*.legacy.cs50.io

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:8f:42:ba:be:8d:7c:19:7a:b1:44:55:27:d2:34:a9:af:ee 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=*.legacy.cs50.io

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:8f:42:ba:be:8d:7c:19:7a:b1:44:55:27:d2:34:a9:af:ee
Serial Number (int): 397198220876540081339399422612782608658414
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 41:2b:0c:7f:78:75:0f:21:77:a1:94:de:89:cb:70:90:3b:ea:9a:31
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 16:3c:dd:1a:d4:8f:fc:d5:13:83:7c:48:4b:4f:04:b9:dd:e5:13:c8
Fingerprint (sha256): f5:fc:bf:bd:8d:56:2f:f7:3d:d8:62:22:f2:4a:01:4e:3a:08:03:1b:78:0a:ba:4d:63:9f:8f:c7:88:2f:70:f2

Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/

Revocation information

OCSP Server: http://ocsp.int-x3.letsencrypt.org

Check the revocation status for certificate *.legacy.cs50.io

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for *.legacy.cs50.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

*.legacy.cs50.io

Other certificates including the domain name cs50.io

(limited to 100 certificates)
ap.cs50.school
ap.cs50.school
ap.cs50.school
*.legacy.cs50.io
ap.cs50.school
*.cs50.io
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
cs50.io
cs50.net
cs50.io
*.cs50.io
cs50.net
cs50.io
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
cs50.io
ide.cs50.io
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
cs50.io
cs50.dev
*.legacy.cs50.io
ap.cs50.school
cs50.net
*.cs50.io
ap.cs50.school
cs50.io
*.legacy.cs50.io
cs50.net
cs50.io
ap.cs50.school
*.legacy.cs50.io
cs50.net
ap.cs50.school
ap.cs50.school
cs50.io
cs50.io
ap.cs50.school
*.legacy.cs50.io
cs50.dev

Certificate

The complete raw certificate details for *.legacy.cs50.io in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAp6ep8clEjMo4gMre7hk/
1RiYuIYR/SHqKtRr2RUpi7/bumWKCDOwgNLPXL79jW4MBrT3oqm3LZMewDqregCK
pYQTgvP03Mljj+vgxb0gws1uuFkLe2ppPuOBtw+EeosW7s45Y9juFg8yCyuKnqmE
FBy7rFpglhBcILms71FJHtxWqU57kXdw0rjOI2yGCQH4CtNjkhULUsRptsYcJNfw
0gY4LYTPtCKyRTqHUyqr3XTIETIUuLX5PF5ezTyn1/bRQwS/djaWlzOYcSwyH/vc
EjotdPgz4pzQtuYyBght87BlzSmDzD7UhPCPUiLDOYvxN8lQCvatXtunptph2Lut
0wIDAQAB
-----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 397198220876540081339399422612782608658414
 . . . . . . . . [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 2019-08-20 11:41:27 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-11-18 11:41:27 +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:12|false] UTF8String '*.legacy.cs50.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 21164475053060248479862119487678081350234131993291497757189407509424931976106338886426804354893121112647379512451890462438769122596043802207048291135634421759891092676799749393375461568212142803945662315493200347403041764379185621286767859909589792361634073763771859932662465027221456048104722570085569963789394726331721060085754257423977301041013011974559768110051238409091293994834629424882012666389762458408040193047788811519558741484115680884703669167303077251792264612180970261335228113989873625063381843898100198017884982541333752793422791772565817910604667307566294652523352235073323669685444038670949770046931
 . . . . . . . . . . . . . . . . . . . . [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)
							412b0c7f78750f2177a194de89cb70903bea9a31
 . . . . . . . . . . . . . . . . [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 '*.legacy.cs50.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 (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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016caf0be57a0000040300473045022100ab30b01d10ae79f6ffcbc5f48215ebb047eb80e887a26b255945aa64d4ad4d0602203bdd6a9cfaa7c418715367b58976d0fc1a6fe10d61e6e9ff40f4bbe93936786a00760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016caf0be4fa0000040300473045022100b0d777a6dc2c7d196eb622c133e54c3bb331615afe9a29b3eda485c261d6d999022032a4319edebd4a17a6aff3866fbfb9b2cffe8f3896c61f22c542a8e1134ee078
 . . . . [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)
		001333f22c268d49e3f384335f3a66511011b91eaf41226408c4b4b4c9e933572d35972c923865e3a9ea38e5411cc3b198904d2b3aaa39e4e95f9297ee3f03b14cde048a2579f9c0ab022d254d7251bfd04f74310e7e28b0446955596e0cb21baa4b12e95368c7770c71b928d0390875442dc77c4850413bc5fc6f80d1f90f4f800396885c852647c0561b7f88e09f0687030e23d77819db4f809ed747e2abf92cefa697e3ff585796b2606e38767622876e05cd6a57be8f8d998a846042925d86409a490a4d3c01bebad084ea28516b6549463f757a5275a8cdf05950c9202b40caf7df81ca33398ee2dc5bfac907b2148d82fa01a1aad289cff821f5556ed4b8