115 lines
2.7 KiB
Go
115 lines
2.7 KiB
Go
package helpers
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import (
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"bytes"
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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)
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func DetectGpgBinary() (string, error) {
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// Look in $PATH first, then check common locations - the first successful result wins
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gpgBinaryPriorityList := []string{
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"gpg2", "gpg",
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"/bin/gpg2", "/usr/bin/gpg2", "/usr/local/bin/gpg2",
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"/bin/gpg", "/usr/bin/gpg", "/usr/local/bin/gpg",
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}
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for _, binary := range gpgBinaryPriorityList {
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err := ValidateGpgBinary(binary)
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if err == nil {
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return binary, nil
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}
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}
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return "", fmt.Errorf("Unable to detect the location of the gpg binary to use")
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}
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func ValidateGpgBinary(gpgPath string) error {
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return exec.Command(gpgPath, "--version").Run()
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}
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func GpgDecryptFile(filePath string, gpgPath string) (string, error) {
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passwordFile, err := os.Open(filePath)
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if err != nil {
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return "", err
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}
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var stdout, stderr bytes.Buffer
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gpgOptions := []string{"--decrypt", "--yes", "--quiet", "--batch", "-"}
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cmd := exec.Command(gpgPath, gpgOptions...)
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cmd.Stdin = passwordFile
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cmd.Stdout = &stdout
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cmd.Stderr = &stderr
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if err := cmd.Run(); err != nil {
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return "", fmt.Errorf("Error: %s, Stderr: %s", err.Error(), stderr.String())
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}
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return stdout.String(), nil
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}
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func GpgEncryptFile(filePath string, contents string, recipients []string, gpgPath string) error {
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err := os.MkdirAll(filepath.Dir(filePath), 0755)
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if err != nil {
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return fmt.Errorf("Unable to create directory structure: %s", err.Error())
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}
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var stdout, stderr bytes.Buffer
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gpgOptions := []string{"--encrypt", "--yes", "--quiet", "--batch", "--output", filePath}
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for _, recipient := range recipients {
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gpgOptions = append(gpgOptions, "--recipient", recipient)
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}
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cmd := exec.Command(gpgPath, gpgOptions...)
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cmd.Stdin = strings.NewReader(contents)
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cmd.Stdout = &stdout
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cmd.Stderr = &stderr
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if err = cmd.Run(); err != nil {
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return fmt.Errorf("Error: %s, Stderr: %s", err.Error(), stderr.String())
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}
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return nil
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}
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func DetectGpgRecipients(filePath string) ([]string, error) {
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dir := filepath.Dir(filePath)
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for {
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file, err := ioutil.ReadFile(filepath.Join(dir, ".gpg-id"))
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if err == nil {
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return strings.Split(strings.ReplaceAll(strings.TrimSpace(string(file)), "\r\n", "\n"), "\n"), nil
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}
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if !os.IsNotExist(err) {
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return nil, fmt.Errorf("Unable to open `.gpg-id` file: %s", err.Error())
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}
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parentDir := filepath.Dir(dir)
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if parentDir == dir {
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return nil, fmt.Errorf("Unable to find '.gpg-id' file")
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}
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dir = parentDir
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}
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}
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func IsDirectoryEmpty(dirPath string) (bool, error) {
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f, err := os.Open(dirPath)
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if err != nil {
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return false, err
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}
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defer f.Close()
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_, err = f.Readdirnames(1)
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if err == io.EOF {
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return true, nil
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}
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return false, err
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}
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