Raise fixed token-length limit in hba.c.

Historically, hba.c limited tokens in the authentication configuration
files (pg_hba.conf and pg_ident.conf) to less than 256 bytes.  We have
seen a few reports of this limit causing problems; notably, for
moderately-complex LDAP configurations.  Increase the limit to 10240
bytes as a low-risk stop-gap solution.

In v13 and earlier, this also requires raising MAX_LINE, the limit
on overall line length.  I'm hesitant to make this code consume
too much stack space, so I only raised that to 20480 bytes.

Discussion: https://postgr.es/m/1588937.1690221208@sss.pgh.pa.us

diff --git a/src/backend/libpq/hba.c b/src/backend/libpq/hba.c
index 9d5d9ccd231e2a5cb3c06d1c933c7131bdd16ebc..3b948c48cc0624f05fb4d1ee2efa9e98b3215abb 100644 (file)
--- a/src/backend/libpq/hba.c
+++ b/src/backend/libpq/hba.c
@@ -53,8 +53,8 @@
 #endif
 
 
-#define MAX_TOKEN      256
-#define MAX_LINE       8192
+#define MAX_TOKEN      10240
+#define MAX_LINE       20480
 
 /* callback data for check_network_callback */
 typedef struct check_network_data