sm4_crypt_block(9)

okay so bestie, this is sm4_crypt_block(9) from the Kernel API Manual — short page, main-character function, let’s get into it 💖✨

🌸 NAME 🌸

sm4_crypt_block — Encrypt or decrypt a single SM4 block 💅

Like, exactly one block. Not a whole stack of them. One block, iconic behavior, no cap.

✨ SYNOPSIS ✨

void sm4_crypt_block (const u32 *rk , u8 *out , const u8 *in );

💖 ARGUMENTS 💖

• rk — The rkey_enc for encrypt or rkey_dec for decrypt 🔐
• out — Buffer to store output data 📦
• in — Buffer containing the input data 🧚

🔥 SEE ALSO 🔥

• Kernel file ./include/crypto/sm4.h 🎀
• sm4_expandkey(9) 🦋

that’s the whole page, bestie — source/version: ./include/crypto, date: October 2026. mwah 💋✨