ImageResizer.Plugins.Security.SimpleSecureEncryption Class Reference

Provides correct 256-bit AES encryption and decryption for small data sets. More...

Public Member Functions
	SimpleSecureEncryption (byte[] keyBasis)
	Creates an encryption/decryption system using a 256-bit key derived from the specified byte sequence. 32-bit or longer phrases are suggested. More...
	SimpleSecureEncryption (string passPhrase)
	Creates an encryption/decryption system using a 256-bit key derived from the specified pass phrase. 32-bit or longer phrases are suggested. More...
byte[]	Decrypt (byte[] data, byte[] iv)
	Decrypts the specified data using a derived key and the specified IV More...
byte[]	Encrypt (byte[] data, out byte[] iv)
	Encrypts the specified data using a derived key and a generated IV. More...

Properties
int	KeySizeInBytes [get]
	The number of bytes in the key - defaults to 32 (256-bit AES) More...
int	BlockSizeInBytes [get]
	The number of bytes in a single block. Also the size of the IV (Initialization Vector). More...

Detailed Description

Provides correct 256-bit AES encryption and decryption for small data sets.

Definition at line 13 of file SimpleSecureEncryption.cs.

Constructor & Destructor Documentation

ImageResizer.Plugins.Security.SimpleSecureEncryption.SimpleSecureEncryption ( byte[]  keyBasis )

inline

Creates an encryption/decryption system using a 256-bit key derived from the specified byte sequence. 32-bit or longer phrases are suggested.

Parameters

keyBasis

A password or key

Definition at line 19 of file SimpleSecureEncryption.cs.

                                                       {
            this.keyBasis = keyBasis;
        }

ImageResizer.Plugins.Security.SimpleSecureEncryption.SimpleSecureEncryption ( string  passPhrase )

inline

Creates an encryption/decryption system using a 256-bit key derived from the specified pass phrase. 32-bit or longer phrases are suggested.

Parameters

passPhrase

Definition at line 26 of file SimpleSecureEncryption.cs.

                                                         {
            this.keyBasis = UTF8Encoding.UTF8.GetBytes(passPhrase);
        }

Member Function Documentation

byte [] ImageResizer.Plugins.Security.SimpleSecureEncryption.Decrypt ( byte[]  data, byte[]  iv  )

inline

Decrypts the specified data using a derived key and the specified IV

Parameters

data
iv

Returns

Definition at line 75 of file SimpleSecureEncryption.cs.

                                                      {
            if (iv.Length != BlockSizeInBytes) throw new ArgumentOutOfRangeException("The specified IV is invalid - an " + BlockSizeInBytes + " byte array is required.");

            var rm = GetAlgorithm();
            try {
                using (var decrypt = rm.CreateDecryptor(GetKey(), iv))
                using (var ms = new MemoryStream(data, 0, data.Length, false, true))
                using (var s = new CryptoStream(ms, decrypt, CryptoStreamMode.Read)) {
                    return StreamExtensions.CopyToBytes(s);

                }
            } finally {
                rm.Clear();
            }

        }

byte [] ImageResizer.Plugins.Security.SimpleSecureEncryption.Encrypt ( byte[]  data, out byte[]  iv  )

inline

Encrypts the specified data using a derived key and a generated IV.

Parameters

data
iv

Returns

Definition at line 98 of file SimpleSecureEncryption.cs.

                                                          {
            var rm = GetAlgorithm();
            try {
                rm.GenerateIV();
                iv = rm.IV;
                rm.Key = GetKey();
                using (var encrypt = rm.CreateEncryptor())
                using (var ms = new MemoryStream(data.Length / BlockSizeInBytes)) {
                    using (var s = new CryptoStream(ms, encrypt, CryptoStreamMode.Write)) {
                        s.Write(data, 0, data.Length);
                        s.Flush();
                        s.FlushFinalBlock();
                        ms.Seek(0, SeekOrigin.Begin);
                        return StreamExtensions.CopyToBytes(ms);
                    }
                }
            } finally {
                rm.Clear();
            }
        }

Property Documentation

int ImageResizer.Plugins.Security.SimpleSecureEncryption.BlockSizeInBytes

get

The number of bytes in a single block. Also the size of the IV (Initialization Vector).

Definition at line 47 of file SimpleSecureEncryption.cs.

int ImageResizer.Plugins.Security.SimpleSecureEncryption.KeySizeInBytes

get

The number of bytes in the key - defaults to 32 (256-bit AES)

Definition at line 40 of file SimpleSecureEncryption.cs.

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The documentation for this class was generated from the following file:

• C:/Users/nathanael/Documents/resizer/Plugins/Security/SimpleSecureEncryption.cs