spum_response_hdr_len(9)

✨ spum_response_hdr_len(9) ✨

okay so bestie, welcome to the kernel API manual 🫶 this one's a little function from the 9 section (that's the kernel API girlies 💅) and it's literally all about figuring out how big a SPU response header is gonna be. no cap.

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🌸 NAME 🌸

spum_response_hdr_len — given the length of the hash key and encryption key, determine the expected length of a SPU response header 💖

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🦋 SYNOPSIS 🦋

u16 spum_response_hdr_len (u16 auth_key_len , u16 enc_key_len , bool
is_hash );

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🎀 ARGUMENTS 🎀

• auth_key_len — the authentication key length, in bytes 👑
• enc_key_len — the encryption key length, in bytes 🔥
• is_hash — a bool, and it's true if the response message is for a hash operation ✨

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⭐ RETURN ⭐

the length of the SPU response header, in bytes 💜

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🧚 SEE ALSO 🧚

kernel file ./drivers/crypto/bcm/spu.c (yes, that's the one, iykyk), plus the whole friend group:

• spum_ns2_ctx_max_payload(9)
• spum_nsp_ctx_max_payload(9)
• spum_hash_pad_len(9)
• spum_gcm_ccm_pad_len(9)
• spum_assoc_resp_len(9)
• spum_aead_ivlen(9)
• spum_hash_type(9)
• spum_digest_size(9)
• spum_create_request(9)
• spum_cipher_req_init(9)
• spum_cipher_req_finish(9)
• spum_request_pad(9)
• spum_xts_tweak_in_payload(9)
• spum_tx_status_len(9)
• spum_rx_status_len(9)
• spum_status_process(9)
• spum_ccm_update_iv(9)
• spum_wordalign_padlen(9)

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💀 quick vibe check: this page is from ./drivers/crypto/bcm, dated October 2026, bestie — that's the source and date, so don't come for me, i'm just relaying the info 🎀

and that's the whole page, periodt 💅 ✨ 🌈