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Let's Let's Encrypt
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Kohei Ota
January 23, 2018
Technology
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Let's Let's Encrypt
Kohei Ota
January 23, 2018
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Transcript
LET’S ENCRYPT ͬͯΈΑ͏ͷձ INDUCTOR@DISCORDΠϯϑϥษڧձ
ςΩετ ຊͷΞδΣϯμ ▸ ࣗݾհ ▸ SSLͷΈʹ͍ͭͯ ▸ Let's Encryptʹ͍ͭͯ ▸
SSLূ໌ॻΛઃஔ͢Δ ▸ αʔόʔͷίϯϑΟάΛ৮ͬͯΈΔ ▸ ϔομͱ͔ͷ֬ೝͷํ
ςΩετ ͓લͩΕͩΑ ▸ Wiki wo yonde kudasai ▸ https://wiki.infra-workshop.tech/user/inductor ▸
σʔληϯλʔͷதͰαʔόʔͱ͔NWͱ͔ΆͪΆͪͯͨ͠ ӡ༻ͷதͷਓΛͬͯͨ ▸ ࠓPHP/Android Javaͱ͔։ൃͯ͠Δ ▸ ࣍ͷࣄͱ͋ΔاۀͷDevOpsܥΠϯϑϥ෦ୂΛ༧ఆ
ςΩετ SSLͷ؆୯ͳ͘͠Έ ▸ ެ։伴ೝূͱڞ௨伴ೝূͷϋΠϒϦου ▸ ࠷ॳͷ伴ަ࣌ͷΈެ։伴Λ͏ ▸ ଓཱ֬ޙΫϥΠΞϯτ͝ͱʹಠཱͷڞ௨伴Ͱ௨৴͢Δ ▸ SSHͰΑ͘ΘΕΔ伴ೝূ
ެ։伴ೝূ ▸ ᷿ͰͷΞΫηϥϨʔγϣϯ ϒʔετͱͳΜͷؔ ͋Γ·ͤΜ
ςΩετ ެ։伴ೝূͱ ▸ ެ։伴ɾൿີ伴ͱݺΕΔ2छྨͷ伴Λͬͯ҉߸Խ௨৴Λߦ͏ํ๏ ▸ ެ։伴ɿΈΜͳʹ͢҉߸ԽΛ͔͚ΔͨΊͷ伴 ▸ ൿີ伴ɿαʔόʔ͚͕ͩ࣋ͭ෮߸Խ༻ͷ伴 ▸ ϦΫΤετ࣌ʹެ։伴Λड͚औͬͨΫϥΠΞϯτ͕ɺใΛެ։伴Ͱ҉߸Խ্ͨ͠Ͱαʔ
όʔʹૹ৴ˠαʔόʔଆൿີ伴ΛͬͯதΛݟΔ ▸ αʔόʔ্ʹ͋Δൿີ伴Ͱ͔͠த͕Θ͔Βͳ͍Αʂͱ͍͏Έ ▸ ϝϦοτɿͲͷϢʔβʔʹରͯ͠ಉ͡ެ։伴ΛͤΔͷͰɺ伴ͷཧָ͕ɻൿີ伴Λαʔ όʔ͔Β౪·Εͳ͍ݶΓ(ཧ্)҆શ ▸ σϝϦοτɿΫϥΠΞϯτଆͱαʔόʔଆͰҟͳΔ伴Λ͏ͨΊॲཧ͕ෳࡶɺ·ͨɺύ ϑΥʔϚϯεѱ͍
ςΩετ ڞ௨伴ೝূͱ ▸ ҉߸Խɾ෮߸Խʹಉ͡伴Λ༻͍Δ҉߸ํࣜ ▸ ΈΜͳͰಉ͡伴Λ͏ͱΈΜͳ͕σʔλΛݟΕ͍ͯͷͰɺ ී௨ΫϥΠΞϯτ͝ͱʹผʑͷ伴Λੜͯ͠ཧ͢Δ ▸ ϝϦοτɿ伴ͷछྨ͕1ͭͳͷͰܭࢉ͕͍ ▸
