ctf.uwaterloo.ca

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:68:0a:b5:5b:fd:a1:6f:d6:64:ac:d2:e0:eb:f7:5a:ed:f9 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=ctf.uwaterloo.ca

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:68:0a:b5:5b:fd:a1:6f:d6:64:ac:d2:e0:eb:f7:5a:ed:f9
Serial Number (int): 296740457906541545440794114545908576873977
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: c3:d8:73:b9:a2:df:97:ab:d6:61:71:fb:df:9e:eb:b9:b7:41:8e:9f
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 4a:b2:61:3f:b5:48:54:ce:db:2c:42:59:97:1b:da:0b:11:58:2f:3e
Fingerprint (sha256): 02:dc:a7:eb:4a:bf:0c:50:93:e1:10:cb:27:e5:9e:8d:a9:57:9d:4e:8b:04:b4:b1:58:17:54:98:85:b9:67:6f

Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/

Revocation information

OCSP Server: http://ocsp.int-x3.letsencrypt.org

Check the revocation status for certificate ctf.uwaterloo.ca

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for ctf.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

ctf.uwaterloo.ca

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Certificate

The complete raw certificate details for ctf.uwaterloo.ca in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIGWTCCBUGgAwIBAgISA2gKtVv9oW/WZKzS4Ov3Wu35MA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA5MjIwNTQ3MDRaFw0x
OTEyMjEwNTQ3MDRaMBsxGTAXBgNVBAMTEGN0Zi51d2F0ZXJsb28uY2EwggIiMA0G
CSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQC87wm9yAkBu6tvomrV5V5CrVPIivnv
0brCXVlpdunubgTnoAXOYjd/rBT8O0ASyY4Ud1Nt1Xp7lJesso6Ni9R5uGclyDS8
vviq9rO2wGL7c1viwW81/a65qTSzJhLL9+IGQVH6KBDX5ke/Qz1LCGNb41Zu3ckS
YWWUABgsKCGxkfUccqHAntRdSMYcfHV5viYwMRUMnhEDJ6aMyus8af0YRMDxqWEz
8JBVVn8vHRIPq4udV9UAaPmI1cCtyVBaqQwZOuC8t4DGE3AzAt4hgG8tgTWlsl4J
lMQH5E0taVCowtvGZ/WRKcHctE3FurPehE5+Qpl05UeXLVQzBB8g5LCtLz0Lwpa0
fE3D+rczOa+AFdIvKRfrcB7iWZVWYhty6FL5XbdrGtWvBHz9/XhMn2Po7omNN/qQ
6Gt0cZSOuCVRuE+3K5dOcfeirbXnKZb4FIi7dXCUibawqUdHPOYgqzDi/eSoR60L
FbxGNiud8125/58LE74f8B3dvN5sOtpmr+O2vnt+7mofDKbX1sU0VEGMYiYwUYYB
6CG1MM4TB3R9PyKVzgBXuLSN2adajRet7gRJcs+5qP2DPZk4A+AOCH6UB5k6SOkL
7EF8ALWK3wuW996m15mlUdPw/zo9bi/hoU2OIHIJBnlwjdEjlvxgMNjOAPkuw0Qh
TWirEaCnh5ytUwIDAQABo4ICZjCCAmIwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQW
MBQGCCsGAQUFBwMBBggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBTD
2HO5ot+Xq9Zhcfvfnuu5t0GOnzAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv
86jsoTBvBggrBgEFBQcBAQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmlu
dC14My5sZXRzZW5jcnlwdC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0Lmlu
dC14My5sZXRzZW5jcnlwdC5vcmcvMBsGA1UdEQQUMBKCEGN0Zi51d2F0ZXJsb28u
Y2EwTAYDVR0gBEUwQzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEF
BQcCARYaaHR0cDovL2Nwcy5sZXRzZW5jcnlwdC5vcmcwggEFBgorBgEEAdZ5AgQC
BIH2BIHzAPEAdwB0ftqDMa0zEJEhnM4lT0Jwwr/9XkIgCMY3NXnmEHvMVgAAAW1X
uUq2AAAEAwBIMEYCIQCV0fHIq3zbJIkJ9xMAxPCg8izBPCuGtIRC4JpfwonxrQIh
AIlWrIJOkV8wR8UfAmLntd6zieE8IVKtxiAumQ4ZJ24XAHYAY/Lbzeg7zCzPC3KE
J1drM6SNYXePvXWmOLHHaFRL2I0AAAFtV7lKxQAABAMARzBFAiA0BSUghjPuWrdj
ESVnkR4gAvACq9ezHoMG/x+Q5rzhZAIhAIxLsrGhI594guJSo9T0r6G1r3XVO5Uq
oNruEmL/Lbw7MA0GCSqGSIb3DQEBCwUAA4IBAQAg8tB0KYlrDkJ7JU2F+8sL9kcO
DtBgLlwEhWkkSuysoUNxRIUBxnCf3WMGD6FNVaDC+txTwLO+BTP1zuNuxOj0GQDl
7epWNWolI5repnm+XGnxcH8uYzjEoujTjq/TM3Sw7FjurggpQdXwuHu9eZWb9Bnt
