我正在尝试使用256byte密钥转换以前处理AES加密的工作脚本。我试图让脚本使用128bye，但我得到的填充无效，并且无法在第110行删除错误。任何帮助或提示都会有所帮助。
我尝试过使用keySize或块大小但尚未开始工作。
这是代码。
using System;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
// Response.Write(timeNow.ToString());
string str = @"{""dataset"":{""schema"" :{""manifest"":{""datasetname"":""/Apps/SM/Custom/Shoppers/ShopperMailbox_GetAssignedInstances"",""datafieldsmode"":""D"",""dbsqltype"":""P"",""schemaformat"":""JSON"",""dataformat"":""json"",""encoding"":""utf-8"",""security"":{},""cacheable"":{},""hasoutputparameters"":false,""meta"":{}},""parameters"":[{""name"":""SecurityObjectUserID"",""heading"":""SecurityObjectUserID"",""headingglobalizationenabled"":true,""sqlparamname"":""@SecurityObjectUserID"",""datatype"":""bigint"",""datatypecharlength"":null,""datatypenumericprecision"":19,""datatypenumericprecisionradix"":10,""datatypenumericscale"":0,""datatypedatetimeprecision"":null,""allownulls"":true,""defaultvalue"":null,""controlvisual"":{},""validator"":{},""ordinalposition"":1,""direction"":null,""lookup"":null},{""name"":""ShopperPhoneNumber"",""heading"":""ShopperPhoneNumber"",""headingglobalizationenabled"":true,""sqlparamname"":""@ShopperPhoneNumber"",""datatype"":""varchar"",""datatypecharlength"":63,""datatypenumericprecision"":null,""datatypenumericprecisionradix"":null,""datatypenumericscale"":null,""datatypedatetimeprecision"":null,""allownulls"":true,""defaultvalue"":null,""controlvisual"":{},""validator"":{},""ordinalposition"":2,""direction"":null,""lookup"":null},{""name"":""ShopperEmailAddress"",""heading"":""ShopperEmailAddress"",""headingglobalizationenabled"":true,""sqlparamname"":""@ShopperEmailAddress"",""datatype"":""nvarchar"",""datatypecharlength"":222,""datatypenumericprecision"":null,""datatypenumericprecisionradix"":null,""datatypenumericscale"":null,""datatypedatetimeprecision"":null,""allownulls"":true,""defaultvalue"":null,""controlvisual"":{},""validator"":{},""ordinalposition"":3,""direction"":null,""lookup"":null},{""name"":""MiscSettings"",""heading"":""MiscSettings"",""headingglobalizationenabled"":true,""sqlparamname"":""@MiscSettings"",""datatype"":""nvarchar"",""datatypecharlength"":-1,""datatypenumericprecision"":null,""datatypenumericprecisionradix"":null,""datatypenumericscale"":null,""datatypedatetimeprecision"":null,""allownulls"":true,""defaultvalue"":null,""controlvisual"":{},""validator"":{},""ordinalposition"":4,""direction"":null,""lookup"":null}],""columns"":[{""name"":""Shopper Email Address"",""heading"":""Shopper Email Address"",""headingglobalizationenabled"":true,""sqlparamname"":null,""datatype"":""nvarchar"",""datatypecharlength"":222,""datatypenumericprecision"":null,""datatypenumericprecisionradix"":null,""datatypenumericscale"":null,""datatypedatetimeprecision"":null,""allownulls"":true,""defaultvalue"":null,""controlvisual"":{},""validator"":{},""ordinalposition"":0,""direction"":null,""lookup"":null},{""name"":""Instance ID"",""heading"":""Instance ID"",""headingglobalizationenabled"":true,""sqlparamname"":null,""datatype"":""bigint"",""datatypecharlength"":null,""datatypenumericprecision"":null,""datatypenumericprecisionradix"":null,""datatypenumericscale"":null,""datatypedatetimeprecision"":null,""allownulls"":true,""defaultvalue"":null,""controlvisual"":{},""validator"":{},""ordinalposition"":1,""direction"":null,""lookup"":null},{""name"":""Location Street Address"",""heading"":""Location Street 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Name"",""headingglobalizationenabled"":true,""sqlparamname"":null,""datatype"":""nvarchar"",""datatypecharlength"":200,""datatypenumericprecision"":null,""datatypenumericprecisionradix"":null,""datatypenumericscale"":null,""datatypedatetimeprecision"":null,""allownulls"":true,""defaultvalue"":null,""controlvisual"":{},""validator"":{},""ordinalposition"":6,""direction"":null,""lookup"":null},{""name"":""Survey Title"",""heading"":""Survey Title"",""headingglobalizationenabled"":true,""sqlparamname"":null,""datatype"":""nvarchar"",""datatypecharlength"":500,""datatypenumericprecision"":null,""datatypenumericprecisionradix"":null,""datatypenumericscale"":null,""datatypedatetimeprecision"":null,""allownulls"":true,""defaultvalue"":null,""controlvisual"":{},""validator"":{},""ordinalposition"":7,""direction"":null,""lookup"":null},{""name"":""Planned