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feat(processor): added key-value and CEF processor (#49)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,44 +1,49 @@ | ||
| package app | ||
|
|
||
| import ( | ||
| filein "github.com/ThoronicLLC/collector/internal/input/file" | ||
| "github.com/ThoronicLLC/collector/internal/input/msgraph" | ||
| pubsubin "github.com/ThoronicLLC/collector/internal/input/pubsub" | ||
| "github.com/ThoronicLLC/collector/internal/input/syslog" | ||
| fileout "github.com/ThoronicLLC/collector/internal/output/file" | ||
| "github.com/ThoronicLLC/collector/internal/output/gcs" | ||
| "github.com/ThoronicLLC/collector/internal/output/log_analytics" | ||
| pubsubout "github.com/ThoronicLLC/collector/internal/output/pubsub" | ||
| "github.com/ThoronicLLC/collector/internal/output/s3" | ||
| "github.com/ThoronicLLC/collector/internal/output/stdout" | ||
| "github.com/ThoronicLLC/collector/internal/processor/cel" | ||
| syslog_processor "github.com/ThoronicLLC/collector/internal/processor/syslog" | ||
| "github.com/ThoronicLLC/collector/pkg/core" | ||
|
|
||
| file_input "github.com/ThoronicLLC/collector/internal/input/file" | ||
| msgraph_input "github.com/ThoronicLLC/collector/internal/input/msgraph" | ||
| pubsub_input "github.com/ThoronicLLC/collector/internal/input/pubsub" | ||
| syslog_input "github.com/ThoronicLLC/collector/internal/input/syslog" | ||
|
|
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| cel_processor "github.com/ThoronicLLC/collector/internal/processor/cel" | ||
| kv_processor "github.com/ThoronicLLC/collector/internal/processor/kv" | ||
| syslog_processor "github.com/ThoronicLLC/collector/internal/processor/syslog" | ||
|
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| file_output "github.com/ThoronicLLC/collector/internal/output/file" | ||
| gcs_output "github.com/ThoronicLLC/collector/internal/output/gcs" | ||
| log_analytics_output "github.com/ThoronicLLC/collector/internal/output/log_analytics" | ||
| pubsub_output "github.com/ThoronicLLC/collector/internal/output/pubsub" | ||
| s3_output "github.com/ThoronicLLC/collector/internal/output/s3" | ||
| stdout_output "github.com/ThoronicLLC/collector/internal/output/stdout" | ||
| ) | ||
|
|
||
| func AddInternalInputs() map[string]core.InputHandler { | ||
| return map[string]core.InputHandler{ | ||
| filein.InputName: filein.Handler(), | ||
| pubsubin.InputName: pubsubin.Handler(), | ||
| syslog.InputName: syslog.Handler(), | ||
| msgraph.InputName: msgraph.Handler(), | ||
| file_input.InputName: file_input.Handler(), | ||
| pubsub_input.InputName: pubsub_input.Handler(), | ||
| syslog_input.InputName: syslog_input.Handler(), | ||
| msgraph_input.InputName: msgraph_input.Handler(), | ||
| } | ||
| } | ||
|
|
||
| func AddInternalProcessors() map[string]core.ProcessHandler { | ||
| return map[string]core.ProcessHandler{ | ||
| cel.ProcessorName: cel.Handler(), | ||
| cel_processor.ProcessorName: cel_processor.Handler(), | ||
| syslog_processor.ProcessorName: syslog_processor.Handler(), | ||
| kv_processor.ProcessorName: kv_processor.Handler(), | ||
| } | ||
| } | ||
|
|
||
| func AddInternalOutputs() map[string]core.OutputHandler { | ||
| return map[string]core.OutputHandler{ | ||
| fileout.OutputName: fileout.Handler(), | ||
| stdout.OutputName: stdout.Handler(), | ||
| s3.OutputName: s3.Handler(), | ||
| gcs.OutputName: gcs.Handler(), | ||
| log_analytics.OutputName: log_analytics.Handler(), | ||
| pubsubout.OutputName: pubsubout.Handler(), | ||
| file_output.OutputName: file_output.Handler(), | ||
| stdout_output.OutputName: stdout_output.Handler(), | ||
| s3_output.OutputName: s3_output.Handler(), | ||
| gcs_output.OutputName: gcs_output.Handler(), | ||
| log_analytics_output.OutputName: log_analytics_output.Handler(), | ||
| pubsub_output.OutputName: pubsub_output.Handler(), | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,143 @@ | ||
| package kv | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "strconv" | ||
| "strings" | ||
|
|
||
| "github.com/dlclark/regexp2" | ||
| ) | ||
|
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||
| type cefEvent struct { | ||
| Version string | ||
| DeviceVendor string | ||
| DeviceProduct string | ||
| DeviceVersion string | ||
| DeviceEventClassId string | ||
| Name string | ||
| Severity string | ||
| Extensions map[string]string | ||
| } | ||
|