σϝϦοτɿΫϥΠΞϯτ͕૿͑Δຖʹ伴ͷ͕ଟ͘ͳΔͷ Ͱཧ͕େมɻ·ͨɺڞ௨伴Λ࠷ॳʹ͢ͱ͖ʹใ͕౪· Εͯ͠·͏ͱɺ෮߸͞Εͯ͠·͏ͷͰ͍
ςΩετ վΊͯɺSSLͷ؆୯ͳ͘͠Έ ▸ ެ։伴ೝূͱڞ௨伴ೝূͷϋΠϒϦου ▸ ࠷ॳͷ伴ަ࣌ͷΈެ։伴Λ͏(࠷ॳ͚ͩܭࢉ͕ͪΐ͍ॏ͍) ▸ ଓཱ֬ޙΫϥΠΞϯτ͝ͱʹಠཱͷڞ௨伴Ͱ௨৴͢Δ(͋ͱ·͠) ▸ SSHͰΑ͘ΘΕΔ伴ೝূ
ެ։伴ೝূ ▸ ᷿ͰͷΞΫηϥϨʔγϣϯ ϒʔετͱͳΜͷؔ ͋Γ·ͤΜ
ςΩετ WHAT IS LET’S ENCRYPT? ▸ Let's EncryptmozillaɺAkamaiɺCiscoɺGoogleɺ FacebookͳͲΛΛ͡Ίͱͨ͠େखITاۀͷࢧԉΛड͚ͯ 2014ʹઃ͞ΕͨϓϩδΣΫτͰɺݸਓͰ৴པ͞Εͨ
αʔόূ໌ॻΛແྉͰൃߦ͢Δ͜ͱ͕Ͱ͖Δ͓खܰαʔϏε Ͱ͢ɻ ▸ 2016ͷय़ΑΓਖ਼ࣜʹαʔϏε͕։࢝͠ɺओཁͳ࠷৽OSͰ ͋ΕඞཁͳύοέʔδͷಋೖඇৗʹεϜʔζʹߦ͏͜ ͱ͕Ͱ͖·͢ɻ
ςΩετ ແྉͰূ໌ॻशಘͰ͖Δͬͯʁ ▸ Ұൠతʹɺ৴པࡁΈͷSSLূ໌ॻΛऔಘ͢ΔͨΊʹຊਓ֬ೝ͕ඞཁͰ͢ɻ Let's encryptͰɺݸਓใΛΘͣҎԼ݅ͷͱͰূ໌ॻΛൃߦ͍ͯ͠·͢ɻ ▸ 1. DVূ໌ॻͷΈൃߦͰ͖Δɻ
͜Εɺॴࡏ֬ೝͳͲͷ৹ࠪΛؚΉOVূ໌ॻͳͲൃߦͰ͖ͳ͍͜ͱΛҙຯ͠· ͢ɻ ৴པੑͷ໘Ͱݴ͑ɺݸਓɾݕূ༻ͳͲɺ࠷ݶͷ༻్ʹ͏ͷ͕ݡ໌Ͱ͢ɻ ▸ 2. ূ໌ॻͷ༗ޮظݶ3ϲ݄ͷΈɻ ແྉͰ͋Δ͜ͱɺສ͕ҰͷࣄނͳͲΛ͙ͨΊʹ͜ͷظؒΛઃఆ͍ͯ͠Δͦ ͏Ͱ͢ɻ
ςΩετ ͰɺΊΜͲ͍͘͞ΜͰ͠ΐ͏ʁ ▸ ࠓͷͱ͜ΖϫΠϧυΧʔυʹରԠͯ͠ͳ͍ͷͰαϒυϝΠϯ͝ͱʹशಘ͕ඞཁͰ͢ (ෳαϒυϝΠϯͱ͔·ͱΊͯऔಘ͢ΔΦϓγϣϯ͋Γ·͢) ▸ ϫΠϧυΧʔυࠓͷ2݄ʹରԠ༧ఆͬͯެࣜͰॻ͍ͯ͋Γ·͕͢ɺ ͱͱ1݄͍ͬͯͬͯͨΜͰదʹظ͓͖ͯ͠·͠ΐ͏ ▸ ACMEϓϩτίϧͱ͍͏ূ໌ॻࣗಈൃߦͷϓϩτίϧΛ͏ͷͰɺίϚϯυҰൃͰҰॠͰऔಘ
Ͱ͖·͢ɻ ▸ ༷ΦʔϓϯͳͷͰɺίϚϯυΛࣗͰ࡞Γ͍ͨͬͯਓͰେৎʂ ▸ Apacheͱ͔nginxʹউखʹઃఆΛՃͯ͘͠ΕΔίϚϯυΦϓγϣϯ͋Γ·͕͢ɺݱࡏTLS SNIνϟϨϯδʹ੬ऑੑ͕ݟ͔͍ͭͬͯΔͨΊ࣮࣭͑·ͤΜɻ ▸ 3ϲ݄ͷظݶɺࣗಈߋ৽ʹ͢ΕΑ͍Ͱ͢ɻ
ςΩετ Δ͜ͱ(Ͳ͏ͤͩ͠HTTP/2ͱ͔ͬͱ͜) ▸ αʔόʔΛ༻ҙ͢Δ ▸ DNSͷAϨίʔυΛ͋ͯΔ ▸ certbotͰূ໌ॻΛऔಘ͢Δ ▸ αʔόʔͷઃఆʹॻ͖Ճ͑Δ
▸ ͓ΘΓ