public bool CompareTo(params HashDataProvider[] hashDataProviders)
{
HashProvider hasher = new HashProvider (_hashAlgo);
byte[] localHash = hasher.Hash (hashDataProviders);
return ByteHelper.CompareByteArrays (_digest, localHash);
}
/// <summary>
/// Locks the password and calculates the password hash
/// </summary>
public void Hash()
{
if (_protectedHash != null)
{
throw new NotSupportedException("Cannot hash twice");
}
if (_injectedHash != null)
{
return;
}
_plainPassword.MakeReadOnly();
HashProvider hashProvider = new HashProvider(_hashAlgo);
//The array fpr protected memory needs to have multiple size of 16
//int byteArrayLength =
// 4 // 4 bytes size of the actual hash value
// + hashProvider.HashBitSize/8;
//byteArrayLength += byteArrayLength % 16;
//byte[] myHashValue = new byte[byteArrayLength];
_currentHashSize = hashProvider.HashBitSize / 8;
byte[] myHashValue = new byte[_currentHashSize];
hashProvider.Hash(myHashValue, 0, new HashSecureStringDataProvider(_plainPassword));
//HACK: It's not sure that the converted strings get deleted by the
// garbage collector. Use ProtectedMemory as soon as possible
_protectedHash = new SecureString();
foreach (byte b in myHashValue)
{
string hexString = string.Format("{0:X2}", b);
foreach (char c in hexString)
{
_protectedHash.AppendChar(c);
}
}
//Writes the size of the ahsh value to the start of the hashvalue array
//Array.Copy(BitConverter.GetBytes((int)hashProvider.HashBitSize/8), myHashValue, 4);
//Hash value starts at index 4
//hashProvider.Hash(myHashValue, 4, new HashSecureStringDataProvider(_plainPassword));
//ProtectedData.Protect(hashProvider, null, DataProtectionScope.
//ProtectedMemory.Protect(myHashValue, MemoryProtectionScope.SameProcess);
}
/// <summary>
/// Locks the password and calculates the password hash
/// </summary>
public void Hash()
{
if (_protectedHash != null)
throw new NotSupportedException ("Cannot hash twice");
if(_injectedHash != null)
return;
_plainPassword.MakeReadOnly ();
HashProvider hashProvider = new HashProvider (_hashAlgo);
//The array fpr protected memory needs to have multiple size of 16
//int byteArrayLength =
// 4 // 4 bytes size of the actual hash value
// + hashProvider.HashBitSize/8;
//byteArrayLength += byteArrayLength % 16;
//byte[] myHashValue = new byte[byteArrayLength];
_currentHashSize = hashProvider.HashBitSize / 8;
byte[] myHashValue = new byte[_currentHashSize];
hashProvider.Hash (myHashValue, 0, new HashSecureStringDataProvider (_plainPassword));
//HACK: It's not sure that the converted strings get deleted by the
// garbage collector. Use ProtectedMemory as soon as possible
_protectedHash = new SecureString ();
foreach (byte b in myHashValue)
{
string hexString = string.Format ("{0:X2}", b);
foreach (char c in hexString)
_protectedHash.AppendChar (c);
}
//Writes the size of the ahsh value to the start of the hashvalue array
//Array.Copy(BitConverter.GetBytes((int)hashProvider.HashBitSize/8), myHashValue, 4);
//Hash value starts at index 4
//hashProvider.Hash(myHashValue, 4, new HashSecureStringDataProvider(_plainPassword));
//ProtectedData.Protect(hashProvider, null, DataProtectionScope.
//ProtectedMemory.Protect(myHashValue, MemoryProtectionScope.SameProcess);
}
private static void TestHMAC()
{
ILog log = LogManager.GetLogger("TestHMAC");
HashProvider hash = new HashProvider();
byte[] h1 = hash.Hash(
new HashPrimitiveDataProvider((uint)0x3c),
new HashPrimitiveDataProvider((ushort)0x00),
new HashEnumDataProvider(testenum.test),
new HashByteDataProvider(new byte[]{0xb3,0xd5,0xcb, 0x12,0x73,
0x8b, 0xb6, 0xf9, 0x21, 0xa3,
0xda, 0x42,0xe0, 0x18, 0xd1,
0x43, 0xfa, 0x29, 0x7c, 0xa6}));
HMACProvider hmac = new HMACProvider(
new byte[]{0x75, 0xf0, 0x86, 0x84, 0x78,
0x24, 0xf8, 0x79, 0x39, 0x5a,
0x18, 0x14, 0x1d, 0x19, 0x0c,
0x2f, 0x01, 0x29, 0x0b, 0x05});
byte[] h2 = new byte[20];
for(int i = 0; i<20; i++)
h2[i] = 0xa5;
byte[] h3 = new byte[]{
0xb9, 0x73, 0x05, 0xfa, 0xdb,
0xe3, 0x4d, 0xc5, 0x46, 0x65,
0x10, 0x00, 0x0a, 0x55, 0x04,
0x2e, 0x3f, 0xea, 0xbf, 0x27};
byte[] result = hmac.Hash(new HashByteDataProvider(h1),
new HashByteDataProvider(h2),
new HashByteDataProvider(h3),
new HashPrimitiveDataProvider(true));
byte[] expected = new byte[]{
0x26, 0x7e, 0xca, 0x16, 0xa1,
0x4d, 0x36, 0xe6, 0x72, 0x2e,
0xaa, 0x7f, 0x7b, 0x53, 0x4a,
0xb3, 0xce, 0x8b, 0x2a, 0xaa};
for(int i = 0; i<20; i++)
{
if(result[i] != expected[i])
Console.WriteLine("FAILED");
}
Console.WriteLine("SUCCESS");
}
