---
name: "openssl-core_dispatch.h"
section: "7ssl"
platform: "linux"
package: "openssl"
version: "3.6.5-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/openssl-core_dispatch.h"
---

# openssl-core\_dispatch.h(7ssl)

OpenSSL provider dispatch numbers and function types

## NAME

openssl/core\_dispatch.h - OpenSSL provider dispatch numbers and function types

## SYNOPSIS

```
 #include <openssl/core_dispatch.h>
```

## DESCRIPTION

The *\<openssl/core\_dispatch.h\>* header defines all the operation numbers, dispatch numbers and provider interface function types currently available.

The operation and dispatch numbers are represented with macros, which are named as follows:

- operation numbers

  These macros have the form `"OSSL_OP_`*opname*`"`.

- dispatch numbers

  These macros have the form `"OSSL_FUNC_`*opname*`_`*funcname*`"`, where `"`*opname*`"` is the same as in the macro for the operation this function belongs to.

With every dispatch number, there is an associated function type.

For further information, please see the **provider**(7)

## SEE ALSO

**provider**(7)

## HISTORY

The types and macros described here were added in OpenSSL 3.0.

## COPYRIGHT

Copyright 2020-2026 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (the "License").  You may not use this file except in compliance with the License.  You can obtain a copy in the file LICENSE in the source distribution or at \<https://www.openssl.org/source/license.html\>.