Add ascii armor support

armor.go

@@ -0,0 +1,39 @@
+package crypto
+
+import (
+	"bytes"
+	"io/ioutil"
+
+	. "github.com/tendermint/go-common"
+	"golang.org/x/crypto/openpgp/armor"
+)
+
+func EncodeArmor(blockType string, headers map[string]string, data []byte) string {
+	buf := new(bytes.Buffer)
+	w, err := armor.Encode(buf, blockType, headers)
+	if err != nil {
+		PanicSanity("Error encoding ascii armor: " + err.Error())
+	}
+	_, err = w.Write(data)
+	if err != nil {
+		PanicSanity("Error encoding ascii armor: " + err.Error())
+	}
+	err = w.Close()
+	if err != nil {
+		PanicSanity("Error encoding ascii armor: " + err.Error())
+	}
+	return string(buf.Bytes())
+}
+
+func DecodeArmor(armorStr string) (blockType string, headers map[string]string, data []byte, err error) {
+	buf := bytes.NewBufferString(armorStr)
+	block, err := armor.Decode(buf)
+	if err != nil {
+		return "", nil, nil, err
+	}
+	data, err = ioutil.ReadAll(block.Body)
+	if err != nil {
+		return "", nil, nil, err
+	}
+	return block.Type, block.Header, data, nil
+}