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forked from tangled.org/core
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Go
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import ( "flag" "fmt" "io" "os" "strings"
"tangled.sh/tangled.sh/core/crypto")
func parseCommitObject(commitData string) (string, string, error) { lines := strings.Split(commitData, "\n")
var payloadLines []string var signatureLines []string var inSignature bool var foundSignature bool
for _, line := range lines { if strings.HasPrefix(line, "gpgsig ") { foundSignature = true inSignature = true // remove 'gpgsig' prefix sigLine := strings.TrimPrefix(line, "gpgsig ") signatureLines = append(signatureLines, sigLine) continue }
if inSignature { // check if this line is part of the signature (starts with space) if strings.HasPrefix(line, " ") { // remove the leading space and add to signature sigLine := strings.TrimPrefix(line, " ") signatureLines = append(signatureLines, sigLine) continue } else { // end of signature block inSignature = false // this line is part of payload, so add it payloadLines = append(payloadLines, line) } } else { // regular payload line payloadLines = append(payloadLines, line) } }
if !foundSignature { return "", commitData, nil // no signature found, return empty signature and full data as payload }
signature := strings.Join(signatureLines, "\n") payload := strings.Join(payloadLines, "\n")
return signature, payload, nil}
func main() { var pubkeyPath string flag.StringVar(&pubkeyPath, "pubkey", "", "Path to the public key file") flag.Parse()
var pubKey []byte var err error if pubkeyPath != "" { pubKey, err = os.ReadFile(pubkeyPath) if err != nil { fmt.Fprintf(os.Stderr, "error reading public key file: %v\n", err) os.Exit(1) } }
input, err := io.ReadAll(os.Stdin) if err != nil { fmt.Fprintf(os.Stderr, "error reading from stdin: %v\n", err) os.Exit(1) }
commitData := string(input)
signature, payload, err := parseCommitObject(commitData) if err != nil { fmt.Fprintf(os.Stderr, "error parsing commit: %v\n", err) os.Exit(1) }
fmt.Println("signature") fmt.Println(signature) fmt.Println() fmt.Println("payload:") fmt.Println(payload)
err, ok := crypto.VerifySignature(pubKey, []byte(signature), []byte(payload)) if err != nil { fmt.Fprintf(os.Stderr, "%v\n", err) os.Exit(1) } if ok { fmt.Println("ok") }}