public void Encrypt(Span <byte> input, int packetCounter, Span <byte> output, Span <byte> tag)
{
if (!_threadInitialized)
{
_nounceBuffer = new byte[12];
}
// turn counter into an array
_nounceBuffer[8] = (byte)(packetCounter << 24);
_nounceBuffer[9] = (byte)(packetCounter << 16);
_nounceBuffer[10] = (byte)(packetCounter << 8);
_nounceBuffer[11] = (byte)packetCounter;
_aesGcm.Encrypt(_nounceBuffer, input, output, tag);
}
public void EncryptSameResultAsDotNetStandard()
{
byte[] plainText = new byte[] { 0xf5, 0x6e, 0x87, 0x05, 0x5b, 0xc3, 0x2d, 0x0e, 0xeb, 0x31, 0xb2, 0xea, 0xcc, 0x2b, 0xf2, 0xa5 };
var nonce = new byte[12] {
0x99, 0xaa, 0x3e, 0x68, 0xed, 0x81, 0x73, 0xa0, 0xee, 0xd0, 0x66, 0x84
};
byte[] cipherText = new byte[16];
byte[] tag = new byte[16];
_aesGcm.Encrypt(nonce, plainText, cipherText, tag);
using (var aesGcmDotnetStandard = new System.Security.Cryptography.AesGcm(_key))
{
byte[] expectedCipherText = new byte[16];
byte[] expectedTag = new byte[16];
aesGcmDotnetStandard.Encrypt(nonce, plainText, expectedCipherText, expectedTag);
CollectionAssert.AreEqual(expectedCipherText, cipherText);
CollectionAssert.AreEqual(expectedTag, tag);
}
}