CMP Algorithms
draft-ietf-lamps-cmp-algorithms-02
The information below is for an old version of the document.
| Document | Type |
This is an older version of an Internet-Draft that was ultimately published as RFC 9481.
|
|
|---|---|---|---|
| Authors | Hendrik Brockhaus , Hans Aschauer , Mike Ounsworth , Serge Mister | ||
| Last updated | 2021-01-20 | ||
| RFC stream | Internet Engineering Task Force (IETF) | ||
| Formats | |||
| Reviews |
GENART Last Call review
(of
-12)
by Dan Romascanu
Ready w/nits
|
||
| Additional resources | Mailing list discussion | ||
| Stream | WG state | WG Document | |
| Associated WG milestone |
|
||
| Document shepherd | (None) | ||
| IESG | IESG state | Became RFC 9481 (Proposed Standard) | |
| Consensus boilerplate | Unknown | ||
| Telechat date | (None) | ||
| Responsible AD | (None) | ||
| Send notices to | (None) |
draft-ietf-lamps-cmp-algorithms-02
LAMPS Working Group H. Brockhaus, Ed.
Internet-Draft H. Aschauer
Updates: 4210 (if approved) Siemens
Intended status: Standards Track M. Ounsworth
Expires: 24 July 2021 S. Mister
Entrust
20 January 2021
CMP Algorithms
draft-ietf-lamps-cmp-algorithms-02
Abstract
This document describes the conventions for using concrete
cryptographic algorithms with the Certificate Management Protocol
(CMP). CMP is used to enroll and further manage the lifecycle of
X.509 certificates.
Status of This Memo
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 24 July 2021.
Copyright Notice
Copyright (c) 2021 IETF Trust and the persons identified as the
document authors. All rights reserved.
Brockhaus, et al. Expires 24 July 2021 [Page 1]
Internet-Draft CMP Algorithms January 2021
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.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
2. Message Digest Algorithms . . . . . . . . . . . . . . . . . . 3
2.1. SHA2 . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2. SHAKE . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Signature Algorithms . . . . . . . . . . . . . . . . . . . . 4
3.1. RSA . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2. ECDSA . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.3. EdDSA . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4. Key Management Algorithms . . . . . . . . . . . . . . . . . . 7
4.1. Key Agreement Algorithms . . . . . . . . . . . . . . . . 7
4.1.1. Diffie-Hellman . . . . . . . . . . . . . . . . . . . 8
4.1.2. ECDH . . . . . . . . . . . . . . . . . . . . . . . . 8
4.2. Key Transport Algorithms . . . . . . . . . . . . . . . . 10
4.2.1. RSA . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.3. Symmetric Key-Encryption Algorithms . . . . . . . . . . . 11
4.3.1. AES Key Wrap . . . . . . . . . . . . . . . . . . . . 11
4.4. Key Derivation Algorithms . . . . . . . . . . . . . . . . 12
4.4.1. Password-based Key Derivation Function 2 . . . . . . 12
5. Content Encryption Algorithms . . . . . . . . . . . . . . . . 12
5.1. AES-CBC . . . . . . . . . . . . . . . . . . . . . . . . . 13
6. Message Authentication Code Algorithms . . . . . . . . . . . 13
6.1. Password-based MAC . . . . . . . . . . . . . . . . . . . 13
6.1.1. PasswordBasedMac . . . . . . . . . . . . . . . . . . 13
6.1.2. PBMAC1 . . . . . . . . . . . . . . . . . . . . . . . 14
6.2. Symmetric-key-based MAC . . . . . . . . . . . . . . . . . 14
6.2.1. SHA2-based HMAC . . . . . . . . . . . . . . . . . . . 14
6.2.2. AES-GMAC . . . . . . . . . . . . . . . . . . . . . . 15
6.2.3. SHAKE-based KMAC . . . . . . . . . . . . . . . . . . 15
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 16
8. Security Considerations . . . . . . . . . . . . . . . . . . . 16
9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 16
10. Normative References . . . . . . . . . . . . . . . . . . . . 16
11. Informative References . . . . . . . . . . . . . . . . . . . 20
Appendix A. Algorithm Use Profiles . . . . . . . . . . . . . . . 21
A.1. Algorithm selection guideline . . . . . . . . . . . . . . 21
A.2. Algorithm Profile for PKI Management Message Profiles . . 21
Brockhaus, et al. Expires 24 July 2021 [Page 2]
Internet-Draft CMP Algorithms January 2021
A.3. Algorithm Profile for Lightweight CMP Profile . . . . . . 23
Appendix B. History of changes . . . . . . . . . . . . . . . . . 25
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 27
1. Introduction
[RFC Editor: please delete]: !!! The change history was moved to
Appendix B !!!
1.1. Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD 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.
2. Message Digest Algorithms
This section provides references to object identifiers and
conventions to be employed by CMP implementations that support SHA2
or SHAKE message digest algorithms.
Digest algorithm identifiers are located in the hashAlg field of
OOBCertHash, the owf field of Challenge, PBMParameter, and
DHBMParameter, and the digestAlgorithms field of SignedData and the
digestAlgorithm field of SignerInfo.
Digest values are located in the hashVal field of OOBCertHash, the
witness field of Challenge, and the certHash field of CertStatus. In
addition, digest values are input to signature algorithms.
2.1. SHA2
The SHA2 algorithm family is defined in FIPS Pub 180-4
[NIST.FIPS.180-4].
The message digest algorithms SHA-224, SHA-256, SHA-384, and SHA-512
are identified by the following OIDs:
Brockhaus, et al. Expires 24 July 2021 [Page 3]
Internet-Draft CMP Algorithms January 2021
id-sha224 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) country(16)
us(840) organization(1) gov(101) csor(3) nistalgorithm(4)
hashalgs(2) 4 }
id-sha256 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) country(16)
us(840) organization(1) gov(101) csor(3) nistalgorithm(4)
hashalgs(2) 1 }
id-sha384 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) country(16)
us(840) organization(1) gov(101) csor(3) nistalgorithm(4)
hashalgs(2) 2 }
id-sha512 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) country(16)
us(840) organization(1) gov(101) csor(3) nistalgorithm(4)
hashalgs(2) 3 }
Specific conventions to be considered are specified in RFC 5754
Section 2 [RFC5754].
2.2. SHAKE
The SHAKE algorithm family is defined in FIPS Pub 202
[NIST.FIPS.202].
