libsecret

libsecret
Name	libsecret
Title	libsecret
Developer	GNOME Project
Released	2011
Operating system	Unix-like
Platform	Linux, BSD
License	GNU Lesser General Public License

libsecret

libsecret is a C library that provides a high-level API for storing and retrieving passwords and other secrets on Unix-like systems. It implements the FreeDesktop.org Secret Service API and integrates with desktop keyring services used by major projects such as GNOME, KDE, and system components in distributions like Fedora and Debian. The library is used by applications to delegate secure credential storage to system-managed agents and backends, offering interoperability with cryptographic stores, session IPC, and native keyrings.

Overview

libsecret exposes an interface compatible with the Secret Service API standardized by FreeDesktop.org, enabling software such as GNOME Shell, GDM sessions, and KDE Plasma utilities to access credential stores. It interacts with background services like the GNOME keyring daemon and system components provided by systemd user services on distributions including Ubuntu, Fedora, and openSUSE. Designed during efforts around the GNOME platform modernization, libsecret replaces older libraries used by projects like GNOME Keyring and provides bindings for language ecosystems beyond C.

Architecture and Components

The architecture centers on a client–server model with an IPC layer using D-Bus, allowing applications such as Evolution and Firefox integrations to request secrets from a running daemon. Core components include the libsecret client library, a D-Bus proxy implementing the Secret Service API, and backend agents that may delegate storage to components like GNOME Keyring, KWallet, or hardware-backed modules. The design separates concerns: a frontend API for applications, a daemon for managing collections, and unlock/authorization agents that interact with user sessions managed by software such as PolKit and session managers like systemd-logind. On-disk storage backends may use platform facilities provided by Kernel features and distribution packaging systems from Debian and Fedora Project.

API and Usage

The public API, implemented in C and exported via GObject-introspection, allows language bindings for ecosystems such as Python (programming language), JavaScript, and Rust (programming language). Typical usage patterns mirror credential workflows in applications like NetworkManager and Thunderbird (software), where an application creates or searches for items in a named collection, requests unlocking, and retrieves secret attributes. The API includes asynchronous and synchronous methods to integrate with event-driven toolkits such as GTK and main loops provided by GLib. Developers rely on functions that accept attributes and schemas similar to credential metadata used by OAuth 2.0 clients and SSH agents.

Security and Encryption

Security considerations focus on authentication, authorization, and encryption at rest. libsecret leverages the Secret Service API which defines access control and prompt semantics for unlocking collections; agents often integrate with Libgcrypt, OpenSSL, or hardware modules like TPM for key material protection. The threat model aligns with desktop session security practices used in X.Org Server and Wayland environments; unlocking behavior interacts with screen-lock mechanisms such as GNOME Screensaver and PAM modules. libsecret itself delegates cryptographic operations to backends—meaning the security posture depends on implementations like GNOME Keyring or KWallet and on platform services from distributions and projects including Red Hat and Canonical.

Implementations and Integrations

Implementations of the Secret Service API that interoperate with libsecret include GNOME Keyring and KDE's KWallet, with agents provided in the GNOME and KDE ecosystems respectively. Integrations span applications such as Evolution Data Server, NetworkManager, Chromium derivatives, and command-line tools packaged by Debian Project maintainers. Desktop environments provide session activation, unlocking prompts, and policy decisions via components like PolKit and display managers including LightDM and GDM. Language bindings and wrappers produced by community contributors enable usage in projects managed by organizations like Mozilla Foundation and academic research groups.

History and Development

libsecret emerged in the early 2010s as part of a push to modernize credential storage APIs in the GNOME ecosystem, supplanting older libraries tied closely to specific keyring implementations. Development tracked discussions on FreeDesktop.org specifications and coordination among upstream projects such as GNOME Project, KDE e.V., and contributors from distribution teams at Debian and Fedora Project. The library adopted GObject and GIO conventions from GLib and has evolved with contributions from individuals affiliated with organizations like Red Hat and companies participating in the GNOME community. Versioning and release cadence have followed GNOME's module policies and packaging workflows used by distributions.

Adoption and Comparisons

Adoption includes a broad set of desktop applications and system utilities across distributions maintained by Canonical, Red Hat, and SUSE. Compared with alternative approaches—such as per-application encrypted files, hardware security modules like YubiKey, or cloud-managed secret stores from vendors like AWS and HashiCorp—libsecret focuses on user-session convenience and desktop integration. In contrast to cross-platform libraries provided by projects like Microsoft or Apple, libsecret targets Unix-like desktops and emphasizes D-Bus interoperability and desktop agent prompting consistent with FreeDesktop.org standards. Overall, it occupies a role similar to platform keyrings in other ecosystems, balancing usability for developers with reliance on underlying cryptographic and session-management infrastructure.

Category:GNOME Category:Free software programmed in C Category:Security software for Linux