136 lines
3.8 KiB
C
136 lines
3.8 KiB
C
/*
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* SPDX-FileCopyrightText: 2005 , Red Hat, Inc.
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* SPDX-FileCopyrightText: 2005 , Tomasz Kłoczko
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* SPDX-FileCopyrightText: 2008 , Nicolas François
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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/*
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* Audit helper functions used throughout shadow
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*
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*/
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#include <config.h>
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#ifdef WITH_AUDIT
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#include <stdlib.h>
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#include <syslog.h>
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#include <stdarg.h>
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#include <libaudit.h>
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#include <errno.h>
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#include <stdio.h>
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#include "attr.h"
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#include "prototypes.h"
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#include "shadowlog.h"
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#include "string/sprintf/snprintf.h"
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int audit_fd;
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void audit_help_open (void)
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{
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audit_fd = audit_open ();
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if (audit_fd < 0) {
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/* You get these only when the kernel doesn't have
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* audit compiled in. */
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if ( (errno == EINVAL)
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|| (errno == EPROTONOSUPPORT)
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|| (errno == EAFNOSUPPORT)) {
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return;
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}
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(void) fputs (_("Cannot open audit interface - aborting.\n"),
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log_get_logfd());
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exit (EXIT_FAILURE);
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}
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}
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/*
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* This function will log a message to the audit system using a predefined
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* message format. For additional information on the user account lifecycle
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* events check
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* <https://github.com/linux-audit/audit-documentation/wiki/SPEC-User-Account-Lifecycle-Events>
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*
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* Parameter usage is as follows:
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*
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* type - type of message. A list of possible values is available in
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* "audit-records.h" file.
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* pgname - program's name
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* op - operation. "adding user", "changing finger info", "deleting group"
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* name - user's account or group name. If not available use NULL.
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* id - uid or gid that the operation is being performed on. This is used
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* only when user is NULL.
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*/
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void audit_logger (int type, MAYBE_UNUSED const char *pgname, const char *op,
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const char *name, unsigned int id,
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shadow_audit_result result)
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{
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if (audit_fd < 0) {
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return;
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} else {
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audit_log_acct_message (audit_fd, type, NULL, op, name, id,
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NULL, NULL, NULL, result);
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}
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}
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/*
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* This function will log a message to the audit system using a predefined
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* message format. For additional information on the group account lifecycle
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* events check
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* <https://github.com/linux-audit/audit-documentation/wiki/SPEC-User-Account-Lifecycle-Events>
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*
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* Parameter usage is as follows:
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*
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* type - type of message. A list of possible values is available in
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* "audit-records.h" file.
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* op - operation. "adding-user", "modify-group", "deleting-user-from-group"
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* name - user's account or group name. If not available use NULL.
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* id - uid or gid that the operation is being performed on. This is used
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* only when user is NULL.
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* grp_type - type of group: "grp" or "new_group"
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* grp - group name associated with event
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*/
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void
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audit_logger_with_group(int type, const char *op, const char *name,
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id_t id, const char *grp_type, const char *grp,
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shadow_audit_result result)
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{
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int len;
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char enc_group[GROUP_NAME_MAX_LENGTH * 2 + 1];
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char buf[NITEMS(enc_group) + 100];
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if (audit_fd < 0)
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return;
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len = strnlen(grp, sizeof(enc_group)/2);
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if (audit_value_needs_encoding(grp, len)) {
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SNPRINTF(buf, "%s %s=%s", op, grp_type,
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audit_encode_value(enc_group, grp, len));
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} else {
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SNPRINTF(buf, "%s %s=\"%s\"", op, grp_type, grp);
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}
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audit_log_acct_message(audit_fd, type, NULL, buf, name, id,
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NULL, NULL, NULL, result);
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}
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void audit_logger_message (const char *message, shadow_audit_result result)
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{
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if (audit_fd < 0) {
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return;
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} else {
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audit_log_user_message (audit_fd,
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AUDIT_USYS_CONFIG,
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message,
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NULL, /* hostname */
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NULL, /* addr */
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NULL, /* tty */
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result);
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}
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}
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#else /* WITH_AUDIT */
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extern int ISO_C_forbids_an_empty_translation_unit;
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#endif /* WITH_AUDIT */
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