(Tcl) Blowfish Encryption to Match PHP's Mcrypt Extension

Demonstrates how to match Blowfish encryption results with PHP's mcrypt extension.

Please refer to this PHP (non-Chilkat) example for PHP Blowfish Encryption. The code here matches the PHP mcrypt results on that web page.

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load ./chilkat.dll

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

set crypt [new_CkCrypt2]

# Use "blowfish2" to get proper results:
CkCrypt2_put_CryptAlgorithm $crypt "blowfish2"

# CipherMode may be "ecb" or "cbc"
CkCrypt2_put_CipherMode $crypt "cbc"

# KeyLength (in bits) may be a number between 32 and 448.
# 128-bits is usually sufficient.  The KeyLength must be a 
# multiple of 8.
CkCrypt2_put_KeyLength $crypt 256

# Pad with NULL bytes (PHP pads with NULL bytes)
CkCrypt2_put_PaddingScheme $crypt 3

# EncodingMode specifies the encoding of the output for
# encryption, and the input for decryption.
# It may be "hex", "url", "base64", or "quoted-printable".
CkCrypt2_put_EncodingMode $crypt "hex"

# The blowfish algorithm uses a 64-bit block size, 
# therefore the IV must be 8 bytes:
set ivAscii "12345678"
CkCrypt2_SetEncodedIV $crypt $ivAscii "ascii"

# For 256-bit encryption, the key is 32 bytes:
set keyAscii "1234567890123456ABCDEFGHIJKLMNOP"
CkCrypt2_SetEncodedKey $crypt $keyAscii "ascii"

set plainText "The quick brown fox jumped over the lazy dog"

set cipherText [CkCrypt2_encryptStringENC $crypt $plainText]
puts "$cipherText"
# Output should be (case insensitive):
# 276855ca6c0d60f7d9708210440c1072e05d078e733b34b4198d609dc2fcc2f0c30926cdef3b6d52baf6e345aa03f83e

# Do 128-bit Blowfish encryption:
CkCrypt2_put_KeyLength $crypt 128
set keyAscii "1234567890123456"
CkCrypt2_SetEncodedKey $crypt $keyAscii "ascii"

set cipherText [CkCrypt2_encryptStringENC $crypt $plainText]
puts "$cipherText"
# Output should be (case insensitive):
# d2b5abb73208aea3790621d028afcc74d8dd65fb9ea8e666444a72523f5ecca60df79a424e2c714fa6efbafcc40bdca

delete_CkCrypt2 $crypt