Imports github.com/google/certificate-transparency-go/tls github.com/google/certificate-transparency-go/x509 github.com/google/certificate-transparency-go github.com/google/certificate-transparency-go/x509util github.com/pkg/errors Standard library imports crypto/x509/pkix crypto/rsa crypto/ed25519 crypto/ecdsa crypto/dsa encoding/asn1 bytes crypto/x509 encoding/base64 fmt math/big net net/url strconv time