root@sclrdev:/home/sclr/certs/FreshCerts# curl --ftp-ssl --verbose ftp://{abc}/ -u trup:trup --cacert /etc/ssl/certs/ca-certificates.crt
* About to connect() to {abc} port 21 (#0)
* Trying {abc}...
* Connected to {abc} ({abc}) port 21 (#0)
< 220-Cerberus FTP Server - Home Edition
< 220-This is the UNLICENSED Home Edition and may be used for home, personal use only
< 220-Welcome to Cerberus FTP Server
< 220 Created by Cerberus, LLC
> AUTH SSL
< 234 Authentication method accepted
* successfully set certificate verify locations:
* CAfile: /etc/ssl/certs/ca-certificates.crt
CApath: /etc/ssl/certs
* SSLv3, TLS handshake, Client hello (1):
* SSLv3, TLS handshake, Server hello (2):
* SSLv3, TLS handshake, CERT (11):
* SSLv3, TLS alert, Server hello (2):
* SSL certificate problem: unable to get local issuer certificate
* Closing connection 0
curl: (60) SSL certificate problem: unable to get local issuer certificate
More details here: http://curl.haxx.se/docs/sslcerts.html
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.
当前回答
我本想评论Yuvik的回答，但我缺乏足够的声誉点。
当您将.crt文件导入到/usr/share/local/ca-certificates时，需要使用正确的格式。其中一些已经在前面提到过，但是还没有人提到只需要一个新的行字符，也没有人收集过清单，所以我想在这里提供一个清单。
The certificate needs to end in .crt. From Ubuntu's man page: Certificates must have a .crt extension in order to be included by update-ca-certificates Certificate files in /usr/local/share/ca-certificates can only contain one certificate Certificate files must end in a newline. update-ca-certificates will appear to work if each row contains, for example, a carriage return + a newline (as is standard in Windows), but once the certificate is appended to /etc/ssl/ca-certificates.crt, it still will not work. This specific requirement bit me as we're loading certificates from an external source.
其他回答
没有一个答案提到，可能是连接到内部vpn的角色，我以前遇到过这个问题，并要求在专用网络上
由于conda环境，一些系统可能存在此问题。如果你安装了conda，那么禁用它可以解决你的问题。在我的情况下，当我停用conda时，这个curl-SSL错误得到了解决。在ubuntu或MacOS上试试这个命令
conda deactivate
我本想评论Yuvik的回答，但我缺乏足够的声誉点。
当您将.crt文件导入到/usr/share/local/ca-certificates时，需要使用正确的格式。其中一些已经在前面提到过，但是还没有人提到只需要一个新的行字符，也没有人收集过清单，所以我想在这里提供一个清单。
The certificate needs to end in .crt. From Ubuntu's man page: Certificates must have a .crt extension in order to be included by update-ca-certificates Certificate files in /usr/local/share/ca-certificates can only contain one certificate Certificate files must end in a newline. update-ca-certificates will appear to work if each row contains, for example, a carriage return + a newline (as is standard in Windows), but once the certificate is appended to /etc/ssl/ca-certificates.crt, it still will not work. This specific requirement bit me as we're loading certificates from an external source.
以我为例，在我试图用cURL使用的服务上安装我的证书时出现了问题。我未能将中间证书和根证书捆绑/连接到我的域证书。一开始并没有明显的问题，因为Chrome解决了这个问题并接受了证书，尽管省略了中间证书和根证书。
在捆绑证书之后，一切都按预期工作。我捆扎成这样
$ cat intermediate.crt >> domain.crt
并对所有中间证书和根证书重复。
在亚马逊Linux (CentOS / Red Hat等)上，我做了以下工作来解决这个问题。首先复制cacert。Pem从http://curl.haxx.se/ca/cacert.pem下载，放在/etc/pki/ca-trust/source/anchors/目录下。执行update-ca-trust命令。
下面是来自https://serverfault.com/questions/394815/how-to-update-curl-ca-bundle-on-redhat的一句话
Curl https://curl.se/ca/cacert.pem -o /etc/pki/ca-trust/source/anchors/curl-cacert-updated。Pem && update-ca-trust
然而，由于curl被破坏，我实际上使用这个命令来下载cacert。pem文件。
Wget——no-check-certificate http://curl.haxx.se/ca/cacert.pem
另外，如果你在使用php时遇到了问题，你可能需要重新启动你的web服务器服务httpd restart for apache或service nginx restart for nginx。
推荐文章
- HTTPS和SSL3_GET_SERVER_CERTIFICATE:证书验证失败，CA is OK
- c#忽略证书错误?
- 如何允许本地主机上的Apache使用HTTPS ?
- 如何在Node.js内进行远程REST调用?旋度吗?
- 配置Git接受特定https远程的特定自签名服务器证书
- CMake无法找到OpenSSL库
- 如何为已安装的Ubuntu LAMP堆栈启用cURL ?
- 从PKCS12文件中提取公钥/私钥，供以后在SSH-PK-Authentication中使用
- PHP获取网站URL协议- http vs https
- 为什么cURL返回错误“(23)Failed writing body”?
- 如何POST JSON数据与PHP卷曲?
- 使用curl在PHP中获取HTTP代码
- SSL握手警告:unrecognized_name错误，因为升级到Java 1.7.0
- SSL证书错误:无法获得本地颁发者证书
- "ERROR:root:code for hash md5 was not found"当使用任何hg mercurial命令时
