Introduction - PyPI Docs

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Organization Actions </span> </a> </li> <li class="md-nav__item"> <a href="../organization-accounts/actions/project-actions/" class="md-nav__link"> <span class="md-ellipsis"> Project Actions </span> </a> </li> <li class="md-nav__item"> <a href="../organization-accounts/actions/team-actions/" class="md-nav__link"> <span class="md-ellipsis"> Team Actions </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item"> <a href="../organization-accounts/pricing-and-payments/" class="md-nav__link"> <span class="md-ellipsis"> Pricing and Payments </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_3" > <label class="md-nav__link" for="__nav_3" id="__nav_3_label" tabindex="0"> <span class="md-ellipsis"> Trusted Publishers </span> <span class="md-nav__icon md-icon"></span> </label> <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_3_label" aria-expanded="false"> <label class="md-nav__title" for="__nav_3"> <span class="md-nav__icon md-icon"></span> Trusted Publishers </label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="../trusted-publishers/" class="md-nav__link"> <span class="md-ellipsis"> Getting Started </span> </a> </li> <li class="md-nav__item"> <a href="../trusted-publishers/adding-a-publisher/" class="md-nav__link"> <span class="md-ellipsis"> Adding a Trusted Publisher to an Existing PyPI Project </span> </a> </li> <li class="md-nav__item"> <a href="../trusted-publishers/creating-a-project-through-oidc/" class="md-nav__link"> <span class="md-ellipsis"> Creating a PyPI Project with a Trusted Publisher </span> </a> </li> <li class="md-nav__item"> <a href="../trusted-publishers/using-a-publisher/" class="md-nav__link"> <span class="md-ellipsis"> Publishing with a Trusted Publisher </span> </a> </li> <li class="md-nav__item"> <a href="../trusted-publishers/security-model/" class="md-nav__link"> <span class="md-ellipsis"> Security Model and Considerations </span> </a> </li> <li class="md-nav__item"> <a href="../trusted-publishers/troubleshooting/" class="md-nav__link"> <span class="md-ellipsis"> Troubleshooting </span> </a> </li> <li class="md-nav__item"> <a href="../trusted-publishers/internals/" class="md-nav__link"> <span class="md-ellipsis"> Internals and Technical Details </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--active md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4" checked> <label class="md-nav__link" for="__nav_4" id="__nav_4_label" tabindex="0"> <span class="md-ellipsis"> Digital Attestations </span> <span class="md-nav__icon md-icon"></span> </label> <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_4_label" aria-expanded="true"> <label class="md-nav__title" for="__nav_4"> <span class="md-nav__icon md-icon"></span> Digital Attestations </label> <ul class="md-nav__list" 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class="md-nav__icon md-icon"></span> </label> <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_6_label" aria-expanded="false"> <label class="md-nav__title" for="__nav_6"> <span class="md-nav__icon md-icon"></span> API Reference </label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="../api/" class="md-nav__link"> <span class="md-ellipsis"> Introduction </span> </a> </li> <li class="md-nav__item"> <a href="../api/index-api/" class="md-nav__link"> <span class="md-ellipsis"> Index API </span> </a> </li> <li class="md-nav__item"> <a href="../api/upload/" class="md-nav__link"> <span class="md-ellipsis"> Upload API </span> </a> </li> <li class="md-nav__item"> <a href="../api/integrity/" class="md-nav__link"> <span class="md-ellipsis"> Integrity API </span> </a> </li> </ul> </nav> </li> </ul> </nav> </div> </div> </div> <div class="md-sidebar md-sidebar--secondary" data-md-component="sidebar" data-md-type="toc" > <div class="md-sidebar__scrollwrap"> <div class="md-sidebar__inner"> <nav class="md-nav md-nav--secondary" aria-label="Table of contents"> <label class="md-nav__title" for="__toc"> <span class="md-nav__icon md-icon"></span> Table of contents </label> <ul class="md-nav__list" data-md-component="toc" data-md-scrollfix> <li class="md-nav__item"> <a href="#quick-background" class="md-nav__link"> <span class="md-ellipsis"> Quick background </span> </a> </li> <li class="md-nav__item"> <a href="#supported-attestations" class="md-nav__link"> <span class="md-ellipsis"> Supported attestations </span> </a> </li> </ul> </nav> </div> </div> </div> <div class="md-content" data-md-component="content"> <article class="md-content__inner md-typeset"> <a href="https://github.com/pypi/warehouse/blob/main/docs/user/attestations/index.md" title="Edit this page" class="md-content__button md-icon"> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M10 20H6V4h7v5h5v3.1l2-2V8l-6-6H6c-1.1 0-2 .9-2 2v16c0 1.1.9 2 2 2h4zm10.2-7c.1 0 .3.1.4.2l1.3 1.3c.2.2.2.6 0 .8l-1 1-2.1-2.1 1-1c.1-.1.2-.2.4-.2m0 3.9L14.1 23H12v-2.1l6.1-6.1z"/></svg> </a> <h1>Introduction</h1> <div class="admonition info"> <p class="admonition-title">Info</p> <p>Index attestations are currently under active development, and are not yet considered stable.</p> </div> <p>These pages document PyPI's implementation of digital attestations (<a href="https://peps.python.org/pep-0740/">PEP 740</a>), including in-toto attestation predicates specific to PyPI itself.</p> <h2 id="quick-background">Quick background</h2> <p><em>Digital attestations</em> enable package maintainers as well as third parties (such as the index itself, external auditors, etc.) to <em>cryptographically sign</em> for uploaded packages.</p> <p>These signatures bind each release distribution (such as an individual sdist or wheel) to a strong cryptographic digest of its contents, allowing both PyPI and downstream users to verify that a particular package was attested to by a particular identity (such as a GitHub Actions workflow).</p> <p>These attestations can take multiple forms, including <a href="/attestations/publish/v1/">publish attestations</a> for publicly verifiable proof that a package was published via a specific <a href="/trusted-publishers/">Trusted Publisher</a>, or more general <a href="https://slsa.dev/spec/v1.0/provenance">SLSA Provenance</a> attesting to a package's original source location.</p> <h2 id="supported-attestations">Supported attestations</h2> <p>PyPI uses the <a href="https://github.com/in-toto/attestation/blob/main/spec/README.md">in-toto Attestation Framework</a> for the attestations it accepts.</p> <p>Currently, PyPI allows the following attestation predicates:</p> <ul> <li><a href="https://slsa.dev/spec/v1.0/provenance">SLSA Provenance</a></li> <li><a href="/attestations/publish/v1/">PyPI Publish</a></li> </ul> </article> </div> <script>var 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