ext-mattermost.nic.cz
Issued by R3
About this certificate
This digital certificate with serial number 04:62:f6:30:72:81:13:9b:30:20:7c:5b:57:c7:75:ef:91:0f was issued on by Let's Encrypt.
With 3 subject alternative names this certificate can be used to secure multiple fqdn's. This certificate has already expired and will cause a warning or error message in the browser it's still listed on this site to allow you to look back on previously issued certificates. If we have found any compliance issues with this certificate they will be shown below. I hope this certificate review is providing you the detailed information in a simple form you where looking for.
We have idenified some issues with this certificate:
- DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
- Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
- Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)
Certificate Subject
CN=ext-mattermost.nic.cz
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:62:f6:30:72:81:13:9b:30:20:7c:5b:57:c7:75:ef:91:0fSerial Number (int): 382124057324926450588958837082977815466255
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: 24:e8:d1:01:5c:94:ab:c8:87:0c:04:46:69:2a:eb:d0:ef:0c:2d:a6
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): 9a:b4:36:40:dc:2c:fd:fe:a4:bb:7f:ed:68:1e:6e:64:88:6c:07:b6
Fingerprint (sha256): 0f:b9:ab:66:2f:17:5b:25:0c:1d:76:2b:18:9f:d5:27:44:81:3f:a1:83:c7:90:1e:ca:32:71:19:9d:db:3c:2f
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.orgCheck the revocation status for certificate ext-mattermost.nic.cz
3
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for ext-mattermost.nic.cz
Public Key Algorithm
RSA
Key Size
4096
Signature Algorithm
SHA256 with RSA
Key Usage
Digital Signature
Key Encipherment
Extended Key Usages
Server Authentication
Client Authentication
Extensions
9 extensions
No
unhandled critical extensions
CA Certificate
This is not a CA certificate
Subject Alternative Names
digitym.gov.cz
digitym.nic.cz
ext-mattermost.nic.cz
digitym.nic.cz
ext-mattermost.nic.cz
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Certificate
The complete raw certificate details for ext-mattermost.nic.cz in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGGDCCBQCgAwIBAgISBGL2MHKBE5swIHxbV8d175EPMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yMzExMjAxNDAzNTVaFw0yNDAyMTgxNDAzNTRaMCAxHjAcBgNVBAMT FWV4dC1tYXR0ZXJtb3N0Lm5pYy5jejCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCC AgoCggIBAKWkKeTiZdz7HcvBHRAFQT/zHGERIep85URJUSkoiduI98lficDGrMj6 rEzp9MVATv91/H9JVZXdtx4b7q93P4So8P03VsqDnBlJ7iwYl9YhozaItAm/l4zF fJOOprUETFMB6tv7Xwzvx83MaRpl6VUqH0FG4JyJXgAML1ZSqET7roHXeMIiFm9g iiOQjCwLVmK/IcZNQTs2Wlc5dj24fmwgFdinfv7iqD9tVUNTAKm8q8Yg7NzPvxdO lvBvjA8klick4viHkQ2vBm8ZlObvxDuXWLti28al5/oJl/JAsIZumCwahMUGUUtd 8snroIk0ahDrIcjSCPV3XAo+W4GMoWdl/c2h7Rv1Fp7hVTPthLCmeAokItquOLHv 3VnmGRMPwwwnmGqg53fEP+Au4mQvRdTila/Ns6tlZkBAWtwtLe51uUNNfR5Yh4H3 Yn9PeYXEZ09zbeSkfUlPAdztTqrsOS+XlewzLLQDgjPpHXZZECt+9IcIG06uXmc9 Ro7JdhXDslHmj8SimHeoWS8s47xx4a8WbFSWyZZ9nsGx5ByDWGXJkcZZhAAfoQAf gwsgZzWgKM/osdrE74peNG4G+H/cro5rnfJZLeE0xtw1j0AFc+nWwZCvjNVeepN4 C1rHYNVzkBJ2pwbO5n1O1eeiICa4R1xyBbAxjF782DH0l4ue/DddAgMBAAGjggI4 MIICNDAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUF BwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFCTo0QFclKvIhwwERmkq69DvDC2m MB8GA1UdIwQYMBaAFBQusxe3WFbLrlAJQOYfr52LFMLGMFUGCCsGAQUFBwEBBEkw RzAhBggrBgEFBQcwAYYVaHR0cDovL3IzLm8ubGVuY3Iub3JnMCIGCCsGAQUFBzAC