.NET中加密和解密的实现方法 3-.NET教程,安全和优化

//使用客户端的公共密钥加密对称密钥并发送给客。

encryptandsendsymmetrickey(client, rsa, symm);

//使用对称密钥加密信息并发送

encryptandsendsecretmessage(client, symm, msg);

}

catch (exception e)

{

console.writeline(e.message);

console.writeline(e.stacktrace);

}

finally

{

try

{

client.close();

listener.stop();

}

catch

{

//错误

}

console.writeline("server exiting…");

}

}

private static rsaparameters getclientpublickey(tcpclient client)

{

// 从字节流获取串行化的公共密钥，通过串并转换写入类的实例

byte[] buffer = new byte[rsa_key_size_bytes];

networkstream ns = client.getstream();

memorystream ms = new memorystream();

binaryformatter bf = new binaryformatter();

rsaparameters result;

int len = 0;

int totallen = 0;