| crypto/x509 | Package x509 implements a subset of the X.509 standard. |
| encoding/json | Package json implements encoding and decoding of JSON as defined in RFC 7159. |
| encoding/pem | Package pem implements the PEM data encoding, which originated in Privacy Enhanced Mail. |
| 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/api/client | Package client implements a Go client for CFSSL API commands. |
| github.com/cloudflare/cfssl/auth | Package auth implements an interface for providing CFSSL authentication. |
| github.com/cloudflare/cfssl/config | Package config contains the configuration logic for CFSSL. |
| github.com/cloudflare/cfssl/helpers | Package helpers implements utility functionality common to many CFSSL packages. |
| github.com/cloudflare/cfssl/info | Package info contains the definitions for the info endpoint |
| github.com/cloudflare/cfssl/signer | Package signer implements certificate signature functionality for CFSSL. |
| github.com/cloudflare/cfssl/transport/core | Package core contains core definitions for the transport package, the most salient of which is likely the Identity type. |
| net | Package net provides a portable interface for network I/O, including TCP/IP, UDP, domain name resolution, and Unix domain sockets. |
| path/filepath | Package filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths. |