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<link href="#rfc.toc" rel="Contents">
<link href="#rfc.section.1" rel="Chapter" title="1 Introduction">
<link href="#rfc.section.1.1" rel="Chapter" title="1.1 Requirements Language">
<link href="#rfc.section.2" rel="Chapter" title="2 Test Types and Test Coverage">
<link href="#rfc.section.2.1" rel="Chapter" title="2.1 Test Coverage">
<link href="#rfc.section.2.1.1" rel="Chapter" title="2.1.1 CMAC Requirements Covered">
<link href="#rfc.section.2.1.2" rel="Chapter" title="2.1.2 CMAC Requirements Not Covered">
<link href="#rfc.section.2.1.3" rel="Chapter" title="2.1.3 GMAC Requirements Covered">
<link href="#rfc.section.2.1.4" rel="Chapter" title="2.1.4 GMAC Requirements Not Covered">
<link href="#rfc.section.2.1.5" rel="Chapter" title="2.1.5 HMAC Requirements Covered">
<link href="#rfc.section.2.1.6" rel="Chapter" title="2.1.6 HMAC Requirements Not Covered">
<link href="#rfc.section.3" rel="Chapter" title="3 Capabilities Registration">
<link href="#rfc.section.3.1" rel="Chapter" title="3.1 Required Prerequisite Algorithms for MAC Validations">
<link href="#rfc.section.4" rel="Chapter" title="4 CMAC-AES">
<link href="#rfc.section.4.1" rel="Chapter" title="4.1 CMAC-AES Algorithm Capabilities Registration">
<link href="#rfc.section.4.1.1" rel="Chapter" title="4.1.1 Example CMAC-AES Capabilities JSON Object">
<link href="#rfc.section.4.2" rel="Chapter" title="4.2 CMAC-AES Test Vectors">
<link href="#rfc.section.4.2.1" rel="Chapter" title="4.2.1 CMAC-AES Test Groups JSON Schema">
<link href="#rfc.section.4.2.2" rel="Chapter" title="4.2.2 CMAC-AES Test Case JSON Schema">
<link href="#rfc.section.4.2.3" rel="Chapter" title="4.2.3 Example CMAC-AES Test Vector JSON Object">
<link href="#rfc.section.4.3" rel="Chapter" title="4.3 CMAC-AES Test Vector Responses">
<link href="#rfc.section.4.3.1" rel="Chapter" title="4.3.1 Example CMAC-AES Test Vector Response JSON Object">
<link href="#rfc.section.5" rel="Chapter" title="5 CMAC-TDES">
<link href="#rfc.section.5.1" rel="Chapter" title="5.1 CMAC-TDES Algorithm Capabilities Registration">
<link href="#rfc.section.5.1.1" rel="Chapter" title="5.1.1 Example CMAC-TDES Capabilities JSON Object">
<link href="#rfc.section.5.2" rel="Chapter" title="5.2 CMAC-TDES Test Vectors">
<link href="#rfc.section.5.2.1" rel="Chapter" title="5.2.1 CMAC-TDES Test Groups JSON Schema">
<link href="#rfc.section.5.2.2" rel="Chapter" title="5.2.2 CMAC-TDES Test Case JSON Schema">
<link href="#rfc.section.5.2.3" rel="Chapter" title="5.2.3 Example CMAC-TDES Test Vector JSON Object">
<link href="#rfc.section.5.3" rel="Chapter" title="5.3 CMAC-TDES Test Vector Responses">
<link href="#rfc.section.5.3.1" rel="Chapter" title="5.3.1 Example CMAC-TDES Test Vector Response JSON Object">
<link href="#rfc.section.6" rel="Chapter" title="6 GMAC">
<link href="#rfc.section.6.1" rel="Chapter" title="6.1 AES-GMAC Algorithm Capabilities Registration">
<link href="#rfc.section.6.1.1" rel="Chapter" title="6.1.1 Example AES-GMAC Capabilities JSON Object">
<link href="#rfc.section.6.2" rel="Chapter" title="6.2 AES-GMAC Test Vectors">
<link href="#rfc.section.6.2.1" rel="Chapter" title="6.2.1 AES-GMAC Test Groups JSON Schema">
<link href="#rfc.section.6.2.2" rel="Chapter" title="6.2.2 AES-GMAC Test Case JSON Schema">
<link href="#rfc.section.6.2.3" rel="Chapter" title="6.2.3 Example AES-GMAC Test Vector JSON Object">
<link href="#rfc.section.6.3" rel="Chapter" title="6.3 AES-GMAC Test Vector Responses">
<link href="#rfc.section.6.3.1" rel="Chapter" title="6.3.1 Example AES-GMAC Test Vector Response JSON Object">
<link href="#rfc.section.7" rel="Chapter" title="7 HMAC">
<link href="#rfc.section.7.1" rel="Chapter" title="7.1 HMAC Algorithm Capabilities Registration">
