NVWRITE(1)

👑 NVWRITE — like, the manual page, bestie

okay so this is the manual page for nvwrite, and it lives in the User Commands section of the manual (that's the (1) bit, iykyk). It's a whole little program and it's out here doing the absolute most. Let's get into it 💅

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✨ NAME ✨

nvwrite — Runs TPM2_NV_Write

that's it. that's the name section. short, sweet, iconic. 🎀

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🌸 DESCRIPTION 🌸

First things first, and this is a real quote so brace yourself: --version-string=v1045 is not a valid option. Noted. Logged. Respectfully, no. 💀

Now. nvwrite — Runs TPM2_NV_Write.

And here's the whole usage vibe, exactly as it comes:

       nvwrite

       Runs TPM2_NV_Write

              [-hia hierarchy authorization (o, p)(default index
              authorization)] -ha NV index handle -pwdn password for NV index
              (default empty) [-ic data string] [-if data file] [-id data
              values, pinPass and pinLimit (4 bytes each)]

              if none is specified, a 0 byte write occurs -id is normally used
              for pin pass or pin fail indexes

so let's break those flags down one by one, no skipping, we're being thorough girlies today 🫶

• -hia — hierarchy authorization, and it takes (o, p), with the default being index authorization
• -ha — the NV index handle. this one is not optional, it's giving required main character energy 👑
• -pwdn — password for the NV index, and the default is empty
• -ic — data string (optional)
• -if — data file (optional)
• -id — data values, pinPass and pinLimit, and each of those is 4 bytes (optional)

and a very important lil note, so listen up: if none of those is specified, a 0 byte write occurs. Also, -id is normally used for pin pass or pin fail indexes. that's the whole lore. 🌈

Then there's this:

       -off offset (default 0)

• -off — offset, and the default is 0 ⭐

and then sessions:

       -se[0-2] session handle / attributes (default PWAP)

• -se[0-2] — session handle / attributes, default is PWAP
  • 01 — continue

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okay bestie, and now for the plot twist: the page literally says all of that again. same block, twice, back to back. i am not making this up, i am not editorialising, i am simply reporting the facts 🙈

So here it is, the second round, verbatim energy:

--version is not a valid option. again. still not valid. the audacity. 💀

nvwrite — Runs TPM2_NV_Write.

       nvwrite

       Runs TPM2_NV_Write

              [-hia hierarchy authorization (o, p)(default index
              authorization)] -ha NV index handle -pwdn password for NV index
              (default empty) [-ic data string] [-if data file] [-id data
              values, pinPass and pinLimit (4 bytes each)]

              if none is specified, a 0 byte write occurs -id is normally used
              for pin pass or pin fail indexes

and the flags, one more time, because repetition is a love language apparently:

• -hia — hierarchy authorization, (o, p), default is index authorization
• -ha — NV index handle
• -pwdn — password for NV index, default empty
• -ic — data string
• -if — data file
• -id — data values, pinPass and pinLimit, 4 bytes each

reminder, since the page is reminding us: if none of them is specified, a 0 byte write occurs. and -id is normally used for pin pass or pin fail indexes. 🍓

       -off offset (default 0)

• -off — offset, default 0

       -se[0-2] session handle / attributes (default PWAP)

• -se[0-2] — session handle / attributes, default PWAP
  • 01 — continue

periodt. that's the section. 💖

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🦋 SEE ALSO 🦋

The full documentation for nvwrite is maintained as a Texinfo manual. So if the info and nvwrite programs are properly installed at your site, then this command:

       info nvwrite

should give you access to the complete manual. go get your full docs, you deserve them 🧚✨

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and that's the whole page, bestie — this manual came from nvwrite, dated July 2017, and it's filed under NVWRITE(1) in the User Commands manual. mwah, go write some NV. 💜