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- Fix #644: harden-algo-downgrade option, if turned off, fixes the

Browse source 
reported excessive validation failure when multiple algorithms
  are present.  It allows the weakest algorithm to validate the zone.


git-svn-id: file:///svn/unbound/trunk@3354 be551aaa-1e26-0410-a405-d3ace91eadb9
This commit is contained in:
Wouter Wijngaards 2015-03-09 13:30:37 +00:00
parent b87e7c90be
commit 49250ef291
13 changed files with 2148 additions and 1713 deletions
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5
doc/Changelog
View file

@ -1,3 +1,8 @@
9 March 2015: Wouter
- Fix #644: harden-algo-downgrade option, if turned off, fixes the
reported excessive validation failure when multiple algorithms
are present. It allows the weakest algorithm to validate the zone.
5 March 2015: Wouter
- contrib/unbound_smf22.tar.gz: Solaris SMF installation/removal
scripts. Contributed by Yuri Voinov.

5
doc/example.conf.in
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@ -284,6 +284,11 @@ server:
# implementation of draft-wijngaards-dnsext-resolver-side-mitigation.
# harden-referral-path: no
# Harden against algorithm downgrade when multiple algorithms are
# advertised in the DS record. If no, allows the weakest algorithm
# to validate the zone.
# harden-algo-downgrade: yes
# Use 0x20-encoded random bits in the query to foil spoof attempts.
# This feature is an experimental implementation of draft dns-0x20.
# use-caps-for-id: no

7
doc/unbound.conf.5.in
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@ -550,6 +550,13 @@ extra query load that is generated. Experimental option.
If you enable it consider adding more numbers after the target\-fetch\-policy
to increase the max depth that is checked to.
.TP
.B harden\-algo\-downgrade: \fI<yes or no>
Harden against algorithm downgrade when multiple algorithms are
advertised in the DS record. If no, allows the weakest algorithm to
validate the zone. Default is yes. Zone signers must produce zones
that allow this feature to work, but sometimes they do not, and turning
this option off avoids that validation failure.
.TP
.B use\-caps\-for\-id: \fI<yes or no>
Use 0x20\-encoded random bits in the query to foil spoof attempts.
This perturbs the lowercase and uppercase of query names sent to

