| Internet-Draft | Additional XML Security URIs | February 2024 |
| Eastlake 3rd | Expires 8 August 2024 | [Page] |
This document updates and corrects the IANA "XML Security URIs" registry that lists URIs intended for use with XML digital signatures, encryption, canonicalization, and key management. These URIs identify algorithms and types of information. This document also obsoletes RFC 9231.¶
This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79.¶
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/.¶
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."¶
This Internet-Draft will expire on 8 August 2024.¶
Copyright (c) 2024 IETF Trust and the persons identified as the document authors. All rights reserved.¶
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 Revised BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Revised BSD License.¶
XML digital signatures, canonicalization, and encryption were standardized by the W3C and by the joint IETF/W3C XMLDSIG working group [W3C] [XMLSEC]. These are now W3C Recommendations and some are also RFCs. They are available as follows:¶
| RFC Status |
W3C REC | Topic |
|---|---|---|
|
[RFC3275] Draft Standard |
[XMLDSIG10] | XML Digital Signatures |
|
[RFC3076] Informational |
[CANON10] | Canonical XML |
| - - - - - - | [XMLENC10] | XML Encryption 1.0 |
|
[RFC3741] Informational |
[XCANON] | Exclusive XML Canonicalization 1.0 |
These documents and recommendations use URIs [RFC3986] to identify algorithms and keying information types. The W3C has subsequently produced updated XML Signature 1.1 [XMLDSIG11], Canonical XML 1.1 [CANON11], and XML Encryption 1.1 [XMLENC11] versions, as well as a new XML Signature Properties specification [XMLDSIG-PROP].¶
In addition, the XML Encryption recommendation has been augmented by [GENERIC], which defines algorithms, XML types, and elements necessary to use generic hybrid ciphers in XML security applications. [GENERIC] also provides for a key encapsulation algorithm and a data encapsulation algorithm, with the combination of the two forming the generic hybrid cipher.¶
All camel-case element names (names with both interior upper and lower case letters) herein, such as DigestValue, are from these documents.¶
This document is an updated convenient reference list of URIs and corresponding algorithms in which there is expressed interest. It includes fixes for Errata [Err3597], [Err3965], and [Err4004], and obsoletes [RFC9231].¶
All of the URIs for algorithms and data types herein are listed in the indexes in Section 4. Of these URIs, those that were added by earlier RFCs or by this document have a subsection in Section 2 or 3. A few URIs defined elsewhere also have a subsection in Section 2 or 3, but most such URIs do not. For example, use of SHA-256 as defined in [XMLENC11] has no subsection here but is included in the indexes in Section 4.¶
Specification in this document of the URI representing an algorithm does not imply endorsement of the algorithm for any particular purpose. A protocol specification, which this is not, generally gives algorithm and implementation requirements for the protocol. Security considerations for algorithms are constantly evolving, as documented elsewhere. This specification simply provides some URIs and relevant formatting when those URIs are used.¶
This document is not intended to change the algorithm implementation requirements of any IETF or W3C document. Use of terminology from [RFC2119] and [RFC8174] is intended to be only such as is already stated or implied by other authoritative documents.¶
Progressing XML Digital Signature [RFC3275] along the Standards Track required removal of any algorithms from the original version [RFC3075] for which there was not demonstrated interoperability. This required removal of the Minimal Canonicalization algorithm, in which there was continued interest. The URI for Minimal Canonicalization was included in [RFC9231] and is included here.¶
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here.¶
"camel-case" refers to terms that are mostly lower case but have internal capital letters.¶
The following acronyms are used in this document:¶
The URI [RFC3986] that was dropped from the XML Digital Signature standard due to the transition from Proposed Standard to Draft Standard [RFC3275] is included in Section 2.4 with its original¶
http://www.w3.org/2000/09/xmldsig#¶
prefix so as to avoid changing the XMLDSIG standard's namespace.¶
Additional algorithms in RFC 4051 were given URIs that start with¶
http://www.w3.org/2001/04/xmldsig-more#¶
Further algorithms added in RFC 6931 were given URIs that start with¶
http://www.w3.org/2007/05/xmldsig-more#¶
and algorithms added in [RFC9231] were given URIs that start with¶
http://www.w3.org/2021/04/xmldsig-more#¶
In addition, for ease of reference, this document includes in the indexes in Section 4 many cryptographic algorithm URIs from XML security documents using the namespaces with which they are defined in those documents as follows:¶
http://www.w3.org/2000/09/xmldsig#¶
for some URIs specified in [RFC3275],¶
http://www.w3.org/2001/04/xmlenc#¶
for some URIs specified in [XMLENC10], and¶
http://www.w3/org/xmlsec-ghc#¶
for some URIs specified in [GENERIC].¶
See also [XMLSECXREF].¶
These algorithms are usable wherever a DigestMethod element occurs.¶
Identifier: http://www.w3.org/2001/04/xmldsig-more#md5¶
The MD5 algorithm [RFC1321] takes no explicit parameters. An example of an MD5 DigestAlgorithm element is:¶
<DigestAlgorithm Algorithm="http://www.w3.org/2001/04/xmldsig-more#md5"/>¶
An MD5 digest is a 128-bit string. The content of the DigestValue element SHALL be the base64 [RFC4648] encoding of this bit string viewed as a 16-octet stream. See [RFC6151] for MD5 security considerations.¶
Identifier: http://www.w3.org/2001/04/xmldsig-more#sha224¶
The SHA-224 algorithm [FIPS180-4] [RFC6234] takes no explicit parameters. An example of a SHA-224 DigestAlgorithm element is:¶
<DigestAlgorithm Algorithm="http://www.w3.org/2001/04/xmldsig-more#sha224" />¶
A SHA-224 digest is a 224-bit string. The content of the DigestValue element SHALL be the base64 [RFC4648] encoding of this string viewed as a 28-octet stream.¶
Identifier: http://www.w3.org/2001/04/xmldsig-more#sha384¶
The SHA-384 algorithm [FIPS180-4] takes no explicit parameters. An example of a SHA-384 DigestAlgorithm element is:¶
<DigestAlgorithm Algorithm="http://www.w3.org/2001/04/xmldsig-more#sha384" />¶
A SHA-384 digest is a 384-bit string. The content of the DigestValue element SHALL be the base64 [RFC4648] encoding of this string viewed as a 48-octet stream.¶
Identifier: http://www.w3.org/2007/05/xmldsig-more#whirlpool¶
The Whirlpool algorithm [ISO-10118-3] takes no explicit parameters. An example of a Whirlpool DigestAlgorithm element is:¶
<DigestAlgorithm Algorithm="http://www.w3.org/2007/05/xmldsig-more#whirlpool" />¶
A Whirlpool digest is a 512-bit string. The content of the DigestValue element SHALL be the base64 [RFC4648] encoding of this string viewed as a 64-octet stream.¶
Identifiers: http://www.w3.org/2007/05/xmldsig-more#sha3-224 http://www.w3.org/2007/05/xmldsig-more#sha3-256 http://www.w3.org/2007/05/xmldsig-more#sha3-384 http://www.w3.org/2007/05/xmldsig-more#sha3-512¶
NIST conducted a hash function competition for an alternative to the SHA family. The Keccak-f[1600] algorithm was selected [KECCAK]. This hash function is commonly referred to as "SHA-3" [FIPS202].¶
A SHA-3 224, 256, 384, and 512 digest is a 224-, 256-, 384-, and 512-bit string, respectively. The content of the DigestValue element SHALL be the base64 [RFC4648] encoding of this string viewed as a 28-, 32-, 48-, and 64-octet stream, respectively. An example of a SHA3-224 DigestAlgorithm element is:¶
<DigestAlgorithm Algorithm="http://www.w3.org/2007/05/xmldsig-more#sha3-224" />¶
This section covers SignatureMethod Message Authentication Code (MAC) Algorithms.¶
Note: Some text in this section is duplicated from [RFC3275] for the convenience of the reader. [RFC3275] is normative in case of conflict.¶
Identifier: http://www.w3.org/2001/04/xmldsig-more#hmac-md5¶
The HMAC algorithm [RFC2104] takes the truncation length in bits as a parameter; if the parameter is not specified, then all the bits of the hash are output. An example of an HMAC-MD5 SignatureMethod element is as follows:¶
<SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#hmac-md5"> <HMACOutputLength>112</HMACOutputLength> </SignatureMethod>¶
The output of the HMAC algorithm is the output (possibly truncated) of the chosen digest algorithm. This value SHALL be base64 [RFC4648] encoded in the same straightforward fashion as the output of the digest algorithms. Example: the SignatureValue element for the HMAC-MD5 digest¶
9294727A 3638BB1C 13F48EF8 158BFC9D¶
from the test vectors in [RFC2104] would be¶
kpRyejY4uxwT9I74FYv8nQ==¶
Schema Definition:¶
<simpleType name="HMACOutputLength">
<restriction base="integer"/>
</simpleType>
¶
DTD:¶
<!ELEMENT HMACOutputLength (#PCDATA) >¶
The Schema Definition and DTD immediately above are copied from [RFC3275].¶
Identifiers: http://www.w3.org/2001/04/xmldsig-more#hmac-sha224 http://www.w3.org/2001/04/xmldsig-more#hmac-sha256 http://www.w3.org/2001/04/xmldsig-more#hmac-sha384 http://www.w3.org/2001/04/xmldsig-more#hmac-sha512¶
SHA-224, SHA-256, SHA-384, and SHA-512 [FIPS180-4] [RFC6234] can also be used in HMAC as described in Section 2.2.1 for HMAC-MD5.¶
Identifier: http://www.w3.org/2001/04/xmldsig-more#hmac-ripemd160¶
RIPEMD-160 [ISO-10118-3] is a 160-bit hash that is used here in HMAC. The output can be optionally truncated. An example is as follows:¶
<SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#hmac-ripemd160"> <HMACOutputLength>144</HMACOutputLength> </SignatureMethod>¶
Identifier: http://www.w3.org/2021/04/xmldsig-more#poly1305¶
Poly1305 [RFC8439] [POLY1305] is a high-speed message authentication code algorithm. It takes a 32-octet one-time key and a message and produces a 16-octet tag, which is used to authenticate the message. An example of a Poly1305 SignatureMethod element is as follows:¶
<SignatureMethod Algorithm="http://www.w3.org/2021/04/xmldsig-more#poly1305"/>¶
Identifier: http://www.w3.org/2021/04/xmldsig-more#siphash-2-4¶
SipHash [SipHash1] [SipHash2] computes a 64-bit MAC from a 128-bit secret key and a variable-length message. An example of a SipHash-2-4 SignatureMethod element is as follows:¶
<SignatureMethod Algorithm="http://www.w3.org/2021/04/xmldsig-more#siphash-2-4"/>¶
XMSS (eXtended Merkle Signature Scheme) and XMSSMT (XMSS Multi-Tree) [RFC8391] are stateful hash-based signature schemes [NIST800-208]. According to NIST, it is believed that the security of these schemes depends only on the security of the underlying hash functions, in particular the infeasibility of finding a preimage or a second preimage, and it is believed that the security of these hash functions will not be broken by the development of large-scale quantum computers.¶
For further information on the intended usage of these signature schemes and the careful state management required to maintain their strength, see [NIST800-208].¶
