DESCR

Hydan steganographically conceals a message into an application. It
exploits redundancy in the i386 instruction set by defining sets of
functionally equivalent instructions. It then encodes information in
machine code by using the appropriate instructions from each set.

Features:
- Application filesize remains unchanged
- Message is blowfish encrypted with a user-supplied
passphrase before being embedded
- Encoding rate: 1/110

Primary uses for Hydan:
- Covert Communication: embedding data into binaries creates a
covert channel that can be used to exchange secret messages.
- Signing: a program's cryptographic signature can be embedded
into itself. The recipient of the binary can then verify
that it has not been tampered with (virus or trojan), and is
really from who it claims to be from. This check can be
built into the OS for user transparency.
- Watermarking: a watermark can be embedded to uniquely
identify binaries for copyright purposes, or as part of a DRM
scheme. Note: this usage is not recommended as Hydan
implements fragile watermarks.

Makefile

# $NetBSD: Makefile,v 1.5 2010/01/17 12:02:40 wiz Exp $

DISTNAME= hydan-0.13
PKGREVISION= 1
CATEGORIES= security
MASTER_SITES= http://crazyboy.com/hydan/

MAINTAINER= pkgsrc-users@NetBSD.org
HOMEPAGE= http://crazyboy.com/hydan/
COMMENT= Steganography tool for covert comms, signing and watermarking

PKG_DESTDIR_SUPPORT= user-destdir

ONLY_FOR_PLATFORM= NetBSD-*-i386 FreeBSD-*-i386 Linux-*-i386

WRKSRC= ${WRKDIR}/hydan

INSTALLATION_DIRS= bin

do-install:
${INSTALL_PROGRAM} ${WRKSRC}/hydan ${DESTDIR}${PREFIX}/bin
cd ${DESTDIR}${PREFIX}/bin && \
${RM} -f hydan-decode hydan-stats && \
${LN} -s hydan hydan-decode && \
${LN} -s hydan hydan-stats
${INSTALL_DATA_DIR} ${DESTDIR}${PREFIX}/share/hydan
${INSTALL_DATA} ${WRKSRC}/README ${DESTDIR}${PREFIX}/share/hydan
${INSTALL_DATA} ${WRKSRC}/README.details ${DESTDIR}${PREFIX}/share/hydan

.include "../../security/openssl/buildlink3.mk"
.include "../../mk/bsd.pkg.mk"

PLIST

@comment $NetBSD: PLIST,v 1.3 2009/06/14 18:13:30 joerg Exp $
bin/hydan
bin/hydan-decode
bin/hydan-stats
share/hydan/README
share/hydan/README.details

distinfo

$NetBSD: distinfo,v 1.3 2005/02/24 13:10:07 agc Exp $

SHA1 (hydan-0.13.tar.gz) = 3c76bf1a1adb36a5124163cbbd55f9aff1afdb6e
RMD160 (hydan-0.13.tar.gz) = eb20dd2087435d77f413fce80b93e1efc256bc1f
Size (hydan-0.13.tar.gz) = 180409 bytes
SHA1 (patch-aa) = 34120bf1202ed25060743a9f9a390ba3c73515f8
SHA1 (patch-ab) = 028a4bb8313b4cf5d016603757865af6bd7f846c
SHA1 (patch-ac) = bb978ce95b03a3887bd8b91b9494c47fbf3e78b7
SHA1 (patch-ad) = 2dcf378abfc6f5509fb91173723fbe073ddc8055