-
Notifications
You must be signed in to change notification settings - Fork 72
/
spadeOpenBSM.c
150 lines (120 loc) · 4.72 KB
/
spadeOpenBSM.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
/*
--------------------------------------------------------------------------------
SPADE - Support for Provenance Auditing in Distributed Environments.
Copyright (C) 2015 SRI International
This program is free software: you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
--------------------------------------------------------------------------------
*/
#include <stdio.h>
#include <stdlib.h>
#include <arpa/inet.h>
#include <bsm/audit.h>
#include <bsm/libbsm.h>
#include <bsm/audit_kevents.h>
#include <sys/ioctl.h>
#include <security/audit/audit_ioctl.h>
int main(int argc, char** argv) {
// User configurable section starts here
FILE* output = stdout;
FILE* errors = stderr;
char* delimiter = ",";
int raw = 1; // Convert raw to string
int shortForm = 0; // Use long form
char* auditPipe = "/dev/auditpipe";
u_int dataFlow = 0x00000001 | 0x00000002 | 0x00000010 | 0x00000020 | 0x00000080 | 0x40000000;
// Class defined in /etc/security/audit_class
// Events in class defined in /etc/security/audit_event
// User configurable section ends here
// Open the audit trail
FILE* auditFile;
int auditFileDescriptor;
auditFile = fopen(auditPipe, "r");
if (auditFile == NULL) {
fprintf(stderr, "Unable to open audit pipe: %s\n", auditPipe);
perror("Error ");
exit(1);
}
auditFileDescriptor = fileno(auditFile);
// Configure the audit pipe
int ioctlReturn;
int mode = AUDITPIPE_PRESELECT_MODE_LOCAL;
ioctlReturn = ioctl(auditFileDescriptor, AUDITPIPE_SET_PRESELECT_MODE, &mode);
if (ioctlReturn == -1) {
fprintf(stderr, "Unable to set the audit pipe mode to local.\n");
perror("Error ");
}
int queueLength;
ioctlReturn = ioctl(auditFileDescriptor, AUDITPIPE_GET_QLIMIT_MAX, &queueLength);
if (ioctlReturn == -1) {
fprintf(stderr, "Unable to get the maximum queue length of the audit pipe.\n");
perror("Error ");
}
ioctlReturn = ioctl(auditFileDescriptor, AUDITPIPE_SET_QLIMIT, &queueLength);
if (ioctlReturn == -1) {
fprintf(stderr, "Unable to set the queue length of the audit pipe.\n");
perror("Error ");
}
u_int attributableEventsMask = dataFlow;
ioctlReturn = ioctl(auditFileDescriptor, AUDITPIPE_SET_PRESELECT_FLAGS, &attributableEventsMask);
if (ioctlReturn == -1) {
fprintf(stderr, "Unable to set the attributable events preselection mask.\n");
perror("Error ");
}
u_int nonAttributableEventsMask = dataFlow;
ioctlReturn = ioctl(auditFileDescriptor, AUDITPIPE_SET_PRESELECT_NAFLAGS, &nonAttributableEventsMask);
if (ioctlReturn == -1) {
fprintf(stderr, "Unable to set the non-attributable events preselection mask.\n");
perror("Error ");
}
// fprintf(output, "Provenance collection has started.\n");
// Start processing audit records
u_char* buffer;
int remainingRecords = 1;
int recordLength;
int recordBalance;
int processedLength;
int tokenCount;
int fetchToken;
tokenstr_t token;
while (remainingRecords) {
// Read an audit record
// Note: au_read_rec() man page incorrectly states return
// value is 0 on success (rather than number of bytes
// read in record)
recordLength = au_read_rec(auditFile, &buffer);
if (recordLength == -1) {
remainingRecords = 0;
break;
}
recordBalance = recordLength;
processedLength = 0;
tokenCount = 0;
while (recordBalance) {
// Extract a token from the record
fetchToken = au_fetch_tok(&token, buffer + processedLength, recordBalance);
if (fetchToken == -1) {
// fprintf(errors, "Error fetching token.\n");
break;
}
// Print the long form of the token as a string
au_print_tok(output, &token, delimiter, raw, shortForm);
fprintf(output, "\n");
tokenCount++;
processedLength += token.len;
recordBalance -= token.len;
}
free(buffer);
// fprintf(output, "\n");
}
fclose(auditFile);
fprintf(output, "Provenance collection has ended.\n");
}