Add decryptMime and refactor package structure

internal/armor.go

@@ -0,0 +1,16 @@
+package internal
+
+import (
+	"golang.org/x/crypto/openpgp/armor"
+	"strings"
+)
+
+func UnArmor(input string) (*armor.Block, error) {
+	io := strings.NewReader(input)
+	b, err := armor.Decode(io)
+	if err != nil {
+		return nil, err
+	}
+	return b, nil
+
+}

internal/common.go

@@ -0,0 +1,25 @@
+package internal
+
+import (
+	"regexp"
+	"proton/pmcrypto/constants"
+)
+
+
+func TrimNewlines(input string) string {
+	var re = regexp.MustCompile(`(?m)[ \t]*$`)
+	return re.ReplaceAllString(input, "")
+}
+
+// Amount of seconds that a signature may be created after the verify time
+// Consistent with the 2 day slack allowed in the ProtonMail Email Parser
+const CreationTimeOffset = int64(60 * 60 * 24 * 2)
+
+const (
+	ARMOR_HEADER_VERSION = "Pmcrypto Golang 0.0.1 (" + constants.VERSION + ")"
+	ARMOR_HEADER_COMMENT = "https://protonmail.com"
+)
+var ArmorHeaders = map[string]string {
+	"Version": ARMOR_HEADER_VERSION,
+	"Comment": ARMOR_HEADER_COMMENT,
+}