greenplumn be-gssapi-common 源码
greenplumn be-gssapi-common 代码
文件路径：/src/backend/libpq/be-gssapi-common.c
/*-------------------------------------------------------------------------
*
* 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
*
* IDENTIFICATION
* 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;
do
{
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)
ereport(WARNING,
(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.
*/
void
pg_GSS_error_be(int severity, const char *errmsg,
OM_uint32 maj_stat, OM_uint32 min_stat)
{
char msg_major[128],
msg_minor[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.
*/
ereport(severity,
(errmsg_internal("%s", errmsg),
errdetail_internal("%s: %s", msg_major, msg_minor)));
}
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