diff options
Diffstat (limited to 'src/core/ext/transport/chttp2/client/secure/secure_channel_create.c')
| -rw-r--r-- | src/core/ext/transport/chttp2/client/secure/secure_channel_create.c | 171 |
1 files changed, 128 insertions, 43 deletions
diff --git a/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c b/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c index d3e53984f2..d8c18eb122 100644 --- a/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c +++ b/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c @@ -40,10 +40,15 @@ #include "src/core/ext/client_channel/client_channel.h" #include "src/core/ext/client_channel/resolver_registry.h" +#include "src/core/ext/client_channel/uri_parser.h" #include "src/core/ext/transport/chttp2/client/chttp2_connector.h" #include "src/core/lib/channel/channel_args.h" +#include "src/core/lib/iomgr/sockaddr_utils.h" #include "src/core/lib/security/credentials/credentials.h" +#include "src/core/lib/security/transport/lb_targets_info.h" #include "src/core/lib/security/transport/security_connector.h" +#include "src/core/lib/slice/slice_hash_table.h" +#include "src/core/lib/slice/slice_internal.h" #include "src/core/lib/surface/api_trace.h" #include "src/core/lib/surface/channel.h" @@ -53,12 +58,114 @@ static void client_channel_factory_ref( static void client_channel_factory_unref( grpc_exec_ctx *exec_ctx, grpc_client_channel_factory *cc_factory) {} +static grpc_subchannel_args *get_secure_naming_subchannel_args( + grpc_exec_ctx *exec_ctx, const grpc_subchannel_args *args) { + grpc_channel_credentials *channel_credentials = + grpc_channel_credentials_find_in_args(args->args); + if (channel_credentials == NULL) { + gpr_log(GPR_ERROR, + "Can't create subchannel: channel credentials missing for secure " + "channel."); + return NULL; + } + // Make sure security connector does not already exist in args. + if (grpc_security_connector_find_in_args(args->args) != NULL) { + gpr_log(GPR_ERROR, + "Can't create subchannel: security connector already present in " + "channel args."); + return NULL; + } + // To which address are we connecting? By default, use the server URI. + const grpc_arg *server_uri_arg = + grpc_channel_args_find(args->args, GRPC_ARG_SERVER_URI); + GPR_ASSERT(server_uri_arg != NULL); + GPR_ASSERT(server_uri_arg->type == GRPC_ARG_STRING); + const char *server_uri_str = server_uri_arg->value.string; + GPR_ASSERT(server_uri_str != NULL); + grpc_uri *server_uri = + grpc_uri_parse(server_uri_str, true /* supress errors */); + GPR_ASSERT(server_uri != NULL); + const char *server_uri_path; + server_uri_path = + server_uri->path[0] == '/' ? server_uri->path + 1 : server_uri->path; + const grpc_slice_hash_table *targets_info = + grpc_lb_targets_info_find_in_args(args->args); + char *target_name_to_check = NULL; + if (targets_info != NULL) { // LB channel + // Find the balancer name for the target. + const char *target_uri_str = + grpc_get_subchannel_address_uri_arg(args->args); + grpc_uri *target_uri = + grpc_uri_parse(target_uri_str, false /* suppress errors */); + GPR_ASSERT(target_uri != NULL); + if (target_uri->path[0] != '\0') { // "path" may be empty + const grpc_slice key = grpc_slice_from_static_string( + target_uri->path[0] == '/' ? target_uri->path + 1 : target_uri->path); + const char *value = grpc_slice_hash_table_get(targets_info, key); + if (value != NULL) target_name_to_check = gpr_strdup(value); + grpc_slice_unref_internal(exec_ctx, key); + } + if (target_name_to_check == NULL) { + // If the target name to check hasn't already been set, fall back to using + // SERVER_URI + target_name_to_check = gpr_strdup(server_uri_path); + } + grpc_uri_destroy(target_uri); + } else { // regular channel: the secure name is the original server URI. + target_name_to_check = gpr_strdup(server_uri_path); + } + grpc_uri_destroy(server_uri); + GPR_ASSERT(target_name_to_check != NULL); + grpc_channel_security_connector *subchannel_security_connector = NULL; + // Create the security connector using the credentials and target name. + grpc_channel_args *new_args_from_connector = NULL; + const grpc_security_status security_status = + grpc_channel_credentials_create_security_connector( + exec_ctx, channel_credentials, target_name_to_check, args->args, + &subchannel_security_connector, &new_args_from_connector); + if (security_status != GRPC_SECURITY_OK) { + gpr_log(GPR_ERROR, + "Failed to create secure subchannel for secure name '%s'", + target_name_to_check); + gpr_free(target_name_to_check); + return NULL; + } + gpr_free(target_name_to_check); + grpc_arg new_security_connector_arg = + grpc_security_connector_to_arg(&subchannel_security_connector->base); + + grpc_channel_args *new_args = grpc_channel_args_copy_and_add( + new_args_from_connector != NULL ? new_args_from_connector : args->args, + &new_security_connector_arg, 1); + GRPC_SECURITY_CONNECTOR_UNREF(exec_ctx, &subchannel_security_connector->base, + "lb_channel_create"); + if (new_args_from_connector != NULL) { + grpc_channel_args_destroy(exec_ctx, new_args_from_connector); + } + grpc_subchannel_args *final_sc_args = gpr_malloc(sizeof(*final_sc_args)); + memcpy(final_sc_args, args, sizeof(*args)); + final_sc_args->args = new_args; + return final_sc_args; +} + static grpc_subchannel *client_channel_factory_create_subchannel( grpc_exec_ctx *exec_ctx, grpc_client_channel_factory *cc_factory, const grpc_subchannel_args *args) { + grpc_subchannel_args *subchannel_args = + get_secure_naming_subchannel_args(exec_ctx, args); + if (subchannel_args == NULL) { + gpr_log( + GPR_ERROR, + "Failed to create subchannel arguments during subchannel creation."); + return NULL; + } grpc_connector *connector = grpc_chttp2_connector_create(); - grpc_subchannel *s = grpc_subchannel_create(exec_ctx, connector, args); + grpc_subchannel *s = + grpc_subchannel_create(exec_ctx, connector, subchannel_args); grpc_connector_unref(exec_ctx, connector); + grpc_channel_args_destroy(exec_ctx, + (grpc_channel_args *)subchannel_args->args); + gpr_free(subchannel_args); return s; } @@ -91,10 +198,10 @@ static const grpc_client_channel_factory_vtable client_channel_factory_vtable = static grpc_client_channel_factory client_channel_factory = { &client_channel_factory_vtable}; -/* Create a secure client channel: - Asynchronously: - resolve target - - connect to it (trying alternatives as presented) - - perform handshakes */ +// Create a secure client channel: +// Asynchronously: - resolve target +// - connect to it (trying alternatives as presented) +// - perform handshakes grpc_channel *grpc_secure_channel_create(grpc_channel_credentials *creds, const char *target, const grpc_channel_args *args, @@ -103,47 +210,25 @@ grpc_channel *grpc_secure_channel_create(grpc_channel_credentials *creds, GRPC_API_TRACE( "grpc_secure_channel_create(creds=%p, target=%s, args=%p, " "reserved=%p)", - 4, (creds, target, args, reserved)); + 4, ((void *)creds, target, (void *)args, (void *)reserved)); GPR_ASSERT(reserved == NULL); - // Make sure security connector does not already exist in args. - if (grpc_find_security_connector_in_args(args) != NULL) { - gpr_log(GPR_ERROR, "Cannot set security context in channel args."); + grpc_channel *channel = NULL; + if (creds != NULL) { + // Add channel args containing the client channel factory and channel + // credentials. + grpc_arg args_to_add[] = { + grpc_client_channel_factory_create_channel_arg(&client_channel_factory), + grpc_channel_credentials_to_arg(creds)}; + grpc_channel_args *new_args = grpc_channel_args_copy_and_add( + args, args_to_add, GPR_ARRAY_SIZE(args_to_add)); + // Create channel. + channel = client_channel_factory_create_channel( + &exec_ctx, &client_channel_factory, target, + GRPC_CLIENT_CHANNEL_TYPE_REGULAR, new_args); + // Clean up. + grpc_channel_args_destroy(&exec_ctx, new_args); grpc_exec_ctx_finish(&exec_ctx); - return grpc_lame_client_channel_create( - target, GRPC_STATUS_INTERNAL, - "Security connector exists in channel args."); - } - // Create security connector and construct new channel args. - grpc_channel_security_connector *security_connector; - grpc_channel_args *new_args_from_connector; - if (grpc_channel_credentials_create_security_connector( - &exec_ctx, creds, target, args, &security_connector, - &new_args_from_connector) != GRPC_SECURITY_OK) { - grpc_exec_ctx_finish(&exec_ctx); - return grpc_lame_client_channel_create( - target, GRPC_STATUS_INTERNAL, "Failed to create security connector."); - } - // Add channel args containing the client channel factory and security - // connector. - grpc_arg args_to_add[2]; - args_to_add[0] = - grpc_client_channel_factory_create_channel_arg(&client_channel_factory); - args_to_add[1] = grpc_security_connector_to_arg(&security_connector->base); - grpc_channel_args *new_args = grpc_channel_args_copy_and_add( - new_args_from_connector != NULL ? new_args_from_connector : args, - args_to_add, GPR_ARRAY_SIZE(args_to_add)); - if (new_args_from_connector != NULL) { - grpc_channel_args_destroy(&exec_ctx, new_args_from_connector); } - // Create channel. - grpc_channel *channel = client_channel_factory_create_channel( - &exec_ctx, &client_channel_factory, target, - GRPC_CLIENT_CHANNEL_TYPE_REGULAR, new_args); - // Clean up. - GRPC_SECURITY_CONNECTOR_UNREF(&exec_ctx, &security_connector->base, - "secure_client_channel_factory_create_channel"); - grpc_channel_args_destroy(&exec_ctx, new_args); - grpc_exec_ctx_finish(&exec_ctx); return channel != NULL ? channel : grpc_lame_client_channel_create( target, GRPC_STATUS_INTERNAL, |