crypto_sig_maxsize(9)

💖 NAME 💖

okay so bestie, this is crypto_sig_maxsize(9) straight from the Kernel API Manual — and it does exactly what it says: crypto_sig_maxsize — get the maximum signature size. slay. 💅

✨ SYNOPSIS ✨

it's giving:

unsigned int crypto_sig_maxsize (struct crypto_sig *tfm );

🎀 ARGUMENTS 🎀

• tfm — the signature tfm handle, allocated with crypto_alloc_sig. that's the whole argument, bestie 🫶

🦋 DESCRIPTION 🦋

So this function returns the maximum signature size in bytes. iconic behavior, honestly ✨

But listen: it assumes that the key is already set in the transformation. If you call this function without a setkey, or with a failed setkey, you may end up in a NULL dereference. not me warning you dramatically, but 😭💀 that is a real yikes, so set your key first, fr fr.

🌈 SEE ALSO 🌈

• Kernel file ./include/crypto/sig.h
• struct crypto_sig(9)
• struct sig_alg(9)
• Generic Public Key Signature API(9)
• crypto_alloc_sig(9)
• crypto_free_sig(9)
• crypto_sig_keysize(9)
• crypto_sig_digestsize(9)
• crypto_sig_sign(9)
• crypto_sig_verify(9)
• crypto_sig_set_pubkey(9)
• crypto_sig_set_privkey(9)

💖 and that's the vibe check, bestie — source/version: ./include/crypto, dated October 2026, signing off as crypto_sig_maxsize(9) 🎀✨💅