How can I receive the header and footer in getting the public key from KMS?

Question

I'm retrieving a public key from KMS using the javascript SDK. The result has the property `PublicKey` which is of type `Uint8Array`. I'm verifying a token using the `jsonwebtoken` library. I'm not verifying the token with the KMS SDK because I'm implementing a microservice architecture and the signing and verification happen in different services so my verification code does not have access to the `Signature` returned by the `sign` method on the KMS client.   
  
Back to the KMS client, the result has the property `PublicKey` which is of type `Uint8Array`. This can be converted to a string with the following code `Buffer.from(result.PublicKey).toString('base64')`. This does not follow a verifiable format however.  
  
I'm expecting to see the string formatted as `'-----BEGIN RSA PUBLIC KEY-----foo foo foo'` with the appropriate header and footer. When I parse the public key, however, I'm only receiving the body and not the header and footer of the public key.  
  
How can I receive the header and footer in getting the public key from KMS?  
  
Edited by: kylewright on Sep 29, 2021 4:52 PM

Answer

I've found a workaround for this problem.  
  
`const publicKey = '-----BEGIN PUBLIC KEY-----
' _ kmsPublicKey.replace(/(.{64})/g, '$&' _ '
' ) + '
-----END PUBLIC KEY-----';`  
  
Yes, it isn't very pretty, but it gets the job done.  
  
KMS team, can there be a option to retrieve the public key with the appropriate header and footer on the `getPublicKey` method?

How can I receive the header and footer in getting the public key from KMS?

Relevant content