Use BIO_{get,set}_app_data instead of BIO_{get,set}_data. (#716)

We should have done it this way all along, but we accidentally got
away with using the wrong BIO field up until OpenSSL 3.2.  There,
the library's BIO routines that we rely on use the "data" field
for their own purposes, and our conflicting use causes assorted
weird behaviors up to and including core dumps when SSL connections
are attempted.  Switch to using the approved field for the purpose,
i.e. app_data.

While at it, remove our configure probes for BIO_get_data as well
as the fallback implementation.  BIO_{get,set}_app_data have been
there since long before any OpenSSL version that we still support,
even in the back branches.

Also, update src/test/ssl/t/001_ssltests.pl to allow for a minor
change in an error message spelling that evidently came in with 3.2.

Tristan Partin and Bo Andreson.  Back-patch to all supported branches.

Discussion: https://postgr.es/m/CAN55FZ1eDDYsYaL7mv+oSLUij2h_u6hvD4Qmv-7PK7jkji0uyQ@mail.gmail.com

Cherry-pick into CBDB by wenchaozhang-123

Co-authored-by: Tom Lane <[email protected]>

configure

@@ -14947,7 +14947,7 @@ done
   # defines OPENSSL_VERSION_NUMBER to claim version 2.0.0, even though it
   # doesn't have these OpenSSL 1.1.0 functions. So check for individual
   # functions.
-  for ac_func in OPENSSL_init_ssl BIO_get_data BIO_meth_new ASN1_STRING_get0_data HMAC_CTX_new HMAC_CTX_free
+  for ac_func in OPENSSL_init_ssl BIO_meth_new ASN1_STRING_get0_data HMAC_CTX_new HMAC_CTX_free
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"

configure.ac

@@ -1629,7 +1629,7 @@ if test "$with_ssl" = openssl ; then
   # defines OPENSSL_VERSION_NUMBER to claim version 2.0.0, even though it
   # doesn't have these OpenSSL 1.1.0 functions. So check for individual
   # functions.
-  AC_CHECK_FUNCS([OPENSSL_init_ssl BIO_get_data BIO_meth_new ASN1_STRING_get0_data HMAC_CTX_new HMAC_CTX_free])
+  AC_CHECK_FUNCS([OPENSSL_init_ssl BIO_meth_new ASN1_STRING_get0_data HMAC_CTX_new HMAC_CTX_free])
   # OpenSSL versions before 1.1.0 required setting callback functions, for
   # thread-safety. In 1.1.0, it's no longer required, and CRYPTO_lock()
   # function was removed.

src/backend/libpq/be-secure-openssl.c

@@ -823,11 +823,6 @@ be_tls_write(Port *port, void *ptr, size_t len, int *waitfor)
  * to retry; do we need to adopt their logic for that?
  */
 
-#ifndef HAVE_BIO_GET_DATA
-#define BIO_get_data(bio) (bio->ptr)
-#define BIO_set_data(bio, data) (bio->ptr = data)
-#endif
-
 static BIO_METHOD *my_bio_methods = NULL;
 
 static int
@@ -837,7 +832,7 @@ my_sock_read(BIO *h, char *buf, int size)
 
 	if (buf != NULL)
 	{
-		res = secure_raw_read(((Port *) BIO_get_data(h)), buf, size);
+		res = secure_raw_read(((Port *) BIO_get_app_data(h)), buf, size);
 		BIO_clear_retry_flags(h);
 		if (res <= 0)
 		{
@@ -857,7 +852,7 @@ my_sock_write(BIO *h, const char *buf, int size)
 {
 	int			res = 0;
 
-	res = secure_raw_write(((Port *) BIO_get_data(h)), buf, size);
+	res = secure_raw_write(((Port *) BIO_get_app_data(h)), buf, size);
 	BIO_clear_retry_flags(h);
 	if (res <= 0)
 	{
@@ -933,7 +928,7 @@ my_SSL_set_fd(Port *port, int fd)
 		SSLerr(SSL_F_SSL_SET_FD, ERR_R_BUF_LIB);
 		goto err;
 	}
-	BIO_set_data(bio, port);
+	BIO_set_app_data(bio, port);
 
 	BIO_set_fd(bio, fd, BIO_NOCLOSE);
 	SSL_set_bio(port->ssl, bio, bio);

src/include/pg_config.h.in

@@ -127,9 +127,6 @@
 /* Define to 1 if you have the `backtrace_symbols' function. */
 #undef HAVE_BACKTRACE_SYMBOLS
 
