private static string GetSignature(string args, string privatekey)
{
var encoding = new System.Text.UTF8Encoding();
byte[] key = encoding.GetBytes(privatekey);
var myhmacsha256 = new System.Security.Cryptography.HMACSHA256(key);
byte[] hashValue = myhmacsha256.ComputeHash(encoding.GetBytes(args));
string hmac64 = Convert.ToBase64String(hashValue);
myhmacsha256.Clear();
return(hmac64);
}
public static String CaculateHMAC(String key,String mesg)
{
byte[] data = System.Text.Encoding.UTF8.GetBytes(mesg);
byte[] keyData = System.Text.Encoding.UTF8.GetBytes(key);
//HMACSHA1オブジェクトの作成
System.Security.Cryptography.HMACSHA256 hmac = new System.Security.Cryptography.HMACSHA256(keyData);
//ハッシュ値を計算
byte[] bs = hmac.ComputeHash(data);
//リソースを解放する
hmac.Clear();
//byte型配列を16進数に変換
return BitConverter.ToString(bs).ToLower().Replace("-", "");
}
/// <summary>
/// 站内应用使用SignedRequest获取AccessToken
/// </summary>
/// <param name="signedRequest">SignedRequest</param>
/// <returns></returns>
public AccessToken GetAccessTokenBySignedRequest(string signedRequest)
{
string[] parameters = signedRequest.Split('.');
if (parameters.Length < 2)
{
throw new Exception("SignedRequest格式错误。");
}
var encodedSig = parameters[0];
var payload = parameters[1];
var sha256 = new System.Security.Cryptography.HMACSHA256(Encoding.UTF8.GetBytes(AppSecret));
var expectedSig = Convert.ToBase64String(sha256.ComputeHash(Encoding.UTF8.GetBytes(payload)));
sha256.Clear();
encodedSig = parameters[0].Length % 4 == 0 ? parameters[0] : parameters[0].PadRight(parameters[0].Length + (4 - parameters[0].Length % 4), '=').Replace("-", "+").Replace("_", "/");
payload = parameters[1].Length % 4 == 0 ? parameters[1] : parameters[1].PadRight(parameters[1].Length + (4 - parameters[1].Length % 4), '=').Replace("-", "+").Replace("_", "/");
if (encodedSig != expectedSig)
{
throw new WeiboException("SignedRequest签名验证失败。");
}
var result = JObject.Parse(Encoding.UTF8.GetString(Convert.FromBase64String(payload)));
if (result["oauth_token"] == null)
{
return(null); //throw new WeiboException("没有获取到授权信息，请先进行授权。");
}
AccessToken token = new AccessToken();
AccessToken = token.Token = result["oauth_token"].ToString();
token.UID = result["user_id"].ToString();
token.ExpiresIn = Convert.ToInt32(result["expires"].ToString());
return(token);
}
/// <summary>
/// 站内应用使用SignedRequest获取AccessToken
/// </summary>
/// <param name="signedRequest">SignedRequest</param>
/// <returns></returns>
public AccessToken GetAccessTokenBySignedRequest(string signedRequest)
{
string[] parameters = signedRequest.Split('.');
if (parameters.Length < 2)
throw new Exception("SignedRequest格式错误。");
var encodedSig = parameters[0];
var payload = parameters[1];
var sha256 = new System.Security.Cryptography.HMACSHA256(Encoding.UTF8.GetBytes(AppSecret));
var expectedSig = Convert.ToBase64String(sha256.ComputeHash(Encoding.UTF8.GetBytes(payload)));
sha256.Clear();
encodedSig = parameters[0].Length % 4 == 0 ? parameters[0] : parameters[0].PadRight(parameters[0].Length + (4 - parameters[0].Length % 4), '=').Replace("-", "+").Replace("_", "/");
payload = parameters[1].Length % 4 == 0 ? parameters[1] : parameters[1].PadRight(parameters[1].Length + (4 - parameters[1].Length % 4), '=').Replace("-", "+").Replace("_", "/");
if(encodedSig != expectedSig)
throw new WeiboException("SignedRequest签名验证失败。");
var result = JObject.Parse(Encoding.UTF8.GetString(Convert.FromBase64String(payload)));
if (result["oauth_token"] == null)
return null;//throw new WeiboException("没有获取到授权信息，请先进行授权。");
AccessToken token = new AccessToken();
AccessToken = token.Token = result["oauth_token"].ToString();
token.UID = result["user_id"].ToString();
token.ExpiresIn = Convert.ToInt32(result["expires"].ToString());
return token;
}
