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Add table of OIDs for use when implementing HashML-DSA and HashSLH-DSA #331

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athoelke merged 2 commits into from
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Add table of OIDs for use when implementing HashML-DSA and HashSLH-DSA #331

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Add tables of hash algorithm OIDs for use in implementing HashML-DSA …
athoelke Jan 23, 2026
8c3f5ed
Include tag and length in the hash algorithm OIDs for ML-DSA and SLH-DSA
athoelke Jan 28, 2026
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24 changes: 24 additions & 0 deletions doc/ext-pqc/about/references
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Expand Up @@ -89,3 +89,27 @@
:author: IETF
:publication: June 2025
:url: tools.ietf.org/html/rfc9802

.. reference:: SM3-draft
:title: The SM3 Cryptographic Hash Function (Draft 02)
:author: Sean Shen, XiaoDong Lee, Ronald Henry Tse, Wong Wai Kit, Paul Yang
:publication: July 2018
:url: datatracker.ietf.org/doc/html/draft-sca-cfrg-sm3-02

.. reference:: RFC9688
:title: Use of the SHA3 One-Way Hash Functions in the Cryptographic Message Syntax (CMS)
:author: IETF
:publication: November 2024
:url: tools.ietf.org/html/rfc9688.html

.. reference:: RFC8017
:title: PKCS #1: RSA Cryptography Specifications Version 2.2
:author: IETF
:publication: November 2016
:url: tools.ietf.org/html/rfc8017.html

.. reference:: RFC8702
:title: Use of the SHAKE One-Way Hash Functions in the Cryptographic Message Syntax (CMS)
:author: IETF
:publication: January 2020
:url: tools.ietf.org/html/rfc8702.html
27 changes: 26 additions & 1 deletion doc/ext-pqc/api/mldsa.rst
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@@ -1,4 +1,4 @@
.. SPDX-FileCopyrightText: Copyright 2024-2025 Arm Limited and/or its affiliates <open-source-office@arm.com>
.. SPDX-FileCopyrightText: Copyright 2024-2026 Arm Limited and/or its affiliates <open-source-office@arm.com>
.. SPDX-License-Identifier: CC-BY-SA-4.0 AND LicenseRef-Patent-license

.. header:: psa/crypto-pqc
Expand Down Expand Up @@ -181,6 +181,27 @@ The pre-hashed signature computation *HashML-DSA* generates distinct signatures
An ML-DSA signature can only be verified with an ML-DSA algorithm.
A HashML-DSA signature can only be verified with a HashML-DSA algorithm.

:numref:`tab-ml-dsa-oid` lists the hash algorithm OIDs to use with the HashML-DSA algorithm.
Note that for HashML-DSA the DER-encoded OID includes the tag and length.

.. csv-table:: Hash algorithm OID to use in HashML-DSA
:name: tab-ml-dsa-oid
:header-rows: 1
:class: longtable
:widths: 6 7 7 8

Hash algorithm, OID (dot notation), OID (ASN.1 hex), Reference
:code:`PSA_ALG_SHA_256`, 2.16.840.1.101.3.4.2.1, ``0609608648016503040201``, :RFC-title:`8017#B.1`
:code:`PSA_ALG_SHA_512_256`, 2.16.840.1.101.3.4.2.6, ``0609608648016503040206``, :RFC:`8017#B.1`
:code:`PSA_ALG_SHA_384`, 2.16.840.1.101.3.4.2.2, ``0609608648016503040202``, :RFC:`8017#B.1`
:code:`PSA_ALG_SHA_512`, 2.16.840.1.101.3.4.2.3, ``0609608648016503040203``, :RFC:`8017#B.1`
:code:`PSA_ALG_SHA3_256`, 2.16.840.1.101.3.4.2.8, ``0609608648016503040208``, :RFC-title:`9688#2`
:code:`PSA_ALG_SHA3_384`, 2.16.840.1.101.3.4.2.9, ``0609608648016503040209``, :RFC:`9688#2`
:code:`PSA_ALG_SHA3_512`, 2.16.840.1.101.3.4.2.10, ``060960864801650304020a``, :RFC:`9688#2`
:code:`PSA_ALG_SHAKE128_256`, 2.16.840.1.101.3.4.2.11, ``060960864801650304020b``, :RFC-title:`8702#2`
:code:`PSA_ALG_SHAKE256_512`, 2.16.840.1.101.3.4.2.12, ``060960864801650304020c``, :RFC:`8702#2`
:code:`PSA_ALG_SM3`, 1.2.156.10197.1.504, ``06082a811ccf55018378``, :cite-title:`SM3-draft` §8.1.3

.. _ml-dsa-contexts:

.. rubric:: Contexts
Expand Down Expand Up @@ -289,6 +310,8 @@ Context values are arbitrary strings between zero and 255 bytes in length.
.. note::
For the pre-hashing, `[FIPS204]` §5.4 recommends the use of an approved hash function with an equivalent, or better, security strength than the chosen ML-DSA parameter set.

