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Add fuzz testing driver programs for kernel and firmware verification.

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The driver programs are useful in quick and dirty fuzz testing of the verification code with blind smartfuzzers like Bunny (http://code.google.com/p/bunny-the-fuzzer/).

Also fixes a bug with image generation in kernel_utility.

Tests: All existing tests still pass. VerifyKernel() and VerifyFirmware() can successfully verify images generated by {firmware|kernel}_utility.

Review URL: http://codereview.chromium.org/975007
This commit is contained in:
Gaurav Shah
2010-03-17 20:40:23 -07:00
parent 4f39386902
commit ccaa90f735
6 changed files with 203 additions and 9 deletions
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16
utils/kernel_utility.cc
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@@ -2,7 +2,7 @@
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// Utility for manipulating verified boot firmware images.
// Utility for manipulating verified boot kernel images.
//
#include "kernel_utility.h"
@@ -55,7 +55,7 @@ KernelUtility::~KernelUtility() {
void KernelUtility::PrintUsage(void) {
cerr <<
"Utility to generate/verify a verified boot kernel image\n\n"
"Usage: firmware_utility <--generate|--verify> [OPTIONS]\n\n"
"Usage: kernel_utility <--generate|--verify> [OPTIONS]\n\n"
"For \"--verify\", required OPTIONS are:\n"
"--in <infile>\t\t\tVerified boot kernel image to verify.\n"
"--firmware_key_pub <pubkeyfile>\tPre-processed public firmware key "
@@ -227,7 +227,11 @@ bool KernelUtility::GenerateSignedImage(void) {
sizeof(image_->header_version));
DigestUpdate(&ctx, reinterpret_cast<uint8_t*>(&image_->header_len),
sizeof(image_->header_len));
DigestUpdate(&ctx, reinterpret_cast<uint8_t*>(&image_->kernel_sign_algorithm),
DigestUpdate(&ctx,
reinterpret_cast<uint8_t*>(&image_->firmware_sign_algorithm),
sizeof(image_->firmware_sign_algorithm));
DigestUpdate(&ctx,
reinterpret_cast<uint8_t*>(&image_->kernel_sign_algorithm),
sizeof(image_->kernel_sign_algorithm));
DigestUpdate(&ctx, reinterpret_cast<uint8_t*>(&image_->kernel_key_version),
sizeof(image_->kernel_key_version));
@@ -248,12 +252,12 @@ bool KernelUtility::GenerateSignedImage(void) {
return false;
// Generate and add the signatures.
if (!AddKernelKeySignature(image_, firmware_key_file_.c_str())) {
cerr << "Couldn't write key signature to verified boot image.\n";
cerr << "Couldn't write key signature to verified boot kernel image.\n";
return false;
}
if (!AddKernelSignature(image_, kernel_key_file_.c_str())) {
cerr << "Couldn't write firmware signature to verified boot image.\n";
cerr << "Couldn't write firmware signature to verified boot kernel image.\n";
return false;
}
return true;
@@ -270,7 +274,7 @@ bool KernelUtility::VerifySignedImage(void) {
}
if (!image_) {
cerr << "Couldn't read firmware image or malformed image.\n";
cerr << "Couldn't read kernel image or malformed image.\n";
return false;
}
if (!(error = VerifyKernelImage(firmware_key_pub_, image_, 0)))