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Let's Encryptで始めるSSL証明書
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chamaharun
July 07, 2018
Technology
1
300
Let's Encryptで始めるSSL証明書
OSC北海道2018で発表しました。
https://www.ospn.jp/osc2018-do/modules/eguide/event.php?eid=46
chamaharun
July 07, 2018
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Transcript
-FUT&ODSZQU Ͱ࢝ΊΔ44-ূ໌ॻ খྛɹ !DIBNBIBSVO
ൃදऀհ ΠϯϑϥΤϯδχΞ ւಓग़04$ʢͨͿΜʣ ϗεςΟϯάܥاۀͰαʔόӡ༻Λ୲ ΠϥετਤղͰΑ͘Θ͔Δ *5Πϯϑϥͷجૅࣝ ˡܠʹ͋Γ·͢ʂ 4PGUXBSF%FTJHO ΤϐιʔυͰ֮͑Δ6/*9ίϚϯυ খྛɹʢ!DIBNBIBSVOʣ
͜Μͳهࣄॻ͖·ͨ͠ -FUT&ODSZQU DFSUCPU ΛͬͯϫΠϧυΧʔυূ໌ॻ͢Δʂ ͋ͱͪΐͬͱ IUUQTRJJUBDPNDIBNBIBSVOJUFNTCDEDDGFCE -FUT&ODSZQU DFSUCPU ͰϫΠϧυΧʔυূ໌ॻͰ͖ͨ
IUUQTRJJUBDPNDIBNBIBSVOJUFNTDCCBCDCD ʮϫΠϧυΧʔυͬͯΈͨʯܥͰຊॳ͔
ࠓ͓͑͢Δ͜ͱ w -FUT`T&ODSZQUͱ w -FU`T&ODSZQUͷ͍Ͳ͜Ζ w -FU`T&ODSZQUΛ༻͍ͨ44-ূ໌ॻͷऔಘɾߋ৽ํ๏ w -FU`T&ODSZQUͷϫΠϧυΧʔυূ໌ॻରԠͱ %/4ϓϥάΠϯͷհ
ࠓΒͳ͍͜ͱ w ҰاۀɾαʔϏεͷએɾ൷ ͨͩ͠ɺศར͔ͩΒͨΓલʹͳͬͯཉ͍͠ɺ ͱ͍͏ͷΛআ͘ w 44-Λࢧ͑Δٕज़ͷࡉ͔͍෦ͷղઆ
44-ͬͯԿ͚ͩͬ w 44-4FDVSF4PDLFU-BZFS w ޙܧن֨5-45SBOTQPSU-BZFS4FDVSJUZ w ௨৴Λ҉߸Խ͢Δ͜ͱʹΑΓ౪ௌɾվ͟Μʹڧ͍ϓϩτ ίϧ w
)55144.514'514ͳͲɺैདྷͷϓϩτίϧΛ 4FDVSFʹ͢ΔׂΛ୲͏
ͳͥࠓ44-ͳͷ͔ w ηΩϡϦςΟҙࣝͷߴ·ΓʹΑΓ)5514͕ͨΓલʹͳ Γͭͭ͋Δ w Ͱʙͷීٴ HPPHMFௐɺϓϥοτϗʔϜผ w DISPNF
ϦϦʔε༧ఆ ͔Βશͯͷ)551 αΠτʹܯࠂ͕ग़ΔΑ͏ʹ IUUQTCMPHDISPNJVNPSHBTFDVSFXFCJTIFSFUPTUBZIUNM IUUQTUSBOTQBSFODZSFQPSUHPPHMFDPNIUUQTPWFSWJFX IMKB
44-ͷΈΛ؆୯ʹ ϦΫΤετ ূ໌ॻɾެ։伴 伴ަ ҆શͳ௨৴ ΫϥΠΞϯτ αʔό
44-ূ໌ॻ w ௨৴ઌͷαʔό͕ຊͰ͋Δূ໌ w ೝূہʹΑΓൃߦ͞ΕΔ w छྨ͋Δ ӡӦऀ ೝূہ αʔό
ਃɾࢧ͍ ೝূɾൃߦ ઃஔ ূ໌ॻ
