charleswu.com

Issued by R3

About this certificate

This digital certificate with serial number 04:c3:e1:85:d8:a7:5b:02:0b:bd:80:6b:cd:7e:d0:e8:48:84 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=charleswu.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:c3:e1:85:d8:a7:5b:02:0b:bd:80:6b:cd:7e:d0:e8:48:84
Serial Number (int): 415103976545417521303161654842441855420548
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 6e:e2:2f:f5:b8:df:dc:c1:f0:08:ce:89:ca:86:f2:c4:47:b9:ec:01
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 18:02:78:46:40:df:9f:d3:e9:e4:22:f3:fa:98:d3:2b:0a:45:95:50
Fingerprint (sha256): bd:b7:0d:85:6a:8b:e4:60:4b:67:f9:20:e2:84:40:1c:c0:ba:b0:e4:75:9c:2e:15:26:33:53:8e:24:77:b8:80

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

Revocation information

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

Check the revocation status for certificate charleswu.com

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for charleswu.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

charleswu.com
www.charleswu.com

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Certificate

The complete raw certificate details for charleswu.com in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----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-----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 415103976545417521303161654842441855420548
 . . . . . . . . [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 2024-02-20 19:04:41 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-05-20 19:04:40 +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 'charleswu.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 984613564065135231162935694969161568919917857135029015151678094731264075727875291004020436041895583613042897687369770444009307327389182055539469277091721298165957031387955318998107121245831047107351135379208200452129938164961716687328285353820087764591652013756301413235314873283878725026246445049251377970797360303670888259239734864172360814534318803755268852374489398760568326638426110474715390931188519222671522192894328801279349720819979463846773972454019005913356294608279947575779694118622116379544489553896892522001338743276801358850431527063944664898987549500531803057533431191432225145026335772638990612023948414643556037015368055605604802242752780773379400418351567435335198349712108954638031314436904571322288238392312807409475802988518846112181878120110420301017920743406774196000362573998122523256121014381830275474512747280111338025187420218434181670678620465696113200480675192573494350520585001837187848669904776210426267150156946184048925060269248722355565623258345607149521226665694704436466193211610222401523107394346488027093905878539725757998456685918512050117169017553015745054808672143341638818766753290385575123438309142202157659326518902621825715782827037381840298444298921069400149872442145583575941137714869
 . . . . . . . . . . . . . . . . . . . . [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)
							6ee22ff5b8dfdcc1f008ce89ca86f2c447b9ec01
 . . . . . . . . . . . . . . . . [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 (36 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'charleswu.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.charleswu.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 (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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007500eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018dc81eda240000040300463044022049008a2db10afea41bf53487d01b3de5b5e8f8fe1847b08de27ebaf33d64bf6d02200f83b3761c05621904df15af3dd9d8ae233fdecf33984463554738e4582d88da00760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018dc81edd78000004030047304502203fa9e4f90b412ded654540d4c71b01f75d43c3b476ddbbc60206657d2b49b6ee022100a4c8501b514b503f5382094e260095ac028c433a19b68b36ab024cced5437b09
 . . . . [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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