pgcrypto: Split off pgp-encrypt-md5 test

In FIPS mode, these tests will fail.  By having them in a separate
file, it would make it easier to have an alternative output file or
selectively disable these tests.  This isn't done here; this is just
some preparation.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/2766054.1700080156@sss.pgh.pa.us

contrib/pgcrypto/Makefile

@@ -42,7 +42,7 @@ PGFILEDESC = "pgcrypto - cryptographic functions"
 REGRESS = init md5 sha1 hmac-md5 hmac-sha1 blowfish rijndael \
 	sha2 des 3des cast5 \
 	crypt-des crypt-md5 crypt-blowfish crypt-xdes \
-	pgp-armor pgp-decrypt pgp-encrypt $(CF_PGP_TESTS) \
+	pgp-armor pgp-decrypt pgp-encrypt pgp-encrypt-md5 $(CF_PGP_TESTS) \
 	pgp-pubkey-decrypt pgp-pubkey-encrypt pgp-info
 
 EXTRA_CLEAN = gen-rtab

contrib/pgcrypto/expected/pgp-encrypt-md5.out

@@ -0,0 +1,11 @@
+--
+-- PGP encrypt using MD5
+--
+select pgp_sym_decrypt(
+	pgp_sym_encrypt('Secret.', 'key', 's2k-digest-algo=md5'),
+	'key', 'expect-s2k-digest-algo=md5');
+ pgp_sym_decrypt 
+-----------------
+ Secret.
+(1 row)
+

contrib/pgcrypto/expected/pgp-encrypt.out

@@ -121,14 +121,6 @@ NOTICE:  pgp_decrypt: unexpected s2k_count: expected 65000000 got 65011712
 (1 row)
 
 -- s2k digest change
-select pgp_sym_decrypt(
-	pgp_sym_encrypt('Secret.', 'key', 's2k-digest-algo=md5'),
-	'key', 'expect-s2k-digest-algo=md5');
- pgp_sym_decrypt 
------------------
- Secret.
-(1 row)
-
 select pgp_sym_decrypt(
 		pgp_sym_encrypt('Secret.', 'key', 's2k-digest-algo=sha1'),
 	'key', 'expect-s2k-digest-algo=sha1');

contrib/pgcrypto/meson.build

@@ -48,6 +48,7 @@ pgcrypto_regress = [
   'pgp-armor',
   'pgp-decrypt',
   'pgp-encrypt',
+  'pgp-encrypt-md5',
   'pgp-pubkey-decrypt',
   'pgp-pubkey-encrypt',
   'pgp-info',

contrib/pgcrypto/sql/pgp-encrypt-md5.sql

@@ -0,0 +1,7 @@
+--
+-- PGP encrypt using MD5
+--
+
+select pgp_sym_decrypt(
+	pgp_sym_encrypt('Secret.', 'key', 's2k-digest-algo=md5'),
+	'key', 'expect-s2k-digest-algo=md5');

contrib/pgcrypto/sql/pgp-encrypt.sql

@@ -63,9 +63,6 @@ select pgp_sym_decrypt(
 	'key', 'expect-s2k-count=65000000');
 
 -- s2k digest change
-select pgp_sym_decrypt(
-	pgp_sym_encrypt('Secret.', 'key', 's2k-digest-algo=md5'),
-	'key', 'expect-s2k-digest-algo=md5');
 select pgp_sym_decrypt(
 		pgp_sym_encrypt('Secret.', 'key', 's2k-digest-algo=sha1'),
 	'key', 'expect-s2k-digest-algo=sha1');