Got an error. do i forgot some references?

https://uploads.disquscdn.c...

For those not running .Net Core and still using .Net Framework this would replace the 8 .AsSpan lines (technically 4):
byte[] authKeySalt = new byte[PasswordSaltByteSize];
Array.Copy(encryptedData, 0, authKeySalt, 0, PasswordSaltByteSize);
byte[] keySalt = new byte[PasswordSaltByteSize];
Array.Copy(encryptedData, PasswordSaltByteSize, keySalt, 0, PasswordSaltByteSize);
byte[] iv = new byte[AesBlockByteSize];
Array.Copy(encryptedData, 2 * PasswordSaltByteSize, iv, 0, AesBlockByteSize);
byte[] signatureTag = new byte[SignatureByteSize];
Array.Copy(encryptedData, encryptedData.Length - SignatureByteSize, signatureTag, 0, SignatureByteSize);

I also made the following changes below so that I could store BASE64 in my database:
.........
public static string EncryptString(string toEncrypt, string password)
.........
signatureTag.CopyTo(result, payloadToSignLength);
}

return Convert.ToBase64String(result);
}

public static string DecryptToString(string encryptedString, string password)
{
byte[] encryptedData = Convert.FromBase64String(encryptedString);
if (encryptedData is null
.........

Is there a reason you generate and save IV additionally while you can just derive it from the password? In your intermediate example it was clear why you needed IV - for extra randomness. But in the end you use PDBKF2 with a nonce anyway so why to save IV instead of generate? Overall why not to make IV just zero?

PasswordIterationCount is minimum 600000 now according to OWASP

You also can use the static method RandomNumberGenerator.GetBytes(count) to generate a random byte array without .Create() an RNG instance.

Hi, I tried to decrypt this using an online tool but cannot decrypt it because it will ask for the key.
How can I used this and can be decrypt on the other platform like mobile app.

Hey Tom, how could I change this to have a key length of 256 bits(256/8), when I try and change the values I get invalid key size errors?

Hi tom, is it possible to customize the results of the encryption text using this aes algorithm.
I have an encryption case how to do a conversion from string to digit string as an example

plaintext: "KSJJ12BK1J2B4KJBSFDJB"
chipertext: "001238912389"

i want the ciphertext to be a string only digit string
please reply as soon as possible

Hi Hapid, this depends on your context. You could just use the byte values, but that will be a long string. If security is not a priority, you could solve it by some mapping.