-/*
- * Copyright (c) 1999-2001,2005-2008,2010-2011 Apple Inc. All Rights Reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-
-/*
- * sslRand.c - Randomness
- */
-
-/* THIS FILE CONTAINS KERNEL CODE */
-
-#include "sslRand.h"
-#include "sslDebug.h"
-#include <AssertMacros.h>
-
-#ifdef KERNEL
-
-void read_random(void* buffer, u_int numBytes);
-
-#else
-
-#include <TargetConditionals.h>
-
-#ifdef TARGET_OS_EMBEDDED
-#include <Security/SecRandom.h>
-#else
-static
-int sslRandMacOSX(void *data, size_t len)
-{
- static int random_fd = -1;
-
- if (random_fd == -1) {
- random_fd = open("/dev/random", O_RDONLY);
- if (random_fd == -1) {
- sslErrorLog("sslRand: error opening /dev/random: %s\n",
- strerror(errno));
- return -1;
- }
- }
-
- ssize_t bytesRead = read(random_fd, data, len);
- if (bytesRead != len) {
- sslErrorLog("sslRand: error reading %lu bytes from /dev/random: %s\n",
- len, strerror(errno));
- serr = -1;
- }
-
- return serr;
-}
-#endif /* TARGET_OS_EMBEDDED */
-
-#endif /* KERNEL */
-
-/*
- * Common RNG function.
- */
-int sslRand(SSLBuffer *buf)
-{
- check(buf != NULL);
- check(buf->data != NULL);
-
- if(buf->length == 0) {
- sslErrorLog("sslRand: zero buf->length\n");
- return 0;
- }
-
-#ifdef KERNEL
- read_random(buf->data, (u_int)buf->length);
- return 0;
-#else
-#ifdef TARGET_OS_EMBEDDED
- return SecRandomCopyBytes(kSecRandomDefault, buf->length, buf->data);
-#else
- return sslRandMacOSX(ctx, buf);
-#endif
-#endif
-}