VqAAGT796oA8lENQZltjwtoGlqy1Urx+x1mhTc+fu7/P75H20gzCCyPDTG0LzppJ
jKhQwkT/eyiM4RXnVsxku7wMiTlmbbn3PuuEXRaTWtxKJvmH2FbhOtFPMNadUSRb
pUX4MixigXOUKW2M8ip+IszCddV5uqHitOStWZDcW8hcamu5dObWSSZu+rIE
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----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-----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 296740457906541545440794114545908576873977
 . . . . . . . . [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 'Let's Encrypt Authority X3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-09-22 05:47:04 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-12-21 05:47:04 +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 'ctf.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 770782421394097249754405355349938273394597376889363071320289098284682631521749675774525310934568962225765564448789563011189177035449245777540411540865766073185385462702622298220133888119605953687129719369509220629240553615971810442741887606132016649387527996989324572321769907654188371595066599112359221625517137981179834686554100789661854606598410805588424986673550762583194376453947390508678183936095711706978061645515044774172640969211365298840362584976206324259230774136095242667245358847162709014787930200419956470181923828107603736775215237895359487556175195565315789064933305144472003193380884226040007728577309383634603781493933846505599293946189455689059945696246592537659686596632032226316820996122754663977666294026390280109080669597678088906541496392410873228703164603394256774818807001919368164790562681599697923233559734790807128441141925382497186260712336132364345051712737484971622537824858074467353044873290151585277471004017209891140247435822071081985703764238663371682365210178140382699750655358424881773449773370998006490286579191493440776519861250755866514263018342888494115404925289649816824157877175856825208706993512076672593902442099028589948108909122067967394814526694784008780333526199178243209118053346643
 . . . . . . . . . . . . . . . . . . . . [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)
							c3d873b9a2df97abd66171fbdf9eebb9b7418e9f
 . . . . . . . . . . . . . . . . [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 a84a6a63047dddbae6d139b7a64565eff3a8eca1
 . . . . . . . . . . . . . . . . [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 (99 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.int-x3.letsencrypt.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://cert.int-x3.letsencrypt.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 (20 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ctf.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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007700747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016d57b94ab6000004030048304602210095d1f1c8ab7cdb248909f71300c4f0a0f22cc13c2b86b48442e09a5fc289f1ad0221008956ac824e915f3047c51f0262e7b5deb389e13c2152adc6202e990e19276e1700760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016d57b94ac500000403004730450220340525208633ee5ab763112567911e2002f002abd7b31e8306ff1f90e6bce1640221008c4bb2b1a1239f7882e252a3d4f4afa1b5af75d53b952aa0daee1262ff2dbc3b
 . . . . [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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