init: pristine aerc 0.20.0 source

lib/crypto/gpg/gpgbin/decrypt.go

@@ -0,0 +1,35 @@
+package gpgbin
+
+import (
+	"bytes"
+	"errors"
+	"io"
+
+	"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 := io.ReadAll(r)
+	if err != nil {
+		return md, err
+	}
+	args := []string{"--decrypt"}
+	g := newGpg(bytes.NewReader(orig), args)
+	_ = g.cmd.Run()
+	// Always parse stdout, even if there was an error running command.
+	// We'll find the error in the parsing
+	err = parseStatusFd(bytes.NewReader(g.stderr.Bytes()), md)
+
+	if errors.Is(err, NoValidOpenPgpData) {
+		md.Body = bytes.NewReader(orig)
+		return md, nil
+	} else if err != nil {
+		return nil, err
+	}
+
+	md.Body = bytes.NewReader(g.stdout.Bytes())
+	return md, nil
+}