tsukuba.io

Issued by GTS CA 1P5

About this certificate

This digital certificate with serial number c4:c1:11:a8:87:22:f0:69:11:8e:16:e4:34:44:d0:ee was issued on by Google Trust Services LLC.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. This certificate is currently not expired, we haven't checked the revocation status of this certificate but you can do this simply on revocationcheck.com. 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=tsukuba.io

Google Trust Services LLC

Organization: Google Trust Services LLC
Country: US

This certificate will expire on

Certificate Details

Serial Number (hex): c4:c1:11:a8:87:22:f0:69:11:8e:16:e4:34:44:d0:ee
Serial Number (int): 261531158620658012406135964264005161198
Serial Number lenght: 128 bits, 16 octets

SubjectKeyId: 18:56:e9:89:5e:29:18:3d:4f:14:c9:b5:87:90:89:9f:8d:c8:d2:6a
AuthorityKeyId: d5:fc:9e:0d:df:1e:ca:dd:08:97:97:6e:2b:c5:5f:c5:2b:f5:ec:b8

Fingerprint (sha1): 52:e4:4a:c6:0a:c5:e7:76:bb:0f:4d:cd:94:5d:31:5e:61:de:3f:01
Fingerprint (sha256): d8:fa:d5:d6:8a:d3:ee:28:70:5a:af:0f:0f:57:61:8f:35:17:11:54:0e:de:ea:76:8e:d0:e2:94:91:b4:d1:63

Issuing Certificate URL: http://pki.goog/repo/certs/gts1p5.der

Revocation information

OCSP Server: http://ocsp.pki.goog/s/gts1p5/zGSG4xdtrMI
CRL Distribution Point: http://crls.pki.goog/gts1p5/aLim8fPah-Q.crl

Check the revocation status for certificate tsukuba.io

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for tsukuba.io

Public Key Algorithm

RSA

Key Size

2048

Signature Algorithm

SHA256 with RSA

Key Usage

Digital Signature
Key Encipherment

Extended Key Usages

Server Authentication

Extensions

10 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

tsukuba.io
*.tsukuba.io

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cal.tsukuba.io

Certificate

The complete raw certificate details for tsukuba.io in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqdEuL9bhDd12XNdRC/iC
750wulFGUYNpZypoCO0xbIgLFdybP4+bicCY/rFyYI1PaHryvU0PPex8yG8VeX09
Cn5Q0SbQX/s0abxyfZuikWIokNSyXCKTlp9r0TNmwYpHS9SK8JERv078lzff/PRH
qCLSHxtCwQXxJxpAeFEGPbtEEhgoZhHFxg9UhxChqwHa2ufYfKiNPFhIaEjBYNnr
yEkHPN79jSEDT0zKqK8sJhaL4wP7Qknrq0BRrAYaOsBfXA6Qo7gZDnEb2SWoigZW
Ba2DhLJ4y+VctHAsNUJwUP3Gqtt2fogdAQjjHTGy9hV4iCdF0RzRh7Kurvae1gF2
uQIDAQAB
-----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 261531158620658012406135964264005161198
 . . . . . . . . [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 'Google Trust Services LLC'
 . . . . . . . . . . . . [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 'GTS CA 1P5'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-05-06 14:14:53 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-08-04 14:14:52 +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 'tsukuba.io'
 . . . . . . . . [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 21437424247598345967433637293422383762933435945854876960063815199377794316216856263123079921560638682734982173962392999592664517441481211255102789078632728060964684477666209505149504067067978393266200876144312253929595111482169708498117203935706112825432966531324598154353342539792048720770399551006678751452833366264763666935906911783439599475792719209452090286308404464031121835395471056307769096340105469253698607129018955497451667523459040513816127230181721104460001253917304011506724401465021103413046240517255885969236340266654439679540437361480634191470236077317452920877536604691981090835875746194948614092473
 . . . . . . . . . . . . . . . . . . . . [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 (12 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: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)
							1856e9895e29183d4f14c9b58790899f8dc8d26a
 . . . . . . . . . . . . . . . . [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 d5fc9e0ddf1ecadd0897976e2bc55fc52bf5ecb8
 . . . . . . . . . . . . . . . . [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 (108 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://ocsp.pki.goog/s/gts1p5/zGSG4xdtrMI'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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://pki.goog/repo/certs/gts1p5.der'
 . . . . . . . . . . . . . . . . [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 (28 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'tsukuba.io'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.tsukuba.io'
 . . . . . . . . . . . . . . . . [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 (26 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 1.3.6.1.4.1.11129.2.5.3
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.31 (cRLDistributionPoints)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (53 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://crls.pki.goog/gts1p5/aLim8fPah-Q.crl'
 . . . . . . . . . . . . . . . . [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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007500eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018f4e78dab300000403004630440220569a8698afd03fc452b2c64a3ea668f84e6ff1bb74837fd24c23ab3d41ab69a0022037706226ad020713f7249172a832115ffab56ec6d181b7c4b07e49f49f6b21960076003f174b4fd7224758941d651c84be0d12ed90377f1f856aebc1bf2885ecf8646e0000018f4e78dac600000403004730450220482bb51976960e3314addd00f796566991894edc42897441cad65a2580dcbf3e022100f9c66eaa03f3a6d9b7bfde68b92c2617c07982290ed1fb5a137abe56d967d327
 . . . . [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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