private static bool VerifySignedHash(RSAParameters key, byte[] hash, byte[] signature)
{
byte[] numArray = new byte[(int)key.Modulus.Length];
byte[] numArray1 = new byte[(int)key.Exponent.Length];
byte[] numArray2 = new byte[(int)signature.Length];
Array.Copy(key.Modulus, numArray, (int)key.Modulus.Length);
Array.Copy(key.Exponent, numArray1, (int)key.Exponent.Length);
Array.Copy(signature, numArray2, (int)signature.Length);
Array.Reverse(numArray);
Array.Reverse(numArray1);
Array.Reverse(numArray2);
BigInteger bigInteger = new BigInteger(numArray);
BigInteger bigInteger1 = new BigInteger(numArray1);
BigInteger bigInteger2 = BigInteger.PowMod(new BigInteger(numArray2), bigInteger1, bigInteger);
byte[] numArray3 = new byte[(int)key.Modulus.Length];
byte[] fieldHandle = new byte[] { typeof(< PrivateImplementationDetails >).GetField("$field-2FFAC053D2D8FD53E1733DCE28216805289D3E35").FieldHandle };
if (!SslSocket.MakePKCS1SignatureBlock(hash, (int)hash.Length, fieldHandle, (int)fieldHandle.Length, numArray3, (int)key.Modulus.Length))
{
return(false);
}
byte[] numArray4 = new byte[(int)numArray3.Length];
Array.Copy(numArray3, numArray4, (int)numArray3.Length);
Array.Reverse(numArray4);
return((new BigInteger(numArray4)).CompareTo(bigInteger2) == 0);
}
private static bool VerifySignedHash(RSAParameters key, byte[] hash, byte[] signature)
{
byte[] array = new byte[key.Modulus.Length];
byte[] array2 = new byte[key.Exponent.Length];
byte[] array3 = new byte[signature.Length];
Array.Copy(key.Modulus, array, key.Modulus.Length);
Array.Copy(key.Exponent, array2, key.Exponent.Length);
Array.Copy(signature, array3, signature.Length);
Array.Reverse(array);
Array.Reverse(array2);
Array.Reverse(array3);
BigInteger mod = new BigInteger(array);
BigInteger exp = new BigInteger(array2);
BigInteger b = new BigInteger(array3);
BigInteger value = BigInteger.PowMod(b, exp, mod);
byte[] array4 = new byte[key.Modulus.Length];
byte[] array5 = new byte[]
{
48,
49,
48,
13,
6,
9,
96,
134,
72,
1,
101,
3,
4,
2,
1,
5,
0,
4,
32
};
if (!SslSocket.MakePKCS1SignatureBlock(hash, hash.Length, array5, array5.Length, array4, key.Modulus.Length))
{
return(false);
}
byte[] array6 = new byte[array4.Length];
Array.Copy(array4, array6, array4.Length);
Array.Reverse(array6);
BigInteger bigInteger = new BigInteger(array6);
return(bigInteger.CompareTo(value) == 0);
}
