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/* 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"
/* ANSI Color coding sequences. */
#define COL_GREEN "\e[1;32m"
#define COL_RED "\e[0;31m]"
#define COL_STOP "\e[m"
int TEST_EQ(int result, int expected_result, char* testname) {
if (result == expected_result) {
fprintf(stderr, "%s Test " COL_GREEN " PASSED\n" COL_STOP, testname);
return 1;
}
else {
fprintf(stderr, "%s Test " COL_RED " FAILED\n" COL_STOP, testname);
return 0;
}
}
FirmwareImage* GenerateTestFirmwareImage(int algorithm,
uint8_t* firmware_sign_key,
int firmware_key_version,
int firmware_version,
int firmware_len) {
FirmwareImage* image = FirmwareImageNew();
uint8_t* header_checksum;
DigestContext ctx;
Memcpy(image->magic, FIRMWARE_MAGIC, FIRMWARE_MAGIC_SIZE);
image->firmware_sign_algorithm = algorithm;
image->firmware_sign_key = (uint8_t*) Malloc(
RSAProcessedKeySize(image->firmware_sign_algorithm));
Memcpy(image->firmware_sign_key, firmware_sign_key,
RSAProcessedKeySize(image->firmware_sign_algorithm));
image->firmware_key_version = firmware_key_version;
/* Update correct header length. */
image->header_len = (sizeof(image->header_len) +
sizeof(image->firmware_sign_algorithm) +
RSAProcessedKeySize(image->firmware_sign_algorithm) +
sizeof(image->firmware_key_version) +
sizeof(image->header_checksum));
/* Calculate SHA-512 digest on header and populate header_checksum. */
DigestInit(&ctx, ROOT_SIGNATURE_ALGORITHM);
DigestUpdate(&ctx, (uint8_t*) &image->header_len,
sizeof(image->header_len));
DigestUpdate(&ctx, (uint8_t*) &image->firmware_sign_algorithm,
sizeof(image->firmware_sign_algorithm));
DigestUpdate(&ctx, image->firmware_sign_key,
RSAProcessedKeySize(image->firmware_sign_algorithm));
DigestUpdate(&ctx, (uint8_t*) &image->firmware_key_version,
sizeof(image->firmware_key_version));
header_checksum = DigestFinal(&ctx);
Memcpy(image->header_checksum, header_checksum, SHA512_DIGEST_SIZE);
Free(header_checksum);
/* 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 Blob Verification Tests. */
int VerifyFirmwareTest(uint8_t* firmware_blob, uint8_t* root_key_blob) {
int success = 1;
if (!TEST_EQ(VerifyFirmware(root_key_blob, firmware_blob, DEV_MODE_ENABLED),
VERIFY_FIRMWARE_SUCCESS,
"Normal Firmware Blob Verification (Dev Mode)"))
success = 0;
if (!TEST_EQ(VerifyFirmware(root_key_blob, firmware_blob, DEV_MODE_DISABLED),
VERIFY_FIRMWARE_SUCCESS,
"Normal Firmware Blob Verification (Trusted)"))
success = 0;
return success;
}
/* Normal FirmwareImage Verification Tests. */
int VerifyFirmwareImageTest(FirmwareImage* image,
RSAPublicKey* root_key) {
int success = 1;
if (!TEST_EQ(VerifyFirmwareImage(root_key, image, DEV_MODE_ENABLED),
VERIFY_FIRMWARE_SUCCESS,
"Normal FirmwareImage Verification (Dev Mode)"))
success = 0;
if (!TEST_EQ(VerifyFirmwareImage(root_key, image, DEV_MODE_DISABLED),
VERIFY_FIRMWARE_SUCCESS,
"Normal FirmwareImage Verification (Trusted)"))
success = 0;
return success;
}
/* Tampered FirmwareImage Verification Tests. */
int VerifyFirmwareImageTamperTest(FirmwareImage* image,
RSAPublicKey* root_key) {
int success = 1;
fprintf(stderr, "[[Tampering with firmware preamble....]]\n");
image->firmware_version = 0;
if (!TEST_EQ(VerifyFirmwareImage(root_key, image, DEV_MODE_ENABLED),
VERIFY_FIRMWARE_PREAMBLE_SIGNATURE_FAILED,
"FirmwareImage Preamble Tamper Verification (Dev Mode)"))
success = 0;
if (!TEST_EQ(VerifyFirmwareImage(root_key, image, DEV_MODE_DISABLED),
VERIFY_FIRMWARE_PREAMBLE_SIGNATURE_FAILED,
"FirmwareImage Preamble Tamper Verification (Trusted)"))
success = 0;
image->firmware_version = 1;
image->firmware_data[0] = 'T';
if (!TEST_EQ(VerifyFirmwareImage(root_key, image, DEV_MODE_ENABLED),
VERIFY_FIRMWARE_SIGNATURE_FAILED,
"FirmwareImage Tamper Verification (Dev Mode)"))
success = 0;
if (!TEST_EQ(VerifyFirmwareImage(root_key, image, DEV_MODE_DISABLED),
VERIFY_FIRMWARE_SIGNATURE_FAILED,
"FirmwareImage Tamper Verification (Trusted)"))
success = 0;
image->firmware_data[0] = 'F';
fprintf(stderr, "[[Tampering with root key signature...]]\n");
image->firmware_key_signature[0] = 0xFF;
image->firmware_key_signature[1] = 0x00;
if (!TEST_EQ(VerifyFirmwareImage(root_key, image, DEV_MODE_ENABLED),
VERIFY_FIRMWARE_SUCCESS,
"FirmwareImage Root Signature Tamper Verification (Dev Mode)"))
success = 0;
if (!TEST_EQ(VerifyFirmwareImage(root_key, image, DEV_MODE_DISABLED),
VERIFY_FIRMWARE_ROOT_SIGNATURE_FAILED,
"FirmwareImage Root Signature Tamper Verification (Trusted)"))
success = 0;
return success;
}
int main(int argc, char* argv[]) {
uint64_t len;
uint8_t* firmware_sign_key_buf = NULL;
uint8_t* root_key_blob = NULL;
uint8_t* firmware_blob = NULL;
uint64_t firmware_blob_len = 0;
FirmwareImage* image = NULL;
RSAPublicKey* root_key = NULL;
int error_code = 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]);
root_key_blob = BufferFromFile(argv[3], &len);
firmware_sign_key_buf = BufferFromFile(argv[5], &len);
image = GenerateTestFirmwareImage(atoi(argv[1]), firmware_sign_key_buf, 1,
1, 1000);
if (!root_key || !firmware_sign_key_buf || !image) {
error_code = 1;
goto failure;
}
/* Generate and populate signatures. */
if (!AddFirmwareKeySignature(image, argv[2])) {
fprintf(stderr, "Couldn't create key signature.\n");
error_code = 1;
goto failure;
}
if (!AddFirmwareSignature(image, argv[4])) {
fprintf(stderr, "Couldn't create firmware and preamble signature.\n");
error_code = 1;
goto failure;
}
firmware_blob = GetFirmwareBlob(image, &firmware_blob_len);
/* Test Firmware blob verify operations. */
if (!VerifyFirmwareTest(firmware_blob, root_key_blob))
error_code = 255;
/* Test FirmwareImage verify operations. */
if (!VerifyFirmwareImageTest(image, root_key))
error_code = 255;
if (!VerifyFirmwareImageTamperTest(image, root_key))
error_code = 255;
failure:
Free(firmware_blob);
FirmwareImageFree(image);
Free(firmware_sign_key_buf);
Free(root_key_blob);
RSAPublicKeyFree(root_key);
return error_code;
}
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