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---
stage: Package
group: Package Registry
info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/product/ux/technical-writing/#assignments
---
# Supported package functionality
The GitLab Package Registry supports different functionalities for each package type. This support includes publishing
and pulling packages, request forwarding, managing duplicates, and authentication.
## Publishing packages **(FREE ALL)**
Packages can be published to your project, group, or instance.
| Package type | Project | Group | Instance |
|-------------------------------------------------------|---------|-------|----------|
| [Maven (with `mvn`)](../maven_repository/index.md) | Y | N | N |
| [Maven (with `gradle`)](../maven_repository/index.md) | Y | N | N |
| [Maven (with `sbt`)](../maven_repository/index.md) | N | N | N |
| [npm](../npm_registry/index.md) | Y | N | N |
| [NuGet](../nuget_repository/index.md) | Y | N | N |
| [PyPI](../pypi_repository/index.md) | Y | N | N |
| [Generic packages](../generic_packages/index.md) | Y | N | N |
| [Terraform](../terraform_module_registry/index.md) | Y | N | N |
| [Composer](../composer_repository/index.md) | N | Y | N |
| [Conan](../conan_repository/index.md) | Y | N | Y |
| [Helm](../helm_repository/index.md) | Y | N | N |
| [Debian](../debian_repository/index.md) | Y | N | N |
| [Go](../go_proxy/index.md) | Y | N | N |
| [Ruby gems](../rubygems_registry/index.md) | Y | N | N |
## Pulling packages **(FREE ALL)**
Packages can be pulled from your project, group, or instance.
| Package type | Project | Group | Instance |
|-------------------------------------------------------|---------|-------|----------|
| [Maven (with `mvn`)](../maven_repository/index.md) | Y | Y | Y |
| [Maven (with `gradle`)](../maven_repository/index.md) | Y | Y | Y |
| [Maven (with `sbt`)](../maven_repository/index.md) | Y | Y | Y |
| [npm](../npm_registry/index.md) | Y | Y | Y |
| [NuGet](../nuget_repository/index.md) | Y | Y | N |
| [PyPI](../pypi_repository/index.md) | Y | Y | N |
| [Generic packages](../generic_packages/index.md) | Y | N | N |
| [Terraform](../terraform_module_registry/index.md) | N | Y | N |
| [Composer](../composer_repository/index.md) | Y | Y | N |
| [Conan](../conan_repository/index.md) | Y | N | Y |
| [Helm](../helm_repository/index.md) | Y | N | N |
| [Debian](../debian_repository/index.md) | Y | N | N |
| [Go](../go_proxy/index.md) | Y | N | Y |
| [Ruby gems](../rubygems_registry/index.md) | Y | N | N |
## Forwarding requests **(PREMIUM ALL)**
Requests for packages not found in your GitLab project are forwarded to the public registry. For example, Maven Central, npmjs, or PyPI.
| Package type | Supports request forwarding |
|-------------------------------------------------------|-----------------------------|
| [Maven (with `mvn`)](../maven_repository/index.md) | [Yes (disabled by default)](../../../administration/settings/continuous_integration.md#maven-forwarding) |
| [Maven (with `gradle`)](../maven_repository/index.md) | [Yes (disabled by default)](../../../administration/settings/continuous_integration.md#maven-forwarding) |
| [Maven (with `sbt`)](../maven_repository/index.md) | [Yes (disabled by default)](../../../administration/settings/continuous_integration.md#maven-forwarding) |
| [npm](../npm_registry/index.md) | [Yes](../../../administration/settings/continuous_integration.md#npm-forwarding) |
| [NuGet](../nuget_repository/index.md) | N |
| [PyPI](../pypi_repository/index.md) | [Yes](../../../administration/settings/continuous_integration.md#pypi-forwarding) |
| [Generic packages](../generic_packages/index.md) | N |
| [Terraform](../terraform_module_registry/index.md) | N |
| [Composer](../composer_repository/index.md) | N |
| [Conan](../conan_repository/index.md) | N |
| [Helm](../helm_repository/index.md) | N |
| [Debian](../debian_repository/index.md) | N |
| [Go](../go_proxy/index.md) | N |
| [Ruby gems](../rubygems_registry/index.md) | N |
## Deleting packages
When package requests are forwarded to a public registry, deleting packages can
be a [dependency confusion vulnerability](https://medium.com/@alex.birsan/dependency-confusion-4a5d60fec610).
