public static void crypto_sign_keypair(byte[] pk, int pkoffset, byte[] sk, int skoffset, byte[] seed, int seedoffset)
{
GroupElementP3 A;
int i;
Array.Copy(seed, seedoffset, sk, skoffset, 32);
byte[] h = SHA512.Hash(sk, skoffset, 32);//ToDo: Remove alloc
ScalarOperations.sc_clamp(h, 0);
GroupOperations.ge_scalarmult_base(out A, h, 0);
GroupOperations.ge_p3_tobytes(pk, pkoffset, ref A);
for (i = 0; i < 32; ++i)
{
sk[skoffset + 32 + i] = pk[pkoffset + i];
}
CryptoExtensions.Wipe(h);
}
//Needs more testing
public static void KeyExchange(ArraySegment <byte> sharedKey, ArraySegment <byte> publicKey, ArraySegment <byte> privateKey)
{
Throw.If(sharedKey.Array == null, "sharedKey.Array");
Throw.If(publicKey.Array == null, "publicKey.Array");
Throw.If(privateKey.Array == null, "privateKey");
Throw.If(sharedKey.Count != 32, "sharedKey.Count != 32");
Throw.If(publicKey.Count != 32, "publicKey.Count != 32");
Throw.If(privateKey.Count != 64, "privateKey.Count != 64");
FieldElement montgomeryX, edwardsY, edwardsZ, sharedMontgomeryX;
FieldOperations.fe_frombytes(out edwardsY, publicKey.Array, publicKey.Offset);
FieldOperations.fe_1(out edwardsZ);
EdwardsToMontgomeryX(out montgomeryX, ref edwardsY, ref edwardsZ);
byte[] h = SHA512.Hash(privateKey.Array, privateKey.Offset, 32);//ToDo: Remove alloc
ScalarOperations.sc_clamp(h, 0);
MontgomeryOperations.scalarmult(out sharedMontgomeryX, h, 0, ref montgomeryX);
CryptoExtensions.Wipe(h);
FieldOperations.fe_tobytes(sharedKey.Array, sharedKey.Offset, ref sharedMontgomeryX);
KeyExchangeOutputHashNaCl(sharedKey.Array, sharedKey.Offset);
}
public void ShouldHashFilesAsBase64()
{
var tempFile = string.Format("{0}{1}.dat", Path.GetTempPath(), Guid.NewGuid());
const string testString = "My test content to hash with special chars 123!|\"£$%&/()=<>{}[]";
File.WriteAllText(tempFile, testString);
var result = _sut.Hash(new FileInfo(tempFile)).ToString(BinaryRepresentation.Base64);
result.Should().Be.EqualTo("9hqt0jVUaA+FixoayRIm2SWM644Meqw/gpwjij/5pFM4wtA8E/umbQ1bG52YMc8K+RQ5VLzuJvzDXvzClHvfyw==");
// Cleanup
if (File.Exists(tempFile))
{
File.Delete(tempFile);
}
}
