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Crypto HMAC Node

The Crypto HMAC node computes an HMAC (Hash-based Message Authentication Code).

Crypto HMAC Node

Description​

The Crypto HMAC node computes an HMAC using a secret key and input data. HMAC provides both authentication and integrity verification.

Execution Inputs​

  • In (execution): The execution flow enters through this pin

Variable Inputs​

  • Data (string): The data to authenticate
  • Key (string): The secret key for HMAC computation
  • Algorithm (string, property): The hash algorithm to use (e.g., "SHA256", "SHA1")

Execution Outputs​

  • Out (execution): Execution continues after the HMAC is computed

Variable Outputs​

  • HMAC (string): The computed HMAC value (typically as hex string)

Special Notes​

  • HMAC algorithm is set in node properties
  • Requires both data and a secret key
  • HMAC output is typically a hex string
  • Use for API authentication, message signing, or data integrity with authentication

Example Usage​

Sign API requests, authenticate messages, or verify data integrity with authentication. For example, compute HMAC for API request signing.

Flow Download Example​

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Additional Pictures​

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