andujarlibros.es

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:7f:a3:14:de:94:16:28:31:70:ae:4a:75:b3:de:8a:20:dd 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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

Certificate Subject

CN=andujarlibros.es

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:7f:a3:14:de:94:16:28:31:70:ae:4a:75:b3:de:8a:20:dd
Serial Number (int): 304769490917917594107061527045792407888093
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 52:c8:66:3d:2e:93:a9:de:ca:30:a9:e0:04:77:6f:75:f5:da:28:39
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): d2:4d:64:e9:85:f3:c1:b5:bd:d3:cb:22:ba:6b:e4:12:f9:76:5a:b2
Fingerprint (sha256): a8:97:b8:2b:38:bf:0f:76:41:1d:d9:85:d5:10:6d:44:a8:98:00:76:46:07:33:5a:69:c6:5a:f6:c3:9d:9d:40

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 andujarlibros.es

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for andujarlibros.es

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

andujarlibros.es
www.andujarlibros.es

Other certificates including the domain name andujarlibros.es

(limited to 100 certificates)
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
www.andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es
andujarlibros.es

Certificate

The complete raw certificate details for andujarlibros.es in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIGHzCCBQegAwIBAgISA3+jFN6UFigxcK5KdbPeiiDdMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODA5MDMxOTQ0MjJaFw0x
ODEyMDIxOTQ0MjJaMBsxGTAXBgNVBAMTEGFuZHVqYXJsaWJyb3MuZXMwggEiMA0G
CSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDQvdeeaOivBb7Mzoayu9lQS9XIrXQj
uOotB85wQAzE3MaXW0im9i5zEt8++fJxAL0gJOl4cexc+EunucEfh5KWuclyZPHR
1Z5g2xs3HDz6ekf42QQRgXpf3kBnTabxNpmnMZk12CBgmCJWv4oShoR6f3Lq/gPb
5OwXio9p3Wr4XjgePqufAngQQRw48XsJIU1nS2KDwMNsLgkMxpuEMce5ln4bAQwG
sofVT3luKpc3uDvJ/nld5ZBn0R4j1k2t3RPw0unQIE0PhL8lt8vCO9j+Wir1K6ca
Y5FAQ+NAc4yERgb7yLbwAUVx7isMqEgB4IROovizo0gbR/abV6xsZVQZAgMBAAGj
ggMsMIIDKDAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsG
AQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFFLIZj0uk6neyjCp4AR3b3X1
2ig5MB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8GCCsGAQUFBwEB
BGMwYTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxldHNlbmNyeXB0
Lm9yZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxldHNlbmNyeXB0
Lm9yZy8wMQYDVR0RBCowKIIQYW5kdWphcmxpYnJvcy5lc4IUd3d3LmFuZHVqYXJs
aWJyb3MuZXMwgf4GA1UdIASB9jCB8zAIBgZngQwBAgEwgeYGCysGAQQBgt8TAQEB
MIHWMCYGCCsGAQUFBwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCBqwYI
KwYBBQUHAgIwgZ4MgZtUaGlzIENlcnRpZmljYXRlIG1heSBvbmx5IGJlIHJlbGll
ZCB1cG9uIGJ5IFJlbHlpbmcgUGFydGllcyBhbmQgb25seSBpbiBhY2NvcmRhbmNl
IHdpdGggdGhlIENlcnRpZmljYXRlIFBvbGljeSBmb3VuZCBhdCBodHRwczovL2xl
dHNlbmNyeXB0Lm9yZy9yZXBvc2l0b3J5LzCCAQIGCisGAQQB1nkCBAIEgfMEgfAA
7gB1ANt0r+7LKeyx/so+cW0s5bmquzb3hHGDx12dTze2H79kAAABZaEt3MUAAAQD
AEYwRAIgbSz8uxDsFTLRhgwWwLU74iKXAYIo1id3ZJePol9QpTECIDTtNe3Ses8U
Fo+3EkBevTLsWyjNTSYANOwfz2TeaFWDAHUAKTxRllTIOWW6qlD8WAfUt2+/WHop
ctykwwz05UVH9HgAAAFloS3c4gAABAMARjBEAiBm7KMVfy98aRAcPY66mc+1FzC3
8SKPfVFYQuJHzdlI2AIgJ+pmGJwPBwTP0s+lTxKH0f72NmsLc4OGiTiZvFd2vJMw
DQYJKoZIhvcNAQELBQADggEBABlVBq+ydoolOKqAWHWIsDV6/DdEraxfqzJuD0MP
