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。我只想通过使用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

按照documentation for AES encryption并将其修改为RSA。使用AsymmetricAlgorithm.RsaPkcs1作为算法提供者。

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);