182
testdata/val_ta_algo_dnskey_dp.rpl vendored Normal file
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@ -0,0 +1,182 @@
; config options
; The island of trust is at example.com
server:
trust-anchor: "example.com. 3600 IN DNSKEY 256 3 3 ALXLUsWqUrY3JYER3T4TBJIIs70j+sDS/UT2QRp61SE7S3EEXopNXoFE73JLRmvpi/UrOO/Vz4Se6wXv/CYCKjGw06U4WRgRYXcpEhJROyNapmdIKSxhOzfLVE1gqA0PweZR8dtY3aNQSRn3sPpwJr6Mi/PqQKAMMrZ9ckJpf1+bQMOOvxgzz2U1GS18b3yZKcgTMEaJzd/GZYzi/BN2DzQ0MsrSwYXfsNLFOBbs8PJMW4LYIxeeOe6rUgkWOF7CC9Dh/dduQ1QrsJhmZAEFfd6ByYV+ ;{id = 2854 (zsk), size = 1688b}"
trust-anchor: "example.com. 3600 IN DS 30899 5 1 d4bf9d2e10f6d76840d42ef5913022abcd0bf512"
val-override-date: "20070916134226"
target-fetch-policy: "0 0 0 0 0"
harden-algo-downgrade: no
stub-zone:
name: "."
stub-addr: 193.0.14.129 # K.ROOT-SERVERS.NET.
CONFIG_END
SCENARIO_BEGIN Test validator with multiple algorithm trust anchor without harden
; K.ROOT-SERVERS.NET.
RANGE_BEGIN 0 100
ADDRESS 193.0.14.129
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
. IN NS
SECTION ANSWER
. IN NS K.ROOT-SERVERS.NET.
SECTION ADDITIONAL
K.ROOT-SERVERS.NET. IN A 193.0.14.129
ENTRY_END
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
www.example.com. IN A
SECTION AUTHORITY
com. IN NS a.gtld-servers.net.
SECTION ADDITIONAL
a.gtld-servers.net. IN A 192.5.6.30
ENTRY_END
RANGE_END
; a.gtld-servers.net.
RANGE_BEGIN 0 100
ADDRESS 192.5.6.30
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
com. IN NS
SECTION ANSWER
com. IN NS a.gtld-servers.net.
SECTION ADDITIONAL
a.gtld-servers.net. IN A 192.5.6.30
ENTRY_END
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
www.example.com. IN A
SECTION AUTHORITY
example.com. IN NS ns.example.com.
SECTION ADDITIONAL
ns.example.com. IN A 1.2.3.4
ENTRY_END
RANGE_END
; ns.example.com.
RANGE_BEGIN 0 100
ADDRESS 1.2.3.4
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
example.com. IN NS
SECTION ANSWER
example.com. IN NS ns.example.com.
example.com. 3600 IN RRSIG NS 3 2 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCN+qHdJxoI/2tNKwsb08pra/G7aAIUAWA5sDdJTbrXA1/3OaesGBAO3sI= ;{id = 2854}
example.com. 3600 IN RRSIG NS 5 2 3600 20070926134150 20070829134150 30899 example.com. YTqtYba73HIOQuPr5oDyIX9pfmz1ybEBjwlD/jUgcPmFINUOZ9FeqG6ywgRKwn4AizkKTK00p1sxZYMKxl91wg== ;{id = 30899}
SECTION ADDITIONAL
ns.example.com. IN A 1.2.3.4
ns.example.com. 3600 IN RRSIG A 3 3 3600 20070926135752 20070829135752 2854 example.com. MC0CFQCMSWxVehgOQLoYclB9PIAbNP229AIUeH0vNNGJhjnZiqgIOKvs1EhzqAo= ;{id = 2854}
ns.example.com. 3600 IN RRSIG A 5 3 3600 20070926134150 20070829134150 30899 example.com. Dn1ziMKrc3NdJkSv8g61Y9WNk3+BAuwCwnYzAZiHmkejkSCPViLJN7+f4Conp9l8LkTl50ZnLgoYrrUYNhMj6w== ;{id = 30899}
ENTRY_END
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR AA NOERROR
SECTION QUESTION
ns.example.com. IN AAAA
SECTION ANSWER
SECTION AUTHORITY
example.com. IN NS ns.example.com.
example.com. 3600 IN RRSIG NS 3 2 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCN+qHdJxoI/2tNKwsb08pra/G7aAIUAWA5sDdJTbrXA1/3OaesGBAO3sI= ;{id = 2854}
example.com. 3600 IN RRSIG NS 5 2 3600 20070926134150 20070829134150 30899 example.com. YTqtYba73HIOQuPr5oDyIX9pfmz1ybEBjwlD/jUgcPmFINUOZ9FeqG6ywgRKwn4AizkKTK00p1sxZYMKxl91wg== ;{id = 30899}
SECTION ADDITIONAL
ns.example.com. IN A 1.2.3.4
ns.example.com. 3600 IN RRSIG A 3 3 3600 20070926135752 20070829135752 2854 example.com. MC0CFQCMSWxVehgOQLoYclB9PIAbNP229AIUeH0vNNGJhjnZiqgIOKvs1EhzqAo= ;{id = 2854}
ns.example.com. 3600 IN RRSIG A 5 3 3600 20070926134150 20070829134150 30899 example.com. Dn1ziMKrc3NdJkSv8g61Y9WNk3+BAuwCwnYzAZiHmkejkSCPViLJN7+f4Conp9l8LkTl50ZnLgoYrrUYNhMj6w== ;{id = 30899}
ENTRY_END
; response to DNSKEY priming query
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
example.com. IN DNSKEY
SECTION ANSWER
example.com. 3600 IN DNSKEY 256 3 5 AQPQ41chR9DEHt/aIzIFAqanbDlRflJoRs5yz1jFsoRIT7dWf0r+PeDuewdxkszNH6wnU4QL8pfKFRh5PIYVBLK3 ;{id = 30899 (zsk), size = 512b}
example.com. 3600 IN DNSKEY 256 3 3 ALXLUsWqUrY3JYER3T4TBJIIs70j+sDS/UT2QRp61SE7S3EEXopNXoFE73JLRmvpi/UrOO/Vz4Se6wXv/CYCKjGw06U4WRgRYXcpEhJROyNapmdIKSxhOzfLVE1gqA0PweZR8dtY3aNQSRn3sPpwJr6Mi/PqQKAMMrZ9ckJpf1+bQMOOvxgzz2U1GS18b3yZKcgTMEaJzd/GZYzi/BN2DzQ0MsrSwYXfsNLFOBbs8PJMW4LYIxeeOe6rUgkWOF7CC9Dh/dduQ1QrsJhmZAEFfd6ByYV+ ;{id = 2854 (zsk), size = 512b}
