Internet DRAFT - draft-belyavskiy-rfc5933-bis
draft-belyavskiy-rfc5933-bis
Network Working Group D. Belyavskiy
Internet-Draft TCINET
Intended status: Standards Track V. Dolmatov, Ed.
Expires: September 11, 2020 JSC "NPK Kryptonite"
March 10, 2020
Use of GOST 2012 Signature Algorithms in DNSKEY and RRSIG Resource
Records for DNSSEC
draft-belyavskiy-rfc5933-bis-02
Abstract
This document describes how to produce digital signatures and hash
functions using the GOST R 34.10-2012 and GOST R 34.11-2012
algorithms for DNSKEY, RRSIG, and DS resource records, for use in the
Domain Name System Security Extensions (DNSSEC).
Status of This Memo
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
2. DNSKEY Resource Records . . . . . . . . . . . . . . . . . . . 3
2.1. Using a Public Key with Existing Cryptographic Libraries 3
2.2. GOST DNSKEY RR Example . . . . . . . . . . . . . . . . . 4
3. RRSIG Resource Records . . . . . . . . . . . . . . . . . . . 4
3.1. RRSIG RR Example . . . . . . . . . . . . . . . . . . . . 4
4. DS Resource Records . . . . . . . . . . . . . . . . . . . . . 5
4.1. DS RR Example . . . . . . . . . . . . . . . . . . . . . . 5
5. Deployment Considerations . . . . . . . . . . . . . . . . . . 5
5.1. Key Sizes . . . . . . . . . . . . . . . . . . . . . . . . 5
5.2. Signature Sizes . . . . . . . . . . . . . . . . . . . . . 5
5.3. Digest Sizes . . . . . . . . . . . . . . . . . . . . . . 5
6. Implementation Considerations . . . . . . . . . . . . . . . . 6
6.1. Support for GOST Signatures . . . . . . . . . . . . . . . 6
7. Security Considerations . . . . . . . . . . . . . . . . . . . 6
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6
9. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 6
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 7
10.1. Normative References . . . . . . . . . . . . . . . . . . 7
10.2. Informative References . . . . . . . . . . . . . . . . . 8
10.3. URIs . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 8
1. Introduction
The Domain Name System (DNS) is the global hierarchical distributed
database for Internet Naming. The DNS has been extended to use
cryptographic keys and digital signatures for the verification of the
authenticity and integrity of its data. RFC 4033 [RFC4033], RFC 4034
[RFC4034], and RFC 4035 [RFC4035] describe these DNS Security
Extensions, called DNSSEC.
RFC 4034 describes how to store DNSKEY and RRSIG resource records,
and specifies a list of cryptographic algorithms to use. This
document extends that list with the signature and hash algorithms
GOST R 34.10-2012 ([GOST3410], [RFC7091]) and GOST R 34.11-2012
([GOST3411], [RFC6986]), and specifies how to store DNSKEY data and
how to produce RRSIG resource records with these algorithms.
Familiarity with DNSSEC and with GOST signature and hash algorithms
is assumed in this document.
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1.1. Terminology
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.
2. DNSKEY Resource Records
The format of the DNSKEY RR can be found in RFC 4034 [RFC4034].
GOST R 34.10-2012 public keys are stored with the algorithm number
TBA1.
According to [GOST3410] and [RFC7091], a public key is a point on the
elliptic curve Q = (x,y). The wire representation of a public key
MUST contain 64 octets, where the first 32 octets contain the little-
endian representation of x and the second 32 octets contain the
little-endian representation of y.
As GOST3410 and GOST3411 allows 2 variants of length of the output
hash and signature and many variants of parameters of the digital
signature, for the purpose of this document we use 256-bit variant of
the digital signature algorithm, corresponding 256-bit variant of the
digest algorithm. We select the parameters for the digital signature
algorithm to be id-tc26-gost-3410-2012-256-paramSetA in RFC 7836
[RFC7836].
2.1. Using a Public Key with Existing Cryptographic Libraries
At the time of this writing, existing GOST-aware cryptographic
libraries are capable of reading GOST public keys via a generic X509
API if the key is encoded according to RFC 7091 [RFC7091],
Section 2.3.2.
