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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/core/browser/password_generator.h"
#include <stddef.h>
#include <algorithm>
#include <vector>
#include "base/rand_util.h"
#include "base/strings/string_util.h"
#include "third_party/fips181/fips181.h"
const int kMinUpper = 65; // First upper case letter 'A'
const int kMaxUpper = 90; // Last upper case letter 'Z'
const int kMinLower = 97; // First lower case letter 'a'
const int kMaxLower = 122; // Last lower case letter 'z'
const int kMinDigit = 48; // First digit '0'
const int kMaxDigit = 57; // Last digit '9'
const int kMinPasswordLength = 4;
const int kMaxPasswordLength = 15;
namespace {
// A helper function to get the length of the generated password from
// |max_length| retrieved from input password field.
int GetLengthFromHint(int max_length, int default_length) {
if (max_length >= kMinPasswordLength && max_length <= kMaxPasswordLength)
return max_length;
else
return default_length;
}
// We want the password to have uppercase, lowercase, and at least one number.
bool VerifyPassword(const std::string& password) {
int num_lower_case = 0;
int num_upper_case = 0;
int num_digits = 0;
for (size_t i = 0; i < password.size(); ++i) {
if (password[i] >= kMinUpper && password[i] <= kMaxUpper)
++num_upper_case;
if (password[i] >= kMinLower && password[i] <= kMaxLower)
++num_lower_case;
if (password[i] >= kMinDigit && password[i] <= kMaxDigit)
++num_digits;
}
return num_lower_case && num_upper_case && num_digits;
}
} // namespace
namespace autofill {
const int PasswordGenerator::kDefaultPasswordLength = 15;
void ForceFixPassword(std::string* password) {
for (char& it : *password) {
if (islower(it)) {
it = base::ToUpperASCII(it);
break;
}
}
for (std::string::reverse_iterator iter = password->rbegin();
iter != password->rend(); ++iter) {
if (islower(*iter)) {
*iter = base::RandInt(kMinDigit, kMaxDigit);
break;
}
}
}
PasswordGenerator::PasswordGenerator(int max_length)
: password_length_(GetLengthFromHint(max_length, kDefaultPasswordLength)) {}
PasswordGenerator::~PasswordGenerator() {}
std::string PasswordGenerator::Generate() const {
char password[255];
char unused_hypenated_password[255];
// Generate passwords that have numbers and upper and lower case letters.
// No special characters included for now.
unsigned int mode = S_NB | S_CL | S_SL;
// Generate the password by gen_pron_pass(), if it is not conforming then
// force fix it.
gen_pron_pass(password, unused_hypenated_password, password_length_,
password_length_, mode);
std::string str_password(password);
if (VerifyPassword(str_password))
return str_password;
ForceFixPassword(&str_password);
return str_password;
}
} // namespace autofill
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