www.contrera.com
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 04:b8:37:d7:d6:bc:91:ab:2a:6d:6a:34:ea:09:97:68:f7:c2 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=www.contrera.com
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:b8:37:d7:d6:bc:91:ab:2a:6d:6a:34:ea:09:97:68:f7:c2Serial Number (int): 411135327479462051211942524935007371851714
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: f5:00:33:e7:50:73:e2:94:46:41:66:b9:0f:cc:d7:43:77:68:eb:63
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): f4:81:0e:f7:be:c9:2f:6a:b2:5d:4a:80:fb:8c:15:d8:45:59:60:b6
Fingerprint (sha256): a0:7d:05:bf:5c:a5:51:b2:77:6c:d8:63:04:1b:72:75:6d:cb:a5:85:fa:40:c5:b3:6a:7f:92:7a:09:3c:5b:7b
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate www.contrera.com
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for www.contrera.com
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
www.contrera.com
Other certificates including the domain name contrera.com
(limited to 100 certificates)
Certificate
The complete raw certificate details for www.contrera.com in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGWDCCBUCgAwIBAgISBLg319a8kasqbWo06gmXaPfCMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTEyMDQwNTA3MTVaFw0y MDAzMDMwNTA3MTVaMBsxGTAXBgNVBAMTEHd3dy5jb250cmVyYS5jb20wggIiMA0G CSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQC5clczohY5bncUWY3wwQD68rIBcwFg o6wSiGXmbYgCitq0+dKuPQFuyglBoOlKetymhVR/HObJz8wniTRxC4yIz5z4ecea aVgYgqZbuK6M/ZG/b3WU3ICyW0V1Eocx2d3qTWcxYu4D88UAf1+6uo2Y8uavw75Z nVSp2D6LvwAtdNWexO0SlBXdSBzrYpp41Mysov8A0fZwF1tD/DFPFAA30U8eXUEm QC2XcadnNeApf4Cp6EhH7QqGQXUzYtXo7T6k60c9qOL0ZUDg5fTa93oSa2/LVw+V cL0xx5hj9N6A1xxJT+EuLjFQmnqYmTMc9udZeat3902spZaZSlcrDgF2s+PBud6i rdSXWu/TX5QB6fAfIUZlnbR9alxc48GXsp5qDcze47DCeOuo3C5HqXpaarTHYcIT Ko7P1J7aWC3lU/PAodt9+Aw6TMlHgj/Hl0aPa4IvE0u2NWkAwgQyP6Bi7AL72IrB YgLAw4lVnHEpm7YMSjPaojrQZ3PUgd00lKqnaWiZBg7mgsTUYHTxILkI1hhD8bVm 0JMk6paey6jvaFyR4t5zyGVvZ/mtUMMbNQ4tQJrDz0abMqOneJOVYrdRqZWwHp8S pabLkLq3mC9jyBMI0t9MxBlk6XDw8gP1No2JKCJp6769FG59ki39Uk0hq/01tSoy 6p+dWfx3YUK+hwIDAQABo4ICZTCCAmEwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQW MBQGCCsGAQUFBwMBBggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBT1 ADPnUHPilEZBZrkPzNdDd2jrYzAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv 86jsoTBvBggrBgEFBQcBAQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmlu dC14My5sZXRzZW5jcnlwdC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0Lmlu dC14My5sZXRzZW5jcnlwdC5vcmcvMBsGA1UdEQQUMBKCEHd3dy5jb250cmVyYS5j b20wTAYDVR0gBEUwQzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEF BQcCARYaaHR0cDovL2Nwcy5sZXRzZW5jcnlwdC5vcmcwggEEBgorBgEEAdZ5AgQC BIH1BIHyAPAAdwBep3P531bA57U2SH3QSeAyepGaDIShEhKEGHWWgXFFWAAAAW7P hRT9AAAEAwBIMEYCIQDnWkJQcw4UTguuNfC941/PuLtIlYf0byw++oBkSxU7BwIh AKSwx89FXqh9acV+I7qpEuaTPUKTyUr13YZF3sMGEC5GAHUAB7dcG+V9aP/xsMYd IxXHuuZXfFeUt2ruvGE6GmnTohwAAAFuz4UVIAAABAMARjBEAiAdiU5NqRZmEYNm +I7e/mdyXMun+npaOd1mjXmKX0B4rgIgRNt2P3pjEWXxsZTLt9vhG9K6NN2tJ8+W hg7OH+3yC9IwDQYJKoZIhvcNAQELBQADggEBABWpu4VXkNOphJmsAGaevjbeajqj XtB/vrLzQvqfz+RH+eikCGl4cIgnxhmcDYjBn853/F/WJ8rLWUIh02Cn48lNWMRw M7C8OBE9I21jBrOfiVuAlD/+698gg6yLT19695tftmucrJIS0jKgsGQhxrp8bbhS qjWB/PaQyiUzoINzKxbDHQ4mSzlM5s8uaBHz5uKSw/MWSe6or+JO5k43+h22FAg3 rh/Vhtdm/yzC+WlMbr45nbi2Z/D0vnGhs5x8SGxH+Cjx5UiAwc6qym/2+mLS8DoT