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secure-boot-otp-provisioning: Reword the README.md
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Change the TUI method description according to the latest Kconfig
wordings.

Meanwhile make the third key generation not optional, to trim the
operation branches.

Signed-off-by: Baocheng Su <[email protected]>
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BaochengSu committed Jan 2, 2024
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5 changes: 2 additions & 3 deletions recipes-bsp/secure-boot-otp-provisioning/README.md
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Expand Up @@ -22,8 +22,7 @@ the second keys is leaked as well, user can switch to use this key.
```shell
openssl req -x509 -newkey rsa:4096 -keyout custMpk.pem -nodes -outform pem -out custMpk.crt -sha256
openssl req -x509 -newkey rsa:4096 -keyout custSmpk.pem -nodes -outform pem -out custSmpk.crt -sha256
# optional the third key
#openssl req -x509 -newkey rsa:4096 -keyout custBmpk.pem -nodes -outform pem -out custBmpk.crt -sha256
openssl req -x509 -newkey rsa:4096 -keyout custBmpk.pem -nodes -outform pem -out custBmpk.crt -sha256
```

> :warning:
Expand Down Expand Up @@ -155,7 +154,7 @@ Above options could also be achieved by:

Then

- select `Firmware image for PG2 devices` as the `Image type`
- select `Firmware images` as the `Image type`
- check `Secure boot` and `OTP provisioning` in `Image features`
- select among `OTP provisioning command type`

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