Imports github.com/certifi/gocertifi github.com/github/smimesign/certstore github.com/github/smimesign/ietf-cms github.com/pborman/getopt/v2 github.com/pkg/errors golang.org/x/crypto/openpgp/packet golang.org/x/crypto/openpgp/s2k Standard library imports bytes crypto crypto/sha1 crypto/x509 encoding/asn1 encoding/hex encoding/pem fmt io os regexp strings sync time