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WP8.1 RSA 加解密实例(导入公钥私钥)

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因项目上需要用到,之前在WP8.0的环境上调试通过,现在在开发8.1时发现已不支持原来的加密库,所以无法使用以前的方法,不得已,去寻找windows命名空间下RSA的加解密方法,经过几天的尝试,将解决方案贴出来,看能否帮助碰到如此类型的问题的同学.

本示例的应且场景,服务器端返回RSA的公钥私钥,客户端导入公钥及私钥

服务端:

System.Security.Cryptography.RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();

rsa.FromXmlString(xmlPrivatelKey);//此处为XML格式的私钥,如

//<RSAKeyValue><Modulus>.........Mk=</Modulus><Exponent>AQAB</Exponent><P>....../.....LGAAE=</D></RSAKeyValue>

byte[] data1 = rsa.ExportCspBlob(false); byte[] data2 = rsa.ExportCspBlob(true);

String pubkey = System.Convert.ToBase64String(data1);

string privKey = System.Convert.ToBase64String(data2);

WP8.1:

public static byte[] Encrypt(byte[] data, string publicKey)

{

IBuffer buffer = WindowsRuntimeBufferExtensions.AsBuffer(data, 0, data.Length);

AsymmetricKeyAlgorithmProvider asymmetricAlgorithm = AsymmetricKeyAlgorithmProvider.OpenAlgorithm("RSA_PKCS1");

try

{

// 根据算法名称实例化一个非对称算法提供程序

CryptographicKey key = asymmetricAlgorithm.ImportPublicKey(CryptographicBuffer.DecodeFromBase64String(publicKey), CryptographicPublicKeyBlobType.Capi1PublicKey);

IBuffer encrypted = CryptographicEngine.Encrypt(key, buffer, null);

// 加密后的结果

return encrypted.ToArray();

}

catch (Exception er)

{

return new byte[0];

}

}

public static byte[] Decrypt(byte[] data, string publicKey, string privateKey)

{

IBuffer buffer = WindowsRuntimeBufferExtensions.AsBuffer(data, 0, data.Length);

// 根据算法名称实例化一个非对称算法提供程序

AsymmetricKeyAlgorithmProvider asymmetricAlgorithm = AsymmetricKeyAlgorithmProvider.OpenAlgorithm(AsymmetricAlgorithmNames.RsaPkcs1);

try

{

CryptographicKey pubkey = asymmetricAlgorithm.ImportPublicKey(CryptographicBuffer.DecodeFromBase64String(publicKey), CryptographicPublicKeyBlobType.Capi1PublicKey);

// 导入公钥私钥对

CryptographicKey keyPair2 = asymmetricAlgorithm.ImportKeyPair(CryptographicBuffer.DecodeFromBase64String(privateKey), CryptographicPrivateKeyBlobType.Capi1PrivateKey);

// 解密数据(通过私钥)

IBuffer decrypted = CryptographicEngine.Decrypt(keyPair2, buffer, null);

return decrypted.ToArray();

}

catch (Exception er)

{

return new byte[0];

}


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