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Mark Andrews
2008-12-04 04:54:31 +00:00
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doc/draft/draft-ietf-dnsext-dnssec-rsasha256-06.txt → doc/draft/draft-ietf-dnsext-dnssec-rsasha256-07.txt
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@@ -3,13 +3,13 @@
DNS Extensions working group J. Jansen DNS Extensions working group J. Jansen
Internet-Draft NLnet Labs Internet-Draft NLnet Labs
Intended status: Standards Track October 23, 2008 Intended status: Standards Track December 03, 2008
Expires: April 26, 2009 Expires: June 6, 2009
Use of SHA-2 algorithms with RSA in DNSKEY and RRSIG Resource Records Use of SHA-2 algorithms with RSA in DNSKEY and RRSIG Resource Records
for DNSSEC for DNSSEC
draft-ietf-dnsext-dnssec-rsasha256-06 draft-ietf-dnsext-dnssec-rsasha256-07
Status of this Memo Status of this Memo
@@ -34,7 +34,7 @@ Status of this Memo
The list of Internet-Draft Shadow Directories can be accessed at The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html. http://www.ietf.org/shadow.html.
This Internet-Draft will expire on April 26, 2009. This Internet-Draft will expire on June 6, 2009.
Abstract Abstract
@@ -52,9 +52,9 @@ Abstract
Jansen Expires April 26, 2009 [Page 1] Jansen Expires June 6, 2009 [Page 1]
Internet-Draft DNSSEC RSA/SHA-2 October 2008 Internet-Draft DNSSEC RSA/SHA-2 December 2008
Table of Contents Table of Contents
@@ -62,7 +62,7 @@ Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. DNSKEY Resource Records . . . . . . . . . . . . . . . . . . . . 3 2. DNSKEY Resource Records . . . . . . . . . . . . . . . . . . . . 3
2.1. RSA/SHA-256 DNSKEY Resource Records . . . . . . . . . . . . 3 2.1. RSA/SHA-256 DNSKEY Resource Records . . . . . . . . . . . . 3
2.2. RSA/SHA-512 DNSKEY Resource Records . . . . . . . . . . . . 3 2.2. RSA/SHA-512 DNSKEY Resource Records . . . . . . . . . . . . 4
3. RRSIG Resource Records . . . . . . . . . . . . . . . . . . . . 4 3. RRSIG Resource Records . . . . . . . . . . . . . . . . . . . . 4
3.1. RSA/SHA-256 RRSIG Resource Records . . . . . . . . . . . . 4 3.1. RSA/SHA-256 RRSIG Resource Records . . . . . . . . . . . . 4
3.2. RSA/SHA-512 RRSIG Resource Records . . . . . . . . . . . . 5 3.2. RSA/SHA-512 RRSIG Resource Records . . . . . . . . . . . . 5
@@ -71,12 +71,12 @@ Table of Contents
4.2. Signature Sizes . . . . . . . . . . . . . . . . . . . . . . 5 4.2. Signature Sizes . . . . . . . . . . . . . . . . . . . . . . 5
5. Implementation Considerations . . . . . . . . . . . . . . . . . 5 5. Implementation Considerations . . . . . . . . . . . . . . . . . 5
5.1. Support for SHA-2 signatures . . . . . . . . . . . . . . . 5 5.1. Support for SHA-2 signatures . . . . . . . . . . . . . . . 5
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 6
7. Security Considerations . . . . . . . . . . . . . . . . . . . . 6 7. Security Considerations . . . . . . . . . . . . . . . . . . . . 6
7.1. SHA-1 versus SHA-2 Considerations for RRSIG Resource 7.1. SHA-1 versus SHA-2 Considerations for RRSIG Resource
Records . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Records . . . . . . . . . . . . . . . . . . . . . . . . . . 6
7.2. Signature Type Downgrade Attacks . . . . . . . . . . . . . 6 7.2. Signature Type Downgrade Attacks . . . . . . . . . . . . . 6
8. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 6 8. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 7
9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 7 9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 7
9.1. Normative References . . . . . . . . . . . . . . . . . . . 7 9.1. Normative References . . . . . . . . . . . . . . . . . . . 7
9.2. Informative References . . . . . . . . . . . . . . . . . . 7 9.2. Informative References . . . . . . . . . . . . . . . . . . 7
@@ -108,9 +108,9 @@ Table of Contents
Jansen Expires April 26, 2009 [Page 2] Jansen Expires June 6, 2009 [Page 2]
Internet-Draft DNSSEC RSA/SHA-2 October 2008 Internet-Draft DNSSEC RSA/SHA-2 December 2008
1. Introduction 1. Introduction
@@ -137,10 +137,14 @@ Internet-Draft DNSSEC RSA/SHA-2 October 2008
used. The same goes for RSA/SHA-256 and RSA/SHA-512, which will be used. The same goes for RSA/SHA-256 and RSA/SHA-512, which will be
grouped using the name RSA/SHA-2. grouped using the name RSA/SHA-2.
