A class to store all informations about the existing
password found in the cache or get from the backend.
This is necessary as we have to compute :
- the used algorithm
- the salt if any
- the password itself.
If we have a on-way encrypted password, it is stored using this
where the encrypted password format can be :
- MD5/SHA : base64()
- SMD5/SSH : base64()
- crypt :
Algorithm are currently MD5, SMD5, SHA, SSHA, SHA2, SSHA-2 (except SHA-224), CRYPT and empty