Live Server Problem With OAuthUtils.cs

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Hello

I am using oAuth for Google and Yahoo Login Below is the code.

this is code is working fine for localhost and when I uploaded this file on the live server it is showing

Compiler Error Message: CS1031: Type expected

error is on this line

C#

public static string GetStringValue(this Enum value)

this code is for OAuthUtils.cs

C#

using System;
using System.Collections.Generic;
using System.Reflection;
using System.Security.Cryptography;
using System.Text;

namespace Matlus.FederatedIdentity
{
    // Reference page on Google: http://code.google.com/apis/accounts/docs/OAuth_ref.html
    // Reference page on Twitter: http://dev.twitter.com/pages/auth#at-twitter
    // Reference page on Yahoo: http://developer.yahoo.com/oauth/guide/oauth-auth-flow.html
    // Reference page on Vimeo: http://vimeo.com/api/docs/oauth


    public class OAuthUtils
    {
        #region Private Nested Classes

        private class ProtocolParameter
        {
            public string Name { get; private set; }
            public string Value { get; private set; }

            public ProtocolParameter(string name, string value)
            {
                Name = name;
                Value = value;
            }
        }

        private class LexicographicComparer : IComparer<protocolparameter>
        {
            public int Compare(ProtocolParameter x, ProtocolParameter y)
            {
                if (x.Name == y.Name)
                    return string.Compare(x.Value, y.Value);
                else
                    return string.Compare(x.Name, y.Name);
            }
        }

        #endregion Private Nested Classes

        //http://en.wikipedia.org/wiki/Percent-encoding
        private readonly static string reservedCharacters = "!*'();:@&=+$,/?%#[]";
        private const string OAuthVersion = "1.0";
        private const string OAuthProtocolParameterPrefix = "oauth_";

        private static Random random = new Random();

        #region Private static methods

        private static string GenerateTimeStamp()
        {
            TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1);
            return Math.Truncate(ts.TotalSeconds).ToString();
        }

        private static string GenerateNonce(string timestamp)
        {
            var buffer = new byte[256];
            random.NextBytes(buffer);
            var hmacsha1 = new HMACSHA1();
            hmacsha1.Key = Encoding.ASCII.GetBytes(Encoding.ASCII.GetString(buffer));
            return ComputeHash(hmacsha1, timestamp);
        }

        private static string ComputeHash(HashAlgorithm hashAlgorithm, string data)
        {
            if (hashAlgorithm == null)
                throw new ArgumentNullException("hashAlgorithm");
            if (string.IsNullOrEmpty(data))
                throw new ArgumentNullException("data");

            byte[] buffer = System.Text.Encoding.ASCII.GetBytes(data);
            byte[] bytes = hashAlgorithm.ComputeHash(buffer);

            return Convert.ToBase64String(bytes);
        }

        private static string NormalizeProtocolParameters(IList<protocolparameter> parameters)
        {
            var sb = new StringBuilder();
            ProtocolParameter p = null;
            for (int i = 0; i < parameters.Count; i++)
            {
                p = parameters[i];
                sb.AppendFormat("{0}={1}", p.Name, UrlEncode(p.Value));

                if (i < parameters.Count - 1)
                {
                    sb.Append("&");
                }
            }

            return sb.ToString();
        }

        private static List<protocolparameter> ExtractQueryStrings(string url)
        {
            int questionIndex = url.IndexOf('?');
            if (questionIndex == -1)
                return new List<protocolparameter>();

            var parameters = url.Substring(questionIndex + 1);
            var result = new List<protocolparameter>();

            if (!String.IsNullOrEmpty(parameters))
            {
                string[] parts = parameters.Split('&');
                foreach (var part in parts)
                {
                    if (!string.IsNullOrEmpty(part) && !part.StartsWith(OAuthProtocolParameterPrefix))
                    {
                        if (part.IndexOf('=') != -1)
                        {
                            string[] nameValue = part.Split('=');
                            result.Add(new ProtocolParameter(nameValue[0], nameValue[1]));
                        }
                        else
                            result.Add(new ProtocolParameter(part, String.Empty));
                    }
                }
            }
            return result;
        }

        private string GenerateSignatureBaseString(string url, string httpMethod, List<protocolparameter> protocolParameters)
        {
            protocolParameters.Sort(new LexicographicComparer());

            var uri = new Uri(url);
            var normalizedUrl = string.Format("{0}://{1}", uri.Scheme, uri.Host);

            if (!((uri.Scheme == "http" && uri.Port == 80) || (uri.Scheme == "https" && uri.Port == 443)))
                normalizedUrl += ":" + uri.Port;
            normalizedUrl += uri.AbsolutePath;

            var normalizedRequestParameters = NormalizeProtocolParameters(protocolParameters);

