./security/hydan, Steganography tool for covert comms, signing and watermarking

[ CVSweb ] [ Homepage ] [ RSS ] [ Required by ] [ Add to tracker ]

Branch: CURRENT, Version: 0.13nb6, Package name: hydan-0.13nb6, Maintainer: pkgsrc-users

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.


Required to run:
[security/openssl]

Required to build:
[pkgtools/cwrappers]

Master sites:

Filesize: 176.181 KB

Version history: (Expand)

CVS history: (Expand)


   2023-10-25 00:11:51 by Thomas Klausner | Files touched by this commit (2298) 
Log message:
*: bump for openssl 3
   2021-10-26 13:18:07 by Nia Alarie | Files touched by this commit (605) 
Log message:
security: Replace RMD160 checksums with BLAKE2s checksums

All checksums have been double-checked against existing RMD160 and
SHA512 hashes

Unfetchable distfiles (fetched conditionally?):
./security/cyrus-sasl/distinfo \ 
cyrus-sasl-dedad73e5e7a75d01a5f3d5a6702ab8ccd2ff40d.patch.v2
   2021-10-07 16:54:50 by Nia Alarie | Files touched by this commit (606) 
Log message:
security: Remove SHA1 hashes for distfiles
   2020-01-18 22:51:16 by Jonathan Perkin | Files touched by this commit (1836) 
Log message:
*: Recursive revision bump for openssl 1.1.1.
   2016-03-05 12:29:49 by Jonathan Perkin | Files touched by this commit (1813) 
Log message:
Bump PKGREVISION for security/openssl ABI bump.
   2015-11-04 02:18:12 by Alistair G. Crooks | Files touched by this commit (434) 
Log message:
Add SHA512 digests for distfiles for security category

Problems found locating distfiles:
	Package f-prot-antivirus6-fs-bin: missing distfile fp-NetBSD.x86.32-fs-6.2.3.tar.gz
	Package f-prot-antivirus6-ws-bin: missing distfile fp-NetBSD.x86.32-ws-6.2.3.tar.gz
	Package libidea: missing distfile libidea-0.8.2b.tar.gz
	Package openssh: missing distfile openssh-7.1p1-hpn-20150822.diff.bz2
	Package uvscan: missing distfile vlp4510e.tar.Z

Otherwise, existing SHA1 digests verified and found to be the same on
the machine holding the existing distfiles (morden).  All existing
SHA1 digests retained for now as an audit trail.
   2015-07-12 09:02:13 by David A. Holland | Files touched by this commit (1) 
Log message:
Relax ONLY_FOR_PLATFORM to *-*-i386. Was limited to NetBSD, FreeBSD, and
Linux but there's no obvious reason in the source and it's just been that
way since the package was first added a long time ago.
   2014-02-13 00:18:57 by Matthias Scheler | Files touched by this commit (1568) 
Log message:
Recursive PKGREVISION bump for OpenSSL API version bump.