Generate password

calcPw.cs

/* ========================================================================
 * Copyright 2012 new013231@gmail.com
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ========================================================================
 */

public static string calcPw (string basePw, string usage)
{
	string combStr = basePw + usage;
	SHA256 shaHasher = SHA256Managed.Create ();
	byte[] shaVal = shaHasher.ComputeHash (Encoding.UTF8.GetBytes (combStr));
	string pw = Convert.ToBase64String (shaVal).Substring (0, 16);
	if (Regex.IsMatch (pw, "^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])[^+/]*$"))
		return pw;
	else
		return calcPw (pw, usage);
}