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| <tr><td width=20><td><b>GENRANDOM(3)</b><td align=right><b>GENRANDOM(3)</b> |
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| <p><font size=+1><b>NAME </b></font><br> |
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| genrandom, prng – random number generation<br> |
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| <p><font size=+1><b>SYNOPSIS </b></font><br> |
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| <tt><font size=+1>#include <u.h><br> |
| #include <libc.h><br> |
| #include <mp.h><br> |
| #include <libsec.h> |
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| </font></tt> |
| <tt><font size=+1>void genrandom(uchar *buf, int nbytes) |
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| <tt><font size=+1>void prng(uchar *buf, int nbytes)<br> |
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| <p><font size=+1><b>DESCRIPTION </b></font><br> |
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| Most security software requires a source of random or, at the |
| very least, unguessable numbers. |
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| <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>). |
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| <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. |
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| Both functions may be passed to <i>mprand</i> (see <a href="../man3/mp.html"><i>mp</i>(3)</a>).<br> |
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| <p><font size=+1><b>SOURCE </b></font><br> |
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| <tt><font size=+1>/usr/local/plan9/src/libsec<br> |
| </font></tt> |
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| <p><font size=+1><b>SEE ALSO </b></font><br> |
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| <a href="../man3/mp.html"><i>mp</i>(3)</a><br> |
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