Because the generation and signing of SSL certificates takes time Squid can use this helper as an external process to handle the work. Communication occurs via TCP sockets bound to the loopback interface. This helper can use a disk cache of certificates to improve response times on repeated requests. It can also operate without a cache, generating new certificates on every request.
SSL errors after changing the CA
Certificates are stored in this database in signed form. After any change to the signing CA in squid.conf be sure to erase and reinitialize the certificate database.
The versions 1.0 to 1.1 of this helper will not add chained intermediate CA certificates. The client must have a full chain of trust from the root CA all the way down to the end certificate generated by this program. Signing with an intermediate CA needs to install both the root and the intermediate public CA on the clients.
Before this helper can be used with disk storage, the storage area for new certificates must be initialized manually. This is done from the command line using the -c parameter.
Certificates are stored in this database in signed form. After any change to the signing CA in squid.conf be sure to erase and re-initialize the certificate database.
For simple configuration the helper defaults can be used. Only HTTP listening port options are required to enable generation and set the signing CA certificate.
For more customized configuration, the helper certificate storage directory location and size can be altered with the sslcrtd_program configuration directive. The number of helper processes running can be configured with the and ssl_crtd_children configuration directive.
To operate without disk storage, the helper should be configured explicitly without the -s and -M parameters.
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