Imports github.com/cloudflare/cfssl/errors github.com/cloudflare/cfssl/helpers github.com/cloudflare/cfssl/log github.com/jmhodges/clock golang.org/x/crypto/ocsp Standard library imports bytes crypto crypto/sha256 crypto/x509 crypto/x509/pkix encoding/base64 fmt io/ioutil net/http net/url regexp strconv strings time