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|
package request
import (
"bytes"
"fmt"
"os"
"os/exec"
"path/filepath"
"strings"
"github.com/browserpass/browserpass-native/errors"
"github.com/browserpass/browserpass-native/response"
log "github.com/sirupsen/logrus"
)
func fetchDecryptedContents(request *request) {
responseData := response.MakeFetchResponse()
if !strings.HasSuffix(request.File, ".gpg") {
log.Errorf("The requested password file '%v' does not have the expected '.gpg' extension", request.File)
response.SendErrorAndExit(
errors.CodeInvalidPasswordFileExtension,
&map[errors.Field]string{
errors.FieldMessage: "The requested password file does not have the expected '.gpg' extension",
errors.FieldAction: "fetch",
errors.FieldFile: request.File,
},
)
}
store, ok := request.Settings.Stores[request.StoreID]
if !ok {
log.Errorf(
"The password store with ID '%v' is not present in the list of stores '%+v'",
request.StoreID, request.Settings.Stores,
)
response.SendErrorAndExit(
errors.CodeInvalidPasswordStore,
&map[errors.Field]string{
errors.FieldMessage: "The password store is not present in the list of stores",
errors.FieldAction: "fetch",
errors.FieldStoreID: request.StoreID,
},
)
}
normalizedStorePath, err := normalizePasswordStorePath(store.Path)
if err != nil {
log.Errorf(
"The password store '%+v' is not accessible at its location: %+v",
store, err,
)
response.SendErrorAndExit(
errors.CodeInaccessiblePasswordStore,
&map[errors.Field]string{
errors.FieldMessage: "The password store is not accessible",
errors.FieldAction: "fetch",
errors.FieldError: err.Error(),
errors.FieldStoreID: store.ID,
errors.FieldStoreName: store.Name,
errors.FieldStorePath: store.Path,
},
)
}
store.Path = normalizedStorePath
var gpgPath string
if request.Settings.GpgPath != "" || store.Settings.GpgPath != "" {
if request.Settings.GpgPath != "" {
gpgPath = request.Settings.GpgPath
} else {
gpgPath = store.Settings.GpgPath
}
err = validateGpgBinary(gpgPath)
if err != nil {
log.Errorf(
"The provided gpg binary path '%v' is invalid: %+v",
gpgPath, err,
)
response.SendErrorAndExit(
errors.CodeInvalidGpgPath,
&map[errors.Field]string{
errors.FieldMessage: "The provided gpg binary path is invalid",
errors.FieldAction: "fetch",
errors.FieldError: err.Error(),
errors.FieldGpgPath: gpgPath,
},
)
}
} else {
gpgPath, err = detectGpgBinary()
if err != nil {
log.Error("Unable to detect the location of the gpg binary: ", err)
response.SendErrorAndExit(
errors.CodeUnableToDetectGpgPath,
&map[errors.Field]string{
errors.FieldMessage: "Unable to detect the location of the gpg binary",
errors.FieldAction: "fetch",
errors.FieldError: err.Error(),
},
)
}
}
responseData.Contents, err = decryptFile(&store, request.File, gpgPath)
if err != nil {
log.Errorf(
"Unable to decrypt the password file '%v' in the password store '%+v': %+v",
request.File, store, err,
)
response.SendErrorAndExit(
errors.CodeUnableToDecryptPasswordFile,
&map[errors.Field]string{
errors.FieldMessage: "Unable to decrypt the password file",
errors.FieldAction: "fetch",
errors.FieldError: err.Error(),
errors.FieldFile: request.File,
errors.FieldStoreID: store.ID,
errors.FieldStoreName: store.Name,
errors.FieldStorePath: store.Path,
},
)
}
response.SendOk(responseData)
}
func detectGpgBinary() (string, error) {
// Look in $PATH first, then check common locations - the first successful result wins
gpgBinaryPriorityList := []string{
"gpg2", "gpg",
"/bin/gpg2", "/usr/bin/gpg2", "/usr/local/bin/gpg2",
"/bin/gpg", "/usr/bin/gpg", "/usr/local/bin/gpg",
}
for _, binary := range gpgBinaryPriorityList {
err := validateGpgBinary(binary)
if err == nil {
return binary, nil
}
}
return "", fmt.Errorf("Unable to detect the location of the gpg binary to use")
}
func validateGpgBinary(gpgPath string) error {
return exec.Command(gpgPath, "--version").Run()
}
func decryptFile(store *store, file string, gpgPath string) (string, error) {
passwordFilePath := filepath.Join(store.Path, file)
passwordFile, err := os.Open(passwordFilePath)
if err != nil {
return "", err
}
var stdout, stderr bytes.Buffer
gpgOptions := []string{"--decrypt", "--yes", "--quiet", "--batch", "-"}
cmd := exec.Command(gpgPath, gpgOptions...)
cmd.Stdin = passwordFile
cmd.Stdout = &stdout
cmd.Stderr = &stderr
if err := cmd.Run(); err != nil {
return "", fmt.Errorf("Error: %s, Stderr: %s", err.Error(), stderr.String())
}
return stdout.String(), nil
}
|
