[#CRYPTO_zalloc]
= CRYPTO_zalloc
:mrdocs:

Allocate `num` bytes of zero‐initialized memory (file/line for debugging).

== Synopsis

Declared in `<openssl/crypto.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void*
CRYPTO_zalloc(
    size_t num,
    char const* file,
    int line);
----

== Return Value

Pointer to zeroed memory, or NULL on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *num*
| Number of bytes to allocate.
| *file*
| Source file name recorded with the allocation (usually *FILE*).
| *line*
| Source line recorded with the allocation (usually *LINE*).
|===


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