asymmetric_..._v3_hashless(9)

💅 asymmetric_..._v3_hashless(9) — from the Kernel API Manual 🎀

okay bestie, so this is a page about a kernel function that lives in the Kernel API Manual, and honestly? it's giving "niche but iconic". the star of the show is asymmetric_verify_v3_hashless, and its whole personality is doing hashless signature verification on sigv3. no hash, no problem, periodt. ✨

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🌸 NAME 🌸

asymmetric_verify_v3_hashless — literally just use hashless signature verification on sigv3. that's it, that's the vibe. 💅

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🦋 SYNOPSIS 🦋

int asymmetric_verify_v3_hashless (struct key *key , const struct
       public_key *pk , const char *encoding , const char *sig , int siglen ,
       u8 algo , const u8 *digest );

like, seven whole arguments, she's high maintenance but she delivers 🫶

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✨ ARGUMENTS ✨

• key — the key you're using to verify that signature, bestie. heads up: the caller must free it, so don't leave it hanging 😭
• pk — the associated public key. this one must not be NULL, no cap, not even a little bit.
• encoding — the encoding that the key type uses. whatever that key type's whole deal is 🎀
• sig — the xattr signature. yes, the extended-attribute one 💖
• siglen — the length of that xattr signature. it must be at least sizeof(struct signature_v2_hdr) — too short and it's a no from her 🙈
• algo — the hash algorithm, typed as [enum hash_algo]. and listen, the caller must ensure it's a valid value — she trusts you, don't make it weird 💀
• digest — the file digest 🍓

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👑 DESCRIPTION 👑

so what actually happens? she creates an ima_file_id structure and then uses it for signature verification directly. that's the whole move. main character energy, no detours ✨

and like, this is exactly the vibe you want for ML-DSA in pure mode, for example 🔥 — yes that's a real use case and yes she ate.

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🧚 SEE ALSO 🧚

• the kernel file ./security/integrity/digsig_asymmetric.c — go read the source, iykyk 💜
• asymmetric_verify_common(9) — her sibling, also iconic 🌈

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ngl this one's short and sweet — but every arg matters, so pls don't skip the "caller must free it" part, your memory will thank you 😭🫶

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and that's the whole page, bestie! brought to you by ./security/integrity, dated October 2026 — mwah, slay, bye 💋🎀⭐