Returns a string for mapping an int to the corresponding base 64 character. File core/lib/Drupal/Cor

The maximum allowed log2 number of iterations for password stretching. File core/lib/Drupal/Core/Pas

Specifies the number of times the hashing function will be applied when generating new password hashes. The number of times is calculated by raising 2 to the power of the given

public PhpassHashedPassword::needsRehash($hash)

protected PhpassHashedPassword::generateSalt()