/// <summary>
/// Gets the refresh token from the specified content token.
/// </summary>
/// <param name="contextToken">SharePoint App Token as context token</param>
/// <returns>
/// Refresh Token as string
/// </returns>
public static string GetRefreshToken(string contextToken)
{
string refreshToken = string.Empty;
if (!string.IsNullOrWhiteSpace(contextToken))
{
SharePointContextToken contextTokenData = TokenHelper.ReadAndValidateContextToken(contextToken);
refreshToken = null != contextTokenData?EncryptionDecryption.Encrypt(contextTokenData.RefreshToken) : string.Empty;
}
return(refreshToken);
}
/// <summary>
/// Generates Client Context in case of online and onpremise deployments
/// </summary>
/// <param name="contextToken">SharePoint Application Token</param>
/// <param name="siteUrl">SharePoint site URL</param>
/// <param name="refreshToken">The refresh token</param>
/// <param name="currentIdentity">Current Identity object</param>
/// <returns>Client Context</returns>
private static ClientContext GetCommonContext(string contextToken, Uri siteUrl, string refreshToken, WindowsIdentity currentIdentity)
{
bool environment = Convert.ToBoolean(ConstantStrings.IsDeployedOnAzure, CultureInfo.InvariantCulture);
ClientContext result = null;
if (environment)
{
try
{
string decryptedRefreshToken = string.Empty;
string key = ConfigurationManager.AppSettings["Encryption_Key"];
if (!string.IsNullOrEmpty(refreshToken) && !string.IsNullOrEmpty(key))
{
decryptedRefreshToken = EncryptionDecryption.Decrypt(refreshToken, key);
if (!string.IsNullOrEmpty(decryptedRefreshToken))
{
result = FetchClientContext(contextToken, siteUrl, decryptedRefreshToken);
}
else
{
key = ConfigurationManager.AppSettings["Old_Encryption_Key"];
if (!string.IsNullOrEmpty(refreshToken) && !string.IsNullOrEmpty(key))
{
decryptedRefreshToken = EncryptionDecryption.Decrypt(refreshToken, key);
if (!string.IsNullOrEmpty(decryptedRefreshToken))
{
result = FetchClientContext(contextToken, siteUrl, decryptedRefreshToken);
}
}
}
}
}
catch (Exception exception)
{
Logger.LogError(exception, MethodBase.GetCurrentMethod().DeclaringType.Name, MethodBase.GetCurrentMethod().Name, ConstantStrings.LogTableName);
throw;
}
}
else
{
if (null != siteUrl)
{
result = TokenHelper.GetS2SClientContextWithWindowsIdentity(siteUrl, currentIdentity);
}
}
return(result);
}