Verifier is a derivative of the password. It is resistant to dictionary attacks and can not be used for authentication (only its verifying).
SOURCE = PBKDF2(SALT=PeerId, PASSWORD, 1<<16, SHA512) PUB, PRIV = Ed25519.Generate(SOURCE)
Verifier is PUB
public key of Ed25519 generated from the PBKDF2
of the passphrase in hexadecimal encoding. PeerId
is used as a
128-bit salt. Server stores and knows only verifier. Client can compute
the whole keypair every time he makes handshake.