[C#]AES加、解密－Kenny的程式筆記

using System.Security.Cryptography;
using System.Text;

AES解密 :

*注意編碼為utf-8

	/// <summary>
	/// AES解密
	/// </summary>
	/// <param name="text">要解密的字串</param>
	/// <param name="password">KEY值</param>
	/// <param name="iv">IV值</param>
	/// <returns>解密後的字串</returns>
	public static string AESDecrypt(string text, string password, string iv)
	{
	RijndaelManaged rijndaelCipher = new RijndaelManaged();
	rijndaelCipher.Mode = CipherMode.CBC; //設定Mode
	rijndaelCipher.Padding = PaddingMode.PKCS7; //設定Padding
	rijndaelCipher.KeySize = 128;
	rijndaelCipher.BlockSize = 128;

	byte[] encryptedData = Convert.FromBase64String(Encoding.UTF8.GetString(Encoding.UTF8.GetBytes(text)));
	byte[] pwdBytes = Encoding.UTF8.GetBytes(password);
	byte[] keyBytes = new byte[16];
	int len = pwdBytes.Length;

	if (len > keyBytes.Length)
	len = keyBytes.Length;

	Array.Copy(pwdBytes, keyBytes, len);

	rijndaelCipher.Key = keyBytes;

	byte[] ivBytes = Encoding.UTF8.GetBytes(iv);
	rijndaelCipher.IV = ivBytes;

	ICryptoTransform transform = rijndaelCipher.CreateDecryptor();

	byte[] plainText = transform.TransformFinalBlock(encryptedData, 0, encryptedData.Length);

	return Encoding.UTF8.GetString(plainText);
	}

view raw gistfile1.txt hosted with ❤ by GitHub

AES加密 :

*注意編碼為utf-8

	/// <summary>
	/// AES加密
	/// </summary>
	/// <param name="text">要加密的字串</param>
	/// <param name="password">KEY值</param>
	/// <param name="iv">IV值</param>
	/// <returns></returns>
	public static string AESEncrypt(string text, string password, string iv)
	{
	RijndaelManaged rijndaelCipher = new RijndaelManaged();
	rijndaelCipher.Mode = CipherMode.CBC;
	rijndaelCipher.Padding = PaddingMode.PKCS7;
	rijndaelCipher.KeySize = 128;
	rijndaelCipher.BlockSize = 128;
	byte[] pwdBytes = Encoding.UTF8.GetBytes(password);
	byte[] keyBytes = new byte[16];
	int len = pwdBytes.Length;

	if (len > keyBytes.Length)
	len = keyBytes.Length;

	Array.Copy(pwdBytes, keyBytes, len);
	rijndaelCipher.Key = keyBytes;

	byte[] ivBytes = Encoding.UTF8.GetBytes(iv);
	rijndaelCipher.IV = ivBytes;

	ICryptoTransform transform = rijndaelCipher.CreateEncryptor();
	byte[] plainText = Encoding.UTF8.GetBytes(text);
	byte[] cipherBytes = transform.TransformFinalBlock(plainText, 0, plainText.Length);

	return Convert.ToBase64String(cipherBytes);
	}

view raw gistfile1.txt hosted with ❤ by GitHub

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