How to check for Authenticity the Window UEFI CA 2023

Question

Hi Colleague,

I have performed the following steps at my command prompt and convert the crt to pem format for viewing. However, the URL in the CA Issuer and Distribution Points do not have https secure connection. Please advise on how to Authentify those certifications downloaded from Microsoft on our end, in case they were replaced during the transfer.

cmd commands

==============

openssl x509 -in "c:\windows uefi ca 2023.cer" -inform DER -out "C:\windows uefi ca 2023.pem" -outform PEM (conversion from cer to pem)

openssl x509 -in "c:\Users\user\Downloads\windows uefi ca 2023.pem" -text (reading pem)

PEM file

========

Certificate:

Data:

    Version: 3 (0x2)

    Serial Number:

        33:00:00:00:1a:88:8b:98:00:56:22:84:c1:00:00:00:00:00:1a

    Signature Algorithm: sha256WithRSAEncryption

    Issuer: C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, CN=Microsoft Root Certificate Authority 2010

    Validity

        Not Before: Jun 13 18:58:29 2023 GMT

        Not After : Jun 13 19:08:29 2035 GMT

    Subject: C=US, O=Microsoft Corporation, CN=Windows UEFI CA 2023

    Subject Public Key Info:

        Public Key Algorithm: rsaEncryption

            Public-Key: (2048 bit)

            Modulus:

                00:bc:b2:35:d1:54:79:b4:8f:cc:81:2a:6e:b3:12:

                d6:93:97:30:7c:38:5c:bf:79:92:19:0a:0f:2d:0a:

                fe:bf:e0:a8:d8:32:3f:d2:ab:6f:6f:81:c1:4d:17:

                69:45:cf:85:80:27:a3:7c:b3:31:cc:a5:a7:4d:f9:

                43:d0:5a:2f:d7:18:1b:d2:58:96:05:39:a3:95:b7:

                bc:dd:79:c1:a0:cf:8f:e2:53:1e:2b:26:62:a8:1c:

                ae:36:1e:4f:a1:df:b9:13:ba:0c:25:bb:24:65:67:

                01:aa:1d:41:10:b7:36:c1:6b:2e:b5:6c:10:d3:4e:

                96:d0:9f:2a:a1:f1:ed:a1:15:0b:82:95:c5:ff:63:

                8a:13:b5:92:34:1e:31:5e:61:11:ae:5d:cc:f1:10:

                e6:4c:79:c9:72:b2:34:8a:82:56:2d:ab:0f:7c:c0:

                4f:93:8e:59:75:41:86:ac:09:10:09:f2:51:65:50:

                b5:f5:21:b3:26:39:8d:aa:c4:91:b3:dc:ac:64:23:

                06:cd:35:5f:0d:42:49:9c:4f:0d:ce:80:83:82:59:

                fe:df:4b:44:e1:40:c8:3d:63:b6:cf:b4:42:0d:39:

                5c:d2:42:10:0c:08:c2:74:eb:1c:dc:6e:bc:0a:ac:

                98:bb:cc:fa:1e:3c:a7:83:16:c5:db:02:da:d9:96:

                df:6b

            Exponent: 65537 (0x10001)

    X509v3 extensions:

        X509v3 Key Usage: critical

            Digital Signature, Certificate Sign, CRL Sign

        1.3.6.1.4.1.311.21.1:

            ...

        X509v3 Subject Key Identifier:

            AE:FC:5F:BB:BE:05:5D:8F:8D:AA:58:54:73:49:94:17:AB:5A:52:72

        1.3.6.1.4.1.311.20.2:

            .

