您好,登錄后才能下訂單哦!
本篇內(nèi)容介紹了“C#加解密之AES算法如何實(shí)現(xiàn)”的有關(guān)知識(shí),在實(shí)際案例的操作過(guò)程中,不少人都會(huì)遇到這樣的困境,接下來(lái)就讓小編帶領(lǐng)大家學(xué)習(xí)一下如何處理這些情況吧!希望大家仔細(xì)閱讀,能夠?qū)W有所成!
AES是塊加密,稍微介紹一些AES的參數(shù)以及約束:
Key(密鑰):AES的密鑰長(zhǎng)度必須為128Bit、192Bit、256Bit(一般又都稱為AES128,AES192,AES256),我們一般使用的字母數(shù)字等,占位都是1Byte,根據(jù)換算公式 1 Byte=8 Bit,所以我們的密鑰長(zhǎng)度就只能是16、24、32;
IV(向量):“加密”初始?jí)K,一般為128Bit,即長(zhǎng)度為16,與塊的長(zhǎng)度一樣
Mode(加密模式):可分為CBC(密碼塊鏈模式)、ECB(電子密碼本模式)、OFB(輸出反饋模式)、 CFB(密碼反饋模式)、CTS(密碼文本竊用模式)、CTR(計(jì)數(shù)器模式)
Padding(填充模式):NoPadding(不填充)、PKCS7(每個(gè)字節(jié)填充該字節(jié)序列的長(zhǎng)度)、Zeros(填充0)、ANSIX923(最后一個(gè)字節(jié)填充字節(jié)序列的長(zhǎng)度,其余字節(jié)均填充數(shù)字零)、ISO10126(最后一個(gè)字節(jié)填充字節(jié)序列的長(zhǎng)度,其余字節(jié)填充隨機(jī)數(shù)據(jù))、PKCS5(和PKCS7一樣)
使用AES加密方式加解密文本數(shù)據(jù)
開(kāi)發(fā)工具:Visual Studio 2013
.NET Framework版本:4.5
public class AesUtil { /// <summary> /// AES加密 /// </summary> /// <param name="aesModel"></param> /// <returns></returns> public static byte[] Encrypt(AesModel aesModel) { //使用32位密鑰 byte[] key32 = new byte[32]; //如果我們的密鑰不是32為,則自動(dòng)補(bǔ)全到32位 byte[] byteKey = Encoding.UTF8.GetBytes(aesModel.Key.PadRight(key32.Length)); //復(fù)制密鑰 Array.Copy(byteKey, key32, key32.Length); //使用16位向量 byte[] iv16 = new byte[16]; //如果我們的向量不是16為,則自動(dòng)補(bǔ)全到16位 byte[] byteIv = Encoding.UTF8.GetBytes(aesModel.IV.PadRight(iv16.Length)); //復(fù)制向量 Array.Copy(byteIv, iv16, iv16.Length); // 創(chuàng)建加密對(duì)象,Rijndael 算法 //Rijndael RijndaelAes = Rijndael.Create(); RijndaelManaged RijndaelAes = new RijndaelManaged(); RijndaelAes.Mode = aesModel.Mode; RijndaelAes.Padding = aesModel.Padding; RijndaelAes.Key = key32; RijndaelAes.IV = iv16; byte[] result = null; try { using (MemoryStream ms = new MemoryStream()) { using (CryptoStream EncryptStream = new CryptoStream(ms, RijndaelAes.CreateEncryptor(), CryptoStreamMode.Write)) { EncryptStream.Write(aesModel.Data, 0, aesModel.Data.Length); EncryptStream.FlushFinalBlock(); result = ms.ToArray(); } } } catch { } return result; } /// <summary> /// AES解密 /// </summary> /// <param name="aesModel"></param> /// <returns></returns> public static byte[] Decrypt(AesModel aesModel) { //使用32位密鑰 byte[] key32 = new byte[32]; //如果我們的密鑰不是32為,則自動(dòng)補(bǔ)全到32位 byte[] byteKey = Encoding.UTF8.GetBytes(aesModel.Key.PadRight(key32.Length)); //復(fù)制密鑰 Array.Copy(byteKey, key32, key32.Length); //使用16位向量 byte[] iv16 = new byte[16]; //如果我們的向量不是16為,則自動(dòng)補(bǔ)全到16位 byte[] byteIv = Encoding.UTF8.GetBytes(aesModel.IV.PadRight(iv16.Length)); //復(fù)制向量 Array.Copy(byteIv, iv16, iv16.Length); // 創(chuàng)建解密對(duì)象,Rijndael 算法 //Rijndael RijndaelAes = Rijndael.Create(); RijndaelManaged