curl performs SSL certificate verification by default, using a "bundle" of Certificate Authority (CA) public keys (CA certs). If the default bundle file isn't adequate, you can specify an alternate file using the --cacert option. If this HTTPS server uses a certificate signed by a CA represented in the bundle, the certificate verification probably failed due to a problem with the certificate (it might be expired, or the name might not match the domain name in the URL). If you'd like to turn off curl's verification of the certificate, use the -k (or --insecure) option.

您的问题似乎是关于curl命令的SSL证书验证问题。是的，curl命令默认使用一组证书颁发机构（CA）公钥（CA证书）执行SSL证书验证。如果默认的证书不够用，您可以使用--cacert选项指定替代文件。如果此HTTPS服务器使用由证书颁发机构签名的证书，那么证书验证可能失败，原因可能是证书过期或名称与URL中的域名不匹配。如果您想关闭curl对证书的验证，可以使用-k（或--insecure）选项。

相关问题

git SSL certificate problem: unable to get local issuer certificate

This error usually occurs when Git is unable to verify the authenticity of the SSL certificate provided by the remote repository. It could be due to a missing or incorrect SSL certificate configuration on your system.

To resolve this issue, you can try the following steps:

1. Update Git: Make sure you have the latest version of Git installed on your system. You can check the version by running `git --version` in the command line. If you have an older version, consider upgrading to the latest stable release.

2. Verify SSL Certificate Bundle: Git uses a bundle of trusted SSL certificates to verify the authenticity of remote servers. Check if your Git installation has a valid certificate bundle. By default, Git looks for certificates in one of the following locations:

- Mac/Linux: `/etc/ssl/certs/ca-certificates.crt`
- Windows (MSYS/Git Bash): `mingw64\ssl\certs\ca-bundle.crt`

If the certificate bundle is missing or outdated, you can obtain a new one from the curl website (https://curl.haxx.se/docs/caextract.html) and save it to the appropriate location.

3. Configure Git to use the certificate bundle: If the certificate bundle is not located in the default location, you can configure Git to use a specific certificate bundle file by running the following command:

   git config --global http.sslCAInfo /path/to/certificate-bundle.crt

Replace `/path/to/certificate-bundle.crt` with the actual path to the certificate bundle file.

4. Disable SSL verification (not recommended): If you're in a development environment or trust the remote repository, you can temporarily disable SSL verification by running the following command:

   git config --global http.sslVerify false

Note that this is not recommended for production environments or when working with untrusted repositories.

Try these steps and see if it resolves the SSL certificate problem in Git. If the issue persists, please provide more details about your operating system, Git version, and any specific error messages you're encountering for further assistance.