/// <summary>
/// Converts public key to CAN ID format.
/// </summary>
/// <param name="PublicKey">Ed25519 public key.</param>
/// <returns>CAN ID that corresponds to the the public.</returns>
public static byte[] PublicKeyToId(byte[] PublicKey)
{
CanCryptoKey key = new CanCryptoKey()
{
Type = CanCryptoKey.Types.KeyType.Ed25519,
Data = ProtocolHelper.ByteArrayToByteString(PublicKey)
};
byte[] hash = Crypto.Sha256(key.ToByteArray());
byte[] res = new byte[2 + hash.Length];
res[0] = 0x12; // SHA256 hash prefix
res[1] = (byte)hash.Length;
Array.Copy(hash, 0, res, 2, hash.Length);
return(res);
}
/// <summary>
/// Refreshes profile server's IPNS record in CAN.
/// </summary>
/// <param name="IpnsRecord">IPNS record to refresh.</param>
/// <param name="PublicKey">Public key of the IPNS record owner.</param>
/// <returns>Structure describing whether the function succeeded and response provided by CAN server.</returns>
public async Task <CanRefreshIpnsResult> RefreshIpnsRecord(CanIpnsEntry IpnsRecord, byte[] PublicKey)
{
log.Trace("(PublicKey:'{0}')", PublicKey.ToHex());
string ipnsRecordEncoded = IpnsRecord.ToByteArray().ToBase64UrlPad(true);
CanCryptoKey cryptoKey = new CanCryptoKey()
{
Type = CanCryptoKey.Types.KeyType.Ed25519,
Data = ProtocolHelper.ByteArrayToByteString(PublicKey)
};
string keyEncoded = Base58Encoding.Encoder.Encode(cryptoKey.ToByteArray());
log.Debug("Encoding public key: {0}", keyEncoded);
NameValueCollection args = new NameValueCollection();
args.Add("arg", ipnsRecordEncoded);
args.Add("key", keyEncoded);
CanApiResult apiResult = await SendRequest("name/upload", args);
CanRefreshIpnsResult res = CanRefreshIpnsResult.FromApiResult(apiResult);
if (res.Success)
{
res.IsCanError = false;
// Check that the ID, path and sequence number match what we expect.
string canId = CanApi.PublicKeyToId(PublicKey).ToBase58();
if (res.Details.Peer == canId)
{
string path = Encoding.UTF8.GetString(IpnsRecord.Value.ToByteArray());
if (res.Details.NewPath == path)
{
if (res.Details.NewSeq == IpnsRecord.Sequence)
{
// All OK.
}
else
{
log.Warn("CAN sequence is {0}, received {1}.", IpnsRecord.Sequence, res.Details.NewSeq);
res.Success = false;
res.Message = "CAN path in response does not match expected value.";
}
}
else
{
log.Warn("CAN path is '{0}', received '{1}'.", path, res.Details.NewPath);
res.Success = false;
res.Message = "CAN path in response does not match expected value.";
}
}
else
{
log.Warn("CAN ID is '{0}', received '{1}'.", canId, res.Details.Peer);
res.Success = false;
res.Message = "CAN ID in response does not match expected value.";
}
}
if (res.Success)
{
log.Trace("(-):*.Success={0}", res.Success);
}
else
{
log.Trace("(-):*.Success={0},*.IsCanError={1},*.Message='{2}'", res.Success, res.IsCanError, res.Message);
}
return(res);
}
