如何使用 OpenSSL 获取 TLS 证书的域名 (SAN)

使用以下命令从任何 SSL 证书文件（此示例中为 cert.pem）以人类可读形式提取 X509 主题备用名称：

openssl_show_san.sh

openssl x509 -in cert.pem -noout -text | grep "Subject Alternative Name" --after=1

openssl x509 -in cert.pem -noout -text | grep "Subject Alternative Name" --after=1

openssl_san_example.txt

X509v3 Subject Alternative Name:
    DNS:*.techoverflow.net, DNS:techoverflow.net

X509v3 Subject Alternative Name:
    DNS:*.techoverflow.net, DNS:techoverflow.net

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