Blowfish Class

Properties Methods Events Configuration Settings Errors

Encrypt and decrypt data with the Blowfish symmetric key block cipher.

Syntax

Blowfish

Remarks

The Blowfish component can be used to encrypt and decrypt data with the Blowfish symmetric key block cipher.

To begin simply specify the data you wish to encrypt or decrypt.

Input and Output Properties

The class will determine the source and destination of the input and output based on which properties are set.

The order in which the input properties are checked is as follows:

When a valid source is found the search stops. The order in which the output properties are checked is as follows:

OutputFile
OutputMessage: The output data is written to this property if no other destination is specified.

Before encrypting you must have a valid Key and IV. There are a few options available to you in regards to key management. The easiest option is to simply set KeyPassword. When KeyPassword is set the component will automatically create a Key and IV using the PKCS5 password digest algorithm. This means there is only one value you need to keep track of.

If you wish to have more control over the Key and IV values you may specify the properties yourself. If IV is left empty, one will be created for you when you call Encrypt or Decrypt.

A simple example:

Component.InputFile = "C:\MyFile.txt";
Component.OutputFile = "C:\Encrypted.txt";
Component.KeyPassword = "password";
Component.Encrypt();

Property List

The following is the full list of the properties of the class with short descriptions. Click on the links for further details.


CipherMode	The cipher mode of operation.
InputFile	The file to process.
InputMessage	The message to process.
IV	The initialization vector (IV).
Key	The secret key for the symmetric algorithm.
KeyPassword	A password to generate the Key and IV .
OutputFile	The output file.
OutputMessage	The output message after processing.
Overwrite	Indicates whether or not the component should overwrite files.
PaddingMode	The padding mode.
UseHex	Whether input or output is hex encoded.

Method List

The following is the full list of the methods of the class with short descriptions. Click on the links for further details.


Config	Sets or retrieves a configuration setting .
Decrypt	Decrypts the data.
DecryptBlock	Decrypts a block and returns the decrypted data.
Encrypt	Encrypts the data.
EncryptBlock	Encrypts data and returns the encrypted block.
Reset	Resets the component.

Event List

The following is the full list of the events fired by the class with short descriptions. Click on the links for further details.


Error	Information about errors during data delivery.
Progress	Fired as progress is made.

Configuration Settings

The following is a list of configuration settings for the class with short descriptions. Click on the links for further details.


KeySize	The size, in bits, of secret key for the symmetric algorithm.
BlockSize	The block size, in bits, of the cryptographic operation.
IncludeIV	Whether to prepend the IV to the output data and read the IV from the input data.
KeyPasswordAlgorithm	The hash algorithm used to derive the Key and IV from the KeyPassword property.
KeyPasswordSalt	The salt value used in conjunction with the KeyPassword to derive the Key and IV.
CodePage	The system code page used for Unicode to Multibyte translations.