[#RAND_pseudo_bytes]
= RAND_pseudo_bytes
:mrdocs:

Fill a buffer with bytes that need not be cryptographically strong (deprecated).

== Synopsis

Declared in `<openssl/rand.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
int
RAND_pseudo_bytes(
    unsigned char* buf,
    int num);
----

[WARNING]
====
https://en.cppreference.com/cpp/language/attributes/deprecated[Deprecated^]. Use of this entity is allowed but discouraged.
====
== Description

Prefer RAND_bytes() for all new code.

== Return Value

1 if the bytes are cryptographically strong, 0 if only pseudo‐random, or ‐1 on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *buf*
| Destination buffer to fill.
| *num*
| Number of bytes to write.
|===


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