www.contrera.com
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:81:4f:8a:89:8b:c5:8c:c2:92:37:49:70:2e:0a:fe:56:c7 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): 03:81:4f:8a:89:8b:c5:8c:c2:92:37:49:70:2e:0a:fe:56:c7Serial Number (int): 305339011466479256891966609015612148438727
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: a2:7d:be:91:d3:88:bc:57:10:bb:31:43:83:dc:a4:22:dd:2d:a3:05
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): ae:58:0c:d3:7e:19:9d:11:12:d7:86:d8:a8:ec:2f:2f:fc:53:22:33
Fingerprint (sha256): 97:4f:42:f0:7d:d1:04:09:b8:b7:fc:5a:06:0d:bb:d4:1b:aa:25:ba:cf:6d:b1:c8:bc:00:9a:23:6e:28:dc:e0
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----- MIIGWTCCBUGgAwIBAgISA4FPiomLxYzCkjdJcC4K/lbHMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA5MjgxODU2MjhaFw0x OTEyMjcxODU2MjhaMBsxGTAXBgNVBAMTEHd3dy5jb250cmVyYS5jb20wggIiMA0G CSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQCqo7009KK4kI/3caOHBxZc3Aw+yWA4 RdvSaJnwTTX2Y026CEYv577y2zuAA2orbZtj6s33bFoku29xGn3V2vnZ1hnD01X0 j9U9kLMwz71qgHon0K/1EYDygo3ez7mlMGZc8pCBVmPB8NonitZsWpT3NhfsZckT hOkP+2vub2nfuy5iT4rYJWxIVa485FZazWZtGosj7sLhthImlGVm1l+OMhvz83Nv jw/osG+98w29se23CYm7IVngNbuOH0RcuTjEtZyBI8uVvlulh/gmg7p+6Aii0KU9 PC2EVFrZbQsI30WcQUIlRoQrW8AIxC6QzuCgiLlqlrmggtfMvg323is8kPzD1PBw qeHBUDrLp8bESZywT3yVp3ue7fN8eKq2qDKnils+0K6cHTHQ0Hcs1ISyILgjVRZj S8oPj3L6qi/e/F2dvV+n8vvHfRqGV5DaSIfMGvRVf2AtS/EQaOlvdgfnpEmRfoNP zvOFjG2IYsDvBB3gcGE5jTD+7+eu87iHDUgF/keSA4jSgztyZG3r+7Yw6G0ShyQO j8AWYoQ13u42cK1FB6IZZjUPoQxUQXD1B1kp4SxAH84czo+lKlbeNvo6ha+49jK6 AflL7kUVV5H4MFBT+U171592N/bS0KFCDR0AOlRAyNZbYAPvxypn9a1q4x4BwOyT hAAH82eUyjb5KQIDAQABo4ICZjCCAmIwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQW MBQGCCsGAQUFBwMBBggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBSi fb6R04i8VxC7MUOD3KQi3S2jBTAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv 86jsoTBvBggrBgEFBQcBAQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmlu dC14My5sZXRzZW5jcnlwdC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0Lmlu dC14My5sZXRzZW5jcnlwdC5vcmcvMBsGA1UdEQQUMBKCEHd3dy5jb250cmVyYS5j b20wTAYDVR0gBEUwQzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEF BQcCARYaaHR0cDovL2Nwcy5sZXRzZW5jcnlwdC5vcmcwggEFBgorBgEEAdZ5AgQC BIH2BIHzAPEAdwB0ftqDMa0zEJEhnM4lT0Jwwr/9XkIgCMY3NXnmEHvMVgAAAW15 ci0UAAAEAwBIMEYCIQDrEuxlNTmJzDOgI8gaAYMtiXS0Gz3AmEhgzK2AvhpfrAIh AIRSHxc3SVAH5JVGBpHy7E6jkzdF7hIxRLhamtcxSMUsAHYAKTxRllTIOWW6qlD8 WAfUt2+/WHopctykwwz05UVH9HgAAAFteXItAAAABAMARzBFAiBQH9hKkaCilSiz 1wgB7juvUvOV1E+SgNDy+JBlkZy4twIhAPx/Zl9i+azyUiOT9XcOYucWLtOvdoCv QfdJxabgYEvyMA0GCSqGSIb3DQEBCwUAA4IBAQCZQDdIf1ZH6mHKPO2TkUAdmeNv caiPDSbN7Ow8gwrveQqOqXNSmbQQyYU7G2y/Qt3Dhf5+sUobRanjHUtscizp825G XyOMZ/SwahCXJRqUBgwL4UOtfCJ0Y7YLJyQnx6hW1ruFO/G0d4qTr4In5LQ+HUmA ojuoUClAMOvrQBJF+Zk2MG0J1R/ZMz0qgU//n7jS7gvj8/Oar+kgQMWemHE8nmKP siVX0YniSN3gafI4n6fH2LIrpiGSuFhyBjv+gkRdvAHq/DaumurynE0CetbQLJ/Y nbNwKpzaMYlU4X9PtBiEnGzJmDLac4a/r+n6tZTAa2bU3b4Ox279jrTp74fy -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAqqO9NPSiuJCP93GjhwcW XNwMPslgOEXb0miZ8E019mNNughGL+e+8ts7gANqK22bY+rN92xaJLtvcRp91dr5 2dYZw9NV9I/VPZCzMM+9aoB6J9Cv9RGA8oKN3s+5pTBmXPKQgVZjwfDaJ4rWbFqU 9zYX7GXJE4TpD/tr7m9p37suYk+K2CVsSFWuPORWWs1mbRqLI+7C4bYSJpRlZtZf jjIb8/Nzb48P6LBvvfMNvbHttwmJuyFZ4DW7jh9EXLk4xLWcgSPLlb5bpYf4JoO6 