BCrypt.checkpw() Invalid salt version exception

Question

I\'m trying to implement authentication using BCrypt, in my Play 2.1. Java application, but I\'m getting Invalid salt version exception when I\'m trying to authenti

Answer 1

jBcrypt is too old and actually unmaintained. Please consider switching to a new implementation of that library to handle the new $2y$ versions.

I solved this using this pure Java library https://github.com/patrickfav/bcrypt, adding it in my current Scala project.

With the following function I can finally verify the hashes created with VERSION_2Y:

  /**
    * Verifies an encrypted password against the expected value
    *
    * @link https://github.com/patrickfav/bcrypt
    * @param hash The hashed password (encypted with BCrypt version $2Y$)
    * @param password The unencrypted password string
    */
  private def verifyBcryptHash(hash: String, password: String): Boolean = {
    if (hash == null || hash.trim.isEmpty)
      false
    else
      BCrypt
        .verifyer()
        .verifyStrict(
          password.toCharArray(),
          hash.toCharArray(),
          BCrypt.Version.VERSION_2Y
        )
        .verified
  }