IANA maintains a registry whose entries correspond to the XMSS Identifiers below (see [XMSS]). The fragment part of the URIs is formed by replacing occurrences of underscore ("_") in the name appearing in the IANA registry with hyphen ("-").¶
Identifiers for XMSS: http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-10-192 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-10-256 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-10-512 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-16-192 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-16-256 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-16-512 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-20-192 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-20-256 http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-20-512 http://www.w3.org/2021/04/xmldsig-more#xmss-shake-10-256 http://www.w3.org/2021/04/xmldsig-more#xmss-shake-10-512 http://www.w3.org/2021/04/xmldsig-more#xmss-shake-16-256 http://www.w3.org/2021/04/xmldsig-more#xmss-shake-16-512 http://www.w3.org/2021/04/xmldsig-more#xmss-shake-20-256 http://www.w3.org/2021/04/xmldsig-more#xmss-shake-20-512 http://www.w3.org/2021/04/xmldsig-more#xmss-shake256-10-192 http://www.w3.org/2021/04/xmldsig-more#xmss-shake256-10-256 http://www.w3.org/2021/04/xmldsig-more#xmss-shake256-16-192 http://www.w3.org/2021/04/xmldsig-more#xmss-shake256-16-256 http://www.w3.org/2021/04/xmldsig-more#xmss-shake256-20-192 http://www.w3.org/2021/04/xmldsig-more#xmss-shake256-20-256¶
The hash functions used in the XMSS signature schemes above are SHA2 [RFC6234] or one of the two SHAKE extensible output functions [FIPS202] as indicated by the second token of the URI extension (SHAKE means SHAKE128). The tree height for XMSS is 10, 16, or 20 as indicated by the third token of the URI extension. The SHA2 or SHAKE output size is 192, 256, or 512 bits as indicated by the final token of the URI extension. SHA2 with 192 bits of output means SHA2-256/192, that is, the most significant 192 bits of the SHA-256 hash as specified in [NIST800-208].¶
IANA maintains a registry whose entries correspond to the XMSSMT Identifiers below (see [XMSS]). The fragment part of the URIs is formed by replacing occurrences of underscore ("_") and slash ("/") in the name appearing in the IANA registry with hyphen ("-").¶
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¶
The hash functions used in the XMSSMT signature schemes above are SHA2 [RFC6234] or one of the two the SHAKE extensible output function [FIPS202] as indicated by the second token of the URI extension (SHAKE means SHAKE128). The tree height for XMSSMT is 20, 40, or 60 as indicated by the third token of the URI extension. The number of layers is indicated by a fourth token. The SHA2, SHAKE, or SHAKE256 output size is 192, 256, or 512 bits as indicated by the final token of the URI extension. SHA2 with 192 bits of output means SHA2-256/192, that is, the most significant 192 bits of the SHA-256 hash as specified in [NIST800-208].¶
An example of an XMSS SignatureAlgorithm element is:¶
<SignatureAlgorithm Algorithm="http://www.w3.org/2021/04/xmldsig-more#xmss-sha2-10-192" />¶
These algorithms are distinguished from those in Section 2.2 in that they use public key methods. That is to say, the signing key is different from and not feasibly derivable from the verification key.¶
Identifier: http://www.w3.org/2001/04/xmldsig-more#rsa-md5¶
This implies the PKCS #1 v1.5 padding algorithm described in [RFC8017]. An example of use is:¶
<SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-md5" />¶
The SignatureValue content for an RSA-MD5 signature is the base64 [RFC4648] encoding of the octet string computed as per Section 8.2.1 of [RFC8017], signature generation for the RSASSA-PKCS1-v1_5 signature scheme. As specified in the EMSA-PKCS1-V1_5-ENCODE function in Section 9.2 of [RFC8017], the value input to the signature function MUST contain a prepended algorithm object identifier for the hash function, but the availability of an ASN.1 parser and recognition of OIDs is not required of a signature verifier. The PKCS #1 v1.5 representation appears as:¶
CRYPT (PAD (ASN.1 (OID, DIGEST (data))))
¶
The padded ASN.1 will be of the following form:¶
01 | FF* | 00 | prefix | hash
¶
The vertical bar ("|") represents concatenation. "01", "FF", and "00" are fixed octets of the corresponding hexadecimal value, and the asterisk ("*") after "FF" indicates repetition. "hash" is the MD5 digest of the data. "prefix" is the ASN.1 BER MD5 algorithm designator prefix required in PKCS #1 [RFC8017], that is,¶
hex 30 20 30 0c 06 08 2a 86 48 86 f7 0d 02 05 05 00 04 10
¶
This prefix is included to make it easier to use standard cryptographic libraries. The FF octet MUST be repeated enough times that the value of the quantity being CRYPTed is exactly one octet shorter than the RSA modulus.¶
Identifier: http://www.w3.org/2001/04/xmldsig-more#rsa-sha256¶
This implies the PKCS #1 v1.5 padding algorithm [RFC8017] as described in Section 2.3.1 but with the ASN.1 BER SHA-256 algorithm designator prefix. An example of use is:¶
<SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256" />¶
Identifier: http://www.w3.org/2001/04/xmldsig-more#rsa-sha384¶
This implies the PKCS #1 v1.5 padding algorithm [RFC8017] as described in Section 2.3.1 but with the ASN.1 BER SHA-384 algorithm designator prefix. An example of use is:¶
<SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha384" />¶
Because it takes about the same effort to calculate a SHA-384 message digest as it does a SHA-512 message digest, it is suggested that RSA- SHA512 be used in preference to RSA-SHA384 where possible.¶
Identifier: http://www.w3.org/2001/04/xmldsig-more#rsa-sha512¶
This implies the PKCS #1 v1.5 padding algorithm [RFC8017] as described in Section 2.3.1 but with the ASN.1 BER SHA-512 algorithm designator prefix. An example of use is:¶
<SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha512" />¶
Identifier: http://www.w3.org/2001/04/xmldsig-more#rsa-ripemd160¶
This implies the PKCS #1 v1.5 padding algorithm [RFC8017] as described in Section 2.3.1 but with the ASN.1 BER RIPEMD160 algorithm designator prefix. An example of use is:¶
<SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-ripemd160" />¶
Identifiers: http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha1 http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha224 http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha256 http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha384 http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha512 http://www.w3.org/2021/04/xmldsig-more#ecdsa-sha3-224 http://www.w3.org/2021/04/xmldsig-more#ecdsa-sha3-256 http://www.w3.org/2021/04/xmldsig-more#ecdsa-sha3-384 http://www.w3.org/2021/04/xmldsig-more#ecdsa-sha3-512 http://www.w3.org/2007/05/xmldsig-more#ecdsa-ripemd160 http://www.w3.org/2007/05/xmldsig-more#ecdsa-whirlpool¶
The Elliptic Curve Digital Signature Algorithm (ECDSA) [FIPS186-4] is the elliptic curve analogue of the Digital Signature Algorithm (DSA) signature method, i.e., the Digital Signature Standard (DSS). It takes no explicit parameters. For some detailed specifications of how to use it with SHA hash functions and XML Digital Signature, please see [X9.62] and [RFC4050]. The #sha3-*, #ecdsa-ripemd160, and #ecdsa-whirlpool fragments identify signature methods processed in the same way as specified by the #ecdsa-sha1 fragment, with the exception that a SHA3 function (see Section 2.1.5), RIPEMD160, or Whirlpool (see Section 2.1.4) is used instead of SHA-1.¶
The output of the ECDSA algorithm consists of a pair of integers usually referred to as the pair (r, s). The signature value consists of the base64 encoding of the concatenation of two octet streams that respectively result from the octet encoding of the values r and s in that order. Conversion from integer to octet stream must be done according to the I2OSP operation defined in the [RFC8017] specification with the l parameter equal to the size of the base point order of the curve in octets (e.g., 32 for the P-256 curve and 66 for the P-521 curve [FIPS186-4]).¶
For an introduction to elliptic curve cryptographic algorithms, see [RFC6090] and note the errata (Errata IDs 2773-2777).¶
Identifiers: http://www.w3.org/2001/04/xmldsig-more#esign-sha1 http://www.w3.org/2001/04/xmldsig-more#esign-sha224 http://www.w3.org/2001/04/xmldsig-more#esign-sha256 http://www.w3.org/2001/04/xmldsig-more#esign-sha384 http://www.w3.org/2001/04/xmldsig-more#esign-sha512¶
The ESIGN algorithm specified in [IEEEP1363a] is a signature scheme based on the integer factorization problem.¶
An example of use is:¶
<SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#esign-sha1" />¶
Identifier: http://www.w3.org/2007/05/xmldsig-more#rsa-whirlpool¶
As in the definition of the RSA-SHA1 algorithm in [XMLDSIG11], the designator "RSA" means the RSASSA-PKCS1-v1_5 algorithm as defined in [RFC8017]. When identified through the #rsa-whirlpool fragment identifier, Whirlpool is used as the hash algorithm instead. Use of the ASN.1 BER Whirlpool algorithm designator is implied. That designator is:¶
hex 30 4e 30 0a 06 06 28 cf 06 03 00 37 05 00 04 40¶
as an explicit octet sequence. This corresponds to OID 1.0.10118.3.0.55 defined in [ISO-10118-3].¶
An example of use is:¶
<SignatureMethod Algorithm="http://www.w3.org/2007/05/xmldsig-more#rsa-whirlpool" />¶
Identifiers: http://www.w3.org/2007/05/xmldsig-more#rsa-pss http://www.w3.org/2007/05/xmldsig-more#MGF1¶
These identifiers use the PKCS #1 EMSA-PSS encoding algorithm [RFC8017]. The RSASSA-PSS algorithm takes the digest method (hash function), a mask generation function, the salt length in octets (SaltLength), and the trailer field as explicit parameters.¶
Algorithm identifiers for hash functions specified in XML encryption [XMLENC11], [XMLDSIG11], and in Section 2.1 are considered to be valid algorithm identifiers for hash functions. According to [RFC8017], the default value for the digest function is SHA-1, but due to the discovered weakness of SHA-1 [RFC6194], it is recommended that SHA-256 or a stronger hash function be used. Notwithstanding [RFC8017], SHA-256 is the default to be used with these SignatureMethod identifiers if no hash function has been specified.¶
The default salt length for these SignatureMethod identifiers, if the SaltLength is not specified, SHALL be the number of octets in the hash value of the digest method as recommended in [RFC4055]. In a parameterized RSASSA-PSS signature, the ds:DigestMethod and the SaltLength parameters usually appear. If they do not, the defaults make this equivalent to <http://www.w3.org/2007/05/xmldsig-more#sha256-rsa-MGF1> (see Section 2.3.10). The TrailerField defaults to 1 (0xBC) when omitted.¶
Schema Definition (target namespace <http://www.w3.org/2007/05/xmldsig-more#>):¶
<xs:element name="RSAPSSParams" type="pss:RSAPSSParamsType"
xmlns:pss="http://www.w3.org/2007/05/xmldsig-more#">
<xs:annotation>
<xs:documentation>
Top level element that can be used in xs:any namespace="#other"
wildcard of ds:SignatureMethod content.
