Cheesebaron.MvxPlugins.SimpleWebToken.SimpleWebToken.CreateToken C# (CSharp) Method

        public ISimpleWebToken CreateToken(
            string issuer, string audience, DateTime expiryTime, string signingKey,
            IEnumerable<KeyValuePair<string, string>> values = null)
        {
            if (string.IsNullOrEmpty(issuer)) throw new ArgumentNullException(nameof(issuer));
            if (string.IsNullOrEmpty(audience)) throw new ArgumentNullException(nameof(audience));
            if (string.IsNullOrEmpty(signingKey)) throw new ArgumentNullException(nameof(signingKey));

            if (expiryTime.Kind != DateTimeKind.Utc) throw new ArgumentOutOfRangeException(nameof(expiryTime), "Expiry time must be in UTC.");
            if (expiryTime < _swtBaseTime) throw new ArgumentOutOfRangeException(nameof(expiryTime), "Expiry time must be after 1970.");
            var signingKeyBytes = Convert.FromBase64String(signingKey);
            if (signingKeyBytes.Length != 32) throw new ArgumentOutOfRangeException(nameof(signingKey), "Signing key must be 32 bytes.");

            var token = new SimpleWebToken
            {
                Issuer = issuer,
                Audience = audience,
                ExpiresOn = expiryTime,
                Properties = new Dictionary<string, string>()
            };

            var sb = new StringBuilder();
            if (values != null)
            {
                foreach (var item in values)
                {
                    token.Properties.Add(item.Key, item.Value);
                    sb.AppendFormat("{0}={1}&", WebUtility.UrlEncode(item.Key), WebUtility.UrlEncode(item.Value));
                }
            }

            sb.AppendFormat("{0}={1}&", SimpleWebTokenConstants.Audience, WebUtility.UrlEncode(audience));
            sb.AppendFormat("{0}={1}&", SimpleWebTokenConstants.ExpiresOn, GetSwtTime(expiryTime));
            sb.AppendFormat("{0}={1}", SimpleWebTokenConstants.Issuer, WebUtility.UrlEncode(issuer));
            token.Signature = GenerateSignature(sb.ToString(), signingKeyBytes);
            sb.AppendFormat("&{0}={1}", SimpleWebTokenConstants.Signature, WebUtility.UrlEncode(token.Signature));

            token.RawToken = sb.ToString();
            return token;
        }