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-rw-r--r--src/organize.go291
1 files changed, 0 insertions, 291 deletions
diff --git a/src/organize.go b/src/organize.go
deleted file mode 100644
index 293371b..0000000
--- a/src/organize.go
+++ /dev/null
@@ -1,291 +0,0 @@
1package main
2
3import (
4 "fmt"
5 "os"
6 "regexp"
7 "strconv"
8 "strings"
9 "sync"
10 "syscall"
11
12 "github.com/elastic/go-libaudit/v2"
13 "github.com/elastic/go-libaudit/v2/auparse"
14)
15
16// 为每个事务id存储其信息，事务id在操作系统运行期间是唯一的
17var eventTable sync.Map
18
19// 事件信息
20var tmp any
21var ok bool
22var event Event
23var pEvent *Event
24var eventId, argc int
25
26// var errs [6]error
27
28// 要用的正则匹配列表
29var (
30 syscallRegex = regexp.MustCompile(`audit\((\d+\.\d+):(\d+)\).*?syscall=(\d+)(?:.*?exit=([-+]?\d+))?.*?ppid=(\d+) pid=(\d+).*?subj=(.*?):(.*?):(.*?):(.*?) .*?$`)
31 execveRegex = regexp.MustCompile(`audit\(\d+\.\d+:(\d+)\): argc=(\d+)`)
32 argsRegex = regexp.MustCompile(`a\d+=("(.*?)"|([0-9a-fA-F]+))`)
33 pathRegex = regexp.MustCompile(`audit\(\d+\.\d+:(\d+)\): item=(\d+) name="(.*?)"`)
34 cwdRegex = regexp.MustCompile(`audit\(\d+\.\d+:(\d+)\): cwd="(.*?)"`)
35 proctitleRegex = regexp.MustCompile(`audit\(\d+\.\d+:(\d+)\): proctitle=("(.*?)"|([0-9a-fA-F]+))$`)
36 eoeRegex = regexp.MustCompile(`audit\(\d+\.\d+:(\d+)\)`)
37)
38
39func orgnaze() {
40 defer wg.Done()
41 defer close(cookedChan)
42 // 接收信息
43 var raw interface{}
44 var rawEvent libaudit.RawAuditMessage
45
46 for {
47 raw, ok = <-rawChan
48 if !ok {
49 break
50 }
51 rawEvent = raw.(libaudit.RawAuditMessage)
52 // fmt.Printf("type=%v msg=%s\n", rawEvent.Type, rawEvent.Data)
53
54 switch rawEvent.Type {
55 case auparse.AUDIT_SYSCALL:
56 syscallRaw(rawEvent)
57 case auparse.AUDIT_EXECVE:
58 execve(rawEvent)
59 case auparse.AUDIT_CWD:
60 cwd(rawEvent)
61 case auparse.AUDIT_PATH:
62 path(rawEvent)
63 case auparse.AUDIT_PROCTITLE:
64 proctitle(rawEvent)
65 case auparse.AUDIT_EOE:
66 eoe(rawEvent)
67 default:
68 }
69 }
70}
71
72func syscallRaw(rawEvent libaudit.RawAuditMessage) {
73 if !syscallRegex.Match(rawEvent.Data) {
74 return
75 }
76
77 var exit int
78 var a [4]uint64
79 var subj [4]string
80 // 捕获基础信息
81 match := syscallRegex.FindSubmatch(rawEvent.Data)
82 event.timestamp, _ = getTimeFromStr(string(match[1]))
83 eventId, _ = strconv.Atoi(string(match[2]))
84 event.syscall, _ = strconv.Atoi(string(match[3]))
85 if string(match[4]) == "" {
86 // exit没捕获到
87 exit = 0
88 } else {
89 exit, _ = strconv.Atoi(string(match[4]))
90 }
91 event.ppid, _ = strconv.Atoi(string(match[5]))
92 event.pid, _ = strconv.Atoi(string(match[6]))
93
94 // 几个subj，说不定会有用
95 for i := 0; i < 4; i++ {
96 subj[i] = string(match[7+i])
97 }
98
99 // 捕获参数
100 if !argsRegex.Match(rawEvent.Data) {
101 fmt.Fprintf(os.Stderr, "Error: don't get args in syscall event!\n")
102 return
103 }
104 argsMatch := argsRegex.FindAllSubmatch(rawEvent.Data, -1)
105 for i := 0; i < 4; i++ {
106 a[i], _ = strconv.ParseUint(string(argsMatch[i][3]), 16, 64)
107 }
108
109 switch syscallTable[event.syscall] {
110 case "execve":
111 eventTable.Store(eventId, &Event{
112 tag: EXECVE,
113 timestamp: event.timestamp,
114 syscall: event.syscall,
115 exit_code: a[0],
116 ppid: event.ppid,
117 pid: event.pid,
118 argc: 0,
119 argv: make([]string, 0),
120 cwd: "",
121 })
122 case "open":
123 // 检查打开的权限
124 if a[1]&(syscall.O_APPEND|syscall.O_WRONLY|syscall.O_RDWR|syscall.O_TRUNC) == 0 {
125 break
126 }
127 // TRUNC应该被直接标记为改变，而不是打开
128 eventTable.Store(eventId, &Event{
129 tag: FILEOPEN,
130 timestamp: event.timestamp,
131 syscall: event.syscall,
132 exit_code: uint64(exit),
133 ppid: event.ppid,
134 pid: event.pid,
135 argc: 0,
136 argv: make([]string, 0),
