746 lines
21 KiB
C#
746 lines
21 KiB
C#
//
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// CryptoConvert.cs - Crypto Convertion Routines
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//
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// Author:
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// Sebastien Pouliot <sebastien@ximian.com>
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//
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// (C) 2003 Motus Technologies Inc. (http://www.motus.com)
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// Copyright (C) 2004-2006 Novell Inc. (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Globalization;
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using System.Security.Cryptography;
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using System.Text;
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namespace Emby.Common.Implementations.Security
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{
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public sealed class CryptoConvert {
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private CryptoConvert ()
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{
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}
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static private int ToInt32LE (byte [] bytes, int offset)
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{
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return (bytes [offset+3] << 24) | (bytes [offset+2] << 16) | (bytes [offset+1] << 8) | bytes [offset];
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}
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static private uint ToUInt32LE (byte [] bytes, int offset)
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{
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return (uint)((bytes [offset+3] << 24) | (bytes [offset+2] << 16) | (bytes [offset+1] << 8) | bytes [offset]);
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}
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static private byte [] GetBytesLE (int val)
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{
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return new byte [] {
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(byte) (val & 0xff),
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(byte) ((val >> 8) & 0xff),
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(byte) ((val >> 16) & 0xff),
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(byte) ((val >> 24) & 0xff)
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};
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}
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static private byte[] Trim (byte[] array)
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{
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for (int i=0; i < array.Length; i++) {
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if (array [i] != 0x00) {
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byte[] result = new byte [array.Length - i];
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Buffer.BlockCopy (array, i, result, 0, result.Length);
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return result;
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}
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}
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return null;
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}
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// convert the key from PRIVATEKEYBLOB to RSA
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// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/security/Security/private_key_blobs.asp
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// e.g. SNK files, PVK files
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static public RSA FromCapiPrivateKeyBlob (byte[] blob)
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{
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return FromCapiPrivateKeyBlob (blob, 0);
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}
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static public RSA FromCapiPrivateKeyBlob (byte[] blob, int offset)
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{
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if (blob == null)
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throw new ArgumentNullException ("blob");
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if (offset >= blob.Length)
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throw new ArgumentException ("blob is too small.");
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RSAParameters rsap = new RSAParameters ();
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try {
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if ((blob [offset] != 0x07) || // PRIVATEKEYBLOB (0x07)
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(blob [offset+1] != 0x02) || // Version (0x02)
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(blob [offset+2] != 0x00) || // Reserved (word)
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(blob [offset+3] != 0x00) ||
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(ToUInt32LE (blob, offset+8) != 0x32415352)) // DWORD magic = RSA2
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throw new CryptographicException ("Invalid blob header");
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// ALGID (CALG_RSA_SIGN, CALG_RSA_KEYX, ...)
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// int algId = ToInt32LE (blob, offset+4);
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// DWORD bitlen
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int bitLen = ToInt32LE (blob, offset+12);
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// DWORD public exponent
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byte[] exp = new byte [4];
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Buffer.BlockCopy (blob, offset+16, exp, 0, 4);
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Array.Reverse (exp);
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rsap.Exponent = Trim (exp);
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int pos = offset+20;
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// BYTE modulus[rsapubkey.bitlen/8];
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int byteLen = (bitLen >> 3);
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rsap.Modulus = new byte [byteLen];
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Buffer.BlockCopy (blob, pos, rsap.Modulus, 0, byteLen);
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Array.Reverse (rsap.Modulus);
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pos += byteLen;
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// BYTE prime1[rsapubkey.bitlen/16];
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int byteHalfLen = (byteLen >> 1);
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rsap.P = new byte [byteHalfLen];
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Buffer.BlockCopy (blob, pos, rsap.P, 0, byteHalfLen);
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Array.Reverse (rsap.P);
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pos += byteHalfLen;
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// BYTE prime2[rsapubkey.bitlen/16];
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rsap.Q = new byte [byteHalfLen];
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Buffer.BlockCopy (blob, pos, rsap.Q, 0, byteHalfLen);
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Array.Reverse (rsap.Q);
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pos += byteHalfLen;
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// BYTE exponent1[rsapubkey.bitlen/16];
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rsap.DP = new byte [byteHalfLen];
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Buffer.BlockCopy (blob, pos, rsap.DP, 0, byteHalfLen);
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Array.Reverse (rsap.DP);
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pos += byteHalfLen;
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// BYTE exponent2[rsapubkey.bitlen/16];
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rsap.DQ = new byte [byteHalfLen];
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Buffer.BlockCopy (blob, pos, rsap.DQ, 0, byteHalfLen);
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Array.Reverse (rsap.DQ);
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pos += byteHalfLen;
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// BYTE coefficient[rsapubkey.bitlen/16];
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rsap.InverseQ = new byte [byteHalfLen];
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Buffer.BlockCopy (blob, pos, rsap.InverseQ, 0, byteHalfLen);
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Array.Reverse (rsap.InverseQ);
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pos += byteHalfLen;
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// ok, this is hackish but CryptoAPI support it so...
