koios.cs.uwaterloo.ca
Issued by R3
About this certificate
This digital certificate with serial number 04:a1:c1:72:96:dc:7b:b0:e1:15:6c:34:1e:dc:d0:32:96:6e was issued on by Let's Encrypt.
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We have idenified some issues with this certificate:
- Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)
Certificate Subject
CN=koios.cs.uwaterloo.ca
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:a1:c1:72:96:dc:7b:b0:e1:15:6c:34:1e:dc:d0:32:96:6eSerial Number (int): 403491740786170357728887629688722919954030
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: 85:64:ab:b6:7e:6f:9b:9e:ef:da:45:cd:3c:3e:d1:23:35:fd:07:9f
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): 57:5f:0f:93:dd:63:09:5a:57:3d:e0:42:f0:cf:79:7b:50:1e:cf:65
Fingerprint (sha256): 01:4c:cf:2f:1e:6c:a6:74:08:15:f8:de:4b:4c:24:03:55:6b:45:a1:e9:a4:69:69:a6:16:3c:8d:96:c6:cb:69
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.orgCheck the revocation status for certificate koios.cs.uwaterloo.ca
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for koios.cs.uwaterloo.ca
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
koios.cs.uwaterloo.ca
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Certificate
The complete raw certificate details for koios.cs.uwaterloo.ca in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGLzCCBRegAwIBAgISBKHBcpbce7DhFWw0HtzQMpZuMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yMTA2MjQxNTQ3MDZaFw0yMTA5MjIxNTQ3MDVaMCAxHjAcBgNVBAMT FWtvaW9zLmNzLnV3YXRlcmxvby5jYTCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCC AgoCggIBAK8bB0NOwbGUil/12707tJ2wuHtkNV7bufwyEUzumrIA0+A7AsUulDw1 xVO0Svli8TC/SsV1+JgJNaxjFv4+Syvr9ptoO5ThCW3ymK9jlHie1QK8btkSVU+A jQNpsydfEyc3hRgX8e0YCAID/8Gef1UinqQkK7AMGhAWfkxls+/nbkjP+Jnusz+c BZoETibrjxDtGxTYOJSicjMI4foyYW4WeyxcpdR9NB5/brmKBWaWtLB3tDYO+McD s08k+vj6geQQpcU+Oom55+/JZ3nLRudFKIUUylC/JUQv20ihbtuh5B+F+lXrsw7G coC+rqp8O4RWnuXTmMEfj5zSgvI9f+MhS2j705Ke79c5WRklrS6vVpp/QZUXEWOe 2ansOvDz0P3IcBCEWFgk72amTbdJpDage9Kd3wQzwzB731e2xmR3HTLyk+eF3wf9 kQqvquZwn1G7SVMk5QUjhfWH39SaN3z367hnw9f3mTzzqabgc7iHsdNMLqMqPyYD zHAv7RdY6idasj7i28ieo0y7Rv/0rd4IXt7ZAbtqOUujCs1mGgrfNA74Aykst5LY KWgWnIvvursiEvEfoSZMh0oC/yWsGSC43sjL2CJ/onmXit13NQ1YWDmYBlmVpWRS f2YYCMb+6sef3ek2o/r2Sh3zGNJZzGf7OJyKS25jHmFtiwQt0PDhAgMBAAGjggJP MIICSzAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUF BwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFIVkq7Z+b5ue79pFzTw+0SM1/Qef MB8GA1UdIwQYMBaAFBQusxe3WFbLrlAJQOYfr52LFMLGMFUGCCsGAQUFBwEBBEkw RzAhBggrBgEFBQcwAYYVaHR0cDovL3IzLm8ubGVuY3Iub3JnMCIGCCsGAQUFBzAC hhZodHRwOi8vcjMuaS5sZW5jci5vcmcvMCAGA1UdEQQZMBeCFWtvaW9zLmNzLnV3 YXRlcmxvby5jYTBMBgNVHSAERTBDMAgGBmeBDAECATA3BgsrBgEEAYLfEwEBATAo MCYGCCsGAQUFBwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCCAQMGCisG AQQB1nkCBAIEgfQEgfEA7wB1AJQgvB6O1Y1siHMfgosiLA3R2k1ebE+UPWHbTi9Y TaLCAAABej7q/2cAAAQDAEYwRAIgdAiJmXiR6ZibKljM7IuiOlOGsqsTisf1GF+V bjd1Z6YCIHGQt3eT5pEEGP9wYIj94rdIkQJrHzmrAze2hy2FHDXEAHYA9lyUL9F3 MCIUVBgIMJRWjuNNExkzv98MLyALzE7xZOMAAAF6Pur/WAAABAMARzBFAiBP9MnF XbuKL7qbbTBmRw3ySSAcVrSnJEHHiUXYryT+bAIhAKATcpAFsbA7IF/FSjsexruO h2Vw/cNg2XZa6yAGHTU+MA0GCSqGSIb3DQEBCwUAA4IBAQCvcwy7l3pmz/D3V97N AMQDMm0k42wd2HjJpIDJKPiH6btayB4xjPWq37cerhtf0xD9fb0tC6pSBEIhQZIm z02C5PSxGR3A7Ar4xiHYcMe1OAyOPSOQJhed1pci7izlVrNncQxH1pCpMOxpZHbA hqkUyI3xw8oR0pl+MI33f5JXk/kRZLDgXtiRBSdEz1mzGFndocphLOZLVxGE6zbA U11p/lL7WVPxsTN3QmWWQrhR6FIPqt8F1mbXPvS3hr9bK2LhiA+Ykphx6drGh5ab eSCMtZe6H/6XDfb4irnoohjRfsF1Yuhi2du8qbeD7eVtIAAkCv2zmGlMS/j8/aqO 