(Swift 2) 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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func chilkatTest() {
    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    let crypt = CkoCrypt2()

    var storedHash: String? = "$2a$10$H5kIVktMGzAPKGKNAe9DVu0iwEqfhv/o4MMJ/Dzw/MPy1leOE9NOK"
    var password: String? = "mySecretPassword"

    var passwordValid: Bool = crypt.BCryptVerify(password, bcryptHash: storedHash)
    if passwordValid == true {
        print("\(password!) is valid.")
    }
    else {
        print("\(password!) is NOT valid.")
    }

    password = "notAValidPassword"
    passwordValid = crypt.BCryptVerify(password, bcryptHash: storedHash)
    if passwordValid == true {
        print("\(password!) is valid.")
    }
    else {
        print("\(password!) is NOT valid.")
    }

    // Output should be:

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

}