Wowza Community

Does Google Widevine license server create keys for encryption using key rotation?

I intend to serve my content using Google Widevine, and use the key rotation feature.
Does Google Widevine License server also generate keys? I understand that the license server/ key management server from Google Widevine provides the encryption key to:

Packager (for encryption of content) and
Client (in the form of license, for decryption)

However, to deliver encrypted content to my client devices, can Widevine license server also generate keys for my content and deliver them to packager? Or do I have to generate the keys myself and host the keys on license server?

Any help would be highly appreciated!