署名なしサーバ証明書を作ってみる

署名値が空のサーバ証明書を作ってみる。

具体的にはこういうの

$ openssl x509 -text -noout -in ./example.der 

Certificate:
    Data:
        Version: 1 (0x0)
        Serial Number:
            7a:c4:cb:58:be:04:4b:96:c5:d6:1e:13:6c:d9:00:a8:4b:e7:c3:db
        Signature Algorithm: sha256WithRSAEncryption
        Issuer: C = jp, ST = Some-State, O = " ", CN = example.com
        Validity
            Not Before: May 18 08:35:56 2025 GMT
            Not After : May 16 08:35:56 2035 GMT
        Subject: C = jp, ST = Some-State, O = " ", CN = example.com
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                Public-Key: (2048 bit)
                Modulus: (略)
                Exponent: 65537 (0x10001)
    Signature Algorithm: sha256WithRSAEncryption
    Signature Value:

証明書エラーはでるが、ブラウザとも通信は出来る模様