我想在codeplex上的Portable Class Library Contrib项目中使用密码学，但没有找到任何关于如何使用它的文档。
我想创建一个包装类，在其中添加
然后，我想在.NET、Windows Phone和Metro项目中使用我的包装器。在这些项目中，我引用了我的包装器项目、
然而，当我尝试使用我的包装器类时，出现了冲突的命名空间错误。这是错误和我的包装器类：
类型
我想创建一个包装类，在其中添加
Encrypt和Decrypt方法，并且我希望这个包装类存在于可移植类库中。我已经在此项目中引用了Portable.Runtime和Portable.Security.Cryptography。这样做正确吗？然后，我想在.NET、Windows Phone和Metro项目中使用我的包装器。在这些项目中，我引用了我的包装器项目、
Portable.Runtime、Portable.Security.Cryptography以及相应的可移植项目，即Portable.Desktop、Portable.Phone或Portable.WindowsStore。这样做正确吗？然而，当我尝试使用我的包装器类时，出现了冲突的命名空间错误。这是错误和我的包装器类：
类型
System.Security.Cryptography.AesManaged 在 C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\Profile\Client\System.Core.dll 和 C:\Downloads\PclContrib\bin\Debug\Portable.Security.Cryptography.dll 中都存在。public sealed class SymmetricCryptography<T> where T : SymmetricAlgorithm, new()
{
private readonly T provider = new T();
private readonly UTF8Encoding utf8 = new UTF8Encoding();
private byte[] key;
private byte[] iv;
public byte[] Key
{
get { return this.key; }
}
public byte[] IV
{
get { return this.iv; }
}
public SymmetricCryptography()
{
this.key = this.provider.Key;
this.iv = this.provider.IV;
}
public SymmetricCryptography(byte[] key, byte[] iv)
{
this.key = key;
this.iv = iv;
}
public SymmetricCryptography(string password, string salt)
{
Rfc2898DeriveBytes deriveBytes = new Rfc2898DeriveBytes(password, this.utf8.GetBytes(salt));
this.key = deriveBytes.GetBytes(this.provider.KeySize >> 3);
this.iv = deriveBytes.GetBytes(16);
}
public SymmetricCryptography(string password, string salt, int iterations)
{
Rfc2898DeriveBytes deriveBytes = new Rfc2898DeriveBytes(password, this.utf8.GetBytes(salt), iterations);
this.key = deriveBytes.GetBytes(this.provider.KeySize >> 3);
this.iv = deriveBytes.GetBytes(16);
}
public byte[] Encrypt(byte[] input)
{
return this.Encrypt(input, this.key, this.iv);
}
public byte[] Encrypt(byte[] input, byte[] key, byte[] iv)
{
return this.Transform(
input,
this.provider.CreateEncryptor(key, iv));
}
public byte[] Decrypt(byte[] input)
{
return this.Decrypt(input, this.key, this.iv);
}
public byte[] Decrypt(byte[] input, byte[] key, byte[] iv)
{
return this.Transform(
input,
this.provider.CreateDecryptor(key, iv));
}
public string Encrypt(string text)
{
return this.Encrypt(text, this.key, this.iv);
}
public string Encrypt(string text, byte[] key, byte[] iv)
{
byte[] output = this.Transform(
this.utf8.GetBytes(text),
this.provider.CreateEncryptor(key, iv));
return Convert.ToBase64String(output);
}
public string Decrypt(string text)
{
return this.Decrypt(text, this.key, this.iv);
}
public string Decrypt(string text, byte[] key, byte[] iv)
{
byte[] output = this.Transform(
Convert.FromBase64String(text),
this.provider.CreateDecryptor(key, iv));
return this.utf8.GetString(output, 0, output.Length);
}
public void Encrypt(Stream input, Stream output)
{
this.Encrypt(input, output, this.key, this.iv);
}
public void Encrypt(Stream input, Stream output, byte[] key, byte[] iv)
{
this.TransformStream(true, ref input, ref output, key, iv);
}
public void Decrypt(Stream input, Stream output)
{
this.Decrypt(input, output, this.key, this.iv);
}
public void Decrypt(Stream input, Stream output, byte[] key, byte[] iv)
{
this.TransformStream(false, ref input, ref output, key, iv);
}
private byte[] Transform(
byte[] input,
ICryptoTransform cryptoTransform)
{
byte[] result;
using (MemoryStream memoryStream = new MemoryStream())
{
using (CryptoStream cryptStream = new CryptoStream(
memoryStream,
cryptoTransform,
CryptoStreamMode.Write))
{
cryptStream.Write(input, 0, input.Length);
cryptStream.FlushFinalBlock();
memoryStream.Position = 0;
result = memoryStream.ToArray();
}
}
return result;
}
private void TransformStream(bool encrypt, ref Stream input, ref Stream output, byte[] key, byte[] iv)
{
// defensive argument checking
if (input == null)
{
throw new ArgumentNullException("input");
}
if (output == null)
{
throw new ArgumentNullException("output");
}
if (!input.CanRead)
{
throw new ArgumentException("Unable to read from the input Stream.", "input");
}
if (!output.CanWrite)
{
throw new ArgumentException("Unable to write to the output Stream.", "output");
}
// make the buffer just large enough for
// the portion of the stream to be processed
byte[] inputBuffer = new byte[input.Length - input.Position];
// read the stream into the buffer
input.Read(inputBuffer, 0, inputBuffer.Length);
// transform the buffer
byte[] outputBuffer = encrypt ? Encrypt(inputBuffer, key, iv)
: Decrypt(inputBuffer, key, iv);
// write the transformed buffer to our output stream
output.Write(outputBuffer, 0, outputBuffer.Length);
}
}