spu2_response_hdr_len(9)

✨ NAME ✨

spu2_response_hdr_len — bestie, this one tells you the expected length of a SPU response header 💅

Like, it's a little function from the Kernel API Manual and it's literally just here to hand you a number, no cap.

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🌸 SYNOPSIS 🌸

u16 spu2_response_hdr_len (u16 auth_key_len , u16 enc_key_len , bool is_hash );

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🎀 ARGUMENTS 🎀

• auth_key_len — the length of the authentication key, in bytes ✨
• enc_key_len — the length of the encryption key, in bytes 🔥
• is_hash — unused 🙈 it's just sitting there, being decorative, living its truth

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🦋 DESCRIPTION 🦋

Okay so for SPU2, this includes just FMD. That's it. OMD is never requested — not even once, not even a little. Periodt. 💅

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💖 RETURN 💖

The length of FMD, in bytes 🎀

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🌈 SEE ALSO 🌈

Kernel file ./drivers/crypto/bcm/spu2.c, plus the whole squad right here:

• spu2_cipher_xlate(9)
• spu2_hash_xlate(9)
• spu2_fmd_init(9)
• spu2_fmd_ctrl0_write(9)
• spu2_fmd_ctrl1_write(9)
• spu2_fmd_ctrl2_write(9)
• spu2_fmd_ctrl3_write(9)
• spu2_ctx_max_payload(9)
• spu2_payload_length(9)
• spu2_hash_pad_len(9)
• spu2_gcm_ccm_pad_len(9)
• spu2_assoc_resp_len(9)
• spu2_aead_ivlen(9)
• spu2_hash_type(9)
• spu2_digest_size(9)
• spu2_create_request(9)
• spu2_cipher_req_init(9)
• spu2_cipher_req_finish(9)
• spu2_request_pad(9)
• spu2_xts_tweak_in_payload(9)
• spu2_tx_status_len(9)
• spu2_rx_status_len(9)
• spu2_status_process(9)
• spu2_ccm_update_iv(9)
• spu2_wordalign_padlen(9)

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ngl bestie, the whole page is short and sweet — read it, cite it, slay it 👑

Okay so that's the whole thing! This lil page lives in the Kernel API Manual, comes from ./drivers/crypto/bcm, and it's dated October 2026 — iconic behavior fr fr 🫶💖