44-ূ໌ॻ w ূ໌ॻࣗମͷূ໌ূ໌ॻʹΑΓݕূ͞ΕΔ w ֊ߏͷূ໌ॻʹϧʔτূ໌ॻ w ϧʔτূ໌ॻ௨ৗϒϥβʹΠϯετʔϧ͞Ε͍ͯΔ w ֊ߏΛḷΕͳ͍ূ໌ॻʹܯࠂ͕ग़Δ αʔόͷূ໌ॻ
தؒূ໌ॻ ϧʔτূ໌ॻ ূ໌ ূ໌
44-ূ໌ॻͷछྨͱՁ֨ ೝূ ͢Δͷ ৴པੑ Ձ֨ %7 υϝΠϯ ॴ༗ऀ ઍ
07 ӡӦ৫ ిͳͲ த ສ &7 ӡӦ৫ اۀ%#ͳͲ ߴ ສ &7ূ໌ॻͰ ΞυϨεόʔʹاۀ໊͕ೖΔ ֬ೝ͢Δͷ͕૿͑Δʹ࿈Ε ৴པੑɾՁ֨ɾೲظ૿
ແྉͷ44-ূ໌ॻ ৴པੑͲ͏ͳͷʁ ͲΜͳͷ͕͋Δͷʁ υϝΠϯϨϕϧͰͷೝূ ʹߴ͍৴པੑ͕ٻΊΒΕΔڥͰෆ͖ ݸਓناۀͰ։ൃڥͳͲͰ༗༻ ࣗݾॺ໊ূ໌ॻ 4UBSU$0. 8P4JHOˠͰ৽نൃߦఀࢭ -FU`T&ODSZQUˠࠓͷຊ
-FU`T&ODSZQU w *43( *OUFSOFU4FDVSJUZ3FTFBSDI(SPVQ ͕ӡӦ͢Δೝূہ w औಘɾߋ৽ͳͲͷखଓ͖͕ࣗಈԽ͞Ε͍ͯΔ w %7ূ໌ॻΛແྉͰར༻Մೳ
w ূ໌ॻͷ༗ޮظݶ
Ϩϯλϧαʔό֤ࣾͰͷ ରԠਐΉ w ϩϦϙοϓ w ΤοΫεαʔόʔ w ͘͞ΒͷϨϯλϧαʔό w ΧΰϠɾδϟύϯ
ͳͲ ίϚϯυୟ͔ͣίϯτϩʔϧύωϧ͔Βૢ࡞Ͱ͖Δ߹
"$.&ϓϩτίϧ "$.&ΫϥΠΞϯτ "$.&αʔό 8FCαʔό %/4αʔό υϝΠϯॴ༗ऀ ૢ࡞ νϟϨϯδཁٻ จࣈྻΛࢦఆ จࣈྻΛઃஔ
ΞΫηεɾ֬ೝ υϝΠϯॴ༗ऀͷೝূ͔Βূ໌ॻͷൃߦ·ͰΛࣗಈԽ υϝΠϯॴ༗ऀʹจࣈྻΛ༩͑ɺ %/4αʔό͘͠8FCαʔόʹԠͤ͞Δ
)551ೝূͱ%/4ೝূ υϝΠϯʹ595ϨίʔυΛՃͰ͖Δඞཁ͕͋Δ ֎෦ʹ8FCαʔόΛެ։͢Δඞཁ͕͋Δ %/4ೝূ )551ೝূ ֎෦ʹ8FCαʔόΛެ։͢Δඞཁ͕ͳ͍ ෦͚αΠτͳͲͰ͑Δ ϫΠϧυΧʔυূ໌ॻͰ%/4ೝূඞਢ ݱࡏ
ಋೖͯ͠ΈΔ w ZVN BQUͷύοέʔδϚωʔδϟͰ؆୯ʹΠϯετʔ ϧ w QJQܦ༝ͰΠϯετʔϧՄೳ w ֤छϓϥάΠϯ͕ॆ࣮ ެࣜਪΫϥΠΞϯτɿDFSUCPU
IUUQTDFSUCPUF⒎PSHɹͰΞʔΩςΫνϟΛબˠ࠷దͳΠϯετʔϧํ๏
XFCSPPUϓϥάΠϯ )551ೝূΛ؆୯ʹ͢ΔϓϥάΠϯ ೝূ༻จࣈྻͷϑΝΠϧΛಛఆͷύεʹ࡞ͯ͘͠ΕΔ DFSUCPUDFSUPOMZ XFCSPPU NϝʔϧΞυϨε BHSFFUPT NBOVBMQVCMJDJQMPHHJOHPL EUFTUPTBLFPOMJOF XVTSTIBSFOHJOYIUNM
NBOVBMϓϥάΠϯͳ͠ EυϝΠϯ NϝʔϧΞυϨε NBOVBMQVCMJDJQMPHHJOHPL*1ΞυϨε͕ه͞ΕΔࣄʹಉҙ BHSFFUPTنʹಉҙ Xೝূ༻จࣈྻͷϑΝΠϧͷύεɹ ύεXFMMLOPXOBDNFDIBMMFOHF
*.1035"/5/05&4 $POHSBUVMBUJPOT:PVSDFSUJpDBUFBOEDIBJOIBWFCFFOTBWFEBU FUDMFUTFODSZQUMJWFUFTUPTBLFPOMJOFGVMMDIBJOQFN :PVSLFZpMFIBTCFFOTBWFEBU FUDMFUTFODSZQUMJWFUFTUPTBLFPOMJOFQSJWLFZQFN :PVSDFSUXJMMFYQJSFPO5PPCUBJOBOFXPSUXFBLFE WFSTJPOPGUIJTDFSUJpDBUFJOUIFGVUVSF TJNQMZSVODFSUCPU BHBJO5POPOJOUFSBDUJWFMZSFOFX BMM
