WindowsストアアプリでTwitterのライブラリを作ってみようと思い、OAuthBase.csをそのまま引っ張ってきたら何かとエラー…。
そこでOAuthBase.csをWindowsStoreApp用に少し書き換えてみました。
不具合&ソースがわかりにくいところがあるかもしれませんがご了承ください。大半はそのままで、暗号化の部分などを書き換えています
using System; using System.Collections.Generic; using System.Net; using System.Text; using Windows.Security.Cryptography; using Windows.Security.Cryptography.Core; namespace OAuth { public class OAuthBase { /// /// Provides a predefined set of algorithms that are supported officially by the protocol /// public enum SignatureTypes { HMACSHA1, PLAINTEXT, RSASHA1 } /// /// Provides an internal structure to sort the query parameter /// protected class QueryParameter { private string name = null; private string value = null; public QueryParameter(string name, string value) { this.name = name; this.value = value; } public string Name { get { return name; } } public string Value { get { return value; } } } /// /// Comparer class used to perform the sorting of the query parameters /// protected class QueryParameterComparer : IComparer { #region IComparer Members public int Compare(QueryParameter x, QueryParameter y) { if (x.Name == y.Name) { return string.Compare(x.Value, y.Value); } else { return string.Compare(x.Name, y.Name); } } #endregion } protected const string OAuthVersion = "1.0"; protected const string OAuthParameterPrefix = "oauth_"; // // List of know and used oauth parameters' names // protected const string OAuthConsumerKeyKey = "oauth_consumer_key"; protected const string OAuthCallbackKey = "oauth_callback"; protected const string OAuthVersionKey = "oauth_version"; protected const string OAuthSignatureMethodKey = "oauth_signature_method"; protected const string OAuthSignatureKey = "oauth_signature"; protected const string OAuthTimestampKey = "oauth_timestamp"; protected const string OAuthNonceKey = "oauth_nonce"; protected const string OAuthTokenKey = "oauth_token"; protected const string OAuthTokenSecretKey = "oauth_token_secret"; protected const string HMACSHA1SignatureType = "HMAC-SHA1"; protected const string PlainTextSignatureType = "PLAINTEXT"; protected const string RSASHA1SignatureType = "RSA-SHA1"; protected Random random = new Random(); protected string unreservedChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.~"; private string ComputeHash(HashAlgorithmProvider hashAlgorithm, string data) { if (hashAlgorithm == null) { throw new ArgumentNullException("hashAlgorithm"); } if (string.IsNullOrEmpty(data)) { throw new ArgumentNullException("data"); } return CryptographicBuffer.EncodeToBase64String(CryptographicBuffer.ConvertStringToBinary(data, BinaryStringEncoding.Utf8)); } private List GetQueryParameters(string parameters) { if (parameters.StartsWith("?")) { parameters = parameters.Remove(0, 1); } List result = new List(); if (!string.IsNullOrEmpty(parameters)) { string[] p = parameters.Split('&'); foreach (string s in p) { if (!string.IsNullOrEmpty(s) && !s.StartsWith(OAuthParameterPrefix)) { if (s.IndexOf('=') > -1) { string[] temp = s.Split('='); result.Add(new QueryParameter(temp[0], temp[1])); } else { result.Add(new QueryParameter(s, string.Empty)); } } } } return result; } protected string UrlEncode(string value) { StringBuilder result = new StringBuilder(); foreach (char symbol in value) { if (unreservedChars.IndexOf(symbol) != -1) { result.Append(symbol); } else { result.Append('%' + String.Format("{0:X2}", (int)symbol)); } } return result.ToString(); } protected string NormalizeRequestParameters(IList parameters) { StringBuilder sb = new StringBuilder(); QueryParameter p = null; for (int i = 0; i < parameters.Count; i++) { p = parameters[i]; sb.AppendFormat("{0}={1}", p.Name, p.Value); if (i < parameters.Count - 1) { sb.Append("&"); } } return sb.ToString(); } public string GenerateSignatureBase(Uri url, string consumerKey, string token, string tokenSecret, string httpMethod, string timeStamp, string nonce, string signatureType, out string normalizedUrl, out string normalizedRequestParameters) { if (token == null) { token = string.Empty; } if (tokenSecret == null) { tokenSecret = string.Empty; } if (string.IsNullOrEmpty(consumerKey)) { throw new ArgumentNullException("consumerKey"); } if (string.IsNullOrEmpty(httpMethod)) { throw new ArgumentNullException("httpMethod"); } if (string.IsNullOrEmpty(signatureType)) { throw new ArgumentNullException("signatureType"); } normalizedUrl = null; normalizedRequestParameters = null; List parameters = GetQueryParameters(url.Query); parameters.Add(new QueryParameter(OAuthVersionKey, OAuthVersion)); parameters.Add(new QueryParameter(OAuthNonceKey, nonce)); parameters.Add(new QueryParameter(OAuthTimestampKey, timeStamp)); parameters.Add(new QueryParameter(OAuthSignatureMethodKey, signatureType)); parameters.Add(new QueryParameter(OAuthConsumerKeyKey, consumerKey)); if (!string.IsNullOrEmpty(token)) { parameters.Add(new QueryParameter(OAuthTokenKey, token)); } parameters.Sort(new QueryParameterComparer()); normalizedUrl = string.Format("{0}://{1}", url.Scheme, url.Host); if (!((url.Scheme == "http" && url.Port == 80) || (url.Scheme == "https" && url.Port == 443))) { normalizedUrl += ":" + url.Port; } normalizedUrl += url.AbsolutePath; normalizedRequestParameters = NormalizeRequestParameters(parameters); StringBuilder signatureBase = new StringBuilder(); signatureBase.AppendFormat("{0}&", httpMethod.ToUpper()); signatureBase.AppendFormat("{0}&", UrlEncode(normalizedUrl)); signatureBase.AppendFormat("{0}", UrlEncode(normalizedRequestParameters)); return signatureBase.ToString(); } public string GenerateSignature(Uri url, string consumerKey, string consumerSecret, string token, string tokenSecret, string httpMethod, string timeStamp, string nonce, out string normalizedUrl, out string normalizedRequestParameters) { return GenerateSignature(url, consumerKey, consumerSecret, token, tokenSecret, httpMethod, timeStamp, nonce, SignatureTypes.HMACSHA1, out normalizedUrl, out normalizedRequestParameters); } public string GenerateSignature(Uri url, string consumerKey, string consumerSecret, string token, string tokenSecret, string httpMethod, string timeStamp, string nonce, SignatureTypes signatureType, out string normalizedUrl, out string normalizedRequestParameters) { normalizedUrl = null; normalizedRequestParameters = null; switch (signatureType) { case SignatureTypes.PLAINTEXT: return WebUtility.UrlEncode(string.Format("{0}&{1}", consumerSecret, tokenSecret)); case SignatureTypes.HMACSHA1: string signatureBase = GenerateSignatureBase(url, consumerKey, token, tokenSecret, httpMethod, timeStamp, nonce, HMACSHA1SignatureType, out normalizedUrl, out normalizedRequestParameters); System.Diagnostics.Debug.WriteLine(signatureBase); return GenerateSignatureUsingHash_HMACSHA1(string.Format("{0}&{1}", UrlEncode(consumerSecret), string.IsNullOrEmpty(tokenSecret) ? "" : UrlEncode(tokenSecret)), signatureBase); case SignatureTypes.RSASHA1: throw new NotImplementedException(); default: throw new ArgumentException("Unknown signature type", "signatureType"); } } private string GenerateSignatureUsingHash_HMACSHA1(string Key, string data) { var crypt = Windows.Security.Cryptography.Core.MacAlgorithmProvider.OpenAlgorithm("HMAC_SHA1"); var keyBuffer = Windows.Security.Cryptography.CryptographicBuffer.CreateFromByteArray(Encoding.UTF8.GetBytes(Key)); var cryptKey = crypt.CreateKey(keyBuffer); var dataBuffer = Windows.Security.Cryptography.CryptographicBuffer.CreateFromByteArray(Encoding.UTF8.GetBytes(data)); var signBuffer = Windows.Security.Cryptography.Core.CryptographicEngine.Sign(cryptKey, dataBuffer); byte[] value; Windows.Security.Cryptography.CryptographicBuffer.CopyToByteArray(signBuffer, out value); return Convert.ToBase64String(value); } /// /// Generate the timestamp for the signature /// /// public virtual string GenerateTimeStamp() { // Default implementation of UNIX time of the current UTC time TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0); return Convert.ToInt64(ts.TotalSeconds).ToString(); } /// /// Generate a nonce /// /// public virtual string GenerateNonce_() { // Just a simple implementation of a random number between 123400 and 9999999 return random.Next(123400, 9999999).ToString(); } /// /// Generate a nonce /// /// public virtual string GenerateNonce() { // Just a simple implementation of a random number between 123400 and 9999999 string strings = "0123456789abcdefghijklmnopqrstuvwxyABCDEFGHIJKLMNOPQRSTUVWXYZ"; string res = ""; for (int i = 0; i < 32; i++) res += strings[random.Next(0, strings.Length - 1)]; return res; } } }
WindowsStoreAppではASCIIは使えないようです