static byte[] ConvertToP1363Signature(byte[] ASN1Sig)
        {
            AsnParser asn = new AsnParser(ASN1Sig);
            asn.NextSequence();
            byte[] r = asn.NextInteger();
            byte[] s = asn.NextInteger();

            // Returned to caller
            byte[] p1363Signature = new byte[40];

            if (r.Length > 21 || (r.Length == 21 && r[0] != 0))
            {
                // WTF???
                // Reject - signature verification failed
            }
            else if (r.Length == 21)
            {
                // r[0] = 0
                // r[1]'s high bit *should* be set
                Array.Copy(r, 1, p1363Signature, 0, 20);
            }
            else if (r.Length == 20)
            {
                // r[0]'s high bit *should not* be set
                Array.Copy(r, 0, p1363Signature, 0, 20);
            }
            else
            {
                // fewer than 20 bytes
                int len = r.Length;
                int off = 20 - len;
                Array.Copy(r, 0, p1363Signature, off, len);
            }

            if (s.Length > 21 || (s.Length == 21 && s[0] != 0))
            {
                // WTF???
                // Reject - signature verification failed
            }
            else if (s.Length == 21)
            {
                // s[0] = 0
                // s[1]'s high bit *should* be set
                Array.Copy(s, 1, p1363Signature, 20, 20);
            }
            else if (s.Length == 20)
            {
                // s[0]'s high bit *should not* be set
                Array.Copy(s, 0, p1363Signature, 20, 20);
            }
            else
            {
                // fewer than 20 bytes
                int len = s.Length;
                int off = 40 - len;
                Array.Copy(s, 0, p1363Signature, off, len);
            }

            return p1363Signature;
        }
Ejemplo n.º 2
0
        internal AsnKeyParser(String pathname)
        {
            using (BinaryReader reader = new BinaryReader(
              new FileStream(pathname, FileMode.Open, FileAccess.Read)))
              {
            FileInfo info = new FileInfo(pathname);

            parser = new AsnParser(reader.ReadBytes((int)info.Length));
              }
        }
Ejemplo n.º 3
0
 internal AsnKeyParser(byte[] content)
 {
     parser = new AsnParser(content);
 }