crypto_krb5_how_much_buffer(9)

✨ NAME ✨

okay so this is crypto_krb5_how_much_buffer(9) from the Kernel API Manual, and bestie it does exactly one iconic thing: work out how much buffer is required for an amount of data 💅✨

🌸 SYNOPSIS 🌸

size_t crypto_krb5_how_much_buffer (const struct krb5_enctype *krb5 ,
enum krb5_crypto_mode mode , size_t data_size , size_t *_offset );

🎀 ARGUMENTS 🎀

• krb5 — the encoding to use ✨
• mode — the mode in which to operate (checksum/encrypt) 🫶
• data_size — how much data we want to allow for 💖
• _offset — where to place the offset into the buffer 🎀

💅 DESCRIPTION 💅

okay so this function calculates how much buffer space is required to wrap a given amount of data. it allows for a confounder, padding and checksum as appropriate — no cap, that’s the whole vibe check 🦋

the amount of buffer required is returned, and the offset into the buffer at which the data will start is placed in *_offset. literally that’s it, and it ate 🔥

🦋 SEE ALSO 🦋

• Kernel file ./crypto/krb5/krb5_api.c
• crypto_krb5_find_enctype(9)
• crypto_krb5_how_much_data(9)
• crypto_krb5_where_is_the_data(9)
• crypto_krb5_check_data_len(9)
• crypto_krb5_prepare_encryption(9)
• crypto_krb5_prepare_checksum(9)
• crypto_krb5_encrypt(9)
• crypto_krb5_decrypt(9)
• crypto_krb5_get_mic(9)
• crypto_krb5_verify_mic(9)

source/version: ./crypto/krb5 🫶 date: October 2026 ✨ stay hydrated bestie, this page is done 💜🧚