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/* Transport Security Layer (TLS)
* Copyright (c) 2003 Carlos Guzmán Álvarez
*
* 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.Security.Cryptography;
namespace Mono.Security.Cryptography
{
internal class MD5SHA1CryptoServiceProvider : HashAlgorithm
{
#region FIELDS
private HashAlgorithm md5;
private HashAlgorithm sha;
private bool hashing;
#endregion
#region CONSTRUCTORS
public MD5SHA1CryptoServiceProvider()
{
this.md5 = new MD5CryptoServiceProvider();
this.sha = new SHA1CryptoServiceProvider();
// Set HashSizeValue
this.HashSizeValue = this.md5.HashSize + this.sha.HashSize;
}
#endregion
#region METHODS
public override void Initialize()
{
this.md5.Initialize();
this.sha.Initialize();
this.hashing = false;
}
protected override byte[] HashFinal()
{
if (!hashing)
{
this.hashing = true;
}
// Finalize the original hash
this.md5.TransformFinalBlock(new byte[0], 0, 0);
this.sha.TransformFinalBlock(new byte[0], 0, 0);
byte[] hash = new byte[36];
System.Array.Copy(this.md5.Hash, 0, hash, 0, 16);
System.Array.Copy(this.sha.Hash, 0, hash, 16, 20);
return hash;
}
protected override void HashCore(
byte[] array,
int ibStart,
int cbSize)
{
if (!hashing)
{
hashing = true;
}
this.md5.TransformBlock(array, ibStart, cbSize, array, ibStart);
this.sha.TransformBlock(array, ibStart, cbSize, array, ibStart);
}
public byte[] CreateSignature(RSA rsa)
{
if (rsa == null)
{
throw new CryptographicUnexpectedOperationException ("missing key");
}
#warning "MD5SHA1 hash is not supported by .NET"
RSAPKCS1SignatureFormatter f = new RSAPKCS1SignatureFormatter(rsa);
f.SetHashAlgorithm("MD5SHA1");
return f.CreateSignature(this.Hash);
}
public bool VerifySignature(RSA rsa, byte[] rgbSignature)
{
if (rsa == null)
{
throw new CryptographicUnexpectedOperationException ("missing key");
}
if (rgbSignature == null)
{
throw new ArgumentNullException ("rgbSignature");
}
#warning "MD5SHA1 hash is not supported by .NET"
RSAPKCS1SignatureDeformatter d = new RSAPKCS1SignatureDeformatter(rsa);
d.SetHashAlgorithm("MD5SHA1");
return d.VerifySignature(this.Hash, rgbSignature);
}
#endregion
}
}
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