www.bufalo.org

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:7f:83:a6:2d:f0:09:63:33:15:1e:92:cd:30:18:ea:0f:24 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): 03:7f:83:a6:2d:f0:09:63:33:15:1e:92:cd:30:18:ea:0f:24
Serial Number (int): 304727710114692362018180427793377604013860
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: f6:35:ed:f8:fa:8e:bc:c2:1f:03:69:2b:a2:15:75:be:e7:86:74:ef
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): e5:58:9d:b7:ee:b8:03:46:92:27:42:80:fa:d9:a2:58:cf:57:7e:45
Fingerprint (sha256): 54:85:cf:8d:2d:63:43:37:7c:f3:cb:1e:5d:5f:3b:18:ba:ac:2c:46:77:a9:ec:2f:ae:85:5c:cf:a2:21:17:58

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 304727710114692362018180427793377604013860
 . . . . . . . . [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 2019-08-03 05:21:57 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-11-01 05:21:57 +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 880354351288900412593769532332101184054041564070200142116463283624951341534021574230329431175641056600302573289783012052307571314854284799150079253670878008450848555830034130667719429855132263058781004711395282241831576478478818459468276232442720915263156629467695693707300050747116564575643260941027914718406405788172626606564242641633157876120173085572694637304892113713478640580609577264305142407711749935128979932522048505105999925406866917350849789363436590471183020072056740241999743334256646308102020138089837843887932392871378652999972266064802924744341988239203710062796131273966438368015228419841808846606137512815650371185708939392080850298398020816444333795140006282464397339033214899700606254534186495446430607634848811373677086329077259761002057371800611082051851848627266088131886948996041601900817634067919277136404159978168597728968164525288012075459463177213160446154545765256479887563093266555360749606323692161365872009599198423918366591932975850697240083809807541549560758655074456870163238813596657584436369446805109463406606336830126404395750959292494666589956423902169864532485953033010259423859428305381743773148969135864700552135642840309776460433754749763195824045129556634889208805975525388771287313966847
 . . . . . . . . . . . . . . . . . . . . [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)
							f635edf8fa8ebcc21f03692ba21575bee78674ef
 . . . . . . . . . . . . . . . . [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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007500293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016c56245447000004030046304402200dbdcdfb9b6f9b8c560555e6367a880dc585be045ad60f18fae51bf27ced68b1022060c56a40de3c4fed1284240513c7dc57d1fb287e7e8ca613d8a60c36f3cb24270076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016c5624560900000403004730450221008567c0a7e0bbb470b470d2ac8009be64a200667df479ad6ce9f1514795e473ba02201f5c1e6adea67eb704b32a65a7e4f9ac4a81e81023a787823a99299aa832cc0b
 . . . . [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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