:numref:`tab-ml-dsa-oid` lists the hash algorithm OID values to use when implementing HashML-DSA.

This algorithm is randomized: each invocation returns a different, equally valid signature.
See the `notes on hedged signatures <ml-dsa-deterministic-signatures_>`_.

Expand Down Expand Up @@ -348,6 +371,8 @@ Context values are arbitrary strings between zero and 255 bytes in length.
.. note::
For the pre-hashing, `[FIPS204]` §5.4 recommends the use of an approved hash function with an equivalent, or better, security strength than the chosen ML-DSA parameter set.

:numref:`tab-ml-dsa-oid` lists the hash algorithm OID values to use when implementing HashML-DSA.

This algorithm is deterministic: each invocation with the same inputs returns an identical signature.

.. warning::
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25 changes: 25 additions & 0 deletions doc/ext-pqc/api/slhdsa.rst
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Expand Up @@ -305,6 +305,27 @@ The pre-hashed signature computation *HashSLH-DSA* generates distinct signatures
An SLH-DSA signature can only be verified with an SLH-DSA algorithm.
A HashSLH-DSA signature can only be verified with a HashSLH-DSA algorithm.

:numref:`tab-slh-dsa-oid` lists the hash algorithm OIDs to use with the HashSLH-DSA algorithm.
Note that for HashML-DSA the DER-encoded OID includes the tag and length.

.. csv-table:: Hash algorithm OID to use in HashSLH-DSA
:name: tab-slh-dsa-oid
:header-rows: 1
:class: longtable
:widths: 6 7 7 8

Hash algorithm, OID (dot notation), OID (ASN.1 hex), Reference
:code:`PSA_ALG_SHA_256`, 2.16.840.1.101.3.4.2.1, ``0609608648016503040201``, :RFC-title:`8017#B.1`
:code:`PSA_ALG_SHA_512_256`, 2.16.840.1.101.3.4.2.6, ``0609608648016503040206``, :RFC:`8017#B.1`
:code:`PSA_ALG_SHA_384`, 2.16.840.1.101.3.4.2.2, ``0609608648016503040202``, :RFC:`8017#B.1`
:code:`PSA_ALG_SHA_512`, 2.16.840.1.101.3.4.2.3, ``0609608648016503040203``, :RFC:`8017#B.1`
:code:`PSA_ALG_SHA3_256`, 2.16.840.1.101.3.4.2.8, ``0609608648016503040208``, :RFC-title:`9688#2`
:code:`PSA_ALG_SHA3_384`, 2.16.840.1.101.3.4.2.9, ``0609608648016503040209``, :RFC:`9688#2`
:code:`PSA_ALG_SHA3_512`, 2.16.840.1.101.3.4.2.10, ``060960864801650304020a``, :RFC:`9688#2`
:code:`PSA_ALG_SHAKE128_256`, 2.16.840.1.101.3.4.2.11, ``060960864801650304020b``, :RFC-title:`8702#2`
:code:`PSA_ALG_SHAKE256_512`, 2.16.840.1.101.3.4.2.12, ``060960864801650304020c``, :RFC:`8702#2`
:code:`PSA_ALG_SM3`, 1.2.156.10197.1.504, ``06082a811ccf55018378``, :cite-title:`SM3-draft` §8.1.3

.. _slh-dsa-contexts:

.. rubric:: Contexts
Expand Down Expand Up @@ -413,6 +434,8 @@ Context values are arbitrary strings between zero and 255 bytes in length.
.. note::
For the pre-hashing, `[FIPS205]` §10.2 recommends the use of an approved hash function with an equivalent, or better, security strength than the chosen SLH-DSA parameter set.

:numref:`tab-slh-dsa-oid` lists the hash algorithm OID values to use when implementing HashSLH-DSA.

This algorithm is randomized: each invocation returns a different, equally valid signature.
See the `notes on hedged signatures <slh-dsa-deterministic-signatures_>`_.

Expand Down Expand Up @@ -472,6 +495,8 @@ Context values are arbitrary strings between zero and 255 bytes in length.
.. note::
For the pre-hashing, `[FIPS205]` §10.2 recommends the use of an approved hash function with an equivalent, or better, security strength than the chosen SLH-DSA parameter set.

:numref:`tab-slh-dsa-oid` lists the hash algorithm OID values to use when implementing HashSLH-DSA.

This algorithm is deterministic: each invocation with the same inputs returns an identical signature.

.. warning::
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2 changes: 2 additions & 0 deletions doc/ext-pqc/appendix/history.rst
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Expand Up @@ -12,6 +12,8 @@ Changes between *Final 0* and *Final 1*
.. rubric:: Clarifications and fixes

* Updated citations for ML-DSA and SLH-DSA key formats.
* Provided a table of hash algorithm OIDs for use with the HashML-DSA and HashSLH-DSA algorithms.
See :secref:`slh-dsa` and :secref:`ml-dsa`.

Changes between *Beta 3* and *Final 0*
--------------------------------------
Expand Down