// reads the contents of the file and appends an MD5
private void SignRunLogFile()
{
var readConfigStream = new FileStream(_outputRunLogFileName, FileMode.Open, FileAccess.Read);
string hashThis = "";
using (StreamReader streamConfigReader = new StreamReader(readConfigStream))
{
hashThis = streamConfigReader.ReadToEnd();
}
var writeConfigStream = new FileStream(_outputRunLogFileName, FileMode.Append, FileAccess.Write);
using (StreamWriter streamConfigWriter = new StreamWriter(writeConfigStream))
{
streamConfigWriter.WriteLine("----------------------------------------------------------");
streamConfigWriter.WriteLine("OpenPseudonymiser Config Security: " + CryptHelper.md5encrypt(hashThis + "seal"));
}
}
/// <summary>
/// Takes a name value pair collection and produces the digest
/// An exception is throw if GetDigest() is called without first setting the salt, or setting the salt to a blank string.
/// Note all whitespace is stripped from the data in any field used here.
/// </summary>
/// <param name="nameValuePairs">One or more pairs of key/data to be used when creating the digest.</param>
/// <returns>The Digest</returns>
public string GetDigest(SortedList <string, string> nameValuePairs)
{
if (_salt == null || _salt == "")
{
throw new ApplicationException("Salt must be set before calling this method. Salt cannot be a blank string.");
}
// the fields get appended in alphabetical order, with the salt on the end
string hashThis = "";
// Get the columns for the digest, this is a sorted list we always get aphabetically ordered keys
foreach (string key in nameValuePairs.Keys)
{
hashThis += nameValuePairs[key];
}
hashThis = RemoveBlanks(hashThis);
hashThis += _salt;
return(CryptHelper.sha256encrypt(hashThis));
}