8PzK -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEArxsHQ07BsZSKX/XbvTu0 nbC4e2Q1Xtu5/DIRTO6asgDT4DsCxS6UPDXFU7RK+WLxML9KxXX4mAk1rGMW/j5L K+v2m2g7lOEJbfKYr2OUeJ7VArxu2RJVT4CNA2mzJ18TJzeFGBfx7RgIAgP/wZ5/ VSKepCQrsAwaEBZ+TGWz7+duSM/4me6zP5wFmgROJuuPEO0bFNg4lKJyMwjh+jJh bhZ7LFyl1H00Hn9uuYoFZpa0sHe0Ng74xwOzTyT6+PqB5BClxT46ibnn78lnectG 50UohRTKUL8lRC/bSKFu26HkH4X6VeuzDsZygL6uqnw7hFae5dOYwR+PnNKC8j1/ 4yFLaPvTkp7v1zlZGSWtLq9Wmn9BlRcRY57Zqew68PPQ/chwEIRYWCTvZqZNt0mk NqB70p3fBDPDMHvfV7bGZHcdMvKT54XfB/2RCq+q5nCfUbtJUyTlBSOF9Yff1Jo3 fPfruGfD1/eZPPOppuBzuIex00wuoyo/JgPMcC/tF1jqJ1qyPuLbyJ6jTLtG//St 3ghe3tkBu2o5S6MKzWYaCt80DvgDKSy3ktgpaBaci++6uyIS8R+hJkyHSgL/JawZ ILjeyMvYIn+ieZeK3Xc1DVhYOZgGWZWlZFJ/ZhgIxv7qx5/d6Taj+vZKHfMY0lnM Z/s4nIpLbmMeYW2LBC3Q8OECAwEAAQ== -----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 403491740786170357728887629688722919954030 . . . . . . . . [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 2021-06-24 15:47:06 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2021-09-22 15:47:05 +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 'koios.cs.uwaterloo.ca' . . . . . . . . [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 714368438983731728455494350493791999841658975552739100921237312861133740828955960025661673839236392187482948134056489083099562078866979460752797860217200776852845933530879824910527110848532821563629476301240910856920601700796304874726853005559144522183512712337847551718095266781176520410704005550289350596529465663077292429913952001031121687622541733242913528000621595149761234659882097341869764755286134795244201798231991707125689735442807702165621579933077802422488587092184868597768765380663820064709925204793857954747682938219918609430753379330868650717570327950484560011097561385920319699789917216179672740940543194988874532978901508215976379144091118013633833123258038007935886539818730403844189073464596837826140305469153131894123591502626774950720691309348850499649540803919692901514170288022683676418615294421002370190512831110090755842441498395119217745044562507472874913668138685516373259075908279461863972277521535773799213243767176765959452082476968387417837658676717507200071116300463463148103834237096700877005734896448126763156794170181200822106892559352353707777720062991996130785647376986172867546417319545948300972749566843814883001723924084255300655017744316659511607832281962243368269553784785048760022983569633 . . . . . . . . . . . . . . . . . . . . [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) 8564abb67e6f9b9eefda45cd3c3ed12335fd079f . . . . . . . . . . . . . . . . [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 (25 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'koios.cs.uwaterloo.ca' . . . . . . . . . . . . . . . . [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 (244 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes) 00ef0075009420bc1e8ed58d6c88731f828b222c0dd1da4d5e6c4f943d61db4e2f584da2c20000017a3eeaff6700000403004630440220740889997891e9989b2a58ccec8ba23a5386b2ab138ac7f5185f956e377567a602207190b77793e6910418ff706088fde2b74891026b1f39ab0337b6872d851c35c4007600f65c942fd1773022145418083094568ee34d131933bfdf0c2f200bcc4ef164e30000017a3eeaff58000004030047304502204ff4c9c55dbb8a2fba9b6d3066470df249201c56b4a72441c78945d8af24fe6c022100a013729005b1b03b205fc54a3b1ec6bb8e876570fdc360d9765aeb20061d353e . . . . [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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