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32 lines
925 B
Markdown
32 lines
925 B
Markdown
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---
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title: crypto.HMAC
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description: Returns a cryptographic hash that uses a key to sign a message.
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categories: []
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keywords: []
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action:
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aliases: [hmac]
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related:
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- functions/crypto/FNV32a
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- functions/crypto/MD5
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- functions/crypto/SHA1
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- functions/crypto/SHA256
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returnType: string
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signatures: ['crypto.HMAC HASH_TYPE KEY MESSAGE [ENCODING]']
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aliases: [/functions/hmac]
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---
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Set the `HASH_TYPE` argument to `md5`, `sha1`, `sha256`, or `sha512`.
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Set the optional `ENCODING` argument to either `hex` (default) or `binary`.
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```go-html-template
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{{ hmac "sha256" "Secret key" "Secret message" }}
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5cceb491f45f8b154e20f3b0a30ed3a6ff3027d373f85c78ffe8983180b03c84
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{{ hmac "sha256" "Secret key" "Secret message" "hex" }}
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5cceb491f45f8b154e20f3b0a30ed3a6ff3027d373f85c78ffe8983180b03c84
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{{ hmac "sha256" "Secret key" "Secret message" "binary" | base64Encode }}
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XM60kfRfixVOIPOwow7Tpv8wJ9Nz+Fx4/+iYMYCwPIQ=
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```
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