使用PCLCrypto加密字符串

Question

我有一个RSA密钥，我从服务提供商处获得。我只想使用PCLCrypto库使用该RSA密钥加密字符串数据。我不想使用PCLCrypto创建RSA密钥。我只想加密数据。 （我正在开发xamarin中的PCL组件。）

Answer 1

关注documentation for AES encryption并修改RSA。使用AsymmetricAlgorithm.RsaPkcs1作为算法提供程序。

以下示例适用于AES。

byte[] keyMaterial;
byte[] data;
var provider = WinRTCrypto.SymmetricKeyAlgorithmProvider.OpenAlgorithm(SymmetricAlgorithm.AesCbcPkcs7);
var key = provider.CreateSymmetricKey(keyMaterial);

// The IV may be null, but supplying a random IV increases security.
// The IV is not a secret like the key is.
// You can transmit the IV (w/o encryption) alongside the ciphertext.
var iv = WinRTCrypto.CryptographicBuffer.GenerateRandom(provider.BlockLength);

byte[] cipherText = WinRTCrypto.CryptographicEngine.Encrypt(key, data, iv);

// When decrypting, use the same IV that was passed to encrypt.
byte[] plainText = WinRTCrypto.CryptographicEngine.Decrypt(key, cipherText, iv);