</xs:documentation>
</xs:annotation>
</xs:element>
<xs:complexType name="RSAPSSParamsType">
<xs:sequence>
<xs:element ref="ds:DigestMethod" minOccurs="0"/>
<xs:element name="MaskGenerationFunction"
type="pss:MaskGenerationFunctionType" minOccurs="0"
xmlns:pss="http://www.w3.org/2007/05/xmldsig-more#"/>
<xs:element name="SaltLength" type="xs:int"
minOccurs="0"/>
<xs:element name="TrailerField" type="xs:int"
minOccurs="0"/>
</xs:sequence>
</xs:complexType>
<xs:complexType name="MaskGenerationFunctionType">
<xs:sequence>
<xs:element ref="ds:DigestMethod" minOccurs="0"/>
</xs:sequence>
<xs:attribute name="Algorithm" type="xs:anyURI"
default="http://www.w3.org/2007/05/xmldsig-more#MGF1"/>
</xs:complexType>
¶
[RFC8017] currently specifies only one mask generation function MGF1 based on a hash function. Although [RFC8017] allows for parameterization, the default is to use the same hash function as the digest method function. Only this default approach is supported by this section; therefore, the definition of a mask generation function type is not needed yet. The same applies to the trailer field. There is only one value (0xBC) specified in [RFC8017]. Hence, this default parameter must be used for signature generation. The default salt length is the length of the hash function.¶
Identifiers: http://www.w3.org/2007/05/xmldsig-more#sha3-224-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha3-256-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha3-384-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha3-512-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#md2-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#md5-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha1-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha224-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha256-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha384-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#sha512-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#ripemd128-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#ripemd160-rsa-MGF1 http://www.w3.org/2007/05/xmldsig-more#whirlpool-rsa-MGF1¶
An example of use is:¶
<SignatureMethod Algorithm= "http://www.w3.org/2007/05/xmldsig-more#SHA3-256-rsa-MGF1" />¶
Identifier: http://www.w3.org/2001/04/xmldsig-more#rsa-sha224¶
This implies the PKCS #1 v1.5 padding algorithm [RFC8017] as described in Section 2.3.1 but with the ASN.1 BER SHA-224 algorithm designator prefix. An example of use is:¶
<SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha224" />¶
Because it takes about the same effort to calculate a SHA-224 message digest as it does a SHA-256 message digest, it is suggested that RSA-SHA256 be used in preference to RSA-SHA224 where possible.¶
See also Appendix B concerning an erroneous version of this URI that appeared in RFC 6931.¶
The Edwards-curve Digital Signature Algorithm (EdDSA) is a variant of Schnorr's signature system with Edwards curves. A specification is provided and some advantages listed in [RFC8032]. The general EdDSA takes 11 parameters that must be carefully chosen for secure and efficient operation. Identifiers for two variants, Ed25519 and Ed448, are given below.¶
Ed25519 uses 32-octet public keys and produces 64-octet signatures. It provides about 128 bits of security and uses SHA-512 [RFC6234] internally as part of signature generation.¶
Ed448 uses 57-octet public keys and produces 114-octet signatures. It provides about 224 bits of security and uses "SHAKE256" [FIPS202] internally as part of signature generation. (SHAKE256 is specified by NIST as an "Extensible Output Function" and not specified or approved by NIST as a secure hash function.)¶
For further information on the variants of EdDSA identified below, see [RFC8032].¶
Identifiers: http://www.w3.org/2021/04/xmldsig-more#eddsa-ed25519ph http://www.w3.org/2021/04/xmldsig-more#eddsa-ed25519ctx http://www.w3.org/2021/04/xmldsig-more#eddsa-ed25519 http://www.w3.org/2021/04/xmldsig-more#eddsa-ed448 http://www.w3.org/2021/04/xmldsig-more#eddsa-ed448ph¶
An example of use is:¶
<SignatureMethod Algorithm= "http://www.w3.org/2021/04/xmldsig-more#eddsa-ed448" />¶
Thus far, two independent interoperable implementations of Minimal Canonicalization have not been announced. Therefore, when "XML-Signature Syntax and Processing" was advanced along the Standards Track from [RFC3075] to [RFC3275], Minimal Canonicalization was dropped. However, there was still interest. For its definition, see Section 6.5.1 of [RFC3075].¶
For reference, its identifier remains: http://www.w3.org/2000/09/xmldsig#minimal¶
The XPointer Transform algorithm syntax is described below. All CanonicalizationMethod algorithms can also be used as Transform algorithms.¶
Identifier: http://www.w3.org/2001/04/xmldsig-more#xptr¶
This transform algorithm takes an [XPointer] as an explicit parameter. An example of use is:¶
<Transform
Algorithm="http://www.w3.org/2001/04/xmldsig-more/xptr">
<XPointer
xmlns="http://www.w3.org/2001/04/xmldsig-more/xptr">
xpointer(id("foo")) xmlns(bar=http://foobar.example)
xpointer(//bar:Zab[@Id="foo"])
</XPointer>
</Transform>
Schema Definition:
<element name="XPointer" type="string"/>
DTD:
<!ELEMENT XPointer (#PCDATA) >
¶
Input to this transform is an octet stream (which is then parsed into XML).¶
Output from this transform is a node set; the results of the XPointer are processed as defined in the XMLDSIG specification [RFC3275] for a same-document XPointer.¶
This subsection gives identifiers and information for several EncryptionMethod Algorithms.¶
Identifier: http://www.w3.org/2001/04/xmldsig-more#arcfour¶
ARCFOUR is a fast, simple stream encryption algorithm that is compatible with RSA Security's RC4 algorithm [RC4] (Rivest Cipher 4); however, RC4 has been found to have a number of weaknesses and its use is prohibited in several IETF protocols, for example TLS [RFC7465].¶
An example EncryptionMethod element using ARCFOUR is:¶
<EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#arcfour"> <KeySize>40</KeySize> </EncryptionMethod>¶
ARCFOUR makes use of the generic KeySize parameter specified and defined in [XMLENC11].¶
Identifiers: http://www.w3.org/2001/04/xmldsig-more#camellia128-cbc http://www.w3.org/2001/04/xmldsig-more#camellia192-cbc http://www.w3.org/2001/04/xmldsig-more#camellia256-cbc¶
Camellia is a block cipher with the same interface as the AES [CAMELLIA] [RFC3713]; it has a 128-bit block size and 128-, 192-, and 256-bit key sizes. In XML Encryption, Camellia is used in the same way as the AES: It is used in the Cipher Block Chaining (CBC) mode with a 128-bit initialization vector (IV). The resulting cipher text is prefixed by the IV. If included in XML output, it is then base64 encoded. An example Camellia EncryptionMethod is as follows:¶
<EncryptionMethod Algorithm= "http://www.w3.org/2001/04/xmldsig-more#camellia128-cbc" />¶
Identifiers: http://www.w3.org/2001/04/xmldsig-more#kw-camellia128 http://www.w3.org/2001/04/xmldsig-more#kw-camellia192 http://www.w3.org/2001/04/xmldsig-more#kw-camellia256¶
Camellia [CAMELLIA] [RFC3713] key wrap is identical to the AES key wrap algorithm [RFC3394] specified in the XML Encryption standard with "AES" replaced by "Camellia". As with AES key wrap, the check value is 0xA6A6A6A6A6A6A6A6.¶
The algorithm is the same regardless of the size of the Camellia key used in wrapping, called the "key encrypting key" or "KEK". If Camellia is supported, it is particularly suggested that wrapping 128-bit keys with a 128-bit KEK and wrapping 256-bit keys with a 256-bit KEK be supported.¶
An example of use is:¶
<EncryptionMethod Algorithm= "http://www.w3.org/2001/04/xmldsig-more#kw-camellia128" />¶
Identifiers: http://www.w3.org/2001/04/xmldsig-more#psec-kem http://www.w3.org/2010/xmlsec-ghc#rsaes-kem http://www.w3.org/2010/xmlsec-ghc#ecies-kem¶
These algorithms, specified in [ISO-18033-2], are key encapsulation mechanisms using elliptic curve or RSA encryption. RSAEA-KEM and ECIES-KEM are also specified in [GENERIC].¶
An example of use of PSEC-KEM is:¶
<EncryptionMethod
Algorithm="http://www.w3.org/2001/04/xmldsig-more#psec-kem">
<ECParameters>
<Version>version</Version>
<FieldID>id</FieldID>
<Curve>curve</Curve>
<Base>base</Base>
<Order>order</Order>
<Cofactor>cofactor</Cofactor>
</ECParameters>
</EncryptionMethod>
¶
See [ISO-18033-2] for information on the parameters above.¶
Identifier: http://www.w3.org/2007/05/xmldsig-more#seed128-cbc¶
