1 files changed, 34 insertions, 0 deletions
diff --git a/lib/crypto/gpg/gpgbin/decrypt.go b/lib/crypto/gpg/gpgbin/decrypt.go
new file mode 100644
index 00000000..4b8d8f2b
--- /dev/null
+++ b/lib/crypto/gpg/gpgbin/decrypt.go
@@ -0,0 +1,34 @@
+package gpgbin
+
+import (
+	"bytes"
+	"io"
+	"io/ioutil"
+
+	"git.sr.ht/~rjarry/aerc/models"
+)
+
+// Decrypt runs gpg --decrypt on the contents of r. If the packet is signed,
+// the signature is also verified
+func Decrypt(r io.Reader) (*models.MessageDetails, error) {
+	md := new(models.MessageDetails)
+	orig, err := ioutil.ReadAll(r)
+	if err != nil {
+		return md, err
+	}
+	args := []string{"--decrypt"}
+	g := newGpg(bytes.NewReader(orig), args)
+	err = g.cmd.Run()
+	if err != nil {
+		err = parseError(g.stderr.String())
+		switch GPGErrors[err.Error()] {
+		case ERROR_NO_PGP_DATA_FOUND:
+			md.Body = bytes.NewReader(orig)
+			return md, nil
+		default:
+		}
+	}
+	outRdr := bytes.NewReader(g.stdout.Bytes())
+	parse(outRdr, md)
+	return md, nil
+}