The message digest algorithms SHAKE128 and SHAKE256 are identified by
the following OIDs:
id-shake128 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) country(16)
us(840) organization(1) gov(101) csor(3) nistAlgorithm(4)
hashalgs(2) 11 }
id-shake256 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) country(16)
us(840) organization(1) gov(101) csor(3) nistAlgorithm(4)
hashalgs(2) 12 }
Specific conventions to be considered are specified in RFC 8702
Section 3.1 [RFC8702].
3. Signature Algorithms
This section provides references to object identifiers and
conventions to be employed by CMP implementations that support RSA,
ECDSA, or EdDSA signature algorithms.
The signature algorithm is referred to as MSG_SIG_ALG in RFC 4210
Appendix D and E [RFC4210] and in the Lightweight CMP Profile
[I-D.ietf-lamps-lightweight-cmp-profile].
Signature algorithm identifiers are located in the protectionAlg
field of PKIHeader, the algorithmIdentifier field of POPOSigningKey,
signatureAlgorithm field of CertificationRequest, SignKeyPairTypes,
and the SignerInfo signatureAlgorithm field of SignedData.
Brockhaus, et al. Expires 24 July 2021 [Page 4]
Internet-Draft CMP Algorithms January 2021
Signature values are located in the protection field of PKIMessage,
signature field of POPOSigningKey, signature field of
CertificationRequest, and SignerInfo signature field of SignedData.
3.1. RSA
The RSA (RSASSA-PSS and PKCS#1 version 1.5) signature algorithm is
defined in RFC 8017 [RFC8017].
The algorithm identifiers for RSASAA-PSS signatures used with SHA2
message digest algorithms is identified by the following OID:
id-RSASSA-PSS OBJECT IDENTIFIER ::= { iso(1) member-body(2)
us(840) rsadsi(113549) pkcs(1) pkcs-1(1) 10 }
Specific conventions to be considered are specified in RFC 4056
[RFC4056].
The signature algorithm RSASSA-PSS used with SHAKE message digest
algorithms are identified by the following OIDs:
id-RSASSA-PSS-SHAKE128 OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) dod(6) internet(1) security(5)
mechanisms(5) pkix(7) algorithms(6) 30 }
id-RSASSA-PSS-SHAKE256 OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) dod(6) internet(1) security(5)
mechanisms(5) pkix(7) algorithms(6) 31 }
Specific conventions to be considered are specified in RFC 8702
Section 3.2.1 [RFC8702].
The signature algorithm PKCS#1 version 1.5 used with SHA2 message
digest algorithms is identified by the following OIDs:
sha224WithRSAEncryption OBJECT IDENTIFIER ::= { iso(1)
member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-1(1) 14 }
sha256WithRSAEncryption OBJECT IDENTIFIER ::= { iso(1)
member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-1(1) 11 }
sha384WithRSAEncryption OBJECT IDENTIFIER ::= { iso(1)
member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-1(1) 12 }
sha512WithRSAEncryption OBJECT IDENTIFIER ::= { iso(1)
member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-1(1) 13 }
Specific conventions to be considered are specified in RFC 5754
Section 3.2 [RFC5754].
Brockhaus, et al. Expires 24 July 2021 [Page 5]
Internet-Draft CMP Algorithms January 2021
3.2. ECDSA
The ECDSA signature algorithm is defined in FIPS Pub 186-4
[NIST.FIPS.186-4].
The signature algorithm ECDSA used with SHA2 message digest
algorithms is identified by the following OIDs:
ecdsa-with-SHA224 OBJECT IDENTIFIER ::= { iso(1) member-body(2)
us(840) ansi-X9-62(10045) signatures(4) ecdsa-with-SHA2(3) 1 }
ecdsa-with-SHA256 OBJECT IDENTIFIER ::= { iso(1) member-body(2)
us(840) ansi-X9-62(10045) signatures(4) ecdsa-with-SHA2(3) 2 }
ecdsa-with-SHA384 OBJECT IDENTIFIER ::= { iso(1) member-body(2)
us(840) ansi-X9-62(10045) signatures(4) ecdsa-with-SHA2(3) 3 }
ecdsa-with-SHA512 OBJECT IDENTIFIER ::= { iso(1) member-body(2)
us(840) ansi-X9-62(10045) signatures(4) ecdsa-with-SHA2(3) 4 }
As specified in RFC 5480 [RFC5480] the NIST-recommended SECP curves
are identified by the following OIDs:
secp192r1 OBJECT IDENTIFIER ::= { iso(1) member-body(2)
us(840) ansi-X9-62(10045) curves(3) prime(1) 1 }
secp224r1 OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) certicom(132) curve(0) 33 }
secp256r1 OBJECT IDENTIFIER ::= { iso(1) member-body(2)
us(840) ansi-X9-62(10045) curves(3) prime(1) 7 }
secp384r1 OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) certicom(132) curve(0) 34 }
secp521r1 OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) certicom(132) curve(0) 35 }
Specific conventions to be considered are specified in RFC 5754
Section 3.3 [RFC5754].
The signature algorithm ECDSA used with SHAKE message digest
algorithms are identified by the following OIDs:
id-ecdsa-with-shake128 OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) dod(6) internet(1) security(5)
mechanisms(5) pkix(7) algorithms(6) 32 }
id-ecdsa-with-shake256 OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) dod(6) internet(1) security(5)
mechanisms(5) pkix(7) algorithms(6) 33 }
Specific conventions to be considered are specified in RFC 8702
Section 3.2.2 [RFC8702].
Brockhaus, et al. Expires 24 July 2021 [Page 6]
Internet-Draft CMP Algorithms January 2021
3.3. EdDSA
The EdDSA signature algorithm is defined in RFC 8032 Section 3.3
[RFC8032] and FIPS Pub 186-5 (Draft) [NIST.FIPS.186-5].
The signature algorithm Ed25519 MUST be used with SHA-512 message
digest algorithms is identified by the following OIDs:
id-Ed25519 OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) thawte(101) 112 }
The signature algorithm Ed448 MUST be used with SHAKE256 message
digest algorithms is identified by the following OIDs:
id-Ed448 OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) thawte(101) 113 }
Specific conventions to be considered are specified in RFC 8419
[RFC8419].
4. Key Management Algorithms
CMP utilizes the following general key management techniques: key
agreement, key transport, and passwords.
CRMF [RFC4211] and CMP Updates [I-D.ietf-lamps-cmp-updates] promotes
the use of CMS [RFC5652] EnvelopedData by deprecating the use of
EncryptedValue.
4.1. Key Agreement Algorithms
The key agreement algorithm is referred to as PROT_ENC_ALG in
RFC 4210 Appendix D and E [RFC4210] and in the Lightweight CMP
Profile [I-D.ietf-lamps-lightweight-cmp-profile].
