B4X

BCrypt Verify a Password (Check if Password is Correct)

See more Encryption Examples

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.

B4X

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

Dim crypt As ChilkatCrypt2
crypt.Initialize("crypt")

Dim storedHash As String = "$2a$10$H5kIVktMGzAPKGKNAe9DVu0iwEqfhv/o4MMJ/Dzw/MPy1leOE9NOK"
Dim password As String = "mySecretPassword"

Dim passwordValid As Boolean = crypt.BCryptVerify(password, storedHash)
If passwordValid = True Then
    Log(password & " is valid.")
Else
    Log(password & " is NOT valid.")
End If


password = "notAValidPassword"
passwordValid = crypt.BCryptVerify(password, storedHash)
If passwordValid = True Then
    Log(password & " is valid.")
Else
    Log(password & " is NOT valid.")
End If



'  Output should be:

'  	mySecretPassword is valid.
'  	notAValidPassword is NOT valid.