---
name: "octcrypto"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/octcrypto"
---

# octcrypto(4)

OCTEON cryptographic unit

## NAME

**octcrypto** – OCTEON cryptographic unit

## SYNOPSIS

**octcrypto0 at mainbus0**

## DESCRIPTION

The **octcrypto** driver utilizes the OCTEON cryptographic unit to provide a hardware-accelerated implementation of the following algorithms for [ipsec(4)](/ipsec/4.md):

-

  AES-CBC

-

  AES-CTR

-

  AES-GCM

-

  AES-GMAC

-

  HMAC-MD5

-

  HMAC-SHA1

-

  HMAC-SHA2-256

-

  HMAC-SHA2-384

-

  HMAC-SHA2-512

## SEE ALSO

[intro(4)](/intro/4.md), [ipsec(4)](/ipsec/4.md), [crypto(9)](/crypto/9.md)

## HISTORY

The **octcrypto** driver first appeared in OpenBSD 6.4.