Key agreement algorithms are only used in CMP when using CMS
[RFC5652] EnvelopedData together with the key agreement key
management technique. When a key agreement algorithm is used, a key-
encryption algorithm (Section 4.3) is needed next to the content-
encryption algorithm (Section 5).
Key agreement algorithm identifiers are located in the EnvelopedData
RecipientInfos KeyAgreeRecipientInfo keyEncryptionAlgorithm fields.
Key encryption algorithm identifiers are located in the EnvelopedData
RecipientInfos KeyAgreeRecipientInfo keyEncryptionAlgorithm field.
Brockhaus, et al. Expires 24 July 2021 [Page 7]
Internet-Draft CMP Algorithms January 2021
Wrapped content-encryption keys are located in the EnvelopedData
RecipientInfos KeyAgreeRecipientInfo RecipientEncryptedKeys
encryptedKey field.
4.1.1. Diffie-Hellman
Diffie-Hellman key agreement is defined in RFC 2631 [RFC2631] and
SHALL be used in the ephemeral-static as specified in RFC 3370
[RFC3370]. Static-static variants SHALL NOT be used.
The Diffie-Hellman key agreement algorithm is identified by the
following OID:
id-alg-ESDH OBJECT IDENTIFIER ::= { iso(1) member-body(2)
us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) alg(3) 5 }
Specific conventions to be considered are specified in RFC 3370
Section 4.1 [RFC3370].
4.1.2. ECDH
Elliptic Curve Diffie-Hellman (ECDH) key agreement is defined in
RFC 5753 [RFC5753] and SHALL be used in the ephemeral-static variant
as specified in RFC 5753 [RFC5753] or the 1-Pass ECMQV variant as
specified in RFC 5753 [RFC5753]. Static-static variants SHALL NOT be
used.
The ECDH key agreement algorithm used together with NIST-recommended
SECP curves are identified by the following OIDs:
Brockhaus, et al. Expires 24 July 2021 [Page 8]
Internet-Draft CMP Algorithms January 2021
dhSinglePass-stdDH-sha224kdf-scheme OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) certicom(132) schemes(1) 11(11) 0 }
dhSinglePass-stdDH-sha256kdf-scheme OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) certicom(132) schemes(1) 11(11) 1 }
dhSinglePass-stdDH-sha384kdf-scheme OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) certicom(132) schemes(1) 11(11) 2 }
dhSinglePass-stdDH-sha512kdf-scheme OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) certicom(132) schemes(1) 11(11) 3 }
dhSinglePass-cofactorDH-sha224kdf-scheme OBJECT IDENTIFIER ::= {
iso(1) identified-organization(3) certicom(132) schemes(1)
14(14) 0 }
dhSinglePass-cofactorDH-sha256kdf-scheme OBJECT IDENTIFIER ::= {
iso(1) identified-organization(3) certicom(132) schemes(1)
14(14) 1 }
dhSinglePass-cofactorDH-sha384kdf-scheme OBJECT IDENTIFIER ::= {
iso(1) identified-organization(3) certicom(132) schemes(1)
14(14) 2 }
dhSinglePass-cofactorDH-sha512kdf-scheme OBJECT IDENTIFIER ::= {
iso(1) identified-organization(3) certicom(132) schemes(1)
14(14) 3 }
mqvSinglePass-sha224kdf-scheme OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) certicom(132) schemes(1) 15(15) 0 }
mqvSinglePass-sha256kdf-scheme OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) certicom(132) schemes(1) 15(15) 1 }
mqvSinglePass-sha384kdf-scheme OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) certicom(132) schemes(1) 15(15) 2 }
mqvSinglePass-sha512kdf-scheme OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) certicom(132) schemes(1) 15(15) 3 }
As specified in RFC 5480 [RFC5480] the NIST-recommended SECP curves
are identified by the following OIDs:
secp192r1 OBJECT IDENTIFIER ::= { iso(1) member-body(2)
us(840) ansi-X9-62(10045) curves(3) prime(1) 1 }
secp224r1 OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) certicom(132) curve(0) 33 }
secp256r1 OBJECT IDENTIFIER ::= { iso(1) member-body(2)
us(840) ansi-X9-62(10045) curves(3) prime(1) 7 }
secp384r1 OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) certicom(132) curve(0) 34 }
secp521r1 OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) certicom(132) curve(0) 35 }
Specific conventions to be considered are specified in RFC 5753
[RFC5753].
The ECDH key agreement algorithm used together with curve25519 or
curve448 are identified by the following OIDs:
Brockhaus, et al. Expires 24 July 2021 [Page 9]
Internet-Draft CMP Algorithms January 2021
id-X25519 OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) thawte(101) 110 }
id-X448 OBJECT IDENTIFIER ::= { iso(1)
identified-organization(3) thawte(101) 111 }
Specific conventions to be considered are specified in RFC 8418
[RFC8418].
4.2. Key Transport Algorithms
The key transport algorithm is also referred to as PROT_ENC_ALG in
RFC 4210 Appendix D and E [RFC4210] and in the Lightweight CMP
Profile [I-D.ietf-lamps-lightweight-cmp-profile].
Key transport algorithms are only used in CMP when using CMS
[RFC5652] EnvelopedData together with the key transport key
management technique.
Key transport algorithm identifiers are located in the EnvelopedData
RecipientInfos KeyTransRecipientInfo keyEncryptionAlgorithm field.
Key transport encrypted content-encryption keys are located in the
EnvelopedData RecipientInfos KeyTransRecipientInfo encryptedKey
field.
4.2.1. RSA
The RSA key transport algorithm is the RSA encryption scheme defined
in RFC 8017 [RFC8017].
The algorithm identifier for RSA (PKCS #1 v1.5) is
rsaEncryption OBJECT IDENTIFIER ::= { iso(1) member-body(2)
us(840) rsadsi(113549) pkcs(1) pkcs-1(1) 1 }
The algorithm identifier for RSAES-OAEP is:
id-RSAES-OAEP OBJECT IDENTIFIER ::= { iso(1) member-body(2)
us(840) rsadsi(113549) pkcs(1) pkcs-1(1) 7 }
Further conventions to be considered for PKCS #1 v1.5 are specified
in RFC 3370 Section 4.2.1 [RFC3370] and for RSAES-OAEP in RFC 3560
[RFC3560].
Brockhaus, et al. Expires 24 July 2021 [Page 10]
Internet-Draft CMP Algorithms January 2021
4.3. Symmetric Key-Encryption Algorithms
The symmetric key-encryption algorithm is also referred to as
PROT_SYM_ALG in RFC 4210 Appendix D and E [RFC4210] and in the
Lightweight CMP Profile [I-D.ietf-lamps-lightweight-cmp-profile].
