无法获得RijndaelManaged AES 128 CBC来产生已知结果 [英] Can't get RijndaelManaged AES 128 CBC to produce a known result
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问题描述
我在让RijndaelManaged与AES 128 CBC配合使用时遇到问题.我以前没有使用过RijndaelManaged，所以如果能帮助我，我将不胜感激.我正在尝试产生显示的结果 网页的"AES CBC 128位加密模式"部分.我已经在Java中完成了此操作，但我使用PKCS5作为填充模式，但在RijndaelManaged中不存在.
I''m having problems getting RijndaelManaged to work with AES 128 CBC. I havent used RijndaelManaged before so i would really appreciate if some could help. I''m trying to produce a result shown in this web page, section AES CBC 128-bit encryption mode. I have done it in Java but i used PKCS5 as padding mode but it does not exist in RijndaelManaged.
string hexKey = "2b7e151628aed2a6abf7158809cf4f3c";
string hexIv = "000102030405060708090A0B0C0D0E0F";
string hexText = "6bc1bee22e409f96e93d7e117393172a";
byte[] keyBytes = Encoding.ASCII.GetBytes(HexToAscii(hexKey));
byte[] ivBytes = Encoding.ASCII.GetBytes(HexToAscii(hexIv));
string asciiText = HexToAscii(hexText);
byte[] encryptedBytes = encryptStringToBytes_AES(asciiText, keyBytes, ivBytes);
string encryptedStr = Encoding.ASCII.GetString(encryptedBytes);
string encryptedHex = AsciiToHex(encryptedStr);
// Correct result of encryptedHex should be 7649abac8119b246cee98e9b12e9197d
// but is 7183f203f3f5d3f5c3f3f4e3f33513f3f23673f3f3f3f3f553f3b4533f3f42
//
// This is copy-pase code from http://msdn.microsoft.com/en-us/library/system.security.cryptography.rijndaelmanaged.aspx
public static byte[] encryptStringToBytes_AES(string plainText, byte[] Key, byte[] IV)
{
// Check arguments.
if (plainText == null || plainText.Length <= 0)
throw new ArgumentNullException("plainText");
if (Key == null || Key.Length <= 0)
throw new ArgumentNullException("Key");
if (IV == null || IV.Length <= 0)
throw new ArgumentNullException("IV");
// Declare the stream used to encrypt to an in memory
// array of bytes.
MemoryStream msEncrypt = null;
// Declare the RijndaelManaged object
// used to encrypt the data.
RijndaelManaged aesAlg = null;
try
{
// Create a RijndaelManaged object
// with the specified key and IV.
aesAlg = new RijndaelManaged();
aesAlg.KeySize = 128;
aesAlg.Mode = CipherMode.CBC;
aesAlg.Padding = PaddingMode.PKCS7;
aesAlg.Key = Key;
aesAlg.IV = IV;
// Create an encryptor to perform the stream transform.
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for encryption.
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);
}
}
}
finally
{
// Clear the RijndaelManaged object.
if (aesAlg != null)
aesAlg.Clear();
}
// Return the encrypted bytes from the memory stream.
return msEncrypt.ToArray();
}
public static string AsciiToHex(string ascii)
{
string hex = "";
for (int i = 0; i < ascii.Length; i++)
{
hex += Convert.ToInt32(ascii[i]).ToString("x");
}
return hex;
}
public static string HexToAscii(string hex)
{
string ascii = "";
for (int i = 0; i < hex.Length - 1; i = i + 2)
{
String oneHex = hex.Substring(i, 2);
UInt32 asciiNum = Convert.ToUInt32(oneHex, 16);
char asciiChar = Convert.ToChar(asciiNum);
ascii += asciiChar.ToString();
}
return ascii;
}
推荐答案
嗨
对于您的方法，我不太清楚.但是，除了加密的SALT和PASSWORD外，我还给了Microsoft示例代码.
当您像MessageBox.Show(RijndaelMemoryExample.Test("my test string"))那样调用时；加密然后解密后，它返回相同的输入字符串.
Hi
I am not very clear about your approach. However I am give the microsoft example code in addition with a SALT and PASSWORD to encrypt.
When you call like MessageBox.Show(RijndaelMemoryExample.Test("my test string")); It returns the same input string after encryption and then decryption.
<pre lang="msil">class RijndaelMemoryExample
{
public static string Test(string original)
{
try
{
//Use a salt and password to protect the string
string saltText = "Test salt";
string password = "Test password";
// Create a new instance of the RijndaelManaged
// class. This generates a new key and initialization
// vector (IV).
System.Security.Cryptography.RijndaelManaged myRijndael = new System.Security.Cryptography.RijndaelManaged();
byte[] salt = Encoding.ASCII.GetBytes(saltText);
Rfc2898DeriveBytes rfcKey = new Rfc2898DeriveBytes(password, salt);
myRijndael.Key = rfcKey.GetBytes(myRijndael.KeySize / 8);
myRijndael.IV = rfcKey.GetBytes(myRijndael.BlockSize / 8);
// Encrypt the string to an array of bytes.
byte[] encrypted = encryptStringToBytes_AES(original, myRijndael.Key, myRijndael.IV);
// Decrypt the bytes to a string.
string roundtrip = decryptStringFromBytes_AES(encrypted, myRijndael.Key, myRijndael.IV);
return roundtrip;
}
catch (Exception e)
{
Console.WriteLine("Error: {0}", e.Message);
return "";
}
}
static byte[] encryptStringToBytes_AES(string plainText, byte[] Key, byte[] IV)
{
// Check arguments.
if (plainText == null || plainText.Length <= 0)
throw new ArgumentNullException("plainText");
if (Key == null || Key.Length <= 0)
throw new ArgumentNullException("Key");
if (IV == null || IV.Length <= 0)
throw new ArgumentNullException("IV");
// Declare the stream used to encrypt to an in memory
// array of bytes.
MemoryStream msEncrypt = null;
// Declare the RijndaelManaged object
// used to encrypt the data.
System.Security.Cryptography.RijndaelManaged aesAlg = null;
try
{
// Create a RijndaelManaged object
// with the specified key and IV.
aesAlg = new System.Security.Cryptography.RijndaelManaged();
aesAlg.Key = Key;
aesAlg.IV = IV;
// Create an encryptor to perform the stream transform.
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for encryption.
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);
}
}
}
finally
{
// Clear the RijndaelManaged object.
if (aesAlg != null)
aesAlg.Clear();
}
// Return the encrypted bytes from the memory stream.
return msEncrypt.ToArray();
}
static string decryptStringFromBytes_AES(byte[] cipherText, byte[] Key, byte[] IV)
{
// Check arguments.
if (cipherText == null || cipherText.Length <= 0)
throw new ArgumentNullException("cipherText");
if (Key == null || Key.Length <= 0)
throw new ArgumentNullException("Key");
if (IV == null || IV.Length <= 0)
throw new ArgumentNullException("IV");
// Declare the RijndaelManaged object
// used to decrypt the data.
System.Security.Cryptography.RijndaelManaged aesAlg = null;
// Declare the string used to hold
// the decrypted text.
string plaintext = null;
try
{
// Create a RijndaelManaged object
// with the specified key and IV.
aesAlg = new System.Security.Cryptography.RijndaelManaged();
aesAlg.Key = Key;
aesAlg.IV = IV;
// Create a decrytor to perform the stream transform.
ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for decryption.
using (MemoryStream msDecrypt = new MemoryStream(cipherText))
{
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;
}
}
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