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// note: only works because CRT is used by default
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// http://bugzilla.ximian.com/show_bug.cgi?id=57941
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rsap.D = new byte [byteLen]; // must be allocated
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if (pos + byteLen + offset <= blob.Length) {
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// BYTE privateExponent[rsapubkey.bitlen/8];
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Buffer.BlockCopy (blob, pos, rsap.D, 0, byteLen);
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Array.Reverse (rsap.D);
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}
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}
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catch (Exception e) {
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throw new CryptographicException ("Invalid blob.", e);
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}
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RSA rsa = null;
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try
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{
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rsa = RSA.Create();
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rsa.ImportParameters(rsap);
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}
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catch (CryptographicException ce)
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{
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// this may cause problem when this code is run under
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// the SYSTEM identity on Windows (e.g. ASP.NET). See
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// http://bugzilla.ximian.com/show_bug.cgi?id=77559
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try
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{
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CspParameters csp = new CspParameters();
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csp.Flags = CspProviderFlags.UseMachineKeyStore;
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rsa = new RSACryptoServiceProvider(csp);
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rsa.ImportParameters(rsap);
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}
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catch
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{
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// rethrow original, not the later, exception if this fails
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throw ce;
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}
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}
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return rsa;
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}
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static public DSA FromCapiPrivateKeyBlobDSA (byte[] blob)
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{
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return FromCapiPrivateKeyBlobDSA (blob, 0);
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}
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static public DSA FromCapiPrivateKeyBlobDSA (byte[] blob, int offset)
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{
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if (blob == null)
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throw new ArgumentNullException ("blob");
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if (offset >= blob.Length)
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throw new ArgumentException ("blob is too small.");
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DSAParameters dsap = new DSAParameters ();
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try {
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if ((blob [offset] != 0x07) || // PRIVATEKEYBLOB (0x07)
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(blob [offset + 1] != 0x02) || // Version (0x02)
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(blob [offset + 2] != 0x00) || // Reserved (word)
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(blob [offset + 3] != 0x00) ||
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(ToUInt32LE (blob, offset + 8) != 0x32535344)) // DWORD magic
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throw new CryptographicException ("Invalid blob header");
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int bitlen = ToInt32LE (blob, offset + 12);
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int bytelen = bitlen >> 3;
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int pos = offset + 16;
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dsap.P = new byte [bytelen];