PGZPVSDFSUJpDBUFT SVO DFSUCPUSFOFX *GZPVMJLF$FSUCPU QMFBTFDPOTJEFSTVQQPSUJOHPVSXPSLCZ %POBUJOHUP*43(-FUT&ODSZQUIUUQTMFUTFODSZQUPSHEPOBUF %POBUJOHUP&''IUUQTF⒎PSHEPOBUFMF
ߋ৽؆୯ʹ DFSUCPUSFOFXίϚϯυ ༗ޮظݶ͕ΓΛ͍ͬͯͨΒߋ৽ QPTUIPPLΦϓγϣϯͰ8FCαʔόΛϦϩʔυ͢Δͱศར DSPOͳͲͰఆظతʹ࣮ߦ͢Δ͜ͱͰظݶΕΛࢭ DFSUCPUSFOFXUJNFS 8FCαʔόͷϦϩʔυFUDTZTDPOpHDFSUCPUͷ1045@)00,ʹ TZTUFNDUMFOBCMFOPXDFSUCPUSFOFXUJNFS TZTUFNEUJNFS༻ઃఆϑΝΠϧ͕༧ΊΠϯετʔϧ͞Ε͍ͯΔ
ෳυϝΠϯʹରͯ͠ ൃߦ͢Δ w 4"/4VCKFDU"MUFSOBUJWF/BNF w EΦϓγϣϯΛෳ͚ͭΔ͜ͱͰෳυϝΠϯରԠͷূ ໌ॻʹͳΔˠҰ൪࠷ॳͷυϝΠϯ͕දʹͳΔ w 8FCαʔόͰɹXFMMLOPXOBDNFDIBMMFOHFɹΛ ಉ͡σΟϨΫτϦΛࢀর͢ΔΑ͏ʹ͢Δͱศར
w ࢁαϒυϝΠϯՃͯ͠ཧ͕໘ ˠϫΠϧυΧʔυূ໌ॻ
ϫΠϧυΧʔυূ໌ॻ ͲͷಉҰ֊αϒυϝΠϯʹରͯ͠༻Ͱ͖Δূ໌ॻ FYBNQMFDPN XXXFYBNQMFDPN NBJMFYBNQMFDPN UFTUXXXFYBNQMFDPN ⭕ ❌ FYBNQMFDPN
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ϫΠϧυΧʔυূ໌ॻͷ͍ॴ αϒυϝΠϯ͕ࢁ͋Δ࣌ ؾ͔ͮΕͨ͘ͳ͍αϒυϝΠϯ͕ଘࡏ͢Δ࣌ IUUQTUXJUUFSDPN@ZZV@TUBUVT ͳͲ
ϫΠϧυΧʔυূ໌ॻ Λऔಘͯ͠ΈΔ DFSUCPUDFSUPOMZNBOVBM E DSLCDP NϝʔϧΞυϨε BHSFFUPT NBOVBMQVCMJDJQMPHHJOHPL QSFGFSSFEDIBMMFOHFTEOT TFSWFSIUUQTBDNFWBQJMFUTFODSZQUPSHEJSFDUPSZ
NBOVBMϓϥάΠϯͳ͠ EυϝΠϯ NϝʔϧΞυϨε NBOVBMQVCMJDJQMPHHJOHPL*1ΞυϨε͕ه͞ΕΔࣄʹಉҙ QSFGFSSFEDIBMMFOHFTೝূํ๏ɹEOTඞਢ TFSWFSೝূαʔό"$.&Wαʔόඞਢ
ίϚϯυग़ྗ 4BWJOHEFCVHMPHUPWBSMPHMFUTFODSZQUMFUTFODSZQUMPH 1MVHJOTTFMFDUFE"VUIFOUJDBUPSNBOVBM *OTUBMMFS/POF4UBSUJOHOFX)5514 DPOOFDUJPO BDNFWBQJMFUTFODSZQUPSH0CUBJOJOHBOFXDFSUJpDBUF 1FSGPSNJOHUIFGPMMPXJOHDIBMMFOHFTEOTDIBMMFOHFGPSDSLCDP 1MFBTFEFQMPZB%/4595SFDPSEVOEFSUIFOBNF@BDNFDIBMMFOHFDSLCDP