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 [RFC2119].
2. DNSKEY Resource Records 2. DNSKEY Resource Records
The format of the DNSKEY RR can be found in RFC 4034 [RFC4034], RFC The format of the DNSKEY RR can be found in RFC 4034 [RFC4034]. RFC
3110 [RFC3110] describes the use of RSA/SHA-1 for DNSSEC signatures. 3110 [RFC3110] describes the use of RSA/SHA-1 for DNSSEC signatures.
2.1. RSA/SHA-256 DNSKEY Resource Records 2.1. RSA/SHA-256 DNSKEY Resource Records
@@ -157,18 +161,19 @@ Internet-Draft DNSSEC RSA/SHA-2 October 2008
SHA-256 keys MUST NOT be less than 512 bits, and MUST NOT be more SHA-256 keys MUST NOT be less than 512 bits, and MUST NOT be more
than 4096 bits. than 4096 bits.
Jansen Expires June 6, 2009 [Page 3]
Internet-Draft DNSSEC RSA/SHA-2 December 2008
2.2. RSA/SHA-512 DNSKEY Resource Records 2.2. RSA/SHA-512 DNSKEY Resource Records
RSA public keys for use with RSA/SHA-512 are stored in DNSKEY RSA public keys for use with RSA/SHA-512 are stored in DNSKEY
resource records (RRs) with the algorithm number {TBA3}. resource records (RRs) with the algorithm number {TBA3}.
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For use with NSEC3, the algorithm number for RSA/SHA-512 will be For use with NSEC3, the algorithm number for RSA/SHA-512 will be
{TBA4}. The use of a different algorithm number to differentiate {TBA4}. The use of a different algorithm number to differentiate
between the use of NSEC and NSEC3 is in keeping with the approach between the use of NSEC and NSEC3 is in keeping with the approach
@@ -212,19 +217,19 @@ Internet-Draft DNSSEC RSA/SHA-2 October 2008
RSA/SHA-256 signatures are stored in the DNS using RRSIG resource RSA/SHA-256 signatures are stored in the DNS using RRSIG resource
records (RRs) with algorithm number {TBA1} for use with NSEC, or records (RRs) with algorithm number {TBA1} for use with NSEC, or
Jansen Expires June 6, 2009 [Page 4]
Internet-Draft DNSSEC RSA/SHA-2 December 2008
{TBA2} for use with NSEC3. {TBA2} for use with NSEC3.
The prefix is the ASN.1 BER SHA-256 algorithm designator prefix as The prefix is the ASN.1 DER SHA-256 algorithm designator prefix as
specified in PKCS #1 v2.1 [RFC3447]: specified in PKCS #1 v2.1 [RFC3447]:
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hex 30 31 30 0d 06 09 60 86 48 01 65 03 04 02 01 05 00 04 20 hex 30 31 30 0d 06 09 60 86 48 01 65 03 04 02 01 05 00 04 20
3.2. RSA/SHA-512 RRSIG Resource Records 3.2. RSA/SHA-512 RRSIG Resource Records
@@ -233,7 +238,7 @@ Internet-Draft DNSSEC RSA/SHA-2 October 2008
records (RRs) with algorithm number {TBA3} for use with NSEC, or records (RRs) with algorithm number {TBA3} for use with NSEC, or
{TBA4} for use with NSEC3. {TBA4} for use with NSEC3.
The prefix is the ASN.1 BER SHA-512 algorithm designator prefix as The prefix is the ASN.1 DER SHA-512 algorithm designator prefix as
specified in PKCS #1 v2.1 [RFC3447]: specified in PKCS #1 v2.1 [RFC3447]:
hex 30 51 30 0d 06 09 60 86 48 01 65 03 04 02 03 05 00 04 40 hex 30 51 30 0d 06 09 60 86 48 01 65 03 04 02 03 05 00 04 40
@@ -266,25 +271,30 @@ Internet-Draft DNSSEC RSA/SHA-2 October 2008
records with the RSA/SHA-2 algorithms. records with the RSA/SHA-2 algorithms.
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Internet-Draft DNSSEC RSA/SHA-2 December 2008
6. IANA Considerations 6. IANA Considerations
Note to the RFC editor: please remove this paragraph during final
editing, and request IANA to update the {TBA} designators.
IANA has assigned DNS Security Algorithm Numbers {TBA1} for RSA/ IANA has assigned DNS Security Algorithm Numbers {TBA1} for RSA/
SHA-256 with NSEC, {TBA2} for RSA/SHA-256 with NSEC3, {TBA3} for RSA/ SHA-256 with NSEC, {TBA2} for RSA/SHA-256 with NSEC3, {TBA3} for RSA/
SHA-512 with NSEC, and {TBA4} for RSA/SHA-512 with NSEC3. SHA-512 with NSEC, and {TBA4} for RSA/SHA-512 with NSEC3.