yNwE30/9jka3l1L/wHrytrVgj0whsIKEu+W+AwC0qqCZ1spF5Bp/vSvvD4A= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAuXJXM6IWOW53FFmN8MEA +vKyAXMBYKOsEohl5m2IAoratPnSrj0BbsoJQaDpSnrcpoVUfxzmyc/MJ4k0cQuM iM+c+HnHmmlYGIKmW7iujP2Rv291lNyAsltFdRKHMdnd6k1nMWLuA/PFAH9furqN mPLmr8O+WZ1Uqdg+i78ALXTVnsTtEpQV3Ugc62KaeNTMrKL/ANH2cBdbQ/wxTxQA N9FPHl1BJkAtl3GnZzXgKX+AqehIR+0KhkF1M2LV6O0+pOtHPaji9GVA4OX02vd6 Emtvy1cPlXC9MceYY/TegNccSU/hLi4xUJp6mJkzHPbnWXmrd/dNrKWWmUpXKw4B drPjwbneoq3Ul1rv01+UAenwHyFGZZ20fWpcXOPBl7Keag3M3uOwwnjrqNwuR6l6 Wmq0x2HCEyqOz9Se2lgt5VPzwKHbffgMOkzJR4I/x5dGj2uCLxNLtjVpAMIEMj+g YuwC+9iKwWICwMOJVZxxKZu2DEoz2qI60Gdz1IHdNJSqp2lomQYO5oLE1GB08SC5 CNYYQ/G1ZtCTJOqWnsuo72hckeLec8hlb2f5rVDDGzUOLUCaw89GmzKjp3iTlWK3 UamVsB6fEqWmy5C6t5gvY8gTCNLfTMQZZOlw8PID9TaNiSgiaeu+vRRufZIt/VJN Iav9NbUqMuqfnVn8d2FCvocCAwEAAQ== -----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 411135327479462051211942524935007371851714 . . . . . . . . [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 2019-12-04 05:07:15 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-03 05:07:15 +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 'www.contrera.com' . . . . . . . . [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 756556297425437700043439818577155070809456589825078524872883498291215255055985604468330551857626306458918909825911984588307739493140324412046579894078106001377507516869467400207580178913254587910086781092993230157564184960776936720271571020200651806749550273767141383382862902248790095023974802431531515692041916362616794675252918034870724663321392857370638684728465558986798302251144622716503951900731382070269726694534177884034216511742359363866880294452556718368997021793768225018089440011109909322141914903845494746188887393959898141899391426710473453168762989726492694147934928562039658586354554984959821294495848899655177192121405450762093875340758837736271644700437316330196093728654801340088884799818860372556778167193775492487931968001970133605629022771987233842236309603174840167436485719979706223460978124406533549753986027186930284061452661642263677079860473122515242194349254235635814474835707217753601464520527171341333131526000733179020260699610054582467459479348294077725789722747623746212500168687113748686489793620648479725481136599654130909313524446631892626139576054084984629731085408632128282668026241154193090105565013717282701723448893296589782825682546410838669745086589656664700371156852615516928030216994439 . . . . . . . . . . . . . . . . . . . . [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) f50033e75073e294464166b90fccd7437768eb63 . . . . . . . . . . . . . . . . [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 'www.contrera.com' . . . . . . . . . . . . . . . . [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 (245 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes) 00f00077005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000016ecf8514fd0000040300483046022100e75a4250730e144e0bae35f0bde35fcfb8bb489587f46f2c3efa80644b153b07022100a4b0c7cf455ea87d69c57e23baa912e6933d4293c94af5dd8645dec306102e4600750007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016ecf851520000004030046304402201d894e4da91666118366f88edefe67725ccba7fa7a5a39dd668d798a5f4078ae022044db763f7a631165f1b194cbb7dbe11bd2ba34ddad27cf96860ece1fedf20bd2 . . . . [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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