This question already has answers here:
How to verify_password from a database
(2 answers)
Closed 3 years ago.
So I have a login page which worked fine without hashed passwords but of course, that wasn't secure so I decided to hash the passwords when registering.
but I don't know how and where should I use verify_password when I'm selecting the password from the database. I use while to see if there is a result with the username and password entered like this:
$q = "SELECT * FROM users WHERE username='$username' AND password='$password'";
$x = $conn->query($q);
if ($x->num_rows > 0) {
while ($row = $x->fetch_assoc()) {
//Logged in seccesfully!
}
} else {
// Username or password is wrong!
}
password_hash() function can simplify our lives and our code can be secure. When you need to hash a password, just feed it to the function and it will return the hash which you can store in your database.
$hash = password_hash($password, PASSWORD_DEFAULT);
Now that you have seen how to generate hashes with the new API, let’s see how to verify a password. Remember that you store the hashes in a database, but it’s the plain password that you get when a user logs in.
The password_verify() function takes a plain password and the hashed string as its two arguments. It returns true if the hash matches the specified password.
<?php
if (password_verify($password, $hash)) {
// Success!
}
else {
// Invalid credentials
}
for more info read
Related
This question already has answers here:
How to use PHP's password_hash to hash and verify passwords
(5 answers)
Closed 12 months ago.
I've created a simple login/registration form. The registered information is stored in a .txt file (this is for educational purposes only not real use).
I am hashing the registered input before I put it in the.txt file. When the user logs in I want to use password_verify to check the hash. If the hash is the same as the login input the user is verified and should therefore be logged in.
With the current code, even if the login is the same as what's stored in the.txt file it jumps straight to the }else statement that says username and/or password is incorrect.
EDIT: If I enter username as 123 and password as 123 the textfile shows:
$2y$10$VeZB8AZmL9lAfRQ1qKBxEug8A3RrPxM9JlOAo9prw/UOWU4.XpdqC,$2y$10$kU5AvH4hTgE1cvHmTItIU.pnTsbYvKH9bLl3Bxfy4ig7QZKdVVV46,
I am new to PHP and programming in general and any help is appreciated :)
// GETS FORM INPUT
if(isset($_POST['username']) && $_POST['password']){
$username = $_POST['username'];
$password = $_POST['password'];
$hashName = password_hash($username,PASSWORD_DEFAULT);
$hashPass = password_hash($password, PASSWORD_DEFAULT);
}
// LOGIN
if($_POST['btn'] == 'Login'){
userExist($username, $password, $hashName, $hashPass);
}
// REGISTER
else if(($_POST['btn'] == 'Register')){
$fh = fopen("logininfo.txt", 'a') or die("Unable to open file");
$login = <<<_END
$hashName,$hashPass,
_END;
fwrite($fh, $login) or die("Unable to write to file");
fclose($fh);
}
//VERIFIES USER
function userExist($username, $password, $hashName, $hashPass){
$accounts = file_get_contents('logininfo.txt');
$accArray = explode(',', $accounts);
print_r($accArray);
if((password_verify($hashName, $accArray[0])) && (password_verify($hashPass, $accArray[1]))){
header('Location: index.php');
}else{
echo "username and/or password is incorrect";
}
}
There's too much hashing here.
When registering a user you store the unhashed user name and the password hashed with password_hash()
When logging in you use the unhashed user name to recover the hashed password for that user, then use password_verify() to compare the unhashed password the user has given you with the hashed password you stored.
password_hash() adds a random salt to the password and stores the salt and the generated hash in the resulting string. Even if you hash the same password twice you'll get a different result each time.
This question already has answers here:
How to use PHP's password_hash to hash and verify passwords
(5 answers)
Closed 3 years ago.
I'm creating a site where a user can login. When they make an account, I save the hashed password in the database. I am trying to user password_verify() in order to confirm the password matches, but it returns false.
To confirm that they match, I print out both the hashed version of what the user typed in and the hashed password that is stored in the database.
I know a common problem is that the database password field is too small for the hashed password, but I have tried setting it as both VARCHAR(256) and TEXT to make sure the entire hashed password is stored.
if(isset($_POST['email'])){
$email = strip_tags(mysqli_real_escape_string($conn, $_POST['email']));
$password = strip_tags(mysqli_real_escape_string($conn, $_POST['passwd']));
$sql = "SELECT email, passwd AS hashed_password FROM Accounts WHERE email = '$email'";
$result = $conn->query($sql);
$row = mysqli_fetch_array($result,MYSQLI_ASSOC);
//print the hashed password that is stored in the database
echo 'stored in the database: '. $row['hashed_password']. '<br>';
$hash = hash('sha512', $password);
//print the hashed version of what the user typed in
echo 'hashed version of what your submitted: '. $hash. '<br>';
if( password_verify($password, $hash)){
echo "true";
}
else{
echo 'false';
}
I expect that password_verify() returns true but it returns false
Here is what i have it currently outputting:
stored in the database:
1f40fc92da241694750979ee6cf582f2d5d7d28e18335de05abc54d0560e0f5302860c652bf08d560252aa5e74210546f369fbbbce8c12cfc7957b2652fe9a75
hashed version of what your submitted:
1f40fc92da241694750979ee6cf582f2d5d7d28e18335de05abc54d0560e0f5302860c652bf08d560252aa5e74210546f369fbbbce8c12cfc7957b2652fe9a75
false
password_verify() works with the function password_hash();
change:
$hash = hash('sha512', $password);
to:
$hash = password_hash($password, PASSWORD_DEFAULT);
This question already has answers here:
Secure hash and salt for PHP passwords
(14 answers)
Closed 5 years ago.