SEED [RFC4269] is a block cipher with a 128-bit block size and 128-bit key size. In XML Encryption, SEED can be used in the Cipher Block Chaining (CBC) mode with a 128-bit initialization vector (IV). The resulting cipher text is prefixed by the IV. If included in XML output, it is then base64 encoded.¶
An example SEED EncryptionMethod is as follows:¶
<EncryptionMethod Algorithm="http://www.w3.org/2007/05/xmldsig-more#seed128-cbc" />¶
Identifier: http://www.w3.org/2007/05/xmldsig-more#kw-seed128¶
Key wrapping with SEED is identical to Section 2.2.1 of [RFC3394] with "AES" replaced by "SEED". The algorithm is specified in [RFC4010]. The implementation of SEED is optional. The default initial value is 0xA6A6A6A6A6A6A6A6.¶
An example of use is:¶
<EncryptionMethod Algorithm= "http://www.w3.org/2007/05/xmldsig-more#kw-seed128" />¶
Identifier: http://www.w3.org/2021/04/xmldsig-more#chacha20¶
ChaCha20 [RFC8439], a stream cipher, is a variant of Salsa20 [ChaCha]. It is considerably faster than AES in software-only implementations. In addition to a 256-bit key and the plain text to be encrypted, ChaCha20 takes a 96-bit Nonce and an initial 32-bit Counter. The Nonce and Counter are represented as hex in nested elements as shown below.¶
An example of use is:¶
<xenc:EncryptionMethod xmlns:xenc="http://www.w3.org/2001/04/xmlenc#"
xmlns:dsig-more="http://www.w3.org/2021/04/xmldsig-more#"
Algorithm="http://www.w3.org/2021/04/xmldsig-more#chacha20">
<dsig-more:Nonce>0123456789abcdef01234567</dsig-more:Nonce>
<dsig-more:Counter>fedcba09</dsig-more:Counter>
</xenc:EncryptionMethod>
¶
XML schema definition (target namespace <http://www.w3.org/2021/04/xmldsig-more#>):¶
<xs:element name="Nonce" type="xs:hexBinary" /> <xs:element name="Counter" type="xs:hexBinary" />¶
Identifier: http://www.w3.org/2021/04/xmldsig-more#chacha20poly1305¶
ChaCha20+Poly1305 is an Authenticated Encryption with Associated Data (AEAD) algorithm. In addition to a 256-bit key and plain text to be encrypted and authenticated, ChaCha20+Poly1305 takes a 96-bit Nonce and variable-length Additional Authenticated Data (AAD). The Nonce is represented as a child element of the EncryptionMethod element with a hex value. The AAD is a string, which may be null. The AAD element may be absent, in which case the AAD is null. The CipherData, either present in the CipherValue or by reference, is the concatenation of the encrypted ChaCha20 output and the Poly1305 128-bit tag.¶
An example of use is:¶
<xenc:EncryptionMethod xmlns:xenc="http://www.w3.org/2001/04/xmlenc#" xmlns:dsig-more="http://www.w3.org/2021/04/xmldsig-more#" Algorithm= "http://www.w3.org/2021/04/xmldsig-more#chacha20poly1305"> <dsig-more:Nonce>0123456789abcdef01234567</dsig-more:Nonce> <dsig-more:AAD>The quick brown fox jumps over the lazy dog. </dsig-more:AAD> </xend:EncryptionMethod>¶
XML schema definition (target namespace <http://www.w3.org/2021/04/xmldsig-more#>):¶
<xs:element name="ADD" type="xs:string" />¶
This subsection gives identifiers and information for an additional key AgreementMethod Algorithm [XMLENC11].¶
Identifier: http://www.w3.org/2021/04/xmldsig-more#x25519 http://www.w3.org/2021/04/xmldsig-more#x448¶
The X25519 and X448 key agreement algorithms are specified in [RFC7748].¶
This subsection gives identifiers and information for an additional KeyDerivationMethod Algorithm [XMLENC11].¶
This section covers the HMAC-based Extract-and-Expand Key Derivation Function (HKDF [RFC5869]).¶
Identifier: http://www.w3.org/2021/04/xmldsig-more#hkdf¶
HKDF takes as inputs a hash function, an optional non-secret "salt", initial keying material (IKM), optional context and application-specific "info", and the required output keying size. Note that these strictly determine the output so, for example, invoking HKDF at different times but with the same salt, info, initial keying material, and output key size will produce identical output keying material.¶
The inputs are represented in the HKDFParamsType as follows:¶
<xs:element name="HKDFParams" type="xenc11:HKDFParamsType"/>
<xs:complexType name="HKDFParamsType">
<xs:sequence>
<xs:element name="PRF"
type="xenc11:PRFAlgorithmIdentifierType"/>
<xs:element name="Salt" minOccurs="0" maxOccurs="1"
type="xs:base64Binary"/>
<xs:element name="Info" minOccurs="0" maxOccurs="1"
type="xs:base64Binary"/>
<xs:element name="KeyLength" minOccurs="0" maxOccurs="1"
type="xs:positiveInteger"/>
</xs:sequence>
</xs:complexType>
¶
Here is an example that creates a 128 bit key using a specified random Salt and Info. Its output could be used as an AES 128 symmetric encryption key:¶
<dsig-more:HKDFParams
xmlns:dsig-more="http://www.w3.org/2021/04/xmldsig-more#">
<dsig-more:PRF Algorithm=
"http://www.w3.org/2001/04/xmldsig-more#hmac-sha256"/>
<dsig-more:Salt>W23UWkg+YnseJAnBYHzUEw==</dsig-more:Salt>
<dsig-more:Info>TQgMtqHohFznyg==</dsig-more:Info>
<dsig-more:KeyLength>16</dsig-more:KeyLength>
</dsig-more:HKDFParams>
¶
This example element could be included as a child element of an xenc11:KeyDerivationMethod that has a value http://www.w3.org/2021/04/xmldsig-more#hkdf for its Algorithm attribute.¶
In Section 3.1, a KeyInfo element child is specified, while in Section 3.2, additional KeyInfo Type values for use in RetrievalMethod are specified.¶
A PKCS #7 [RFC2315] "signedData" can also be used as a bag of certificates and/or certificate revocation lists (CRLs). The PKCS7signedData element is defined to accommodate such structures within KeyInfo. The binary PKCS #7 structure is base64 [RFC4648] encoded. Any signer information present is ignored. The following is an example [RFC3092], eliding the base64 data:¶
<foo:PKCS7signedData xmlns:foo="http://www.w3.org/2001/04/xmldsig-more#"> ... </foo:PKCS7signedData>¶
XML schema definition of the PKCS7signedData element:¶
<xs:element name="PKCS7signedData" type="xs:base64Binary"/>¶
The Type attribute of RetrievalMethod is an optional identifier for the type of data to be retrieved. The result of dereferencing a RetrievalMethod reference for all KeyInfo types with an XML structure is an XML element or document with that element as the root. The various "raw" key information types return a binary value. Thus, they require a Type attribute because they are not unambiguously parsable.¶
Identifiers: http://www.w3.org/2001/04/xmldsig-more#KeyName http://www.w3.org/2001/04/xmldsig-more#KeyValue http://www.w3.org/2001/04/xmldsig-more#PKCS7signedData http://www.w3.org/2001/04/xmldsig-more#rawPGPKeyPacket http://www.w3.org/2001/04/xmldsig-more#rawPKCS7signedData http://www.w3.org/2001/04/xmldsig-more#rawSPKISexp http://www.w3.org/2001/04/xmldsig-more#rawX509CRL http://www.w3.org/2001/04/xmldsig-more#RetrievalMethod¶
The following subsections provide an index by URI and by fragment identifier (the portion of the URI after "#") of the algorithm and KeyInfo URIs defined in this document and in the standards plus the one KeyInfo child element name defined in this document. The "Sec/Doc" column has the section of this document or, if not specified in this document, the standards document where the item is specified. See also [XMLSECXREF].¶
The initial "http://www.w3.org/" part of the URI is not included below. The first six entries have a null fragment identifier or no fragment identifier. "{Bad}" indicates a bad value that was accidentally included in RFC 6931. Implementations SHOULD only generate the correct URI but SHOULD understand both the correct and erroneous URI. See also Appendix B.¶
Fragment URI Sec/Doc
--------- ---- --------
2001/10/xml-exc-c14n# [XCANON]
2002/06/xmldsig-filter2 [XPATH]
2006/12/xmlc12n11# {Bad} [CANON11]
2006/12/xml-c14n11# [CANON11]
TR/1999/REC-xslt-19991116 [XSLT]
TR/1999/REC-xpath-19991116 [XPATH]
TR/2001/REC-xml-c14n-20010315 [CANON10]
TR/2001/REC-xmlschema-1-20010502 [SCHEMA]
aes128-cbc 2001/04/xmlenc#aes128-cbc [XMLENC11]
aes128-gcm 2009/xmlenc11#aes128-gcm [XMLENC11]
aes192-cbc 2001/04/xmlenc#aes192-cbc [XMLENC11]
aes192-gcm 2009/xmlenc11#aes192-gcm [XMLENC11]
aes256-cbc 2001/04/xmlenc#aes256-cbc [XMLENC11]
aes256-gcm 2009/xmlenc11#aes256-gcm [XMLENC11]
arcfour 2001/04/xmldsig-more#arcfour 2.6.1
base64 2000/09/xmldsig#base64 [RFC3275]
camellia128-cbc 2001/04/xmldsig-more#camellia128-cbc 2.6.2
camellia192-cbc 2001/04/xmldsig-more#camellia192-cbc 2.6.2
camellia256-cbc 2001/04/xmldsig-more#camellia256-cbc 2.6.2
chacha20 2021/04/xmldsig-more#chacha20 2.6.7
chacha20poly1305 2021/04/xmldsig-more#chacha20poly1305 2.6.8
ConcatKDF 2009/xmlenc11#ConcatKDF [XMLENC11]
decrypt#XML 2002/07/decrypt#XML [DECRYPT]
decrypt#Binary 2002/07/decrypt#Binary [DECRYPT]
