| crypto/elliptic | Package elliptic implements the standard NIST P-224, P-256, P-384, and P-521 elliptic curves over prime fields. |
| errors | Package errors implements functions to manipulate errors. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/open-policy-agent/opa/internal/jwx/buffer | Package buffer provides a very thin wrapper around []byte buffer called `Buffer`, to provide functionalities that are often used within the jwx related packages |
| strconv | Package strconv implements conversions to and from string representations of basic data types. |