[#PEM_write_bio]
= PEM_write_bio
:mrdocs:

Write a PEM object (header, optional headers, and base64 body) to a BIO.

== Synopsis

Declared in `<openssl/pem.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
PEM_write_bio(
    xref:BIO.adoc[BIO]* bp,
    char const* name,
    char const* hdr,
    unsigned char const* data,
    long len);
----

== Return Value

1 on success, or 0 on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *bp*
| BIO that receives the PEM text.
| *name*
| PEM type label such as "CERTIFICATE".
| *hdr*
| Optional additional header lines, or NULL / empty string.
| *data*
| Binary payload to base64‐encode.
| *len*
| Length of `data` in bytes.
|===


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