public static async Task <GetCommandStatus> Get(DevParam devParam, string publickeyJson, string pin = "")
{
try {
var publickey = JsonConvert.DeserializeObject <PublicKeyforGet>(publickeyJson);
publickey.pin = pin;
return(await Get(devParam, publickey));
} catch (Exception ex) {
var status = new GetCommandStatus();
status.msg = ex.Message.ToString();
return(status);
}
}
public static bool Verify(GetCommandStatus status, byte[] publickey, int assertion_index = 0)
{
if (status.assertions.Count <= 0 || status.assertions.Count < assertion_index + 1)
{
return(false);
}
var pubkeypem = ConvertCOSEtoPEM(publickey);
foreach (var command in status.commands)
{
if (command.cmd.GetType() == typeof(CTAPauthenticatorGetAssertion))
{
var get = ((CTAPauthenticatorGetAssertion)(command.cmd));
// verify assertion
return(Verify(get.RpId, get.ClientDataHash, pubkeypem, status.assertions[assertion_index]));
}
}
return(false);
}
public static async Task <GetCommandStatus> Get(DevParam devParam, PublicKeyforGet publickey)
{
var status = new GetCommandStatus();
try {
string rpid = publickey.rpId;
var ctap = new CTAPauthenticatorGetAssertion();
ctap.RpId = rpid;
ctap.ClientDataHash = CTAPauthenticator.CreateClientDataHash(publickey.challenge);
ctap.Timeout = publickey.timeout;
// credential-id
if (publickey.allowCredentials != null &&
publickey.allowCredentials.Count > 0 &&
publickey.allowCredentials[0] != null &&
publickey.allowCredentials[0].id != null &&
publickey.allowCredentials[0].id.Length > 0)
{
ctap.AllowList_CredentialId = publickey.allowCredentials[0].id;
}
ctap.Option_up = publickey.requireUserPresence;
if (publickey.userVerification == UserVerificationRequirement.discouraged)
{
ctap.Option_uv = false;
}
else
{
ctap.Option_uv = true;
}
// pin
if (publickey.pin.Length > 0)
{
string pin = publickey.pin;
var ctap2 = new CTAPauthenticatorClientPIN();
var st1 = await ctap2.GetKeyAgreement(devParam);
status.commands.Add(new CommandStatus.CommandInfo(ctap2, st1));
if (st1.Status != 0)
{
throw (new Exception("GetKeyAgreement"));
}
var sharedSecret = ctap2.createSharedSecret(ctap2.Authenticator_KeyAgreement);
var pinHashEnc = ctap2.createPinHashEnc(pin, sharedSecret);
var token = await ctap2.GetPINToken(devParam, pinHashEnc);
status.commands.Add(new CommandStatus.CommandInfo(ctap2, token));
if (token.Status != 0)
{
throw (new Exception("GetPINToken"));
}
ctap.PinAuth = ctap2.createPinAuth(sharedSecret, ctap.ClientDataHash, token.PinTokenEnc);
}
var ret = await ctap.SendAndResponse(devParam);
status.commands.Add(new CommandStatus.CommandInfo(ctap, ret));
if (ret.Status != 0)
{
throw (new Exception("GetAssertion"));
}
status.assertions.Add(ret);
if (ret.NumberOfCredentials > 0)
{
for (int intIc = 0; intIc < ret.NumberOfCredentials - 1; intIc++)
{
var next = new CTAPauthenticatorGetNextAssertion();
var nextret = await next.SendAndResponse(devParam);
status.commands.Add(new CommandStatus.CommandInfo(next, nextret));
if (ret.Status != 0)
{
throw (new Exception("GetNextAssertion"));
}
status.assertions.Add(nextret);
}
}
// uv=trueでリクエストしてuvされていなければエラー
if (ctap.Option_uv)
{
if (ret.Flags_UserVerifiedResult == false)
{
throw (new Exception("UserVerifiedResult False"));
}
}
status.isSuccess = true;
} catch (Exception ex) {
status.setErrorMsg(ex);
}
return(status);
}