example.com. 3600 IN RRSIG DNSKEY 3 2 3600 20070926134150 20070829134150 2854 example.com. AKIIYDOGHogglFqJK94ZtOnF7EfGikgAyloMNRSMCrQgFaFkmcOyjrc= ;{id = 2854}
example.com. 3600 IN RRSIG DNSKEY 5 2 3600 20070926134150 20070829134150 30899 example.com. J55fsz1GGMnngc4r50xvXDUdaVMlfcLKLVsfMhwNLF+ERac5XV/lLRAc/aSER+qQdsSo0CrjYjy1wat7YQpDAA== ;{id = 30899}
SECTION AUTHORITY
example.com. IN NS ns.example.com.
example.com. 3600 IN RRSIG NS 3 2 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCN+qHdJxoI/2tNKwsb08pra/G7aAIUAWA5sDdJTbrXA1/3OaesGBAO3sI= ;{id = 2854}
example.com. 3600 IN RRSIG NS 5 2 3600 20070926134150 20070829134150 30899 example.com. YTqtYba73HIOQuPr5oDyIX9pfmz1ybEBjwlD/jUgcPmFINUOZ9FeqG6ywgRKwn4AizkKTK00p1sxZYMKxl91wg== ;{id = 30899}
SECTION ADDITIONAL
ns.example.com. IN A 1.2.3.4
ns.example.com. 3600 IN RRSIG A 3 3 3600 20070926135752 20070829135752 2854 example.com. MC0CFQCMSWxVehgOQLoYclB9PIAbNP229AIUeH0vNNGJhjnZiqgIOKvs1EhzqAo= ;{id = 2854}
ns.example.com. 3600 IN RRSIG A 5 3 3600 20070926134150 20070829134150 30899 example.com. Dn1ziMKrc3NdJkSv8g61Y9WNk3+BAuwCwnYzAZiHmkejkSCPViLJN7+f4Conp9l8LkTl50ZnLgoYrrUYNhMj6w== ;{id = 30899}
ENTRY_END
; response to query of interest
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
www.example.com. IN A
SECTION ANSWER
www.example.com. IN A 10.20.30.40
ns.example.com. 3600 IN RRSIG A 3 3 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCQMyTjn7WWwpwAR1LlVeLpRgZGuQIUCcJDEkwAuzytTDRlYK7nIMwH1CM= ;{id = 2854}
www.example.com. 3600 IN RRSIG A 5 3 3600 20070926134150 20070829134150 30899 example.com. JNWECShNE+nCLQwOXJJ3xpUkh2G+FCh5nk8uYAHIVQRse/BIvCMSlvRrtVyw9RnXvk5RR2bEgN0pRdLWW7ug5Q== ;{id = 30899}
SECTION AUTHORITY
example.com. IN NS ns.example.com.
example.com. 3600 IN RRSIG NS 3 2 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCN+qHdJxoI/2tNKwsb08pra/G7aAIUAWA5sDdJTbrXA1/3OaesGBAO3sI= ;{id = 2854}
example.com. 3600 IN RRSIG NS 5 2 3600 20070926134150 20070829134150 30899 example.com. YTqtYba73HIOQuPr5oDyIX9pfmz1ybEBjwlD/jUgcPmFINUOZ9FeqG6ywgRKwn4AizkKTK00p1sxZYMKxl91wg== ;{id = 30899}
SECTION ADDITIONAL
ns.example.com. IN A 1.2.3.4
www.example.com. 3600 IN RRSIG A 3 3 3600 20070926134150 20070829134150 2854 example.com. MC0CFC99iE9K5y2WNgI0gFvBWaTi9wm6AhUAoUqOpDtG5Zct+Qr9F3mSdnbc6V4= ;{id = 2854}
ns.example.com. 3600 IN RRSIG A 5 3 3600 20070926134150 20070829134150 30899 example.com. Dn1ziMKrc3NdJkSv8g61Y9WNk3+BAuwCwnYzAZiHmkejkSCPViLJN7+f4Conp9l8LkTl50ZnLgoYrrUYNhMj6w== ;{id = 30899}
ENTRY_END
RANGE_END
STEP 1 QUERY
ENTRY_BEGIN
REPLY RD DO
SECTION QUESTION
www.example.com. IN A
ENTRY_END
; recursion happens here.
STEP 10 CHECK_ANSWER
ENTRY_BEGIN
MATCH all
REPLY QR RD RA AD DO NOERROR
SECTION QUESTION
www.example.com. IN A
SECTION ANSWER
www.example.com. IN A 10.20.30.40
www.example.com. 3600 IN RRSIG A 5 3 3600 20070926134150 20070829134150 30899 example.com. JNWECShNE+nCLQwOXJJ3xpUkh2G+FCh5nk8uYAHIVQRse/BIvCMSlvRrtVyw9RnXvk5RR2bEgN0pRdLWW7ug5Q== ;{id = 30899}
www.example.com. 3600 IN RRSIG A 3 3 3600 20070926134150 20070829134150 2854 example.com. MC0CFC99iE9K5y2WNgI0gFvBWaTi9wm6AhUAoUqOpDtG5Zct+Qr9F3mSdnbc6V4= ;{id = 2854}
SECTION AUTHORITY
example.com. IN NS ns.example.com.
example.com. 3600 IN RRSIG NS 3 2 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCN+qHdJxoI/2tNKwsb08pra/G7aAIUAWA5sDdJTbrXA1/3OaesGBAO3sI= ;{id = 2854}
example.com. 3600 IN RRSIG NS 5 2 3600 20070926134150 20070829134150 30899 example.com. YTqtYba73HIOQuPr5oDyIX9pfmz1ybEBjwlD/jUgcPmFINUOZ9FeqG6ywgRKwn4AizkKTK00p1sxZYMKxl91wg== ;{id = 30899}
SECTION ADDITIONAL
ns.example.com. IN A 1.2.3.4
ns.example.com. 3600 IN RRSIG A 3 3 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCQMyTjn7WWwpwAR1LlVeLpRgZGuQIUCcJDEkwAuzytTDRlYK7nIMwH1CM= ;{id = 2854}
ns.example.com. 3600 IN RRSIG A 5 3 3600 20070926134150 20070829134150 30899 example.com. Dn1ziMKrc3NdJkSv8g61Y9WNk3+BAuwCwnYzAZiHmkejkSCPViLJN7+f4Conp9l8LkTl50ZnLgoYrrUYNhMj6w== ;{id = 30899}
ENTRY_END
SCENARIO_END

