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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/ownership/owner_key_util_impl.h"
#include <keythi.h>
#include <limits>
#include "base/files/file_util.h"
#include "base/logging.h"
#include "base/system/sys_info.h"
#include "build/build_config.h"
#include "crypto/nss_key_util.h"
namespace ownership {
static const uint16_t kKeySizeInBits = 2048;
OwnerKeyUtilImpl::OwnerKeyUtilImpl(const base::FilePath& public_key_file)
: public_key_file_(public_key_file) {}
OwnerKeyUtilImpl::~OwnerKeyUtilImpl() = default;
scoped_refptr<PublicKey> OwnerKeyUtilImpl::ImportPublicKey() {
// Get the file size (must fit in a 32 bit int for NSS).
std::optional<int64_t> file_size = base::GetFileSize(public_key_file_);
if (!file_size.has_value()) {
#if BUILDFLAG(IS_CHROMEOS)
LOG_IF(ERROR, base::SysInfo::IsRunningOnChromeOS())
<< "Could not get size of " << public_key_file_.value();
#endif // BUILDFLAG(IS_CHROMEOS)
return nullptr;
}
if (file_size.value() >
static_cast<int64_t>(std::numeric_limits<int>::max())) {
LOG(ERROR) << public_key_file_.value() << "is " << file_size.value()
<< "bytes!!! Too big!";
return nullptr;
}
int32_t safe_file_size = static_cast<int32_t>(file_size.value());
std::vector<uint8_t> key_data;
key_data.resize(safe_file_size);
if (safe_file_size == 0) {
LOG(WARNING) << "Public key file is empty. This seems wrong.";
return nullptr;
}
// Get the key data off of disk
int data_read =
base::ReadFile(public_key_file_, reinterpret_cast<char*>(key_data.data()),
safe_file_size);
if (data_read != safe_file_size) {
return nullptr;
}
return base::MakeRefCounted<ownership::PublicKey>(
/*is_persisted=*/true, std::move(key_data));
}
crypto::ScopedSECKEYPrivateKey OwnerKeyUtilImpl::GenerateKeyPair(
PK11SlotInfo* slot) {
DCHECK(slot);
PK11RSAGenParams param;
param.keySizeInBits = kKeySizeInBits;
param.pe = 65537L;
SECKEYPublicKey* public_key_ptr = nullptr;
crypto::ScopedSECKEYPrivateKey key(PK11_GenerateKeyPair(
slot, CKM_RSA_PKCS_KEY_PAIR_GEN, ¶m, &public_key_ptr,
PR_TRUE /* permanent */, PR_TRUE /* sensitive */, nullptr));
crypto::ScopedSECKEYPublicKey public_key(public_key_ptr);
return key;
}
crypto::ScopedSECKEYPrivateKey OwnerKeyUtilImpl::FindPrivateKeyInSlot(
const std::vector<uint8_t>& key,
PK11SlotInfo* slot) {
if (!slot)
return nullptr;
crypto::ScopedSECKEYPrivateKey private_key(
crypto::FindNSSKeyFromPublicKeyInfoInSlot(key, slot));
if (!private_key || SECKEY_GetPrivateKeyType(private_key.get()) != rsaKey)
return nullptr;
return private_key;
}
bool OwnerKeyUtilImpl::IsPublicKeyPresent() {
return base::PathExists(public_key_file_);
}
} // namespace ownership
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