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Enable use of Cyclone DDS security features

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Add utility function to insert security settings to the cyclone QOS
object used to create nodes.  Include a utility to find security
files and properly format their location to use with DDS.

Signed-off-by: Sid Faber <sid.faber@canonical.com>
This commit is contained in:
Sid Faber 2020-03-05 21:08:26 +00:00
parent 025762ac4f
commit 99d2738a84
2 changed files with 95 additions and 4 deletions
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94
rmw_cyclonedds_cpp/src/rmw_node.cpp
View file

@ -26,9 +26,11 @@
#include <utility>
#include <regex>
#include "rcutils/filesystem.h"
#include "rcutils/get_env.h"
#include "rcutils/logging_macros.h"
#include "rcutils/strdup.h"
#include "rcutils/format_string.h"
#include "rmw/allocators.h"
#include "rmw/convert_rcutils_ret_to_rmw_ret.h"
@ -642,6 +644,80 @@ static std::string get_node_user_data(const char * node_name, const char * node_
std::string(";");
}
/* Returns the full URI of a security file properly formatted for DDS */
char * get_security_file_URI(
const char * security_filename, const char * node_secure_root,
const rcutils_allocator_t allocator)
{
char * ret;
char * file_path = rcutils_join_path(node_secure_root, security_filename, allocator);
if (file_path == nullptr) {
ret = nullptr;
} else if (!rcutils_is_readable(file_path)) {
RCUTILS_LOG_ERROR_NAMED(
"rmw_cyclonedds_cpp", "get_security_file: %s not found", file_path);
ret = nullptr;
allocator.deallocate(file_path, allocator.state);
} else {
/* Cyclone also supports a "data:" URI */
ret = rcutils_format_string(allocator, "file:%s", file_path);
allocator.deallocate(file_path, allocator.state);
}
return ret;
}
void store_security_filepath_in_qos(
dds_qos_t * qos, const char * qos_property_name, const char * file_name,
const rmw_node_security_options_t * security_options)
{
rcutils_allocator_t allocator = rcutils_get_default_allocator();
char * security_file_path = get_security_file_URI(
file_name, security_options->security_root_path, allocator);
if (security_file_path != nullptr) {
dds_qset_prop(qos, qos_property_name, security_file_path);
allocator.deallocate(security_file_path, allocator.state);
}
}
/* Set all the qos properties needed to enable DDS security */
void configure_qos_for_security(
dds_qos_t * qos, const rmw_node_security_options_t * security_options)
{
/* File path is set to nullptr if file does not exist or is not readable */
store_security_filepath_in_qos(
qos, "dds.sec.auth.identity_ca", "identity_ca.cert.pem",
security_options);
store_security_filepath_in_qos(
qos, "dds.sec.auth.identity_certificate", "cert.pem",
security_options);
store_security_filepath_in_qos(
qos, "dds.sec.auth.private_key", "key.pem",
security_options);
store_security_filepath_in_qos(
qos, "dds.sec.access.permissions_ca", "permissions_ca.cert.pem",
security_options);
store_security_filepath_in_qos(
qos, "dds.sec.access.governance", "governance.p7s",
security_options);
store_security_filepath_in_qos(
qos, "dds.sec.access.permissions", "permissions.p7s",
security_options);
dds_qset_prop(qos, "dds.sec.auth.library.path", "libdds_security_auth.so");
dds_qset_prop(qos, "dds.sec.auth.library.init", "init_authentication");
dds_qset_prop(qos, "dds.sec.auth.library.finalize", "finalize_authentication");
dds_qset_prop(qos, "dds.sec.crypto.library.path", "libdds_security_crypto.so");
dds_qset_prop(qos, "dds.sec.crypto.library.init", "init_crypto");
dds_qset_prop(qos, "dds.sec.crypto.library.finalize", "finalize_crypto");
dds_qset_prop(qos, "dds.sec.access.library.path", "libdds_security_ac.so");
dds_qset_prop(qos, "dds.sec.access.library.init", "init_access_control");
dds_qset_prop(qos, "dds.sec.access.library.finalize", "finalize_access_control");
}
extern "C" rmw_node_t * rmw_create_node(
rmw_context_t * context, const char * name,
const char * namespace_, size_t domain_id,
@ -666,7 +742,13 @@ extern "C" rmw_node_t * rmw_create_node(
static_cast<void>(domain_id);
const dds_domainid_t did = DDS_DOMAIN_DEFAULT;
#endif
(void) security_options;
if (security_options == nullptr) {
RCUTILS_LOG_ERROR_NAMED(
"rmw_cyclonedds_cpp", "rmw_create_node: security options null");
return nullptr;
}
rmw_ret_t ret;
int dummy_validation_result;
size_t dummy_invalid_index;
@ -688,8 +770,18 @@ extern "C" rmw_node_t * rmw_create_node(
#endif
dds_qos_t * qos = dds_create_qos();
if (qos == nullptr) {
RCUTILS_LOG_ERROR_NAMED(
"rmw_cyclonedds_cpp", "rmw_create_node: Unable to create qos");
return nullptr;
}
std::string user_data = get_node_user_data(name, namespace_);
dds_qset_userdata(qos, user_data.c_str(), user_data.size());
if (security_options->enforce_security) {
configure_qos_for_security(qos, security_options);
}
dds_entity_t pp = dds_create_participant(did, qos, nullptr);
dds_delete_qos(qos);
if (pp < 0) {