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| func parseCef(event string) ([]byte, error) { | ||
| cefMsg, err := cefStringToObject(event) | ||
|
|
||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| // Marshal JSON string | ||
| jsonString, err := json.Marshal(cefMsg) | ||
|
|
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| // Handle errors | ||
| if err != nil { | ||
| fmt.Println(3) | ||
| return nil, err | ||
| } | ||
|
|
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| return jsonString, nil | ||
| } | ||
|
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| func cefStringToObject(cefString string) (*cefEvent, error) { | ||
| // Split by CEF separator | ||
| arr := strings.Split(cefString, "|") | ||
|
|
||
| if len(arr) < 7 { | ||
| return nil, fmt.Errorf("invalid CEF format") | ||
| } | ||
|
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| version := "" | ||
|
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| if strings.Contains(arr[0], ":") { | ||
| // Split first field to validate CEF | ||
| validate := strings.Split(arr[0], ":") | ||
|
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| // Validate that it is a valid CEF message | ||
| if validate[0] != "CEF" { | ||
| return nil, fmt.Errorf("invalid CEF format") | ||
| } | ||
|
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| version = validate[1] | ||
| } else { | ||
| if _, err := strconv.Atoi(arr[0]); err != nil { | ||
| return nil, fmt.Errorf("invalid CEF format") | ||
| } | ||
| version = arr[0] | ||
| } | ||
|
|
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| // Get extensions | ||
| extensions := strings.Join(arr[7:], "|") | ||
|
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| // Replace colons with {{COLON}} | ||
| safeExtensions := strings.ReplaceAll(extensions, ":", "{{COLON}}") | ||
| safeExtensions = strings.ReplaceAll(safeExtensions, `\\=`, "{{EQUAL_ESCAPE_2}}") | ||
| safeExtensions = strings.ReplaceAll(safeExtensions, `\=`, "{{EQUAL_ESCAPE_1}}") | ||
|
|
||
| // Replace non KV spaces with {{SPACE}} | ||
| re := regexp2.MustCompile(`\s(?!([\w\-]+)\=)`, 0) | ||
| safeExtensions2, err := re.Replace(safeExtensions, "{{SPACE}}", -1, -1) | ||
|
|
||
| // Parse extensions in key value format | ||
| keyValueMap, err := parseKeyValue(safeExtensions2, true) | ||
|
|
||
| // Handle error | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| // Restore colons | ||
| newKeyValueMap := make(map[string]string, 0) | ||
| for k, v := range keyValueMap { | ||
| newKey := strings.ReplaceAll(k, `{{SPACE}}`, " ") | ||
| newKey = strings.ReplaceAll(newKey, `{{EQUAL_ESCAPE_1}}`, `\=`) | ||
| newKey = strings.ReplaceAll(newKey, `{{EQUAL_ESCAPE_2}}`, `\\=`) | ||
| newKey = strings.ReplaceAll(newKey, `{{COLON}}`, ":") | ||
|
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| newValue := strings.ReplaceAll(v, `{{SPACE}}`, " ") | ||
| newValue = strings.ReplaceAll(newValue, `{{EQUAL_ESCAPE_1}}`, `\=`) | ||
| newValue = strings.ReplaceAll(newValue, `{{EQUAL_ESCAPE_2}}`, `\\=`) | ||
| newValue = strings.ReplaceAll(newValue, `{{COLON}}`, ":") | ||
| newValue = strings.TrimSpace(newValue) | ||
|
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| newKeyValueMap[newKey] = newValue | ||
| } | ||
|
|
||
| // Build CEF event | ||
| cefEvent := &cefEvent{ | ||
| Version: version, | ||
| DeviceVendor: cefEscapeField(arr[1]), | ||
| DeviceProduct: cefEscapeField(arr[2]), | ||
| DeviceVersion: cefEscapeField(arr[3]), | ||
| DeviceEventClassId: cefEscapeField(arr[4]), | ||
| Name: cefEscapeField(arr[5]), | ||
| Severity: cefEscapeField(arr[6]), | ||
| Extensions: newKeyValueMap, | ||
| } | ||
|
|
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| return cefEvent, nil | ||
| } | ||
|
|
||
| // Unescape CEF fields | ||
| func cefEscapeField(field string) string { | ||
|
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| replacer := strings.NewReplacer( | ||
| "\\\\", "\\", | ||
| "\\|", "|", | ||
| "\\n", "\n", | ||
| ) | ||
|
|
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| return replacer.Replace(field) | ||
| } | ||
|
|
||
| // Unescape CEF extensions | ||
| func cefEscapeExtension(field string) string { | ||
|
|
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| replacer := strings.NewReplacer( | ||
| "\\\\", "\\", | ||
| "\\n", "\n", | ||
| "\\=", "=", | ||
| ) | ||
|
|
||
| return replacer.Replace(field) | ||
| } |
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