.TH XYMONDIGEST 1 "Version 4.3.30:  4 Sep 2019" "Xymon"
.SH NAME
xymondigest \- calculate message digests
.SH SYNOPSIS
.B "xymondigest md5|sha1|sha256|sha512|sha224|sha384|rmd160 [filename]"

.SH DESCRIPTION
.I xymondigest(1)
is a utility to calculate message digests for a file or
document. It is used when defining HTTP- or FTP-based
content checks, where 
.I xymonnet(1)
checks that a URL returns a specific document; instead
of having to compare the entire document, the comparison
is done against a pre-computed message digest value 
using the MD5, RIPEMD160, SHA1 or any of the SHA2 (SHA-512,
SHA-256, SHA-384, SHA-224) message digest algorithms.

The optional \fBfilename\fR parameter is the input
file whose message digest should be calculated; if no
filename is given, the data is read from standard input.

xymondigest outputs a string containing the digest algorithm
and the computed message digest. This is in a format
suitable for use in the
.I hosts.cfg(5)
definition of a content check.

.SH EXAMPLE

   $ xymondigest md5 index.html
   md5:88b81b110a85c83db56a939caa2e2cf6

   $ curl \-s http://www.foo.com/ | xymondigest sha1
   sha1:e5c69784cb971680e2c7380138e04021a20a45a2

.SH "SEE ALSO"
xymonnet(1), hosts.cfg(5)