public void CalculateSharedSecretWithSelfPubKey()
{
using (var secp256k1 = new Secp256k1())
{
Span <byte> privateKey = "90cc2eb9f4ac1562546c9899b5a68fc98a8add85a606abd506058e75ce583f49".HexToBytes();
Span <byte> publicKey = stackalloc byte[64];
Span <byte> sharedSecret = stackalloc byte[32];
secp256k1.PublicKeyCreate(publicKey, privateKey);
secp256k1.CalculateSharedSecret(sharedSecret, publicKey, privateKey);
Assert.Equal(32, sharedSecret.Length);
Assert.Equal("3e9a315412415ab738658e7f2119c434e7c2112862315d0af756d03d923874ae", sharedSecret.ToHexString());
}
}
public void CalculateSharedSecretWithAnotherPubKey()
{
using (var secp256k1 = new Secp256k1())
{
Span <byte> privateKey = "90cc2eb9f4ac1562546c9899b5a68fc98a8add85a606abd506058e75ce583f49".HexToBytes();
Span <byte> privateKey2 = "e815acba8fcf085a0b4141060c13b8017a08da37f2eb1d6a5416adbb621560ef".HexToBytes();
Span <byte> publicKey = stackalloc byte[64];
Span <byte> sharedSecret = stackalloc byte[32];
secp256k1.PublicKeyCreate(publicKey, privateKey2);
secp256k1.CalculateSharedSecret(sharedSecret, publicKey, privateKey);
Assert.Equal(32, sharedSecret.Length);
Assert.Equal("8fd6cc22898c5bddf1b6e596f131cea5f09ef2122f57852a90137959101bace1", sharedSecret.ToHexString());
}
}