84 lines
2.9 KiB
HTML
84 lines
2.9 KiB
HTML
<head>
|
|
<title>genrandom(3) - Plan 9 from User Space</title>
|
|
<meta content="text/html; charset=utf-8" http-equiv=Content-Type>
|
|
</head>
|
|
<body bgcolor=#ffffff>
|
|
<table border=0 cellpadding=0 cellspacing=0 width=100%>
|
|
<tr height=10><td>
|
|
<tr><td width=20><td>
|
|
<tr><td width=20><td><b>GENRANDOM(3)</b><td align=right><b>GENRANDOM(3)</b>
|
|
<tr><td width=20><td colspan=2>
|
|
<br>
|
|
<p><font size=+1><b>NAME </b></font><br>
|
|
|
|
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
|
|
|
|
genrandom, prng – random number generation<br>
|
|
|
|
</table>
|
|
<p><font size=+1><b>SYNOPSIS </b></font><br>
|
|
|
|
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
|
|
|
|
<tt><font size=+1>#include <u.h><br>
|
|
#include <libc.h><br>
|
|
#include <mp.h><br>
|
|
#include <libsec.h>
|
|
<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
|
|
</font></tt>
|
|
<tt><font size=+1>void genrandom(uchar *buf, int nbytes)
|
|
<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
|
|
</font></tt>
|
|
<tt><font size=+1>void prng(uchar *buf, int nbytes)<br>
|
|
</font></tt>
|
|
</table>
|
|
<p><font size=+1><b>DESCRIPTION </b></font><br>
|
|
|
|
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
|
|
|
|
Most security software requires a source of random or, at the
|
|
very least, unguessable numbers.
|
|
<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
|
|
|
|
<i>Genrandom</i> fills a buffer with bytes from the X9.17 pseudo-random
|
|
number generator. The X9.17 generator is seeded by 24 truly random
|
|
bytes read via <i>truerand</i> (see <a href="../man3/rand.html"><i>rand</i>(3)</a>).
|
|
<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
|
|
|
|
<i>Prng</i> uses the native <a href="../man3/rand.html"><i>rand</i>(3)</a> pseudo-random number generator to
|
|
fill the buffer. Used with <i>srand</i>, this function can produce a
|
|
reproducible stream of pseudo random numbers useful in testing.
|
|
|
|
<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
|
|
|
|
Both functions may be passed to <i>mprand</i> (see <a href="../man3/mp.html"><i>mp</i>(3)</a>).<br>
|
|
|
|
</table>
|
|
<p><font size=+1><b>SOURCE </b></font><br>
|
|
|
|
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
|
|
|
|
<tt><font size=+1>/usr/local/plan9/src/libsec<br>
|
|
</font></tt>
|
|
</table>
|
|
<p><font size=+1><b>SEE ALSO </b></font><br>
|
|
|
|
<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
|
|
|
|
<a href="../man3/mp.html"><i>mp</i>(3)</a><br>
|
|
|
|
</table>
|
|
|
|
<td width=20>
|
|
<tr height=20><td>
|
|
</table>
|
|
<!-- TRAILER -->
|
|
<table border=0 cellpadding=0 cellspacing=0 width=100%>
|
|
<tr height=15><td width=10><td><td width=10>
|
|
<tr><td><td>
|
|
<center>
|
|
<a href="../../"><img src="../../dist/spaceglenda100.png" alt="Space Glenda" border=1></a>
|
|
</center>
|
|
</table>
|
|
<!-- TRAILER -->
|
|
</body></html>
|