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Buffer.BlockCopy (blob, pos, dsap.P, 0, bytelen);
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Array.Reverse (dsap.P);
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pos += bytelen;
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dsap.Q = new byte [20];
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Buffer.BlockCopy (blob, pos, dsap.Q, 0, 20);
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Array.Reverse (dsap.Q);
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pos += 20;
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dsap.G = new byte [bytelen];
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Buffer.BlockCopy (blob, pos, dsap.G, 0, bytelen);
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Array.Reverse (dsap.G);
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pos += bytelen;
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dsap.X = new byte [20];
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Buffer.BlockCopy (blob, pos, dsap.X, 0, 20);
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Array.Reverse (dsap.X);
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pos += 20;
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dsap.Counter = ToInt32LE (blob, pos);
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pos += 4;
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dsap.Seed = new byte [20];
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Buffer.BlockCopy (blob, pos, dsap.Seed, 0, 20);
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Array.Reverse (dsap.Seed);
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pos += 20;
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}
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catch (Exception e) {
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throw new CryptographicException ("Invalid blob.", e);
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}
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DSA dsa = null;
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try
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{
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dsa = (DSA)DSA.Create();
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dsa.ImportParameters(dsap);
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}
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catch (CryptographicException ce)
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{
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// this may cause problem when this code is run under
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// the SYSTEM identity on Windows (e.g. ASP.NET). See
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// http://bugzilla.ximian.com/show_bug.cgi?id=77559
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try
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{
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CspParameters csp = new CspParameters();
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csp.Flags = CspProviderFlags.UseMachineKeyStore;
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dsa = new DSACryptoServiceProvider(csp);
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dsa.ImportParameters(dsap);
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}
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catch
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{
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// rethrow original, not the later, exception if this fails
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throw ce;
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}
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}
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return dsa;
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}
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static public byte[] ToCapiPrivateKeyBlob (RSA rsa)
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{
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RSAParameters p = rsa.ExportParameters (true);
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int keyLength = p.Modulus.Length; // in bytes
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byte[] blob = new byte [20 + (keyLength << 2) + (keyLength >> 1)];
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blob [0] = 0x07; // Type - PRIVATEKEYBLOB (0x07)
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blob [1] = 0x02; // Version - Always CUR_BLOB_VERSION (0x02)
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// [2], [3] // RESERVED - Always 0
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blob [5] = 0x24; // ALGID - Always 00 24 00 00 (for CALG_RSA_SIGN)
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blob [8] = 0x52; // Magic - RSA2 (ASCII in hex)
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blob [9] = 0x53;