185
testdata/val_ta_algo_missing_dp.rpl vendored Normal file
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@ -0,0 +1,185 @@
; config options
; The island of trust is at example.com
server:
trust-anchor: "example.com. 3600 IN DNSKEY 256 3 3 ALXLUsWqUrY3JYER3T4TBJIIs70j+sDS/UT2QRp61SE7S3EEXopNXoFE73JLRmvpi/UrOO/Vz4Se6wXv/CYCKjGw06U4WRgRYXcpEhJROyNapmdIKSxhOzfLVE1gqA0PweZR8dtY3aNQSRn3sPpwJr6Mi/PqQKAMMrZ9ckJpf1+bQMOOvxgzz2U1GS18b3yZKcgTMEaJzd/GZYzi/BN2DzQ0MsrSwYXfsNLFOBbs8PJMW4LYIxeeOe6rUgkWOF7CC9Dh/dduQ1QrsJhmZAEFfd6ByYV+ ;{id = 2854 (zsk), size = 1688b}"
trust-anchor: "example.com. 3600 IN DS 30899 5 1 d4bf9d2e10f6d76840d42ef5913022abcd0bf512"
trust-anchor: "example.com. 3600 IN DS 30899 7 1 d4bf9d2e10f6d76840d42ef5913022abcd0bf512"
val-override-date: "20070916134226"
target-fetch-policy: "0 0 0 0 0"
harden-algo-downgrade: no
stub-zone:
name: "."
stub-addr: 193.0.14.129 # K.ROOT-SERVERS.NET.
CONFIG_END
SCENARIO_BEGIN Test validator with multiple algorithm missing one
; K.ROOT-SERVERS.NET.
RANGE_BEGIN 0 100
ADDRESS 193.0.14.129
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
. IN NS
SECTION ANSWER
. IN NS K.ROOT-SERVERS.NET.
SECTION ADDITIONAL
K.ROOT-SERVERS.NET. IN A 193.0.14.129
ENTRY_END
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
www.example.com. IN A
SECTION AUTHORITY
com. IN NS a.gtld-servers.net.
SECTION ADDITIONAL
a.gtld-servers.net. IN A 192.5.6.30
ENTRY_END
RANGE_END
; a.gtld-servers.net.
RANGE_BEGIN 0 100
ADDRESS 192.5.6.30
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
com. IN NS
SECTION ANSWER
com. IN NS a.gtld-servers.net.
SECTION ADDITIONAL
a.gtld-servers.net. IN A 192.5.6.30
ENTRY_END
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
www.example.com. IN A
SECTION AUTHORITY
example.com. IN NS ns.example.com.
SECTION ADDITIONAL
ns.example.com. IN A 1.2.3.4
ENTRY_END
RANGE_END
; ns.example.com.
RANGE_BEGIN 0 100
ADDRESS 1.2.3.4
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
example.com. IN NS
SECTION ANSWER
example.com. IN NS ns.example.com.
example.com. 3600 IN RRSIG NS 3 2 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCN+qHdJxoI/2tNKwsb08pra/G7aAIUAWA5sDdJTbrXA1/3OaesGBAO3sI= ;{id = 2854}
example.com. 3600 IN RRSIG NS 5 2 3600 20070926134150 20070829134150 30899 example.com. YTqtYba73HIOQuPr5oDyIX9pfmz1ybEBjwlD/jUgcPmFINUOZ9FeqG6ywgRKwn4AizkKTK00p1sxZYMKxl91wg== ;{id = 30899}
SECTION ADDITIONAL
ns.example.com. IN A 1.2.3.4
ns.example.com. 3600 IN RRSIG A 3 3 3600 20070926135752 20070829135752 2854 example.com. MC0CFQCMSWxVehgOQLoYclB9PIAbNP229AIUeH0vNNGJhjnZiqgIOKvs1EhzqAo= ;{id = 2854}
ns.example.com. 3600 IN RRSIG A 5 3 3600 20070926134150 20070829134150 30899 example.com. Dn1ziMKrc3NdJkSv8g61Y9WNk3+BAuwCwnYzAZiHmkejkSCPViLJN7+f4Conp9l8LkTl50ZnLgoYrrUYNhMj6w== ;{id = 30899}
ENTRY_END