            StringBuilder signatureBaseSb = new StringBuilder();
            signatureBaseSb.AppendFormat("{0}&", httpMethod);
            signatureBaseSb.AppendFormat("{0}&", UrlEncode(normalizedUrl));
            signatureBaseSb.AppendFormat("{0}", UrlEncode(normalizedRequestParameters));
            return signatureBaseSb.ToString();
        }

        private static string GenerateSignature(string consumerSecret, SignatureMethod signatureMethod, string signatureBaseString, string tokenSecret)
        {
            tokenSecret = null;
            switch (signatureMethod)
            {
                case SignatureMethod.HMACSHA1:
                    var hmacsha1 = new HMACSHA1();
                    hmacsha1.Key = Encoding.ASCII.GetBytes(String.Format("{0}&{1}", UrlEncode(consumerSecret), String.IsNullOrEmpty(tokenSecret) ? "" : UrlEncode(tokenSecret)));
                    return ComputeHash(hmacsha1, signatureBaseString);
                case SignatureMethod.PLAINTEXT:
                    throw new NotImplementedException("PLAINTEXT Signature Method type is not yet implemented");
                case SignatureMethod.RSASHA1:
                    throw new NotImplementedException("RSA-SHA1 Signature Method type is not yet implemented");
                default:
                    throw new ArgumentException("Unknown Signature Method", "signatureMethod");
            }
        }

        #endregion Private static methods

        #region Public Static Methods

        public static string UrlEncode(string value)
        {
            if (String.IsNullOrEmpty(value))
                return String.Empty;

            var sb = new StringBuilder();

            foreach (char @char in value)
            {
                if (reservedCharacters.IndexOf(@char) == -1)
                    sb.Append(@char);
                else
                    sb.AppendFormat("%{0:X2}", (int)@char);
            }
            return sb.ToString();
        }

        #endregion Public Static Methods

        public AuthorizeHeader GetRequestTokenAuthorizationHeader(string url, string realm, string consumerKey, string consumerSecret, string callbackUrl, SignatureMethod signatureMethod , string httpMethod)
        {
            var urlEncodedCallback = UrlEncode(callbackUrl);
            var timestamp = GenerateTimeStamp();
            var nounce = GenerateNonce(timestamp);

            signatureMethod = SignatureMethod.HMACSHA1;
            httpMethod = "POST";

            var protocolParameters = ExtractQueryStrings(url);
            protocolParameters.Add(new ProtocolParameter(OAuthProtocolParameter.ConsumerKey.GetStringValue(), consumerKey));
            protocolParameters.Add(new ProtocolParameter(OAuthProtocolParameter.SignatureMethod.GetStringValue(), signatureMethod.GetStringValue()));
            protocolParameters.Add(new ProtocolParameter(OAuthProtocolParameter.Timestamp.GetStringValue(), timestamp));
            protocolParameters.Add(new ProtocolParameter(OAuthProtocolParameter.Nounce.GetStringValue(), nounce));
            protocolParameters.Add(new ProtocolParameter(OAuthProtocolParameter.Version.GetStringValue(), OAuthVersion));
            protocolParameters.Add(new ProtocolParameter(OAuthProtocolParameter.Callback.GetStringValue(), callbackUrl));

            string signatureBaseString = GenerateSignatureBaseString(url, httpMethod, protocolParameters);
            var signature = GenerateSignature(consumerSecret, signatureMethod, signatureBaseString,consumerKey);
            return new AuthorizeHeader(realm, consumerKey, signatureMethod.GetStringValue(), signature, timestamp, nounce, OAuthVersion, callbackUrl);
        }

        public AuthorizeHeader GetAccessTokenAuthorizationHeader(string url, string realm, string consumerKey, string consumerSecret, string token, string verifier, string tokenSecret, SignatureMethod signatureMethod, string httpMethod)
        {
            var timestamp = GenerateTimeStamp();
            var nounce = GenerateNonce(timestamp);
            signatureMethod = SignatureMethod.HMACSHA1;
            httpMethod = "POST";

            var protocolParameters = ExtractQueryStrings(url);
            protocolParameters.Add(new ProtocolParameter(OAuthProtocolParameter.ConsumerKey.GetStringValue(), consumerKey));
            protocolParameters.Add(new ProtocolParameter(OAuthProtocolParameter.SignatureMethod.GetStringValue(), signatureMethod.GetStringValue()));
            protocolParameters.Add(new ProtocolParameter(OAuthProtocolParameter.Timestamp.GetStringValue(), timestamp));
            protocolParameters.Add(new ProtocolParameter(OAuthProtocolParameter.Nounce.GetStringValue(), nounce));
            protocolParameters.Add(new ProtocolParameter(OAuthProtocolParameter.Version.GetStringValue(), OAuthVersion));
            protocolParameters.Add(new ProtocolParameter(OAuthProtocolParameter.Token.GetStringValue(), token));
            protocolParameters.Add(new ProtocolParameter(OAuthProtocolParameter.Verifier.GetStringValue(), verifier));

            string signatureBaseString = GenerateSignatureBaseString(url, httpMethod, protocolParameters);
            System.Diagnostics.Debug.WriteLine(signatureBaseString);

            var signature = GenerateSignature(consumerSecret, signatureMethod, signatureBaseString, tokenSecret);
            return new AuthorizeHeader(realm, consumerKey, signatureMethod.GetStringValue(), signature, timestamp, nounce, OAuthVersion, token, verifier);
        }

