[#ASN1_sign]
= ASN1_sign
:mrdocs:

Sign ASN.1 data described by an i2d encoder using `pkey` (deprecated).

== Synopsis

Declared in `<openssl/x509.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
int
ASN1_sign(
    xref:i2d_of_void.adoc[i2d_of_void]* i2d,
    xref:X509_ALGOR.adoc[X509_ALGOR]* algor1,
    xref:X509_ALGOR.adoc[X509_ALGOR]* algor2,
    xref:ASN1_BIT_STRING.adoc[ASN1_BIT_STRING]* signature,
    char* data,
    xref:EVP_PKEY.adoc[EVP_PKEY]* pkey,
    xref:EVP_MD.adoc[EVP_MD] const* type);
----

[WARNING]
====
https://en.cppreference.com/cpp/language/attributes/deprecated[Deprecated^]. Use of this entity is allowed but discouraged.
====
== Return Value

* Signature length in bytes on success, or 0 on failure.
* Signature length in bytes on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *i2d*
| Encoder that serializes `data` into DER for hashing.
| *algor1*
| Optional AlgorithmIdentifier updated with the signature algorithm, or NULL.
| *algor2*
| Optional second AlgorithmIdentifier updated similarly, or NULL.
| *signature*
| Output BIT STRING that receives the signature bits.
| *data*
| Structure passed to `i2d.`
| *pkey*
| Private key used for signing.
| *type*
| Digest algorithm used to hash the DER encoding.
|===


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