cvs commit: ports/security Makefile ports/security/pkcrack Makefile distinfo pkg-descr

[Renato Botelho]

garga       2005-07-28 10:32:17 UTC

  FreeBSD ports repository

  Modified files:
    security             Makefile 
  Added files:
    security/pkcrack     Makefile distinfo pkg-descr 
  Log:
  This package implements an algorithm for breaking the PkZip cipher that was
  devised by Eli Biham and Paul Kocher.
  
  This program applies a known plaintext attack to an encrypted file.
  A known-plaintext-attack recovers a password using the encrypted file and
  (part of) the unencrypted file.
  
  Please note that cryptographers use the word 'plaintext' for any kind of
  unencrypted data - not necessarily readable ASCII text.
  
  Before you ask why somebody may want to know the password when he already knows
  the plaintext think of the following situations:
  
   - Usually there's a large number of files in a ZIP-archive. Usually all these
     files are encrypted using the same password. So if you know one of the files,
     you can recover the password and decrypt the other files.
   - You need to know only a part of the plaintext (at least 13 bytes). Many files
     have commonly known headers, like DOS .EXE-files. Knowing a reasonably long
     header you can recover the password and decrypt the entire file.
  
  WWW: http://www.unix-ag.uni-kl.de/~conrad/krypto/pkcrack.html
  
  PR:             ports/84192
  Submitted by:   Emanuel Haupt <ehaupt at critical.ch>
  
  Revision  Changes    Path
  1.629     +1 -0      ports/security/Makefile
  1.1       +50 -0     ports/security/pkcrack/Makefile (new)
  1.1       +2 -0      ports/security/pkcrack/distinfo (new)
  1.1       +24 -0     ports/security/pkcrack/pkg-descr (new)