api.elfedu.pl

Issued by R3

About this certificate

This digital certificate with serial number 04:ec:04:43:34:2f:bd:af:4c:c5:bf:2a:23:9a:a4:66:2a:42 was issued on by Let's Encrypt.

With 3 subject alternative names this certificate can be used to secure multiple fqdn's. 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:
  • DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
  • Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
  • Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)

Certificate Subject

CN=api.elfedu.pl

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:ec:04:43:34:2f:bd:af:4c:c5:bf:2a:23:9a:a4:66:2a:42
Serial Number (int): 428761448174722853080274320967942489385538
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 01:2b:66:51:fd:04:01:f8:db:30:87:83:6f:26:72:92:00:ea:49:d0
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 24:5b:3d:8b:10:27:3b:19:3f:34:f0:1c:c3:7f:6e:23:0c:dc:b1:de
Fingerprint (sha256): bd:c3:59:64:38:b4:97:ee:68:37:57:e7:a7:e2:94:c6:bc:9e:7e:60:93:8c:67:1e:cf:09:27:fb:e3:54:be:5a

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate api.elfedu.pl

3

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for api.elfedu.pl

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

api.elfedu.pl
elfedu.pl
panel.elfedu.pl

Other certificates including the domain name elfedu.pl

(limited to 100 certificates)
auth.ordering2online.co.uk
launch.sb-fm.co.uk
dev.api.elfedu.pl
nolkabet.com
www.deaudioatexto.com
uat.panel.elfedu.pl
api.elfedu.pl
clinical2.sqa-io.com
eupayments.world
api.elfedu.pl
api.elfedu.pl
www.thestemgeeks.org
api.elfedu.pl
api.elfedu.pl
api.elfedu.pl
www.totspl.com
finetalk.in
oauth.dockchip.com

Certificate

The complete raw certificate details for api.elfedu.pl in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAtPynzEyW0yJTUA2sOQya
Wt1eWINpYIPa4xDIIqXJ1dRLekG9TggzRgO1GTBgmh8sGa0DTfvA2dRbcYSS3rYM
yMjxWvNL1T/hZRdf51auSZrPqDjfrhB00Dd65uQxxp/ADIBHMpy+lD6SbkLyifMY
nsYkF7plR5w6VIfb1nM1BvL1DRKXDgW9m6z3VhDArFIEPRfXbUBGeyVzrUpXOTId
H2DzNmSosPdkEjBVQQowbjpIVPcnWoAwxSfVbOOtu9WjWC8zoRgBDjORtVR6r5r/
F4iHdXFMxQTb5ZRKbPdktJ1KsTwmHt5F2p8oJ+H1Tk3rddx51eyHLhrXCzDd032K
zGTjbWcOO3KUQpEWXByy+KXt40xur1LX8PhtiZFqe3Sso7KK4wzOwVE+Nl5z1OLz
XjKmEc9Naz/VzST0COjRYV+zwzqLQ/K55l6J2UYqMc3B4FY9A6QhL0Ei7YIcwVIi
o7ewtI1ji82OdTDwikV/mXFxeJFXvIMtnCXcxvG3UP+f+kEXdR20wFvf+1EvMLHm
vHd1VlQEz4pqVUHlnUzXx9k3nZKAPdrHurypqfFGKyQhkQAZtO5wHuRZ74kfglOd
fEURJ0L4HWF7Amkb8EPVDnDK0l5s0yEnetVM//4E7DDg7p7d5PcJlvEJ3z0t9Q4i
RodXI9wgmhoWZiXraoHKTfcCAwEAAQ==
-----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 428761448174722853080274320967942489385538
 . . . . . . . . [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 2023-11-22 01:12:51 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-02-20 01:12:50 +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 'api.elfedu.pl'
 . . . . . . . . [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 738362277373163085385333465170194764428563923149211346438015513636377376541669666169522343096310881126490324973502942713816879390989704234701193515302587970902239241106011871070708552073794028104561720134210928073686444766882820940924975397080927929305197493520480257813583230635437306077347393499709373001366244093977570635363561895240420545876389568476373076098099860396271312949206295758511922852585560735608260164052588352668922655717640523563900578383529267750450967934584127631257983673044686678225129373255559654315334116792426739487922055033637705921263224388723596964861663997948697563699468090834364888931205388060150092502922538807449906063740759398680040834483697530720337707887725458537829865579327862336066586497551394696687619263425156888203609856308333264501993839084517052342482678439734808930994060520764349668780182389719512411036764852610134933980140276210133675113696657576181198140759617690172970590137389325560613652436263967768207940003442379068290517307471133795546523923733523599457168193164933646642298296567643447146982453312590122703524558707269310608531975817774695249269683142159107324272438772048491011183466717924092333354215592145756454749047895228929748089147763864686269538622799174724374269414903
 . . . . . . . . . . . . . . . . . . . . [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)
							012b6651fd0401f8db3087836f26729200ea49d0
 . . . . . . . . . . . . . . . . [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 (45 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'api.elfedu.pl'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'elfedu.pl'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'panel.elfedu.pl'
 . . . . . . . . . . . . . . . . [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 (12 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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f000760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018bf4cd36f8000004030047304502206b4c11c619a8bf72cc207ea6b1ade504cf6d1f4de99cecdf950931d65e36dc940221008441ed102a76149b159159f8254ff124fb83d7cd3964b3e815cb2b105459bf1d0076003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018bf4cd36f70000040300473045022100aa9da0a6534401fa5d7b895a9529e54f023b131e303cee8751f693d1bbf111cd022007a6fd2d407121f3222a98226482b98be50ab187719b2394c6426f44f41df234
 . . . . [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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