ZMjfJpixqDUJzNQ1NXWdiW/3obqIXblvGN00aP4RWPSWoZWUkAtKZfmbF13mVO5q
71Oh+PK0UdQ/e8pCHj5a7nhLvuSTV/Is/ao33xDlQZYtNXZ9+k/5kLMhSs8ns51y
j92ACJfV962KIrb3vTXSrTHSiR2TVJHeznWZyjyHLuRBBsRt063VPudDCAcbJzLT
w5qK40oohwtqLouh0vWmSOownOszTV1LU4xE0KkQuYlPeglhqnSIdac7UbUQXYc1
CxfrHiNPQdhEj+fSJJjIwJFyXDJEpP0ul6SVh1FZOpUrTRo=
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0L3XnmjorwW+zM6GsrvZ
UEvVyK10I7jqLQfOcEAMxNzGl1tIpvYucxLfPvnycQC9ICTpeHHsXPhLp7nBH4eS
lrnJcmTx0dWeYNsbNxw8+npH+NkEEYF6X95AZ02m8TaZpzGZNdggYJgiVr+KEoaE
en9y6v4D2+TsF4qPad1q+F44Hj6rnwJ4EEEcOPF7CSFNZ0tig8DDbC4JDMabhDHH
uZZ+GwEMBrKH1U95biqXN7g7yf55XeWQZ9EeI9ZNrd0T8NLp0CBND4S/JbfLwjvY
/loq9SunGmORQEPjQHOMhEYG+8i28AFFce4rDKhIAeCETqL4s6NIG0f2m1esbGVU
GQIDAQAB
-----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 304769490917917594107061527045792407888093
 . . . . . . . . [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 2018-09-03 19:44:22 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-12-02 19:44:22 +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 'andujarlibros.es'
 . . . . . . . . [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 26351182140853851165109920864303601777824766713478422754753951871709547611193368704464637715127940399483401854977882880869370882597365708417741880974925971346749251433806480705700360487864524393890060423524327705477065946236182838203389354394407174830388824401673328435142046990329116454928273023122713811269396989871918036795752626410115210600292162153072983895560758913351384924611322446443529562373108568564527213811761643193977203697873519886905539343601844482170349439378115676127049555194980364815460716500692824239132784710785918399920985415845579850289325426809568833288645473868469240140435059376695680521241
 . . . . . . . . . . . . . . . . . . . . [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)
							52c8663d2e93a9deca30a9e004776f75f5da2839
 . . . . . . . . . . . . . . . . [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 (42 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'andujarlibros.es'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.andujarlibros.es'
 . . . . . . . . . . . . . . . . [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 (246 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 1.3.6.1.5.5.7.2.2 (unotice)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String 'This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/'
 . . . . . . . . . . . . . . . . [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 (243 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes)
							00ee007500db74afeecb29ecb1feca3e716d2ce5b9aabb36f7847183c75d9d4f37b61fbf6400000165a12ddcc5000004030046304402206d2cfcbb10ec1532d1860c16c0b53be22297018228d6277764978fa25f50a531022034ed35edd27acf14168fb712405ebd32ec5b28cd4d260034ec1fcf64de685583007500293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f47800000165a12ddce20000040300463044022066eca3157f2f7c69101c3d8eba99cfb51730b7f1228f7d515842e247cdd948d8022027ea66189c0f0704cfd2cfa54f1287d1fef6366b0b738386893899bc5776bc93
 . . . . [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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