www.doodu.io

Issued by R3

About this certificate

This digital certificate with serial number 03:1c:30:76:34:55:f6:77:d4:67:31:08:f5:4d:94:b6:1c:a1 was issued on by Let's Encrypt.

With 2 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=www.doodu.io

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:1c:30:76:34:55:f6:77:d4:67:31:08:f5:4d:94:b6:1c:a1
Serial Number (int): 270929180765389971369638894973212287179937
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 80:aa:ed:69:cb:19:bd:54:ed:be:fe:0c:0c:db:ec:8e:37:b9:80:d7
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): a9:9b:6f:bb:af:05:80:66:92:91:1a:4b:63:7c:7a:17:de:32:b3:4a
Fingerprint (sha256): 24:88:e4:f3:14:94:25:3b:86:f6:12:7c:e1:99:29:d3:7b:b6:2e:b0:0d:a9:4e:a4:b0:91:50:ff:77:c1:ab:f2

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

Revocation information

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

Check the revocation status for certificate www.doodu.io

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.doodu.io

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

doodu.io
www.doodu.io

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Certificate

The complete raw certificate details for www.doodu.io in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnnfwUwkoB4a3x/e28p2S
YZGIcAR5RfnGa0d/hGwluKjhJGxlEwh2NnmDnoRASplt3NA38nXvLpeoC5oclnKO
Q//tvrZ12JBuguFr4auR7AWEBHIkz1EboWVxBOoHF4RnK1tdZSwYGQu3b1z+FhkR
zfBfv/eSiqcl26i9vEchSWrLpzETuu6v2QSheC1DF1s5YNOCYag9UkViogNf11le
MKSdmwoV6ltqJor62VSaSgPIEVnNY74fcRoyI1y4Z57ArJflCVm5o6Hc2+DSabys
oy7Y+k1dvVjkaiJO6UbU/lPqz0alq6Vl/Qbx7kgU17BfW9Zb3+RbHByMinWvibUw
eQIDAQAB
-----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 270929180765389971369638894973212287179937
 . . . . . . . . [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 2024-01-28 09:08:34 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-04-27 09:08:33 +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.doodu.io'
 . . . . . . . . [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 20004796194984868091444444095136007099864774067625368148499019944053994370576229758496760472799554589468325402907127065729717540677769696291329841371613851963313191420390330124841781062290131074866116709125701863212336581789168873486884256675314687363643604849956877546627606900970049462235779856204583278906336582092962210216267811637665187034401598832159882186882398924592279606640767023090245568234554434052161380976884168557226645853926327111870692549923769670129234179743106285574443735421930942401367715143938870113320697572523464715276860620018756656447721964384136757228017484463396463460625042768704648327289
 . . . . . . . . . . . . . . . . . . . . [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)
							80aaed69cb19bd54edbefe0c0cdbec8e37b980d7
 . . . . . . . . . . . . . . . . [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 (26 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'doodu.io'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.doodu.io'
 . . . . . . . . . . . . . . . . [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)
							00f00076003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018d4f8ad29c0000040300473045022069f3e15f1fc2b777ac396ae045c0f2c20316cd5a6cc8522caed92a61c9c2c99c022100c298d0f8ae164701fbba6b8546f92a551c0b0467db8238ec2537e9a5fa13a166007600eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018d4f8ad2950000040300473045022079bdcb177b3f8b110a5aae1cc99cc125757f834c2bac9dddcc26b53e54a6b0f702210090ac3c47c81b274e8844ff30689a412e632783ef364a796a43a87743f7b472a5
 . . . . [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)
		004491a3a2f480e773278bb65624f584f7aebe7dfec76f1f7356511054f8d2944c4c074ec8fcb8d25d4c596f2e336ef48edc71b7ced6522d25503607f9fbdac0e7037c40c259dd28e0fecdd36a8aff6e25d0bc45aeb61099a6f8331ffac4f1baf8c55182c3f65bb9632d936d8f1ab8a923fb02ad48e347221ad30300fb27678dca0dc9adf610c9c2764462067b00ee679bf4eb4c5314b78380751ffa4f83001facfdbe9b07fa97c2b4f587c37eea59e70da35cf9161537f2cd40ad95c27b8cbccb187f6a7d7dc4f4ec331321a9dd596d1c229603c2079ffaecec6bbcd9f7e859ba4a9524c94e306903707a49e7447698989b9366255c0f984415642954e282412d