As symmetric key-encryption key management technique is not used by
CMP, the symmetric key-encryption algorithm is only needed when using
the key agreement or password-based key management technique with CMS
[RFC5652] EnvelopedData.
Key-encryption algorithm identifiers are located in the EnvelopedData
RecipientInfos KeyAgreeRecipientInfo keyEncryptionAlgorithm and
EnvelopedData RecipientInfos PasswordRecipientInfo
keyEncryptionAlgorithm fields.
Wrapped content-encryption keys are located in the EnvelopedData
RecipientInfos KeyAgreeRecipientInfo RecipientEncryptedKeys
encryptedKey and EnvelopedData RecipientInfos PasswordRecipientInfo
encryptedKey fields.
4.3.1. AES Key Wrap
The AES encryption algorithm is defined in FIPS Pub 197
[NIST.FIPS.197] and the key wrapping is defined in RFC 3394
[RFC3394].
AES key encryption has the algorithm identifier:
id-aes128-wrap OBJECT IDENTIFIER ::= { joint-iso-itu-t(2)
country(16) us(840) organization(1) gov(101) csor(3)
nistAlgorithm(4) aes(1) 5 }
id-aes192-wrap OBJECT IDENTIFIER ::= { joint-iso-itu-t(2)
country(16) us(840) organization(1) gov(101) csor(3)
nistAlgorithm(4) aes(1) 25 }
id-aes256-wrap OBJECT IDENTIFIER ::= { joint-iso-itu-t(2)
country(16) us(840) organization(1) gov(101) csor(3)
nistAlgorithm(4) aes(1) 45 }
The underlying encryption functions for the key wrap and content-
encryption algorithms (as specified in Section 5) and the key sizes
for the two algorithms MUST be the same (e.g., AES-128 key wrap
algorithm with AES-128 content-encryption algorithm), see also
RFC 8551 [RFC8551].
Further conventions to be considered for AES key wrap are specified
in RFC 3394 Section 2.2 [RFC3394] and RFC 3565 Section 2.3.2
[RFC3565].
Brockhaus, et al. Expires 24 July 2021 [Page 11]
Internet-Draft CMP Algorithms January 2021
4.4. Key Derivation Algorithms
Key derivation algorithms are only used in CMP when using CMS
[RFC5652] EnvelopedData together with password-based key management
technique.
Key derivation algorithm identifiers are located in the EnvelopedData
RecipientInfos PasswordRecipientInfo keyDerivationAlgorithm field.
When using the password-based key management technique with
EnvelopedData as specified in CMP Updates together with MAC-based
PKIProtection, a different salt MUST be used with the password-based
MAC and KDF to ensure usage of different symmetric keys.
4.4.1. Password-based Key Derivation Function 2
The password-based key derivation function 2 (PBKDF2) is defined in
RFC 8018 [RFC8018].
Password-based key derivation function 2 has the algorithm
identifier:
id-PBKDF2 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840)
rsadsi(113549) pkcs(1) pkcs-5(5) 12 }
Further conventions to be considered for PBKDF2 are specified in
RFC 3370 Section 4.4.1 [RFC3370] and RFC 8018 Section 5.2 [RFC8018].
5. Content Encryption Algorithms
The content encryption algorithm is also referred to as PROT_SYM_ALG
in RFC 4210 Appendix D and E [RFC4210] and in the Lightweight CMP
Profile [I-D.ietf-lamps-lightweight-cmp-profile].
Content encryption algorithms are only used in CMP when using CMS
[RFC5652] EnvelopedData to transport a signed private key package in
case of central key generation or key archiving, a certificate to
facilitate implicit prove-of-possession, or a revocation passphrase
in encrypted form.
Content encryption algorithm identifiers are located in the
EnvelopedData EncryptedContentInfo contentEncryptionAlgorithm field.
Encrypted content is located in the EnvelopedData
EncryptedContentInfo encryptedContent field.
Brockhaus, et al. Expires 24 July 2021 [Page 12]
Internet-Draft CMP Algorithms January 2021
5.1. AES-CBC
The AES encryption algorithm is defined in FIPS Pub 197
[NIST.FIPS.197].
AES-CBC content encryption has the algorithm identifier:
id-aes128-CBC OBJECT IDENTIFIER ::= { joint-iso-itu-t(2)
country(16) us(840) organization(1) gov(101) csor(3)
nistAlgorithm(4) aes(1) 2 }
id-aes192-CBC OBJECT IDENTIFIER ::= { joint-iso-itu-t(2)
country(16) us(840) organization(1) gov(101) csor(3)
nistAlgorithm(4) aes(1)22 }
id-aes256-CBC OBJECT IDENTIFIER ::= { joint-iso-itu-t(2)
country(16) us(840) organization(1) gov(101) csor(3)
nistAlgorithm(4) aes(1)42 }
Specific conventions to be considered for AES-CBC content encryption
are specified in RFC 3565 [RFC3565].
6. Message Authentication Code Algorithms
The message authentication code is either used for shared-secret-
based CMP message protection or together with the password-based key
derivation function (PBKDF2).
The message authentication code algorithm is also referred to as
MSG_MAC_ALG in RFC 4210 Appendix D and E [RFC4210] and in the
Lightweight CMP Profile [I-D.ietf-lamps-lightweight-cmp-profile].
6.1. Password-based MAC
Password-based MAC algorithms combine the derivation of a symmetric-
key from a password and a symmetric-key-based MAC function as
specified in Section 6.2 using this derived key.
Message authentication code algorithm identifiers are located in the
protectionAlg field of PKIHeader.
Message authentication code values are located in the PKIProtection
field.
6.1.1. PasswordBasedMac
The PasswordBasedMac algorithm is defined in RFC 4210 Section 5.1.3.1
[RFC4210] and Algorithm Requirements Update to the Internet X.509
Public Key Infrastructure Certificate Request Message Format (CRMF)
[I-D.ietf.lamps-crmf-update-algs].
Brockhaus, et al. Expires 24 July 2021 [Page 13]
Internet-Draft CMP Algorithms January 2021
The PasswordBasedMac algorithm is identified by the following OID:
id-PasswordBasedMac OBJECT IDENTIFIER ::= { iso(1) member-body(2)
us(840) nt(113533) nsn(7) algorithms(66) 13 }
Further conventions to be considered for password-based MAC are
specified in RFC 4210 Section 5.1.3.1 [RFC4210] and Algorithm
Requirements Update to the Internet X.509 Public Key Infrastructure
Certificate Request Message Format (CRMF)
[I-D.ietf.lamps-crmf-update-algs].
