Delete asn1.go

asn1.go

@@ -1,78 +0,0 @@
-// Copyright (C) 2016 Opsmate, Inc.
-//
-// This Source Code Form is subject to the terms of the Mozilla
-// Public License, v. 2.0. If a copy of the MPL was not distributed
-// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
-//
-// This software is distributed WITHOUT A WARRANTY OF ANY KIND.
-// See the Mozilla Public License for details.
-
-package certspotter
-
-import (
-	"bytes"
-	"encoding/asn1"
-	"encoding/binary"
-	"errors"
-	"unicode/utf8"
-)
-
-func stringFromByteSlice(chars []byte) string {
-	runes := make([]rune, len(chars))
-	for i, ch := range chars {
-		runes[i] = rune(ch)
-	}
-	return string(runes)
-}
-
-func stringFromUint16Slice(chars []uint16) string {
-	runes := make([]rune, len(chars))
-	for i, ch := range chars {
-		runes[i] = rune(ch)
-	}
-	return string(runes)
-}
-
-func stringFromUint32Slice(chars []uint32) string {
-	runes := make([]rune, len(chars))
-	for i, ch := range chars {
-		runes[i] = rune(ch)
-	}
-	return string(runes)
-}
-
-func decodeASN1String(value *asn1.RawValue) (string, error) {
-	if !value.IsCompound && value.Class == 0 {
-		if value.Tag == 12 {
-			// UTF8String
-			if !utf8.Valid(value.Bytes) {
-				return "", errors.New("Malformed UTF8String")
-			}
-			return string(value.Bytes), nil
-		} else if value.Tag == 19 || value.Tag == 22 || value.Tag == 20 || value.Tag == 26 {
-			// * PrintableString - subset of ASCII
-			// * IA5String - ASCII
-			// * TeletexString - 8 bit charset; not quite ISO-8859-1, but often treated as such
-			// * VisibleString - subset of ASCII
-
-			// Don't enforce character set rules. Allow any 8 bit character, since
-			// CAs routinely mess this up
-			return stringFromByteSlice(value.Bytes), nil
-		} else if value.Tag == 30 {
-			// BMPString - Unicode, encoded in big-endian format using two octets
-			runes := make([]uint16, len(value.Bytes)/2)
-			if err := binary.Read(bytes.NewReader(value.Bytes), binary.BigEndian, runes); err != nil {
-				return "", errors.New("Malformed BMPString: " + err.Error())
-			}
-			return stringFromUint16Slice(runes), nil
-		} else if value.Tag == 28 {
-			// UniversalString - Unicode, encoded in big-endian format using four octets
-			runes := make([]uint32, len(value.Bytes)/4)
-			if err := binary.Read(bytes.NewReader(value.Bytes), binary.BigEndian, runes); err != nil {
-				return "", errors.New("Malformed UniversalString: " + err.Error())
-			}
-			return stringFromUint32Slice(runes), nil
-		}
-	}
-	return "", errors.New("Not a string")
-}