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR AA NOERROR
SECTION QUESTION
ns.example.com. IN AAAA
SECTION ANSWER
SECTION AUTHORITY
example.com. IN NS ns.example.com.
example.com. 3600 IN RRSIG NS 3 2 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCN+qHdJxoI/2tNKwsb08pra/G7aAIUAWA5sDdJTbrXA1/3OaesGBAO3sI= ;{id = 2854}
example.com. 3600 IN RRSIG NS 5 2 3600 20070926134150 20070829134150 30899 example.com. YTqtYba73HIOQuPr5oDyIX9pfmz1ybEBjwlD/jUgcPmFINUOZ9FeqG6ywgRKwn4AizkKTK00p1sxZYMKxl91wg== ;{id = 30899}
SECTION ADDITIONAL
ns.example.com. IN A 1.2.3.4
ns.example.com. 3600 IN RRSIG A 3 3 3600 20070926135752 20070829135752 2854 example.com. MC0CFQCMSWxVehgOQLoYclB9PIAbNP229AIUeH0vNNGJhjnZiqgIOKvs1EhzqAo= ;{id = 2854}
ns.example.com. 3600 IN RRSIG A 5 3 3600 20070926134150 20070829134150 30899 example.com. Dn1ziMKrc3NdJkSv8g61Y9WNk3+BAuwCwnYzAZiHmkejkSCPViLJN7+f4Conp9l8LkTl50ZnLgoYrrUYNhMj6w== ;{id = 30899}
ENTRY_END
; response to DNSKEY priming query
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
example.com. IN DNSKEY
SECTION ANSWER
example.com. 3600 IN DNSKEY 256 3 5 AQPQ41chR9DEHt/aIzIFAqanbDlRflJoRs5yz1jFsoRIT7dWf0r+PeDuewdxkszNH6wnU4QL8pfKFRh5PIYVBLK3 ;{id = 30899 (zsk), size = 512b}
example.com. 3600 IN DNSKEY 256 3 3 ALXLUsWqUrY3JYER3T4TBJIIs70j+sDS/UT2QRp61SE7S3EEXopNXoFE73JLRmvpi/UrOO/Vz4Se6wXv/CYCKjGw06U4WRgRYXcpEhJROyNapmdIKSxhOzfLVE1gqA0PweZR8dtY3aNQSRn3sPpwJr6Mi/PqQKAMMrZ9ckJpf1+bQMOOvxgzz2U1GS18b3yZKcgTMEaJzd/GZYzi/BN2DzQ0MsrSwYXfsNLFOBbs8PJMW4LYIxeeOe6rUgkWOF7CC9Dh/dduQ1QrsJhmZAEFfd6ByYV+ ;{id = 2854 (zsk), size = 512b}
example.com. 3600 IN RRSIG DNSKEY 3 2 3600 20070926134150 20070829134150 2854 example.com. AKIIYDOGHogglFqJK94ZtOnF7EfGikgAyloMNRSMCrQgFaFkmcOyjrc= ;{id = 2854}
example.com. 3600 IN RRSIG DNSKEY 5 2 3600 20070926134150 20070829134150 30899 example.com. J55fsz1GGMnngc4r50xvXDUdaVMlfcLKLVsfMhwNLF+ERac5XV/lLRAc/aSER+qQdsSo0CrjYjy1wat7YQpDAA== ;{id = 30899}
SECTION AUTHORITY
example.com. IN NS ns.example.com.
example.com. 3600 IN RRSIG NS 3 2 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCN+qHdJxoI/2tNKwsb08pra/G7aAIUAWA5sDdJTbrXA1/3OaesGBAO3sI= ;{id = 2854}
example.com. 3600 IN RRSIG NS 5 2 3600 20070926134150 20070829134150 30899 example.com. YTqtYba73HIOQuPr5oDyIX9pfmz1ybEBjwlD/jUgcPmFINUOZ9FeqG6ywgRKwn4AizkKTK00p1sxZYMKxl91wg== ;{id = 30899}
SECTION ADDITIONAL
ns.example.com. IN A 1.2.3.4
ns.example.com. 3600 IN RRSIG A 3 3 3600 20070926135752 20070829135752 2854 example.com. MC0CFQCMSWxVehgOQLoYclB9PIAbNP229AIUeH0vNNGJhjnZiqgIOKvs1EhzqAo= ;{id = 2854}
ns.example.com. 3600 IN RRSIG A 5 3 3600 20070926134150 20070829134150 30899 example.com. Dn1ziMKrc3NdJkSv8g61Y9WNk3+BAuwCwnYzAZiHmkejkSCPViLJN7+f4Conp9l8LkTl50ZnLgoYrrUYNhMj6w== ;{id = 30899}
ENTRY_END
; response to query of interest
