aescfb_decrypt(9)

💅 aescfb_decrypt 💅

okay so bestie, welcome to the aescfb_decrypt(9) page from the Kernel API Manual — yes it's real, yes it's in the kernel, and yes it's lowkey iconic ✨

🌸 NAME 🌸

aescfb_decrypt — perform AES-CFB decryption on a block of data 🫶

like, that's the whole vibe: ciphertext goes in, plaintext comes out, the math girlies handle the rest 🔥

✨ SYNOPSIS ✨

void aescfb_decrypt (const struct aes_enckey *key , u8 *dst , const u8 *src , int len , const u8 iv[AES_BLOCK_SIZE] );

no cap, that's the exact signature — copy it character for character or the compiler WILL come for you 💀

🎀 ARGUMENTS 🎀

• key — the AES-CFB key schedule 💖 like the whole setup of round keys, already prepared, don't come at it with a raw password, it's not that kind of function.
• dst — pointer to the plaintext output buffer 🦋 this is where the decrypted goodies land.
• src — pointer to the ciphertext 🌈 and here's the slay: it may equal dst for decryption in place. same pointer, both jobs, main character energy fr fr.
• len — the size in bytes of the plaintext and ciphertext 📏 yes both, they're the same length, that's just how CFB works bestie.
• iv — the initialization vector (IV) to use for this block of data 🎀 typed as const u8 iv[AES_BLOCK_SIZE], so it's a whole AES_BLOCK_SIZE-sized array, mwah 💅

👑 SEE ALSO 👑

• the kernel file ./lib/crypto/aescfb.c — go read the source, it's giving transparency 💜
• aescfb_encrypt(9) — the encrypt twin, the other half of the duo, check it out too 🌸

bestie reminder: src and dst being allowed to be the same pointer is literally stated in the args, so in-place decryption is the vibe — but don't go inventing other behaviours, that's all the page says 🙈

and that's the page!! 🧚 from ./lib/crypto, dated October 2026 — periodt, stay decrypted, ily 💖⭐