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Since GSSAPI and SSPI authentication don't work in protocol version 2, 

issue a helpful error message instead of sending unparsable garbage.
(It is clearly a design error that this doesn't work, but fixing it
is not worth the trouble at this point.)  Per discussion.
This commit is contained in:
Tom Lane 2008-02-08 17:58:46 +00:00
parent 9b43c245e3
commit 81e770857d
1 changed files with 44 additions and 6 deletions
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50
src/backend/libpq/auth.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/libpq/auth.c,v 1.163 2008/01/30 04:11:19 tgl Exp $
* $PostgreSQL: pgsql/src/backend/libpq/auth.c,v 1.164 2008/02/08 17:58:46 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -307,12 +307,13 @@ pg_krb5_recvauth(Port *port)
}
#endif /* KRB5 */
#ifdef ENABLE_GSS
/*----------------------------------------------------------------
* GSSAPI authentication system
*----------------------------------------------------------------
*/
#ifdef ENABLE_GSS
#if defined(HAVE_GSSAPI_H)
#include <gssapi.h>
#else
@ -389,6 +390,19 @@ pg_GSS_recvauth(Port *port)
StringInfoData buf;
gss_buffer_desc gbuf;
/*
* GSS auth is not supported for protocol versions before 3, because it
* relies on the overall message length word to determine the GSS payload
* size in AuthenticationGSSContinue and PasswordMessage messages.
* (This is, in fact, a design error in our GSS support, because protocol
* messages are supposed to be parsable without relying on the length
* word; but it's not worth changing it now.)
*/
if (PG_PROTOCOL_MAJOR(FrontendProtocol) < 3)
ereport(FATAL,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("GSSAPI is not supported in protocol version 2")));
if (pg_krb_server_keyfile && strlen(pg_krb_server_keyfile) > 0)
{
/*
@ -594,7 +608,9 @@ pg_GSS_recvauth(Port *port)
return STATUS_OK;
}
#else /* no ENABLE_GSS */
static int
pg_GSS_recvauth(Port *port)
{
@ -603,9 +619,20 @@ pg_GSS_recvauth(Port *port)
errmsg("GSSAPI not implemented on this server")));
return STATUS_ERROR;
}
#endif /* ENABLE_GSS */
/*----------------------------------------------------------------
* SSPI authentication system
*----------------------------------------------------------------
*/
#ifdef ENABLE_SSPI
typedef SECURITY_STATUS
(WINAPI * QUERY_SECURITY_CONTEXT_TOKEN_FN) (
PCtxtHandle, void **);
static void
pg_SSPI_error(int severity, char *errmsg, SECURITY_STATUS r)
{
@ -621,10 +648,6 @@ pg_SSPI_error(int severity, char *errmsg, SECURITY_STATUS r)
errdetail("%s (%x)", sysmsg, (unsigned int) r)));
}
typedef SECURITY_STATUS
(WINAPI * QUERY_SECURITY_CONTEXT_TOKEN_FN) (
PCtxtHandle, void **);
static int
pg_SSPI_recvauth(Port *port)
{
@ -651,6 +674,18 @@ pg_SSPI_recvauth(Port *port)
HMODULE secur32;
QUERY_SECURITY_CONTEXT_TOKEN_FN _QuerySecurityContextToken;
/*
* SSPI auth is not supported for protocol versions before 3, because it
* relies on the overall message length word to determine the SSPI payload
* size in AuthenticationGSSContinue and PasswordMessage messages.
* (This is, in fact, a design error in our SSPI support, because protocol
* messages are supposed to be parsable without relying on the length
* word; but it's not worth changing it now.)
*/
if (PG_PROTOCOL_MAJOR(FrontendProtocol) < 3)
ereport(FATAL,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("SSPI is not supported in protocol version 2")));
/*
* Acquire a handle to the server credentials.
@ -878,7 +913,9 @@ pg_SSPI_recvauth(Port *port)
return STATUS_OK;
}
#else /* no ENABLE_SSPI */
static int
pg_SSPI_recvauth(Port *port)
{
@ -887,6 +924,7 @@ pg_SSPI_recvauth(Port *port)
errmsg("SSPI not implemented on this server")));
return STATUS_ERROR;
}
#endif /* ENABLE_SSPI */