Implement authenticated encryption and decryption using AES in OCB mode, as described in RFC7253.

Specification: https://wicg.github.io/webcrypto-modern-algos/#aes-ocb

There are six operations of AES-OCB to implement:

• encrypt script: Implement encrypt and decrypt operations of AES-OCB #41829
• decrypt script: Implement encrypt and decrypt operations of AES-OCB #41829
• generateKey script: Implement generate key operation of AES-OCB #41822
• importKey script: Implement import key operation of AES-OCB #41791
• exportKey script: Implement export key operation of AES-OCB #41813
• get key length script: Implement encrypt and decrypt operations of AES-OCB #41829