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blob [10] = 0x41;
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blob [11] = 0x32;
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byte[] bitlen = GetBytesLE (keyLength << 3);
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blob [12] = bitlen [0]; // bitlen
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blob [13] = bitlen [1];
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blob [14] = bitlen [2];
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blob [15] = bitlen [3];
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// public exponent (DWORD)
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int pos = 16;
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int n = p.Exponent.Length;
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while (n > 0)
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blob [pos++] = p.Exponent [--n];
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// modulus
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pos = 20;
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byte[] part = p.Modulus;
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int len = part.Length;
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Array.Reverse (part, 0, len);
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Buffer.BlockCopy (part, 0, blob, pos, len);
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pos += len;
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// private key
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part = p.P;
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len = part.Length;
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Array.Reverse (part, 0, len);
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Buffer.BlockCopy (part, 0, blob, pos, len);
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pos += len;
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part = p.Q;
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len = part.Length;
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Array.Reverse (part, 0, len);
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Buffer.BlockCopy (part, 0, blob, pos, len);
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pos += len;
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part = p.DP;
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len = part.Length;
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Array.Reverse (part, 0, len);
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Buffer.BlockCopy (part, 0, blob, pos, len);
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pos += len;
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part = p.DQ;
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len = part.Length;
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Array.Reverse (part, 0, len);
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Buffer.BlockCopy (part, 0, blob, pos, len);
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pos += len;
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part = p.InverseQ;
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len = part.Length;
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Array.Reverse (part, 0, len);
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Buffer.BlockCopy (part, 0, blob, pos, len);
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pos += len;
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part = p.D;
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len = part.Length;
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Array.Reverse (part, 0, len);
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Buffer.BlockCopy (part, 0, blob, pos, len);
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return blob;
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}
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static public byte[] ToCapiPrivateKeyBlob (DSA dsa)
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{
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DSAParameters p = dsa.ExportParameters (true);
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int keyLength = p.P.Length; // in bytes
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// header + P + Q + G + X + count + seed
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byte[] blob = new byte [16 + keyLength + 20 + keyLength + 20 + 4 + 20];
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blob [0] = 0x07; // Type - PRIVATEKEYBLOB (0x07)
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blob [1] = 0x02; // Version - Always CUR_BLOB_VERSION (0x02)
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// [2], [3] // RESERVED - Always 0
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blob [5] = 0x22; // ALGID
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blob [8] = 0x44; // Magic