<link href="#rfc.section.7.2" rel="Chapter" title="7.2 Supported HMAC Algorithms">
<link href="#rfc.section.7.2.1" rel="Chapter" title="7.2.1 Example HMAC Capabilities JSON Object">
<link href="#rfc.section.7.3" rel="Chapter" title="7.3 HMAC Test Vectors">
<link href="#rfc.section.7.3.1" rel="Chapter" title="7.3.1 HMAC Test Groups JSON Schema">
<link href="#rfc.section.7.3.2" rel="Chapter" title="7.3.2 HMAC Test Case JSON Schema">
<link href="#rfc.section.7.3.3" rel="Chapter" title="7.3.3 Example HMAC Test Vector JSON Object">
<link href="#rfc.section.7.4" rel="Chapter" title="7.4 HMAC Test Vector Responses">
<link href="#rfc.section.7.4.1" rel="Chapter" title="7.4.1 Example HMAC Test Vector Response JSON Object">
<link href="#rfc.section.8" rel="Chapter" title="8 Acknowledgements">
<link href="#rfc.section.9" rel="Chapter" title="9 IANA Considerations">
<link href="#rfc.section.10" rel="Chapter" title="10 Security Considerations">
<link href="#rfc.references" rel="Chapter" title="11 References">
<link href="#rfc.references.1" rel="Chapter" title="11.1 Normative References">
<link href="#rfc.references.2" rel="Chapter" title="11.2 Informative References">
<link href="#rfc.authors" rel="Chapter">
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<link rel="schema.dct" href="http://purl.org/dc/terms/" />
<meta name="dct.creator" content="Fussell, B., Ed. and R. Hammett, Ed." />
<meta name="dct.identifier" content="urn:ietf:id:draft-ietf-acvp-submac-1.0" />
<meta name="dct.issued" scheme="ISO8601" content="2018-08-01" />
<meta name="dct.abstract" content="This document defines the JSON schema for using HMAC and CMAC algorithms with the ACVP specification." />
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<body>
<table class="header">
<tbody>
<tr>
<td class="left">TBD</td>
<td class="right">B. Fussell, Ed.</td>
</tr>
<tr>
<td class="left">Internet-Draft</td>
<td class="right">Cisco Systems, Inc.</td>
</tr>
<tr>
<td class="left">Intended status: Informational</td>
<td class="right">R. Hammett, Ed.</td>
</tr>
<tr>
<td class="left">Expires: February 2, 2019</td>
<td class="right">G2, Inc.</td>
</tr>
<tr>
<td class="left"></td>
<td class="right">August 1, 2018</td>
</tr>
</tbody>
</table>
<p class="title">ACVP Message Authentication Algorithm JSON Specification<br />
<span class="filename">draft-ietf-acvp-submac-1.0</span></p>
<h1 id="rfc.abstract"><a href="#rfc.abstract">Abstract</a></h1>
<p>This document defines the JSON schema for using HMAC and CMAC algorithms with the ACVP specification.</p>
<h1 id="rfc.status"><a href="#rfc.status">Status of This Memo</a></h1>
<p>This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79.</p>
<p>Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet-Drafts is at https://datatracker.ietf.org/drafts/current/.</p>
<p>Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress."</p>
<p>This Internet-Draft will expire on February 2, 2019.</p>
<h1 id="rfc.copyrightnotice"><a href="#rfc.copyrightnotice">Copyright Notice</a></h1>
<p>Copyright (c) 2018 IETF Trust and the persons identified as the document authors. All rights reserved.</p>
<p>This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License.</p>
<hr class="noprint" />
<h1 class="np" id="rfc.toc"><a href="#rfc.toc">Table of Contents</a></h1>
<ul class="toc">
<li>1. <a href="#rfc.section.1">Introduction</a>
</li>
<ul><li>1.1. <a href="#rfc.section.1.1">Requirements Language</a>
</li>
</ul><li>2. <a href="#rfc.section.2">Test Types and Test Coverage</a>
</li>
<ul><li>2.1. <a href="#rfc.section.2.1">Test Coverage</a>
</li>
<ul><li>2.1.1. <a href="#rfc.section.2.1.1">CMAC Requirements Covered</a>
</li>
<li>2.1.2. <a href="#rfc.section.2.1.2">CMAC Requirements Not Covered</a>
