[#BIO_hex_string]
= BIO_hex_string
:mrdocs:

Write `datalen` bytes from `data` as a colon‐separated hex string to a BIO.

== Synopsis

Declared in `<openssl/bio.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
BIO_hex_string(
    xref:BIO.adoc[BIO]* out,
    int indent,
    int width,
    void const* data,
    int datalen);
----

== Return Value

1 on success, or 0 on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *out*
| Destination BIO.
| *indent*
| Number of spaces to prefix the first line (and continuation lines as needed).
| *width*
| Maximum number of hex octets per line before wrapping (0 for no wrap).
| *data*
| Bytes to format.
| *datalen*
| Number of bytes at `data.`
|===


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