tpm_get_random(9)

💖 tpm_get_random(9) — the kernel API manual, but make it cute 💖

okay so bestie, welcome to the tpm_get_random page from the Kernel API Manual ✨ this one is short and sweet: it's literally the function that asks your TPM for random bytes. no cap, that's the whole vibe. 🎀

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🌸 NAME 🌸

tpm_get_random — get random bytes from the TPM's RNG 🎲💫

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🦋 SYNOPSIS 🦋

int tpm_get_random (struct tpm_chip *chip , u8 *out , size_t max );

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✨ ARGUMENTS ✨

• chip — a struct tpm_chip instance, or NULL for the default chip 🫶 (yes, NULL is totally valid here, it just means "bestie, use the default one")
• out — the destination buffer where the random bytes go 🍓
• max — the max number of bytes to write to out 📏

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💅 RETURN 💅

the number of random bytes read, or a negative error value 😭 (so like, check it, fr fr)

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👑 SEE ALSO 👑

• Kernel file ./drivers/char/tpm/tpm-interface.c 📁
• tpm_calc_ordinal_duration(9)
• tpm_transmit(9)
• tpm_transmit_cmd(9)
• tpm_is_tpm2(9)
• tpm_pcr_read(9)
• tpm_pcr_extend(9)

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lowkey a whole friend group of TPM functions right there — go say hi to them too 💜

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and that's the page!! 🌈 this one came from the source/version line ./drivers/char/tpm and it's dated October 2026 ⭐ — so yeah, future vibes only, periodt 💀✨ hope that helped bestie, iykyk 🧚💖