/
result.go
166 lines (154 loc) · 3.95 KB
/
result.go
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package rego
import (
"fmt"
"io/fs"
"strconv"
"github.com/aquasecurity/defsec/pkg/scan"
defsecTypes "github.com/aquasecurity/defsec/pkg/types"
"github.com/open-policy-agent/opa/rego"
)
type regoResult struct {
Filepath string
Resource string
StartLine int
EndLine int
SourcePrefix string
Message string
Explicit bool
Managed bool
FSKey string
FS fs.FS
Parent *regoResult
}
func (r regoResult) GetMetadata() defsecTypes.Metadata {
var m defsecTypes.Metadata
if !r.Managed {
m = defsecTypes.NewUnmanagedMetadata()
} else {
rng := defsecTypes.NewRangeWithFSKey(r.Filepath, r.StartLine, r.EndLine, r.SourcePrefix, r.FSKey, r.FS)
if r.Explicit {
m = defsecTypes.NewExplicitMetadata(rng, r.Resource)
} else {
m = defsecTypes.NewMetadata(rng, r.Resource)
}
}
if r.Parent != nil {
return m.WithParent(r.Parent.GetMetadata())
}
return m
}
func (r regoResult) GetRawValue() interface{} {
return nil
}
func parseResult(raw interface{}) *regoResult {
var result regoResult
result.Managed = true
switch val := raw.(type) {
case []interface{}:
var msg string
for _, item := range val {
switch raw := item.(type) {
case map[string]interface{}:
result = parseCause(raw)
case string:
msg = raw
}
}
result.Message = msg
case string:
result.Message = val
case map[string]interface{}:
result = parseCause(val)
default:
result.Message = "Rego policy resulted in DENY"
}
return &result
}
func parseCause(cause map[string]interface{}) regoResult {
var result regoResult
result.Managed = true
if msg, ok := cause["msg"]; ok {
result.Message = fmt.Sprintf("%s", msg)
}
if filepath, ok := cause["filepath"]; ok {
result.Filepath = fmt.Sprintf("%s", filepath)
}
if msg, ok := cause["fskey"]; ok {
result.FSKey = fmt.Sprintf("%s", msg)
}
if msg, ok := cause["resource"]; ok {
result.Resource = fmt.Sprintf("%s", msg)
}
if start, ok := cause["startline"]; ok {
result.StartLine = parseLineNumber(start)
}
if end, ok := cause["endline"]; ok {
result.EndLine = parseLineNumber(end)
}
if prefix, ok := cause["sourceprefix"]; ok {
result.SourcePrefix = fmt.Sprintf("%s", prefix)
}
if explicit, ok := cause["explicit"]; ok {
if set, ok := explicit.(bool); ok {
result.Explicit = set
}
}
if managed, ok := cause["managed"]; ok {
if set, ok := managed.(bool); ok {
result.Managed = set
}
}
if parent, ok := cause["parent"]; ok {
if m, ok := parent.(map[string]interface{}); ok {
parentResult := parseCause(m)
result.Parent = &parentResult
}
}
return result
}
func parseLineNumber(raw interface{}) int {
str := fmt.Sprintf("%s", raw)
n, _ := strconv.Atoi(str)
return n
}
func (s *Scanner) convertResults(set rego.ResultSet, input Input, namespace string, rule string, traces []string) scan.Results {
var results scan.Results
offset := 0
if input.Contents != nil {
if xx, ok := input.Contents.(map[string]interface{}); ok {
if md, ok := xx["__defsec_metadata"]; ok {
if md2, ok := md.(map[string]interface{}); ok {
if sl, ok := md2["offset"]; ok {
offset, _ = sl.(int)
}
}
}
}
}
for _, result := range set {
for _, expression := range result.Expressions {
values, ok := expression.Value.([]interface{})
if !ok {
values = []interface{}{expression.Value}
}
for _, value := range values {
regoResult := parseResult(value)
regoResult.FS = input.FS
if regoResult.Filepath == "" && input.Path != "" {
regoResult.Filepath = input.Path
}
if regoResult.Message == "" {
regoResult.Message = fmt.Sprintf("Rego policy rule: %s.%s", namespace, rule)
}
regoResult.StartLine += offset
regoResult.EndLine += offset
results.AddRego(regoResult.Message, namespace, rule, traces, regoResult)
}
}
}
return results
}
func (s *Scanner) embellishResultsWithRuleMetadata(results scan.Results, metadata StaticMetadata) scan.Results {
results.SetRule(metadata.ToRule())
return results
}