sha256
This block is part of the value group and was last modified in core v15.0.0.
sha256 v15.0.0 HMAC-SHA256 of the value keyed with the secret, as lowercase hex : e.g. to verify a webhook's X-Mssgs-Signature: sha256=<hex> header against the raw request body.
In pins 2
- secret required
value - value required
value
Out pins 1
- signature
value
Outputs the HMAC-SHA256 of value keyed with secret, as lowercase hex on the signature pin. Unwired or empty pins are treated as "" -- the block still emits a signature rather than erroring.
A typical wiring for sha256: get raw body feeds the secret pin; the signature out pin feeds convert to uppercase.
Commonly used with
In production blueprints, this block is most often wired together with:
- get raw body: feeds into this block. Returns the request body exactly as received on the wire, as a string — the bytes an HMAC signature covers. Use this (never a re-serialized object) when verifying signature headers like X-Mssgs-Signature.
- dynamic value: this block feeds into it. Returns the provided value with support for dynamic inpins using {name:type} placeholders — the pin's name first, then its type, e.g. {guid:value}.
Version history
Introduced in v15.0.0.
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