[#ASN1_STRING_set0]
= ASN1_STRING_set0
:mrdocs:

Assign an ASN.1 string ownership of an existing data buffer.

== Synopsis

Declared in `<openssl/asn1.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
ASN1_STRING_set0(
    xref:ASN1_STRING.adoc[ASN1_STRING]* str,
    void* data,
    int len);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *str*
| String whose content pointer and length are replaced.
| *data*
| Buffer that `str` will own (freed by ASN1_STRING_free); may be NULL when `len` is 0.
| *len*
| Length of `data` in bytes.
|===


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