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Data integrity and Security, Checksums and Digests

cryptography, message digests, etc.
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Information and Publications: Showing

RFC1509 Generic Security Service API : C-bindings. [c. 1993/09/01]

RFC2286 Test Cases for HMAC-RIPEMD160 and HMAC-RIPEMD128. [c. 1998/02/01]

RFC2078 Generic Security Service Application Program Interface, Version 2. [c. 1997/01/01]

RFC1810 Report on MD5 Performance. [c. 1995/06/01]

RFC1805 Location-Independent Data/Software Integrity Protocol. [c. 1995/06/01]

RFC1624 Computation of the Internet Checksum via Incremental Update. [c. 1994/05/01]

RFC1864 The Content-MD5 Header Field. [c. 1995/10/01]

RFC1320 The MD4 Message-Digest Algorithm. [c. 1992/04/01]

RFC1321 The MD5 Message-Digest Algorithm. [c. 1992/04/01]

RFC1186 MD4 Message Digest Algorithm. [ 1990/10/01]

Crc.Txt - CRC calculation tutorial

Books: Showing

Digital Watermarking: Principles & Practice
[Ingemar Cox, et al; 2001-10-15] ISBN 1558607145
- At Barnes & Noble - At Amazon - At Half

Error Control Coding
[Shu Lin, Daniel J. Costello; 1982-10] ISBN 013283796X
- At Barnes & Noble - At Amazon - At Half

Error-Correcting Codes - Revised, 2nd Edition
[William Wesley Peterson, E. J. Weldon; 1972-03-15] ISBN 0262160390
- At Barnes & Noble - At Amazon - At Half

Articles: Showing

Design Techniques for Testable Embedded Error Checkers ( E.J. McCluskey ; IEEE Computer Magazine 1990-07)

- Design techniques to ensure the testability of embedded checkers that cannot be tested by scan-path bistables are presented. The discussion covers: types of error detectors; parity checkers and self-testing circuits; two-rail checkers; M-out-of-N checkers; and equality checkers. The techniques outline guarantee single stuck fault testability.

Error-Control Coding in Computers ( Eiji Fujiwara, Dhiraj K. Pradhan ; IEEE Computer Magazine 1990-07)

- In this article, intended for readers with basic knowledge in coding, the codes used in actual systems are surveyed. Error control in high-speed memories is examined, including bit-error-correcting/detecting codes, byte-error-correcting/detecting codes, and codes to detect single-byte errors as well as correct single-bit errors and detect double-bit errors. Tape and disk memory codes for error control in mass memories are discussed. Processor error control and unidirectional error-control codes are covered, including the application of the latter to masking asymmetric line faults.

Applications and Utilities: Showing

md5(1) - calculate a message-digest fingerprint (checksum) for a file {oss}

Man pages: FreeBSD
Source code: OpenBSD FreeBSD

rmd160(1) - calculate a message-digest fingerprint (checksum) for a file {oss}

Source code: OpenBSD

sha1(1) - calculate a message-digest fingerprint (checksum) for a file {oss}

Source code: OpenBSD

cksum(1) - display file checksums and block counts {oss}

Man pages: FreeBSD RedHat NetBSD
Source code: OpenBSD FreeBSD
[IEEE Std1003.2-1992 (``POSIX.2'')]

cksum - checksum and count the bytes in a file {GPL,GNU}

At GNU project textutils

md5sum - compute and check MD5 message digest {GPL,GNU}

At GNU project textutils

sum - checksum and count the blocks in a file {GPL,GNU}

At GNU project textutils

digest-20010807_2 - MD5/SHA-1/RIPEMD-160 checksumming utility

At FreeBSD Ports
digest-20010320 - Message digest wrapper utility (At NetBSD packages collection)

fastcrc-1.0 - Fast CRC routines

At FreeBSD Ports

p5-Digest-MD5-2.16 - Perl5 interface to the MD5 algorithm

At FreeBSD Ports
p5-Digest-MD5-2.12.tgz - module to calculate digests (At OpenBSD 2.8_packages i386)
p5-Digest-MD5-2.12.tgz - module to calculate digests (At OpenBSD 2.8_packages sparc)
p5-Digest-MD5-2.12 - Perl5 extension interface for various message digest algorithms (At NetBSD packages collection)

integrit-3.00.05 - Integrit is a file integrity verification programs

At FreeBSD Ports

mdw-1.0 - A utility to check the MD5 sum of a webpage

At FreeBSD Ports

p5-Digest-MD2-2.00 - Perl5 interface to the MD2 message digest algorithm

At FreeBSD Ports

p5-Digest-SHA1-2.01 - Perl interface to the SHA-1 Algorithm

At FreeBSD Ports

p5-Crypt-RIPEMD160-0.04 - RIPEMD-160 message digest algorithm

At FreeBSD Ports

p5-Digest-BubbleBabble-0.01 - Perl5 interface to a fingerprint in "bubble babble" format

