Error: error:0909006C:PEM routines:get_name:no start line - node

Question

I have cloned this repo (https://github.com/docusign/code-examples-node) and believe I have entered all required keys and codes. But, when I try to authenticate with JWT I get this error:

    at Sign.sign (internal/crypto/sig.js:105:29)
    at Object.sign (C:\Users\BrownJ3\Documents\repos\code-examples-node\node_modules\jwa\index.js:152:45)
    at Object.jwsSign [as sign] (C:\Users\BrownJ3\Documents\repos\code-examples-node\node_modules\jws\lib\sign-stream.js:32:24)
    at Object.module.exports [as sign] (C:\Users\BrownJ3\Documents\repos\code-examples-node\node_modules\docusign-esign\node_modules\jsonwebtoken\sign.js:189:16)
    at generateAndSignJWTAssertion (C:\Users\BrownJ3\Documents\repos\code-examples-node\node_modules\docusign-esign\src\ApiClient.js:62:16)
    at exports.requestJWTUserToken (C:\Users\BrownJ3\Documents\repos\code-examples-node\node_modules\docusign-esign\src\ApiClient.js:890:19)
    at _DsJwtAuth._getToken [as getToken] (C:\Users\BrownJ3\Documents\repos\code-examples-node\lib\DSJwtAuth.js:85:33)
    at log (C:\Users\BrownJ3\Documents\repos\code-examples-node\lib\DSJwtAuth.js:174:33)
    at _DsJwtAuth.DsJwtAuth.login (C:\Users\BrownJ3\Documents\repos\code-examples-node\lib\DSJwtAuth.js:184:5)
    at commonControllers.login (C:\Users\BrownJ3\Documents\repos\code-examples-node\lib\commonControllers.js:36:16) {
  library: 'PEM routines',
  function: 'get_name',
  reason: 'no start line',
  code: 'ERR_OSSL_PEM_NO_START_LINE```

Answer 1

What this typically means is that the PEM file is missing the indicator that the key portion has begun.

PEM files are structured like this:

Intitial Data to be processed

-----Begin <Type>-----

Key Information

-----End <Type>-----

The standard for these files can be found here: https://www.rfc-editor.org/rfc/rfc7468

Can you confirm if the -----Begin / End lines are present are present in the PEM file you're using? Please don't post the actual file here, if they are present in the PEM we're going to want to have you open a support case with DocuSign so we keep any necessary private data for troubleshooting private.