Error: secretOrPrivateKey must be an asymmetric key when using RS256

[roninaruka]

const token = Mux.JWT.signPlaybackId('some-playback-id');

when create token gettign error

Error: secretOrPrivateKey must be an asymmetric key when using RS256
    at Object.module.exports [as sign] (/home/chhayya/Documents/fitscopeV2/fitscopeV2_Backend/node_modules/.pnpm/jsonwebtoken@9.0.0/node_modules/jsonwebtoken/sign.js:124:22)
    at Function.signPlaybackId (/home/chhayya/Documents/fitscopeV2/fitscopeV2_Backend/node_modules/.pnpm/@mux+mux-node@7.3.1/node_modules/@mux/mux-node/src/utils/jwt.ts:155:16)
    at Function.sign (/home/chhayya/Documents/fitscopeV2/fitscopeV2_Backend/node_modules/.pnpm/@mux+mux-node@7.3.1/node_modules/@mux/mux-node/src/utils/jwt.ts:109:17)
    at /home/chhayya/Documents/fitscopeV2/fitscopeV2_Backend/src/routes/content/categories.ts:170:47
    at Array.map (<anonymous>)
    at /home/chhayya/Documents/fitscopeV2/fitscopeV2_Backend/src/routes/content/categories.ts:168:60
    at Array.map (<anonymous>)
    at Object.<anonymous> (/home/chhayya/Documents/fitscopeV2/fitscopeV2_Backend/src/routes/content/categories.ts:167:33)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
[ERROR] 13:10:37 Error: secretOrPrivateKey must be an asymmetric key when using RS256

[dylanjha]

@roninaruka do you have environment variables set:

process.env.MUX_SIGNING_KEY
process.env. MUX_PRIVATE_KEY

[roninaruka]

Thanks @dylanjha i have set
also use const token = Mux.JWT.sign('some-playback-id', { keyId: 'your key id', keySecret: 'your key secret' }) but same getting same error

[dylanjha]

Okay this is probably an issue with the keySecret.

Which way did you get your key:

• Created in the Mux Dashboard & copied to clipboard in the UI
• Created via the API
• Created in the Mux Dashboard & downloaded as .pem file

Can you try one of the first 2 options? Probably easiest if you just create in the dashboard and click "copy" to get the Base-64 encoded private key.

You can get to this screen from Settings > Signing Keys in the left nav and then click "Generate new key"

[roninaruka]

@dylanjha Thanks its working fine but one more question i have pass expiration in option like { expiration: ((new Date()).getTime() + 50).toString() } for 50 sec
but its not wokring
is anything wrong here ??

[dylanjha]

@roninaruka well, 50 seconds is probably too short (the expiration has to be at least longer than the duration of the video

I'm noticing that this should be documented better, but the expiration value gets passed into jwt.sign as the expiresIn value in this jsonwebtoken dependency

Values are like this:

• 50 (50 seconds)
• 50s (50 seconds)
• 7d (7 days) -- the default
• 4h (4 hours)

See here for the syntax

[dylanjha]

@roninaruka hope that clears it up. Lmk if you're still having issues.