</li>
<li>2.1.3. <a href="#rfc.section.2.1.3">GMAC Requirements Covered</a>
</li>
<li>2.1.4. <a href="#rfc.section.2.1.4">GMAC Requirements Not Covered</a>
</li>
<li>2.1.5. <a href="#rfc.section.2.1.5">HMAC Requirements Covered</a>
</li>
<li>2.1.6. <a href="#rfc.section.2.1.6">HMAC Requirements Not Covered</a>
</li>
</ul></ul><li>3. <a href="#rfc.section.3">Capabilities Registration</a>
</li>
<ul><li>3.1. <a href="#rfc.section.3.1">Required Prerequisite Algorithms for MAC Validations</a>
</li>
</ul><li>4. <a href="#rfc.section.4">CMAC-AES</a>
</li>
<ul><li>4.1. <a href="#rfc.section.4.1">CMAC-AES Algorithm Capabilities Registration</a>
</li>
<ul><li>4.1.1. <a href="#rfc.section.4.1.1">Example CMAC-AES Capabilities JSON Object</a>
</li>
</ul><li>4.2. <a href="#rfc.section.4.2">CMAC-AES Test Vectors</a>
</li>
<ul><li>4.2.1. <a href="#rfc.section.4.2.1">CMAC-AES Test Groups JSON Schema</a>
</li>
<li>4.2.2. <a href="#rfc.section.4.2.2">CMAC-AES Test Case JSON Schema</a>
</li>
<li>4.2.3. <a href="#rfc.section.4.2.3">Example CMAC-AES Test Vector JSON Object</a>
</li>
</ul><li>4.3. <a href="#rfc.section.4.3">CMAC-AES Test Vector Responses</a>
</li>
<ul><li>4.3.1. <a href="#rfc.section.4.3.1">Example CMAC-AES Test Vector Response JSON Object</a>
</li>
</ul></ul><li>5. <a href="#rfc.section.5">CMAC-TDES</a>
</li>
<ul><li>5.1. <a href="#rfc.section.5.1">CMAC-TDES Algorithm Capabilities Registration</a>
</li>
<ul><li>5.1.1. <a href="#rfc.section.5.1.1">Example CMAC-TDES Capabilities JSON Object</a>
</li>
</ul><li>5.2. <a href="#rfc.section.5.2">CMAC-TDES Test Vectors</a>
</li>
<ul><li>5.2.1. <a href="#rfc.section.5.2.1">CMAC-TDES Test Groups JSON Schema</a>
</li>
<li>5.2.2. <a href="#rfc.section.5.2.2">CMAC-TDES Test Case JSON Schema</a>
</li>
<li>5.2.3. <a href="#rfc.section.5.2.3">Example CMAC-TDES Test Vector JSON Object</a>
</li>
</ul><li>5.3. <a href="#rfc.section.5.3">CMAC-TDES Test Vector Responses</a>
</li>
<ul><li>5.3.1. <a href="#rfc.section.5.3.1">Example CMAC-TDES Test Vector Response JSON Object</a>
</li>
</ul></ul><li>6. <a href="#rfc.section.6">GMAC</a>
</li>
<ul><li>6.1. <a href="#rfc.section.6.1">AES-GMAC Algorithm Capabilities Registration</a>
</li>
<ul><li>6.1.1. <a href="#rfc.section.6.1.1">Example AES-GMAC Capabilities JSON Object</a>
</li>
</ul><li>6.2. <a href="#rfc.section.6.2">AES-GMAC Test Vectors</a>
</li>
<ul><li>6.2.1. <a href="#rfc.section.6.2.1">AES-GMAC Test Groups JSON Schema</a>
</li>
<li>6.2.2. <a href="#rfc.section.6.2.2">AES-GMAC Test Case JSON Schema</a>
</li>
<li>6.2.3. <a href="#rfc.section.6.2.3">Example AES-GMAC Test Vector JSON Object</a>
</li>
</ul><li>6.3. <a href="#rfc.section.6.3">AES-GMAC Test Vector Responses</a>
</li>
<ul><li>6.3.1. <a href="#rfc.section.6.3.1">Example AES-GMAC Test Vector Response JSON Object</a>
</li>
</ul></ul><li>7. <a href="#rfc.section.7">HMAC</a>
</li>
<ul><li>7.1. <a href="#rfc.section.7.1">HMAC Algorithm Capabilities Registration</a>
</li>
<li>7.2. <a href="#rfc.section.7.2">Supported HMAC Algorithms</a>
</li>
<ul><li>7.2.1. <a href="#rfc.section.7.2.1">Example HMAC Capabilities JSON Object</a>
</li>
</ul><li>7.3. <a href="#rfc.section.7.3">HMAC Test Vectors</a>
</li>
<ul><li>7.3.1. <a href="#rfc.section.7.3.1">HMAC Test Groups JSON Schema</a>
</li>
<li>7.3.2. <a href="#rfc.section.7.3.2">HMAC Test Case JSON Schema</a>
</li>
<li>7.3.3. <a href="#rfc.section.7.3.3">Example HMAC Test Vector JSON Object</a>
</li>
</ul><li>7.4. <a href="#rfc.section.7.4">HMAC Test Vector Responses</a>
</li>
<ul><li>7.4.1. <a href="#rfc.section.7.4.1">Example HMAC Test Vector Response JSON Object</a>
</li>
</ul></ul><li>8. <a href="#rfc.section.8">Acknowledgements</a>
</li>
<li>9. <a href="#rfc.section.9">IANA Considerations</a>
</li>
