", i, algo_strings[i]);
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return -1;
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}
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algorithm = atoi(argv[1]);
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if (algorithm >= kNumAlgorithms) {
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fprintf(stderr, "Invalid Algorithm!\n");
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return 0;
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}
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/* Length of the RSA Signature/RSA Key */
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sig_len = siglen_map[algorithm];
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if ((key = RSAPublicKeyFromFile(argv[2])) &&
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(signature = read_signature(argv[3], sig_len)) &&
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(digest = DigestFile(argv[4], algorithm))) {
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if (RSAVerify(key, signature, sig_len, algorithm, digest)) {
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return_code = 0;
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fprintf(stderr, "Signature Verification "
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COL_GREEN "SUCCEEDED" COL_STOP "\n");
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} else {
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fprintf(stderr, "Signature Verification "
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COL_RED "FAILED" COL_STOP "\n");
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}
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}
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else
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return_code = -1;
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free(key);
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free(signature);
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free(digest);
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return return_code;
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}
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