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/installer/xpk_package.h"
7 #include "base/file_util.h"
8 #include "base/files/scoped_file.h"
9 #include "crypto/signature_verifier.h"
10 #include "xwalk/application/common/id_util.h"
13 namespace application {
15 const uint8 kSignatureAlgorithm[15] = {
16 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86,
17 0xf7, 0x0d, 0x01, 0x01, 0x05, 0x05, 0x00
20 const char XPKPackage::kXPKPackageHeaderMagic[] = "CrWk";
22 XPKPackage::~XPKPackage() {
25 XPKPackage::XPKPackage(const base::FilePath& path)
27 if (!base::PathExists(path))
30 scoped_ptr<base::ScopedFILE> file(
31 new base::ScopedFILE(base::OpenFile(path, "rb")));
33 size_t len = fread(&header_, 1, sizeof(header_), file_->get());
35 if (len < sizeof(header_))
37 if (!strncmp(XPKPackage::kXPKPackageHeaderMagic,
39 sizeof(header_.magic)) &&
40 header_.key_size > 0 &&
41 header_.key_size <= XPKPackage::kMaxPublicKeySize &&
42 header_.signature_size > 0 &&
43 header_.signature_size <= XPKPackage::kMaxSignatureKeySize) {
45 zip_addr_ = sizeof(header_) + header_.key_size + header_.signature_size;
46 fseek(file_->get(), sizeof(header_), SEEK_SET);
47 key_.resize(header_.key_size);
49 &key_.front(), sizeof(uint8), header_.key_size, file_->get());
50 if (len < header_.key_size)
53 signature_.resize(header_.signature_size);
54 len = fread(&signature_.front(),
56 header_.signature_size,
58 if (len < header_.signature_size)
61 if (!VerifySignature())
64 std::string public_key =
65 std::string(reinterpret_cast<char*>(&key_.front()), key_.size());
66 id_ = GenerateId(public_key);
71 bool XPKPackage::VerifySignature() {
72 // Set the file read position to the beginning of compressed resource file,
73 // which is behind the magic header, public key and signature key.
74 fseek(file_->get(), zip_addr_, SEEK_SET);
75 crypto::SignatureVerifier verifier;
76 if (!verifier.VerifyInit(kSignatureAlgorithm,
77 sizeof(kSignatureAlgorithm),
83 unsigned char buf[1 << 12];
85 while ((len = fread(buf, 1, sizeof(buf), file_->get())) > 0)
86 verifier.VerifyUpdate(buf, len);
87 if (!verifier.VerifyFinal())
93 bool XPKPackage::Extract(base::FilePath* target_path) {
95 *target_path = temp_dir_.path();
100 LOG(ERROR) << "The XPK file is not valid.";
104 return Package::Extract(target_path);
107 } // namespace application