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blob [9] = 0x53;
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blob [10] = 0x53;
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blob [11] = 0x32;
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byte[] bitlen = GetBytesLE (keyLength << 3);
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blob [12] = bitlen [0];
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blob [13] = bitlen [1];
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blob [14] = bitlen [2];
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blob [15] = bitlen [3];
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int pos = 16;
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byte[] part = p.P;
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Array.Reverse (part);
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Buffer.BlockCopy (part, 0, blob, pos, keyLength);
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pos += keyLength;
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part = p.Q;
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Array.Reverse (part);
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Buffer.BlockCopy (part, 0, blob, pos, 20);
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pos += 20;
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part = p.G;
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Array.Reverse (part);
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Buffer.BlockCopy (part, 0, blob, pos, keyLength);
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pos += keyLength;
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part = p.X;
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Array.Reverse (part);
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Buffer.BlockCopy (part, 0, blob, pos, 20);
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pos += 20;
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Buffer.BlockCopy (GetBytesLE (p.Counter), 0, blob, pos, 4);
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pos += 4;
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part = p.Seed;
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Array.Reverse (part);
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Buffer.BlockCopy (part, 0, blob, pos, 20);
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return blob;
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}
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static public RSA FromCapiPublicKeyBlob (byte[] blob)
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{
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return FromCapiPublicKeyBlob (blob, 0);
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}
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static public RSA FromCapiPublicKeyBlob (byte[] blob, int offset)
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{
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if (blob == null)
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throw new ArgumentNullException ("blob");
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if (offset >= blob.Length)
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throw new ArgumentException ("blob is too small.");
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try {
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if ((blob [offset] != 0x06) || // PUBLICKEYBLOB (0x06)
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(blob [offset+1] != 0x02) || // Version (0x02)
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(blob [offset+2] != 0x00) || // Reserved (word)
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(blob [offset+3] != 0x00) ||
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(ToUInt32LE (blob, offset+8) != 0x31415352)) // DWORD magic = RSA1
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throw new CryptographicException ("Invalid blob header");
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// ALGID (CALG_RSA_SIGN, CALG_RSA_KEYX, ...)
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// int algId = ToInt32LE (blob, offset+4);
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// DWORD bitlen
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int bitLen = ToInt32LE (blob, offset+12);
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// DWORD public exponent
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RSAParameters rsap = new RSAParameters ();
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rsap.Exponent = new byte [3];
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rsap.Exponent [0] = blob [offset+18];
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rsap.Exponent [1] = blob [offset+17];
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rsap.Exponent [2] = blob [offset+16];
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int pos = offset+20;
|
