C#使用RSA加密解密文件

本文实例为大家分享了C#使用RSA加密解密文件的具体代码,供大家参考,具体内容如下

加密代码:

//加密代码,注意会覆盖原文件,里面有我的公钥,你要用时记得覆盖我的公钥

private bool encryptFile(string filename)

{

FileStream f;

try

{

f = new FileStream(filename, FileMode.Open, FileAccess.ReadWrite, FileShare.Read);

}

catch

{

return false;

}

Random r = new Random();

Thread.Sleep(10*r.Next(3,8));

RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(1024);

rsa.FromXmlString("<RSAKeyValue><Modulus>w7nNT8U7kwTw8UqLk0lROxmfTRZnQrMH1QrNyUGtoeAJ3w+iH08j+h83cPWxwPoxpXm1cgCLFWtCFWY1rkQDCCLxJhUIwYTbGKTg9h0uUVfNxGiNji7dcHShd01UYpZjHCwOar1wjJD4vJqVJCk++59UUMhE9IUATuSUVpRy1bE=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>");

//导入密钥

byte[] data = new byte[16];

ArrayList con = new ArrayList();

while(f.Read(data, 0, 16)!=0)

{

byte[] result = rsa.Encrypt(data,false);

//Thread.Sleep(10 * r.Next(2, 7));

con.Add(result);

}

//加密

f.Seek(0, SeekOrigin.Begin);

foreach(byte[] d in con)

{

f.Write(d, 0, d.Length);

}

f.Close();

return true;

}

解密代码:

//解密代码,覆盖原文件,返回值表示是否解密成功

private bool decryptFile(string filename,string key)

{

FileStream f;

try

{

f = new FileStream(filename, FileMode.Open, FileAccess.ReadWrite, FileShare.Read);

}

catch

{

return false;

}

RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(1024);

try

{

rsa.FromXmlString(key);

}

catch

{

return false;

}

byte[] data = new byte[128];

ArrayList con = new ArrayList();

while (f.Read(data, 0, 128) != 0)

{

byte[] result;

try

{

result = rsa.Decrypt(data, false);

}

catch

{

return false;

}

con.Add(result);

}

//解密

f.SetLength(con.Count * 16);

f.Seek(0, SeekOrigin.Begin);

foreach (byte[] d in con)

{

f.Write(d, 0, d.Length);

}

f.Close();

return true;

}

以上是 C#使用RSA加密解密文件 的全部内容, 来源链接: utcz.com/z/318668.html

回到顶部