| The public/private key pairs were generated with the following commands: |
| openssl genrsa -out private_key.pem 2048 |
| openssl rsa -in private_key.pem -pubout -out public_key.pem |
| The payload.json file contains randomly generated base64url encoded sha256 |
| hashes for a set of file paths. |
| The signature was generated by: |
| 1) Take the contents of payload.json and base64url encode them: |
| cat payload.json | tr -d \\n | base64 -w0 | tr / _ | tr + \- | tr -d '=' > payload_encoded.txt |
| 2) Put the contents of payload_encoded.txt into the "payload" field of |
| 3) Copy the contents of the "protected" field (the one with {"kid": |
| "webstore"}) from verified_contents.json into protected.txt. |
| 4) Concatenate the "protected" and "payload" fields with a '.' separator. |
| echo -n '.' | cat protected.txt - payload_encoded.txt > signature_input.txt |
| tr -d \\n < signature_input.txt | openssl dgst -sha256 -sign private_key.pem -binary | base64 -w0 | tr / _ | tr + \- | tr -d '=' > signature.txt |
| 6) Put the contents of signature.txt into the "signature" field in |