jellyfin-server/Emby.Server.Core/Cryptography/X501Name.cs
2017-05-24 15:12:55 -04:00

394 lines
11 KiB
C#

//
// X501Name.cs: X.501 Distinguished Names stuff
//
// Author:
// Sebastien Pouliot <sebastien@ximian.com>
//
// (C) 2002, 2003 Motus Technologies Inc. (http://www.motus.com)
// Copyright (C) 2004-2006 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Globalization;
using System.Text;
namespace Emby.Server.Core.Cryptography
{
// References:
// 1. Information technology - Open Systems Interconnection - The Directory: Models
// http://www.itu.int/rec/recommendation.asp?type=items&lang=e&parent=T-REC-X.501-200102-I
// 2. RFC2253: Lightweight Directory Access Protocol (v3): UTF-8 String Representation of Distinguished Names
// http://www.ietf.org/rfc/rfc2253.txt
/*
* Name ::= CHOICE { RDNSequence }
*
* RDNSequence ::= SEQUENCE OF RelativeDistinguishedName
*
* RelativeDistinguishedName ::= SET OF AttributeTypeAndValue
*/
public sealed class X501 {
static byte[] countryName = { 0x55, 0x04, 0x06 };
static byte[] organizationName = { 0x55, 0x04, 0x0A };
static byte[] organizationalUnitName = { 0x55, 0x04, 0x0B };
static byte[] commonName = { 0x55, 0x04, 0x03 };
static byte[] localityName = { 0x55, 0x04, 0x07 };
static byte[] stateOrProvinceName = { 0x55, 0x04, 0x08 };
static byte[] streetAddress = { 0x55, 0x04, 0x09 };
//static byte[] serialNumber = { 0x55, 0x04, 0x05 };
static byte[] domainComponent = { 0x09, 0x92, 0x26, 0x89, 0x93, 0xF2, 0x2C, 0x64, 0x01, 0x19 };
static byte[] userid = { 0x09, 0x92, 0x26, 0x89, 0x93, 0xF2, 0x2C, 0x64, 0x01, 0x01 };
static byte[] email = { 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x09, 0x01 };
static byte[] dnQualifier = { 0x55, 0x04, 0x2E };
static byte[] title = { 0x55, 0x04, 0x0C };
static byte[] surname = { 0x55, 0x04, 0x04 };
static byte[] givenName = { 0x55, 0x04, 0x2A };
static byte[] initial = { 0x55, 0x04, 0x2B };
private X501 ()
{
}
static public string ToString (ASN1 seq)
{
StringBuilder sb = new StringBuilder ();
for (int i = 0; i < seq.Count; i++) {
ASN1 entry = seq [i];
AppendEntry (sb, entry, true);
// separator (not on last iteration)
if (i < seq.Count - 1)
sb.Append (", ");
}
return sb.ToString ();
}
static public string ToString (ASN1 seq, bool reversed, string separator, bool quotes)
{
StringBuilder sb = new StringBuilder ();
if (reversed) {
for (int i = seq.Count - 1; i >= 0; i--) {
ASN1 entry = seq [i];
AppendEntry (sb, entry, quotes);
// separator (not on last iteration)
if (i > 0)
sb.Append (separator);
}
} else {
for (int i = 0; i < seq.Count; i++) {
ASN1 entry = seq [i];
AppendEntry (sb, entry, quotes);
// separator (not on last iteration)
if (i < seq.Count - 1)
sb.Append (separator);
}
}
return sb.ToString ();
}
static private void AppendEntry (StringBuilder sb, ASN1 entry, bool quotes)
{
// multiple entries are valid
for (int k = 0; k < entry.Count; k++) {
ASN1 pair = entry [k];
ASN1 s = pair [1];
if (s == null)
continue;
ASN1 poid = pair [0];
if (poid == null)
continue;
if (poid.CompareValue (countryName))
sb.Append ("C=");
else if (poid.CompareValue (organizationName))
sb.Append ("O=");
else if (poid.CompareValue (organizationalUnitName))
sb.Append ("OU=");
else if (poid.CompareValue (commonName))
sb.Append ("CN=");
else if (poid.CompareValue (localityName))
sb.Append ("L=");
else if (poid.CompareValue (stateOrProvinceName))
sb.Append ("S="); // NOTE: RFC2253 uses ST=
else if (poid.CompareValue (streetAddress))
sb.Append ("STREET=");
else if (poid.CompareValue (domainComponent))
sb.Append ("DC=");
else if (poid.CompareValue (userid))
sb.Append ("UID=");
else if (poid.CompareValue (email))
sb.Append ("E="); // NOTE: Not part of RFC2253
else if (poid.CompareValue (dnQualifier))
sb.Append ("dnQualifier=");
else if (poid.CompareValue (title))
sb.Append ("T=");
else if (poid.CompareValue (surname))
sb.Append ("SN=");
else if (poid.CompareValue (givenName))
sb.Append ("G=");
else if (poid.CompareValue (initial))
sb.Append ("I=");
else {
// unknown OID
sb.Append ("OID."); // NOTE: Not present as RFC2253
sb.Append (ASN1Convert.ToOid (poid));
sb.Append ("=");
}
string sValue = null;
// 16bits or 8bits string ? TODO not complete (+special chars!)