The algorithm list from RFC 4034 Appendix A.1 [RFC4034] is extended The algorithm list from RFC 4034 Appendix A.1 [RFC4034] is extended
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Internet-Draft DNSSEC RSA/SHA-2 October 2008
with the following entries: with the following entries:
Zone Zone
Value Algorithm [Mnemonic] Signing References Value Algorithm Mnemonic Signing References
{TBA1} RSA/SHA-256 RSASHA256 y {this memo} {TBA1} RSA/SHA-256 RSASHA256 y {this memo}
{TBA2} RSA/SHA-256-NSEC3 RSASHA256NSEC3 y {this memo} {TBA2} RSA/SHA-256-NSEC3 RSASHA256NSEC3 y {this memo}
{TBA3} RSA/SHA-512 RSASHA512 y {this memo} {TBA3} RSA/SHA-512 RSASHA512 y {this memo}
@@ -319,6 +329,14 @@ Internet-Draft DNSSEC RSA/SHA-2 October 2008
malicious party cannot filter out the RSA/SHA-2 RRSIG, and force the malicious party cannot filter out the RSA/SHA-2 RRSIG, and force the
validator to use the RSA/SHA-1 signature if both are present in the validator to use the RSA/SHA-1 signature if both are present in the
zone. This should provide resilience against algorithm downgrade zone. This should provide resilience against algorithm downgrade
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Internet-Draft DNSSEC RSA/SHA-2 December 2008
attacks, if the validator supports RSA/SHA-2. attacks, if the validator supports RSA/SHA-2.
@@ -329,14 +347,6 @@ Internet-Draft DNSSEC RSA/SHA-2 October 2008
for consistency. The authors of and contributors to these documents for consistency. The authors of and contributors to these documents
are gratefully acknowledged for their hard work. are gratefully acknowledged for their hard work.
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Internet-Draft DNSSEC RSA/SHA-2 October 2008
The following people provided additional feedback and text: Jaap The following people provided additional feedback and text: Jaap
Akkerhuis, Roy Arends, Rob Austein, Francis Dupont, Miek Gieben, Akkerhuis, Roy Arends, Rob Austein, Francis Dupont, Miek Gieben,
Alfred Hoenes, Paul Hoffman, Peter Koch, Michael St. Johns, Scott Alfred Hoenes, Paul Hoffman, Peter Koch, Michael St. Johns, Scott
@@ -351,6 +361,9 @@ Internet-Draft DNSSEC RSA/SHA-2 October 2008
National Institute of Standards and Technology, "Secure National Institute of Standards and Technology, "Secure
Hash Standard", FIPS PUB 180-2, August 2002. Hash Standard", FIPS PUB 180-2, August 2002.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", RFC 2119, March 1997.
[RFC3110] Eastlake, D., "RSA/SHA-1 SIGs and RSA KEYs in the Domain [RFC3110] Eastlake, D., "RSA/SHA-1 SIGs and RSA KEYs in the Domain
Name System (DNS)", RFC 3110, May 2001. Name System (DNS)", RFC 3110, May 2001.
@@ -373,6 +386,13 @@ Internet-Draft DNSSEC RSA/SHA-2 October 2008
"Recommendations for Key Management", NIST SP 800-57, "Recommendations for Key Management", NIST SP 800-57,
March 2007. March 2007.
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Internet-Draft DNSSEC RSA/SHA-2 December 2008
[RFC3447] Jonsson, J. and B. Kaliski, "Public-Key Cryptography [RFC3447] Jonsson, J. and B. Kaliski, "Public-Key Cryptography
Standards (PKCS) #1: RSA Cryptography Specifications Standards (PKCS) #1: RSA Cryptography Specifications
Version 2.1", RFC 3447, February 2003. Version 2.1", RFC 3447, February 2003.
@@ -385,14 +405,6 @@ Internet-Draft DNSSEC RSA/SHA-2 October 2008
Existence", RFC 5155, March 2008. Existence", RFC 5155, March 2008.
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Author's Address Author's Address
Jelte Jansen Jelte Jansen
@@ -432,21 +444,9 @@ Author's Address
Jansen Expires June 6, 2009 [Page 8]
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Internet-Draft DNSSEC RSA/SHA-2 October 2008 Internet-Draft DNSSEC RSA/SHA-2 December 2008
Full Copyright Statement Full Copyright Statement
@@ -500,5 +500,5 @@ Intellectual Property
Jansen Expires April 26, 2009 [Page 9] Jansen Expires June 6, 2009 [Page 9]