Function Description

Table 1 describes the interfaces that can be called by the algorithm library.

**Table 1** Unified interfaces for the SHA1 MB algorithm
Interface	Description
hmac_sha1_key_data	Processes the original key and generates a derived key.
hmac_sha1_init	Initializes the hmac_sha1 computation context structure using the derived key.
hmac_sha1_update	Processes input data blocks and updates the hmac_sha1 context status.
hmac_sha1_update_x2	Processes two independent data streams concurrently.
hmac_sha1_update_x3	Processes three independent data streams concurrently.
hmac_sha1_final	Performs hmac_sha1 computation and generates a 160-bit message digest.