digsig_verify(9)

💖 digsig_verify(9) 💖

Okay bestie, this is from the Kernel API Manual, and the page name is digsig_verify(9) — we’re doing public-key digital signature verification and it’s giving kernel-crypto main character energy 🔥

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✨ NAME ✨

digsig_verify — digital signature verification with public key 👑

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🌸 SYNOPSIS 🌸

int digsig_verify (struct key *keyring , const char *sig , int siglen ,
       const char *data , int datalen );

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🎀 ARGUMENTS 🎀

• keyring — the keyring to search the key in 🔎
• sig — the digital signature, literally the signature itself 💅
• siglen — length of the signature
• data — the data
• datalen — length of the data

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💅 DESCRIPTION 💅

Returns 0 on success, -EINVAL otherwise 😭 periodt.

It verifies data integrity against a digital signature. Currently only RSA is supported 👑. Normally, the hash of the content is used as the data for this function, iykyk.

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🦋 SEE ALSO 🦋

Kernel file ./lib/digsig.c — go look, bestie 🫶

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Signed off from the ./lib corner of the kernel, source/version vibes dated October 2026, page digsig_verify(9) 💖✨🎀