| /* 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. |
| * |
| * Tests for firmware image library. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| #include "file_keys.h" |
| #include "firmware_image.h" |
| #include "rsa_utility.h" |
| #include "sha_utility.h" |
| #include "utility.h" |
| |
| int TEST_EQ(int result, int expected_result, char* testname) { |
| if (result == expected_result) { |
| fprintf(stderr, "%s Test \e[1;32mSUCCEEDED\e[m\n", testname); |
| return 1; |
| } |
| else { |
| fprintf(stderr, "%s Test \e[0;31mFAILED\e[m\n", testname); |
| return 0; |
| } |
| } |
| |
| FirmwareImage* GenerateTestFirmwareImage(int algorithm, |
| uint8_t* sign_key, |
| int key_version, |
| int firmware_version, |
| int firmware_len) { |
| FirmwareImage* image = FirmwareImageNew(); |
| uint8_t* header_hash; |
| DigestContext ctx; |
| |
| Memcpy(image->magic, FIRMWARE_MAGIC, FIRMWARE_MAGIC_SIZE); |
| image->sign_algorithm = algorithm; |
| image->sign_key = (uint8_t*) Malloc( |
| RSAProcessedKeySize(image->sign_algorithm)); |
| Memcpy(image->sign_key, sign_key, RSAProcessedKeySize(image->sign_algorithm)); |
| image->key_version = key_version; |
| |
| /* Calculate SHA-512 digest on header and populate header_hash. */ |
| DigestInit(&ctx, ROOT_SIGNATURE_ALGORITHM); |
| DigestUpdate(&ctx, (uint8_t*) &image->header_len, |
| sizeof(image->header_len)); |
| DigestUpdate(&ctx, (uint8_t*) &image->sign_algorithm, |
| sizeof(image->sign_algorithm)); |
| DigestUpdate(&ctx, image->sign_key, |
| RSAProcessedKeySize(image->sign_algorithm)); |
| DigestUpdate(&ctx, (uint8_t*) &image->key_version, |
| sizeof(image->key_version)); |
| header_hash = DigestFinal(&ctx); |
| Memcpy(image->header_hash, header_hash, SHA512_DIGEST_SIZE); |
| Free(header_hash); |
| |
| /* Update correct header length. */ |
| image->header_len = (sizeof(image->header_len) + |
| sizeof(image->sign_algorithm) + |
| RSAProcessedKeySize(image->sign_algorithm) + |
| sizeof(image->key_version) + |
| sizeof(image->header_hash)); |
| |
| /* Populate firmware and preamble with dummy data. */ |
| image->firmware_version = firmware_version; |
| image->firmware_len = firmware_len; |
| image->preamble_signature = image->firmware_signature = NULL; |
| Memset(image->preamble, 'P', FIRMWARE_PREAMBLE_SIZE); |
| image->firmware_data = Malloc(image->firmware_len); |
| Memset(image->firmware_data, 'F', image->firmware_len); |
| |
| return image; |
| } |
| |
| #define DEV_MODE_ENABLED 1 |
| #define DEV_MODE_DISABLED 0 |
| |
| /* Normal Firmware Verification Tests. */ |
| int VerifyFirmwareTest(FirmwareImage* image, RSAPublicKey* root_key) { |
| int success = 1; |
| if (!TEST_EQ(VerifyFirmware(root_key, image, DEV_MODE_ENABLED), |
| VERIFY_SUCCESS, |
| "Normal Verification (Dev Mode)")) |
| success = 0; |
| |
| if (!TEST_EQ(VerifyFirmware(root_key, image, DEV_MODE_DISABLED), |
| VERIFY_SUCCESS, |
| "Normal Verification (Trusted)")) |
| success = 0; |
| return success; |
| } |
| |
| /* Tampered Firmware Verification Tests. */ |
| int VerifyFirmwareTamperTest(FirmwareImage* image, RSAPublicKey* root_key) { |
| int success = 1; |
| fprintf(stderr, "Tampering with firmware preamble....\n"); |
| image->firmware_version = 0; |
| if (!TEST_EQ(VerifyFirmware(root_key, image, DEV_MODE_ENABLED), |
| VERIFY_PREAMBLE_SIGNATURE_FAILED, |
| "Firmware Preamble Tamper Verification (Dev Mode)")) |
| success = 0; |
| |
| if (!TEST_EQ(VerifyFirmware(root_key, image, DEV_MODE_DISABLED), |
| VERIFY_PREAMBLE_SIGNATURE_FAILED, |
| "Firmware Preamble Tamper Verification (Trusted)")) |
| success = 0; |
| image->firmware_version = 1; |
| |
| image->firmware_data[0] = 'T'; |
| if (!TEST_EQ(VerifyFirmware(root_key, image, DEV_MODE_ENABLED), |
| VERIFY_FIRMWARE_SIGNATURE_FAILED, |
| "Firmware Tamper Verification (Dev Mode)")) |
| success = 0; |
| if (!TEST_EQ(VerifyFirmware(root_key, image, DEV_MODE_DISABLED), |
| VERIFY_FIRMWARE_SIGNATURE_FAILED, |
| "Firmware Tamper Verification (Trusted)")) |
| success = 0; |
| image->firmware_data[0] = 'F'; |
| |
| |
| fprintf(stderr, "Tampering with root key signature...\n"); |
| image->key_signature[0] = 0xFF; |
| image->key_signature[1] = 0x00; |
| if (!TEST_EQ(VerifyFirmware(root_key, image, DEV_MODE_ENABLED), |
| VERIFY_SUCCESS, |
| "Root Signature Tamper Verification (Dev Mode)")) |
| success = 0; |
| if (!TEST_EQ(VerifyFirmware(root_key, image, DEV_MODE_DISABLED), |
| VERIFY_ROOT_SIGNATURE_FAILED, |
| "Root Signature Tamper Verification (Trusted)")) |
| success = 0; |
| |
| return success; |
| } |
| |
| int main(int argc, char* argv[]) { |
| int len; |
| uint8_t* sign_key_buf; |
| FirmwareImage* image; |
| RSAPublicKey* root_key; |
| int success = 1; |
| |
| if(argc != 6) { |
| fprintf(stderr, "Usage: %s <algorithm> <root key> <processed root pubkey>" |
| " <signing key> <processed signing key>\n", argv[0]); |
| return -1; |
| } |
| |
| /* Read verification keys and create a test image. */ |
| root_key = RSAPublicKeyFromFile(argv[3]); |
| sign_key_buf = BufferFromFile(argv[5], &len); |
| image = GenerateTestFirmwareImage(atoi(argv[1]), sign_key_buf, 1, |
| 1, 1000); |
| |
| /* Generate and populate signatures. */ |
| if (!AddKeySignature(image, argv[2])) { |
| fprintf(stderr, "Couldn't create key signature.\n"); |
| return -1; |
| } |
| |
| if (!AddFirmwareSignature(image, argv[4], image->sign_algorithm)) { |
| fprintf(stderr, "Couldn't create firmware and preamble signature.\n"); |
| return -1; |
| } |
| |
| if (!VerifyFirmwareTest(image, root_key)) |
| success = 0; |
| if (!VerifyFirmwareTamperTest(image, root_key)) |
| success = 0; |
| |
| /* Clean up. */ |
| Free(root_key); |
| Free(sign_key_buf); |
| Free(image); |
| |
| return !success; |
| } |