6.1.2. PBMAC1
The password-based message authentication code 1 (PBMAC1) is defined
in RFC 8018 [RFC8018]. PBMAC1 combines a password-based key
derivation function like PBKDF2 (Section 4.4.1) with an underlying
message authentication scheme.
PBMAC1 has the following OID:
id-PBKDF2 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840)
rsadsi(113549) pkcs(1) pkcs-5(5) 12 }
Specific conventions to be considered for PBMAC1 are specified in
RFC 8018 Section 7.1 and A.5 [RFC8018].
6.2. Symmetric-key-based MAC
Symmetric-key-based MAC algorithms are used for deriving the
symmetric encryption key when using PBKDF2 as described in
Section 4.4.1.
Message authentication code algorithm identifiers are located in the
protectionAlg field of PKIHeader, the mac field of PBMParameter, the
messageAuthScheme field of PBMAC1, and the prf field of
PBKDF2-params.
Message authentication code values are located in the PKIProtection
field.
6.2.1. SHA2-based HMAC
The HMAC algorithm is defined in RFC 2104 [RFC2104] and
FIPS Pub 198-1 [NIST.FIPS.198-1].
The HMAC algorithm used with SHA2 message digest algorithms is
identified by the following OIDs:
Brockhaus, et al. Expires 24 July 2021 [Page 14]
Internet-Draft CMP Algorithms January 2021
id-hmacWithSHA224 OBJECT IDENTIFIER ::= { iso(1) member-body(2)
us(840) rsadsi(113549) digestAlgorithm(2) 8 }
id-hmacWithSHA256 OBJECT IDENTIFIER ::= { iso(1) member-body(2)
us(840) rsadsi(113549) digestAlgorithm(2) 9 }
id-hmacWithSHA384 OBJECT IDENTIFIER ::= { iso(1) member-body(2)
us(840) rsadsi(113549) digestAlgorithm(2) 10 }
id-hmacWithSHA512 OBJECT IDENTIFIER ::= { iso(1) member-body(2)
us(840) rsadsi(113549) digestAlgorithm(2) 11 }
Specific conventions to be considered for SHA2-based HMAC are
specified in RFC 4231 Section 3.1 [RFC4231].
6.2.2. AES-GMAC
The AES-GMAC algorithm is defined in FIPS Pub 197 [NIST.FIPS.197] and
FIPS SP 800-38d [NIST.SP.800-38d].
The AES-GMAC algorithm is identified by the following OIDs:
id-aes128-GMAC OBJECT IDENTIFIER ::= { joint-iso-itu-t(2)
country(16) us(840) organization(1) gov(101) csor(3)
nistAlgorithm(4) aes(1) 9 }
id-aes192-GMAC OBJECT IDENTIFIER ::= { joint-iso-itu-t(2)
country(16) us(840) organization(1) gov(101) csor(3)
nistAlgorithm(4) aes(1) 29 }
id-aes256-GMAC OBJECT IDENTIFIER ::= { joint-iso-itu-t(2)
country(16) us(840) organization(1) gov(101) csor(3)
nistAlgorithm(4) aes(1) 49 }
Specific conventions to be considered for AES-GMAC are specified in
[draft-housley-lamps-cms-aes-mac-
alg].draft-ietf-lamps-cms-aes-gmac-alg
[I-D.ietf.lamps-cms-aes-gmac-alg].
6.2.3. SHAKE-based KMAC
The KMAC algorithm is defined in RFC 2104 [RFC2104] and
FIPS SP 800-195 [NIST.SP.800-195].
The HMAC algorithm used with SHA2 message digest algorithms is
identified by the following OIDs:
id-KmacWithSHAKE128 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2)
country(16) us(840) organization(1) gov(101) csor(3)
nistAlgorithm(4) 2 19 }
id-KmacWithSHAKE256 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2)
country(16) us(840) organization(1) gov(101) csor(3)
nistAlgorithm(4) 2 20 }
Brockhaus, et al. Expires 24 July 2021 [Page 15]
Internet-Draft CMP Algorithms January 2021
Specific conventions to be considered for KMAC with SHAKE are
specified in RFC 8702 Section 3.4 [RFC8702].
7. IANA Considerations
This document does not request changes to the IANA registry.
8. Security Considerations
RFC 4210 Appendix D.2 [RFC4210] contains a set of algorithms,
mandatory to be supported by conforming implementations. Theses
algorithms were appropriate at the time CMP was released, but as
cryptographic algorithms weaken over time, some of them should not be
used anymore. In general, new attacks are emerging due to research
cryptoanalysis or increase in computing power. New algorithms were
introduced that are more resistant to today's attacks.
This document lists many cryptographic algorithms usable with CMP to
offer implementers a more up to date choice. Finally, the algorithms
to be supported also heavily depend on the utilized certificates in
the target environment.
In the appendix of this document there is also an update to the
Appendix D.2 of RFC 4210 [RFC4210] and a set of algorithms to be
supported when implementing the Lightweight CMP Profile
[I-D.ietf-lamps-lightweight-cmp-profile].
To keep the list of algorithms to be used with CMP up to date and to
enlist secure algorithms resisting known attack scenarios, future
algorithms should be added and weakened algorithms should be
deprecated.
9. Acknowledgements
Thanks to Russ Housley for supporting this draft with submitting
[I-D.ietf.lamps-cms-aes-gmac-alg] and
[I-D.ietf.lamps-crmf-update-algs].
May thanks also to all reviewers like John Gray, Mark Ferreira,
Yuefei Lu, Tomas Gustavsson, Lijun Liao, David von Oheimb and Steffen
Fries for their input and feedback to this document. Apologies to
all not mentioned reviewers and supporters.
10. Normative References
Brockhaus, et al. Expires 24 July 2021 [Page 16]
Internet-Draft CMP Algorithms January 2021
[I-D.ietf-lamps-cmp-updates]
Brockhaus, H., "CMP Updates", Work in Progress, Internet-
Draft, draft-ietf-lamps-cmp-updates-06, 2 November 2020,
<https://tools.ietf.org/html/draft-ietf-lamps-cmp-updates-
06>.
[I-D.ietf.lamps-cms-aes-gmac-alg]
Housley, R., "Using the AES-GMAC Algorithm with the
Cryptographic Message Syntax (CMS)", Work in Progress,
Internet-Draft, draft-ietf-lamps-cms-aes-gmac-alg-00, 2
December 2020, <https://datatracker.ietf.org/doc/draft-
ietf-lamps-cms-aes-gmac-alg-00>.
