lets-encrypt-x1-cross-signed.der: CN=Let's Encrypt Authority X1,O=Let's Encrypt,C=US (Intermediate Certificate, Expiring 2020-10-19) detail info and audit record

Last Updated: 2023-05-06

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CA Certificate Information and Audit Record

This certificate is intermediate certificate used for the issuance of other certificates.

Certificate Download URL: https://letsencrypt.org/certs/lets-encrypt-x1-cross-signed.der (in DER format )
Serial Number : 202146267183415291506814634431721915581
SHA-1 Fingerprint : 3eae91937ec85d74483ff4b77b07b43e2af36bf4
SHA-1 Fingerprint : 3e:ae:91:93:7e:c8:5d:74:48:3f:f4:b7:7b:07:b4:3e:2a:f3:6b:f4
SHA-256 Fingerprint : 7fdce3bf4103c2684b3adbb5792884bd45c75094c217788863950346f79c90a3
SHA-256 Fingerprint : 7f:dc:e3:bf:41:03:c2:68:4b:3a:db:b5:79:28:84:bd:45:c7:50:94:c2:17:78:88:63:95:03:46:f7:9c:90:a3
Signature Hash Algorithm : sha256
Subject : CN=Let’s Encrypt Authority X1,O=Let’s Encrypt,C=US
- Country Name: US (United States of America)
- Organization: Let’s Encrypt
- Common Name: Let’s Encrypt Authority X1
Not Valid Before: 2015-10-19 22:33:36
Not Valid After: 2020-10-19 22:33:36
Issuer (Parent Certificate):
- Issuer Name: CN=DST Root CA X3,O=Digital Signature Trust Co.
- Issuer Certificate URL: NA
Audit Record:
- Revocation Status: Not Revoked
- Certificate Policy (CP) URL: https://letsencrypt.org/documents/isrg-cp-v2.4/
- Certificate Practice Statement (CPS) URL: https://letsencrypt.org/documents/isrg-cps-v2.9/
- Auditor: Schellman & Company, LLC.
- Standard Audit URL: https://letsencrypt.org/audits/ISRG-2020-WebTrust-for-CAs-Report.pdf
- Standard Audit Period Start Date: 2019.09.01
- Standard Audit Period End Date: 2020.08.31
- Standard Audit Statement Date: 2020.10.02
- Standard Audit Type: WebTrust
- Full CRL Issued By This CA: Unknown
- Check its issuer’s audit information: CN=DST Root CA X3,O=Digital Signature Trust Co. .

Download certificate through curl:

curl -sSL "https://letsencrypt.org/certs/lets-encrypt-x1-cross-signed.der" --output cert.crt

Download certificate through wget:

wget -q "https://letsencrypt.org/certs/lets-encrypt-x1-cross-signed.der" --output-document=cert.crt

CA Certificate Detail Information

Use openssl x509 to decode DER certificate to get detail information:

openssl x509 -in cert.crt -inform der -text -noout

Use openssl x509 to decode PEM certificate to get detail information:

openssl x509 -in cert.crt -inform pem -text -noout

Decoded detail certificate information:

Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            98:13:f4:75:13:e5:75:0b:43:e7:43:1e:97:1e:44:bd
    Signature Algorithm: sha256WithRSAEncryption
        Issuer: O=Digital Signature Trust Co., CN=DST Root CA X3
        Validity
            Not Before: Oct 19 22:33:36 2015 GMT
            Not After : Oct 19 22:33:36 2020 GMT
        Subject: C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X1
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                RSA Public-Key: (2048 bit)
                Modulus:
                    00:9c:d3:0c:f0:5a:e5:2e:47:b7:72:5d:37:83:b3:
                    68:63:30:ea:d7:35:26:19:25:e1:bd:be:35:f1:70:
                    92:2f:b7:b8:4b:41:05:ab:a9:9e:35:08:58:ec:b1:
                    2a:c4:68:87:0b:a3:e3:75:e4:e6:f3:a7:62:71:ba:
                    79:81:60:1f:d7:91:9a:9f:f3:d0:78:67:71:c8:69:
                    0e:95:91:cf:fe:e6:99:e9:60:3c:48:cc:7e:ca:4d:
                    77:12:24:9d:47:1b:5a:eb:b9:ec:1e:37:00:1c:9c:
                    ac:7b:a7:05:ea:ce:4a:eb:bd:41:e5:36:98:b9:cb:
                    fd:6d:3c:96:68:df:23:2a:42:90:0c:86:74:67:c8:
                    7f:a5:9a:b8:52:61:14:13:3f:65:e9:82:87:cb:db:
                    fa:0e:56:f6:86:89:f3:85:3f:97:86:af:b0:dc:1a:
                    ef:6b:0d:95:16:7d:c4:2b:a0:65:b2:99:04:36:75:
                    80:6b:ac:4a:f3:1b:90:49:78:2f:a2:96:4f:2a:20:
                    25:29:04:c6:74:c0:d0:31:cd:8f:31:38:95:16:ba:
                    a8:33:b8:43:f1:b1:1f:c3:30:7f:a2:79:31:13:3d:
                    2d:36:f8:e3:fc:f2:33:6a:b9:39:31:c5:af:c4:8d:
                    0d:1d:64:16:33:aa:fa:84:29:b6:d4:0b:c0:d8:7d:
                    c3:93
                Exponent: 65537 (0x10001)
        X509v3 extensions:
            X509v3 Basic Constraints: critical
                CA:TRUE, pathlen:0
            X509v3 Key Usage: critical
                Digital Signature, Certificate Sign, CRL Sign
            Authority Information Access: 
                OCSP - URI:http://isrg.trustid.ocsp.identrust.com
                CA Issuers - URI:http://apps.identrust.com/roots/dstrootcax3.p7c

            X509v3 Authority Key Identifier: 
                keyid:C4:A7:B1:A4:7B:2C:71:FA:DB:E1:4B:90:75:FF:C4:15:60:85:89:10

            X509v3 Certificate Policies: 
                Policy: 2.23.140.1.2.1
                Policy: 1.3.6.1.4.1.44947.1.1.1
                  CPS: http://cps.root-x1.letsencrypt.org

            X509v3 CRL Distribution Points: 

                Full Name:
                  URI:http://crl.identrust.com/DSTROOTCAX3CRL.crl

            X509v3 Name Constraints: 
                Excluded:
                  DNS:.mil

            X509v3 Subject Key Identifier: 
                A8:4A:6A:63:04:7D:DD:BA:E6:D1:39:B7:A6:45:65:EF:F3:A8:EC:A1
    Signature Algorithm: sha256WithRSAEncryption
         d1:c8:22:4b:ac:ef:e3:09:89:96:50:b1:8d:78:70:2a:01:1b:
         58:5d:bf:42:76:d3:f1:72:5a:8e:69:a6:77:e3:2f:bf:12:da:
         4e:2c:d8:62:d1:27:b8:83:f5:90:ca:12:b9:dd:bd:b3:45:19:
         cb:16:fb:d9:0a:2b:f4:e7:63:6d:61:a7:80:dd:21:3b:fc:4b:
         d6:58:43:ba:1a:a2:ab:3b:1f:08:44:31:8f:6c:89:b1:03:e1:
         a5:f0:d3:dc:6b:25:94:c2:f7:32:b5:b8:87:d6:ea:de:5d:1d:
         08:ee:39:6b:fe:1c:7a:16:66:7b:a9:cb:1a:6c:11:49:44:68:
         56:fe:fd:20:88:e0:a0:92:05:d0:2c:63:10:1c:b0:76:08:e7:
         1c:44:23:82:ee:b4:7a:7a:b3:73:93:d8:5b:8e:f7:45:9f:76:
         c2:24:ea:ae:fc:38:c4:9d:9f:ce:f9:6c:d8:dd:05:80:2a:c5:
         4a:76:fc:b1:08:1d:f0:c1:90:ba:10:cf:48:45:26:6c:00:6d:
         86:a1:a8:a6:8b:9f:bd:cf:00:09:b5:5f:69:23:7f:5c:3c:0d:
         d9:e4:69:b3:8b:19:e3:95:72:3f:4b:43:eb:3a:ee:f0:72:93:
         1e:1a:9d:38:d4:46:46:ea:66:c9:54:11:4b:27:da:4e:71:7a:
         e6:b6:cd:49