mirror of
https://github.com/securego/gosec.git
synced 2024-12-26 04:25:52 +00:00
109 lines
3.1 KiB
Go
109 lines
3.1 KiB
Go
// (c) Copyright 2016 Hewlett Packard Enterprise Development LP
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
package core
|
|
|
|
import (
|
|
"encoding/json"
|
|
"fmt"
|
|
"go/ast"
|
|
"os"
|
|
)
|
|
|
|
// Score type used by severity and confidence values
|
|
type Score int
|
|
|
|
const (
|
|
Low Score = iota // Low value
|
|
Medium // Medium value
|
|
High // High value
|
|
)
|
|
|
|
// An Issue is returnd by a GAS rule if it discovers an issue with the scanned code.
|
|
type Issue struct {
|
|
Severity Score `json:"severity"` // issue severity (how problematic it is)
|
|
Confidence Score `json:"confidence"` // issue confidence (how sure we are we found it)
|
|
What string `json:"details"` // Human readable explanation
|
|
File string `json:"file"` // File name we found it in
|
|
Code string `json:"code"` // Impacted code line
|
|
Line int `json:"line"` // Line number in file
|
|
}
|
|
|
|
// MetaData is embedded in all GAS rules. The Severity, Confidence and What message
|
|
// will be passed tbhrough to reported issues.
|
|
type MetaData struct {
|
|
ID string
|
|
Severity Score
|
|
Confidence Score
|
|
What string
|
|
}
|
|
|
|
// MarshalJSON is used convert a Score object into a JSON representation
|
|
func (c Score) MarshalJSON() ([]byte, error) {
|
|
return json.Marshal(c.String())
|
|
}
|
|
|
|
// String converts a Score into a string
|
|
func (c Score) String() string {
|
|
switch c {
|
|
case High:
|
|
return "HIGH"
|
|
case Medium:
|
|
return "MEDIUM"
|
|
case Low:
|
|
return "LOW"
|
|
}
|
|
return "UNDEFINED"
|
|
}
|
|
|
|
func codeSnippet(file *os.File, start int64, end int64, n ast.Node) (string, error) {
|
|
if n == nil {
|
|
return "", fmt.Errorf("Invalid AST node provided")
|
|
}
|
|
|
|
size := (int)(end - start) // Go bug, os.File.Read should return int64 ...
|
|
file.Seek(start, 0)
|
|
|
|
buf := make([]byte, size)
|
|
if nread, err := file.Read(buf); err != nil || nread != size {
|
|
return "", fmt.Errorf("Unable to read code")
|
|
}
|
|
return string(buf), nil
|
|
}
|
|
|
|
// NewIssue creates a new Issue
|
|
func NewIssue(ctx *Context, node ast.Node, desc string, severity Score, confidence Score) *Issue {
|
|
var code string
|
|
fobj := ctx.FileSet.File(node.Pos())
|
|
name := fobj.Name()
|
|
line := fobj.Line(node.Pos())
|
|
|
|
if file, err := os.Open(fobj.Name()); err == nil {
|
|
defer file.Close()
|
|
s := (int64)(fobj.Position(node.Pos()).Offset) // Go bug, should be int64
|
|
e := (int64)(fobj.Position(node.End()).Offset) // Go bug, should be int64
|
|
code, err = codeSnippet(file, s, e, node)
|
|
if err != nil {
|
|
code = err.Error()
|
|
}
|
|
}
|
|
|
|
return &Issue{
|
|
File: name,
|
|
Line: line,
|
|
What: desc,
|
|
Confidence: confidence,
|
|
Severity: severity,
|
|
Code: code,
|
|
}
|
|
}
|