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W.C.A. Wijngaards
61ca4111a1
- Merge #1383 from jdek: Fix randomness generation on macOS/iOS under chroot.
45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
/* $OpenBSD: getentropy_osx.c,v 1.12 2018/11/20 08:04:28 deraadt Exp $ */
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/*
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* Copyright (c) 2014 Theo de Raadt <deraadt@openbsd.org>
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* Copyright (c) 2014 Bob Beck <beck@obtuse.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Emulation of getentropy(2) as documented at:
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* http://man.openbsd.org/getentropy.2
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*/
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/* Modified to use SecRandomCopyBytes. It is from macOS 10.7 (2011) and
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* iOS 2.0 (2008), and is the primary API for cryptographic random numbers. */
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#include <errno.h>
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#include <Security/SecRandom.h>
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int getentropy(void *buf, size_t len);
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int
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getentropy(void *buf, size_t len)
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{
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if (len > 256) {
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goto error;
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}
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if (SecRandomCopyBytes(kSecRandomDefault, len, buf) == errSecSuccess) {
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return 0;
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}
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error:
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errno = EIO;
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return -1;
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}
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