greenplumn be-gssapi-common 源码

  • 2022-08-18
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greenplumn be-gssapi-common 代码


 * be-gssapi-common.c
 *     Common code for GSSAPI authentication and encryption
 * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *       src/backend/libpq/be-gssapi-common.c

#include "postgres.h"

#include "libpq/be-gssapi-common.h"

 * Helper function for getting all strings of a GSSAPI error (of specified
 * stat).  Call once for GSS_CODE and once for MECH_CODE.
static void
pg_GSS_error_int(char *s, size_t len, OM_uint32 stat, int type)
	gss_buffer_desc gmsg;
	size_t		i = 0;
	OM_uint32	lmin_s,
				msg_ctx = 0;

	gmsg.value = NULL;
	gmsg.length = 0;

		gss_display_status(&lmin_s, stat, type,
						   GSS_C_NO_OID, &msg_ctx, &gmsg);
		strlcpy(s + i, gmsg.value, len - i);
		i += gmsg.length;
		gss_release_buffer(&lmin_s, &gmsg);
	while (msg_ctx && i < len);

	if (msg_ctx || i == len)
				(errmsg_internal("incomplete GSS error report")));

 * Fetch and report all error messages from GSSAPI.  To avoid allocation,
 * total error size is capped (at 128 bytes for each of major and minor).  No
 * known mechanisms will produce error messages beyond this cap.
 * In GPDB backend, we also link with fe-gssapi-common.o, which contains
 * this same function. Rename it with a "_be" suffix here to avoid linker error.
pg_GSS_error_be(int severity, const char *errmsg,
			 OM_uint32 maj_stat, OM_uint32 min_stat)
	char		msg_major[128],

	/* Fetch major status message */
	pg_GSS_error_int(msg_major, sizeof(msg_major), maj_stat, GSS_C_GSS_CODE);

	/* Fetch mechanism minor status message */
	pg_GSS_error_int(msg_minor, sizeof(msg_minor), min_stat, GSS_C_MECH_CODE);

	 * errmsg_internal, since translation of the first part must be done
	 * before calling this function anyway.
			(errmsg_internal("%s", errmsg),
			 errdetail_internal("%s: %s", msg_major, msg_minor)));


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