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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/autofill/content/browser/wallet/full_wallet.h"
#include <stddef.h>
#include <utility>
#include "base/logging.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/utf_string_conversions.h"
#include "base/values.h"
#include "components/autofill/core/browser/autofill_type.h"
#include "components/autofill/core/browser/credit_card.h"
namespace {
const size_t kPanSize = 16;
const size_t kBinSize = 6;
const size_t kCvnSize = 3;
const size_t kEncryptedRestSize = 12;
} // anonymous namespace
namespace autofill {
namespace wallet {
FullWallet::FullWallet(int expiration_month,
int expiration_year,
const std::string& iin,
const std::string& encrypted_rest,
scoped_ptr<Address> billing_address,
scoped_ptr<Address> shipping_address)
: expiration_month_(expiration_month),
expiration_year_(expiration_year),
iin_(iin),
encrypted_rest_(encrypted_rest),
billing_address_(std::move(billing_address)),
shipping_address_(std::move(shipping_address)) {
DCHECK(billing_address_.get());
}
FullWallet::~FullWallet() {}
// static
scoped_ptr<FullWallet>
FullWallet::CreateFullWalletFromClearText(
int expiration_month,
int expiration_year,
const std::string& pan,
const std::string& cvn,
scoped_ptr<Address> billing_address,
scoped_ptr<Address> shipping_address) {
DCHECK(billing_address);
DCHECK(!pan.empty());
DCHECK(!cvn.empty());
scoped_ptr<FullWallet> wallet(new FullWallet(
expiration_month, expiration_year,
std::string(), // no iin -- clear text pan/cvn are set below.
std::string(), // no encrypted_rest -- clear text pan/cvn are set below.
std::move(billing_address), std::move(shipping_address)));
wallet->pan_ = pan;
wallet->cvn_ = cvn;
return wallet;
}
base::string16 FullWallet::GetInfo(const std::string& app_locale,
const AutofillType& type) {
switch (type.GetStorableType()) {
case CREDIT_CARD_NUMBER:
return base::ASCIIToUTF16(GetPan());
case CREDIT_CARD_NAME_FULL:
return billing_address()->recipient_name();
case CREDIT_CARD_VERIFICATION_CODE:
return base::ASCIIToUTF16(GetCvn());
case CREDIT_CARD_EXP_MONTH:
if (expiration_month() == 0)
return base::string16();
return base::IntToString16(expiration_month());
case CREDIT_CARD_EXP_4_DIGIT_YEAR:
if (expiration_year() == 0)
return base::string16();
return base::IntToString16(expiration_year());
case CREDIT_CARD_EXP_2_DIGIT_YEAR:
if (expiration_year() == 0)
return base::string16();
return base::IntToString16(expiration_year() % 100);
case CREDIT_CARD_EXP_DATE_2_DIGIT_YEAR:
if (expiration_month() == 0 || expiration_year() == 0)
return base::string16();
return base::IntToString16(expiration_month()) + base::ASCIIToUTF16("/") +
base::IntToString16(expiration_year() % 100);
case CREDIT_CARD_EXP_DATE_4_DIGIT_YEAR:
if (expiration_month() == 0 || expiration_year() == 0)
return base::string16();
return base::IntToString16(expiration_month()) + base::ASCIIToUTF16("/") +
base::IntToString16(expiration_year());
case CREDIT_CARD_TYPE: {
const char* const internal_type =
CreditCard::GetCreditCardType(base::ASCIIToUTF16(GetPan()));
if (internal_type == kGenericCard)
return base::string16();
return CreditCard::TypeForDisplay(internal_type);
}
default: {
switch (type.group()) {
case NAME_BILLING:
case PHONE_BILLING:
case ADDRESS_BILLING:
return billing_address_->GetInfo(type, app_locale);
case CREDIT_CARD:
NOTREACHED();
default:
return shipping_address_->GetInfo(type, app_locale);
}
}
}
}
base::string16 FullWallet::TypeAndLastFourDigits() {
CreditCard card;
card.SetRawInfo(CREDIT_CARD_NUMBER, base::ASCIIToUTF16(GetPan()));
return card.TypeAndLastFourDigits();
}
const std::string& FullWallet::GetPan() {
if (pan_.empty())
DecryptCardInfo();
return pan_;
}
bool FullWallet::operator==(const FullWallet& other) const {
if (expiration_month_ != other.expiration_month_)
return false;
if (expiration_year_ != other.expiration_year_)
return false;
if (iin_ != other.iin_)
return false;
if (encrypted_rest_ != other.encrypted_rest_)
return false;
if (billing_address_.get() && other.billing_address_.get()) {
if (*billing_address_.get() != *other.billing_address_.get())
return false;
} else if (billing_address_.get() || other.billing_address_.get()) {
return false;
}
if (shipping_address_.get() && other.shipping_address_.get()) {
if (*shipping_address_.get() != *other.shipping_address_.get())
return false;
} else if (shipping_address_.get() || other.shipping_address_.get()) {
return false;
}
return true;
}
bool FullWallet::operator!=(const FullWallet& other) const {
return !(*this == other);
}
void FullWallet::DecryptCardInfo() {
// |encrypted_rest_| must be of length |kEncryptedRestSize| in order for
// decryption to succeed and the server will not pad it with zeros.
while (encrypted_rest_.size() < kEncryptedRestSize) {
encrypted_rest_ = '0' + encrypted_rest_;
}
DCHECK_EQ(kEncryptedRestSize, encrypted_rest_.size());
std::vector<uint8_t> operating_data;
// Convert |encrypted_rest_| to bytes so we can decrypt it with |otp|.
if (!base::HexStringToBytes(encrypted_rest_, &operating_data)) {
DLOG(ERROR) << "Failed to parse encrypted rest";
return;
}
// Ensure |one_time_pad_| and |encrypted_rest_| are of the same length
// otherwise something has gone wrong and we can't decrypt the data.
DCHECK_EQ(one_time_pad_.size(), operating_data.size());
std::vector<uint8_t> results;
// XOR |otp| with the encrypted data to decrypt.
for (size_t i = 0; i < one_time_pad_.size(); ++i)
results.push_back(one_time_pad_[i] ^ operating_data[i]);
// There is no uint8_t* to int64_t so convert the decrypted data to hex and
// then parse the hex to an int64_t before getting the int64_t as a string.
std::string hex_decrypted = base::HexEncode(&(results[0]), results.size());
int64_t decrypted;
if (!base::HexStringToInt64(hex_decrypted, &decrypted)) {
DLOG(ERROR) << "Failed to parse decrypted data in hex to int64_t";
return;
}
std::string card_info = base::Int64ToString(decrypted);
size_t padded_length = kPanSize - kBinSize + kCvnSize;
// |card_info| is PAN without the IIN concatenated with the CVN, i.e.
// PANPANPANPCVN. If what was decrypted is not of that size the front needs
// to be padded with 0's until it is.
if (card_info.size() != padded_length)
card_info.insert(card_info.begin(), padded_length - card_info.size(), '0');
// Separate out the PAN from the CVN.
size_t split = kPanSize - kBinSize;
cvn_ = card_info.substr(split);
pan_ = iin_ + card_info.substr(0, split);
}
const std::string& FullWallet::GetCvn() {
if (cvn_.empty())
DecryptCardInfo();
return cvn_;
}
} // namespace wallet
} // namespace autofill
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