/usr/share/postgresql/10/extension/pgcrypto--1.1--1.2.sql is in postgresql-10 10.6-0ubuntu0.18.04.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | /* contrib/pgcrypto/pgcrypto--1.1--1.2.sql */
-- complain if script is sourced in psql, rather than via ALTER EXTENSION
\echo Use "ALTER EXTENSION pgcrypto UPDATE TO '1.2'" to load this file. \quit
CREATE FUNCTION armor(bytea, text[], text[])
RETURNS text
AS 'MODULE_PATHNAME', 'pg_armor'
LANGUAGE C IMMUTABLE STRICT;
CREATE FUNCTION pgp_armor_headers(text, key OUT text, value OUT text)
RETURNS SETOF record
AS 'MODULE_PATHNAME', 'pgp_armor_headers'
LANGUAGE C IMMUTABLE STRICT;
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