About Codex...

Disclaimer:
This software is provided as-is.
The autor disclaims all warranties, express and implied.
Your use of this software constitutes your agreement to these terms.

What is codex?
Codex is a Cocoa checksums calculating and encryption software.
Codex works with text, files and folders.
When encrypting files and folders, Codex preserve MacOS original files forks (data+resource), original dates and attributes and Unix symbolic links.

Checksums of text
Click on the "Text" tabview item , enter text and click the "Update" button.

Checksums of files and folders
Click on the "Files & Folders" tabview item and drag a file or a folder in the icon box.

Checksums of resource forks
MacOSX files are simple data forks but MacOS9 files can contain a resource fork.
Codex treats both forks like an unique data block (datas+resources).
A Codex checksum of forks is not a simple sum of fork checksums.

Checksums of folders
The folder contents is treated like an unique data block.
All the files (and eventualy resource forks) are appended and hashed.
A Codex checksum of folder is not a simple sum of file checksums.

TIGER limitation
The Tiger hash algorithm only works with an unique data block.
Folder checksum and data+resource forks checksum are not supported for this hash algorithm beause the hash result reflects only the last file/fork treated, not the entire datas.

Encrypting text, files or folders
When you encrypt a text, a file or a folder, all the stuff is made in memory.
Codex only writes the result on disk, no temp files are used.
Encryption of a lot of files works better with a lot of RAM.
When you decrypt an encrypted archive (".cea" files), the result is written on disk but w hen you decrypt an encrypted text (".cet" files), the result goes directly in the text area and no ouput file is produced.

Remember that the original key is never included in the encrypted file and the encryption algorithms are military-grade, so:
IT'S IMPOSSIBLE TO DECRYPT A CODEX FILE WITHOUT THE ORIGINAL KEY.
Don't forget your passwords.

The Codex Encryption process
The files and folders are first archived in a single data block and compressed.
The compressed block is encrypted with the cipher mode you have selected using a key witch is the hashed version of the passphrase you type and confirm.
More bits has the hash mode, more secure is the hashed key.
More secure is the hashed key, more secure is the encryption.
A checksum is added to the encrypted block to prevent data corruption and the result is written on disk with the ".cea" file extension.

Is Codex free?
No, Codex is a shareware.
You can use a limited version free for 30 days.
Past this delay a license key is required.
You can purchase a Codex license key ($15) here.

Original location:
http://macmagna.free.fr/

Latest release:
http://macmagna.free.fr/public/Codex.sit

Contacting the autor (suggestions, bugs, ...):
macmagna@free.fr

Versions history:

1.2 (2002-11-18):
- MD2 to TIGER checksum modes for text, with optional HMAC-Key (MD2-SHA1).
- Encryption of text with a new file format: ".cet".
- Confirm alert for folder deletion.

1.1 (2002-11-13):
- ADLER to TIGER checksum modes for folders.
- "Including resource forks" and "Including hidden files" checksums options.
- Encryption of files and folders with a new file format: ".cea".
- ".cdx" format is deprecated but supported.

1.0.2 (2002-11-05):
- MD2 to SHA1 checksum modes for folders.
- MD2 to SHA1 HMAC-hash for files and folders.
- Customisable compression.
- Dump checksums option.

1.0.1 (2002-11-03)
- ADLER to TIGER checksum modes for files.

1.0 (2002-11-01)
- Original Codex software
- 7 checksum modes (MD2 to SHA1) for files.
- 37 cipher modes (Blowfish-CBC to RC5-OFB) for files.
- Compression if wanted.
- Deletion of the original item if wanted.