[#ASN1_TYPE_get_octetstring]
= ASN1_TYPE_get_octetstring
:mrdocs:

Copy the OCTET STRING contents of an ASN1_TYPE into `data.`

== Synopsis

Declared in `<openssl/asn1.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
ASN1_TYPE_get_octetstring(
    xref:ASN1_TYPE.adoc[ASN1_TYPE] const* a,
    unsigned char* data,
    int max_len);
----

== Return Value

Full OCTET STRING length on success, or ‐1 on type/content error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *a*
| ASN1_TYPE that must hold V_ASN1_OCTET_STRING.
| *data*
| Buffer that receives up to `max_len` content octets.
| *max_len*
| Capacity of `data` in bytes.
|===


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