1 // Copyright (c) 2013 Intel Corporation. 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.
5 #include "xwalk/application/common/package/xpk_package.h"
9 #include "base/file_util.h"
10 #include "base/files/scoped_file.h"
11 #include "crypto/signature_verifier.h"
12 #include "xwalk/application/common/id_util.h"
15 namespace application {
17 const uint8 kSignatureAlgorithm[15] = {
18 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86,
19 0xf7, 0x0d, 0x01, 0x01, 0x05, 0x05, 0x00
22 const char XPKPackage::kXPKPackageHeaderMagic[] = "CrWk";
24 XPKPackage::~XPKPackage() {
27 XPKPackage::XPKPackage(const base::FilePath& path)
28 : Package(path, Manifest::TYPE_MANIFEST),
30 if (!base::PathExists(path))
32 scoped_ptr<base::ScopedFILE> file(
33 new base::ScopedFILE(base::OpenFile(path, "rb")));
35 size_t len = fread(&header_, 1, sizeof(header_), file_->get());
37 if (len < sizeof(header_))
39 if (!strncmp(XPKPackage::kXPKPackageHeaderMagic, header_.magic,
40 sizeof(header_.magic)) &&
41 header_.key_size > 0 &&
42 header_.key_size <= XPKPackage::kMaxPublicKeySize &&
43 header_.signature_size > 0 &&
44 header_.signature_size <= XPKPackage::kMaxSignatureKeySize) {
46 zip_addr_ = sizeof(header_) + header_.key_size + header_.signature_size;
47 if (fseek(file_->get(), sizeof(header_), SEEK_SET)) {
51 key_.resize(header_.key_size);
52 size_t len = fread(&key_.front(), sizeof(uint8), header_.key_size,
54 if (len < header_.key_size)
57 signature_.resize(header_.signature_size);
58 len = fread(&signature_.front(), sizeof(uint8), header_.signature_size,
60 if (len < header_.signature_size)
63 if (!VerifySignature())
66 std::string public_key =
67 std::string(reinterpret_cast<char*>(&key_.front()), key_.size());
68 id_ = GenerateId(public_key);
72 bool XPKPackage::VerifySignature() {
73 // Set the file read position to the beginning of compressed resource file,
74 // which is behind the magic header, public key and signature key.
75 if (fseek(file_->get(), zip_addr_, SEEK_SET))
77 crypto::SignatureVerifier verifier;
78 if (!verifier.VerifyInit(kSignatureAlgorithm,
79 sizeof(kSignatureAlgorithm),
85 unsigned char buf[1 << 12];
87 while ((len = fread(buf, 1, sizeof(buf), file_->get())) > 0)
88 verifier.VerifyUpdate(buf, len);
89 if (!verifier.VerifyFinal())
95 bool XPKPackage::ExtractToTemporaryDir(base::FilePath* target_path) {
97 *target_path = temp_dir_.path();
102 LOG(ERROR) << "The XPK file is not valid.";
106 return Package::ExtractToTemporaryDir(target_path);
109 } // namespace application