        public AuthorizeHeader GetUserInfoAuthorizationHeader(string url, string realm, string consumerKey, string consumerSecret, string token, string tokenSecret, SignatureMethod signatureMethod, string httpMethod)
        {
            signatureMethod = SignatureMethod.HMACSHA1;
            httpMethod = "POST";
            System.Diagnostics.Debug.WriteLine("");
            System.Diagnostics.Debug.WriteLine(token);
            System.Diagnostics.Debug.WriteLine(tokenSecret);
            System.Diagnostics.Debug.WriteLine("----");
            var timestamp = GenerateTimeStamp();
            var nounce = GenerateNonce(timestamp);

            var protocolParameters = ExtractQueryStrings(url);
            protocolParameters.Add(new ProtocolParameter(OAuthProtocolParameter.ConsumerKey.GetStringValue(), consumerKey));
            protocolParameters.Add(new ProtocolParameter(OAuthProtocolParameter.SignatureMethod.GetStringValue(), signatureMethod.GetStringValue()));
            protocolParameters.Add(new ProtocolParameter(OAuthProtocolParameter.Timestamp.GetStringValue(), timestamp));
            protocolParameters.Add(new ProtocolParameter(OAuthProtocolParameter.Nounce.GetStringValue(), nounce));
            protocolParameters.Add(new ProtocolParameter(OAuthProtocolParameter.Version.GetStringValue(), OAuthVersion));
            protocolParameters.Add(new ProtocolParameter(OAuthProtocolParameter.Token.GetStringValue(), token));

            string signatureBaseString = GenerateSignatureBaseString(url, httpMethod, protocolParameters);
            System.Diagnostics.Debug.WriteLine(signatureBaseString);

            var signature = GenerateSignature(consumerSecret, signatureMethod, signatureBaseString, tokenSecret);
            return new AuthorizeHeader(realm, consumerKey, signatureMethod.GetStringValue(), signature, timestamp, nounce, OAuthVersion, token, null);
        }

    }

    public enum SignatureMethod
    {
        [EnumStringValueAttribute("HMAC-SHA1")]
        HMACSHA1,
        [EnumStringValueAttribute("RSA-SHA1")]
        RSASHA1,
        [EnumStringValueAttribute("PLAINTEXT")]
        PLAINTEXT
    }

    internal enum OAuthProtocolParameter
    {
        [EnumStringValueAttribute("oauth_consumer_key")]
        ConsumerKey,
        [EnumStringValueAttribute("oauth_signature_method")]
        SignatureMethod,
        [EnumStringValueAttribute("oauth_signature")]
        Signature,
        [EnumStringValueAttribute("oauth_timestamp")]
        Timestamp,
        [EnumStringValueAttribute("oauth_nonce")]
        Nounce,
        [EnumStringValueAttribute("oauth_version")]
        Version,
        [EnumStringValueAttribute("oauth_callback")]
        Callback,
        [EnumStringValueAttribute("oauth_verifier")]
        Verifier,
        [EnumStringValueAttribute("oauth_token")]
        Token,
        [EnumStringValueAttribute("oauth_token_secret")]
        TokenSecret
    }

    [AttributeUsage(AttributeTargets.Field)]
    public class EnumStringValueAttribute : Attribute
    {
        public string Value { get; private set; }

        public EnumStringValueAttribute(string value)
        {
            Value = value;
        }
    }

    public static class EnumStringValueExtension
    {
        //this Enum value;
        public static string GetStringValue(this Enum value)
        {
            string output = null;
            Type type = value.GetType();
            FieldInfo fieldInfo = type.GetField(value.ToString());
            EnumStringValueAttribute[] attributes = fieldInfo.GetCustomAttributes(typeof(EnumStringValueAttribute), false) as EnumStringValueAttribute[];
            if (attributes.Length > 0)
                output = attributes[0].Value;
            return output;
        }
    }
}
 </protocolparameter></protocolparameter></protocolparameter></protocolparameter></protocolparameter></protocolparameter>

Now , What is the solution for this problem.

Can anyone suggest me so that I can solve this problem

Thanks,
Deepak

Posted 22-Oct-11 9:44am

aryan2010

Updated 22-Oct-11 21:18pm

v2

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Comments

Sergey Alexandrovich Kryukov 22-Oct-11 22:26pm

Or boy, who will show me where is the line 309?!! Do you understand that it means abusing the reader of this question?
--SA

aryan2010 23-Oct-11 3:24am

Hello Boy,

You have checked the the error that I have mentioned line number 309 but U have not checked that I also mentioned the where I am getting the error.

I am getting error for

public static string GetStringValue(this Enum value)

Thanks for commenting before reading whole post.

Deepak

1 solution

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OriginalGriff · Answer 1 · 2011-10-22T21:49:00

Since it is complaining about the declaration of an extension method:

C#

public static string GetStringValue(this Enum value)

My best guess is that the live server is not running version 3.0 or higher of the .NET framework. Extension methods were introduced at V3.0, so to earlier versions the syntax is meaningless.