RijndaelAes = new RijndaelManaged(); RijndaelAes.Mode = aesModel.Mode; RijndaelAes.Padding = aesModel.Padding; RijndaelAes.Key = key32; RijndaelAes.IV = iv16; byte[] result = null; try { using (MemoryStream ms = new MemoryStream(aesModel.Data)) { using (CryptoStream DecryptStream = new CryptoStream(ms, RijndaelAes.CreateDecryptor(), CryptoStreamMode.Read)) { using (MemoryStream msResult = new MemoryStream()) { byte[] temp = new byte[1024*1024]; int len = 0; while ((len = DecryptStream.Read(temp, 0, temp.Length)) > 0) { msResult.Write(temp, 0, len); } result = msResult.ToArray(); } } } } catch { } return result; } /// <summary> /// AES加密字符串 /// </summary> /// <param name="data"></param> /// <param name="key"></param> /// <param name="iv"></param> /// <returns></returns> public static string Encrypt(string data, string key, string iv="") { byte[] bytes = Encoding.UTF8.GetBytes(data); byte[] result = Encrypt(new AesModel { Data = bytes, Key = key, IV = iv, Mode = CipherMode.CBC, Padding = PaddingMode.PKCS7 }); if (result == null) { return ""; } return Convert.ToBase64String(result); } /// <summary> /// AES解密字符串 /// </summary> /// <param name="data"></param> /// <param name="key"></param> /// <param name="iv"></param> /// <returns></returns> public static string Decrypt(string data, string key, string iv = "") { byte[] bytes = Convert.FromBase64String(data); byte[] result = Decrypt(new AesModel { Data = bytes, Key = key, IV = iv, Mode = CipherMode.CBC, Padding = PaddingMode.PKCS7 }); if (result == null) { return ""; } return Encoding.UTF8.GetString(result); } public class AesModel { /// <summary> /// 需要加密/解密的數(shù)據(jù) /// </summary> public byte[] Data { get; set; } /// <summary> /// 密鑰 /// </summary> public string Key { get; set; } /// <summary> /// 向量 /// </summary> public string IV { get; set; } /// <summary> /// 加密模式 /// </summary> public CipherMode Mode { get; set; } /// <summary> /// 填充模式 /// </summary> public PaddingMode Padding { get; set; } } }
private void btn_Aes_Encrypt_Click(object sender, EventArgs e) { string result= AesUtil.Encrypt(textBox1.Text, "12345678900987654321"); textBox2.Text = result; } private void btn_Aes_Decrypt_Click(object sender, EventArgs e) { string result = AesUtil.Decrypt(textBox2.Text, "12345678900987654321"); textBox1.Text = result; }
“C#加解密之AES算法如何實(shí)現(xiàn)”的內(nèi)容就介紹到這里了,感謝大家的閱讀。如果想了解更多行業(yè)相關(guān)的知識(shí)可以關(guān)注億速云網(wǎng)站,小編將為大家輸出更多高質(zhì)量的實(shí)用文章!
免責(zé)聲明:本站發(fā)布的內(nèi)容(圖片、視頻和文字)以原創(chuàng)、轉(zhuǎn)載和分享為主,文章觀點(diǎn)不代表本網(wǎng)站立場(chǎng),如果涉及侵權(quán)請(qǐng)聯(lián)系站長(zhǎng)郵箱:is@yisu.com進(jìn)行舉報(bào),并提供相關(guān)證據(jù),一經(jīng)查實(shí),將立刻刪除涉嫌侵權(quán)內(nèi)容。