public static SignedCertificate CreateCertificate(string userAddress, string testCentreId, string privateKey, string photoUserId)
{
var ethEcKey = new Nethereum.Signer.EthECKey(privateKey);
var signer = new Nethereum.Signer.EthereumMessageSigner();
var signerAddress = ethEcKey.GetPublicAddress();
var signature = signer.EncodeUTF8AndSign(SignedCertificate.GetRawCertificate(userAddress, signerAddress, testCentreId, photoUserId), ethEcKey);
return(new SignedCertificate(userAddress, signerAddress, testCentreId, photoUserId, signature));
}
public const char ResponseSeparator = '|'; // Different for the certificate separator to make our lives easier
/// <summary>
/// Validates the signature matches the users in certificate,
/// Validates the certificate signer is including in the smart contract registry
/// Validates the certificate is still valid (ie not in the expired certificates)
/// </summary>
public async Task <SignedCertificate> ValidateCertificateAsync(string challenge, string response)
{
var responseValues = response.Split(ResponseSeparator);
var fullCertificate = responseValues[0];
var signature = responseValues[1];
var certificate = new SignedCertificate(fullCertificate);
if (!certificate.IsCertificateValid())
{
return(null); // Invalid certificate
}
if (!ValidChallengeSignature(challenge, signature, certificate.UserAddress))
{
return(null); //Signature does not match certificates signature
}
//Smart contract registry validation
return(await Task.FromResult(certificate));
}
