cal.tsukuba.io
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:13:8a:0f:83:78:97:7a:6b:76:c9:01:25:7c:00:18:68:9b 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=cal.tsukuba.io
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:13:8a:0f:83:78:97:7a:6b:76:c9:01:25:7c:00:18:68:9bSerial Number (int): 267985736781199684971548944885858029824155
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: d9:78:92:1c:3a:e2:58:4e:ab:4f:f4:9e:91:c0:31:21:77:5a:cf:81
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): c4:5f:7c:67:51:90:26:90:4a:25:82:12:27:d6:d0:ff:7c:70:0d:31
Fingerprint (sha256): d7:6f:50:8e:ef:3d:9e:8f:44:40:20:f5:75:36:d1:26:d3:38:1a:47:46:89:13:1e:73:8f:f6:e3:ae:e2:f0:95
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate cal.tsukuba.io
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for cal.tsukuba.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
cal.tsukuba.io
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Certificate
The complete raw certificate details for cal.tsukuba.io in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFUzCCBDugAwIBAgISAxOKD4N4l3prdskBJXwAGGibMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA3MjkwNDI2MzhaFw0x OTEwMjcwNDI2MzhaMBkxFzAVBgNVBAMTDmNhbC50c3VrdWJhLmlvMIIBIjANBgkq hkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwIFHV1b+4skcXeQs6pihTP6ytHX9MYnq 7XSjUncL6NRqLpwGne4iMMmJtb/0oB/S6Erm+6A7xv5r4MdevHpbf85qRvw8OSci aaVsCV8TOn3RP8Sd96S9Pxpb2R2qr+FLjIPMRIBMcwYQkZFqEEF/4457p6pxQZks FmbJ4nVPLc7V3yi6zaEa1HI/fclbmyk9dRoCgH0i4U0t4t88dPw+w79XQfihQmCR 57Zq8o8q9AguJwoAnfI7bBOjbrLlunwMiq21WMXjMZMCiuEZuAc3iEXloo0ViFyu PgBbwYqLizFcY0VwfVb6c/uV52zsM6uGvJNYAsvzHQzv54WC3GOQfwIDAQABo4IC YjCCAl4wDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEF BQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBTZeJIcOuJYTqtP9J6RwDEhd1rP gTAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86jsoTBvBggrBgEFBQcBAQRj MGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14My5sZXRzZW5jcnlwdC5v cmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14My5sZXRzZW5jcnlwdC5v cmcvMBkGA1UdEQQSMBCCDmNhbC50c3VrdWJhLmlvMEwGA1UdIARFMEMwCAYGZ4EM AQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0 c2VuY3J5cHQub3JnMIIBAwYKKwYBBAHWeQIEAgSB9ASB8QDvAHYAdH7agzGtMxCR IZzOJU9CcMK//V5CIAjGNzV55hB7zFYAAAFsPDHi7AAABAMARzBFAiEAkFeSBDhi FbT4Fn/KhBlWG+weQWoO+fPwptX8zadTtEYCIF3PZtF2N39St6BCavpBvKh+bO41 bndiBWq8aL/9trPBAHUAKTxRllTIOWW6qlD8WAfUt2+/WHopctykwwz05UVH9HgA AAFsPDHi1wAABAMARjBEAiBwlk6mTPWP+boHm+XM8AWB12XHSVqcGzJuwMcWvjk2 PAIgB7L5kPtwBYKZcrYj0r0MG8faw6TzfRHFJySw3UzB6YowDQYJKoZIhvcNAQEL BQADggEBAE9IhPiCO3nH+tqJIPMM3z9RRdu+DKVbBvfxiurD0XkAzCe40D8O7A9G xMkfUmmMMNbPXdcbd8SezgjDfc/5jAJGoRze2//uyLL+6cx5JngWkyw9IixyBkgr KGIfwS+x6LYhE34SNtTTdwjtKpd0kaW5JL//7yYpmDNH+dOjqfswJQkdsOpnbi19 A/1eEy+yelcjkuTtqFLmlc3GWZfKUSvOo3KgK7/WGXQ+u1Mdg1yP7iYwBu96M8Tm Tayjlnm3l1fqXG1MtlCe7qvf8tqFYBCHC4BTuODGYsrXqnTfTOy/ai97qMvd47iA /65O+nF68Hghee+i2qk96fFgp8qr0AE= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwIFHV1b+4skcXeQs6pih TP6ytHX9MYnq7XSjUncL6NRqLpwGne4iMMmJtb/0oB/S6Erm+6A7xv5r4MdevHpb f85qRvw8OSciaaVsCV8TOn3RP8Sd96S9Pxpb2R2qr+FLjIPMRIBMcwYQkZFqEEF/ 4457p6pxQZksFmbJ4nVPLc7V3yi6zaEa1HI/fclbmyk9dRoCgH0i4U0t4t88dPw+ w79XQfihQmCR57Zq8o8q9AguJwoAnfI7bBOjbrLlunwMiq21WMXjMZMCiuEZuAc3 iEXloo0ViFyuPgBbwYqLizFcY0VwfVb6c/uV52zsM6uGvJNYAsvzHQzv54WC3GOQ fwIDAQAB -----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 267985736781199684971548944885858029824155 . . . . . . . . [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 2019-07-29 04:26:38 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-10-27 04:26:38 +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 'cal.tsukuba.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 24301504244824281467140345047996176612936550812847512644660537353016811486900084171743213352636480068284809191408717608294899936737883838244183010714301772907822241047972261250869472514214105146490841658219879709732999349145461280485841582657535764989394740019461260407154683489763572621073604337067179926929387816865838611500284167786279042767677044201863567703870326084066414628376338162483156690010401904765030084026810289898672583831326522693134569331294524402375896877895019293374029185871036947755362787356043168744004333910601693895018401295194940110695490202512659229684790055932371901295403344538273350652031 . . . . . . . . . . . . . . . . . . . . [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) d978921c3ae2584eab4ff49e91c03121775acf81 . . . . . . . . . . . . . . . . [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 'cal.tsukuba.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 (244 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes) 00ef007600747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016c3c31e2ec000004030047304502210090579204386215b4f8167fca8419561bec1e416a0ef9f3f0a6d5fccda753b44602205dcf66d176377f52b7a0426afa41bca87e6cee356e7762056abc68bffdb6b3c1007500293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016c3c31e2d70000040300463044022070964ea64cf58ff9ba079be5ccf00581d765c7495a9c1b326ec0c716be39363c022007b2f990fb7005829972b623d2bd0c1bc7dac3a4f37d11c52724b0dd4cc1e98a . . . . [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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