// Jesper Pedersen <jep@itplus.dk>
//
// (C) 2003 Motus Technologies Inc. (http://www.motus.com)
-// (C) 2004 Novell (http://www.novell.com)
// (C) 2004 IT+ A/S (http://www.itplus.dk)
+// Copyright (C) 2004-2007 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;
#else
public
#endif
- sealed class ASN1Convert {
-
- private ASN1Convert ()
- {
- }
-
+ static class ASN1Convert {
// RFC3280, section 4.2.1.5
// CAs conforming to this profile MUST always encode certificate
// validity dates through the year 2049 as UTCTime; certificate validity
// dates in 2050 or later MUST be encoded as GeneralizedTime.
+
+ // Under 1.x this API requires a Local datetime to be provided
+ // Under 2.0 it will also accept a Utc datetime
static public ASN1 FromDateTime (DateTime dt)
{
if (dt.Year < 2050) {
// UTCTIME
return new ASN1 (0x17, Encoding.ASCII.GetBytes (
- dt.ToString ("yyMMddHHmmss", CultureInfo.InvariantCulture) + "Z"));
+ dt.ToUniversalTime ().ToString ("yyMMddHHmmss",
+ CultureInfo.InvariantCulture) + "Z"));
}
else {
// GENERALIZEDTIME
return new ASN1 (0x18, Encoding.ASCII.GetBytes (
- dt.ToString ("yyyyMMddHHmmss", CultureInfo.InvariantCulture) + "Z"));
+ dt.ToUniversalTime ().ToString ("yyyyMMddHHmmss",
+ CultureInfo.InvariantCulture) + "Z"));
}
}
static public ASN1 FromInt32 (Int32 value)
{
byte[] integer = BitConverterLE.GetBytes (value);
- int x = 3;
- while (integer [x] == 0x00)
- x--;
+ Array.Reverse (integer);
+ int x = 0;
+ while ((x < integer.Length) && (integer [x] == 0x00))
+ x++;
ASN1 asn1 = new ASN1 (0x02);
-
- byte[] smallerInt = new byte [x + 1];
- int index = smallerInt.Length - 1;
- for (int i = 0; i < smallerInt.Length; i++) {
- smallerInt [index] = integer [i];
- index--;
+ switch (x) {
+ case 0:
+ asn1.Value = integer;
+ break;
+ case 4:
+ asn1.Value = new byte [1];
+ break;
+ default:
+ byte[] smallerInt = new byte [4 - x];
+ Buffer.BlockCopy (integer, x, smallerInt, 0, smallerInt.Length);
+ asn1.Value = smallerInt;
+ break;
}
- asn1.Value = smallerInt;
-
return asn1;
}
static public ASN1 FromOid (string oid)
{
+ if (oid == null)
+ throw new ArgumentNullException ("oid");
+
return new ASN1 (CryptoConfig.EncodeOID (oid));
}
static public ASN1 FromUnsignedBigInteger (byte[] big)
{
- if (big [0] == 0x00) {
- // this first byte is added so we're sure it's an unsigned integer
- // however we can't feed it into RSAParameters or DSAParameters
+ if (big == null)
+ throw new ArgumentNullException ("big");
+
+ // check for numbers that could be interpreted as negative (first bit)
+ if (big [0] >= 0x80) {
+ // in thie cas we add a new, empty, byte (position 0) so we're
+ // sure this will always be interpreted an unsigned integer.
+ // However we can't feed it into RSAParameters or DSAParameters
int length = big.Length + 1;
byte[] uinteger = new byte [length];
- Buffer.BlockCopy (big, 0, uinteger, 1, length);
+ Buffer.BlockCopy (big, 0, uinteger, 1, length - 1);
big = uinteger;
}
return new ASN1 (0x02, big);
static public int ToInt32 (ASN1 asn1)
{
+ if (asn1 == null)
+ throw new ArgumentNullException ("asn1");
if (asn1.Tag != 0x02)
- throw new NotSupportedException ("Only integer can be converted");
+ throw new FormatException ("Only integer can be converted");
+
int x = 0;
for (int i=0; i < asn1.Value.Length; i++)
x = (x << 8) + asn1.Value [i];
// an OID (IETF style). Based on DUMPASN1.C from Peter Gutmann.
static public string ToOid (ASN1 asn1)
{
+ if (asn1 == null)
+ throw new ArgumentNullException ("asn1");
+
byte[] aOID = asn1.Value;
StringBuilder sb = new StringBuilder ();
// Pick apart the OID
static public DateTime ToDateTime (ASN1 time)
{
+ if (time == null)
+ throw new ArgumentNullException ("time");
+
string t = Encoding.ASCII.GetString (time.Value);
// to support both UTCTime and GeneralizedTime (and not so common format)
string mask = null;
+ int year;
switch (t.Length) {
case 11:
- mask = "yyMMddHHmmZ"; // illegal I think ... must check
+ // illegal format, still it's supported for compatibility
+ mask = "yyMMddHHmmZ";
break;
case 13:
// RFC3280: 4.1.2.5.1 UTCTime
- int year = Convert.ToInt16 (t.Substring (0, 2), CultureInfo.InvariantCulture);
+ year = Convert.ToInt16 (t.Substring (0, 2), CultureInfo.InvariantCulture);
// Where YY is greater than or equal to 50, the
// year SHALL be interpreted as 19YY; and
// Where YY is less than 50, the year SHALL be
case 15:
mask = "yyyyMMddHHmmssZ"; // GeneralizedTime
break;
+ case 17:
+ // another illegal format (990630000000+1000), again supported for compatibility
+ year = Convert.ToInt16 (t.Substring (0, 2), CultureInfo.InvariantCulture);
+ string century = (year >= 50) ? "19" : "20";
+ // ASN.1 (see ITU X.680 section 43.3) deals with offset differently than .NET
+ char sign = (t[12] == '+') ? '-' : '+';
+ t = String.Format ("{0}{1}{2}{3}{4}:{5}{6}", century, t.Substring (0, 12), sign,
+ t[13], t[14], t[15], t[16]);
+ mask = "yyyyMMddHHmmsszzz";
+ break;
}
- return DateTime.ParseExact (t, mask, null);
+ return DateTime.ParseExact (t, mask, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal);
}
}
}
projects / mono.git / blobdiff