es（the advanced encryption standard）是美国国家标准与技术研究所用于加密电子数据的规范。它被预期能成为人们公认的加密包括金融、电信和政府数字信息的方法。
本文实例为大家介绍c#实现对aes加密解密的详细代码，分享给大家供大家参考，具体内容如下
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using system;
using system.collections.generic;
using system.linq;
using system.text;
using system.security.cryptography;
using system.io;
namespace aesdemo
{
public static class aeshelper
{
/// <summary>
/// aes加密
/// </summary>
/// <param name="data">被加密的明文</param>
/// <param name="key">密钥</param>
/// <param name="vector">向量</param>
/// <returns>密文</returns>
public static byte[] aesencrypt(byte[] data, string key, string vector)
{
byte[] bkey = new byte[32];
array.copy(encoding.utf8.getbytes(key.padright(bkey.length)), bkey, bkey.length);
byte[] bvector = new byte[16];
array.copy(encoding.utf8.getbytes(vector.padright(bvector.length)), bvector, bvector.length);
byte[] cryptograph = null; // 加密后的密文
rijndael aes = rijndael.create();
try
{
// 开辟一块内存流
using (memorystream memory = new memorystream())
{
// 把内存流对象包装成加密流对象
using (cryptostream encryptor = new cryptostream(memory,
aes.createencryptor(bkey, bvector),
cryptostreammode.write))
{
// 明文数据写入加密流
encryptor.write(data, 0, data.length);
encryptor.flushfinalblock();
cryptograph = memory.toarray();
}
}
}
catch
{
cryptograph = null;
}
return cryptograph;
}
/// <summary>
/// aes解密
/// </summary>
/// <param name="data">被解密的密文</param>
/// <param name="key">密钥</param>
/// <param name="vector">向量</param>
/// <returns>明文</returns>
public static byte[] aesdecrypt(byte[] data, string key, string vector)
{
byte[] bkey = new byte[32];
array.copy(encoding.utf8.getbytes(key.padright(bkey.length)), bkey, bkey.length);
byte[] bvector = new byte[16];
array.copy(encoding.utf8.getbytes(vector.padright(bvector.length)), bvector, bvector.length);
byte[] original = null; // 解密后的明文
rijndael aes = rijndael.create();
try
{
// 开辟一块内存流，存储密文
using (memorystream memory = new memorystream(data))
{
// 把内存流对象包装成加密流对象
using (cryptostream decryptor = new cryptostream(memory,
aes.createdecryptor(bkey, bvector),
cryptostreammode.read))
{
// 明文存储区
using (memorystream originalmemory = new memorystream())
{
byte[] buffer = new byte[1024];
int32 readbytes = 0;
while ((readbytes = decryptor.read(buffer, 0, buffer.length)) > 0)
{
originalmemory.write(buffer, 0, readbytes);
}
original = originalmemory.toarray();
}
}
}
}
catch
{
original = null;
}
return original;
}
}
}
不使用向量的方式：
public static class aescrypto
{
/// <summary>
/// iv向量为固定值
/// </summary>
//private static byte[] _iv = {
// 85, 60, 12, 116,
// 99, 189, 173, 19,
// 138, 183, 232, 248,
// 82, 232, 200, 242
//};
public static byte[] decrypt(byte[] encryptedbytes, byte[] key)
{
memorystream mstream = new memorystream( encryptedbytes );
//mstream.write( encryptedbytes, 0, encryptedbytes.length );
//mstream.seek( 0, seekorigin.begin );
rijndaelmanaged aes = new rijndaelmanaged( );
aes.mode = ciphermode.ecb;
aes.padding = paddingmode.pkcs7;
aes.keysize = 128;
aes.key = key;
//aes.iv = _iv;
cryptostream cryptostream = new cryptostream( mstream, aes.createdecryptor( ), cryptostreammode.read );
try {
byte[] tmp = new byte[ encryptedbytes.length + 32 ];
int len = cryptostream.read( tmp, 0, encryptedbytes.length + 32 );
byte[] ret = new byte[ len ];
array.copy( tmp, 0, ret, 0, len );
return ret;
}
finally {
cryptostream.close( );
mstream.close( );
aes.clear( );
}
}
public static byte[] encrypt(byte[] plainbytes, byte[] key)
{
memorystream mstream = new memorystream();
rijndaelmanaged aes = new rijndaelmanaged();
aes.mode = ciphermode.ecb;
aes.padding = paddingmode.pkcs7;
aes.keysize = 128;
//aes.key = _key;
aes.key = key;
//aes.iv = _iv;
cryptostream cryptostream = new cryptostream(mstream, aes.createencryptor(), cryptostreammode.write);
try
{
cryptostream.write(plainbytes, 0, plainbytes.length);
cryptostream.flushfinalblock();
return mstream.toarray();
}
finally
{
cryptostream.close();
mstream.close();
aes.clear();
}
}
}
希望通过这篇文章大家对aes加密解密有所了解，对c#程序设计有所帮助。
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