projects / OpenSPARC-T2-SAM / blame
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| 54 | <H2><A NAME="SECTION008170000000000000000"></A><A NAME="os-miscfunc"></A> | |
| 55 | <BR> | |
| 56 | 6.1.7 Miscellaneous Functions | |
| 57 | </H2> | |
| 58 | ||
| 59 | <P> | |
| 60 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
| 61 | <td><nobr><b><tt id='l2h-1733' xml:id='l2h-1733' class="function">urandom</tt></b>(</nobr></td> | |
| 62 | <td><var>n</var>)</td></tr></table></dt> | |
| 63 | <dd> | |
| 64 | Return a string of <var>n</var> random bytes suitable for cryptographic use. | |
| 65 | ||
| 66 | <P> | |
| 67 | This function returns random bytes from an OS-specific | |
| 68 | randomness source. The returned data should be unpredictable enough for | |
| 69 | cryptographic applications, though its exact quality depends on the OS | |
| 70 | implementation. On a UNIX-like system this will query /dev/urandom, and | |
| 71 | on Windows it will use CryptGenRandom. If a randomness source is not | |
| 72 | found, <tt class="exception">NotImplementedError</tt> will be raised. | |
| 73 | ||
| 74 | <span class="versionnote">New in version 2.4.</span> | |
| 75 | ||
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| 114 | <span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span> | |
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