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
www.example.com. IN A
SECTION ANSWER
www.example.com. IN A 10.20.30.40
ns.example.com. 3600 IN RRSIG A 3 3 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCQMyTjn7WWwpwAR1LlVeLpRgZGuQIUCcJDEkwAuzytTDRlYK7nIMwH1CM= ;{id = 2854}
www.example.com. 3600 IN RRSIG A 5 3 3600 20070926134150 20070829134150 30899 example.com. JNWECShNE+nCLQwOXJJ3xpUkh2G+FCh5nk8uYAHIVQRse/BIvCMSlvRrtVyw9RnXvk5RR2bEgN0pRdLWW7ug5Q== ;{id = 30899}
SECTION AUTHORITY
example.com. IN NS ns.example.com.
example.com. 3600 IN RRSIG NS 3 2 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCN+qHdJxoI/2tNKwsb08pra/G7aAIUAWA5sDdJTbrXA1/3OaesGBAO3sI= ;{id = 2854}
example.com. 3600 IN RRSIG NS 5 2 3600 20070926134150 20070829134150 30899 example.com. YTqtYba73HIOQuPr5oDyIX9pfmz1ybEBjwlD/jUgcPmFINUOZ9FeqG6ywgRKwn4AizkKTK00p1sxZYMKxl91wg== ;{id = 30899}
SECTION ADDITIONAL
ns.example.com. IN A 1.2.3.4
www.example.com. 3600 IN RRSIG A 3 3 3600 20070926134150 20070829134150 2854 example.com. MC0CFC99iE9K5y2WNgI0gFvBWaTi9wm6AhUAoUqOpDtG5Zct+Qr9F3mSdnbc6V4= ;{id = 2854}
ns.example.com. 3600 IN RRSIG A 5 3 3600 20070926134150 20070829134150 30899 example.com. Dn1ziMKrc3NdJkSv8g61Y9WNk3+BAuwCwnYzAZiHmkejkSCPViLJN7+f4Conp9l8LkTl50ZnLgoYrrUYNhMj6w== ;{id = 30899}
ENTRY_END
RANGE_END
STEP 1 QUERY
ENTRY_BEGIN
REPLY RD DO
SECTION QUESTION
www.example.com. IN A
ENTRY_END
; recursion happens here.
STEP 10 CHECK_ANSWER
ENTRY_BEGIN
MATCH all
REPLY QR RD RA AD DO NOERROR
SECTION QUESTION
www.example.com. IN A
SECTION ANSWER
www.example.com. 3600 IN A 10.20.30.40
www.example.com. 3600 IN RRSIG A 5 3 3600 20070926134150 20070829134150 30899 example.com. JNWECShNE+nCLQwOXJJ3xpUkh2G+FCh5nk8uYAHIVQRse/BIvCMSlvRrtVyw9RnXvk5RR2bEgN0pRdLWW7ug5Q== ;{id = 30899}
www.example.com. 3600 IN RRSIG A 3 3 3600 20070926134150 20070829134150 2854 example.com. MC0CFC99iE9K5y2WNgI0gFvBWaTi9wm6AhUAoUqOpDtG5Zct+Qr9F3mSdnbc6V4= ;{id = 2854}
SECTION AUTHORITY
example.com. 3600 IN NS ns.example.com.
example.com. 3600 IN RRSIG NS 3 2 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCN+qHdJxoI/2tNKwsb08pra/G7aAIUAWA5sDdJTbrXA1/3OaesGBAO3sI= ;{id = 2854}
example.com. 3600 IN RRSIG NS 5 2 3600 20070926134150 20070829134150 30899 example.com. YTqtYba73HIOQuPr5oDyIX9pfmz1ybEBjwlD/jUgcPmFINUOZ9FeqG6ywgRKwn4AizkKTK00p1sxZYMKxl91wg== ;{id = 30899}
SECTION ADDITIONAL
ns.example.com. 3600 IN A 1.2.3.4
ns.example.com. 3600 IN RRSIG A 3 3 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCQMyTjn7WWwpwAR1LlVeLpRgZGuQIUCcJDEkwAuzytTDRlYK7nIMwH1CM= ;{id = 2854}
ns.example.com. 3600 IN RRSIG A 5 3 3600 20070926134150 20070829134150 30899 example.com. Dn1ziMKrc3NdJkSv8g61Y9WNk3+BAuwCwnYzAZiHmkejkSCPViLJN7+f4Conp9l8LkTl50ZnLgoYrrUYNhMj6w== ;{id = 30899}
ENTRY_END
SCENARIO_END