[I-D.ietf.lamps-crmf-update-algs]
Housley, R., "Algorithm Requirements Update to the
Internet X.509 Public Key Infrastructure Certificate
Request Message Format (CRMF)", Work in Progress,
Internet-Draft, draft-ietf-lamps-crmf-update-algs-00, 10
December 2020, <http://datatracker.ietf.org/doc/draft-
ietf-lamps-crmf-update-algs-00>.
[NIST.FIPS.180-4]
Dang, Quynh H., "Secure Hash Standard", NIST NIST FIPS
180-4, DOI 10.6028/NIST.FIPS.180-4, July 2015,
<https://nvlpubs.nist.gov/nistpubs/FIPS/
NIST.FIPS.180-4.pdf>.
[NIST.FIPS.186-4]
National Institute of Standards and Technology (NIST),
"Digital Signature Standard (DSS)", NIST NIST FIPS 186-4,
DOI 10.6028/NIST.FIPS.186-4, July 2013,
<https://nvlpubs.nist.gov/nistpubs/FIPS/
NIST.FIPS.186-4.pdf>.
[NIST.FIPS.186-5]
National Institute of Standards and Technology (NIST),
"FIPS Pub 186-5 (Draft): Digital Signature Standard
(DSS)", October 2019,
<https://nvlpubs.nist.gov/nistpubs/FIPS/
NIST.FIPS.186-5-draft.pdf>.
[NIST.FIPS.197]
National Institute of Standards and Technology (NIST),
"Advanced encryption standard (AES)", NIST NIST FIPS 197,
DOI 10.6028/NIST.FIPS.197, November 2001,
<https://nvlpubs.nist.gov/nistpubs/FIPS/
NIST.FIPS.197.pdf>.
Brockhaus, et al. Expires 24 July 2021 [Page 17]
Internet-Draft CMP Algorithms January 2021
[NIST.FIPS.198-1]
National Institute of Standards and Technology (NIST),
"The Keyed-Hash Message Authentication Code (HMAC)",
NIST NIST FIPS 198-1, DOI 10.6028/NIST.FIPS.198-1, July
2008, <https://nvlpubs.nist.gov/nistpubs/FIPS/
NIST.FIPS.198-1.pdf>.
[NIST.FIPS.202]
Dworkin, Morris J., "SHA-3 Standard: Permutation-Based
Hash and Extendable-Output Functions", NIST NIST FIPS 202,
DOI 10.6028/NIST.FIPS.202, July 2015,
<https://nvlpubs.nist.gov/nistpubs/FIPS/
NIST.FIPS.202.pdf>.
[NIST.SP.800-195]
O'Reilly, Patrick., Rigopoulos, Kristina., Feldman,
Larry., and Greg. Witte, "2016 NIST/ITL cybersecurity
program: annual report", NIST NIST SP 800-195,
DOI 10.6028/NIST.SP.800-195, September 2017,
<https://nvlpubs.nist.gov/nistpubs/SpecialPublications/
NIST.SP.800-195.pdf>.
[NIST.SP.800-38d]
Dworkin, M J., "Recommendation for block cipher modes of
operation :GaloisCounter Mode (GCM) and GMAC", NIST NIST
SP 800-38d, DOI 10.6028/NIST.SP.800-38d, 2007,
<https://nvlpubs.nist.gov/nistpubs/Legacy/SP/
nistspecialpublication800-38d.pdf>.
[RFC2104] Krawczyk, H., Bellare, M., and R. Canetti, "HMAC: Keyed-
Hashing for Message Authentication", RFC 2104,
DOI 10.17487/RFC2104, February 1997,
<https://www.rfc-editor.org/info/rfc2104>.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>.
[RFC2631] Rescorla, E., "Diffie-Hellman Key Agreement Method",
RFC 2631, DOI 10.17487/RFC2631, June 1999,
<https://www.rfc-editor.org/info/rfc2631>.
[RFC3370] Housley, R., "Cryptographic Message Syntax (CMS)
Algorithms", RFC 3370, DOI 10.17487/RFC3370, August 2002,
<https://www.rfc-editor.org/info/rfc3370>.
Brockhaus, et al. Expires 24 July 2021 [Page 18]
Internet-Draft CMP Algorithms January 2021
[RFC3394] Schaad, J. and R. Housley, "Advanced Encryption Standard
(AES) Key Wrap Algorithm", RFC 3394, DOI 10.17487/RFC3394,
September 2002, <https://www.rfc-editor.org/info/rfc3394>.
[RFC3560] Housley, R., "Use of the RSAES-OAEP Key Transport
Algorithm in Cryptographic Message Syntax (CMS)",
RFC 3560, DOI 10.17487/RFC3560, July 2003,
<https://www.rfc-editor.org/info/rfc3560>.
[RFC3565] Schaad, J., "Use of the Advanced Encryption Standard (AES)
Encryption Algorithm in Cryptographic Message Syntax
(CMS)", RFC 3565, DOI 10.17487/RFC3565, July 2003,
<https://www.rfc-editor.org/info/rfc3565>.
[RFC4056] Schaad, J., "Use of the RSASSA-PSS Signature Algorithm in
Cryptographic Message Syntax (CMS)", RFC 4056,
DOI 10.17487/RFC4056, June 2005,
<https://www.rfc-editor.org/info/rfc4056>.
[RFC4210] Adams, C., Farrell, S., Kause, T., and T. Mononen,
"Internet X.509 Public Key Infrastructure Certificate
Management Protocol (CMP)", RFC 4210,
DOI 10.17487/RFC4210, September 2005,
<https://www.rfc-editor.org/info/rfc4210>.
[RFC4211] Schaad, J., "Internet X.509 Public Key Infrastructure
Certificate Request Message Format (CRMF)", RFC 4211,
DOI 10.17487/RFC4211, September 2005,
<https://www.rfc-editor.org/info/rfc4211>.
[RFC4231] Nystrom, M., "Identifiers and Test Vectors for HMAC-SHA-
224, HMAC-SHA-256, HMAC-SHA-384, and HMAC-SHA-512",
RFC 4231, DOI 10.17487/RFC4231, December 2005,
<https://www.rfc-editor.org/info/rfc4231>.
[RFC5652] Housley, R., "Cryptographic Message Syntax (CMS)", STD 70,
RFC 5652, DOI 10.17487/RFC5652, September 2009,
<https://www.rfc-editor.org/info/rfc5652>.
[RFC5753] Turner, S. and D. Brown, "Use of Elliptic Curve
Cryptography (ECC) Algorithms in Cryptographic Message
Syntax (CMS)", RFC 5753, DOI 10.17487/RFC5753, January
2010, <https://www.rfc-editor.org/info/rfc5753>.
