ghash_update(9)

💅 ghash_update(9) 💅

okay so this page is straight out of the Kernel API Manual, and it’s here to explain how to feed your GHASH context some message data ✨

🌸 NAME 🌸

ghash_update — Update a GHASH context with message data 💖

🦋 SYNOPSIS 🦋

void ghash_update (struct ghash_ctx *ctx , const u8 *data , size_t len
       );

💖 ARGUMENTS 💖

• ctx — the context you’re updating; it must have been initialized already, no cap 💅
• data — the message data, periodt 🎀
• len — the data length in bytes. It doesn’t need to be block-aligned — slay, no alignment stress ✨

bestie note: ctx must have been initialized. That part is not optional 🫶

🧚 DESCRIPTION 🧚

This can be called any number of times — literally any number, bestie. That’s the whole tea ☕👑

🌈 CONTEXT 🌈

Any context. That’s it. That’s the vibe check 🦋

👑 SEE ALSO 👑

Kernel file ./include/crypto/gf128hash.h — and here’s the full squad, bestie:

• struct polyval_elem(9)
• struct ghash_key(9)
• struct polyval_key(9)
• struct ghash_ctx(9)
• struct polyval_ctx(9)
• ghash_preparekey(9)
• polyval_preparekey(9)
• ghash_init(9)
• polyval_init(9)
• polyval_import_blkaligned(9)
• polyval_export_blkaligned(9)
• polyval_update(9)
• ghash_final(9)
• polyval_final(9)
• ghash(9)
• polyval(9)

mwah 💋 this page comes from ./include/crypto, dated October 2026, and it’s ghash_update(9) signing off — stay crypto-cute, bestie 🫶✨