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// BYTE modulus[rsapubkey.bitlen/8];
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int byteLen = (bitLen >> 3);
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rsap.Modulus = new byte [byteLen];
|
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Buffer.BlockCopy (blob, pos, rsap.Modulus, 0, byteLen);
|
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Array.Reverse (rsap.Modulus);
|
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RSA rsa = null;
|
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try
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{
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rsa = RSA.Create();
|
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rsa.ImportParameters(rsap);
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}
|
|
catch (CryptographicException)
|
|
{
|
|
// this may cause problem when this code is run under
|
|
// the SYSTEM identity on Windows (e.g. ASP.NET). See
|
|
// http://bugzilla.ximian.com/show_bug.cgi?id=77559
|
|
CspParameters csp = new CspParameters();
|
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csp.Flags = CspProviderFlags.UseMachineKeyStore;
|
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rsa = new RSACryptoServiceProvider(csp);
|
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rsa.ImportParameters(rsap);
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}
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return rsa;
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}
|
|
catch (Exception e) {
|
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throw new CryptographicException ("Invalid blob.", e);
|
|
}
|
|
}
|
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|
|
static public DSA FromCapiPublicKeyBlobDSA (byte[] blob)
|
|
{
|
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return FromCapiPublicKeyBlobDSA (blob, 0);
|
|
}
|
|
|
|
static public DSA FromCapiPublicKeyBlobDSA (byte[] blob, int offset)
|
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{
|
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if (blob == null)
|
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throw new ArgumentNullException ("blob");
|
|
if (offset >= blob.Length)
|
|
throw new ArgumentException ("blob is too small.");
|
|
|
|
try {
|
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if ((blob [offset] != 0x06) || // PUBLICKEYBLOB (0x06)
|
|
(blob [offset + 1] != 0x02) || // Version (0x02)
|
|
(blob [offset + 2] != 0x00) || // Reserved (word)
|
|
(blob [offset + 3] != 0x00) ||
|
|
(ToUInt32LE (blob, offset + 8) != 0x31535344)) // DWORD magic
|
|
throw new CryptographicException ("Invalid blob header");
|
|
|
|
int bitlen = ToInt32LE (blob, offset + 12);
|
|
DSAParameters dsap = new DSAParameters ();
|
|
int bytelen = bitlen >> 3;
|
|
int pos = offset + 16;
|
|
|
|
dsap.P = new byte [bytelen];
|
|
Buffer.BlockCopy (blob, pos, dsap.P, 0, bytelen);
|
|
Array.Reverse (dsap.P);
|
|
pos += bytelen;
|
|
|
|
dsap.Q = new byte [20];
|
|
Buffer.BlockCopy (blob, pos, dsap.Q, 0, 20);
|
|
Array.Reverse (dsap.Q);
|
|
pos += 20;
|
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|
|
dsap.G = new byte [bytelen];
|
|
Buffer.BlockCopy (blob, pos, dsap.G, 0, bytelen);
|
|
Array.Reverse (dsap.G);
|
|
pos += bytelen;
|
|
|
|
dsap.Y = new byte [bytelen];
|
|
Buffer.BlockCopy (blob, pos, dsap.Y, 0, bytelen);
|
|
Array.Reverse (dsap.Y);
|
|
pos += bytelen;
|
|
|
|
dsap.Counter = ToInt32LE (blob, pos);
|
|
pos += 4;
|
|
|
|
dsap.Seed = new byte [20];
|
|
Buffer.BlockCopy (blob, pos, dsap.Seed, 0, 20);
|
|
Array.Reverse (dsap.Seed);
|
|
pos += 20;
|
|
|
|
DSA dsa = (DSA)DSA.Create ();
|
|
dsa.ImportParameters (dsap);
|
|
return dsa;
|
|
}
|
|
catch (Exception e) {
|
|
throw new CryptographicException ("Invalid blob.", e);
|
|
}
|
|
}
|
|
|
|
static public byte[] ToCapiPublicKeyBlob (RSA rsa)
|
|
{
|
|
RSAParameters p = rsa.ExportParameters (false);
|
|
int keyLength = p.Modulus.Length; // in bytes
|
|
byte[] blob = new byte [20 + keyLength];
|
|
|
|
blob [0] = 0x06; // Type - PUBLICKEYBLOB (0x06)
|
|
blob [1] = 0x02; // Version - Always CUR_BLOB_VERSION (0x02)
|
|
// [2], [3] // RESERVED - Always 0
|
|
blob [5] = 0x24; // ALGID - Always 00 24 00 00 (for CALG_RSA_SIGN)
|
|
blob [8] = 0x52; // Magic - RSA1 (ASCII in hex)
|
|
blob [9] = 0x53;
|
|
blob [10] = 0x41;
|
|
blob [11] = 0x31;
|
|
|
|
byte[] bitlen = GetBytesLE (keyLength << 3);
|
|
blob [12] = bitlen [0]; // bitlen
|
|
blob [13] = bitlen [1];
|
|
blob [14] = bitlen [2];
|
|
blob [15] = bitlen [3];
|
|
|
|
// public exponent (DWORD)
|
|
int pos = 16;
|
|
int n = p.Exponent.Length;
|
|
while (n > 0)
|
|
blob [pos++] = p.Exponent [--n];
|
|
// modulus
|
|
pos = 20;
|
|
byte[] part = p.Modulus;
|
|
int len = part.Length;
|
|
Array.Reverse (part, 0, len);
|
|
Buffer.BlockCopy (part, 0, blob, pos, len);
|
|
pos += len;
|
|
return blob;
|
|
}
|
|
|