Date"",""heading"":""Planned Date"",""headingglobalizationenabled"":true,""sqlparamname"":null,""datatype"":""date"",""datatypecharlength"":null,""datatypenumericprecision"":null,""datatypenumericprecisionradix"":null,""datatypenumericscale"":null,""datatypedatetimeprecision"":null,""allownulls"":true,""defaultvalue"":null,""controlvisual"":{},""validator"":{},""ordinalposition"":8,""direction"":null,""lookup"":null},{""name"":""Due Date"",""heading"":""Due Date"",""headingglobalizationenabled"":true,""sqlparamname"":null,""datatype"":""datetime"",""datatypecharlength"":null,""datatypenumericprecision"":null,""datatypenumericprecisionradix"":null,""datatypenumericscale"":null,""datatypedatetimeprecision"":null,""allownulls"":true,""defaultvalue"":null,""controlvisual"":{},""validator"":{},""ordinalposition"":9,""direction"":null,""lookup"":null},{""name"":""Campaign"",""heading"":""Campaign"",""headingglobalizationenabled"":true,""sqlparamname"":null,""datatype"":""nvarchar"",""datatypecharlength"":50,""datatypenumericprecision"":null,""datatypenumericprecisionradix"":null,""datatypenumericscale"":null,""datatypedatetimeprecision"":null,""allownulls"":true,""defaultvalue"":null,""controlvisual"":{},""validator"":{},""ordinalposition"":10,""direction"":null,""lookup"":null}]},""data"":[{""Shopper Email Address"":""frecklegami8@gmail.com"",""Instance ID"":416722,""Location Street Address"":""2700 Potomac Mills Circle"",""Location City"":""Woodbridge"",""Location State"":""VA"",""Location Postal Code"":""22192"",""Client Name"":""Christmas Tree Shops "",""Survey Title"":""CTS In Store Mystery Shop"",""Planned Date"":null,""Due Date"":""2018-01-17 00:59:00"",""Campaign"":""2018-01""},{""Shopper Email Address"":""frecklegami8@gmail.com"",""Instance ID"":418529,""Location Street Address"":""4830 Crossings Court"",""Location City"":""Massaponax"",""Location State"":""VA"",""Location Postal Code"":""22407"",""Client Name"":""Steak 'N Shake - Virginia"",""Survey Title"":""Steak 'N Shake Dine In Evaluation v2"",""Planned Date"":null,""Due Date"":""2018-01-20 23:59:00"",""Campaign"":""2018-01""}]}}";
string encryptedString = AESEncryption.Encrypt(str, "ds!5da%-0sadg$!$2fDUC-51AHB)!"); //, "ASDdasdsa213DSA#4!#@!#@dsadsa", "SHA512", 10000, IV);
Response.Write(encryptedString);
//Response.Write("<br/>");
//Response.Write("<br/>");
//Response.Write("<br/>");
//Response.Write("<br/>");
encryptedString = @"dFmyMsfNxzWqVqfYG14ueWRrxA2EezLcatVo9127uRpFZEnYepm9yXv2SQpD+UtX5Fuag9mpJrQL1I0QX7KSGp87TrEH0y6PXlLsjbXSO8hIv0XybmaxAS0/xKmkCdxz";
Response.Write(AESEncryption.Decrypt(encryptedString, "ds!5da%-0sadg$!$2fDUC-51AHB)!")); //, "ASDdasdsa213DSA#4!#@!#@dsadsa", "SHA512", 10000, IV));
}
}
public static class AESEncryption
{
#region Static Functions
// This constant is used to determine the keysize of the encryption algorithm in bits.
// We divide this by 8 within the code below to get the equivalent number of bytes.
private const int Keysize = 128;
// This constant determines the number of iterations for the password bytes generation function.
private const int DerivationIterations = 100000;
public static string Encrypt(string plainText, string passPhrase)
{
// Salt and IV is randomly generated each time, but is preprended to encrypted cipher text
// so that the same Salt and IV values can be used when decrypting.
var saltStringBytes = Generate256BitsOfRandomEntropy();
var ivStringBytes = Generate256BitsOfRandomEntropy();
var plainTextBytes = Encoding.UTF8.GetBytes(plainText);
using (var password = new Rfc2898DeriveBytes(passPhrase, saltStringBytes, DerivationIterations))
{
var keyBytes = password.GetBytes(Keysize / 8);
using (var symmetricKey = new RijndaelManaged())
{
symmetricKey.BlockSize = 128;
symmetricKey.Mode = CipherMode.CBC;
symmetricKey.Padding = PaddingMode.PKCS7;
using (var encryptor = symmetricKey.CreateEncryptor(keyBytes, ivStringBytes))
{
using (var memoryStream = new MemoryStream())
{
using (var cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
{
cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
cryptoStream.FlushFinalBlock();
// Create the final bytes as a concatenation of the random salt bytes, the random iv bytes and the cipher bytes.