What is the best way to encrypt a password in Php. Codeigniter's documentation says that password should be hashed using php's Password Hashing extension. Until now i have been encrypting password's using encryption key of codeigniter. Any suggestions.
Use this is for password Hashing
<?php
/**
* We just want to hash our password using the current DEFAULT algorithm.
* This is presently BCRYPT, and will produce a 60 character result.
*
* Beware that DEFAULT may change over time, so you would want to prepare
* By allowing your storage to expand past 60 characters (255 would be good)
*/
echo password_hash("rasmuslerdorf", PASSWORD_DEFAULT)."\n";
?>
Use this is for password Hashing Verify
<?php
// See the password_hash() example to see where this came from.
$hash = '$2y$07$BCryptRequires22Chrcte/VlQH0piJtjXl.0t1XkA8pw9dMXTpOq';
if (password_verify('rasmuslerdorf', $hash)) {
echo 'Password is valid!';
} else {
echo 'Invalid password.';
}
?>
You can also use md5() function for password encryption and Decryption.
Here is the example :
$password = '123456789';
$encrypted_password = md5($password);
echo "Encrypted Password :".$encrypted_password;
-------------------
Output :
Encrypted Password : 25f9e794323b453885f5181f1b624d0b
Now to check entered password is correct or not ( for example login ) get stored md5 password from the database and you can check it this way.
$entered_password = '123456789';
$encrypted_password = md5($entered_password);
if($encrypted_password == $password){
echo "Success";
}else{
echo "Fail";
}
This question already has answers here:
Using PHP 5.5's password_hash and password_verify function
(4 answers)
Closed 7 years ago.
I am using this to hash passwords: https://github.com/ircmaxell/password_compat
$hash = password_hash($pass1, PASSWORD_BCRYPT, array("cost" => 16));
if (password_verify($password, $hash)) {
/* Valid */
} else {
/* Invalid */
}
It works. It hashed passwords. But I dont know how to verify the password in the login page. I have tried with seesions but it doesnt work with sessions too.
you have to put the Hash in Database
Step one : create and store the hash in database
$hash = password_hash($pass1, PASSWORD_BCRYPT, array("cost" => 16));
Step two : login
$hash = // hash of user from database by unique id
$password = // string submit by user from login form
if (password_verify($password, $hash)) {
if (password_needs_rehash($hash, PASSWORD_BCRYPT, array("cost" => 16))) {
$hash = password_hash($password, PASSWORD_BCRYPT, array("cost" => 16));
/* Store new hash in db */
}
} else {
/* Invalid */
}
Hope it will be help you
The way I have done it in the past is in the following steps:
1) User submits their Username/password combination.
2) I see if the Username exists in the database, if it does I pull out that user record from the database, if it doesn't I present a generic error to the user (i.e. wrong username/password combination)
3) I then use the password_verify function with the submitted password against the hashed password connected to the user they are trying to log in as.
4) If its true, they're logged in otherwise I present the same generic error to the user (wrong username/password combination)
Basically you have to hash the password user puts in login page and check if the saved hash in database is equal to hashed password that user sends on login.
This question already has answers here:
How to reverse SHA1 Encrypted text [duplicate]
(3 answers)
Closed 9 years ago.
I don't think that my title is appropriate for my question.
My question is I have a simle login system just for test purposes, and I am using sha1 in encrypting my password into my database. which would look like this
sha1($_POST['..some_variable...'])
What would be the best way to retrieve my encrypted password as plain text for authentication purposes.
Like select my username and password from my database.
This should give you a good idea of how it works.
try {
$submittedEmail = !empty($_GET['email']) ? $_GET['email']: false;
$submittedHash = !empty($_GET['password']) ? hash('sha1', $_GET['password']): false;
if (!$submittedEmail || !$submittedHash) {
throw new \Exception('Required field(s) missing. Please try again.');
}
if ($stmt = $mysqli->prepare("SELECT hash FROM user WHERE email = ?")) {
$stmt->bind_param("s", $submittedEmail);
$stmt->execute();
$stmt->bind_result($storedHash);
$stmt->fetch();
$stmt->close();
}
if (!$submittedHash != $storedHash) {
throw new \Exception('Wrong credentials submitted. Please try again.');
}
echo 'User ok!';
} catch (Exception $e) {
echo $e->getMessage();
}
I would however recommend using PHPs password_verify
Since you probably aren't on PHP 5.5 yet you can use this class
When the user creates an account and/or password the first thing you need to do is create a random salt.
$salt = hash_hmac('sha512', "RandomStringHere", "EncryptionKeyHere");
You will store that salt in db along with their encrypted password. From there encrypt the text-based password to and store it in the db.
$encyptPassword = hash_hmac('sha512', "plainTextPassword" . $salt , "EncryptionKeyHere");
So now you have a salt and encrypted password associated with the user.
To authenticate it's as easy as getting the salt associated with the user, taking their un-encrypted password and encrypting it - seeing if it matches.
This way you never know the persons password, just if it matches when they try to log in.