/usr/include/wolfssl/openssl/rand.h is in libwolfssl-dev 3.13.0+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | /* rand.h for openSSL */
#include <wolfssl/openssl/ssl.h>
#include <wolfssl/wolfcrypt/random.h>
#define RAND_set_rand_method wolfSSL_RAND_set_rand_method
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