DEREncodedKeyValue 2009/xmldsig11#DEREncodedKeyValue [XMLDSIG11]
dh 2001/04/xmlenc#dh [XMLENC11]
dh-es 2009/xmlenc11#dh-es [XMLENC11]
dsa-sha1 2000/09/xmldsig#dsa-sha1 [RFC3275]
dsa-sha256 2009/xmldsig11#dsa-sha256 [XMLDSIG11]
DSAKeyValue 2000/09/xmldsig#DSAKeyValue [XMLDSIG11]
ECDH-ES 2009/xmlenc11#ECDH-ES [XMLENC11]
ecdsa-ripemd160 2007/05/xmldsig-more#ecdsa-ripemd160 2.3.6
ecdsa-sha1 2001/04/xmldsig-more#ecdsa-sha1 2.3.6
ecdsa-sha224 2001/04/xmldsig-more#ecdsa-sha224 2.3.6
ecdsa-sha256 2001/04/xmldsig-more#ecdsa-sha256 2.3.6
ecdsa-sha384 2001/04/xmldsig-more#ecdsa-sha384 2.3.6
ecdsa-sha512 2001/04/xmldsig-more#ecdsa-sha512 2.3.6
ecdsa-sha3-224 2021/04/xmldsig-more#ecdsa-sha3-224 2.3.6
ecdsa-sha3-256 2021/04/xmldsig-more#ecdsa-sha3-256 2.3.6
ecdsa-sha3-384 2021/04/xmldsig-more#ecdsa-sha3-384 2.3.6
ecdsa-sha3-512 2021/04/xmldsig-more#ecdsa-sha3-512 2.3.6
ecdsa-whirlpool 2007/05/xmldsig-more#ecdsa-whirlpool 2.3.5
ecies-kem 2010/xmlsec-ghc#ecies-kem [GENERIC]
ECKeyValue 2009/xmldsig11#ECKeyValue [XMLDSIG11]
eddsa-ed25519 2021/04/xmldsig-more#eddsa-ed25519 2.3.12
eddsa-ed25519ctx 2021/04/xmldsig-more#eddsa-ed25519ctx 2.3.12
eddsa-ed25519ph 2021/04/xmldsig-more#eddsa-ed25519ph 2.3.12
eddsa-ed448 2021/04/xmldsig-more#eddsa-ed448 2.3.12
eddsa-ed448ph 2021/04/xmldsig-more#eddsa-ed448ph 2.3.12
enveloped-signature 2000/09/xmldsig#enveloped-signature [RFC3275]
esign-sha1 2001/04/xmldsig-more#esign-sha1 2.3.7
esign-sha224 2001/04/xmldsig-more#esign-sha224 2.3.7
esign-sha256 2001/04/xmldsig-more#esign-sha256 2.3.7
esign-sha384 2001/04/xmldsig-more#esign-sha384 2.3.7
esign-sha512 2001/04/xmldsig-more#esign-sha512 2.3.7
generic-hybrid 2010/xmlsec-ghc#generic-hybrid [GENERIC]
hkdf 2021/04/xmldsig-more#hkdf 2.8.1
hmac-md5 2001/04/xmldsig-more#hmac-md5 2.2.1
hmac-ripemd160 2001/04/xmldsig-more#hmac-ripemd160 2.2.3
hmac-sha1 2000/09/xmldsig#hmac-sha1 [RFC3275]
hmac-sha224 2001/04/xmldsig-more#hmac-sha224 2.2.2
hmac-sha256 2001/04/xmldsig-more#hmac-sha256 2.2.2
hmac-sha384 2001/04/xmldsig-more#hmac-sha384 2.2.2
hmac-sha512 2001/04/xmldsig-more#hmac-sha512 2.2.2
KeyName 2001/04/xmldsig-more#KeyName 3.2
KeyValue 2001/04/xmldsig-more#KeyValue 3.2
kw-aes128 2001/04/xmlenc#kw-aes128 [XMLENC11]
kw-aes128-pad 2009/xmlenc11#kw-aes-128-pad [XMLENC11]
kw-aes192 2001/04/xmlenc#kw-aes192 [XMLENC11]
kw-aes192-pad 2009/xmlenc11#kw-aes-192-pad [XMLENC11]
kw-aes256 2001/04/xmlenc#kw-aes256 [XMLENC11]
kw-aes256-pad 2009/xmlenc11#kw-aes-256-pad [XMLENC11]
kw-camellia128 2001/04/xmldsig-more#kw-camellia128 2.6.3
kw-camellia192 2001/04/xmldsig-more#kw-camellia192 2.6.3
kw-camellia256 2001/04/xmldsig-more#kw-camellia256 2.6.3
kw-seed128 2007/05/xmldsig-more#kw-seed128 2.6.6
md2-rsa-MGF1 2007/05/xmldsig-more#md2-rsa-MGF1 2.3.10
md5 2001/04/xmldsig-more#md5 2.1.1
md5-rsa-MGF1 2007/05/xmldsig-more#md5-rsa-MGF1 2.3.10
MGF1 2007/05/xmldsig-more#MGF1 2.3.9
mgf1sha1 2009/xmlenc11#mgf1sha1 [XMLENC11]
mgf1sha224 2009/xmlenc11#mgf1sha224 [XMLENC11]
mgf1sha256 2009/xmlenc11#mgf1sha256 [XMLENC11]
mgf1sha384 2009/xmlenc11#mgf1sha384 [XMLENC11]
mgf1sha512 2009/xmlenc11#mgf1sha512 [XMLENC11]
MgmtData 2000/09/xmldsig#MgmtData [XMLDSIG11]
minimal 2000/09/xmldsig#minimal 2.4
pbkdf2 2009/xmlenc11#pbkdf2 [XMLENC11]
PGPData 2000/09/xmldsig#PGPData [XMLDSIG11]
PKCS7signedData 2001/04/xmldsig-more#PKCS7signedData 3.1
PKCS7signedData 2001/04/xmldsig-more#PKCS7signedData 3.2
poly1305 2021/04/xmldsig-more#poly1305 2.2.4
psec-kem 2001/04/xmldsig-more#psec-kem 2.6.4
rawPGPKeyPacket 2001/04/xmldsig-more#rawPGPKeyPacket 3.2
rawPKCS7signedData 2001/04/xmldsig-more#rawPKCS7signedData 3.2
rawSPKISexp 2001/04/xmldsig-more#rawSPKISexp 3.2
rawX509Certificate 2000/09/xmldsig#rawX509Certificate [RFC3275]
rawX509CRL 2001/04/xmldsig-more#rawX509CRL 3.2
RetrievalMethod 2001/04/xmldsig-more#RetrievalMethod 3.2
ripemd128-rsa-MGF1 2007/05/xmldsig-more#ripemd128-rsa-MGF1
2.3.10
ripemd160 2001/04/xmlenc#ripemd160 [XMLENC11]
ripemd160-rsa-MGF1 2007/05/xmldsig-more#ripemd160-rsa-MGF1
2.3.10
rsa-1_5 2001/04/xmlenc#rsa-1_5 [XMLENC11]
rsa-md5 2001/04/xmldsig-more#rsa-md5 2.3.1
rsa-oaep 2009/xmlenc11#rsa-oaep [XMLENC11]
rsa-oaep-mgf1p 2001/04/xmlenc#rsa-oaep-mgf1p [XMLENC11]
rsa-pss 2007/05/xmldsig-more#rsa-pss 2.3.9
rsa-ripemd160 2001/04/xmldsig-more#rsa-ripemd160 2.3.5
rsa-sha1 2000/09/xmldsig#rsa-sha1 [RFC3275]
rsa-sha224 2007/05/xmldsig-more#rsa-sha224 {Bad} 2.3.11
rsa-sha224 2001/04/xmldsig-more#rsa-sha224 2.3.11
rsa-sha256 2001/04/xmldsig-more#rsa-sha256 2.3.2
rsa-sha384 2001/04/xmldsig-more#rsa-sha384 2.3.3
rsa-sha512 2001/04/xmldsig-more#rsa-sha512 2.3.4
rsa-whirlpool 2007/05/xmldsig-more#rsa-whirlpool 2.3.5
rsaes-kem 2010/xmlsec-ghc#rsaes-kem [GENERIC]
RSAKeyValue 2000/09/xmldsig#RSAKeyValue [XMLDSIG11]
seed128-cbc 2007/05/xmldsig-more#seed128-cbc 2.6.5
sha1 2000/09/xmldsig#sha1 [RFC3275]
sha1-rsa-MGF1 2007/05/xmldsig-more#sha1-rsa-MGF1 2.3.10
sha224 2001/04/xmldsig-more#sha224 2.1.2
sha224-rsa-MGF1 2007/05/xmldsig-more#sha224-rsa-MGF1 2.3.10
sha256 2001/04/xmlenc#sha256 [XMLENC11]
sha256-rsa-MGF1 2007/05/xmldsig-more#sha256-rsa-MGF1 2.3.10
sha3-224 2007/05/xmldsig-more#sha3-224 2.1.5
sha3-224-rsa-MGF1 2007/05/xmldsig-more#sha3-224-rsa-MGF1 2.3.10
sha3-256 2007/05/xmldsig-more#sha3-256 2.1.5
sha3-256-rsa-MGF1 2007/05/xmldsig-more#sha3-256-rsa-MGF1 2.3.10
sha3-384 2007/05/xmldsig-more#sha3-384 2.1.5
sha3-384-rsa-MGF1 2007/05/xmldsig-more#sha3-384-rsa-MGF1 2.3.10
sha3-512 2007/05/xmldsig-more#sha3-512 2.1.5
sha3-512-rsa-MGF1 2007/05/xmldsig-more#sha3-512-rsa-MGF1 2.3.10
sha384 2001/04/xmldsig-more#sha384 2.1.3
sha384-rsa-MGF1 2007/05/xmldsig-more#sha384-rsa-MGF1 2.3.10
sha512 2001/04/xmlenc#sha512 [XMLENC11]
sha512-rsa-MGF1 2007/05/xmldsig-more#sha512-rsa-MGF1 2.3.10
siphash-2-4 2021/04/xmldsig-more#siphash-2-4 2.2.5
SPKIData 2000/09/xmldsig#SPKIData [XMLDSIG11]
tripledes-cbc 2001/04/xmlenc#tripledes-cbc [XMLENC11]
whirlpool 2007/05/xmldsig-more#whirlpool 2.1.4
whirlpool-rsa-MGF1 2007/05/xmldsig-more#whirlpool-rsa-MGF1
2.3.10
WithComments 2001/10/xml-exc-c14n#WithComments [XCANON]
WithComments 2006/12/xml-c14n11#WithComments [CANON11]
WithComments TR/2001/REC-xml-c14n-20010315#WithComments
[CANON10]
x25519 2021/04/xmldsig-more#x25519 2.7.1
x448 2021/04/xmldsig-more#x448 2.7.1
X509Data 2000/09/xmldsig#X509Data [XMLDSIG11]
xmss-sha2-10-192 2021/04/xmldsig-more#xmss-sha2-10-192 2.2.6
xmss-sha2-10-256 2021/04/xmldsig-more#xmss-sha2-10-256 2.2.6
xmss-sha2-10-512 2021/04/xmldsig-more#xmss-sha2-10-512 2.2.6
xmss-sha2-16-192 2021/04/xmldsig-more#xmss-sha2-16-192 2.2.6
xmss-sha2-16-256 2021/04/xmldsig-more#xmss-sha2-16-256 2.2.6
xmss-sha2-16-512 2021/04/xmldsig-more#xmss-sha2-16-512 2.2.6
xmss-sha2-20-192 2021/04/xmldsig-more#xmss-sha2-20-192 2.2.6
xmss-sha2-20-256 2021/04/xmldsig-more#xmss-sha2-20-256 2.2.6
xmss-sha2-20-512 2021/04/xmldsig-more#xmss-sha2-20-512 2.2.6
xmss-shake-10-256 2021/04/xmldsig-more#xmss-shake-10-256 2.2.6
xmss-shake-10-512 2021/04/xmldsig-more#xmss-shake-10-512 2.2.6
xmss-shake-16-256 2021/04/xmldsig-more#xmss-shake-16-256 2.2.6
xmss-shake-16-512 2021/04/xmldsig-more#xmss-shake-16-512 2.2.6
xmss-shake-20-256 2021/04/xmldsig-more#xmss-shake-20-256 2.2.6
xmss-shake-20-512 2021/04/xmldsig-more#xmss-shake-20-512 2.2.6
xmss-shake256-10-192 2021/04/xmldsig-more#xmss-shake256-10-192
2.2.6
xmss-shake256-10-256 2021/04/xmldsig-more#xmss-shake256-10-256
2.2.6
xmss-shake256-16-192 2021/04/xmldsig-more#xmss-shake256-16-192
2.2.6
xmss-shake256-16-256 2021/04/xmldsig-more#xmss-shake256-16-256
2.2.6
xmss-shake256-20-192 2021/04/xmldsig-more#xmss-shake256-20-192
2.2.6
xmss-shake256-20-256 2021/04/xmldsig-more#xmss-shake256-20-256
2.2.6
xmssmt-sha2-20-2-192 2021/04/xmldsig-more#xmssmt-sha2-20-2-192
2.2.6
xmssmt-sha2-20-2-256 2021/04/xmldsig-more#xmssmt-sha2-20-2-256
2.2.6
xmssmt-sha2-20-2-256 2021/04/xmldsig-more#xmssmt-sha2-20-2-512
2.2.6
xmssmt-sha2-20-4-192 2021/04/xmldsig-more#xmssmt-sha2-20-4-192
2.2.6
xmssmt-sha2-20-4-256 2021/04/xmldsig-more#xmssmt-sha2-20-4-256
2.2.6
xmssmt-sha2-20-4-256 2021/04/xmldsig-more#xmssmt-sha2-20-4-512
2.2.6
xmssmt-sha2-40-2-192 2021/04/xmldsig-more#xmssmt-sha2-40-2-192
2.2.6
xmssmt-sha2-40-2-256 2021/04/xmldsig-more#xmssmt-sha2-40-2-256
2.2.6
xmssmt-sha2-40-2-256 2021/04/xmldsig-more#xmssmt-sha2-40-2-512
2.2.6
xmssmt-sha2-40-4-192 2021/04/xmldsig-more#xmssmt-sha2-40-4-192
2.2.6
xmssmt-sha2-40-4-256 2021/04/xmldsig-more#xmssmt-sha2-40-4-256
2.2.6
xmssmt-sha2-40-4-256 2021/04/xmldsig-more#xmssmt-sha2-40-4-512
2.2.6
xmssmt-sha2-40-8-192 2021/04/xmldsig-more#xmssmt-sha2-40-8-192
2.2.6
