Openssl x509 - 인증서 정보 출력

Openssl x509 명령어를 통해 인증서 정보를 출력 할수 있음.

 

openssl x509 -in 파일명 -inform 파일 포멧 형태 -text

 

• 명령어 입출력 샘플

//DER 포멧 dwarfHan.der 인증서 파일을 텍스트로 출력함

openssl x509 -in dwarfHan.der -inform DER -text

Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number: 1 (0x1)
        Signature Algorithm: ecdsa-with-SHA256
        Issuer: C = KR, CN = HAN, O = DWARF HAN, OU = DWARF HAN, DC = HAN
        Validity
            Not Before: Sep 19 12:06:39 2022 GMT
            Not After : Sep 19 12:06:39 2062 GMT
        Subject: C = KR, CN = HAN, O = DWARF HAN, OU = DWARF HAN, DC = HAN
        Subject Public Key Info:
            Public Key Algorithm: id-ecPublicKey
                Public-Key: (256 bit)
                pub:
                    04:c7:41:98:61:30:46:15:00:eb:cc:14:f9:fa:dd:
                    d5:23:bd:c5:d0:91:8c:42:52:4c:bf:63:5a:a7:27:
                    e7:04:ae:c1:ae:9d:30:79:f0:b6:8f:5f:bd:5b:76:
                    96:54:06:50:11:2d:de:4c:62:cd:31:73:35:84:9b:
                    27:1c:a1:54:b1
                ASN1 OID: prime256v1
                NIST CURVE: P-256
        X509v3 extensions:
            X509v3 Subject Key Identifier:
                A2:82:F5:A7:6A:21:85:0A:67:E8:EC:46:F5:32:AC:5A:BE:D0:8D:EA
            X509v3 Authority Key Identifier:
                keyid:A2:82:F5:A7:6A:21:85:0A:67:E8:EC:46:F5:32:AC:5A:BE:D0:8D:EA

            X509v3 Basic Constraints:
                CA:TRUE, pathlen:0
            X509v3 Key Usage: critical
                Certificate Sign, CRL Sign
    Signature Algorithm: ecdsa-with-SHA256
         30:45:02:21:00:da:c2:d4:8f:9f:82:70:35:8f:c1:6d:3f:93:
         0e:f3:d1:78:40:d7:4f:5c:04:ee:f3:1f:35:54:62:be:5d:40:
         4b:02:20:50:20:51:e4:f3:57:10:ad:df:8a:ac:77:6b:a9:13:
         11:95:73:8d:49:39:e8:10:c6:58:a1:68:91:98:e6:cb:28
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----