gohugoio-hugo/docs/content/en/functions/hmac.md

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hmac	Returns a cryptographic hash that uses a key to sign a message.	functions	docs parent functions	hmac checksum	crypto.HMAC HASH_TYPE KEY MESSAGE [ENCODING] hmac HASH_TYPE KEY MESSAGE [ENCODING]	hmac

Set the HASH_TYPE argument to md5, sha1, sha256, or sha512.

Set the optional ENCODING argument to either hex (default) or binary.

{{ hmac "sha256" "Secret key" "Secret message" }}
5cceb491f45f8b154e20f3b0a30ed3a6ff3027d373f85c78ffe8983180b03c84

{{ hmac "sha256" "Secret key" "Secret message" "hex" }}
5cceb491f45f8b154e20f3b0a30ed3a6ff3027d373f85c78ffe8983180b03c84

{{ hmac "sha256" "Secret key" "Secret message" "binary" | base64Encode }}
XM60kfRfixVOIPOwow7Tpv8wJ9Nz+Fx4/+iYMYCwPIQ=