xmssmt-sha2-40-8-256 2021/04/xmldsig-more#xmssmt-sha2-40-8-256
2.2.6
xmssmt-sha2-40-8-256 2021/04/xmldsig-more#xmssmt-sha2-40-8-512
2.2.6
xmssmt-sha2-60-3-192 2021/04/xmldsig-more#xmssmt-sha2-60-3-192
2.2.6
xmssmt-sha2-60-3-256 2021/04/xmldsig-more#xmssmt-sha2-60-3-256
2.2.6
xmssmt-sha2-60-3-256 2021/04/xmldsig-more#xmssmt-sha2-60-3-512
2.2.6
xmssmt-sha2-60-6-192 2021/04/xmldsig-more#xmssmt-sha2-60-6-192
2.2.6
xmssmt-sha2-60-6-256 2021/04/xmldsig-more#xmssmt-sha2-60-6-256
2.2.6
xmssmt-sha2-60-6-256 2021/04/xmldsig-more#xmssmt-sha2-60-6-512
2.2.6
xmssmt-sha2-60-12-192 2021/04/xmldsig-more#xmssmt-sha2-60-12-192
2.2.6
xmssmt-sha2-60-12-256 2021/04/xmldsig-more#xmssmt-sha2-60-12-256
2.2.6
xmssmt-sha2-60-12-256 2021/04/xmldsig-more#xmssmt-sha2-60-12-512
2.2.6
xmssmt-shake-20-2-256 2021/04/xmldsig-more#xmssmt-shake-20-2-256
2.2.6
xmssmt-shake-20-2-512 2021/04/xmldsig-more#xmssmt-shake-20-2-512
2.2.6
xmssmt-shake-20-4-256 2021/04/xmldsig-more#xmssmt-shake-20-4-256
2.2.6
xmssmt-shake-20-4-512 2021/04/xmldsig-more#xmssmt-shake-20-4-512
2.2.6
xmssmt-shake-40-2-256 2021/04/xmldsig-more#xmssmt-shake-40-2-256
2.2.6
xmssmt-shake-40-2-512 2021/04/xmldsig-more#xmssmt-shake-40-2-512
2.2.6
xmssmt-shake-40-4-256 2021/04/xmldsig-more#xmssmt-shake-40-4-256
2.2.6
xmssmt-shake-40-4-512 2021/04/xmldsig-more#xmssmt-shake-40-4-512
2.2.6
xmssmt-shake-40-8-256 2021/04/xmldsig-more#xmssmt-shake-40-8-256
2.2.6
xmssmt-shake-40-8-512 2021/04/xmldsig-more#xmssmt-shake-40-8-512
2.2.6
xmssmt-shake-60-3-256 2021/04/xmldsig-more#xmssmt-shake-60-3-256
2.2.6
xmssmt-shake-60-3-512 2021/04/xmldsig-more#xmssmt-shake-60-3-512
2.2.6
xmssmt-shake-60-6-256 2021/04/xmldsig-more#xmssmt-shake-60-6-256
2.2.6
xmssmt-shake-60-6-512 2021/04/xmldsig-more#xmssmt-shake-60-6-512
2.2.6
xmssmt-shake-60-12-256 2021/04/xmldsig-more#xmssmt-shake-20-12-256
2.2.6
xmssmt-shake-60-12-512 2021/04/xmldsig-more#xmssmt-shake-20-12-512
2.2.6
xmssmt-shake256-20-2-192
2021/04/xmldsig-more#xmssmt-shake256-20-2-192 2.2.6
xmssmt-shake256-20-2-256
2021/04/xmldsig-more#xmssmt-shake256-20-2-256 2.2.6
xmssmt-shake256-20-4-192
2021/04/xmldsig-more#xmssmt-shake256-20-4-192 2.2.6
xmssmt-shake256-20-4-256
2021/04/xmldsig-more#xmssmt-shake256-20-4-256 2.2.6
xmssmt-shake256-40-2-192
2021/04/xmldsig-more#xmssmt-shake256-40-2-192 2.2.6
xmssmt-shake256-40-2-256
2021/04/xmldsig-more#xmssmt-shake256-40-2-256 2.2.6
xmssmt-shake256-40-4-192
2021/04/xmldsig-more#xmssmt-shake256-40-4-192 2.2.6
xmssmt-shake256-40-4-256
2021/04/xmldsig-more#xmssmt-shake256-40-4-256 2.2.6
xmssmt-shake256-40-8-192
2021/04/xmldsig-more#xmssmt-shake256-40-8-192 2.2.6
xmssmt-shake256-40-8-256
2021/04/xmldsig-more#xmssmt-shake256-40-8-256 2.2.6
xmssmt-shake256-60-3-192
2021/04/xmldsig-more#xmssmt-shake256-60-3-192 2.2.6
xmssmt-shake256-60-3-256
2021/04/xmldsig-more#xmssmt-shake256-60-3-256 2.2.6
xmssmt-shake256-60-6-192
2021/04/xmldsig-more#xmssmt-shake256-60-6-192 2.2.6
xmssmt-shake256-60-6-256
2021/04/xmldsig-more#xmssmt-shake256-60-6-256 2.2.6
xmssmt-shake256-60-12-192
2021/04/xmldsig-more#xmssmt-shake256-60-12-192 2.2.6
xmssmt-shake256-60-12-256
2021/04/xmldsig-more#xmssmt-shake256-60-12-256 2.2.6
xptr 2001/04/xmldsig-more#xptr 2.5.1
--------- ---- --------
Fragment URI Sec/Doc
¶
The initial "http://www.w3.org/" part of the URI is not included above.¶
The initial "http://www.w3.org/" part of the URI is not included below. "{Bad}" indicates a Bad value that was accidentally included in RFC 6931. Implementations SHOULD only generate the correct URI but SHOULD understand both the correct and erroneous URI. See also Appendix B.¶
URI Sec/Doc Type
---- -------- ------
2000/09/xmldsig#base64 [RFC3275] Transform
2000/09/xmldsig#DSAKeyValue [RFC3275] Retrieval type
2000/09/xmldsig#dsa-sha1 [RFC3275] SignatureMethod
2000/09/xmldsig#enveloped-signature [RFC3275] Transform
2000/09/xmldsig#hmac-sha1 [RFC3275] SignatureMethod
2000/09/xmldsig#MgmtData [RFC3275] Retrieval type
2000/09/xmldsig#minimal 2.4 Canonicalization
2000/09/xmldsig#PGPData [RFC3275] Retrieval type
2000/09/xmldsig#rawX509Certificate [RFC3275] Retrieval type
2000/09/xmldsig#rsa-sha1 [RFC3275] SignatureMethod
2000/09/xmldsig#RSAKeyValue [RFC3275] Retrieval type
2000/09/xmldsig#sha1 [RFC3275] DigestAlgorithm
2000/09/xmldsig#SPKIData [RFC3275] Retrieval type
2000/09/xmldsig#X509Data [RFC3275] Retrieval type
2001/04/xmldsig-more#arcfour 2.6.1 EncryptionMethod
2001/04/xmldsig-more#camellia128-cbc 2.6.2 EncryptionMethod
2001/04/xmldsig-more#camellia192-cbc 2.6.2 EncryptionMethod
2001/04/xmldsig-more#camellia256-cbc 2.6.2 EncryptionMethod
2001/04/xmldsig-more#ecdsa-sha1 2.3.6 SignatureMethod
2001/04/xmldsig-more#ecdsa-sha224 2.3.6 SignatureMethod
2001/04/xmldsig-more#ecdsa-sha256 2.3.6 SignatureMethod
2001/04/xmldsig-more#ecdsa-sha384 2.3.6 SignatureMethod
2001/04/xmldsig-more#ecdsa-sha512 2.3.6 SignatureMethod
2001/04/xmldsig-more#esign-sha1 2.3.7 SignatureMethod
2001/04/xmldsig-more#esign-sha224 2.3.7 SignatureMethod
2001/04/xmldsig-more#esign-sha256 2.3.7 SignatureMethod
2001/04/xmldsig-more#esign-sha384 2.3.7 SignatureMethod
2001/04/xmldsig-more#esign-sha512 2.3.7 SignatureMethod
2001/04/xmldsig-more#hmac-md5 2.2.1 SignatureMethod
2001/04/xmldsig-more#hmac-ripemd160 2.2.3 SignatureMethod
2001/04/xmldsig-more#hmac-sha224 2.2.2 SignatureMethod
2001/04/xmldsig-more#hmac-sha256 2.2.2 SignatureMethod
2001/04/xmldsig-more#hmac-sha384 2.2.2 SignatureMethod
2001/04/xmldsig-more#hmac-sha512 2.2.2 SignatureMethod
2001/04/xmldsig-more#KeyName 3.2 Retrieval type
2001/04/xmldsig-more#KeyValue 3.2 Retrieval type
2001/04/xmldsig-more#kw-camellia128 2.6.3 EncryptionMethod
2001/04/xmldsig-more#kw-camellia192 2.6.3 EncryptionMethod
2001/04/xmldsig-more#kw-camellia256 2.6.3 EncryptionMethod
2001/04/xmldsig-more#md5 2.1.1 DigestAlgorithm
2001/04/xmldsig-more#PKCS7signedData 3.2 Retrieval type
2001/04/xmldsig-more#psec-kem 2.6.4 EncryptionMethod
2001/04/xmldsig-more#rawPGPKeyPacket 3.2 Retrieval type
2001/04/xmldsig-more#rawPKCS7signedData 3.2 Retrieval type
2001/04/xmldsig-more#rawSPKISexp 3.2 Retrieval type
2001/04/xmldsig-more#rawX509CRL 3.2 Retrieval type
2001/04/xmldsig-more#RetrievalMethod 3.2 Retrieval type
2001/04/xmldsig-more#rsa-md5 2.3.1 SignatureMethod
2001/04/xmldsig-more#rsa-sha224 2.3.11 SignatureMethod
2001/04/xmldsig-more#rsa-sha256 2.3.2 SignatureMethod
2001/04/xmldsig-more#rsa-sha384 2.3.3 SignatureMethod
2001/04/xmldsig-more#rsa-sha512 2.3.4 SignatureMethod
2001/04/xmldsig-more#rsa-ripemd160 2.3.5 SignatureMethod
2001/04/xmldsig-more#sha224 2.1.2 DigestAlgorithm
2001/04/xmldsig-more#sha384 2.1.3 DigestAlgorithm
2001/04/xmldsig-more#xptr 2.5.1 Transform
2001/04/xmldsig-more#PKCS7signedData 3.1 KeyInfo child
2001/04/xmlenc#aes128-cbc [XMLENC11] EncryptionMethod
2001/04/xmlenc#aes192-cbc [XMLENC11] EncryptionMethod
2001/04/xmlenc#aes256-cbc [XMLENC11] EncryptionMethod
2001/04/xmlenc#dh [XMLENC11] AgreementMethod
2001/04/xmlenc#kw-aes128 [XMLENC11] EncryptionMethod
2001/04/xmlenc#kw-aes192 [XMLENC11] EncryptionMethod
2001/04/xmlenc#kw-aes256 [XMLENC11] EncryptionMethod
2001/04/xmlenc#ripemd160 [XMLENC11] DigestAlgorithm
2001/04/xmlenc#rsa-1_5 [XMLENC11] EncryptionMethod
2001/04/xmlenc#rsa-oaep-mgf1p [XMLENC11] EncryptionMethod
2001/04/xmlenc#sha256 [XMLENC11] DigestAlgorithm
2001/04/xmlenc#sha512 [XMLENC11] DigestAlgorithm
2001/04/xmlenc#tripledes-cbc [XMLENC11] EncryptionMethod
2002/06/xmldsig-filter2 [XPATH] Transform
2002/07/decrypt#XML [DECRYPT] Transform
2002/07/decrypt#Binary [DECRYPT] Transform
2006/12/xmlc12n11# {Bad} [CANON11] Canonicalization
2006/12/xml-c14n11# [CANON11] Canonicalization
2006/12/xml-c14n11#WithComments [CANON11] Canonicalization
2007/05/xmldsig-more#ecdsa-ripemd160 2.3.6 SignatureMethod
2007/05/xmldsig-more#ecdsa-whirlpool 2.3.5 SignatureMethod
2007/05/xmldsig-more#kw-seed128 2.6.6 EncryptionMethod
2007/05/xmldsig-more#md2-rsa-MGF1 2.3.10 SignatureMethod
2007/05/xmldsig-more#md5-rsa-MGF1 2.3.10 SignatureMethod
2007/05/xmldsig-more#MGF1 2.3.9 SignatureMethod
2007/05/xmldsig-more#ripemd128-rsa-MGF1 2.3.10 SignatureMethod
2007/05/xmldsig-more#ripemd160-rsa-MGF1 2.3.10 SignatureMethod
2007/05/xmldsig-more#rsa-pss 2.3.9 SignatureMethod
2007/05/xmldsig-more#rsa-sha224 {Bad} 2.3.11 SignatureMethod
2007/05/xmldsig-more#rsa-whirlpool 2.3.5 SignatureMethod
2007/05/xmldsig-more#seed128-cbc 2.6.5 EncryptionMethod
2007/05/xmldsig-more#sha1-rsa-MGF1 2.3.10 SignatureMethod
2007/05/xmldsig-more#sha224-rsa-MGF1 2.3.10 SignatureMethod
2007/05/xmldsig-more#sha256-rsa-MGF1 2.3.10 SignatureMethod
2007/05/xmldsig-more#sha3-224 2.1.5 DigestAlgorithm
