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RocketLink!--> Man page versions: OpenBSD FreeBSD Others

MD5(1)                     OpenBSD Reference Manual                     MD5(1)

     md5 - calculate a message-digest fingerprint (checksum) for a file

     md5 [-ptx] [-s string] [file ...]

     md5 takes as input a message of arbitrary length and produces as output a
     128-bit "fingerprint" or "message digest" of the input.  It is conjec-
     tured that it is computationally infeasible to produce two messages hav-
     ing the same message digest, or to produce any message having a given
     prespecified target message digest.  The MD5 algorithm is intended for
     digital signature applications, where a large file must be "compressed"
     in a secure manner before being encrypted with a private (secret) key un-
     der a public-key cryptosystem such as RSA.

     The following four options may be used in any combination and must pre-
     cede any files named on the command line.  The MD5 sum of each file list-
     ed on the command line is printed after the options are processed.

     -s string   Prints a checksum of the given string.

     -p          Echos stdin to stdout and appends the MD5 sum to stdout.

     -t          Runs a built-in time trial.

     -x          Runs a built-in test script.

     cksum(1),  rmd160(1),  sha1(1)

     RFC 1321 describes in detail the MD2, MD4, and MD5 message-digest algo-

     This program is placed in the public domain for free general use by RSA
     Data Security.

OpenBSD 2.6                    February 14, 1994                             1

Source: OpenBSD 2.6 man pages. Copyright: Portions are copyrighted by BERKELEY
SOFTWARE DESIGN, INC., The Regents of the University of California, Massachusetts
Institute of Technology, Free Software Foundation, FreeBSD Inc., and others.

(Corrections, notes, and links courtesy of RocketAware.com)

[Detailed Topics]
FreeBSD Sources for md5(1)
OpenBSD sources for md5(1)

[Overview Topics]

Up to: Data integrity and Security, Checksums and Digests - cryptography, message digests, etc.

RocketLink!--> Man page versions: OpenBSD FreeBSD Others

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