[RFC5754] Turner, S., "Using SHA2 Algorithms with Cryptographic
Message Syntax", RFC 5754, DOI 10.17487/RFC5754, January
2010, <https://www.rfc-editor.org/info/rfc5754>.
Brockhaus, et al. Expires 24 July 2021 [Page 19]
Internet-Draft CMP Algorithms January 2021
[RFC8017] Moriarty, K., Ed., Kaliski, B., Jonsson, J., and A. Rusch,
"PKCS #1: RSA Cryptography Specifications Version 2.2",
RFC 8017, DOI 10.17487/RFC8017, November 2016,
<https://www.rfc-editor.org/info/rfc8017>.
[RFC8018] Moriarty, K., Ed., Kaliski, B., and A. Rusch, "PKCS #5:
Password-Based Cryptography Specification Version 2.1",
RFC 8018, DOI 10.17487/RFC8018, January 2017,
<https://www.rfc-editor.org/info/rfc8018>.
[RFC8032] Josefsson, S. and I. Liusvaara, "Edwards-Curve Digital
Signature Algorithm (EdDSA)", RFC 8032,
DOI 10.17487/RFC8032, January 2017,
<https://www.rfc-editor.org/info/rfc8032>.
[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
May 2017, <https://www.rfc-editor.org/info/rfc8174>.
[RFC8418] Housley, R., "Use of the Elliptic Curve Diffie-Hellman Key
Agreement Algorithm with X25519 and X448 in the
Cryptographic Message Syntax (CMS)", RFC 8418,
DOI 10.17487/RFC8418, August 2018,
<https://www.rfc-editor.org/info/rfc8418>.
[RFC8419] Housley, R., "Use of Edwards-Curve Digital Signature
Algorithm (EdDSA) Signatures in the Cryptographic Message
Syntax (CMS)", RFC 8419, DOI 10.17487/RFC8419, August
2018, <https://www.rfc-editor.org/info/rfc8419>.
[RFC8702] Kampanakis, P. and Q. Dang, "Use of the SHAKE One-Way Hash
Functions in the Cryptographic Message Syntax (CMS)",
RFC 8702, DOI 10.17487/RFC8702, January 2020,
<https://www.rfc-editor.org/info/rfc8702>.
11. Informative References
[ECRYPT.CSA.D5.4]
University of Bristol, "Algorithms, Key Size and Protocols
Report (2018)", March 2015,
<https://www.ecrypt.eu.org/csa/documents/
D5.4-FinalAlgKeySizeProt.pdf>.
Brockhaus, et al. Expires 24 July 2021 [Page 20]
Internet-Draft CMP Algorithms January 2021
[I-D.ietf-lamps-lightweight-cmp-profile]
Brockhaus, H., Fries, S., and D. Oheimb, "Lightweight CMP
Profile", Work in Progress, Internet-Draft, draft-ietf-
lamps-lightweight-cmp-profile-04, 2 November 2020,
<https://tools.ietf.org/html/draft-ietf-lamps-lightweight-
cmp-profile-04>.
[NIST.SP.800-57pt1r5]
Barker, Elaine., "Recommendation for key management:part 1
- general", NIST NIST SP 800-57pt1r5,
DOI 10.6028/NIST.SP.800-57pt1r5, May 2020,
<https://nvlpubs.nist.gov/nistpubs/SpecialPublications/
NIST.SP.800-57pt1r5.pdf>.
[RFC8551] Schaad, J., Ramsdell, B., and S. Turner, "Secure/
Multipurpose Internet Mail Extensions (S/MIME) Version 4.0
Message Specification", RFC 8551, DOI 10.17487/RFC8551,
April 2019, <https://www.rfc-editor.org/info/rfc8551>.
Appendix A. Algorithm Use Profiles
This appendix provides profiles of algorithms and respective
conventions for different application use cases.
A.1. Algorithm selection guideline
To promote interoperability, based on the recommendations of NIST
SP 800-57 Recommendation for Key Management [NIST.SP.800-57pt1r5] and
ECRYPT Algorithms, Key Size and Protocols Report (2018)
[ECRYPT.CSA.D5.4], the following choices are RECOMMENDED:
< To be done. >
A.2. Algorithm Profile for PKI Management Message Profiles
The following table contains definitions of algorithms used within
PKI Management Message Profiles as defined in CMP Appendix D.2
[RFC4210].
The columns in the table are:
Name: an identifier used for message profiles
Use: description of where and for what the algorithm is used
Mandatory: algorithms which MUST be supported by conforming
implementations
Brockhaus, et al. Expires 24 July 2021 [Page 21]
Internet-Draft CMP Algorithms January 2021
+==============+=================================+==================+
| Name | Use | Mandatory |
+==============+=================================+==================+
| MSG_SIG_ALG | protection of PKI messages | RSA |
| | using signature | |
+--------------+---------------------------------+------------------+
| MSG_MAC_ALG | protection of PKI messages | PasswordBasedMac |
| | using MACing | |
+--------------+---------------------------------+------------------+
| SYM_PENC_ALG | symmetric encryption of an | AES-wrap |
| | end entity's private key | |
| | where symmetric key is | |
| | distributed out-of-band | |
+--------------+---------------------------------+------------------+
| PROT_ENC_ALG | asymmetric algorithm used for | D-H |
| | encryption of (symmetric keys | |
| | for encryption of) private | |
| | keys transported in | |
| | PKIMessages | |
+--------------+---------------------------------+------------------+
| PROT_SYM_ALG | symmetric encryption | AES |
| | algorithm used for encryption | |
| | of private key bits (a key of | |
| | this type is encrypted using | |
| | PROT_ENC_ALG) | |
+--------------+---------------------------------+------------------+
Table 1
Mandatory Algorithm Identifiers and Specifications:
RSA: sha256WithRSAEncryption with 2048 bit, see Section 3.1
PasswordBasedMac: id-PasswordBasedMac, see Section 6.1 (with id-
sha256 as the owf parameter, see Section 2.1 and id-hmacWithSHA256 as
the mac parameter, see Section 6.2.1)
D-H: id-alg-ESDH, see Section 4.1.1
AES-wrap: id-aes256-wrap, see Section 4.3.1
AES: id-aes256-CBC, see Section 5.1
< To be checked. >
Brockhaus, et al. Expires 24 July 2021 [Page 22]
Internet-Draft CMP Algorithms January 2021
A.3. Algorithm Profile for Lightweight CMP Profile
The following table contains definitions of algorithms which MUST be
supported by conforming implementations This profile is referenced in
the Lightweight CMP Profile [I-D.ietf-lamps-lightweight-cmp-profile].
