blog.techlib.cz
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 04:f9:fc:25:70:ec:d1:0e:36:eb:6a:27:1e:14:a8:55:d7:19 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=blog.techlib.cz
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:f9:fc:25:70:ec:d1:0e:36:eb:6a:27:1e:14:a8:55:d7:19Serial Number (int): 433514612950668650091187921194384973223705
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: ad:2e:f4:c5:75:d4:cd:1c:91:b0:78:2b:ef:a1:dc:f8:37:11:03:94
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 88:76:8e:c7:1c:26:d8:41:82:8b:0c:99:f1:97:76:c8:f5:aa:e9:de
Fingerprint (sha256): 15:1d:06:d7:f4:73:59:26:7d:fb:f8:05:6e:4f:3f:06:80:47:54:de:64:4c:48:d0:2e:49:85:1d:bb:a3:03:f9
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate blog.techlib.cz
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for blog.techlib.cz
Public Key Algorithm
RSA
Key Size
2048
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
blog.techlib.cz
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Certificate
The complete raw certificate details for blog.techlib.cz in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFVzCCBD+gAwIBAgISBPn8JXDs0Q4262onHhSoVdcZMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDA0MDQyMTA0MzhaFw0y MDA3MDMyMTA0MzhaMBoxGDAWBgNVBAMTD2Jsb2cudGVjaGxpYi5jejCCASIwDQYJ KoZIhvcNAQEBBQADggEPADCCAQoCggEBALs9AJDSmKQA37Rv0UAu1iHjrcmHo0s+ pbsillW8DEh++0KDBxH4ZEWGmVrk0OlujSyOh8XmUHeqwy2poOb1VSpoAEFS9nn2 Xlyl8ffq2qmjbsWFLWCzXs4MdCJcg/lfujNKEFT+tsxzgxARQAbKlAFT75jFbH3a 7IcUemJwVwRDxYpCG+KOlA61bRl+YbR8ilPWGy9zouEjx7QSz8wr8jJMmnWVsGUZ koBS11WSzzGEjQY1Tx8ptS2h6+vdzsGXfWMPs5yHqq1lcg4Nfru7KMw5TO3M4mNs AL5mpO9AeVHm7/ilEd0SvTz1c5N1Qe5yyf5XiYwIHz9EP3If5kIFC60CAwEAAaOC AmUwggJhMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYB BQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUrS70xXXUzRyRsHgr76Hc+DcR A5QwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo7KEwbwYIKwYBBQUHAQEE YzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQteDMubGV0c2VuY3J5cHQu b3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMubGV0c2VuY3J5cHQu b3JnLzAaBgNVHREEEzARgg9ibG9nLnRlY2hsaWIuY3owTAYDVR0gBEUwQzAIBgZn gQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcCARYaaHR0cDovL2Nwcy5s ZXRzZW5jcnlwdC5vcmcwggEFBgorBgEEAdZ5AgQCBIH2BIHzAPEAdgBep3P531bA 57U2SH3QSeAyepGaDIShEhKEGHWWgXFFWAAAAXFHOXBOAAAEAwBHMEUCIQCX2AVr 0uh2Fgiv4XbOUQktEEq4Jmo94zFodGcYqp7EMQIgULzanwsJgq03icvVEO9EMhM4 lC609WhvxKkgf7SeOzcAdwCyHgXMi6LNiiBOh2b5K7mKJSBna9r6cOeySVMt74uQ XgAAAXFHOXA+AAAEAwBIMEYCIQDTBrb6wr6gJHrEfRbiIdDLyKxmEi7KokDi9T3D XW183QIhAM1wTxJ3A/Hg4F1peIX0XLU1FLUYJDFBhmi5/Jn47hmpMA0GCSqGSIb3 DQEBCwUAA4IBAQBwLq0bk8X92Qbt9uA7dtrmg1U2MspHSxi91+pd2oiHfe+2yPq5 /DSlOV1aNTMXWzK3Om0Lu8A+jF4LVtm+5iOGicXfzkK1LzgjxRkfYHfwk9eaqWO9 azZbVIGTLA87Eqif+/sj2xmzD6sAeMTVDO4T7p5qp1rzeF1sXfItrY2lfaRRl7v+ tE0629KOm+urAmxPpm4jlL34JKqVGL9xJINA09+1d7YD2s46QEHe5I69/6An83VS iENGnDK8j8S7qa4Y6LZrbDaPqdlyltgdNq+xrQp8B98srT+5aMOnUbW/31IODige wSjem/gWwPZ+HTNkwVFL5efztXW2fxGVQDZz -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuz0AkNKYpADftG/RQC7W IeOtyYejSz6luyKWVbwMSH77QoMHEfhkRYaZWuTQ6W6NLI6HxeZQd6rDLamg5vVV KmgAQVL2efZeXKXx9+raqaNuxYUtYLNezgx0IlyD+V+6M0oQVP62zHODEBFABsqU AVPvmMVsfdrshxR6YnBXBEPFikIb4o6UDrVtGX5htHyKU9YbL3Oi4SPHtBLPzCvy MkyadZWwZRmSgFLXVZLPMYSNBjVPHym1LaHr693OwZd9Yw+znIeqrWVyDg1+u7so zDlM7cziY2wAvmak70B5Uebv+KUR3RK9PPVzk3VB7nLJ/leJjAgfP0Q/ch/mQgUL rQIDAQAB -----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 433514612950668650091187921194384973223705 . . . . . . . . [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 2020-04-04 21:04:38 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-07-03 21:04:38 +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 'blog.techlib.cz' . . . . . . . . [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 23636644339460094513404634137721410971165664294057123498180519145534131135619691913222153870449110161832206797405293067355632986785672732500662596020398168480319795110338627874546500382986906381810909801850153405584259836386774119806056239382039696804942124471136181161945163749155607741420799128352894072300113241524377458728934494062724222049165358278028715653391431942942092660512952802253935978898032620561562081446044998411152544116575240302320865471845338151563359304338191560002828093755502679852816790050477034883580083969138285123932585099950564978674620085021549123429604664319844287940743770889196730125229 . . . . . . . . . . . . . . . . . . . . [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) ad2ef4c575d4cd1c91b0782befa1dcf837110394 . . . . . . . . . . . . . . . . [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 (19 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'blog.techlib.cz' . . . . . . . . . . . . . . . . [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) 00f10076005ea773f9df56c0e7b536487dd049e0327a919a0c84a112128418759681714558000001714739704e000004030047304502210097d8056bd2e8761608afe176ce51092d104ab8266a3de33168746718aa9ec431022050bcda9f0b0982ad3789cbd510ef44321338942eb4f5686fc4a9207fb49e3b37007700b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e000001714739703e0000040300483046022100d306b6fac2bea0247ac47d16e221d0cbc8ac66122ecaa240e2f53dc35d6d7cdd022100cd704f127703f1e0e05d697885f45cb53514b5182431418668b9fc99f8ee19a9 . . . . [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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