1 files changed, 147 insertions, 0 deletions
diff --git a/cipher/rndriscos.c b/cipher/rndriscos.c
new file mode 100644
index 000000000..47144517a
--- /dev/null
+++ b/cipher/rndriscos.c
@@ -0,0 +1,147 @@
+/* rndriscos.c  -  raw random number for RISC OS
+ *	Copyright (C) 2001 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuPG is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <kernel.h>
+#include <swis.h>
+#include "util.h"
+#include "dynload.h"
+
+static int init_device(void);
+static int gather_random(void (*add)(const void*, size_t, int), int requester,
+			 size_t length, int level);
+
+#define CryptRandom_Byte 0x51980
+
+/****************
+ * Used to load the CryptRandom module if it isn't already loaded
+ */
+static int
+init_device(void)
+{
+    _kernel_swi_regs r;
+
+    /* Is CryptRandom already loaded? */
+    r.r[0] = 18;
+    r.r[1] = (int) "CryptRandom";
+    if (!_kernel_swi(OS_Module, &r, &r))
+        return 1;
+
+    /* Is it named CryptRand and inside GnuPG$Path? */
+    r.r[0] = 1;
+    r.r[1] = (int) "GnuPG:CryptRand";
+    if (!_kernel_swi(OS_Module, &r, &r))
+        return 1;
+
+    /* Is it named CryptRandom and inside GnuPG$Path? */
+    r.r[0] = 1;
+    r.r[1] = (int) "GnuPG:CryptRandom";
+    if (!_kernel_swi(OS_Module, &r, &r))
+        return 1;
+
+    /* Can't find CryptRandom in the default locations */
+    g10_log_fatal("Can't load module CryptRandom.\n");
+}
+
+
+/****************
+ */
+static int
+gather_random(void (*add)(const void*, size_t, int), int requester,
+	      size_t length, int level)
+{
+    static int initialized = 0;
+    int n;
+    byte buffer[768];
+    _kernel_swi_regs r;
+    _kernel_oserror *e;
+
+    if (!initialized)
+        initialized = init_device();
+
+    while (length) {
+        int nbytes = length < sizeof(buffer) ? length : sizeof(buffer);
+
+        for (n = 0; n < nbytes; n++) {
+            if (e = _kernel_swi(CryptRandom_Byte, &r, &r))
+                g10_log_fatal("CryptRandom module isn't working as expected!\n");
+            buffer[n] = (byte) r.r[0];
+        }
+
+	(*add)(buffer, n, requester);
+	length -= n;
+    }
+    memset(buffer, 0, sizeof(buffer));
+
+    return 0; /* success */
+}
+
+
+
+#ifndef IS_MODULE
+static
+#endif
+const char * const gnupgext_version = "RNDRISCOS ($Revision$)";
+
+static struct {
+    int class;
+    int version;
+    int (*func)(void);
+} func_table[] = {
+    { 40, 1, (int (*)(void))gather_random },
+};
+
+
+#ifndef IS_MODULE
+static
+#endif
+void *
+gnupgext_enum_func( int what, int *sequence, int *class, int *vers )
+{
+    void *ret;
+    int i = *sequence;
+
+    do {
+	if ( i >= DIM(func_table) || i < 0 ) {
+	    return NULL;
+	}
+	*class = func_table[i].class;
+	*vers  = func_table[i].version;
+	ret = (void*) func_table[i].func;
+	i++;
+    } while ( what && what != *class );
+
+    *sequence = i;
+    return ret;
+}
+
+#ifndef IS_MODULE
+void
+rndriscos_constructor(void)
+{
+    register_internal_cipher_extension( gnupgext_version,
+					gnupgext_enum_func );
+}
+#endif
+