<li>10. <a href="#rfc.section.10">Security Considerations</a>
</li>
<li>11. <a href="#rfc.references">References</a>
</li>
<ul><li>11.1. <a href="#rfc.references.1">Normative References</a>
</li>
<li>11.2. <a href="#rfc.references.2">Informative References</a>
</li>
</ul><li><a href="#rfc.authors">Authors' Addresses</a>
</li>
</ul>
<h1 id="rfc.section.1">
<a href="#rfc.section.1">1.</a> Introduction</h1>
<p id="rfc.section.1.p.1">The Automated Crypto Validation Protocol (ACVP) defines a mechanism to automatically verify the cryptographic implementation of a software or hardware crypto module. The ACVP specification defines how a crypto module communicates with an ACVP server, including crypto capabilities negotiation, session management, authentication, vector processing and more. The ACVP specification does not define algorithm specific JSON constructs for performing the crypto validation. A series of ACVP sub-specifications define the constructs for testing individual crypto algorithms. Each sub-specification addresses a specific class of crypto algorithms. This sub-specification defines the JSON constructs for testing HMAC and CMAC crypto algorithms using ACVP.</p>
<h1 id="rfc.section.1.1">
<a href="#rfc.section.1.1">1.1.</a> Requirements Language</h1>
<p id="rfc.section.1.1.p.1">The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted in <a href="#RFC2119" class="xref">RFC 2119</a>. </p>
<h1 id="rfc.section.2">
<a href="#rfc.section.2">2.</a> <a href="#test_types" id="test_types">Test Types and Test Coverage</a>
</h1>
<p id="rfc.section.2.p.1">The ACVP server performs a set of tests on the MAC algorithms in order to assess the correctness and robustness of the implementation. A typical ACVP validation session would require multiple tests to be performed for every supported cryptographic algorithm, such as CMAC-AES, CMAC-TDES, HMAC-SHA-1, HMAC-SHA2-256, etc. This section describes the design of the tests used to validate implementations of MAC algorithms. There is a single test type for MACs (broken into subsections for CMACs). the single test type, algorithm functional test (AFT) can be described as follows: </p>
<ul class="empty"><li>"AFT" - Algorithm Function Test. The IUT processes all of HMAC and the "gen" direction of CMAC by running the randomly chosen key and message data (with constraints as per the IUT's capabilities registration) through the MAC algorithm. CMAC has an additional "ver" direction present in its testing to ensure the IUT can successfully determine when a MAC does not match its originating message/key combination.</li></ul>
<p> </p>
<h1 id="rfc.section.2.1">
<a href="#rfc.section.2.1">2.1.</a> <a href="#test_coverage" id="test_coverage">Test Coverage</a>
</h1>
<p id="rfc.section.2.1.p.1">The tests described in this document have the intention of ensuring an implementation is conformant to <a href="#SP-800-38B" class="xref">[SP-800-38B]</a> and <a href="#FIPS-198-1" class="xref">[FIPS-198-1]</a>.</p>
<h1 id="rfc.section.2.1.1">
<a href="#rfc.section.2.1.1">2.1.1.</a> <a href="#requirements_covered_cmac" id="requirements_covered_cmac">CMAC Requirements Covered</a>
</h1>
<p></p>
<ul class="empty">
<li>SP 800-38b - 6.2 Mac Generation. ACVP server creates random sets of keys and messages for the IUT to process, then compares the IUT's result to the ACVP result. </li>
<li>SP 800-38b - 6.3 Mac Verification. ACVP server creates random sets of keys, messages, and macs. These test vectors are then randomly altered to ensure the MAC will not match the given key and message. Using the provided test case, the IUT is expected to validate the mac against the provided key and message. </li>
</ul>
<p> </p>
<h1 id="rfc.section.2.1.2">
