STRUCT CCP_SHA_ENGINE(9)

👑 NAME 👑

struct ccp_sha_engine — the CCP SHA operation, bestie. It's the struct that holds literally everything you need for a SHA run on the CCP ✨

So this one lives in the Kernel API Manual — yes, that's our manual, we're fancy now 💅

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🦋 SYNOPSIS 🦋

struct ccp_sha_engine {
    enum ccp_sha_type type;
    struct scatterlist *ctx;
    u32 ctx_len;
    struct scatterlist *src;
    u64 src_len;
    struct scatterlist *opad;
    u32 opad_len;
    u32 first;
    u32 final;
    u64 msg_bits;
 };

That's the whole glow-up right there 🎀 copy it exactly, no cap.

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🌸 Members 🌸

Ok so every single field, one by one, and what it's giving:

• type — the type of SHA operation you're doing ✨ like, which flavor.
• ctx — the current hash value. This is the main character, lowkey.
• ctx_len — length in bytes of the hash value, so ctx knows how big it is 💖
• src — the data to be used for this operation. The actual snack.
• src_len — length in bytes of the data used for this operation 🍓
• opad — data to be used for the final HMAC operation 👀 yes, final, keep that in mind.
• opad_len — length in bytes of the data used for that final HMAC operation.
• first — indicates the first SHA operation. The beginning, the origin story 🌈
• final — indicates the final SHA operation. The grand finale 🎬
• msg_bits — total length of the message in bits, used in the final SHA operation 🧚

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✨ Description ✨

Here's the vibe check: these are the variables you have to set when calling ccp_enqueue_cmd 📝 no skipping, that's the whole assignment:

• type, ctx, ctx_len, src, src_len, final
• msg_bits if final is non-zero

And now the important part, bestie, listen — the ctx variable is used as both input and output 😭 like it's doing double duty. On completion of the SHA operation, the new hash value overwrites the old hash value. So your old hash? Gone. Replaced. Slay, but be aware 🔥

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💜 SEE ALSO 💜

Kernel file ./include/linux/ccp.h — and a whole friend group of references:

• ccp_present(9)
• ccp_version(9)
• ccp_enqueue_cmd(9)
• struct ccp_aes_engine(9)
• struct ccp_xts_aes_engine(9)
• struct ccp_des3_engine(9)
• struct ccp_rsa_engine(9)
• struct ccp_passthru_engine(9)
• struct ccp_passthru_nomap_engine(9)
• struct ccp_ecc_modular_math(9)
• struct ccp_ecc_point(9)
• struct ccp_ecc_point_math(9)
• struct ccp_ecc_engine(9)
• struct ccp_cmd(9)

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Ok that's the whole page!! This one's sourced from ./include/linux and it's dated October 2026 — so yeah, future icon behavior fr fr 🌟 go forth and hash responsibly, ily 🫶💖