using System; namespace Encrypt { public class AESHelper { /// <summary> /// 默认密钥-密钥的长度必须是32 /// </summary> private const string PublicKey = "1234567890123456"; /// <summary> /// 默认向量 /// </summary> private const string Iv = "abcdefghijklmnop"; /// <summary> /// AES加密 /// </summary> /// <param name="str">需要加密字符串</param> /// <returns>加密后字符串</returns> public static String Encrypt(string str) { return Encrypt(str, PublicKey); } /// <summary> /// AES解密 /// </summary> /// <param name="str">需要解密字符串</param> /// <returns>解密后字符串</returns> public static String Decrypt(string str) { return Decrypt(str, PublicKey); } /// <summary> /// AES加密 /// </summary> /// <param name="str">需要加密的字符串</param> /// <param name="key">32位密钥</param> /// <returns>加密后的字符串</returns> public static string Encrypt(string str, string key) { Byte[] keyArray = System.Text.Encoding.UTF8.GetBytes(key); Byte[] toEncryptArray = System.Text.Encoding.UTF8.GetBytes(str); var rijndael = new System.Security.Cryptography.RijndaelManaged(); rijndael.Key = keyArray; rijndael.Mode = System.Security.Cryptography.CipherMode.ECB; rijndael.Padding = System.Security.Cryptography.PaddingMode.PKCS7; rijndael.IV = System.Text.Encoding.UTF8.GetBytes(Iv); System.Security.Cryptography.ICryptoTransform cTransform = rijndael.CreateEncryptor(); Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length); return Convert.ToBase64String(resultArray, 0, resultArray.Length); } /// <summary> /// AES解密 /// </summary> /// <param name="str">需要解密的字符串</param> /// <param name="key">32位密钥</param> /// <returns>解密后的字符串</returns> public static string Decrypt(string str, string key) { Byte[] keyArray = System.Text.Encoding.UTF8.GetBytes(key); Byte[] toEncryptArray = Convert.FromBase64String(str); var rijndael = new System.Security.Cryptography.RijndaelManaged(); rijndael.Key = keyArray; rijndael.Mode = System.Security.Cryptography.CipherMode.ECB; rijndael.Padding = System.Security.Cryptography.PaddingMode.PKCS7; rijndael.IV = System.Text.Encoding.UTF8.GetBytes(Iv); System.Security.Cryptography.ICryptoTransform cTransform = rijndael.CreateDecryptor(); Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length); return System.Text.Encoding.UTF8.GetString(resultArray); } } }