-/* Define to 1 if you have the `BIO_get_data' function. */
-#undef HAVE_BIO_GET_DATA
-
 /* Define to 1 if you have the `BIO_meth_new' function. */
 #undef HAVE_BIO_METH_NEW
 

src/interfaces/libpq/fe-secure-openssl.c

@@ -1663,19 +1663,15 @@ PQsslAttribute(PGconn *conn, const char *attribute_name)
  * to retry; do we need to adopt their logic for that?
  */
 
-#ifndef HAVE_BIO_GET_DATA
-#define BIO_get_data(bio) (bio->ptr)
-#define BIO_set_data(bio, data) (bio->ptr = data)
-#endif
-
+/* protected by ssl_config_mutex */
 static BIO_METHOD *my_bio_methods;
 
 static int
 my_sock_read(BIO *h, char *buf, int size)
 {
 	int			res;
 
-	res = pqsecure_raw_read((PGconn *) BIO_get_data(h), buf, size);
+	res = pqsecure_raw_read((PGconn *) BIO_get_app_data(h), buf, size);
 	BIO_clear_retry_flags(h);
 	if (res < 0)
 	{
@@ -1705,7 +1701,7 @@ my_sock_write(BIO *h, const char *buf, int size)
 {
 	int			res;
 
-	res = pqsecure_raw_write((PGconn *) BIO_get_data(h), buf, size);
+	res = pqsecure_raw_write((PGconn *) BIO_get_app_data(h), buf, size);
 	BIO_clear_retry_flags(h);
 	if (res < 0)
 	{
@@ -1796,7 +1792,7 @@ my_SSL_set_fd(PGconn *conn, int fd)
 		SSLerr(SSL_F_SSL_SET_FD, ERR_R_BUF_LIB);
 		goto err;
 	}
-	BIO_set_data(bio, conn);
+	BIO_set_app_data(bio, conn);
 
 	SSL_set_bio(conn->ssl, bio, bio);
 	BIO_set_fd(bio, fd, BIO_NOCLOSE);

src/test/ssl/t/001_ssltests.pl

@@ -543,7 +543,7 @@
 $node->connect_fails(
 	"$common_connstr user=ssltestuser sslcert=ssl/client-revoked.crt sslkey=ssl/client-revoked_tmp.key",
 	"certificate authorization fails with revoked client cert",
-	expected_stderr => qr/SSL error: sslv3 alert certificate revoked/,
+	expected_stderr => qr|SSL error: ssl[a-z0-9/]* alert certificate revoked|,
 	# revoked certificates should not authenticate the user
 	log_unlike => [qr/connection authenticated:/],);
 
@@ -596,7 +596,7 @@
 $node->connect_fails(
 	"$common_connstr user=ssltestuser sslcert=ssl/client-revoked.crt sslkey=ssl/client-revoked_tmp.key",
 	"certificate authorization fails with revoked client cert with server-side CRL directory",
-	expected_stderr => qr/SSL error: sslv3 alert certificate revoked/);
+	expected_stderr => qr|SSL error: ssl[a-z0-9/]* alert certificate revoked|);
 
 # clean up
 foreach my $key (@keys)

src/tools/msvc/Solution.pm

@@ -229,7 +229,6 @@ sub GenerateFiles
 		HAVE_ATOMICS               => 1,
 		HAVE_ATOMIC_H              => undef,
 		HAVE_BACKTRACE_SYMBOLS     => undef,
-		HAVE_BIO_GET_DATA          => undef,
 		HAVE_BIO_METH_NEW          => undef,
 		HAVE_CLOCK_GETTIME         => undef,
 		HAVE_COMPUTED_GOTO         => undef,
@@ -553,7 +552,6 @@ sub GenerateFiles
 			|| ($digit1 >= '1' && $digit2 >= '1' && $digit3 >= '0'))
 		{
 			$define{HAVE_ASN1_STRING_GET0_DATA} = 1;
-			$define{HAVE_BIO_GET_DATA}          = 1;
 			$define{HAVE_BIO_METH_NEW}          = 1;
 			$define{HAVE_HMAC_CTX_FREE}         = 1;
 			$define{HAVE_HMAC_CTX_NEW}          = 1;