crypto_aead_encrypt(9)

💜 crypto_aead_encrypt(9) — Kernel API Manual, but make it make sense

okay bestie, so this one lives in the Kernel API Manual and it's called crypto_aead_encrypt — say that three times fast, i can't 😭. it's the "turn your plaintext into ciphertext" girlie, and she's honestly kind of iconic. let's get into it 🎀

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✨ NAME ✨

crypto_aead_encrypt — encrypt plaintext. that's it, that's the whole vibe 💅

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🌸 SYNOPSIS 🌸

int crypto_aead_encrypt (struct aead_request *req );

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🦋 ARGUMENTS 🦋

• req — a reference to the aead_request handle that's holding literally all the info needed to actually perform the cipher operation. like, it's the main character carrying everything, we love a prepared queen 👑

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🔥 DESCRIPTION 🔥

so you're encrypting plaintext data using the aead_request handle. that data structure — and the way you fill it with data — gets discussed over in the aead_request_* functions, so go read those if you need the tea ☕

IMPORTANT NOTE 🚨 bestie pls read this one. the encryption operation is the thing that creates the authentication data / tag. that data gets concatenated with the created ciphertext. so the ciphertext memory size is the given number of block cipher blocks + the size defined by the crypto_aead_setauthsize invocation. the caller must ensure that sufficient memory is available for the ciphertext and the authentication tag. no cap, if you skimp on the memory you're gonna have a bad time 😭

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⭐ RETURN ⭐

• 0 if the cipher operation was successful 🎉
• < 0 if an error occurred 💀

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🌈 SEE ALSO 🌈

• Kernel file ./include/crypto/aead.h
• Authenticated Encryption With Associated Data (AEAD) Cipher API(9)
• struct aead_request(9)
• struct aead_alg(9)
• crypto_alloc_aead(9)
• crypto_free_aead(9)
• crypto_has_aead(9)
• crypto_aead_ivsize(9)
• crypto_aead_authsize(9)
• crypto_aead_blocksize(9)
• crypto_aead_setkey(9)
• crypto_aead_setauthsize(9)
• crypto_aead_decrypt(9)
• Asynchronous AEAD Request Handle(9)
• crypto_aead_reqsize(9)
• aead_request_set_tfm(9)
• aead_request_alloc(9)
• aead_request_free(9)
• aead_request_set_callback(9)
• aead_request_set_crypt(9)
• aead_request_set_ad(9)

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okay that's the whole page, you ate that 🫶 this one's sourced from ./include/crypto, dated October 2026, and it's crypto_aead_encrypt(9) — go forth and encrypt responsibly, mwah 💖✨🧚