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c8e1ba736b
Backpatch-through: 11
95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
/*-------------------------------------------------------------------------
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*
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* be-gssapi-common.c
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* Common code for GSSAPI authentication and encryption
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*
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* Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* IDENTIFICATION
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* src/backend/libpq/be-gssapi-common.c
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "libpq/be-gssapi-common.h"
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/*
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* Fetch all errors of a specific type and append to "s" (buffer of size len).
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* If we obtain more than one string, separate them with spaces.
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* Call once for GSS_CODE and once for MECH_CODE.
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*/
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static void
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pg_GSS_error_int(char *s, size_t len, OM_uint32 stat, int type)
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{
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gss_buffer_desc gmsg;
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size_t i = 0;
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OM_uint32 lmin_s,
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msg_ctx = 0;
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do
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{
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if (gss_display_status(&lmin_s, stat, type, GSS_C_NO_OID,
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&msg_ctx, &gmsg) != GSS_S_COMPLETE)
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break;
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if (i > 0)
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{
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if (i < len)
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s[i] = ' ';
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i++;
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}
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if (i < len)
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memcpy(s + i, gmsg.value, Min(len - i, gmsg.length));
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i += gmsg.length;
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gss_release_buffer(&lmin_s, &gmsg);
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}
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while (msg_ctx);
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/* add nul termination */
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if (i < len)
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s[i] = '\0';
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else
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{
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elog(COMMERROR, "incomplete GSS error report");
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s[len - 1] = '\0';
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}
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}
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/*
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* Report the GSSAPI error described by maj_stat/min_stat.
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*
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* errmsg should be an already-translated primary error message.
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* The GSSAPI info is appended as errdetail.
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*
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* The error is always reported with elevel COMMERROR; we daren't try to
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* send it to the client, as that'd likely lead to infinite recursion
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* when elog.c tries to write to the client.
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*
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* To avoid memory allocation, total error size is capped (at 128 bytes for
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* each of major and minor). No known mechanisms will produce error messages
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* beyond this cap.
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*/
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void
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pg_GSS_error(const char *errmsg,
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OM_uint32 maj_stat, OM_uint32 min_stat)
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{
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char msg_major[128],
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msg_minor[128];
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/* Fetch major status message */
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pg_GSS_error_int(msg_major, sizeof(msg_major), maj_stat, GSS_C_GSS_CODE);
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/* Fetch mechanism minor status message */
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pg_GSS_error_int(msg_minor, sizeof(msg_minor), min_stat, GSS_C_MECH_CODE);
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/*
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* errmsg_internal, since translation of the first part must be done
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* before calling this function anyway.
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*/
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ereport(COMMERROR,
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(errmsg_internal("%s", errmsg),
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errdetail_internal("%s: %s", msg_major, msg_minor)));
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}
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