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DNS と TLS のビミョーな関係
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Tomoyuki Sahara
July 24, 2015
Technology
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DNS と TLS のビミョーな関係
DNS Summer Days 2015 のライトニングトークの発表資料
Tomoyuki Sahara
July 24, 2015
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Transcript
%/4ͱ5-4ͷ Ϗϛϣʔͳؔ ࠤݪ۩ גࣜձࣾΠϯλʔωοτΠχγΞςΟϒ
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࡞͍ͬͯͯࠔͬͨ͜ͱɻ
υϝΠϯ໊ͱ5-4ͷؔ
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)5514 )551Λ҆શʹͨ͠ͷ
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ͱ
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ͷରԠ͚͕ɺ
04ϒϥβͷ։ൃݩ͕ೝΊͨɺ ೝূہʹΑͬͯอূ͞Ε͍ͯΔɺ ূ໌ॻΛͬͯݕূ͞Εͨ͜ͱɺ Λͬͯ҆શͩͱ͍ͯ͠Δɻ
&7ূ໌ॻͩͱ ͏ͪΐͬͱ Θ͔Γ͍͢
None
υϝΠϯ໊ ίϯςϯπ )5.-
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υϝΠϯ໊ ίϯςϯπ αʔό X.509 Certificate TLS on TCP ͕͜͜ ͋͏͍
ΩϞ ͍ͷ ϫΠϧυΧʔυূ໌ॻ
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ϫΠϧυΧʔυจࣈ ˎ ελʔ ҙͷจࣈྻʹϚον
*.google.com news.google.com maps.google.com images.google.com video.google.com plus.google.com play.google.com
ͳΜͯศར—
Μ ͻΐͬͱͯ͠ʜ
࠷ڧͷূ໌ॻ “*”
Y
RFC2818 3.1.: Names may contain the wildcard character * which
is considered to match any single domain name component or component fragment.
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Ͱ“*.jp”ͳΒʁ
PPS Y
࣮ґଘPS[
”*.jp”ͱ͍͏ϫΠϧυΧʔυূ໌ॻΛ ड͚ೖΕΔ ड͚ೖΕͳ͍ 1ZUIPO 3VCZ 4BGBSJ DVSM .BD XHFU
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“*.jp”ͳΜͯূ໌ॻΛ ৴͡Δͷ੬ऑੑͩʂ ͍͍ͤ͡Όͳ͍͔
Ͱ“*.google”ͳΒ
PPS Y ঢ়گ“*.jp” ͱมΘΒͳ͍ɻ
None
͑ʔɺԿѱ͍͜ͱ ͯ͠ͳ͍ͷʹɻ
None
ཁ͢Δʹ୯Ұͷཧओମ ͷݩʹӡӦ͞Ε͍ͯΔͱ ূ໌Ͱ͖Εྑ͍
͋ɺ͜ΕͲ͔͜Ͱฉ͍ͨɻ
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ͱɺ͍͏Θ͚Ͱ
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͓͠·͍