<a href="#rfc.section.2.1.2">2.1.2.</a> <a href="#requirements_not_covered_cmac" id="requirements_not_covered_cmac">CMAC Requirements Not Covered</a>
</h1>
<p></p>
<ul class="empty">
<li>SP 800-38b - 5.4 Sub-keys. While sub-keys are computed, as they are intermediate values, are not validated via current testing.</li>
<li>SP 800-38b - 5.5 Input and Output Data. The mlen is currently provided and not inferred.</li>
<li>SP 800-38b - Appendix A. Length of MAC. The ACVP server will generate vectors as per the IUT's specified criteria. The IUT should register its entire range of supported MAC lengths, regardless of security strength. The ACVP server will test a random sampling of valid MAC lengths as per the IUT registration - this generally includes the minimum and maximum mac length. </li>
</ul>
<p> </p>
<h1 id="rfc.section.2.1.3">
<a href="#rfc.section.2.1.3">2.1.3.</a> <a href="#requirements_covered_gmac" id="requirements_covered_gmac">GMAC Requirements Covered</a>
</h1>
<p></p>
<ul class="empty">
<li>SP 800-38d - 5.1 Block Cipher. ACVP testing SHALL make use of the AES block cipher when testing GMAC. </li>
<li>SP 800-38d - 5.2 Two Gcm Functions. ACVP testing MAY test both the generate and verify functions of GCM (without making use of a payload) to help ensure a proper implementation. The ACVP and IUT MAY test the encrypt (generate) and decrypt (verify) utilizing a key, iv/nonce, and aad as described in this document section.</li>
<li>SP 800-38d - 6 Mathematical Components of GCM. GHASH and GCTR produce intermediate values and SHALL be (indirectly) evaluated for correctness via the ACVP generated GMAC test vectors. </li>
<li>SP 800-38d - 7 GCM Specification. When the IUT registers a direction capability of "encrypt", the ACVP server MUST generate vectors for the GCM-AE function. When the IUT registers a capability of "decrypt", the ACVP server MUST generate test vectors for the GCM-AD function.</li>
</ul>
<p> </p>
<h1 id="rfc.section.2.1.4">
<a href="#rfc.section.2.1.4">2.1.4.</a> <a href="#requirements_not_covered_gmac" id="requirements_not_covered_gmac">GMAC Requirements Not Covered</a>
</h1>
<p></p>
<ul class="empty">
<li>SP 800-38d - 5.2.1.1 Input Data. GMAC MUST NOT make use of a plaintext.</li>
<li>SP 800-38d - 5.2.1.2 Output Data. GMAC MUST NOT make use of a ciphertext.</li>
<li>SP 800-38d - 7 GCM Specification. The ACVP server MUST NOT make use of a plaintext or ciphertext for the generation of test vectors for use in GMAC testing.</li>
<li>SP 800-38d - 8 Uniqueness Requirement on IVs and Keys. Key establishment, IV construction, or number of invocations for a specific key/iv SHALL NOT be tested under the scope of the ACVP testing.</li>
</ul>
<p> </p>
<h1 id="rfc.section.2.1.5">
<a href="#rfc.section.2.1.5">2.1.5.</a> <a href="#requirements_covered_hmac" id="requirements_covered_hmac">HMAC Requirements Covered</a>
</h1>
<p></p>
<ul class="empty">
<li>FIPS 198-1 - 3 Cryptographic Keys. The ACVP server will test, depending on the nature of the IUT capabilities registration, keys that are below, at, or above the hashing algorithm block size.</li>
<li>FIPS 198-1 - 4 HMAC Specification. Mac Generation. ACVP server creates random sets of keys and messages for the IUT to process, then compares the IUT's result to the ACVP result.</li>
<li>FIPS 198-1 - 5 Truncation. The ACVP server is capable of generating MACs as per the capability registration of the IUT. Groups will be created containing a random sampling of valid MAC lengths from the IUT registration.</li>
</ul>
<p> </p>
<h1 id="rfc.section.2.1.6">
<a href="#rfc.section.2.1.6">2.1.6.</a> <a href="#requirements_not_covered_hmac" id="requirements_not_covered_hmac">HMAC Requirements Not Covered</a>
</h1>
<p id="rfc.section.2.1.6.p.1">N/A</p>
<h1 id="rfc.section.3">