3
util/config_file.c
View file

@ -169,6 +169,7 @@ config_create(void)
cfg->harden_dnssec_stripped = 1;
cfg->harden_below_nxdomain = 0;
cfg->harden_referral_path = 0;
cfg->harden_algo_downgrade = 1;
cfg->use_caps_bits_for_id = 0;
cfg->private_address = NULL;
cfg->private_domain = NULL;
@ -404,6 +405,7 @@ int config_set_option(struct config_file* cfg, const char* opt,
else S_YNO("harden-dnssec-stripped:", harden_dnssec_stripped)
else S_YNO("harden-below-nxdomain:", harden_below_nxdomain)
else S_YNO("harden-referral-path:", harden_referral_path)
else S_YNO("harden-algo-downgrade:", harden_algo_downgrade)
else S_YNO("use-caps-for-id", use_caps_bits_for_id)
else S_SIZET_OR_ZERO("unwanted-reply-threshold:", unwanted_threshold)
else S_STRLIST("private-address:", private_address)
@ -662,6 +664,7 @@ config_get_option(struct config_file* cfg, const char* opt,
else O_YNO(opt, "harden-dnssec-stripped", harden_dnssec_stripped)
else O_YNO(opt, "harden-below-nxdomain", harden_below_nxdomain)
else O_YNO(opt, "harden-referral-path", harden_referral_path)
else O_YNO(opt, "harden-algo-downgrade", harden_algo_downgrade)
else O_YNO(opt, "use-caps-for-id", use_caps_bits_for_id)
else O_DEC(opt, "unwanted-reply-threshold", unwanted_threshold)
else O_YNO(opt, "do-not-query-localhost", donotquery_localhost)

2
util/config_file.h
View file

@ -173,6 +173,8 @@ struct config_file {
int harden_below_nxdomain;
/** harden the referral path, query for NS,A,AAAA and validate */
int harden_referral_path;
/** harden against algorithm downgrade */
int harden_algo_downgrade;
/** use 0x20 bits in query as random ID bits */
int use_caps_bits_for_id;
/** strip away these private addrs from answers, no DNS Rebinding */

