private string Encrypt(string data)
{
if (String.IsNullOrEmpty(data))
{
return(String.Empty);
}
if (EncryptionVersion == 2)
{
var bytes = Encoding.UTF8.GetBytes(data);
switch (EncryptionMode)
{
case EncryptionMode.Basic:
return(Base64.Encode(SymmetricEncryption.Encrypt(bytes, userId)));
case EncryptionMode.Pattern:
return(Base64.Encode(SymmetricEncryption.Encrypt(bytes, pattern.Concat(userId))));
case EncryptionMode.Password:
return(Base64.Encode(SymmetricEncryption.Encrypt(bytes, password)));
default:
throw new NotImplementedException("Encryption mode not supported: " + EncryptionMode);
}
}
else
{
throw new NotImplementedException("Encryption version not supported: " + EncryptionMode);
}
}
public static string GeneratePasswordHash(string salt, string password)
{
byte[] hash = Hash(salt + FixedSalt + Base64.Encode(Encrypt(password, GetCryptoAlgorithm())));
for (int i = 1; i < HashRounds; i++)
{
hash = Hash(hash);
}
return(Base64.Encode(hash));
}
private string Encrypt(string data)
{
if (String.IsNullOrEmpty(data))
{
return(String.Empty);
}
EncryptionVersion = 3;
EncryptionMode = EncryptionMode.Basic;
cryptoConfig.ChecksumSize = RecommendedChecksumSize;
cryptoConfig.Iterations = RecommendedIterations;
cryptoConfig.SaltSize = RecommendedSaltSize;
if (pattern != null && pattern.Length > 0)
{
EncryptionMode = EncryptionMode.Pattern;
}
if (password != null && password.Length > 0)
{
EncryptionMode = EncryptionMode == EncryptionMode.Pattern ? EncryptionMode.PatternAndPassword : EncryptionMode.Password;
}
var aesEncryptor = new AesEncryptor(cryptoConfig);
switch (EncryptionMode)
{
case EncryptionMode.Basic:
return(Base64.Encode(aesEncryptor.Encrypt(data, userId)));
case EncryptionMode.Pattern:
return(Base64.Encode(aesEncryptor.Encrypt(data, pattern.Concat(userId))));
case EncryptionMode.Password:
return(Base64.Encode(aesEncryptor.Encrypt(data, password)));
case EncryptionMode.PatternAndPassword:
return(Base64.Encode(aesEncryptor.Encrypt(data, password.Concat(pattern))));
default:
throw new NotImplementedException("Encryption mode not supported: " + EncryptionMode);
}
}