137 cwd: "",
138 syscallParam: a,
139 srcPath: "",
140 })
141 case "write":
142 eventTable.Store(eventId, &Event{
143 tag: FILEWRITE,
144 timestamp: event.timestamp,
145 syscall: event.syscall,
146 exit_code: uint64(exit),
147 ppid: event.ppid,
148 pid: event.pid,
149 argc: 0,
150 argv: make([]string, 0),
151 cwd: "",
152 syscallParam: a,
153 })
154 case "close":
155 // 文件关闭
156 eventTable.Store(eventId, &Event{
157 tag: FILECLOSE,
158 timestamp: event.timestamp,
159 syscall: event.syscall,
160 exit_code: uint64(exit),
161 ppid: event.ppid,
162 pid: event.pid,
163 argc: 0,
164 argv: make([]string, 0),
165 cwd: "",
166 syscallParam: a,
167 })
168 case "pivot_root":
169 if subj[2] == "container_runtime_t" {
170 eventTable.Store(eventId, &Event{
171 tag: PIVOTROOT,
172 timestamp: event.timestamp,
173 syscall: event.syscall,
174 ppid: event.ppid,
175 pid: event.pid,
176 syscallParam: a,
177 })
178 }
179 }
180}
181
182func execve(rawEvent libaudit.RawAuditMessage) {
183 if !execveRegex.Match(rawEvent.Data) {
184 return
185 }
186
187 match := execveRegex.FindSubmatch(rawEvent.Data)
188 eventId, _ = strconv.Atoi(string(match[1]))
189 argc, _ = strconv.Atoi(string(match[2]))
190 tmp, ok = eventTable.Load(eventId)
191 if !ok {
192 return
193 }
194 pEvent = tmp.(*Event)
195 if argsRegex.Match(rawEvent.Data) {
196 match := argsRegex.FindAllSubmatch(rawEvent.Data, -1)
197 for i := 0; i < argc; i++ {
198 if len(match[i][2]) == 0 {
199 // 代表着匹配到的是十六进制数
200 str := hexToAscii(string(match[i][3]))
201 pEvent.argv = append(pEvent.argv, str)
202 } else {
203 pEvent.argv = append(pEvent.argv, string(match[i][2]))
204 }
205 }
206 pEvent.argc = argc
207 }
208}
209
210func cwd(rawEvent libaudit.RawAuditMessage) {
211 if !cwdRegex.Match(rawEvent.Data) {
212 return
213 }
214
215 match := cwdRegex.FindSubmatch(rawEvent.Data)
216 eventId, _ = strconv.Atoi(string(match[1]))
217 tmp, ok = eventTable.Load(eventId)
218 if !ok {
219 return
220 }
221 tmp.(*Event).cwd = string(match[2])
222}
223
224func proctitle(rawEvent libaudit.RawAuditMessage) {
225 if !proctitleRegex.Match(rawEvent.Data) {
226 return
227 }
228
229 var cmdline string
230 match := proctitleRegex.FindSubmatch(rawEvent.Data)
231 eventId, _ = strconv.Atoi(string(match[1]))
232 tmp, ok = eventTable.Load(eventId)
233 if !ok {
234 return
235 }
236 pEvent = tmp.(*Event)
237 if pEvent.argc == 0 {
238 // 只有等于0，才证明没经过EXECVE提取参数，才允许使用PROCTITLE提取参数
239 if match[3] == nil {
240 // PROCTITLE写的是十六进制，转换为字符串
241 cmdline = hexToAscii(string(match[4]))
242 } else {
243 cmdline = string(match[3])
244 }
245 pEvent.argv = strings.Split(cmdline, " ")
246 pEvent.argc = len(pEvent.argv)
247 }
248}
249
250func eoe(rawEvent libaudit.RawAuditMessage) {
251 if !eoeRegex.Match(rawEvent.Data) {
252 return
253 }
254
255 match := eoeRegex.FindSubmatch(rawEvent.Data)
256 eventId, _ = strconv.Atoi(string(match[1]))
257 tmp, ok = eventTable.Load(eventId)
258 if !ok {
259 return
260 }
261 cooked := *(tmp.(*Event))
262 cookedChan <- cooked
263 eventTable.Delete(eventId) // 死人别占地
264}
265
266func path(rawEvent libaudit.RawAuditMessage) {
267 if !pathRegex.Match(rawEvent.Data) {
268 return
269 }
270 match := pathRegex.FindSubmatch(rawEvent.Data)
271 eventId, _ = strconv.Atoi(string(match[1]))
272 // item, _ := strconv.Atoi(string(match[2]))
273 name := string(match[3])
274
275 tmp, ok = eventTable.Load(eventId)
276 if !ok {
277 return
278 }
279 pEvent = tmp.(*Event)
280
281 // 先看看是不是文件操作
282 if pEvent.tag != FILEOPEN {
283 return
284 }
285
286 if name[0] == '/' {
287 pEvent.srcPath = name
288 } else {
289 pEvent.srcPath += "/" + name
290 }
291}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-01-09 12:36:05 +0800