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595ϨίʔυΛखಈͰՃ
595ϨίʔυΛөޙ *.1035"/5/05&4 $POHSBUVMBUJPOT:PVSDFSUJpDBUFBOEDIBJOIBWFCFFOTBWFEBU FUDMFUTFODSZQUMJWFDSLCDPGVMMDIBJOQFN :PVSLFZpMFIBTCFFOTBWFEBU FUDMFUTFODSZQUMJWFDSLCDPQSJWLFZQFN :PVSDFSUXJMMFYQJSFPO5PPCUBJOBOFXPSUXFBLFE WFSTJPOPGUIJTDFSUJpDBUFJOUIFGVUVSF TJNQMZSVODFSUCPU BHBJO5POPOJOUFSBDUJWFMZSFOFX
BMM PGZPVSDFSUJpDBUFT SVO DFSUCPUSFOFX *GZPVMJLF$FSUCPU QMFBTFDPOTJEFSTVQQPSUJOHPVSXPSLCZ %POBUJOHUP*43(-FUT&ODSZQUIUUQTMFUTFODSZQUPSHEPOBUF %POBUJOHUP&''IUUQTF⒎PSHEPOBUFMF
%/4ͷϓϥάΠϯ͕ศར w ূ໌ॻͷൃߦɾߋ৽࣌ʹ595ϨίʔυΛՃ͢Δͷ໘ w ϓϥάΠϯʹͤΔͱ͍͏ख͋Δ w DMPVEqBSF w EJHJUBMPDFBO w
HPPHMFDMPVEEOT w "84SPVUF ͳͲछྨͷ%/4αʔϏε3'$ʹରԠ
(PPHMF$MPVE%/4 ͰͬͯΈͨ ʮ"1*ͱαʔϏεʯˠ ʮೝূใΛ࡞ʯˠ ʮαʔϏεΞΧϯτΩʔʯ ೝূใΛ+40/Ͱμϯϩʔυ +40/ϑΝΠϧͷύʔϛογϣϯΛʹมߋ
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EOTHPPHMFΦϓγϣϯΛࢦఆ ύοέʔδϚωʔδϟͰDFSUCPUEOTHPPHMFΛΠϯετʔϧ ূ໌ॻൃߦྃʂ
"843PVUF ͰͬͯΈͨ ʮ*".ʯˠϢʔβʔΛՃ ʮ"NB[PO3PVUF%PNBJOT'VMM"DDFTTʯΛΞλον dBXTDPOpHʹ BXT@BDDFTT@LFZ@JEͱBXT@TFDSFU@BDDFTT@LFZΛՃ
DFSUCPUDFSUPOMZ EOTSPVUF EPTBLFPOMJOF NϝʔϧΞυϨε BHSFFUPT NBOVBMQVCMJDJQMPHHJOHPL dBXTDPOpH͕ಡΈࠐ·Εɺ%/4ʹ595Ϩίʔυ͕Ճ͞ΕΔ EOTSPVUFΦϓγϣϯΛ͚ͭΔ͚ͩ ূ໌ॻൃߦྃʂ
ࠓޙରԠ༧ఆʁ w "[VSF%/4 w -JOPEF w ͘͞ΒͷΫϥυ w (FIJSO%/4 w
(PEBEEZ IUUQTHJUIVCDPNDFSUCPUDFSUCPUJTTVFT RJT"QS JT"PQFO MBCFM"BSFB" EOT ༗ࢤʹΑΓ13͕ग़͞Ε͍ͯΔ
·ͱΊ w -FU`T&ODSZQUΛ͑ແྉɾखܰʹ 44-ূ໌ॻΛར༻Ͱ͖Δ w ϫΠϧυΧʔυʹରԠͨ͠ͷͰߋʹ͍͘͢ w %/4ϓϥάΠϯΛ͑ΑΓ؆୯ʹ w ࣭ͳͲ͋Ε!DIBNBIBSVO·Ͱ
w ࠙ձߦ͖·͢ʂ