|
static public byte[] ToCapiPublicKeyBlob (DSA dsa)
|
|
{
|
|
DSAParameters p = dsa.ExportParameters (false);
|
|
int keyLength = p.P.Length; // in bytes
|
|
|
|
// header + P + Q + G + Y + count + seed
|
|
byte[] blob = new byte [16 + keyLength + 20 + keyLength + keyLength + 4 + 20];
|
|
|
|
blob [0] = 0x06; // Type - PUBLICKEYBLOB (0x06)
|
|
blob [1] = 0x02; // Version - Always CUR_BLOB_VERSION (0x02)
|
|
// [2], [3] // RESERVED - Always 0
|
|
blob [5] = 0x22; // ALGID
|
|
blob [8] = 0x44; // Magic
|
|
blob [9] = 0x53;
|
|
blob [10] = 0x53;
|
|
blob [11] = 0x31;
|
|
|
|
byte[] bitlen = GetBytesLE (keyLength << 3);
|
|
blob [12] = bitlen [0];
|
|
blob [13] = bitlen [1];
|
|
blob [14] = bitlen [2];
|
|
blob [15] = bitlen [3];
|
|
|
|
int pos = 16;
|
|
byte[] part;
|
|
|
|
part = p.P;
|
|
Array.Reverse (part);
|
|
Buffer.BlockCopy (part, 0, blob, pos, keyLength);
|
|
pos += keyLength;
|
|
|
|
part = p.Q;
|
|
Array.Reverse (part);
|
|
Buffer.BlockCopy (part, 0, blob, pos, 20);
|
|
pos += 20;
|
|
|
|
part = p.G;
|
|
Array.Reverse (part);
|
|
Buffer.BlockCopy (part, 0, blob, pos, keyLength);
|
|
pos += keyLength;
|
|
|
|
part = p.Y;
|
|
Array.Reverse (part);
|
|
Buffer.BlockCopy (part, 0, blob, pos, keyLength);
|
|
pos += keyLength;
|
|
|
|
Buffer.BlockCopy (GetBytesLE (p.Counter), 0, blob, pos, 4);
|
|
pos += 4;
|
|
|
|
part = p.Seed;
|
|
Array.Reverse (part);
|
|
Buffer.BlockCopy (part, 0, blob, pos, 20);
|
|
|
|
return blob;
|
|
}
|
|
|
|
// PRIVATEKEYBLOB
|
|
// PUBLICKEYBLOB
|
|
static public RSA FromCapiKeyBlob (byte[] blob)
|
|
{
|
|
return FromCapiKeyBlob (blob, 0);
|
|
}
|
|
|
|
static public RSA FromCapiKeyBlob (byte[] blob, int offset)
|
|
{
|
|
if (blob == null)
|
|
throw new ArgumentNullException ("blob");
|
|
if (offset >= blob.Length)
|
|
throw new ArgumentException ("blob is too small.");
|
|
|
|
switch (blob [offset]) {
|
|
case 0x00:
|
|
// this could be a public key inside an header
|
|
// like "sn -e" would produce
|
|
if (blob [offset + 12] == 0x06) {
|
|
return FromCapiPublicKeyBlob (blob, offset + 12);
|
|
}
|
|
break;
|
|
case 0x06:
|
|
return FromCapiPublicKeyBlob (blob, offset);
|
|
case 0x07:
|
|
return FromCapiPrivateKeyBlob (blob, offset);
|
|
}
|
|
throw new CryptographicException ("Unknown blob format.");
|
|
}
|
|
|
|
static public DSA FromCapiKeyBlobDSA (byte[] blob)
|
|
{
|
|
return FromCapiKeyBlobDSA (blob, 0);
|
|
}
|
|
|
|
static public DSA FromCapiKeyBlobDSA (byte[] blob, int offset)
|
|
{
|
|
if (blob == null)
|
|
throw new ArgumentNullException ("blob");
|
|
if (offset >= blob.Length)
|
|
throw new ArgumentException ("blob is too small.");
|
|
|
|
switch (blob [offset]) {
|
|
case 0x06:
|
|
return FromCapiPublicKeyBlobDSA (blob, offset);
|
|
case 0x07:
|
|
return FromCapiPrivateKeyBlobDSA (blob, offset);
|
|
}
|
|
throw new CryptographicException ("Unknown blob format.");
|
|
}
|
|
|
|
static public byte[] ToCapiKeyBlob (AsymmetricAlgorithm keypair, bool includePrivateKey)
|
|
{
|
|
if (keypair == null)
|
|
throw new ArgumentNullException ("keypair");
|
|
|
|
// check between RSA and DSA (and potentially others like DH)
|
|
if (keypair is RSA)
|
|
return ToCapiKeyBlob ((RSA)keypair, includePrivateKey);
|
|
else if (keypair is DSA)
|
|
return ToCapiKeyBlob ((DSA)keypair, includePrivateKey);
|
|
else
|
|
return null; // TODO
|
|
}
|
|
|
|
static public byte[] ToCapiKeyBlob (RSA rsa, bool includePrivateKey)
|
|
{
|
|
if (rsa == null)
|
|
throw new ArgumentNullException ("rsa");
|
|
|
|
if (includePrivateKey)
|
|
return ToCapiPrivateKeyBlob (rsa);
|
|
else
|
|
return ToCapiPublicKeyBlob (rsa);
|
|
}
|
|
|
|
static public byte[] ToCapiKeyBlob (DSA dsa, bool includePrivateKey)
|
|
{
|
|
if (dsa == null)
|
|
throw new ArgumentNullException ("dsa");
|
|
|
|
if (includePrivateKey)
|
|
return ToCapiPrivateKeyBlob (dsa);
|
|
else
|
|
return ToCapiPublicKeyBlob (dsa);
|
|
}
|
|
|
|
static public string ToHex (byte[] input)
|
|
{
|
|
if (input == null)
|
|
return null;
|
|
|
|
StringBuilder sb = new StringBuilder (input.Length * 2);
|
|
foreach (byte b in input) {
|
|
sb.Append (b.ToString ("X2", CultureInfo.InvariantCulture));
|
|
}
|
|
return sb.ToString ();
|
|
}
|
|
|
|
static private byte FromHexChar (char c)
|
|
{
|
|
if ((c >= 'a') && (c <= 'f'))
|
|
return (byte) (c - 'a' + 10);
|
|
if ((c >= 'A') && (c <= 'F'))
|
|
return (byte) (c - 'A' + 10);
|
|
if ((c >= '0') && (c <= '9'))
|
|
return (byte) (c - '0');
|
|
throw new ArgumentException ("invalid hex char");
|
|
}
|
|
|
|
static public byte[] FromHex (string hex)
|
|
{
|
|
if (hex == null)
|
|
return null;
|
|
if ((hex.Length & 0x1) == 0x1)
|
|
throw new ArgumentException ("Length must be a multiple of 2");
|
|
|
|
byte[] result = new byte [hex.Length >> 1];
|
|
int n = 0;
|
|
int i = 0;
|
|
while (n < result.Length) {
|
|
result [n] = (byte) (FromHexChar (hex [i++]) << 4);
|
|
result [n++] += FromHexChar (hex [i++]);
|
|
}
|
|
return result;
|
|
}
|
|
}
|
|
}
|