If a system tries to pull a deleted package, the request is forwarded to the public
registry. If a package with the same name and version is found in the public registry, that package
is pulled instead. There is a risk that the package pulled from the registry might not be
what is expected, and could even be malicious.
To reduce the associated security risks, before deleting a package you can:
- Verify the package is not being actively used.
- Disable request forwarding:
- Instance administrators can disable forwarding in the [**Continuous Integration** section](../../../administration/settings/continuous_integration.md#package-registry-configuration) of the Admin Area.
- Group owners can disable forwarding in the **Packages and Registries** section of the group settings.
## Importing packages from other repositories
You can use GitLab pipelines to import packages from other repositories, such as Maven Central or Artifactory with the [package importer tool](https://gitlab.com/gitlab-org/ci-cd/package-stage/pkgs_importer).
| Package type | Importer available? |
|-------------------------------------------------------|---------------------|
| [Maven (with `mvn`)](../maven_repository/index.md) | Y |
| [Maven (with `gradle`)](../maven_repository/index.md) | Y |
| [Maven (with `sbt`)](../maven_repository/index.md) | Y |
| [npm](../npm_registry/index.md) | Y |
| [NuGet](../nuget_repository/index.md) | Y |
| [PyPI](../pypi_repository/index.md) | Y |
| [Generic packages](../generic_packages/index.md) | N |
| [Terraform](../terraform_module_registry/index.md) | N |
| [Composer](../composer_repository/index.md) | N |
| [Conan](../conan_repository/index.md) | N |
| [Helm](../helm_repository/index.md) | N |
| [Debian](../debian_repository/index.md) | N |
| [Go](../go_proxy/index.md) | N |
| [Ruby gems](../rubygems_registry/index.md) | N |
## Allow or prevent duplicates **(FREE ALL)**
By default, the GitLab package registry either allows or prevents duplicates based on the default of that specific package manager format.
| Package type | Duplicates allowed? |
|-------------------------------------------------------|---------------------|
| [Maven (with `mvn`)](../maven_repository/index.md) | Y (configurable) |
| [Maven (with `gradle`)](../maven_repository/index.md) | Y (configurable) |
| [Maven (with `sbt`)](../maven_repository/index.md) | Y (configurable) |
| [npm](../npm_registry/index.md) | N |
| [NuGet](../nuget_repository/index.md) | Y |
| [PyPI](../pypi_repository/index.md) | N |
| [Generic packages](../generic_packages/index.md) | Y (configurable) |
| [Terraform](../terraform_module_registry/index.md) | N |
| [Composer](../composer_repository/index.md) | N |
| [Conan](../conan_repository/index.md) | N |
| [Helm](../helm_repository/index.md) | Y |
| [Debian](../debian_repository/index.md) | Y |
| [Go](../go_proxy/index.md) | N |
| [Ruby gems](../rubygems_registry/index.md) | Y |
## Authentication tokens **(FREE ALL)**
GitLab tokens are used to authenticate with the GitLab Package Registry.
