Imports github.com/unidoc/pkcs7 github.com/unidoc/timestamp Imports in module “bitbucket.org/shenghui0779/gopdf” bitbucket.org/shenghui0779/gopdf/core bitbucket.org/shenghui0779/gopdf/model bitbucket.org/shenghui0779/gopdf/model/mdp bitbucket.org/shenghui0779/gopdf/model/sigutil Standard library imports bytes crypto crypto/rand crypto/rsa crypto/x509 crypto/x509/pkix encoding/asn1 errors fmt hash math/big time