hhZodHRwOi8vcjMuaS5sZW5jci5vcmcvMEAGA1UdEQQ5MDeCDmRpZ2l0eW0uZ292 LmN6gg5kaWdpdHltLm5pYy5jeoIVZXh0LW1hdHRlcm1vc3QubmljLmN6MBMGA1Ud IAQMMAowCAYGZ4EMAQIBMIIBBQYKKwYBBAHWeQIEAgSB9gSB8wDxAHcASLDja9qm RzQP5WoC+p0w6xxSActW3SyB2bu/qznYhHMAAAGL7UJwJgAABAMASDBGAiEA6eY8 el5OyDTxpR67ueMZXQJ5ti+SZmq6uuH9fz/lq3oCIQDY020WvrYG5VWAs3OMHWe0 WotIhobvrfgmk8UUhPe/CAB2AO7N0GTV2xrOxVy3nbTNE6Iyh0Z8vOzew1FIWUZx H7WbAAABi+1CcFkAAAQDAEcwRQIgS97Gmlv8zGAihmhG1KvMJuBsh8pD3FpFrgsT dtbn2aUCIQD46O5s6XT++N28eD2Cxc601CV7CyhsRc6s2JFEvNF0SzANBgkqhkiG 9w0BAQsFAAOCAQEAR+BPVc2YGF4d8WMAVzUvj+coq/k00l6IUP86niAg2dARJd3V gPuV+xwC04BIaSHla0QSJiJu05xupysSBnhbHJdztveAnTvtkImypSSy6dvshjMH YexBH8xPUfdjq7tKRBkZCCXMhR43Zb8eKFHYsr8UcoXOBUjFg7/eYY2Y9rhaM6II Xc9ISQeU+ufXIms9HNEx8Xmij4ku+RFncfLRWdg6aM2BM7DUTuxiwhl3XONuKd6D qUx66pp9Mry3bqoxU5YhgATA/Ye5bQQT9rKK/NHfbpT/4M3OyJD6GoJyUVjAxG3x CfaHv4iSQm1h1UQ91kg10qTN2eviOEZV28tkPQ== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEApaQp5OJl3Psdy8EdEAVB P/McYREh6nzlRElRKSiJ24j3yV+JwMasyPqsTOn0xUBO/3X8f0lVld23Hhvur3c/ hKjw/TdWyoOcGUnuLBiX1iGjNoi0Cb+XjMV8k46mtQRMUwHq2/tfDO/HzcxpGmXp VSofQUbgnIleAAwvVlKoRPuugdd4wiIWb2CKI5CMLAtWYr8hxk1BOzZaVzl2Pbh+ bCAV2Kd+/uKoP21VQ1MAqbyrxiDs3M+/F06W8G+MDySWJyTi+IeRDa8GbxmU5u/E O5dYu2LbxqXn+gmX8kCwhm6YLBqExQZRS13yyeugiTRqEOshyNII9XdcCj5bgYyh Z2X9zaHtG/UWnuFVM+2EsKZ4CiQi2q44se/dWeYZEw/DDCeYaqDnd8Q/4C7iZC9F 1OKVr82zq2VmQEBa3C0t7nW5Q019HliHgfdif095hcRnT3Nt5KR9SU8B3O1Oquw5 L5eV7DMstAOCM+kddlkQK370hwgbTq5eZz1Gjsl2FcOyUeaPxKKYd6hZLyzjvHHh rxZsVJbJln2ewbHkHINYZcmRxlmEAB+hAB+DCyBnNaAoz+ix2sTvil40bgb4f9yu jmud8lkt4TTG3DWPQAVz6dbBkK+M1V56k3gLWsdg1XOQEnanBs7mfU7V56IgJrhH XHIFsDGMXvzYMfSXi578N10CAwEAAQ== -----END PUBLIC KEY-----
ASN.1 decoded
[c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . [c:2|t:0|true] OtherName . . . . . . . . . . . . [c:0|t:2|false] INTEGER 2 . . . . . . . . [c:0|t:2|false] INTEGER 382124057324926450588958837082977815466255 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption) . . . . . . . . . . . . [c:0|t:5|false] NULL . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.6 (countryName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'US' . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.10 (organizationName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Let's Encrypt' . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3 (commonName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'R3' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-11-20 14:03:55 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-02-18 14:03:54 +0000 UTC . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3 (commonName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'ext-mattermost.nic.cz' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.1 (rsaEncryption) . . . . . . . . . . . . . . . . [c:0|t:5|false] NULL . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (4208 bits) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 675757401128791385393619971723680681104776174746016951400147905524081087453796463408802803293845062918489479046405338106637973258001149144116433902115224340148950694610042481021311081337046325751956275268359564376998848352760999394547326026209463984312651955101595815111190085753430449206708304836289802743352367802474196210393809657423060573020369623674452513285401076655930633843097389980055700445559205083252310267277594855536816086902119211888680170920567061936891454976638831223822928261528844406907906032332360264714404663261056413761642103857687962975503934