Instagram API强制签名请求+无效签名-请求：签名不匹配

Question

string GenerateSignature(string endpoint, 
         Dictionary<string, string> parameters, string secret) {

    StringBuilder message = new StringBuilder(endpoint);

    foreach (var param in parameters.OrderBy(p => p.Key))
    {
        message.AppendFormat("|{0}={1}", param.Key, param.Value);
    }

    return HMACSHA256_Hash(secret, message.ToString());
}

string HMACSHA256_Hash(string secret, string message)
{
    // Create a HMAC-SHA256 digest of the message using the secret key
    HMACSHA256 hmac = new HMACSHA256(Encoding.UTF8.GetBytes(secret));
    byte[] digest = hmac.ComputeHash(Encoding.UTF8.GetBytes(message.ToString()));

    // Return the digest as a hexstring to be used as a signature for the request
    return ByteArrayToString(digest);
}

string ByteArrayToString(byte[] array)
{
    // Convert the bytes in the array to a lower-case hexstring
    return array.Aggregate(new StringBuilder(), (sb, b) => sb.Append(b.ToString("x2"))).ToString();
}

protected void GetUserDetails()
{
    string instagram_Username = "";
    string instagram_UserID = "";
    string instagram_AccessToken = "";
    string instagram_ClientID = "";
    string instagram_ClientSecret = "";

    int count = 1;

    string url = String.Format(@"https://api.instagram.com/v1/users/{0}/media/recent?client_id={1}&count={2}", instagram_UserID, instagram_ClientID, count);
    string endPoint = String.Format("/users/{0}/media/recent", instagram_UserID);

    Dictionary<string, string> endPointParameters = new Dictionary<string, string>();
    endPointParameters.Add("client_id", instagram_ClientID);
    endPointParameters.Add("count", count.ToString());

    string signature = GenerateSignature(endPoint, endPointParameters, instagram_AccessToken);
    url = url + "&sig=" + signature;
}

我很感激你的帮助！多谢

Answer 1

string signature = GenerateSignature(endPoint, endPointParameters, instagram_ClientSecret);