if (s.Tag == 0x1E) {
// BMPSTRING
StringBuilder sb2 = new StringBuilder ();
for (int j = 1; j < s.Value.Length; j += 2)
sb2.Append ((char)s.Value[j]);
sValue = sb2.ToString ();
} else {
if (s.Tag == 0x14)
sValue = Encoding.UTF7.GetString (s.Value);
else
sValue = Encoding.UTF8.GetString (s.Value);
// in some cases we must quote (") the value
// Note: this doesn't seems to conform to RFC2253
char[] specials = { ',', '+', '"', '\\', '<', '>', ';' };
if (quotes) {
if ((sValue.IndexOfAny (specials, 0, sValue.Length) > 0) ||
sValue.StartsWith (" ") || (sValue.EndsWith (" ")))
sValue = "\"" + sValue + "\"";
}
}
sb.Append (sValue);
// separator (not on last iteration)
if (k < entry.Count - 1)
sb.Append (", ");
}
}
static private X520.AttributeTypeAndValue GetAttributeFromOid (string attributeType)
{
string s = attributeType.ToUpper (CultureInfo.InvariantCulture).Trim ();
switch (s) {
case "C":
return new X520.CountryName ();
case "O":
return new X520.OrganizationName ();
case "OU":
return new X520.OrganizationalUnitName ();
case "CN":
return new X520.CommonName ();
case "L":
return new X520.LocalityName ();
case "S": // Microsoft
case "ST": // RFC2253
return new X520.StateOrProvinceName ();
case "E": // NOTE: Not part of RFC2253
return new X520.EmailAddress ();
case "DC": // RFC2247
return new X520.DomainComponent ();
case "UID": // RFC1274
return new X520.UserId ();
case "DNQUALIFIER":
return new X520.DnQualifier ();
case "T":
return new X520.Title ();
case "SN":
return new X520.Surname ();
case "G":
return new X520.GivenName ();
case "I":
return new X520.Initial ();
default:
if (s.StartsWith ("OID.")) {
// MUST support it but it OID may be without it
return new X520.Oid (s.Substring (4));
} else {
if (IsOid (s))
return new X520.Oid (s);
else
return null;
}
}
}
static private bool IsOid (string oid)
{
try {
ASN1 asn = ASN1Convert.FromOid (oid);
return (asn.Tag == 0x06);
}
catch {
return false;
}
}
// no quote processing
static private X520.AttributeTypeAndValue ReadAttribute (string value, ref int pos)
{
while ((value[pos] == ' ') && (pos < value.Length))
pos++;
// get '=' position in substring
int equal = value.IndexOf ('=', pos);
if (equal == -1) {
string msg = ("No attribute found.");
throw new FormatException (msg);
}
string s = value.Substring (pos, equal - pos);
X520.AttributeTypeAndValue atv = GetAttributeFromOid (s);
if (atv == null) {
string msg = ("Unknown attribute '{0}'.");
throw new FormatException (String.Format (msg, s));
}
pos = equal + 1; // skip the '='
return atv;
}
static private bool IsHex (char c)
{
if (Char.IsDigit (c))
return true;
char up = Char.ToUpper (c, CultureInfo.InvariantCulture);
return ((up >= 'A') && (up <= 'F'));
}
static string ReadHex (string value, ref int pos)
{
StringBuilder sb = new StringBuilder ();
// it is (at least an) 8 bits char
sb.Append (value[pos++]);
sb.Append (value[pos]);
// look ahead for a 16 bits char
if ((pos < value.Length - 4) && (value[pos+1] == '\\') && IsHex (value[pos+2])) {
pos += 2; // pass last char and skip \
sb.Append (value[pos++]);
sb.Append (value[pos]);
}
byte[] data = CryptoConvert.FromHex (sb.ToString ());
return Encoding.UTF8.GetString (data);
}
static private int ReadEscaped (StringBuilder sb, string value, int pos)
{
switch (value[pos]) {
case '\\':
case '"':
case '=':
case ';':
case '<':
case '>':
case '+':
case '#':
case ',':
sb.Append (value[pos]);
return pos;
default:
if (pos >= value.Length - 2) {
string msg = ("Malformed escaped value '{0}'.");
throw new FormatException (string.Format (msg, value.Substring (pos)));
}
// it's either a 8 bits or 16 bits char
sb.Append (ReadHex (value, ref pos));
return pos;
}
}
static private int ReadQuoted (StringBuilder sb, string value, int pos)
{
int original = pos;
while (pos <= value.Length) {
switch (value[pos]) {
case '"':
return pos;
case '\\':
return ReadEscaped (sb, value, pos);
default:
sb.Append (value[pos]);
pos++;
break;
}
}
string msg = ("Malformed quoted value '{0}'.");
throw new FormatException (string.Format (msg, value.Substring (original)));
}
static private string ReadValue (string value, ref int pos)
{
int original = pos;
StringBuilder sb = new StringBuilder ();
while (pos < value.Length) {
switch (value [pos]) {
case '\\':
pos = ReadEscaped (sb, value, ++pos);
break;
case '"':
pos = ReadQuoted (sb, value, ++pos);
break;
case '=':
case ';':
case '<':
case '>':
string msg =("Malformed value '{0}' contains '{1}' outside quotes.");
throw new FormatException (string.Format (msg, value.Substring (original), value[pos]));
case '+':
case '#':
throw new NotImplementedException ();
case ',':
pos++;
return sb.ToString ();
default:
sb.Append (value[pos]);
break;
}
pos++;
}
return sb.ToString ();
}
static public ASN1 FromString (string rdn)
{
if (rdn == null)
throw new ArgumentNullException ("rdn");
int pos = 0;
ASN1 asn1 = new ASN1 (0x30);
while (pos < rdn.Length) {
X520.AttributeTypeAndValue atv = ReadAttribute (rdn, ref pos);
atv.Value = ReadValue (rdn, ref pos);
ASN1 sequence = new ASN1 (0x31);
sequence.Add (atv.GetASN1 ());
asn1.Add (sequence);
}
return asn1;
}
}
}