/// <summary>
/// Encode a ProxyToken to base64 JWT, and sign it with the private key
/// provided by the certificate.
/// </summary>
/// <param name="payload">
/// The ProxyToken to be encoded.
/// </param>
/// <param name="signingCertificate">
/// The X509Certificate which includes the private key to sign the JWT.
/// </param>
/// <returns>
/// The base64 encoded JWT with signature appended.
/// </returns>
public static string Encode(ProxyToken payload, X509Certificate2 signingCertificate)
{
// header, payload and signature are joint by dot
// header.payload.signature
var segments = new List <string>();
// RS256 is the ONLY algorithm that works
var header = new JwtHeader {
typ = Type, alg = SigningAlgorithm
};
// x5t is the base64 encoded SHA1 hash of the certificate
// must use SHA1 hash algorithm here
header.x5t = Base64Helper.Base64Encode(signingCertificate.GetCertHash());
// header and payload should be encoded using UTF8
var base64header = Base64Helper.Base64Encode(Encoding.UTF8.GetBytes(header.ToString()));
var base64payload = Base64Helper.Base64Encode(Encoding.UTF8.GetBytes(payload.ToString()));
segments.Add(base64header);
segments.Add(base64payload);
// what we sign is the base64 encoded result
var stringToSign = string.Join(".", segments.ToArray());
// sign the data: header and payload
var signature = RSASigningHelper.SignData(
// data to be signed should use ASCII encoding
Encoding.ASCII.GetBytes(stringToSign),
signingCertificate, HashAlgorithm);
segments.Add(Base64Helper.Base64Encode(signature));
return(string.Join(".", segments.ToArray()));
}
public string SignatureEncode(PersonDTO personDTO)
{
//medium.com/vandium-software/5-easy-steps-to-understanding-json-web-tokens-jwt-1164c0adfcec
var header = new JwtHeader()
{
type = "JWT", algorithm = "HMACmd5"
};
var payload = new JwtPayload()
{
Id = personDTO.Id, Email = personDTO.Email, PersonId = personDTO.PersonId
};
var data = System.Text.Encoding.UTF8.GetBytes(header.ToString() + payload.ToString());
//var signature
var key = System.Text.Encoding.UTF8.GetBytes("key123");
// Create HMAC-MD5 Algorithm;
var hmac = new HMACMD5(key);
// Compute hash.
var hashBytes = hmac.ComputeHash(data);
// Convert to HEX string.
return(System.BitConverter.ToString(hashBytes).Replace("-", "").ToLower());
}
