blowfish.reader-encrypt

function

Library: Blowfish (OMFFBLOWFISH)
Import : omffblowfish.xmd

Returns: A scannable input source for streaming data

Declaration

export string source function
      reader-encrypt     from value string source input-data
                     with-key value string encryption-key elsewhere

Purpose

Use reader-encrypt to read a string source, its first argument, and encrypt it using an encryption key, its second argument. The encrypted data is returned as a string source that can be further processed. Note that the Blowfish algorithm processes data in 64-bit chunks. If the length of input-data is not a multiple of 64 bits, it will be padded with null bytes. Similarly, the length of the data generated by reader-encrypt will be a multiple of 64 bits.

Usage Note

To use reader-encrypt, you must import OMFFBLOWFISH.XMD into your program using a statement like this:

     import "omffblowfish.xmd" prefixed by blowfish.

(Please see the import topic for more on importing.)

Example

     import "omffblowfish.xmd" prefixed by blowfish.
  
     process
        local string encryption-key initial { "ENCRYPTION KEY" }
  
        set file "cypher.txt" to blowfish.reader-encrypt from file "clear.txt" with-key encryption-key

Related Topics

Other Library Functions