[#BIO_new_mem_buf]
= BIO_new_mem_buf
:mrdocs:

Create a read‐only memory BIO that reads from an existing buffer.

== Synopsis

Declared in `<openssl/bio.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BIO.adoc[BIO]*
BIO_new_mem_buf(
    void const* buf,
    int len);
----

== Return Value

New memory BIO, or NULL on error; free with BIO_free().

== Parameters

[cols="1,4"]
|===
| Name| Description
| *buf*
| Pointer to `len` bytes of data (not copied; must remain valid for the BIO's life).
| *len*
| Length of `buf` in bytes, or ‐1 to use strlen(`buf).`
|===


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