Add ascii armor support

armor_test.go

@@ -0,0 +1,25 @@
+package crypto
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestSimpleArmor(t *testing.T) {
+	blockType := "MINT TEST"
+	data := []byte("somedata")
+	armorStr := EncodeArmor(blockType, nil, data)
+	t.Log("Got armor: ", armorStr)
+
+	// Decode armorStr and test for equivalence.
+	blockType2, _, data2, err := DecodeArmor(armorStr)
+	if err != nil {
+		t.Error(err)
+	}
+	if blockType != blockType2 {
+		t.Errorf("Expected block type %v but got %v", blockType, blockType2)
+	}
+	if !bytes.Equal(data, data2) {
+		t.Errorf("Expected data %X but got %X", data2, data)
+	}
+}