public string DecryptString(string text, EncryptionTypeEnums type)
{
try
{
string password = GetPassword(type);
byte[] baPwd = Encoding.UTF8.GetBytes(password);
byte[] baPwdHash = SHA256.Create().ComputeHash(baPwd);
byte[] baText = Convert.FromBase64String(text);
byte[] baDecrypted = AES_Decrypt(baText, baPwdHash);
int saltLength = GetSaltLength();
byte[] baResult = new byte[baDecrypted.Length - saltLength];
for (int i = 0; i < baResult.Length; i++)
{
baResult[i] = baDecrypted[i + saltLength];
}
string result = Encoding.UTF8.GetString(baResult);
return(result);
}
catch (Exception ex)
{
throw ex;
}
}
public string EncryptString(string text, EncryptionTypeEnums type)
{
try
{
string password = GetPassword(type);
byte[] baPwd = Encoding.UTF8.GetBytes(password);
byte[] baPwdHash = SHA256.Create().ComputeHash(baPwd);
byte[] baText = Encoding.UTF8.GetBytes(text);
byte[] baSalt = GetRandomBytes();
byte[] baEncrypted = new byte[baSalt.Length + baText.Length];
for (int i = 0; i < baSalt.Length; i++)
{
baEncrypted[i] = baSalt[i];
}
for (int i = 0; i < baText.Length; i++)
{
baEncrypted[i + baSalt.Length] = baText[i];
}
baEncrypted = AES_Encrypt(baEncrypted, baPwdHash);
string result = Convert.ToBase64String(baEncrypted);
return(result);
}
catch (Exception ex)
{
throw ex;
}
}
private string GetPassword(EncryptionTypeEnums type)
{
switch (type)
{
case EncryptionTypeEnums.Member:
return(EncryptionPassword.MemberEncryptionPassword);
default:
throw new Exception("Encryption password not available");
}
}