The following tokens are supported:
| Package type | Supported tokens |
|-------------------------------------------------------|------------------------------------------------------------------------|
| [Maven (with `mvn`)](../maven_repository/index.md) | Personal access, job tokens, deploy (project or group), project access |
| [Maven (with `gradle`)](../maven_repository/index.md) | Personal access, job tokens, deploy (project or group), project access |
| [Maven (with `sbt`)](../maven_repository/index.md) | Personal access, job tokens, deploy (project or group), project access |
| [npm](../npm_registry/index.md) | Personal access, job tokens, deploy (project or group), project access |
| [NuGet](../nuget_repository/index.md) | Personal access, job tokens, deploy (project or group), project access |
| [PyPI](../pypi_repository/index.md) | Personal access, job tokens, deploy (project or group), project access |
| [Generic packages](../generic_packages/index.md) | Personal access, job tokens, deploy (project or group), project access |
| [Terraform](../terraform_module_registry/index.md) | Personal access, job tokens, deploy (project or group), project access |
| [Composer](../composer_repository/index.md) | Personal access, job tokens, deploy (project or group), project access |
| [Conan](../conan_repository/index.md) | Personal access, job tokens, project access |
| [Helm](../helm_repository/index.md) | Personal access, job tokens, deploy (project or group) |
| [Debian](../debian_repository/index.md) | Personal access, job tokens, deploy (project or group) |
| [Go](../go_proxy/index.md) | Personal access, job tokens, project access |
| [Ruby gems](../rubygems_registry/index.md) | Personal access, job tokens, deploy (project or group) |
## Authentication protocols **(FREE ALL)**
The following authentication protocols are supported:
| Package type | Supported auth protocols |
|-------------------------------------------------------|-------------------------------------------------------------|
| [Maven (with `mvn`)](../maven_repository/index.md) | Headers, Basic auth ([pulling](#pulling-packages) only) (1) |
| [Maven (with `gradle`)](../maven_repository/index.md) | Headers, Basic auth ([pulling](#pulling-packages) only) (1) |
| [Maven (with `sbt`)](../maven_repository/index.md) | Basic auth (1) |
| [npm](../npm_registry/index.md) | OAuth |
| [NuGet](../nuget_repository/index.md) | Basic auth |
| [PyPI](../pypi_repository/index.md) | Basic auth |
| [Generic packages](../generic_packages/index.md) | Basic auth |
| [Terraform](../terraform_module_registry/index.md) | Token |
| [Composer](../composer_repository/index.md) | OAuth |
| [Conan](../conan_repository/index.md) | OAuth, Basic auth |
| [Helm](../helm_repository/index.md) | Basic auth |
| [Debian](../debian_repository/index.md) | Basic auth |
| [Go](../go_proxy/index.md) | Basic auth |
| [Ruby gems](../rubygems_registry/index.md) | Token |
1. Basic authentication for Maven packages [introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/212854) in GitLab 16.0.
## Supported hash types **(FREE ALL)**
Hash values are used to ensure you are using the correct package. You can view these values in the user interface or with the [API](../../../api/packages.md).
The Package Registry supports the following hash types:
| Package type | Supported hashes |
|-------------------------------------------------------|----------------------------------|
| [Maven (with `mvn`)](../maven_repository/index.md) | MD5, SHA1 |
| [Maven (with `gradle`)](../maven_repository/index.md) | MD5, SHA1 |
| [Maven (with `sbt`)](../maven_repository/index.md) | MD5, SHA1 |
| [npm](../npm_registry/index.md) | SHA1 |
| [NuGet](../nuget_repository/index.md) | not applicable |
| [PyPI](../pypi_repository/index.md) | MD5, SHA256 |
| [Generic packages](../generic_packages/index.md) | SHA256 |
| [Composer](../composer_repository/index.md) | not applicable |
| [Conan](../conan_repository/index.md) | MD5, SHA1 |
| [Helm](../helm_repository/index.md) | not applicable |
| [Debian](../debian_repository/index.md) | MD5, SHA1, SHA256 |
| [Go](../go_proxy/index.md) | MD5, SHA1, SHA256 |
| [Ruby gems](../rubygems_registry/index.md) | MD5, SHA1, SHA256 (gemspec only) |
|
