add encryptStringToArmor function

server/encrypt.go

@@ -0,0 +1,34 @@
+package server
+
+import (
+	"bytes"
+	"github.com/fluidkeys/crypto/openpgp"
+	"github.com/fluidkeys/crypto/openpgp/armor"
+
+	"github.com/fluidkeys/fluidkeys/pgpkey"
+)
+
+func encryptStringToArmor(secret string, pgpKey *pgpkey.PgpKey) (string, error) {
+	buffer := bytes.NewBuffer(nil)
+	message, err := armor.Encode(buffer, "PGP MESSAGE", nil)
+	if err != nil {
+		return "", err
+	}
+	pgpWriteCloser, err := openpgp.Encrypt(
+		message,
+		[]*openpgp.Entity{&pgpKey.Entity},
+		nil,
+		nil,
+		nil,
+	)
+	if err != nil {
+		return "", err
+	}
+	_, err = pgpWriteCloser.Write([]byte(secret))
+	if err != nil {
+		return "", err
+	}
+	pgpWriteCloser.Close()
+	message.Close()
+	return buffer.String(), nil
+}