var cipherTextBytes = saltStringBytes;
cipherTextBytes = cipherTextBytes.Concat(ivStringBytes).ToArray();
cipherTextBytes = cipherTextBytes.Concat(memoryStream.ToArray()).ToArray();
memoryStream.Close();
cryptoStream.Close();
return Convert.ToBase64String(cipherTextBytes);
}
}
}
}
}
}
public static string Decrypt(string cipherText, string passPhrase)
{
// Get the complete stream of bytes that represent:
// [32 bytes of Salt] + [32 bytes of IV] + [n bytes of CipherText]
if (String.IsNullOrEmpty(cipherText))
{
return "Empty string";
}
if (!IsBase64String(cipherText))
{
return "Not a valid Base64 string";
}
var cipherTextBytesWithSaltAndIv = Convert.FromBase64String(cipherText);
// Get the saltbytes by extracting the first 16 bytes from the supplied cipherText bytes.
var saltStringBytes = cipherTextBytesWithSaltAndIv.Take(Keysize / 8).ToArray();
// Get the IV bytes by extracting the next 16 bytes from the supplied cipherText bytes.
var ivStringBytes = cipherTextBytesWithSaltAndIv.Skip(Keysize / 8).Take(Keysize / 8).ToArray();
// Get the actual cipher text bytes by removing the first 64 bytes from the cipherText string.
var cipherTextBytes = cipherTextBytesWithSaltAndIv.Skip((Keysize / 8) * 2).Take(cipherTextBytesWithSaltAndIv.Length - ((Keysize / 8) * 5)).ToArray();
using (var password = new Rfc2898DeriveBytes(passPhrase, saltStringBytes, DerivationIterations))
{
var keyBytes = password.GetBytes(Keysize / 8);
using (var symmetricKey = new RijndaelManaged())
{
symmetricKey.BlockSize = 128;
symmetricKey.Mode = CipherMode.CBC;
symmetricKey.Padding = PaddingMode.PKCS7;
using (var decryptor = symmetricKey.CreateDecryptor(keyBytes, ivStringBytes))
{
using (var memoryStream = new MemoryStream(cipherTextBytes))
{
using (var cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read))
{
var plainTextBytes = new byte[cipherTextBytes.Length];
var decryptedByteCount = cryptoStream.Read(plainTextBytes, 0, plainTextBytes.Length);
memoryStream.Close();
cryptoStream.Close();
return Encoding.UTF8.GetString(plainTextBytes, 0, decryptedByteCount);
}
}
}
}
}
}
private static byte[] Generate256BitsOfRandomEntropy()
{
var randomBytes = new byte[16]; // 16 Bytes will give us 128 bits.
using (var rngCsp = new RNGCryptoServiceProvider())
{
// Fill the array with cryptographically secure random bytes.
rngCsp.GetBytes(randomBytes);
}
return randomBytes;
}
private static bool IsBase64String(string value)
{
if (string.IsNullOrEmpty(value))
{
return false;
}
// if(value == null || value.Length == 0 || value.Length % 4 != 0 || value.Contains(" ") || value.Contains("\t") || value.Contains("\r") || value.Contains("\n"))
// {
// return false;
// }
try
{
Convert.FromBase64String(value);
return true;
//if (value.EndsWith("="))
//{
// value = value.Trim();
// int mod4 = value.Length % 4;
// if (mod4 != 0)
// {
// return false;
// }
// return true;
//}
//else
//{
// return false;
//}
}
catch (FormatException)
{
return false;
}
}
public static string Left(this string value, int maxLength)
{
if (string.IsNullOrEmpty(value)) return value;
maxLength = Math.Abs(maxLength);
return (value.Length <= maxLength
? value
: value.Substring(0, maxLength)
);
}
#endregion
}
答案 0 :(得分：2)
你有这一行的错误：
var cipherTextBytes = cipherTextBytesWithSaltAndIv.Skip((Keysize / 8) * 2).Take(cipherTextBytesWithSaltAndIv.Length - ((Keysize / 8) * 5)).ToArray();
为什么只采用cipherTextBytesWithSaltAndIv.Length - ((Keysize / 8) * 5)个字节？正如我在加密算法中看到的那样，在去除盐和IV后剩余的所有字节都应该被采用。
即。用
替换该行var cipherTextBytes = cipherTextBytesWithSaltAndIv.Skip((Keysize / 8) * 2).ToArray();
并且解密将正常工作。
UPD：删除您的硬编码encodedString并尝试解密以前生成的字符串。看来您的硬编码字符串是使用不同的算法加密的。