The following functions can be used to set and retrieve the configuration of the crypto engines of a specific context. The default can also be retrieved without any particular context. See Engine Information. The default can also be changed globally. See Engine Configuration.
gpgme_ctx_get_engine_info returns a linked list of
engine info structures. Each info structure describes the
configuration of one configured backend, as used by the context
The result is valid until the next invocation of
gpgme_ctx_set_engine_info for this particular context.
This function can not fail.
gpgme_ctx_set_engine_info changes the
configuration of the crypto engine implementing the protocol
proto for the context ctx.
file_name is the file name of the executable program
implementing this protocol, and home_dir is the directory name
of the configuration directory for this crypto engine. If
NULL, the engine’s default will be used.
Currently this function must be used before starting the first crypto operation. It is unspecified if and when the changes will take effect if the function is called after starting the first operation on the context ctx.
This function returns the error code
successful, or an error code on failure.