At FreeBSD Ports

p5-Digest-HMAC-1.01 - Perl5 interface to HMAC Message-Digest Algorithms

At FreeBSD Ports

p5-String-CRC32-1.2 - Perl interface for cyclic redundency check generation

At FreeBSD Ports

sha-1.0.2 - Simple file hash program utilizing SHA-1, SHA-256, SHA-384, SHA-512

At FreeBSD Ports

fingerprint - a uniform interface to MD5, snefru, et al {oss}

At comp.sources.unix at ISC
a universal hash/checksum package (At comp.sources.unix at ISC)
a universal hash/checksum package, (At comp.sources.unix at UUNET)
a uniform interface to MD5, snefru, et al, V0.75, (At comp.sources.unix at UUNET)

hash8 - Hash long identifiers into unique short ones {oss}

At comp.sources.unix
hash8hash (At comp.sources.unix at UUNET)

shash-0.2.3.tgz - generates or checks digests or mac

At OpenBSD 2.8_packages i386
http://www.openbsd.org/2.8_packages/sparc/shash-0.2.3.tgz-long.html (At OpenBSD 2.8_packages sparc)

Modulinf.H - Defines structure and macros for status tracking {oss}

At snippets.org

Modulus.C - Basic routines for creating and checking modulus values {oss}

At snippets.org

shash-0.2.3-static.tgz - generates or checks digests or mac

At OpenBSD 2.8_packages i386
http://www.openbsd.org/2.8_packages/sparc/shash-0.2.3-static.tgz-long.html (At OpenBSD 2.8_packages sparc)

Libraries and Components: Showing

MD4Init MD4Update MD4Final MD4End MD4File MD4Data (3) - calculate the RSA Data Security, Inc., ``MD4'' message digest {oss}

Man pages: FreeBSD

MD5Init MD5Update MD5Final MD5End MD5File MD5Data (3) - calculate the RSA Data Security, Inc., ``MD5'' message digest {oss}

Man pages: FreeBSD RedHat

SHA1Init SHA1Update SHA1Final SHA1Transform SHA1End SHA1File SHA1Data (3) - calculate the NIST Secure Hash Algorithm {oss}

Man pages: FreeBSD
Source code: OpenBSD

RMD160Init RMD160Update RMD160Final RMD160Transform RMD160End RMD160File RMD160Data (3) - calculate the ``RIPEMD-160'' message digest {oss}

Source code: OpenBSD

mhash-0.8.13 - Library provides an easy way to access strong hashes such as MD5 and SHA1

At FreeBSD Ports
mhash-0.8.2.tgz - strong hash library (At OpenBSD 2.8_packages i386)
mhash-0.8.2.tgz - strong hash library (At OpenBSD 2.8_packages sparc)
mhash-0.8.3 - hash algorithms library (At NetBSD packages collection)

ruby-hmac-0.3 - A Ruby library which implements the HMAC algorithm

At FreeBSD Ports

Parity.H,Parity.C - Header for PARITY.C {oss}

At snippets.org

Crc.H - Header file for SNIPPETS CRC and checksum functions {oss}

At snippets.org

Arccrc16.C - Compute CRC's using ARC, LZH algorithm {oss}

At snippets.org

Crc_16.C - Calculated 16-bit CRC {oss}

At snippets.org

Crc_16F.C - Fast 16-bit CRC {oss}

At snippets.org

Crc_32.C - Table lookup 32-bit CRC {oss}

At snippets.org

Checksum.C - Calculate checksum {oss}

At snippets.org

Crc.Hpp,Crc.Cpp - Multiple CRC calculation class {oss}

At snippets.org

Parity.C - Compute parity for any integral type {oss}

At snippets.org

Checkexe.C - Checksum protection for executable files {oss}

At snippets.org

Various CRC and checksum functions {oss}

At snippets.org

MD5 - RSA's MD5 message digest algorithm. Computes a one-way "thumbnail" of a message that's pretty hard to spoof, so bad guys won't be able to tamper with your message. Also see the SHA module. [Perl] {oss}


SHA - Interface to the NIST Secure Hash Algorithm (SHA). Also see the MD5 module above. [Perl] {oss}


Mac::Apps::MacPGP - An interface to Pretty Good Privacy for Macs. [Perl] {oss}


Libraries and Functions

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Kerberos authentication


Random number generators are covered at Integer math - (including rational numbers, Big/Wide integers)

Up to Persistent Data - Gateway topic to externally stored and transmitted data.

see also Process Limits: Identity - Process ownership and Identity

see also Process Limits: File Access - Process Limits on File access (permissions, ownership, modes, et al)

(There may be additional related subject pages listed here)

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