任何人都可以帮我解决下面的代码，错误是填充无效且无法删除。我正在搜索所有他们的建议，但仍然填充无效。我正在使用NET-2.0
以下是我的代码
static public String AES_encrypt(String Input)
{
string AES_Key = "PSVJQRk9QTEpNVU1DWUZCRVFGV1VVT0ZOV1RRU1NaWQ=";
string AES_IV = "YWlFLVEZZUFNaWlhPQ01ZT02qWU5HTFJQVFNCRUJZVA=";
var aes = new RijndaelManaged();
aes.KeySize = 256;
aes.BlockSize = 256;
aes.Padding = PaddingMode.PKCS7;
aes.Key = Convert.FromBase64String(AES_Key);
aes.IV = Convert.FromBase64String(AES_IV);
var encrypt = aes.CreateEncryptor(aes.Key, aes.IV);
byte[] xBuff = null;
using (var ms = new MemoryStream())
{
using (var cs = new CryptoStream(ms, encrypt, CryptoStreamMode.Write))
{
byte[] xXml = Encoding.UTF8.GetBytes(Input);
cs.Write(xXml, 0, xXml.Length);
}
xBuff = ms.ToArray();
}
String Output = Convert.ToBase64String(xBuff);
return Output;
}
static public String AES_decrypt(String Input)
{
string AES_Key = "PSVJQRk9QTEpNVU1DWUZCrOFGV1VVT0ZOV1RRU1NaWQ=";
string AES_IV = "YWlFLVEZZUFNaWlhPQ01ZT02qWU5HTFJQVFNCRUJZVA=";
RijndaelManaged aes = new RijndaelManaged();
aes.KeySize = 256;
aes.BlockSize = 256;
aes.Mode = CipherMode.CBC;
aes.Padding = PaddingMode.PKCS7;
aes.Key = Convert.FromBase64String(AES_Key);
aes.IV = Convert.FromBase64String(AES_IV);
var decrypt = aes.CreateDecryptor();
byte[] xBuff = null;
using (var ms = new MemoryStream())
{
using (var cs = new CryptoStream(ms, decrypt, CryptoStreamMode.Write))
{
byte[] xXml = Convert.FromBase64String(Input);
cs.Write(xXml, 0, xXml.Length);
}
xBuff = ms.ToArray();
}
String Output = Encoding.UTF8.GetString(xBuff);
return Output;
}
我认为这里的问题是AES_encrypt，因为如果我将加密的字符串从PHP传递到我的项目，AES_decrypt将成功解密它。但是，每当我使用AES_encrypt时，AES_decrypt都会抛出错误。
非常感谢任何帮助。
答案 0 :(得分：1)
Mahr - 正如帕特里克所指出的那样，我应该花时间来解释我原来所做的改变。
首先，你的解密器是在没有任何参数的情况下创建的。因此它不理解使用的ciperkey 其次是关键＆amp; IV是以字节为单位，因此在传入密钥大小之前必须除以8
我还添加了一些额外内容以防止进一步的问题 1：完成后，必须清除RijndaelManaged对象 2：我简化了字符串转换，使其更清晰一些 3：这只是因为我喜欢它们我已经创建了方法作为扩展方法以便于使用。
这应该有用..
private static byte[] _salt = Encoding.ASCII.GetBytes("o6806642kbM7c5");
/// <summary>
/// Encrypt the given string using AES. The string can be decrypted using
/// DecryptStringAES(). The sharedSecret parameters must match.
/// </summary>
/// <param name="plainText">The text to encrypt.</param>
/// <param name="sharedSecret">A password used to generate a key for encryption.</param>
public static string EncryptStringAES(this string plainText)
{
string sharedSecret = "abcd";
if (string.IsNullOrEmpty(plainText))
throw new ArgumentNullException("plainText");
if (string.IsNullOrEmpty(sharedSecret))
throw new ArgumentNullException("sharedSecret");
string outStr = null; // Encrypted string to return
RijndaelManaged aesAlg = null; // RijndaelManaged object used to encrypt the data.
try
{
// generate the key from the shared secret and the salt
Rfc2898DeriveBytes key = new Rfc2898DeriveBytes(sharedSecret, _salt);
// Create a RijndaelManaged object
// with the specified key and IV.
aesAlg = new RijndaelManaged();
aesAlg.Key = key.GetBytes(aesAlg.KeySize / 8);
aesAlg.IV = key.GetBytes(aesAlg.BlockSize / 8);
// Create a decrytor to perform the stream transform.
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for encryption.
using (MemoryStream msEncrypt = new MemoryStream())
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
{
//Write all data to the stream.
swEncrypt.Write(plainText);
}
}
outStr = Convert.ToBase64String(msEncrypt.ToArray());
}
}
finally
{
// Clear the RijndaelManaged object.
if (aesAlg != null)
aesAlg.Clear();
}
// Return the encrypted bytes from the memory stream.
return outStr;
}
/// <summary>
/// Decrypt the given string. Assumes the string was encrypted using
/// EncryptStringAES(), using an identical sharedSecret.
/// </summary>
/// <param name="cipherText">The text to decrypt.</param>
/// <param name="sharedSecret">A password used to generate a key for decryption.</param>
public static string DecryptStringAES(this string cipherText)
{
string sharedSecret = "abcd";
if (string.IsNullOrEmpty(cipherText))
throw new ArgumentNullException("cipherText");
if (string.IsNullOrEmpty(sharedSecret))
throw new ArgumentNullException("sharedSecret");
// Declare the RijndaelManaged object
// used to decrypt the data.
RijndaelManaged aesAlg = null;
// Declare the string used to hold
// the decrypted text.
string plaintext = null;
try
{
// generate the key from the shared secret and the salt
Rfc2898DeriveBytes key = new Rfc2898DeriveBytes(sharedSecret, _salt);
// Create a RijndaelManaged object
// with the specified key and IV.
aesAlg = new RijndaelManaged();
aesAlg.Key = key.GetBytes(aesAlg.KeySize / 8);
aesAlg.IV = key.GetBytes(aesAlg.BlockSize / 8);
// Create a decrytor to perform the stream transform.
ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for decryption.
byte[] bytes = Convert.FromBase64String(cipherText);
using (MemoryStream msDecrypt = new MemoryStream(bytes))
{
using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (StreamReader srDecrypt = new StreamReader(csDecrypt))
// Read the decrypted bytes from the decrypting stream
// and place them in a string.
plaintext = srDecrypt.ReadToEnd();
}
}
}
finally
{
// Clear the RijndaelManaged object.
if (aesAlg != null)
aesAlg.Clear();
}
return plaintext;
}