481197928185395503448971511525796186320874774023743232574267297665757572724904702370091992090522978087860599156556756239548293956257061969689669943139327315109404834320270165176039878332629583087870225590741602724545594055165781319321367677188485784163446759233401502590563143927763212768107890907687608751744487441779054214906491215006337893120102486836711120115786252110829729102574625668454274655046062814192510203693214975560400159956230422295558238669030404943147652645769947469409324981910480830653603819136515075653873034695766077528136721978936005843431829400639821089891406560748730253986827426825065764190299749279366888997086319186119468637137628623382787933 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 65537 . . . . . . . . [c:2|t:3|true] ORAddress . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.15 (keyUsage) . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (4 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (3 bits) 05a0 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.37 (extKeyUsage) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.1 (serverAuth) . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2 (clientAuth) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19 (basicConstraints) . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (2 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.14 (subjectKeyIdentifier) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes) 24e8d1015c94abc8870c0446692aebd0ef0c2da6 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35 (authorityKeyIdentifier) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 142eb317b75856cbae500940e61faf9d8b14c2c6 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1 (authorityInfoAccess) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (73 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.1 (ocsp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r3.o.lencr.org' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2 (caIssuers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r3.i.lencr.org/' . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17 (subjectAltName) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (57 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'digitym.gov.cz' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'digitym.nic.cz' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ext-mattermost.nic.cz' . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32 (certificatePolicies) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (12 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.23.140.1.2.1 (Domain Validation Certificates Policy) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.11129.2.4.2 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (246 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes) 00f100770048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018bed4270260000040300483046022100e9e63c7a5e4ec834f1a51ebbb9e3195d0279b62f92666ababae1fd7f3fe5ab7a022100d8d36d16beb606e55580b3738c1d67b45a8b488686efadf82693c51484f7bf08007600eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018bed427059000004030047304502204bdec69a5bfccc6022866846d4abcc26e06c87ca43dc5a45ae0b1376d6e7d9a5022100f8e8ee6ce974fef8ddbc783d82c5ceb4d4257b0b286c45ceacd89144bcd1744b . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption) . . . . . . . . [c:0|t:5|false] NULL . . . . [c:0|t:3|false] BIT STRING (2048 bits) 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