public void DecodeTest()
{
VoteDecoder decoder = new VoteDecoder("db77d62fc88726f1c5a6b79b003b3bca83349e334337de84bd17344ab601db74".ParseHexEncodedValue());
// Голос номер 778136
//"{""message"":""7a2baaff59b5f862cff20fc059af42d9110bb5f6"",""nonce"":""6fe1a5f2052c79252a01bcb1f1019c7a92fd8e45c9504171"",""public_key"":""69e7b55df3370efd381e5a6c5c86002f3194183c3559f48705401152b6304313""}";"2212294583";"#2697378";"17:24:58";"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"
EncryptedVote evote = new EncryptedVote("7a2baaff59b5f862cff20fc059af42d9110bb5f6", "6fe1a5f2052c79252a01bcb1f1019c7a92fd8e45c9504171", "69e7b55df3370efd381e5a6c5c86002f3194183c3559f48705401152b6304313");
Assert.IsTrue(decoder.DecodeEndVerify(evote, out byte[] decoded));
//"778136";77;"0x2bddd3d05570be9d417bd0b28d54e7adcf1f3c19b7ff74ae011ba9f31b7da7b7";"#606026";"16:56:59";"{""message"":""7a2baaff59b5f862cff20fc059af42d9110bb5f6"",""nonce"":""6fe1a5f2052c79252a01bcb1f1019c7a92fd8e45c9504171"",""public_key"":""69e7b55df3370efd381e5a6c5c86002f3194183c3559f48705401152b6304313""}"
Assert.AreEqual(2212294583, BitConverter.ToUInt32(decoded));
}
public IActionResult Post([FromForm] VoteModel content)
{
using var batchEncoder = _sealService.CreateBatchEncoder();
using var encryptor = _sealService.CreateEncryptor();
//create a vector with data
var voteMatrix = new ulong[2];
voteMatrix[0] = content.IsBiden;
voteMatrix[1] = content.IsTrump;
using var plainMatrix = new Plaintext();
//encode the vector
batchEncoder.Encode(voteMatrix, plainMatrix);
var voteMatrixCipher = new Ciphertext();
//encrypt the vector with HE
encryptor.Encrypt(plainMatrix, voteMatrixCipher);
//serialize encrypted data
var encryptedMatrixBytes = SealUtils.CiphertextToArray(voteMatrixCipher);
var encryptedVote = new EncryptedVote
{
Data = encryptedMatrixBytes,
DateOfVote = DateTimeOffset.UtcNow,
Voter = content.DisplayName,
};
var dataToSign = JsonConvert.SerializeObject(encryptedVote, Formatting.None);
var signature = RCASignString(dataToSign);
//generate a vote id and store the encrypted vote. In the real system that would be an azure storage account or file system.
var voteId = Guid.NewGuid().ToString("N");
_votes.TryAdd(voteId, encryptedVote);
// return the encrypted vote to the user.
return(Ok(new
{
EncryptedVote = encryptedVote,
Signature = signature,
voteId,
}));
}