To make this encoding from the wire format of a GOST public key with
the parameters used in this document, prepend the 64 octets of key
data with the following 32-byte sequence:
0x30 0x5e 0x30 0x17 0x06 0x08 0x2a 0x85 0x03 0x07 0x01 0x01 0x01
0x01 0x30 0x0b 0x06 0x09 0x2a 0x85 0x03 0x07 0x01 0x02 0x01 0x01
0x01 0x03 0x43 0x00 0x04 0x40
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2.2. GOST DNSKEY RR Example
Given a private key with the following value (the value of the
Gost12Asn1 field is split here into two lines to simplify reading; in
the private key file, it must be in one line):
Private-key-format: v1.2
Algorithm: 23 (ECC-GOST12)
Gost12Asn1: MD4CAQAwFwYIKoUDBwEBAQEwCwYJKoUDBwECAQEBBCA0zvTDpCSjdRCERkd6
WDA2TF/ABQLp9MPZRl7hMXCVGg==
The following DNSKEY RR stores a DNS zone key for example:
example. 600 IN DNSKEY 256 3 23 XkZ6T+qQ9teOMsA/YK+kTzE
LhuMPTsYggdy2b+sfzJ6tH9eniziMX3gjMnUZIyrnSIchLjup8xpy+
UU5l1Eyjw== ;{id = 13439 (zsk), size = 512b}
3. RRSIG Resource Records
The value of the signature field in the RRSIG RR follows RFC 7091
[RFC7091] and is calculated as follows. The values for the RDATA
fields that precede the signature data are specified in RFC 4034
[RFC4034].
hash = GOSTR3411-2012(data)
where "data" is the wire format data of the resource record set that
is signed, as specified in RFC 4034 [RFC4034].
The signature is calculated from the hash according to the GOST R
34.10-2012 standard, and its wire format is compatible with RFC 7091
[RFC7091].
3.1. RRSIG RR Example
With the private key from this document, consisting of one MX record:
example. 600 IN MX 10 mail.example.
Setting the inception date to 2020-01-04 17:25:26 UTC and the
expiration date to 2020-02-01 17:25:26 UTC, the following signature
RR will be valid:
example. 600 IN RRSIG MX 23 1 600 20200201172526 (
20200104172526 13439 example. Etrs
AEGsNRf12HKjwNTg8U2HZ5JOSo34UaTcsho
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E1kwd5Ror4I7zltmWAgd4b9OBn80tsajtL0
Vuf45u8kEAgA==
)
Note: The ECC-GOST12 signature algorithm uses random data, so the
actual computed signature value will differ between signature
calculations.
4. DS Resource Records
The GOST R 34.11-2012 digest algorithm is denoted in DS RRs by the
digest type TBA2. The wire format of a digest value is compatible
with RFC 6986 [RFC6986].
4.1. DS RR Example
For Key Signing Key (KSK):
example. IN DNSKEY 257 3 23 hP3ISWPT8ehEEut8ozbqPcmbTAQK0jce7MHmK
0geOiRokFALGwsMrBf0H0AK2qrVJCWCJL+50v9UNZAS5mE70g== ;{id = 7574
(ksk), size = 512b}
The DS RR will be
example. IN DS 7574 23 5
990f40dc548a4dbcb4b80a0760f194ac0cc18484578834c1ac1f749f70c84103
5. Deployment Considerations
5.1. Key Sizes
The key size of GOST public keys conforming to this specification
MUST be 512 bits.
5.2. Signature Sizes
The size of a GOST signature conforming to this specification MUST be
512 bits.
5.3. Digest Sizes
The size of a GOST digest conforming to this specification MUST be
256 bits.
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6. Implementation Considerations
6.1. Support for GOST Signatures
DNSSEC-aware implementations MAY be able to support RRSIG and DNSKEY
resource records created with the GOST algorithms as defined in this
document.
7. Security Considerations
Currently, the cryptographic resistance of the GOST R 34.10-2012
digital signature algorithm is estimated as 2**128 operations of
multiple elliptic curve point computations on prime modulus of order
2**256.
Currently, the cryptographic collision resistance of the GOST R
34.11-2012 hash algorithm is estimated as 2**128 operations of
computations of a step hash function.
8. IANA Considerations
This document updates the IANA registry "DNS Security Algorithm
Numbers" [1] The following entries have been added to the registry:
Zone Trans.
