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| <title>1. Introduction — PSA Crypto API 1.1.0 documentation</title> |
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| <div class="section" id="introduction"> |
| <h1>1. Introduction</h1> |
| <p>Arm’s Platform Security Architecture (PSA) is a holistic set of threat models, |
| security analyses, hardware and firmware architecture specifications, an |
| open source firmware reference implementation, and an independent evaluation |
| and certification scheme. PSA provides a recipe, based on |
| industry best practice, that allows security to be consistently designed in, at |
| both a hardware and firmware level.</p> |
| <p>The PSA Cryptographic API (Crypto API) described in this document is an |
| important PSA component that provides a portable interface to cryptographic operations |
| on a wide range of hardware. The interface is user-friendly, while still |
| providing access to the low-level primitives used in modern cryptography. It |
| does not require that the user has access to the key material. Instead, it uses |
| opaque key identifiers.</p> |
| <p>This document is part of the PSA family of specifications. It defines an |
| interface for cryptographic services, including cryptography primitives and a |
| key storage functionality.</p> |
| <p>This document includes:</p> |
| <ul class="simple"> |
| <li>A rationale for the design. See <a class="reference internal" href="goals.html#design-goals"><span class="secref">Design goals</span></a>.</li> |
| <li>A high-level overview of the functionality provided by the interface. See <a class="reference internal" href="functionality.html#functionality-overview"><span class="secref">Functionality overview</span></a>.</li> |
| <li>A description of typical architectures of implementations for this specification. See <a class="reference internal" href="sample-arch.html#architectures"><span class="secref">Sample architectures</span></a>.</li> |
| <li>General considerations for implementers of this specification, and for applications that use the interface defined in this specification. See <a class="reference internal" href="implementation.html#implementation-considerations"><span class="secref">Implementation considerations</span></a> and <a class="reference internal" href="usage.html#usage-considerations"><span class="secref">Usage considerations</span></a>.</li> |
| <li>A detailed definition of the API. See <a class="reference internal" href="../api/library/index.html#library-management"><span class="secref">Library management reference</span></a>, <a class="reference internal" href="../api/keys/index.html#key-management"><span class="secref">Key management reference</span></a>, and <a class="reference internal" href="../api/ops/index.html#crypto-operations"><span class="secref">Cryptographic operation reference</span></a>.</li> |
| </ul> |
| <p><span><em>PSA Cryptographic API 1.1 PAKE Extension</em> <a class="reference internal" href="../about.html#citation-psa-pake"><span class="cite">[PSA-PAKE]</span></a></span> is a companion document for version 1.1 of this specification. <a class="reference internal" href="../about.html#citation-psa-pake"><span class="cite">[PSA-PAKE]</span></a> defines a new API for Password Authenticated Key Establishment (PAKE) algorithms. The PAKE API is an initial proposal at BETA status. The API defined by <a class="reference internal" href="../about.html#citation-psa-pake"><span class="cite">[PSA-PAKE]</span></a> is provided in a separate specification to reflect the different status of this API, and indicate that a future version can include incompatible changes to the PAKE API. When the PAKE API is stable, it will be included in a future version of the PSA Cryptographic API specification.</p> |
| <p>In future, other companion documents will define <em>profiles</em> for this specification. A profile is |
| a minimum mandatory subset of the interface that a compliant implementation must |
| provide.</p> |
| </div> |
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| </div> |
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| <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> |
| <div class="sphinxsidebarwrapper"><h3><a href="../index.html"><b>PSA Crypto API</b></a></h3> |
| IHI 0086<br/> |
| Non-confidential<br/> |
| Version 1.1.0 |
| <span style="color: red; font-weight: bold;"></span> |
| <ul> |
| <li class="toctree-l1"><a class="reference internal" href="../about.html">About this document</a></li> |
| </ul> |
| <ul class="current"> |
| <li class="toctree-l1 current"><a class="current reference internal" href="#">1. Introduction</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="goals.html">2. Design goals</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="functionality.html">3. Functionality overview</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="sample-arch.html">4. Sample architectures</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="conventions.html">5. Library conventions</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="implementation.html">6. Implementation considerations</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="usage.html">7. Usage considerations</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../api/library/index.html">8. Library management reference</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../api/keys/index.html">9. Key management reference</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../api/ops/index.html">10. Cryptographic operation reference</a></li> |
| </ul> |
| <ul> |
| <li class="toctree-l1"><a class="reference internal" href="../appendix/example_header.html">Example header file</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../appendix/encodings.html">Algorithm and key type encoding</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../appendix/specdef_values.html">Example macro implementations</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../appendix/sra.html">Security Risk Assessment</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../appendix/history.html">Changes to the API</a></li> |
| </ul> |
| <ul> |
| <li class="toctree-l1"><a class="reference internal" href="../psa_c-identifiers.html">Index of API elements</a></li> |
| </ul> |
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