ref: 4b430d456afee9c6da5e5ab46084a05469be1430
dir: /docs/content/en/functions/hmac.md/
---
title: hmac
linktitle: hmac
description: Compute the cryptographic checksum of a message.
godocref:
date: 2020-05-29
publishdate: 2020-05-29
lastmod: 2020-05-29
categories: [functions]
menu:
docs:
parent: "functions"
keywords: [hmac,checksum]
signature: ["hmac HASH_TYPE KEY MESSAGE"]
workson: []
hugoversion:
relatedfuncs: [hmac]
deprecated: false
aliases: [hmac]
---
`hmac` returns a cryptographic hash that uses a key to sign a message.
```
{{ hmac "sha256" "Secret key" "Hello world, gophers!"}},
<!-- returns the string "b6d11b6c53830b9d87036272ca9fe9d19306b8f9d8aa07b15da27d89e6e34f40"
```
Supported hash functions:
* md5
* sha1
* sha256
* sha512