.S.u.b.C.A

        X509v3 Basic Constraints: critical

            CA:TRUE

        X509v3 Authority Key Identifier:

            D5:F6:56:CB:8F:E8:A2:5C:62:68:D1:3D:94:90:5B:D7:CE:9A:18:C4

        X509v3 CRL Distribution Points:

            Full Name:

              URI:http://crl.microsoft.com/pki/crl/products/MicRooCerAut_2010-06-23.crl

        Authority Information Access:

            CA Issuers - URI:http://www.microsoft.com/pki/certs/MicRooCerAut_2010-06-23.crt

Signature Algorithm: sha256WithRSAEncryption

Signature Value:

    9f:c9:b6:ff:6e:e1:9c:3b:55:f6:fe:8b:39:dd:61:04:6f:d0:

    ad:63:cd:17:76:4a:a8:43:89:8d:f8:c6:f2:8c:5e:90:e1:e4:

    68:a5:15:ec:b8:d3:60:0c:40:57:1f:fb:5e:35:72:61:de:97:

    31:6c:79:a0:f5:16:ae:4b:1c:ed:01:0c:ef:f7:57:0f:42:30:

    18:69:f8:a1:a3:2e:97:92:b8:be:1b:fe:2b:86:5e:42:42:11:

    8f:8e:70:4d:90:a7:fd:01:63:f2:64:bf:9b:e2:7b:08:81:cf:

    49:f2:37:17:df:f1:f9:72:d3:c3:1d:c3:90:45:4d:e6:80:06:

    bd:fd:e5:6a:69:ce:b3:7e:4e:31:5b:84:73:a8:e8:72:3f:27:

    35:c9:7c:20:ce:00:9b:4f:e0:4c:b4:36:69:cb:f7:34:11:11:

    74:12:7a:a8:8c:2e:81:6c:a6:50:ad:19:fa:a8:46:45:6f:b1:

    67:73:c3:6b:e3:40:e8:2a:69:8f:24:10:e1:29:6e:8d:16:88:

    ee:8e:7f:66:93:02:6f:5b:9e:04:8c:cc:81:1c:ad:97:54:f1:

    18:2e:7e:52:90:bc:51:de:2a:0e:ae:66:ea:bc:64:6e:a0:91:

    64:e4:2f:12:a8:bc:e7:6b:ba:c7:1b:9b:79:1a:64:66:f1:43:

    b4:d1:c3:46:21:38:81:79:4c:fa:f0:31:0d:d3:79:ff:7a:12:

    a5:1d:d9:dd:ac:a2:0f:71:82:f7:93:ff:5c:a1:61:ae:65:f2:

    14:81:ed:79:5a:9a:87:ea:60:7b:cb:b3:4f:75:34:ca:ba:a1:

    ef:a2:f6:a2:80:45:a1:8b:27:81:cd:d5:77:38:3e:ca:4e:dd:

    28:ea:58:ba:c5:a0:29:de:86:8c:88:fc:95:27:51:dd:ab:d3:

    d0:5b:0d:77:c7:6c:8f:55:d7:d4:a2:0e:5b:e4:34:46:14:16:

    1d:e3:1c:d6:6d:99:ad:4c:ec:71:73:2f:ab:ce:b2:b4:29:de:

    55:30:53:39:3a:32:8b:f0:ea:9c:88:12:3b:05:68:19:bf:cf:

    87:52:10:fb:d6:13:60:f3:41:64:f4:08:57:81:cb:9d:11:a5:

    8e:f4:e5:27:f5:a3:3a:ec:e4:3d:4a:b7:ce:f9:88:0d:9f:bd:

    ca:6d:d2:4a:bc:58:76:8e:32:04:94:6e:dd:f4:cf:6d:47:6d:

    c2:d7:6a:dc:87:71:ea:a4:bf:ef:67:97:9c:b8:c7:80:36:2a:

    2a:59:c9:c0:0c:a7:44:a0:73:b5:8c:cf:38:5a:ae:f8:bb:86:

    95:f0:44:ad:66:7a:33:ed:71:e4:45:87:83:e5:a7:ce:a2:40:

    d0:72:d2:48:00:fa:f9:1a

-----BEGIN CERTIFICATE-----

MIIFqjCCA5KgAwIBAgITMwAAABqIi5gAViKEwQAAAAAAGjANBgkqhkiG9w0BAQsF

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-----END CERTIFICATE-----