Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            17:fd:91:4b:88:02:6b:6c:33:fa:fa:d1:ba:ad:86:cd:5e:79:5f:a9
        Signature Algorithm: ecdsa-with-SHA512
        Issuer: C=CZ/2.5.4.97=NTRCZ-47114983, O=Česká pošta, s.p., CN=PostSignum Root QCA ECC R1
        Validity
            Not Before: Jun 29 08:11:35 2023 GMT
            Not After : Jun 29 08:11:35 2038 GMT
        Subject: C=CZ/2.5.4.97=NTRCZ-47114983, O=Česká pošta, s.p., CN=PostSignum Root QCA ECC R1
        Subject Public Key Info:
            Public Key Algorithm: id-ecPublicKey
            EC Public Key:
                pub: 
                    04:00:8f:1e:72:6c:c9:80:c7:8a:d0:a9:94:0a:cb:
                    32:63:09:1f:be:a3:bb:7e:ef:bb:81:c0:47:18:ba:
                    f4:76:4b:14:43:12:07:76:1c:12:1a:d8:31:34:55:
                    cb:5b:bc:40:6d:38:64:41:41:b0:ce:ae:f6:fa:16:
                    4b:4e:fa:bf:f2:ce:84:01:72:80:63:47:39:41:10:
                    ca:b1:a5:ff:b4:c0:f1:0f:57:76:8b:13:df:15:88:
                    a7:bd:0e:fc:b2:2f:29:d5:5e:ee:1f:89:d5:75:91:
                    f9:a5:9b:fe:78:c2:2d:8e:67:4f:59:54:53:8e:d2:
                    ec:cd:a5:5a:33:12:ca:1a:44:0e:4a:d6:9d
                ASN1 OID: secp521r1
        X509v3 extensions:
            X509v3 Basic Constraints: critical
                CA:TRUE
            X509v3 Key Usage: critical
                Certificate Sign, CRL Sign
            X509v3 Authority Key Identifier: 
                keyid:AA:25:8E:DA:27:C8:54:8C:DE:6D:29:AE:D0:D9:AB:BF:7C:76:75:86

            X509v3 Subject Key Identifier: 
                AA:25:8E:DA:27:C8:54:8C:DE:6D:29:AE:D0:D9:AB:BF:7C:76:75:86
    Signature Algorithm: ecdsa-with-SHA512
        30:81:87:02:41:76:5b:2e:c4:00:85:9f:a5:80:7f:f6:5a:02:
        dd:b9:e7:39:94:76:a5:d1:7d:74:5c:59:00:51:c5:cc:72:48:
        9b:73:88:73:49:c4:11:40:f2:3c:69:7c:9d:24:61:11:d6:c1:
        db:d7:22:b8:e1:5e:88:29:70:e4:63:83:8a:d7:fd:35:02:42:
        01:86:6d:4d:97:6e:d6:0a:13:cc:14:09:b6:df:2e:ea:91:94:
        b0:72:4d:a3:8e:65:dc:94:4b:10:bd:0f:30:3c:6c:da:d0:d8:
        dd:21:14:78:3a:58:74:b1:30:34:a1:ff:51:83:39:82:f1:91:
        02:4b:32:54:f4:31:36:c8:1d:76:a9:4a