| encoding/json | Package json implements encoding and decoding of JSON as defined in RFC 7159. |
| 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/cloudflare/cfssl/cli | Package cli provides the template for adding new cfssl commands |
| github.com/cloudflare/cfssl/cli/genkey | Package genkey implements the genkey command. |
| github.com/cloudflare/cfssl/config | Package config contains the configuration logic for CFSSL. |
| github.com/cloudflare/cfssl/csr | Package csr implements certificate requests for CFSSL. |
| github.com/cloudflare/cfssl/helpers | Package helpers implements utility functionality common to many CFSSL packages. |
| github.com/cloudflare/cfssl/selfsign | Package selfsign implements certificate selfsigning. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| time | Package time provides functionality for measuring and displaying time. |