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73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
/* rndriscos.c - raw random number for RISC OS
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* Copyright (C) 2001 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#include <config.h>
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#ifdef USE_RNDRISCOS
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#include <string.h>
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#include <kernel.h>
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#include <swis.h>
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#include "util.h"
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#define CryptRandom_Byte 0x51980
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static const char * const cryptrandom_path[] = {
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"GnuPG:CryptRandom",
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"GnuPG:CryptRand",
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"System:310.Modules.CryptRandom",
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"System:310.Modules.CryptRand",
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"System:Modules.CryptRandom",
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"System:Modules.CryptRand",
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NULL
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};
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/****************
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* Get the random bytes from module
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*/
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int
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rndriscos_gather_random(void (*add)(const void*, size_t, int), int requester,
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size_t length, int level)
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{
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static int rndriscos_initialized = 0;
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int n;
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byte buffer[768];
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if (!rndriscos_initialized)
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rndriscos_initialized = riscos_load_module("CryptRandom",
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cryptrandom_path, 1);
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while (length) {
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int nbytes = length < sizeof(buffer) ? length : sizeof(buffer);
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for (n = 0; n < nbytes; ++n)
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if (_swix(CryptRandom_Byte, _OUT(0), &buffer[n]))
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g10_log_fatal("CryptRandom module isn't working as expected!\n");
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(*add)(buffer, n, requester);
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length -= n;
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}
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wipememory(buffer, sizeof(buffer)); /* burn the buffer */
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return 0; /* success */
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}
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#endif /*USE_RNDRISCOS */
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