1CRYPTO_MEMCMP(3)                    OpenSSL                   CRYPTO_MEMCMP(3)
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NAME

6       CRYPTO_memcmp - Constant time memory comparison
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SYNOPSIS

9        #include <openssl/crypto.h>
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11        int CRYPTO_memcmp(const void *a, const void *b, size_t len);
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DESCRIPTION

14       The CRYPTO_memcmp function compares the len bytes pointed to by a and b
15       for equality.  It takes an amount of time dependent on len, but
16       independent of the contents of the memory regions pointed to by a and
17       b.
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RETURN VALUES

20       CRYPTO_memcmp() returns 0 if the memory regions are equal and nonzero
21       otherwise.
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NOTES

24       Unlike memcmp(2), this function cannot be used to order the two memory
25       regions as the return value when they differ is undefined, other than
26       being nonzero.
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29       Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
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31       Licensed under the Apache License 2.0 (the "License").  You may not use
32       this file except in compliance with the License.  You can obtain a copy
33       in the file LICENSE in the source distribution or at
34       <https://www.openssl.org/source/license.html>.
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381.1.1l                            2021-09-15                  CRYPTO_MEMCMP(3)
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