[#EVP_CIPHER_param_to_asn1]
= EVP_CIPHER_param_to_asn1
:mrdocs:

Encode cipher parameters (typically including the IV) from `c` into an ASN1_TYPE.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_CIPHER_param_to_asn1(
    xref:EVP_CIPHER_CTX.adoc[EVP_CIPHER_CTX]* c,
    xref:ASN1_TYPE.adoc[ASN1_TYPE]* type);
----

== Return Value

1 on success, or 0/‐1 on failure (for example if the cipher lacks ASN.1 support).

== Parameters

[cols="1,4"]
|===
| Name| Description
| *c*
| Cipher context whose AlgorithmIdentifier parameters are written; the IV must already be set.
| *type*
| Destination ASN.1 type that receives the parameters.
|===


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