2007/05/xmldsig-more#sha3-224-rsa-MGF1 2.3.10 SignatureMethod
2007/05/xmldsig-more#sha3-256 2.1.5 DigestAlgorithm
2007/05/xmldsig-more#sha3-256-rsa-MGF1 2.3.10 SignatureMethod
2007/05/xmldsig-more#sha3-384 2.1.5 DigestAlgorithm
2007/05/xmldsig-more#sha3-384-rsa-MGF1 2.3.10 SignatureMethod
2007/05/xmldsig-more#sha3-512 2.1.5 DigestAlgorithm
2007/05/xmldsig-more#sha3-512-rsa-MGF1 2.3.10 SignatureMethod
2007/05/xmldsig-more#sha384-rsa-MGF1 2.3.10 SignatureMethod
2007/05/xmldsig-more#sha512-rsa-MGF1 2.3.10 SignatureMethod
2007/05/xmldsig-more#whirlpool 2.1.4 DigestAlgorithm
2007/05/xmldsig-more#whirlpool-rsa-MGF1 2.3.10 SignatureMethod
2009/xmlenc11#kw-aes-128-pad [XMLENC11] EncryptionMethod
2009/xmlenc11#kw-aes-192-pad [XMLENC11] EncryptionMethod
2009/xmlenc11#kw-aes-256-pad [XMLENC11] EncryptionMethod
2009/xmldsig11#dsa-sha256 [XMLDSIG11] SignatureMethod
2009/xmldsig11#ECKeyValue [XMLDSIG11] Retrieval type
2009/xmldsig11#DEREncodedKeyValue [XMLDSIG11] Retrieval type
2009/xmlenc11#aes128-gcm [XMLENC11] EncryptionMethod
2009/xmlenc11#aes192-gcm [XMLENC11] EncryptionMethod
2009/xmlenc11#aes256-gcm [XMLENC11] EncryptionMethod
2009/xmlenc11#ConcatKDF [XMLENC11] KeyDerivation
2009/xmlenc11#mgf1sha1 [XMLENC11] SignatureMethod
2009/xmlenc11#mgf1sha224 [XMLENC11] SignatureMethod
2009/xmlenc11#mgf1sha256 [XMLENC11] SignatureMethod
2009/xmlenc11#mgf1sha384 [XMLENC11] SignatureMethod
2009/xmlenc11#mgf1sha512 [XMLENC11] SignatureMethod
2009/xmlenc11#pbkdf2 [XMLENC11] KeyDerivation
2009/xmlenc11#rsa-oaep [XMLENC11] EncryptionMethod
2009/xmlenc11#ECDH-ES [XMLENC11] KeyDerivation
2009/xmlenc11#dh-es [XMLENC11] EncryptionMethod
2010/xmlsec-ghc#generic-hybrid [GENERIC] Generic Hybrid
2010/xmlsec-ghc#rsaes-kem [GENERIC] Generic Hybrid
2010/xmlsec-ghc#ecies-kem [GENERIC] Generic Hybrid
2021/04/xmldsig-more#chacha20 2.6.7 EncryptionMethod
2021/04/xmldsig-more#chacha20poly1305 2.6.8 EncryptionMethod
2021/04/xmldsig-more#ecdsa-sha3-224 2.3.6 SignatureMethod
2021/04/xmldsig-more#ecdsa-sha3-256 2.3.6 SignatureMethod
2021/04/xmldsig-more#ecdsa-sha3-384 2.3.6 SignatureMethod
2021/04/xmldsig-more#ecdsa-sha3-512 2.3.6 SignatureMethod
2021/04/xmldsig-more#eddsa-ed25519ph 2.3.12 SignatureMethod
2021/04/xmldsig-more#eddsa-ed25519ctx 2.3.12 SignatureMethod
2021/04/xmldsig-more#eddsa-ed25519 2.3.12 SignatureMethod
2021/04/xmldsig-more#eddsa-ed448 2.3.12 SignatureMethod
2021/04/xmldsig-more#eddsa-ed448ph 2.3.12 SignatureMethod
2021/04/xmldsig-more#hkdf 2.8.1 KeyDerivation
2021/04/xmldsig-more#po1y305 2.2.4 SignatureMethod
2021/04/xmldsig-more#siphash-2-4 2.2.5 SignatureMethod
2021/04/xmldsig-more#x25519 2.7.1 AgreementMethod
2021/04/xmldsig-more#x448 2.7.1 AgreementMethod
2021/04/xmldsig-more#xmss-sha2-10-192 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmss-sha2-10-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmss-sha2-10-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmss-sha2-16-192 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmss-sha2-16-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmss-sha2-16-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmss-sha2-20-192 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmss-sha2-20-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmss-sha2-20-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmss-shake-10-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmss-shake-10-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmss-shake-16-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmss-shake-16-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmss-shake-20-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmss-shake-20-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmss-shake256-10-192 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmss-shake256-10-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmss-shake256-16-192 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmss-shake256-16-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmss-shake256-20-192 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmss-shake256-20-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-20-2-192 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-20-2-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-20-2-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-20-4-192 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-20-4-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-20-4-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-40-2-192 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-40-2-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-40-2-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-40-4-192 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-40-4-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-40-4-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-40-8-192 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-40-8-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-40-8-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-60-3-192 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-60-3-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-60-3-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-60-6-192 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-60-6-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-60-6-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-60-12-192 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-60-12-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-sha2-60-12-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake-20-2-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake-20-2-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake-20-4-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake-20-4-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake-40-2-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake-40-2-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake-40-4-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake-40-4-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake-40-8-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake-40-8-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake-60-3-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake-60-3-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake-60-6-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake-60-6-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake-60-12-256 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake-60-12-512 2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake256-20-2-192
2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake256-20-2-256
2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake256-20-4-192
2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake256-20-4-256
2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake256-40-2-192
2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake256-40-2-256
2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake256-40-4-192
2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake256-40-4-256
2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake256-40-8-192
2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake256-40-8-256
2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake256-60-3-192
2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake256-60-3-256
2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake256-60-6-192
2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake256-60-6-256
2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake256-60-12-192
2.2.6 SignatureMethod
2021/04/xmldsig-more#xmssmt-shake256-60-12-256
2.2.6 SignatureMethod
TR/1999/REC-xpath-19991116 [XPATH] Transform
TR/1999/REC-xslt-19991116 [XSLT] Transform
TR/2001/10/xml-exc-c14n# [XCANON] Canonicalization
TR/2001/10/xml-exc-c14n#WithComments [XCANON] Canonicalization
TR/2001/REC-xml-c14n-20010315 [CANON10] Canonicalization
TR/2001/REC-xml-c14n-20010315#WithComments
[CANON10] Canonicalization
TR/2001/REC-xmlschema-1-20010502 [SCHEMA] Transform
---- -------- ------
URI Sec/Doc Type
¶
The initial "http://www.w3.org/" part of the URI is not included above. "{Bad}" indicates a Bad value that was accidentally included in RFC 6931. Implementations SHOULD only generate the correct URI but SHOULD understand both the correct and erroneous URI. See also Appendix B.¶
W3C and IANA allocation considerations are given below.¶
