1MONGOC_RAND(3)                     libmongoc                    MONGOC_RAND(3)
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NAME

6       mongoc_rand - mongoc_rand
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8       MongoDB Random Number Generator
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SYNOPSIS

11          void
12          mongoc_rand_add (const void *buf, int num, double entropy);
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14          void
15          mongoc_rand_seed (const void *buf, int num);
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17          int
18          mongoc_rand_status (void);
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DESCRIPTION

21       The  mongoc_rand  family  of  functions provide access to the low level
22       randomness primitives used by the MongoDB  C  Driver.   In  particular,
23       they  control  the  creation  of cryptographically strong pseudo-random
24       bytes required by some security mechanisms.
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26       While we can usually pull enough entropy from the environment, you  may
27       be  required  to  seed the PRNG manually depending on your OS, hardware
28       and other entropy consumers running on the same system.
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ENTROPY

31       mongoc_rand_add and mongoc_rand_seed allow the user to directly provide
32       entropy.   They  differ  insofar as mongoc_rand_seed requires that each
33       bit provided is fully random.  mongoc_rand_add allows the user to spec‐
34       ify the degree of randomness in the provided bytes as well.
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STATUS

37       The  mongoc_rand_status function allows the user to check the status of
38       the mongoc PRNG.  This can be used to guarantee sufficient  entropy  at
39       program startup, rather than waiting for runtime errors to occur.
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AUTHOR

42       MongoDB, Inc
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45       2017-present, MongoDB, Inc
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501.16.2                           Feb 25, 2020                   MONGOC_RAND(3)
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