SINGLE BLOCK CIPHER API(9)

💅 SINGLE BLOCK CIPHER API 💅

okay bestie, welcome to the Single Block Cipher API — straight out of your fave Kernel API Manual ✨ this one's short but she's iconic, so pay attention 🫶

🌸 the vibe check (aka DESCRIPTION)

so the single block cipher API is literally what you use with the ciphers of type CRYPTO_ALG_TYPE_CIPHER — you'll see them listed as type "cipher" in /proc/crypto if you go peek 👀 (go peek, it's giving main character energy).

using the single block cipher API calls, you can implement operations with the basic cipher primitive 💅 and bestie, note this: these cipher primitives exclude any block chaining operations — including IV handling. no chaining, no IVs, not here, not today 🚫✨

the whole purpose of this API is to support the implementation of templates or other concepts that only need to perform the cipher operation on one block at a time. templates invoke the underlying cipher primitive block-wise and then process either the input or the output data of those cipher operations 🔥 one block, in and out, that's the whole gig, periodt.

no cap — if you came here looking for chaining or IV handling, this is not the function you're looking for, go find her elsewhere 😭

✨ SEE ALSO ✨

• Kernel file ./include/crypto/internal/cipher.h
• crypto_alloc_cipher(9)
• crypto_free_cipher(9)
• crypto_has_cipher(9)
• crypto_cipher_blocksize(9)
• crypto_cipher_setkey(9)
• crypto_cipher_encrypt_one(9)
• crypto_cipher_decrypt_one(9)

and that's the whole page, bestie 🎀 she lives in ./include/crypto/internal and she's stamped October 2026 — go read the SEE ALSO girls, they're all linked and they all ate 💖🦋💀