postgresql/contrib/pgcrypto/pgcrypto.sql.in

-- drop function digest(text, text);
-- drop function digest_exists(text);

CREATE FUNCTION digest(text, text) RETURNS text
  AS '@MODULE_FILENAME@',
  'digest' LANGUAGE 'C';

CREATE FUNCTION digest_exists(text) RETURNS bool
  AS '@MODULE_FILENAME@',
  'digest_exists' LANGUAGE 'C';