Identifiers for XMSSMT:
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-20-2-192
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-20-2-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-20-2-512
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-20-4-192
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-20-4-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-20-4-512
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-2-192
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-2-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-2-512
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-4-192
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-4-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-4-512
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-8-192
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-8-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-40-8-512
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-3-192
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-3-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-3-512
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-6-192
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-6-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-6-512
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-12-192
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-12-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-sha2-60-12-512

   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-20-2-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-20-2-512
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-20-4-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-20-4-512
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-40-2-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-40-2-512
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-40-4-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-40-4-512
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-40-8-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-40-8-512
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-60-3-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-60-3-512
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-60-6-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-60-6-512
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-60-12-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake-60-12-512
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-20-2-192
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-20-2-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-20-4-192
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-20-4-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-40-2-192
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-40-2-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-40-4-192
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-40-4-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-40-8-192
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-40-8-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-60-3-192
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-60-3-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-60-6-192
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-60-6-256
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-60-12-192
   http://www.w3.org/2021/04/xmldsig-more#xmssmt-shake256-60-12-256