/
pgp.go
114 lines (103 loc) · 2.66 KB
/
pgp.go
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package tool
import (
"crypto/sha256"
"encoding/base64"
"encoding/hex"
"fmt"
"os"
"os/exec"
"path"
)
func GetKeyRing(targetDir string, publicKeys []string) (string, error) {
if _, err := os.Stat(targetDir); err != nil {
// #nosec G301
if err = os.MkdirAll(targetDir, 0o777); err != nil {
return "", err
}
} else {
//nolint //TODO(komish): The intention may have been to return if
// this RemoveAll fails, but we need to be certain. In some cases, RemoveAll
// returns an error that might be ignored. Need to validate. Ignoring for now.
err = os.RemoveAll(targetDir)
}
ringFile := path.Join(targetDir, "keyring.pgp")
keyFileDir := path.Join(targetDir, "key")
if err := os.MkdirAll(keyFileDir, 0o750); err != nil {
return "", err
}
publicKeyFiles, createKeyErr := createKeyFiles(keyFileDir, publicKeys)
if createKeyErr != nil {
return "", createKeyErr
}
for numKeyFile, keyFile := range publicKeyFiles {
if numKeyFile > 0 {
// #nosec G204
cmd := exec.Command("gpg", "--no-default-keyring", "--keyring", ringFile, "--import", keyFile)
err := cmd.Run()
if err != nil {
return "", err
}
if _, err = os.Stat(ringFile); err != nil {
return "", err
}
} else {
// #nosec G204
cmd := exec.Command("gpg", "-o", ringFile, "--dearmor", keyFile)
err := cmd.Run()
if err != nil {
return "", err
}
if _, err = os.Stat(ringFile); err != nil {
return "", err
}
}
}
return ringFile, nil
}
func GetDecodedKey(publicKey string) ([]byte, error) {
dec, err := base64.StdEncoding.DecodeString(publicKey)
if err != nil {
return nil, err
}
return dec, nil
}
func GetEncodedKey(publicKeyFileName string) (string, error) {
if len(publicKeyFileName) == 0 {
return "", nil
}
// #nosec G304
keyBytes, err := os.ReadFile(publicKeyFileName)
if err != nil {
return "", err
}
encodedKey := base64.StdEncoding.EncodeToString(keyBytes)
return encodedKey, nil
}
func GetPublicKeyDigest(publicKey string) (string, error) {
if len(publicKey) == 0 {
return "", nil
}
h := sha256.New()
if _, err := h.Write([]byte(publicKey + "\n")); err != nil {
return "", err
}
return hex.EncodeToString(h.Sum(nil)), nil
}
func createKeyFiles(targetDir string, publicKeys []string) ([]string, error) {
var keyFiles []string
for keyNum, publicKey := range publicKeys {
keyFile := fmt.Sprintf("Pubkey_%d.asc", keyNum)
keyFileName := path.Join(targetDir, keyFile)
decodedKey, err := GetDecodedKey(publicKey)
if err != nil {
return nil, err
}
// #nosec G306
err = os.WriteFile(keyFileName, decodedKey, 0o644)
if err != nil {
return nil, err
}
keyFiles = append(keyFiles, keyFileName)
}
return keyFiles, nil
}