The columns in the table are:
Name: an identifier used for message profiles
Use: description of where and for what the algorithm is used
Mandatory: algorithms which MUST be supported by conforming
implementations (only if a PKI management operation using the
respective algorithms is supported)
Brockhaus, et al. Expires 24 July 2021 [Page 23]
Internet-Draft CMP Algorithms January 2021
+==============+==============================+==================+
| Name | Use | Mandatory |
+==============+==============================+==================+
| MSG_SIG_ALG | protection of PKI messages | RSA, ECDSA |
| | using signature | |
+--------------+------------------------------+------------------+
| MSG_MAC_ALG | protection of PKI messages | PasswordBasedMac |
| | using MACing | |
+--------------+------------------------------+------------------+
| KM_KA_ALG | asymmetric key agreement | D-H, ECDH |
| | algorithm used for agreement | |
| | of a symmetric keys for | |
| | encryption of EnvelopedData, | |
| | e.g., a private key | |
| | transported in PKIMessages | |
+--------------+------------------------------+------------------+
| KM_KT_ALG | asymmetric key encryption | RSA |
| | algorithm used for transport | |
| | of a symmetric keys for | |
| | encryption of EnvelopedData, | |
| | e.g., a private key | |
| | transported in PKIMessages | |
+--------------+------------------------------+------------------+
| KM_PB_ALG | symmetric derivation | PBKDF2 |
| | algorithm used to derive a | |
| | symmetric key for encryption | |
| | of EnvelopedData, e.g., a | |
| | private key transported in | |
| | PKIMessages, from a password | |
+--------------+------------------------------+------------------+
| KM_KW_ALG | symmetric key encryption | AES-wrap |
| | algorithm to encrypt a | |
| | content encryption key | |
+--------------+------------------------------+------------------+
| PROT_SYM_ALG | symmetric content encryption | AES |
| | algorithm used for | |
| | encryption of, e.g., private | |
| | key bits (a key of this type | |
| | is encrypted using | |
| | PROT_ENC_ALG) | |
+--------------+------------------------------+------------------+
Table 2
Mandatory Algorithm Identifiers and Specifications:
RSA: sha256WithRSAEncryption with 2048 bit, see Section 3.1
Brockhaus, et al. Expires 24 July 2021 [Page 24]
Internet-Draft CMP Algorithms January 2021
ECDSA: ecdsa-with-SHA256 with curve SECP-256, see Section 3.2
PasswordBasedMac: id-PasswordBasedMac, see Section 6.1 (with id-
sha256 as the owf parameter, see Section 2.1 and id-hmacWithSHA256 as
the mac parameter, see Section 6.2.1)
D-H: id-alg-ESDH, see Section 4.1.1
ECDH: dhSinglePass-stdDH-sha256kdf-scheme, see Section 4.1.2
RSA: rsaEncryption with 2048 bit, see Section 4.2.1
PBKDF2: id-PBKDF2, see Section 4.4.1
AES-wrap: id-aes256-wrap, see Section 4.3.1
AES: id-aes256-CBC, see Section 5.1
< To be checked. >
Appendix B. History of changes
Note: This appendix will be deleted in the final version of the
document.
From version 01 -> 02:
* Added Hans Aschauer, Mike Ounsworth, and Serge Mister as co-author
* Changed to XML V3
* Added SHAKE digest algorithm to Section 2 as discussed at IETF 109
* Deleted DSA from Section 3 as discussed at IETF 109
* Added RSASSA-PSS with SHAKE to Section 3
* Added SECP curves the section on ECDSA with SHA2, ECDSA with
SHAKE, and EdDSA to Section 3 as discussed at IETF 109
* Deleted static-static D-H and ECDH from Section 4.1 based on the
discussion on the mailing list (see thread "[CMP Algorithms]
Section 4.1.1 and 4.1.2 drop static-static (EC)DH key agreement
algorithms for use in CMP")
* Added ECDH OIDs and SECP curves, as well as ECDH with curve25519
and curve448 to Section 4.1 as discussed at IETF 109
Brockhaus, et al. Expires 24 July 2021 [Page 25]
Internet-Draft CMP Algorithms January 2021
* Deleted RSA-OAEP from Section 4.2 first as discussed at IETF 109,
but re-added it after discussion on the mailing list (see thread
"Mail regarding draft-ietf-lamps-cmp-algorithms")
* Added a paragraph to Section 4.3.1 to explain that the algorithms
and key length for content encryption and key wrapping must be
aligned as discussed on the mailing list (see thread "[CMP
Algorithms] Use Key-Wrap with or without padding in Section 4.3
and Section 5")
* Deleted AES-CCM and AES-GMC from and added AES-CBC to Section 5 as
discussed at IETF 109
* Added Section 6.1.2 to offer PBMAC1 as discusses on the mailing
list (see thread "Mail regarding draft-ietf-lamps-crmf-update-
algs-02") and restructured text in Section 6 to be easier to
differentiate between password- and shared-key-based MAC
* Deleted Diffie-Hellmann based MAC from Section 6 as is only
relevant when using enrolling Diffie-Hellmann certificates
* Added AES-GMAC and SHAKE-based KMAC to Section 6 as discussed at
IETF 109
* Extended Section 9 to mention Russ supporting with two additional
I-Ds and name further supporters of the draft
* Added a first draft of a generic algorithm selection guideline to
Appendix A
* Added a first proposal for mandatory algorithms for the
Lightweight CMP Profile to Appendix A
* Minor changes in wording
From version 00 -> 01:
* Changed sections Symmetric Key-Encryption Algorithms and Content
Encryption Algorithms based on the discussion on the mailing list
(see thread "[CMP Algorithms] Use Key-Wrap with or without padding
in Section 4.3 and Section 5")
* Added Appendix A with updated algorithms profile for RDC4210
Appendix D.2 and first proposal for the Lightweight CMP Profile
* Minor changes in wording
Brockhaus, et al. Expires 24 July 2021 [Page 26]
Internet-Draft CMP Algorithms January 2021
Authors' Addresses
Hendrik Brockhaus (editor)
Siemens AG
Email: hendrik.brockhaus@siemens.com
Hans Aschauer
Siemens AG
Email: hans.aschauer@siemens.com
Mike Ounsworth
Entrust
Email: mike.ounsworth@entrust.com
Serge Mister
Entrust
Email: serge.mister@entrust.com
Brockhaus, et al. Expires 24 July 2021 [Page 27]