pgcrypto: Remove non-OpenSSL support

pgcrypto had internal implementations of some encryption algorithms,
as an alternative to calling out to OpenSSL.  These were rarely used,
since most production installations are built with OpenSSL.  Moreover,
maintaining parallel code paths makes the code more complex and
difficult to maintain.

This patch removes these internal implementations.  Now, pgcrypto is
only built if OpenSSL support is configured.

Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://www.postgresql.org/message-id/flat/0b42f1df-8cba-6a30-77d7-acc241cc88c1%40enterprisedb.com

contrib/Makefile

@@ -36,7 +36,6 @@ SUBDIRS = \
 		pg_stat_statements \
 		pg_surgery	\
 		pg_trgm		\
-		pgcrypto	\
 		pgrowlocks	\
 		pgstattuple	\
 		pg_visibility	\
@@ -52,9 +51,9 @@ SUBDIRS = \
 		vacuumlo
 
 ifeq ($(with_ssl),openssl)
-SUBDIRS += sslinfo
+SUBDIRS += pgcrypto sslinfo
 else
-ALWAYS_SUBDIRS += sslinfo
+ALWAYS_SUBDIRS += pgcrypto sslinfo
 endif
 
 ifneq ($(with_uuid),no)

contrib/pgcrypto/Makefile

@@ -1,56 +1,46 @@
 # contrib/pgcrypto/Makefile
 
-INT_SRCS = internal.c internal-sha2.c blf.c rijndael.c \
-		pgp-mpi-internal.c imath.c
-INT_TESTS = sha2
-
-OSSL_SRCS = openssl.c pgp-mpi-openssl.c
-OSSL_TESTS = sha2 des 3des cast5
-
 ZLIB_TST = pgp-compression
 ZLIB_OFF_TST = pgp-zlib-DISABLED
 
-CF_SRCS = $(if $(subst openssl,,$(with_ssl)), $(INT_SRCS), $(OSSL_SRCS))
-CF_TESTS = $(if $(subst openssl,,$(with_ssl)), $(INT_TESTS), $(OSSL_TESTS))
 CF_PGP_TESTS = $(if $(subst no,,$(with_zlib)), $(ZLIB_TST), $(ZLIB_OFF_TST))
 
-SRCS = \
-	$(CF_SRCS) \
-	crypt-blowfish.c \
-	crypt-des.c \
-	crypt-gensalt.c \
-	crypt-md5.c \
-	mbuf.c \
-	pgcrypto.c \
-	pgp-armor.c \
-	pgp-cfb.c \
-	pgp-compress.c \
-	pgp-decrypt.c \
-	pgp-encrypt.c \
-	pgp-info.c \
-	pgp-mpi.c \
-	pgp-pgsql.c \
-	pgp-pubdec.c \
-	pgp-pubenc.c \
-	pgp-pubkey.c \
-	pgp-s2k.c \
-	pgp.c \
-	px-crypt.c \
-	px-hmac.c \
-	px.c
+OBJS = \
+	$(WIN32RES) \
+	crypt-blowfish.o \
+	crypt-des.o \
+	crypt-gensalt.o \
+	crypt-md5.o \
+	mbuf.o \
+	openssl.o \
+	pgcrypto.o \
+	pgp-armor.o \
+	pgp-cfb.o \
+	pgp-compress.o \
+	pgp-decrypt.o \
+	pgp-encrypt.o \
+	pgp-info.o \
+	pgp-mpi.o \
+	pgp-mpi-openssl.o \
+	pgp-pgsql.o \
+	pgp-pubdec.o \
+	pgp-pubenc.o \
+	pgp-pubkey.o \
+	pgp-s2k.o \
+	pgp.o \
+	px-crypt.o \
+	px-hmac.o \
+	px.o
 
 MODULE_big	= pgcrypto
-OBJS = \
-	$(SRCS:.c=.o) \
-	$(WIN32RES)
 
 EXTENSION = pgcrypto
 DATA = pgcrypto--1.3.sql pgcrypto--1.2--1.3.sql pgcrypto--1.1--1.2.sql \
 	pgcrypto--1.0--1.1.sql
 PGFILEDESC = "pgcrypto - cryptographic functions"
 
 REGRESS = init md5 sha1 hmac-md5 hmac-sha1 blowfish rijndael \
-	$(CF_TESTS) \
+	sha2 des 3des cast5 \
 	crypt-des crypt-md5 crypt-blowfish crypt-xdes \
 	pgp-armor pgp-decrypt pgp-encrypt $(CF_PGP_TESTS) \
 	pgp-pubkey-decrypt pgp-pubkey-encrypt pgp-info
@@ -77,12 +67,3 @@ SHLIB_LINK += $(filter -leay32, $(LIBS))
 # those must be at the end
 SHLIB_LINK += -lws2_32
 endif
-
-# Upstream uses a larger subset of C99.
-imath.o: CFLAGS+=$(PERMIT_DECLARATION_AFTER_STATEMENT)
-
-rijndael.o: rijndael.tbl
-
-rijndael.tbl:
-	$(CC) $(CPPFLAGS) $(CFLAGS) -DPRINT_TABS rijndael.c -o gen-rtab
-	./gen-rtab > rijndael.tbl