Seeking help for encrypt files

[niuhuan]

I'm sorry for my poor knowledge in AES, I tried for a long time but couldn't succeed. I need some help. Thank you.

I wan't encrypt and decrypt files, such as directly reading an input stream or encrypting with an output stream.

I don't know how these nonce are converted, I need some hints, here is my code

use aead::stream::{EncryptorBE32, EncryptorLE31, NewStream, StreamBE32};
use aead::{Aead, Nonce};
use aes_gcm::{Aes256Gcm, KeyInit};


fn encrypt_file_name(file_name: &str, password: &str) -> anyhow::Result<String> {
    let key_bytes = md5::compute(password.as_bytes()).0;
    let key_hex = hex::encode(key_bytes);
    let key = key_hex.as_bytes();
    let nonce_slice = &key_bytes[0..12];
    let cipher = Aes256Gcm::new_from_slice(key)?;
    let nonce = Nonce::<Aes256Gcm>::from_slice(nonce_slice);
    ////////
    let enc = cipher
        .encrypt(nonce, file_name.as_bytes())
        .map_err(|e| anyhow::anyhow!("decrypt file name failed: {}", e))?;
    /////////
    ///// the trait `AeadCore` is not implemented for `StreamBE32<AesGcm<Aes256, UInt<UInt<UInt<UInt<UTerm, B1>, B1>, B0>, B0>>>`
    // let mut encryptor = EncryptorBE32::from_aead(cipher, nonce);
    ////////
    let final_name = base64::prelude::BASE64_URL_SAFE.encode(enc.as_slice());
    Ok(final_name)
}

[niuhuan]

fn encrypt_file_name(file_name: &str, password: &str) -> anyhow::Result<String> {
    let key_bytes = md5::compute(password.as_bytes()).0;
    let key_hex = hex::encode(key_bytes);
    let key = key_hex.as_bytes();
    let nonce_slice = &key_bytes[0..7];
    let cipher = Aes256Gcm::new_from_slice(key)?;
    let encryptor = EncryptorBE32::from_aead(cipher, nonce_slice.into());
    let final_vec = encryptor
        .encrypt_last(file_name.as_bytes())
        .map_err(|e| anyhow::anyhow!("encrypt file name failed: {}", e))?;
    let final_name = base64::prelude::BASE64_URL_SAFE.encode(final_vec.as_slice());
    Ok(final_name)
}

fn decrypt_file_name(file_name: &str, password: &str) -> anyhow::Result<String> {
    let key_bytes = md5::compute(password.as_bytes()).0;
    let key_hex = hex::encode(key_bytes);
    let key = key_hex.as_bytes();
    let nonce_slice = &key_bytes[0..7];
    let cipher = Aes256Gcm::new_from_slice(key)?;
    let encryptor = DecryptorBE32::from_aead(cipher, nonce_slice.into());
    let final_vec = base64::prelude::BASE64_URL_SAFE.decode(file_name.as_bytes())?;
    let final_name = encryptor
        .decrypt_last(final_vec.as_slice())
        .map_err(|e| anyhow::anyhow!("decrypt file name failed: {}", e))?;
    Ok(String::from_utf8(final_name)?)
}