backend

You can set keyless backend config in this section.

The backend config can be a root value map as described below, or just the driver name.

Root Value Map

dispatch_channel_size

optional, type: usize

Set the channel size for the dispatch of requests to worker backend.

This will only have effect when worker is enabled in main conf.

default: 1024

dispatch_counter_shift

optional, type: u8

Set the count of the requests that will be dispatched to the same worker backend before rotate to the next one.

The count value will be 2^N.

This will only have effect when worker is enabled in main conf.

default: 3

openssl_async_job

optional, type: openssl_async_job

Use OpenSSL Async Job driver.

default: not enabled

Drivers

simple

Use OpenSSL default mode for Private Key operations.

There is no extra config for this driver.

openssl_async_job

Use OpenSSL async job for Private Key operations. You can set the hardware crypto engine to use in openssl.cnf.

The following keys are supported for this driver:

• async_op_timeout

  optional, type: humanize duration

  Set the timeout for a single async job.

  It is recommended to set a large value to avoid use-after-free crash in OpenSSL Async Job code.

  default: 1s