As it is easy for people to construct their own unique URIs [RFC3986] and, if appropriate, to obtain a URI from the W3C, additional URI specification under the following XMLSEC URI prefixes is prohibited as shown:¶
| URI | Status |
|---|---|
| http://www.w3.org/2000/09/xmldsig# | Frozen by W3C. |
| http://www.w3.org/2001/04/xmldsig-more# | Frozen with RFC 4051. |
| http://www.w3.org/2007/05/xmldsig-more# | Frozen with RFC 6931. |
The W3C has assigned <http://www.w3.org/tbd#> for additional new URIs specified in this document.¶
There are also occurrences in this document of <http://www.w3.org/2010/xmlsec-ghc#> due to the inclusion of some algorithms from [GENERIC] for convenience.¶
An "xmldsig-more" URI does not imply any official W3C or IETF status for these algorithms or identifiers nor does it imply that they are only useful in digital signatures. Currently, dereferencing such URIs may or may not produce a temporary placeholder document. Permission to use these URI prefixes has been given by the W3C.¶
IANA has established a registry entitled "XML Security URIs". IANA is requested to update its contents to correspond to Section 4.2 of this document with each section number in the "Sec/Doc" column augmented with a reference to this RFC (for example, "2.6.4" means "[this document], Section 2.6.4"). IANA is requested to update all references to [RFC9231] in that registry to [this document].¶
New entries, including new Types, will be added based on Specification Required [RFC8126]. Criteria for the designated expert for inclusion are (1) documentation sufficient for interoperability of the algorithm or data type and the XML syntax for its representation and use and (2) sufficient importance as normally indicated by inclusion in (2a) an approved W3C Note, Proposed Recommendation, or Recommendation, or (2b) an approved RFC.¶
Typically, the registry will reference a W3C or IETF document specifying such XML syntax; that document will either contain a more detailed description of the algorithm or data type or reference another document with a more detailed description.¶
This RFC is concerned with documenting the URIs that designate algorithms and some data types used in connection with XML security. The security considerations vary widely with the particular algorithms, and the general security considerations for XML security are outside of the scope of this document but appear in [XMLDSIG11], [XMLENC11], [CANON10], [CANON11], and [GENERIC].¶
[RFC6151] should be consulted before considering the use of MD5 as a DigestMethod or the use of HMAC-MD5 or RSA-MD5 as a SignatureMethod.¶
See [RFC6194] for SHA-1 security considerations.¶
Additional security considerations are given in connection with the description of some algorithms in the body of this document.¶
Implementers should be aware that cryptographic algorithms become weaker with time. As new cryptoanalysis techniques are developed and computing performance improves, the work factor to break a particular cryptographic algorithm will decrease. Therefore, cryptographic implementations should be modular, allowing new algorithms to be readily inserted. That is, implementers should be prepared for the set of mandatory-to-implement algorithms for any particular use to change over time. This is sometimes referred to as "algorithm agility" [RFC7696].¶
The following changes have been made in [RFC9231] to produce this document.¶
Corrected URIs as follows:¶
OLD => CORRECTED¶
2001/06/xml-exc-c14n# => 2001/10/xml-exc-c14n#¶
2001/06/xml-exc-c14n#WithComments => 2001/10/xml-exc-c14n#WithComments¶
2006/12/xmlc14n11# => 2006/12/xml-c14n11$¶
2006/12/xmlc14n11#WithComments => 2006/12/xml-c14n11#WithComments¶
| Section | Algorithm(s) |
|---|---|
| tbd | tbd |
RFC 6931 included two bad URIs as shown below. "{Bad}" in the indexes (Sections 4.1 and 4.2) indicates such a bad value. Implementations SHOULD only generate the correct URI but SHOULD understand both the correct and erroneous URI.¶
2006/12/xmlc12n11#¶
2007/05/xmldsig-more#rsa-sha224¶
The following XML schema summarizes the XML elements and types in the http://www.w3.org/2001/04/xmldsig-more# namespace.¶
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:vc="http://www.w3.org/2007/XMLSchema-versioning"
elementFormDefault="qualified"
vc:minVersion="1.1"
xmlns:rfc4051="http://www.w3.org/2001/04/xmldsig-more#"
targetNamespace="http://www.w3.org/2001/04/xmldsig-more#">
<!-- Added in section 3.1 of this specification -->
<xs:element name="PKCS7signedData" type="xs:base64Binary"/>
</xs:schema>
¶
The following XML schema summarizes the XML elements and types in the https://www.w3.org/2007/05/xmldsig-more# namespace.¶
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:vc="http://www.w3.org/2007/XMLSchema-versioning"
elementFormDefault="qualified"
vc:minVersion="1.1"
xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
xmlns:rfc6931="https://www.w3.org/2007/05/xmldsig-more#"
targetNamespace="https://www.w3.org/2007/05/xmldsig-more#">
<xs:import namespace="http://www.w3.org/2001/XMLSchema"
schemaLocation=
"https://www.w3.org/2009/XMLSchema/XMLSchema.xsd"/>
<xs:import namespace="http://www.w3.org/2000/09/xmldsig#"
schemaLocation=
"http://www.w3.org/TR/2008/REC-xmldsig-core-20080610/xmldsig-core-schema.xsd"
/>
<!-- Added in section 2.3.9 -->
<xs:element name="RSAPSSParams" type="rfc6931:RSAPSSParamsType">
<xs:annotation>
<xs:documentation>Top level element that can be used in
xs:any namespace="#other" wildcard of ds:SignatureMethod
content. </xs:documentation>
</xs:annotation>
</xs:element>
<xs:complexType name="RSAPSSParamsType">
<xs:sequence>
<xs:element ref="ds:DigestMethod" minOccurs="0"/>
<xs:element name="MaskGenerationFunction"
type="rfc6931:MaskGenerationFunctionType"
minOccurs="0"/>
<xs:element
name="SaltLength" type="xs:int" minOccurs="0"/>
<xs:element
name="TrailerField" type="xs:int" minOccurs="0"/>
</xs:sequence>
</xs:complexType>
<xs:complexType name="MaskGenerationFunctionType">
<xs:sequence>
<xs:element ref="ds:DigestMethod" minOccurs="0"/>
</xs:sequence>
<xs:attribute name="Algorithm" type="xs:anyURI"
default="http://www.w3.org/2007/05/xmldsig-more#MGF1"/>
</xs:complexType>
</xs:schema>
¶
The following XML schema summarizes the XML elements and types in the http://www.w3.org/2021/04/xmldsig-more# namespace.¶
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:vc=
"http://www.w3.org/2007/XMLSchema-versioning"
elementFormDefault="qualified"
vc:minVersion="1.1"
xmlns:rfc9231="http://www.w3.org/2021/04/xmldsig-more#"
xmlns:xenc11="http://www.w3.org/2009/xmlenc11#"
targetNamespace="http://www.w3.org/2021/04/xmldsig-more#">
<xs:import namespace="http://www.w3.org/2001/XMLSchema"
schemaLocation="https://www.w3.org/2009/XMLSchema/XMLSchema.xsd"/>
<xs:import namespace="http://www.w3.org/2009/xmlenc11#"
schemaLocation=
"https://www.w3.org/TR/xmlenc-core1/xenc-schema-11.xsd"/>
<!-- Needed for 2.6.7 -->
<xs:element name="Nonce" type="xs:hexBinary"/>
<xs:element name="Counter" type="xs:hexBinary"/>
<!-- Needed for 2.6.8 -->
<xs:element name="ADD" type="xs:string"/>
<!-- Added in section 2.8.1 -->
<xs:element name="HKDFParams" type="rfc9231:HKDFParamsType"/>
<xs:complexType name="HKDFParamsType">
<xs:sequence>
<xs:element name="PRF"
type="xenc11:PRFAlgorithmIdentifierType"/>
<xs:element name="Salt" minOccurs="0" maxOccurs="1"
type="xs:base64Binary"/>
<xs:element name="Info" minOccurs="0" maxOccurs="1"
type="xs:base64Binary"/>
<xs:element name="KeyLength" minOccurs="0" maxOccurs="1"
type="xs:positiveInteger"/>
</xs:sequence>
</xs:complexType>
</xs:schema>
¶
The contributions of the following, listed in alphabetic order, to this document are gratefully acknowledged:¶
Bogdan Dumitriu, Pim van der Eijk, Joze Rihtarsic, Jost Rossel, and Juraj Somorovsky¶
The contribution of the following to [RFC9231] is gratefully acknowledged: Andrey Kislyuk.¶
The contributions of the following, listed in alphabetic order, by reporting errata against RFC 6931 or contributing to this document, are gratefully acknowledged:¶
Roman Danyliw, Pim van der Eijk, Frederick Hirsch, Benjamin Kaduk, Alexey Melnikov, Gayle Noble, Axel Puhlmann, Juraj Somorovsky, Peter Yee, and Annie Yousar.¶
The contributions of the following, listed in alphabetic order, to RFC 6931, on which this document is based, are gratefully acknowledged:¶
Benoit Claise, Adrian Farrel, Stephen Farrell, Ernst Giessmann, Frederick Hirsch, Björn Höhrmann, Russ Housley, Satoru Kanno, Charlie Kaufman, Konrad Lanz, HwanJin Lee, Barry Leiba, Peter Lipp, Subramanian Moonesamy, Thomas Roessler, Hanseong Ryu, Peter Saint-Andre, and Sean Turner.¶