# Shared PGP Certificate Directory for Java [](https://javadoc.io/doc/org.pgpainless/pgp-cert-d-java) [](https://search.maven.org/artifact/org.pgpainless/pgp-cert-d-java) Backend-agnostic implementation of the [Shared PGP Certificate Directory Specification](https://sequoia-pgp.gitlab.io/pgp-cert-d/). This module implements the non-OpenPGP parts of the spec, e.g. locating the directory, resolving certificate file paths, locking the directory for writes etc. To get a useful implementation, a backend implementation such as `pgpainless-cert-d` is required, which needs to provide support for reading and merging certificates. `pgp-cert-d-java` can be used as an implementation of `pgp-certificate-store`. Note: This is a library module. For a command line interface, see [pgpainless-cert-d-cli](https://github.com/pgpainless/cert-d-pgpainless/tree/main/pgpainless-cert-d-cli).