Value Algorithm Mnemonic Signing Sec. References Status
TBA1 GOST R 34.10-2012 ECC-GOST12 Y * RFC TBA OPTIONAL
This document updates the RFC IANA registry "Delegation Signer (DS)
Resource Record (RR) Type Digest Algorithms" [2] by adding an entry
for the GOST R 34.11-2012 algorithm:
Value Algorithm Status
TBA2 GOST R 34.11-2012 OPTIONAL
This paragraph shoud be removed before the publication of RFC: For
the purpose of example computations, the following values were used:
TBA1 = 23, TBA2 = 5.
9. Acknowledgments
This document is a minor extension to RFC 4034 [RFC4034]. Also, we
tried to follow the documents RFC 3110 [RFC3110], RFC 4509 [RFC4509],
and RFC 5933 [RFC5933] for consistency. The authors of and
contributors to these documents are gratefully acknowledged for their
hard work.
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The following people provided additional feedback, text, and valuable
assistance: Alexander Venedyukhin, Valery Smyslov, TODO
10. References
10.1. Normative References
[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>.
[RFC3110] Eastlake 3rd, D., "RSA/SHA-1 SIGs and RSA KEYs in the
Domain Name System (DNS)", RFC 3110, DOI 10.17487/RFC3110,
May 2001, <https://www.rfc-editor.org/info/rfc3110>.
[RFC4033] Arends, R., Austein, R., Larson, M., Massey, D., and S.
Rose, "DNS Security Introduction and Requirements",
RFC 4033, DOI 10.17487/RFC4033, March 2005,
<https://www.rfc-editor.org/info/rfc4033>.
[RFC4034] Arends, R., Austein, R., Larson, M., Massey, D., and S.
Rose, "Resource Records for the DNS Security Extensions",
RFC 4034, DOI 10.17487/RFC4034, March 2005,
<https://www.rfc-editor.org/info/rfc4034>.
[RFC4035] Arends, R., Austein, R., Larson, M., Massey, D., and S.
Rose, "Protocol Modifications for the DNS Security
Extensions", RFC 4035, DOI 10.17487/RFC4035, March 2005,
<https://www.rfc-editor.org/info/rfc4035>.
[RFC6986] Dolmatov, V., Ed. and A. Degtyarev, "GOST R 34.11-2012:
Hash Function", RFC 6986, DOI 10.17487/RFC6986, August
2013, <https://www.rfc-editor.org/info/rfc6986>.
[RFC7091] Dolmatov, V., Ed. and A. Degtyarev, "GOST R 34.10-2012:
Digital Signature Algorithm", RFC 7091,
DOI 10.17487/RFC7091, December 2013,
<https://www.rfc-editor.org/info/rfc7091>.
[RFC7836] Smyshlyaev, S., Ed., Alekseev, E., Oshkin, I., Popov, V.,
Leontiev, S., Podobaev, V., and D. Belyavsky, "Guidelines
on the Cryptographic Algorithms to Accompany the Usage of
Standards GOST R 34.10-2012 and GOST R 34.11-2012",
RFC 7836, DOI 10.17487/RFC7836, March 2016,
<https://www.rfc-editor.org/info/rfc7836>.
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[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>.
10.2. Informative References
[RFC4509] Hardaker, W., "Use of SHA-256 in DNSSEC Delegation Signer
(DS) Resource Records (RRs)", RFC 4509,
DOI 10.17487/RFC4509, May 2006,
<https://www.rfc-editor.org/info/rfc4509>.
[RFC5933] Dolmatov, V., Ed., Chuprina, A., and I. Ustinov, "Use of
GOST Signature Algorithms in DNSKEY and RRSIG Resource
Records for DNSSEC", RFC 5933, DOI 10.17487/RFC5933, July
2010, <https://www.rfc-editor.org/info/rfc5933>.
10.3. URIs
[1] https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-
numbers.xhtml#dns-sec-alg-numbers-1
[2] https://www.iana.org/assignments/ds-rr-types/ds-rr-
types.xhtml#ds-rr-types-1
Authors' Addresses
Dmitry Belyavskiy
TCINET
8 marta st
Moscow
Russian Federation
Phone: +7 916 262 5593
Email: beldmit@gmail.com
Vasily Dolmatov (editor)
JSC "NPK Kryptonite"
Spartakovskaya sq., 14, bld 2, JSC "NPK Kryptonite"
Moscow 105082
Russian Federation
Email: vdolmatov@gmail.com
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