`lightning-hsmtool` failed using checkhsm unless password is type as passphrase

[MSimeZ]

CONCERNING #8837

During the generatehsm function, when you insert the passphrase, it appears as if the input is also saved as password, so the checkhsm function works right only if you insert the same input for both. This is in contrast with the expected behaviour of this function, since the password and the passphrase are both optional and should be allowed to be set independently from one another.

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STEP TO REPRODUCE THE ISSUE

1 - Run a lightning node using lightningd/lightningd --daemon

2 - Create HSM using ./tools/lightning-hsmtool generatehsm

3a - Don't set any password

3b - Insert any word when the passphrase is asked (no password should be set):

4 - Run ./tools/lightning-hsmtool checkhsm /tmp/current/hsm_secret

5a - Skip inputting password (if not set, it shouldn't be requested)

5b - Enter the passphrase

6 - Insert the correct passphrase and the corrects 12 words

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Expected result

6 - Log shows OK

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Actual behavior

3 - The user is prompted only once and the input is saved for both password and passphrase

Introduce your BIP39 word list separated by space (at least 12 words):
abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about
Warning: remember that different passphrases yield different bitcoin wallets.
If left empty, no password is used (echo is disabled).
Enter your passphrase: 

5a - Password is requested. Execution fails for every input different from the passphrase

[ekzyis]

The issue description confused me. I think the "Steps to reproduce the issue" are mixed with the expected results. I also think Step 1 isn't needed.