skcipher_all...tance_simple(9)

💅 skcipher_alloc_instance_simple(9) 💅

okay so first things first — welcome to the Kernel API Manual, bestie 🎀 this page is literally called skcipher_all...tance_simple(9) (yes the title is truncated like that, no I did not do it, the manual did 🙈) and it's gonna teach you how to spin up an instance for a simple block cipher mode. let's get into it ✨

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🌸 NAME 🌸

skcipher_alloc_instance_simple — allocate an instance of a simple block cipher mode, periodt 💅

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🦋 SYNOPSIS 🦋

struct skcipher_instance * skcipher_alloc_instance_simple (struct
crypto_template *tmpl , struct rtattr **tb );

like, that's the whole signature. she's an icon, she's a function, she returns a pointer to a struct skcipher_instance 👑

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✨ ARGUMENTS ✨

• tmpl — the template being instantiated 🧚 that's the thing you're bringing into existence, main character energy
• tb — the template parameters 🎀 the vibe check args, if you will

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💖 DESCRIPTION 💖

okay so what this does: it allocates an skcipher_instance for a simple block cipher mode of operation — think cbc or ecb, the classics 💅

here's the tea on what the instance context gets:

• it will have just a single crypto_spawn, and that spawn is for the underlying cipher 🫶 one spawn, no more, that's it
• the {min,max}_keysize, ivsize, blocksize, alignmask, and priority are all set from the underlying cipher 🔥

but — and this is the good part — those can all be overridden if needed 😌 so you're not locked in, you have options, you have range.

also:

• the tfm context defaults to skcipher_ctx_simple
• and default ->setkey, ->init, and ->exit methods are installed ✨

it's giving "batteries included but customizable." obsessed.

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⭐ RETURN ⭐

returns a pointer to the new instance, or an ERR_PTR 😭 (iykyk — check that thing before you use it, fr fr).

⚠️ heads up bestie: the caller still needs to register the instance. this function does not do that for you. the allocation is yours, the registration is also yours. no cap. 💀

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🔥 SEE ALSO 🔥

• Kernel file ./crypto/skcipher.c
• skcipher_walk_done(9)

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and that's the page!! mwah 💋 this little legend lives in ./crypto, dated October 2026, and it's filed under skcipher_all...tance_simple(9) — go forth and allocate responsibly, bestie 🌈👑🍓