www.bufalo.org

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:4c:c0:a2:63:c6:21:c9:8a:0b:be:b2:91:5e:6e:85:dc:80 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=www.bufalo.org

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:4c:c0:a2:63:c6:21:c9:8a:0b:be:b2:91:5e:6e:85:dc:80
Serial Number (int): 287454372632210033243418309336492816063616
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 87:70:b3:f7:94:cd:90:c9:ac:a5:25:75:83:43:5c:c9:ac:32:e7:07
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 83:97:f1:b7:e7:49:2b:44:22:3e:ff:28:e7:38:f5:3f:60:5e:59:ce
Fingerprint (sha256): 26:dc:32:4e:d5:46:c4:4c:74:8f:d2:25:3c:de:e1:af:48:1d:0b:e9:4f:c3:99:42:f6:13:e4:e7:11:49:d8:4a

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 www.bufalo.org

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.bufalo.org

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

www.bufalo.org

Other certificates including the domain name bufalo.org

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.bufalo.org 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 287454372632210033243418309336492816063616
 . . . . . . . . [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 2019-10-08 22:18:01 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-01-06 22:18:01 +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.bufalo.org'
 . . . . . . . . [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 812408958093220700351413101656539237014532189799788454924170848077120143056465543032207209734335148971935516723809240090848549165887859278405228213331405982761746633471147252061336967022106528263520511124114302376679831135558858392149255193505204879950244189706635408854050991146998411971491560366850380843869159367642392353497582556515469538753792495056590366842087610619325902411288556614407087223390609245019881253092480043182857822985078301679017032914000825814362689141385977259695518080177824123418266935762604339708012854618157055140287849237925786683472956790051801590344455780946490376975183819070463062434395641723266687555933285021097203133628592191531670464488234955591042963519339517426133179973505654482618545222193331804656925040068907220936617352732420400762123842536612644482466686800861781814313982153081849951909991980047300349956145954567943260974411108186086190511586565526106508615678407143316648717028438571719534495593140558704403895219242344551878852182686638438410630226141299445864238835715776381956932292129943752369654982524688393392125780494705336110813120534343039942589128321063734193772508263634540597687992835593746170227132069155762864829855483276330327487541876927467584637952117849194752048257043
 . . . . . . . . . . . . . . . . . . . . [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)
							8770b3f794cd90c9aca5257583435cc9ac32e707
 . . . . . . . . . . . . . . . . [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 (18 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.bufalo.org'
 . . . . . . . . . . . . . . . . [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)
							00f1007700f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000016dadaa4b6f0000040300483046022100890caebf6b452518f8a1ae9f3a254639c509c68de9c1d60c21c3fbbeb9738033022100b78e8927334e27e1254ebc217fac576213531327dc02a970f7012b5a4aa0d640007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016dadaa4b600000040300473045022100fb7e8630976783e676c0e33b989841761209864235c28dfc403955670d107aab0220792512250cf2258e931ac5da0fede4dce37ef2614b1baff8b63f20249744e8c6
 . . . . [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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