private bool ValidatePasswordEncrypted(UserPartRecord partRecord, string password) {
return String.Equals(password, Encoding.UTF8.GetString(_encryptionService.Decode(Convert.FromBase64String(partRecord.Password))), StringComparison.Ordinal);
}
private static bool ValidatePasswordHashed(UserPartRecord partRecord, string password) {
var saltBytes = Convert.FromBase64String(partRecord.PasswordSalt);
var passwordBytes = Encoding.Unicode.GetBytes(password);
var combinedBytes = saltBytes.Concat(passwordBytes).ToArray();
byte[] hashBytes;
using (var hashAlgorithm = HashAlgorithm.Create(partRecord.HashAlgorithm)) {
hashBytes = hashAlgorithm.ComputeHash(combinedBytes);
}
return partRecord.Password == Convert.ToBase64String(hashBytes);
}
private void SetPasswordEncrypted(UserPartRecord partRecord, string password) {
partRecord.Password = Convert.ToBase64String(_encryptionService.Encode(Encoding.UTF8.GetBytes(password)));
partRecord.PasswordSalt = null;
}
private static void SetPasswordHashed(UserPartRecord partRecord, string password) {
var saltBytes = new byte[0x10];
using (var random = new RNGCryptoServiceProvider()) {
random.GetBytes(saltBytes);
}
var passwordBytes = Encoding.Unicode.GetBytes(password);
var combinedBytes = saltBytes.Concat(passwordBytes).ToArray();
byte[] hashBytes;
using (var hashAlgorithm = HashAlgorithm.Create(partRecord.HashAlgorithm)) {
hashBytes = hashAlgorithm.ComputeHash(combinedBytes);
}
partRecord.PasswordFormat = MembershipPasswordFormat.Hashed;
partRecord.Password = Convert.ToBase64String(hashBytes);
partRecord.PasswordSalt = Convert.ToBase64String(saltBytes);
}
private static bool ValidatePasswordClear(UserPartRecord partRecord, string password) {
return partRecord.Password == password;
}
private static void SetPasswordClear(UserPartRecord partRecord, string password) {
partRecord.PasswordFormat = MembershipPasswordFormat.Clear;
partRecord.Password = password;
partRecord.PasswordSalt = null;
}
private bool ValidatePassword(UserPartRecord partRecord, string password) {
// Note - the password format stored with the record is used
// otherwise changing the password format on the site would invalidate
// all logins
switch (partRecord.PasswordFormat) {
case MembershipPasswordFormat.Clear:
return ValidatePasswordClear(partRecord, password);
case MembershipPasswordFormat.Hashed:
return ValidatePasswordHashed(partRecord, password);
case MembershipPasswordFormat.Encrypted:
return ValidatePasswordEncrypted(partRecord, password);
default:
throw new ApplicationException("Unexpected password format value");
}
}
void SetPassword(UserPartRecord partRecord, string password) {
switch (GetSettings().PasswordFormat) {
case MembershipPasswordFormat.Clear:
SetPasswordClear(partRecord, password);
break;
case MembershipPasswordFormat.Hashed:
SetPasswordHashed(partRecord, password);
break;
case MembershipPasswordFormat.Encrypted:
SetPasswordEncrypted(partRecord, password);
break;
default:
throw new ApplicationException(T("Unexpected password format value").ToString());
}
}
