public void RSASimpleTest()
{
var data = new BigInteger(123456).ToByteArray();
var(publicKey, privateKey) = RSAKeyGenerator.Generate();
var sign = RSA.Crypt(data, privateKey);
var decryptedData = RSA.Crypt(sign, publicKey);
data.Should().BeEquivalentTo(decryptedData, options => options.WithStrictOrdering());
}
public void CanGenerateValidKey()
{
var keyGen = new RSAKeyGenerator();
var key = keyGen.Generate(512);
var plainText = new BigInteger(123456789);
var cipherText = BigInteger.ModPow(plainText, key.E, key.N);
var actualPlainText = BigInteger.ModPow(cipherText, key.D, key.N);
Assert.AreEqual(plainText, actualPlainText);
}
public void RSAFunctionalTest()
{
var data = new byte[123456];
new Random().NextBytes(data);
var hash = SHA512.GetHash(data);
var(publicKey, privateKey) = RSAKeyGenerator.Generate();
var sign = RSA.Crypt(hash, privateKey);
var decryptedHash = RSA.Crypt(sign, publicKey);
hash.Should().BeEquivalentTo(decryptedHash, options => options.WithStrictOrdering());
}
public void CanEncryptDecryptMessage()
{
var keyGen = new RSAKeyGenerator();
var key = keyGen.Generate(512);
var plainText = "the quick brown fox jumped over the lazy dog";
var data = new BigInteger(Encoding.UTF8.GetBytes(plainText)).ToByteArray();
var rsa = new RSA(key);
var cipherText = rsa.Encrypt(data);
var plainTextBytes = rsa.Decrypt(cipherText);
var actualPlainText = Encoding.UTF8.GetString(plainTextBytes);
Assert.AreEqual(plainText, actualPlainText);
}