pgp: check for signing key before signing time

Check that the signing key exists when the user issues the :sign
command. The signing key ID will be displayed in the security status
also, allowing the user to see what key will be used to sign the
message.

Signed-off-by: Tim Culverhouse <tim@timculverhouse.com>
Tested-by: Jens Grassel <jens@wegtam.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/lib/crypto/gpg/gpgbin/keys.go b/lib/crypto/gpg/gpgbin/keys.go
new file mode 100644
index 00000000..660ce821
--- /dev/null
+++ b/lib/crypto/gpg/gpgbin/keys.go
@@ -0,0 +1,13 @@
+package gpgbin
+
+import "fmt"
+
+// GetPrivateKeyId runs gpg --list-secret-keys s
+func GetPrivateKeyId(s string) (string, error) {
+	private := true
+	id := getKeyId(s, private)
+	if id == "" {
+		return "", fmt.Errorf("no private key found")
+	}
+	return id, nil
+}