[#CRYPTO_secure_zalloc]
= CRYPTO_secure_zalloc
:mrdocs:

Allocate `num` bytes from the secure heap and zero them.

== Synopsis

Declared in `<openssl/crypto.h>`

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

== Return Value

Pointer to zeroed secure memory, or NULL on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *num*
| Number of bytes to allocate.
| *file*
| Source file name for allocation tracking (usually OPENSSL_FILE).
| *line*
| Source line for allocation tracking (usually OPENSSL_LINE).
|===


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