fugIotClPTwthFRa2W0LCN9FnEFCJUaEK1vACMQukM7goIi5apa5oILXzL4N9t4r PJD8w9TwcKnhwVA6y6fGxEmcsE98lad7nu3zfHiqtqgyp4pbPtCunB0x0NB3LNSE siC4I1UWY0vKD49y+qov3vxdnb1fp/L7x30ahleQ2kiHzBr0VX9gLUvxEGjpb3YH 56RJkX6DT87zhYxtiGLA7wQd4HBhOY0w/u/nrvO4hw1IBf5HkgOI0oM7cmRt6/u2 MOhtEockDo/AFmKENd7uNnCtRQeiGWY1D6EMVEFw9QdZKeEsQB/OHM6PpSpW3jb6 OoWvuPYyugH5S+5FFVeR+DBQU/lNe9efdjf20tChQg0dADpUQMjWW2AD78cqZ/Wt auMeAcDsk4QAB/NnlMo2+SkCAwEAAQ== -----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 305339011466479256891966609015612148438727 . . . . . . . . [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 2019-09-28 18:56:28 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-12-27 18:56:28 +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 696148855642791301461883986177955240808143170515986152155195072446827059885184488361756567594352396668513293185496096918281358610906257175820665526680549134980825548231127802740253339560371800906211262132010860711848829930324403932229363078440502259683192270820695461984860161202209315773189013703452701906670576249222338891186841399838070729074199135793233733511809099025282759414352294323945457899898949989292144946898511128225754040669645594166588073298683191843949043615337164689834654278906772701219785411786284653453077015980966193585675693685815145336943523155158748997367679616423353041355842629153444363285794162237763178203070572046978246769580387621533494007791215821366508877574035450110682552511154156180639340206683027156680196670646977222116116328241139298591468089329618809066341371653906367440164856063880351392522284845322389713783650085757913754967882896200336558965568462012877482247068097166582252554567859530313213976220941460891015652120581670697470580380881774113407537161708357899362057275152190465129445521560479759239078720326545905072058027700134266258881686982190971524924094786579588163587088884553332575358077801657650403424697687027271945840230118805315242103317128273472277935007997135536397789624617 . . . . . . . . . . . . . . . . . . . . [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) a27dbe91d388bc5710bb314383dca422dd2da305 . . . . . . . . . . . . . . . . [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 (246 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes) 00f1007700747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016d79722d140000040300483046022100eb12ec65353989cc33a023c81a01832d8974b41b3dc0984860ccad80be1a5fac02210084521f1737495007e495460691f2ec4ea3933745ee123144b85a9ad73148c52c007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016d79722d0000000403004730450220501fd84a91a0a29528b3d70801ee3baf52f395d44f9280d0f2f89065919cb8b7022100fc7f665f62f9acf2522393f5770e62e7162ed3af7680af41f749c5a6e0604bf2 . . . . [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) 00994037487f5647ea61ca3ced9391401d99e36f71a88f0d26cdecec3c830aef790a8ea9735299b410c9853b1b6cbf42ddc385fe7eb14a1b45a9e31d4b6c722ce9f36e465f238c67f4b06a1097251a94060c0be143ad7c227463b60b272427c7a856d6bb853bf1b4778a93af8227e4b43e1d4980a23ba850294030ebeb401245f99936306d09d51fd9333d2a814fff9fb8d2ee0be3f3f39aafe92040c59e98713c9e628fb22557d189e248dde069f2389fa7c7d8b22ba62192b85872063bfe82445dbc01eafc36ae9aeaf29c4d027ad6d02c9fd89db3702a9cda318954e17f4fb418849c6cc99832da7386bfafe9fab594c06b66d4ddbe0ec76efd8eb4e9ef87f2