<a href="#rfc.section.3">3.</a> <a href="#caps_reg" id="caps_reg">Capabilities Registration</a>
</h1>
<p id="rfc.section.3.p.1">ACVP requires crypto modules to register their capabilities. This allows the crypto module to advertise support for specific algorithms, notifying the ACVP server which algorithms need test vectors generated for the validation process. This section describes the constructs for advertising support of HMAC and CMAC algorithms to the ACVP server.</p>
<p id="rfc.section.3.p.2">The algorithm capabilities are advertised as JSON objects within the 'algorithms' value of the ACVP registration message. The 'algorithms' value is an array, where each array element is an individual JSON object defined in this section. The 'algorithms' value is part of the 'capability_exchange' element of the ACVP JSON registration message. See the ACVP specification for details on the registration message. Each algorithm capability advertised is a self-contained JSON object. </p>
<h1 id="rfc.section.3.1">
<a href="#rfc.section.3.1">3.1.</a> <a href="#prereq_algs" id="prereq_algs">Required Prerequisite Algorithms for MAC Validations</a>
</h1>
<p id="rfc.section.3.1.p.1">Each MAC implementation relies on other cryptographic primitives. For example, CMAC uses an underlying SHA algorithm. Each of these underlying algorithm primitives must be validated, either separately or as part of the same submission. ACVP provides a mechanism for specifying the required prerequisites:</p>
<div id="rfc.table.1"></div>
<div id="rereqs_table"></div>
<table cellpadding="3" cellspacing="0" class="tt full center">
<caption>Required MAC Prerequisite Algorithms JSON Values</caption>
<thead><tr>
<th class="left">JSON Value</th>
<th class="left">Description</th>
<th class="left">JSON type</th>
<th class="left">Valid Values</th>
<th class="left">Optional</th>
</tr></thead>
<tbody>
<tr>
<td class="left">algorithm</td>
<td class="left">a prerequisite algorithm</td>
<td class="left">value</td>
<td class="left">AES, SHA, TDES</td>
<td class="left">No</td>
</tr>
<tr>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
</tr>
<tr>
<td class="left">valValue</td>
<td class="left">algorithm validation number</td>
<td class="left">value</td>
<td class="left">actual number or "same"</td>
<td class="left">No</td>
</tr>
<tr>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
</tr>
<tr>
<td class="left">prereqAlgVal</td>
<td class="left">prerequistie algorithm validation</td>
<td class="left">object with algorithm and valValue properties</td>
<td class="left">see above</td>
<td class="left">No</td>
</tr>
</tbody>
</table>
<h1 id="rfc.section.4">
<a href="#rfc.section.4">4.</a> <a href="#cmac_aes_root" id="cmac_aes_root">CMAC-AES</a>
</h1>
<h1 id="rfc.section.4.1">
<a href="#rfc.section.4.1">4.1.</a> <a href="#cmac_aes_caps_reg" id="cmac_aes_caps_reg">CMAC-AES Algorithm Capabilities Registration</a>
</h1>
<p id="rfc.section.4.1.p.1">Each algorithm capability advertised is a self-contained JSON object using the following values.</p>
<div id="rfc.table.2"></div>
<div id="cmac_aes_caps_table"></div>
<table cellpadding="3" cellspacing="0" class="tt full center">
<caption>CMAC-AES Algorithm Capabilities JSON Values</caption>
<thead><tr>
<th class="left">JSON Value</th>
<th class="left">Description</th>
<th class="left">JSON type</th>
<th class="left">Valid Values</th>
<th class="left">Optional</th>
</tr></thead>
<tbody>
<tr>
<td class="left">algorithm</td>
<td class="left">The MAC algorithm to be validated.</td>
<td class="left">value</td>
<td class="left">CMAC-AES</td>
<td class="left">No</td>
</tr>
<tr>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
</tr>
<tr>
<td class="left">revision</td>
<td class="left">The algorithm testing revision to use.</td>
