diff options
| -rw-r--r-- | lib/libc/hash/Makefile.inc | 4 | ||||
| -rw-r--r-- | lib/libc/hash/rmd160.3 | 224 |
2 files changed, 226 insertions, 2 deletions
diff --git a/lib/libc/hash/Makefile.inc b/lib/libc/hash/Makefile.inc index 2579c98dfe6..d198805fbbf 100644 --- a/lib/libc/hash/Makefile.inc +++ b/lib/libc/hash/Makefile.inc @@ -1,10 +1,10 @@ -# $OpenBSD: Makefile.inc,v 1.4 1997/07/17 05:37:01 millert Exp $ +# $OpenBSD: Makefile.inc,v 1.5 1997/07/17 06:02:42 millert Exp $ # hash functions .PATH: ${.CURDIR}/hash SRCS+= sha1.c sha1hl.c rmd160.c rmd160hl.c -MAN+= sha1.3 +MAN+= sha1.3 rmd160.3 MLINKS+=sha1.3 SHA1Init.3 MLINKS+=sha1.3 SHA1Update.3 MLINKS+=sha1.3 SHA1Final.3 diff --git a/lib/libc/hash/rmd160.3 b/lib/libc/hash/rmd160.3 new file mode 100644 index 00000000000..bcec1084a52 --- /dev/null +++ b/lib/libc/hash/rmd160.3 @@ -0,0 +1,224 @@ +.\" $OpenBSD: rmd160.3,v 1.1 1997/07/17 06:02:43 millert Exp $ +.\" +.\" Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com> +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by Todd C. Miller. +.\" 4. The name of the author may not be used to endorse or promote products +.\" derived from this software without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, +.\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY +.\" AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL +.\" THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, +.\" EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, +.\" PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; +.\" OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, +.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR +.\" OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF +.\" ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +.\" +.\" See http://www.esat.kuleuven.ac.be/~bosselae/ripemd160.html +.\" for detailed information about RIPEMD-160. +.\" +.Dd July 16, 1997 +.Dt RMD160 3 +.Sh NAME +.Nm RMD160Init , +.Nm RMD160Update , +.Nm RMD160Final , +.Nm RMD160Transform , +.Nm RMD160End , +.Nm RMD160File , +.Nm RMD160Data , +.Nd calculate the ``RIPEMD-160'' message digest +.Sh SYNOPSIS +.Fd #include <sys/types.h> +.Fd #include <rmd160.h> +.Ft void +.Fn RMD160Init "RMD160_CTX *context" +.Ft void +.Fn RMD160Update "RMD160_CTX *context" "const u_char *data" "u_int nbytes" +.Ft void +.Fn RMD160Final "u_char digest[20]" "RMD160_CTX *context" +.Ft void +.Fn RMD160Transform "u_int32_t state[5]" "const u_int32_t block[16]" +.Ft "char *" +.Fn RMD160End "RMD160_CTX *context" "char *buf" +.Ft "char *" +.Fn RMD160File "char *filename" "char *buf" +.Ft "char *" +.Fn RMD160Data "u_char *data" "u_int len" "char *buf" +.Sh DESCRIPTION +The RMD160 functions implement the 160-bit RIPE message digest hash algorithm +(RMD-160). RMD-160 is used to generate a condensed representation +of a message called a message digest. The algorithm takes a +message less than 2^64 bits as input and produces a 160-bit digest +suitable for use as a digital signature. +.Pp +The RMD160 functions are considered to be more secure than the +.Xr md4 3 +and +.Xr md5 3 +functions and at least as secure as the +.Xr sha1 3 +function. All share a similar interface. +.Pp +The +.Fn RMD160Init +function initializes a RMD160_CTX +.Ar context +for use with +.Fn RMD160Update , +and +.Fn RMD160Final . +The +.Fn RMD160Update +function adds +.Ar data +of length +.Ar nbytes +to the RMD160_CTX specified by +.Ar context. +.Fn RMD160Final +is called when all data has been added via +.Fn RMD160Update +and stores a message digest in the +.Ar digest +parameter. +When a null pointer is passed to +.Fn RMD160Final +as first argument only the final padding will be applied and the +current context can still be used with +.Fn RMD160Update . +.Pp +The +.Fn RMD160Transform +function is used by +.Fn RMD160Update +to hash 512-bit blocks and forms the core of the algorithm. +Most programs should use the interface provided by +.Fn RMD160Init , +.Fn RMD160Update +and +.Fn RMD160Final +instead of calling +.Fn RMD160Transform +directly. +.Pp +The +.Fn RMD160End +function is a front end for +.Fn RMD160Final +which converts the digest into an +.Tn ASCII +representation of the 160 bit digest in hexadecimal. +.Pp +The +.Fn RMD160File +function calculates the digest for a file and returns the result via +.Fn RMD160End . +If +.Fn RMD160File +is unable to open the file a NULL pointer is returned. +.Pp +The +.Fn RMD160Data +function +calculates the digest of an arbitrary string and returns the result via +.Fn RMD160End . +.Pp +For each of the +.Fn RMD160End , +.Fn RMD160File , +and +.Fn RMD160Data +functions the +.Ar buf +parameter should either be a string of at least 41 characters in +size or a NULL pointer. In the latter case, space will be dynamically +allocated via +.Xr malloc 3 +and should be freed using +.Xr free 3 +when it is no longer needed. +.Sh EXAMPLES +The follow code fragment will calculate the digest for +the string "abc" which is ``0x8eb208f7e05d987a9b044a8e98c6b087f15a0bfc''. +.Bd -literal -offset indent +RMD160_CTX rmd; +u_char results[20]; +char *buf; +int n; + +buf = "abc"; +n = strlen(buf); +RMD160Init(&rmd); +RMD160Update(&rmd, (u_char *)buf, n); +RMD160Final(results, &rmd); + +/* Print the digest as one long hex value */ +printf("0x"); +for (n = 0; n < 20; n++) + printf("%x", results[n]); +putchar('\\n'); +.Ed +.Pp +Alternately, the helper functions could be used in the following way: +.Bd -literal -offset indent +RMD160_CTX rmd; +u_char output[41]; +char *buf = "abc"; + +printf("0x%s", MD5Data(buf, strlen(buf), output)); +.Ed +.Sh CAVEATS +If a message digest is to be copied to a multi-byte type (ie: +an array of five 32-bit integers) it will be necessary to +perform byte swapping on little endian machines such as the i386, alpha, +and vax. +.Sh AUTHOR +This implementation of RMD-160 was written by Antoon Bosselaers. +.br +The +.Fn RMD160End , +.Fn RMD160File , +and +.Fn RMD160Data +helper functions are derived from code written by Poul-Henning Kamp. +.Sh SEE ALSO +.Xr rmd160 1 , +.Xr md4 3 , +.Xr md5 3 , +.Xr sha1 3 +.Pp +.Rs +.%A H. Dobbertin, A. Bosselaers, B. Preneel +.%T RIPEMD-160, a strengthened version of RIPEMD +.Re +.Rs +.%T Information technology - Security techniques - Hash-functions - Part 3: Dedicated hash-functions +.%O ISO/IEC 10118-3 +.Re +.Rs +.%A H. Dobbertin, A. Bosselaers, B. Preneel +.%T The RIPEMD-160 cryptographic hash function +.%J Dr. Dobb's Journal +.%V Vol. 22, No. 1 +.%D January 1997 +.%P pp. 24-28 +.Re +.Sh HISTORY +The RMD-160 functions appeared in +.Bx Open +2.1. |