chat.astro.rug.nl

Issued by R3

About this certificate

This digital certificate with serial number 03:35:5c:4a:b9:ae:99:86:0a:1a:f7:fa:6f:73:ce:5e:91:d5 was issued on by Let's Encrypt.

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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

Certificate Subject

CN=chat.astro.rug.nl

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:35:5c:4a:b9:ae:99:86:0a:1a:f7:fa:6f:73:ce:5e:91:d5
Serial Number (int): 279494500213749212544306880426725913563605
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 84:58:ee:9a:da:cc:19:38:3d:f4:33:d6:00:85:c5:1d:06:38:ba:59
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 9c:91:20:79:e4:d6:c5:ae:36:87:c4:7e:78:d2:20:18:62:fd:56:83
Fingerprint (sha256): 09:17:ca:c1:62:a5:81:90:c9:04:8a:c4:ca:a0:d3:49:d2:4b:46:21:ce:b3:f3:06:c4:67:ba:f6:ac:64:88:88

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate chat.astro.rug.nl

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for chat.astro.rug.nl

Public Key Algorithm

RSA

Key Size

2048

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

chat.astro.rug.nl

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Certificate

The complete raw certificate details for chat.astro.rug.nl in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAu3a/jLxH5F/elJWzb4CO
GUFEj1lgjBQXvteHYV9kvtrcMOFJ87axW+/EHcxyb2U9BrmX1vpAT3veykyQ7cXd
mSk29//Z5H5iHlrg5bam6HqhCb0WN04UsfNTF3/KzpgY6GLjG5VGBpeJE3SxJnEm
FRBtfauMwPQ0kKCvRHLP/InIT0la7Nb7TZslRqH94mYFCJArFfg3AvTpJ9uxmPyL
5pwj4fr/8ANswAET79VU0LRG5j0VKDNt2opQuzHbGkyXPonmUp8JEFfHi2drO56Y
ITm6WlP3giJGisKHD2QDoV7RJpljTSV0n4sFZw7XzBGTHhd6g0FQ4G0IFKA1WURN
xwIDAQAB
-----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 279494500213749212544306880426725913563605
 . . . . . . . . [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 2022-06-08 07:41:19 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2022-09-06 07:41:18 +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 'chat.astro.rug.nl'
 . . . . . . . . [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 (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 23665119968837151174037660762298889135015693161983128152498571988563279609613463672289356377202616336702229593803755461448827799966362660147929052266451581099978601297133818119048061822553036584775408708118885050318821189704605904001135721422734717800945527177763843720442626072405929426591597755654159171214995037076257298036779832635161992481568519785861071980921067385757394518837296057598285608665008332080415783073350361958745974637304830245518737323058062830809644543531890307013438135596376587335570443130245053893668692040561252313199382321138417299418504844184661556954382386442403954708286882231031645359559
 . . . . . . . . . . . . . . . . . . . . [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)
							8458ee9adacc19383df433d60085c51d0638ba59
 . . . . . . . . . . . . . . . . [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 (21 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'chat.astro.rug.nl'
 . . . . . . . . . . . . . . . . [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 (69 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 1.3.6.1.4.1.44947.1.1.1
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.2.1 (cps)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:22|false] IA5String 'http://cps.letsencrypt.org'
 . . . . . . . . . . . . . . . . [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)
							00f10077002979bef09e393921f056739f63a577e5be577d9c600af8f94d5d265c255dc784000001814279ac2b0000040300483046022100bb652a532b98032f37e1279ae7835c66832b247ce91cf6989cb98beb4f8a4c97022100c1a11baf3de37e3f1677716fba8a77388eec424e9e2c0db150b04f2e02d9e2b8007600dfa55eab68824f1f6cadeeb85f4e3e5aeacda212a46a5e8e3b12c020445c2a73000001814279ae2c000004030047304502210081d9fd8ab0e8ec4d351165bf6f066755298f46bfab27bc703160d04fad8c7f6f02202881f7ce8fc199b955b5e45b1b6dfe6e8fb5c217e997abd5167f730c189ff3bb
 . . . . [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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