<td class="left">value</td>
<td class="left">"1.0"</td>
<td class="left">No</td>
</tr>
<tr>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
</tr>
<tr>
<td class="left">prereqVals</td>
<td class="left">prerequistie algorithm validations, See <a href="#prereq_algs" class="xref">Section 3.1</a> for examples </td>
<td class="left">array of prereqAlgVal objects</td>
<td class="left">See <a href="#prereq_algs" class="xref">Section 3.1</a> </td>
<td class="left">No</td>
</tr>
<tr>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
</tr>
<tr>
<td class="left">capabilities</td>
<td class="left">The CMAC-AES capabilities </td>
<td class="left">array of capability objects</td>
<td class="left">See <a href="#cmac_aes_capabilities" class="xref">Table 3</a> </td>
<td class="left">No</td>
</tr>
<tr>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
</tr>
</tbody>
</table>
<p id="rfc.section.4.1.p.2">Each capability object describes a separate permutation of direction and key length.</p>
<div id="rfc.table.3"></div>
<div id="cmac_aes_capabilities"></div>
<table cellpadding="3" cellspacing="0" class="tt full center">
<caption>CMAC-AES Capabilities JSON Values</caption>
<thead><tr>
<th class="left">JSON Value</th>
<th class="left">Description</th>
<th class="left">JSON type</th>
<th class="left">Valid Values</th>
<th class="left">Optional</th>
</tr></thead>
<tbody>
<tr>
<td class="left">direction</td>
<td class="left">The MAC direction(s) to test.</td>
<td class="left">array</td>
<td class="left">gen, ver</td>
<td class="left">No</td>
</tr>
<tr>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
</tr>
<tr>
<td class="left">keyLen</td>
<td class="left">The keyLen supported</td>
<td class="left">value</td>
<td class="left">128, 192, 256</td>
<td class="left">No</td>
</tr>
<tr>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
</tr>
<tr>
<td class="left">msgLen</td>
<td class="left">The CMAC message lengths supported in bits. Min/max/increment and values must be mod 8.</td>
<td class="left">Domain</td>
<td class="left">0-524288</td>
<td class="left">No</td>
</tr>
<tr>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
</tr>
<tr>
<td class="left">macLen</td>
<td class="left">The supported mac sizes.</td>
<td class="left">Domain</td>
<td class="left">32-128</td>
<td class="left">No</td>
</tr>
<tr>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
<td class="left"></td>
</tr>
</tbody>
</table>
<p id="rfc.section.4.1.p.3">macLen for CMAC contains a Domain of values, the server may choose values defined by these rules:</p>
<p></p>
<ul>
<li>The smallest CMAC length supported</li>
<li>A second CMAC length supported</li>
<li>The largest CMAC length supported</li>
</ul>
<p> </p>
<p id="rfc.section.4.1.p.5">msgLen for CMAC contains a Domain of values, the server may choose values defined by these rules:</p>
<p></p>
<ul>
<li>The smallest message length supported</li>
<li>Two message lengths divisible by block size</li>
<li>Two message lengths NOT divisible by block size</li>
<li>The largest message length supported</li>
</ul>
<p> </p>
<h1 id="rfc.section.4.1.1">
<a href="#rfc.section.4.1.1">4.1.1.</a> <a href="#cmac_aes_app-reg-ex" id="cmac_aes_app-reg-ex">Example CMAC-AES Capabilities JSON Object</a>
</h1>
<p id="rfc.section.4.1.1.p.1">The following is an example JSON object advertising support for CMAC-AES.</p>
<pre>
{
"algorithm": "CMAC-AES",
"revision": "1.0",
"capabilities": [
{
"direction": "gen",
"keyLen": 128,
"keyingOption": 0,
"msgLen": [
{
"min": 0,
"max": 65536,
"increment": 8
}
],
"macLen": [
{
"min": 64,
"max": 128,
"increment": 8
}
]
},
{
"direction": "ver",
"keyLen": 128,
"keyingOption": 0,
"msgLen": [
{
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