crypto_akcip...sync_decrypt(9)

💅 NAME 💅

crypto_akcipher_sync_decrypt — Invoke public key decrypt operation ✨

okay so real talk, this whole page lives in the Kernel API Manual (section 9, kernel-API girlies rise 🫶), and this one function is your go-to when you need the actual public key decrypt to happen. no cap.

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✨ SYNOPSIS ✨

int crypto_akcipher_sync_decrypt (struct crypto_akcipher *tfm , const
void *src , unsigned int slen , void *dst , unsigned int dlen );

look at her. five params, one int return, absolutely serving 🎀

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🎀 ARGUMENTS 🎀

• tfm — your AKCIPHER tfm handle, and bestie it has to be one you got from crypto_alloc_akcipher. no shortcuts, no homemade handles 💅
• src — the source buffer, aka where the ciphertext situation is living
• slen — the source length. yes you have to tell her how long src is, she's not a mind reader 😭
• dst — the destination obuffer 🙈 (that spelling is straight from the source and honestly it's canon now)
• dlen — the destination length

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🦋 DESCRIPTION 🦋

So what does she actually do? The function invokes the specific public key decrypt operation for a given public key algorithm. that's it, that's the whole vibe 🌸

like, it's the sync decrypt entry point — you hand her a tfm, a source buffer with a length, a destination buffer with a length, and she routes the decrypt through whatever public key algorithm that tfm is repping. main character energy, lowkey 🔥

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🌈 RETURN 🌈

• Output length on success 🎉 (not just 0/1, she gives you the actual length, she's generous like that)
• an error code in case of error 💀

so like, check your return values, bestie. fr fr.

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👑 SEE ALSO 👑

• Kernel file ./include/crypto/akcipher.h
• struct akcipher_request(9)
• struct crypto_akcipher(9)
• struct akcipher_alg(9)
• Generic Public Key Cipher API(9)
• crypto_alloc_akcipher(9)
• crypto_free_akcipher(9)
• akcipher_request_alloc(9)
• akcipher_request_free(9)
• akcipher_request_set_callback(9)
• akcipher_request_set_crypt(9)
• crypto_akcipher_maxsize(9)
• crypto_akcipher_encrypt(9)
• crypto_akcipher_decrypt(9)
• crypto_akcipher_sync_encrypt(9)
• crypto_akcipher_set_pub_key(9)
• crypto_akcipher_set_priv_key(9)

the whole friend group, literally obsessed with all of them 🫶

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ok that's the page!! source is ./include/crypto, dated October 2026, and it's crypto_akcip...sync_decrypt(9) in case you need to cite her. mwah, go decrypt something iconic 💖🧚‍♀️⭐