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35 lines
1.4 KiB
Go
35 lines
1.4 KiB
Go
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package abstract
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// The Scheme interface provides an abstract interface to an implementation
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// of a particular password hashing scheme. The Scheme generates password
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// hashes from passwords, verifies passwords using password hashes, randomly
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// generates new stubs and can determines whether it recognises a given
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// stub or hash. It may also decide to issue upgrades.
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type Scheme interface {
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// Hashes a plaintext UTF-8 password using a modular crypt stub. Returns the
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// hashed password in modular crypt format.
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//
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// A modular crypt stub is a prefix of a hash in modular crypt format which
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// expresses all necessary configuration information, such as salt and
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// iteration count. For example, for sha256-crypt, a valid stub would be:
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//
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// $5$rounds=6000$salt
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//
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// A full modular crypt hash may also be passed as the stub, in which case
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// the hash is ignored.
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Hash(password string) (string, error)
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// Verifies a plaintext UTF-8 password using a modular crypt hash. Returns
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// an error if the inputs are malformed or the password does not match.
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Verify(password, hash string) (err error)
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// Returns true iff this crypter supports the given stub.
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SupportsStub(stub string) bool
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// Returns true iff this stub needs an update.
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NeedsUpdate(stub string) bool
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// Make a stub with the configured defaults. The salt is generated randomly.
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//MakeStub() (string, error)
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}
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