public Response Post(UsersProperties theModel)
{
if (string.IsNullOrEmpty(theModel.Username))
{
return(new Response
{
StatusCode = System.Net.HttpStatusCode.Moved,
Location = new Uri(RemoveOldQueryString(Context.Request.AbsoluteUri) + "?msg=1")
});
}
if (string.IsNullOrEmpty(theModel.OldPassword))
{
return(new Response
{
StatusCode = System.Net.HttpStatusCode.Moved,
Location = new Uri(RemoveOldQueryString(Context.Request.AbsoluteUri) + "?msg=2")
});
}
if (theModel.NewPassword != theModel.NewPasswordCheck)
{
return(new Response
{
StatusCode = System.Net.HttpStatusCode.Moved,
Location = new Uri(RemoveOldQueryString(Context.Request.AbsoluteUri) + "?msg=3")
});
}
if (string.IsNullOrEmpty(theModel.NewPassword))
{
return(new Response
{
StatusCode = System.Net.HttpStatusCode.Moved,
Location = new Uri(RemoveOldQueryString(Context.Request.AbsoluteUri) + "?msg=4")
});
}
Task <ProcessResult> UserEntries = ProcessRunner.GetProcessResultAsync("grep", "^" + theModel.Username + " /etc/shadow");
UserEntries.Wait();
var CommandResultLines = UserEntries.Result.GetOutput().Split(new string[] { "\n", "\r\n" }, StringSplitOptions.RemoveEmptyEntries)
.Select(line => line.TrimEnd())
.ToArray();
if (CommandResultLines.Length == 0)
{
return(new Response
{
StatusCode = System.Net.HttpStatusCode.Moved,
Location = new Uri(RemoveOldQueryString(Context.Request.AbsoluteUri) + "?msg=5")
});
}
if (CommandResultLines.Length > 1)
{
return(new Response
{
StatusCode = System.Net.HttpStatusCode.Moved,
Location = new Uri(RemoveOldQueryString(Context.Request.AbsoluteUri) + "?msg=6")
});
}
// Format of Line is Username$AlgorithmType$Salt$HashedPassword:OtherMeta
string UserEntry = CommandResultLines[0];
const string Dollar = "$";
const string Colon = ":";
int StartIndex = UserEntry.IndexOf(Dollar);
int EndHashAlgorithmTypeIndex = UserEntry.IndexOf(Dollar, StartIndex + Dollar.Length);
int EndSaltIndex = UserEntry.IndexOf(Dollar, EndHashAlgorithmTypeIndex + Dollar.Length);
int EndHashIndex = UserEntry.IndexOf(Colon, StartIndex + Dollar.Length);
string HashAlgorithmType = UserEntry.Substring(StartIndex, EndHashAlgorithmTypeIndex - StartIndex + Dollar.Length);
// Existing Hash, including the Algorithm Type $6$, the Salt and the Hash
string ExistingHash = UserEntry.Substring(StartIndex, EndHashIndex - StartIndex);
string Salt = UserEntry.Substring(EndHashAlgorithmTypeIndex + Dollar.Length, EndSaltIndex - EndHashAlgorithmTypeIndex - Dollar.Length);
string NewHash = Linux.Crypt(theModel.OldPassword, HashAlgorithmType + Salt + Dollar);
if (ExistingHash != NewHash)
{
return(new Response
{
StatusCode = System.Net.HttpStatusCode.Moved,
Location = new Uri(RemoveOldQueryString(Context.Request.AbsoluteUri) + "?msg=7")
});
}
Task <ProcessResult> ChangePassword = ProcessRunner.GetProcessResultAsync("bash", "-c \"echo '" + theModel.Username + ":" + theModel.NewPassword + "' | chpasswd\"");
ChangePassword.Wait();
if (ChangePassword.Result.Okay())
{
return(new Response
{
StatusCode = System.Net.HttpStatusCode.Moved,
Location = new Uri(RemoveOldQueryString(Context.Request.AbsoluteUri) + "?msg=10")
});
}
else
{
return(new Response
{
StatusCode = System.Net.HttpStatusCode.Moved,
Location = new Uri(RemoveOldQueryString(Context.Request.AbsoluteUri) + "?msg=9")
});
}
}
