RSA encrypt with only public key about encrypt

[TheBosZ]

I think you misunderstood the question.

The question is how to use your library to encrypt a plain text using only the public key.

The RSA class requires both the public and private key, which is fine, except that encryption should only require the public key while decryption should only require the private key.

[leocavalcante]

Oh, sure, right. Now it makes senses.
I'll work on that. Probably the API would look like Encrypter(RSA(publicKey, null));.
Then null checks internally, just in case.

[leocavalcante]

Here we go.

final encrypter = Encrypter(RSA(publicKey: publicKey, privateKey: privateKey));

If you are just encrypting or just decrypting, you can ignore the respective privateKey and publicKey. Trying the encrypt without a public key or decrypt without a private key will throw a StateError.

This was addressed on v2.0. You can use it right now by referencing it on pub:

dependencies:
  kittens:
    git:
      url: git://github.com/leocavalcante/encrypt.git
      ref: v2.0

[TheBosZ]

This works perfectly! I had to dig a little bit to figure out that I needed to construct an Encrypted object using fromBase64, but now it's working as I want it to!

Thanks for a useful utility!

[leocavalcante]

Hm 🤔
The ideia behind RSA is to be asymmetric, a public key for encryption and a private key for decryption.
If you want to use a single key, you should use a symmetric system like AES or Salsa20.

[leocavalcante]

Please, note that v2.0 returns an Encrypted object now on encrypt() method.
You can get the hexdecimal representation using the base16 getter:

print(encrypted.base16);

And there is also a getter for a base64 representation:

print(encrypted.base64);

Or you can do whatever you want with the raw bytes:

print(encrypted.bytes);