(C#) BCrypt Verify a Password (Check if Password is Correct)

A system that uses BCrypt for storing passwords would not store the actual password, but would instead store the bcrypt hash of the password. When a user presents the password, such as for login, call BCryptVerify to verify the password against the stored bcrypt hash.

Note: This example requires Chilkat v9.5.0.65 or greater.

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// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.Crypt2 crypt = new Chilkat.Crypt2();

string storedHash = "$2a$10$H5kIVktMGzAPKGKNAe9DVu0iwEqfhv/o4MMJ/Dzw/MPy1leOE9NOK";
string password = "mySecretPassword";

bool passwordValid = crypt.BCryptVerify(password,storedHash);
if (passwordValid == true) {
    Debug.WriteLine(password + " is valid.");
}
else {
    Debug.WriteLine(password + " is NOT valid.");
}

password = "notAValidPassword";
passwordValid = crypt.BCryptVerify(password,storedHash);
if (passwordValid == true) {
    Debug.WriteLine(password + " is valid.");
}
else {
    Debug.WriteLine(password + " is NOT valid.");
}

// Output should be:

// 	mySecretPassword is valid.
// 	notAValidPassword is NOT valid.