2131
util/configlexer.c
View file

File diff suppressed because it is too large Load diff

1
util/configlexer.lex
View file

@ -256,6 +256,7 @@ harden-glue{COLON} { YDVAR(1, VAR_HARDEN_GLUE) }
harden-dnssec-stripped{COLON} { YDVAR(1, VAR_HARDEN_DNSSEC_STRIPPED) }
harden-below-nxdomain{COLON} { YDVAR(1, VAR_HARDEN_BELOW_NXDOMAIN) }
harden-referral-path{COLON} { YDVAR(1, VAR_HARDEN_REFERRAL_PATH) }
harden-algo-downgrade{COLON} { YDVAR(1, VAR_HARDEN_ALGO_DOWNGRADE) }
use-caps-for-id{COLON} { YDVAR(1, VAR_USE_CAPS_FOR_ID) }
unwanted-reply-threshold{COLON} { YDVAR(1, VAR_UNWANTED_REPLY_THRESHOLD) }
private-address{COLON} { YDVAR(1, VAR_PRIVATE_ADDRESS) }

1319
util/configparser.c
View file

File diff suppressed because it is too large Load diff

6
util/configparser.h
View file

@ -193,7 +193,8 @@ extern int yydebug;
VAR_DNSTAP_LOG_CLIENT_QUERY_MESSAGES = 402,
VAR_DNSTAP_LOG_CLIENT_RESPONSE_MESSAGES = 403,
VAR_DNSTAP_LOG_FORWARDER_QUERY_MESSAGES = 404,
VAR_DNSTAP_LOG_FORWARDER_RESPONSE_MESSAGES = 405
VAR_DNSTAP_LOG_FORWARDER_RESPONSE_MESSAGES = 405,
VAR_HARDEN_ALGO_DOWNGRADE = 406
};
#endif
/* Tokens. */
@ -345,6 +346,7 @@ extern int yydebug;
#define VAR_DNSTAP_LOG_CLIENT_RESPONSE_MESSAGES 403
#define VAR_DNSTAP_LOG_FORWARDER_QUERY_MESSAGES 404
#define VAR_DNSTAP_LOG_FORWARDER_RESPONSE_MESSAGES 405
#define VAR_HARDEN_ALGO_DOWNGRADE 406
@ -358,7 +360,7 @@ typedef union YYSTYPE
/* Line 2058 of yacc.c */
#line 362 "util/configparser.h"
#line 364 "util/configparser.h"
} YYSTYPE;
# define YYSTYPE_IS_TRIVIAL 1
# define yystype YYSTYPE /* obsolescent; will be withdrawn */

13
util/configparser.y
View file

@ -118,6 +118,7 @@ extern struct config_parser_state* cfg_parser;
%token VAR_DNSTAP_LOG_CLIENT_RESPONSE_MESSAGES
%token VAR_DNSTAP_LOG_FORWARDER_QUERY_MESSAGES
%token VAR_DNSTAP_LOG_FORWARDER_RESPONSE_MESSAGES
%token VAR_HARDEN_ALGO_DOWNGRADE
%%
toplevelvars: /* empty */ | toplevelvars toplevelvar ;
@ -177,7 +178,7 @@ content_server: server_num_threads | server_verbosity | server_port |
server_minimal_responses | server_rrset_roundrobin | server_max_udp_size |
server_so_reuseport | server_delay_close | server_unblock_lan_zones |
server_dns64_prefix | server_dns64_synthall |
server_infra_cache_min_rtt
server_infra_cache_min_rtt | server_harden_algo_downgrade
;
stubstart: VAR_STUB_ZONE
{
@ -846,6 +847,16 @@ server_harden_referral_path: VAR_HARDEN_REFERRAL_PATH STRING_ARG
free($2);
}
;
server_harden_algo_downgrade: VAR_HARDEN_ALGO_DOWNGRADE STRING_ARG
{
OUTYY(("P(server_harden_algo_downgrade:%s)\n", $2));
if(strcmp($2, "yes") != 0 && strcmp($2, "no") != 0)
yyerror("expected yes or no.");
else cfg_parser->cfg->harden_algo_downgrade =
(strcmp($2, "yes")==0);
free($2);
}
;
server_use_caps_for_id: VAR_USE_CAPS_FOR_ID STRING_ARG
{
OUTYY(("P(server_use_caps_for_id:%s)\n", $2));

2
validator/validator.c
View file

@ -2352,7 +2352,7 @@ primeResponseToKE(struct ub_packed_rrset_key* dnskey_rrset,
struct key_entry_key* kkey = NULL;
enum sec_status sec = sec_status_unchecked;
char* reason = NULL;
int downprot = 1;
int downprot = qstate->env->cfg->harden_algo_downgrade;
if(!dnskey_rrset) {
log_nametypeclass(VERB_OPS, "failed to prime trust anchor -- "