8465e968a8
iOS 10 has <sys/random.h> with getentropy, glibc >= 2.25 has <sys/random.h> with getentropy and getrandom. (glibc also pollutes <unistd.h>, but that seems like a bad idea.) Also, all supported devices now have kernels with the getrandom system call. We've had these available internally for a while, but it seems like the time is ripe to expose them. Bug: http://b/67014255 Test: ran tests Change-Id: I76dde1e3a2d0bc82777eea437ac193f96964f138
47 lines
1.8 KiB
C
47 lines
1.8 KiB
C
/*
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* Copyright (C) 2017 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _SYS_RANDOM_H_
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#define _SYS_RANDOM_H_
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <linux/random.h>
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__BEGIN_DECLS
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/* See also arc4random_buf in <stdlib.h>, which is available in all API levels. */
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int getentropy(void* __buffer, size_t __buffer_size) __wur __INTRODUCED_IN_FUTURE;
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ssize_t getrandom(void* __buffer, size_t __buffer_size, unsigned int __flags) __wur __INTRODUCED_IN_FUTURE;
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__END_DECLS
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#endif
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