crypto_x

A Dart library for encryption and decryption. Advanced RSA, AES based on pointycastle.

Features

• RSA with PKCS1 and OAEP encoding.
• Generate RSA KeyPairs and import to pem format.

Getting started

Add the package to your pubspec.yaml:

dependencies:
  crypto_x: <latest_version>

Usage

AES

Supported modes are:

• CBC AESMode.cbc
• CFB-8 AESMode.cfb8
• CFB-128 AESMode.cfb
• CTR AESMode.ctr
• ECB AESMode.ecb
• OFB-128 AESMode.ofb

    final key = CipherKey.fromUtf8('your key................');
    final iv = CipherIV.fromLength(16);
    var aes = AES(key: key, mode: AESMode.cbc);
    CryptoBytes encrypted = aes.encrypt(CryptoBytes.fromUTF8('hello world.'), iv: iv);
    String encryptedBase64 = decrypted.base64;
    CryptoBytes decrypted = aes.decrypt(encrypted, iv: iv);
    String plainText = decrypted.toString();

RSA

• encrypt and decrypt

    var privateRSA = RSA(
        privateKey: privateKey);
    var publicRSA = RSA(
        publicKey: publicKey);
    CryptoBytes signature = publicRSA.encrypt(CryptoBytes.fromUTF8('hello world'));
    String ciphertext = signature.base64;
    CryptoBytes plainBytes = publicRSA.decrypt(signature);
    String plainText = plainBytes.toString();

• sign and verify

    var rsaSigner = RSASigner(digestType = DigestType.sha256, privateKey: privateKey, publicKey: publicKey);
    var plainBytes = CryptoBytes.fromUTF8('hello world');
    CryptoBytes signature = rsaSigner.sign(plainBytes);
    bool isSame = rsaSigner.verify(signature, plainBytes);