ConstReadonlyCOUNTER_WINDOW: 200ReadonlyENCRYPTED_SENDER_KEY_SIZE: 48ReadonlyHEADER_SIZE: 130ReadonlyMAX_PAYLOAD_SIZE: numberNote ceiling minus the PSK header and the Poly1305 tag.
ReadonlyPROTOCOL_ID: 2ReadonlySESSION_SIZE: 100ReadonlyTAG_SIZE: 16ReadonlyVERSION: 1Legacy PSK envelopes (no header AAD).
ReadonlyVERSION_AAD: 2Current PSK envelopes bind the fixed header as AAD (#232).
PSK protocol constants