# Copyright (c) 2024 Cisco and/or its affiliates. # Copyright (c) 2024 PANTHEON.tech s.r.o. # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at: # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """IPsec utilities library.""" from enum import Enum, IntEnum from io import open from ipaddress import ip_network, ip_address from random import choice from string import ascii_letters from robot.libraries.BuiltIn import BuiltIn from resources.libraries.python.Constants import Constants from resources.libraries.python.IncrementUtil import ObjIncrement from resources.libraries.python.InterfaceUtil import ( InterfaceUtil, InterfaceStatusFlags, ) from resources.libraries.python.IPAddress import IPAddress from resources.libraries.python.IPUtil import ( IPUtil, IpDscp, MPLS_LABEL_INVALID, NetworkIncrement, ) from resources.libraries.python.PapiExecutor import PapiSocketExecutor from resources.libraries.python.ssh import scp_node from resources.libraries.python.topology import Topology, NodeType from resources.libraries.python.VPPUtil import VPPUtil from resources.libraries.python.FlowUtil import FlowUtil IPSEC_UDP_PORT_DEFAULT = 4500 IPSEC_REPLAY_WINDOW_DEFAULT = 64 def gen_key(length): """Generate random string as a key. :param length: Length of generated payload. :type length: int :returns: The generated payload. :rtype: bytes """ return "".join(choice(ascii_letters) for _ in range(length)).encode( encoding="utf-8" ) class PolicyAction(Enum): """Policy actions.""" BYPASS = ("bypass", 0) DISCARD = ("discard", 1) PROTECT = ("protect", 3) def __init__(self, policy_name, policy_int_repr): self.policy_name = policy_name self.policy_int_repr = policy_int_repr def __str__(self): return self.policy_name def __int__(self): return self.policy_int_repr class CryptoAlg(Enum): """Encryption algorithms.""" AES_CBC_128 = ("aes-cbc-128", 1, "AES-CBC", 16) AES_CBC_256 = ("aes-cbc-256", 3, "AES-CBC", 32) AES_GCM_128 = ("aes-gcm-128", 7, "AES-GCM", 16) AES_GCM_256 = ("aes-gcm-256", 9, "AES-GCM", 32) def __init__(self, alg_name, alg_int_repr, scapy_name, key_len): self.alg_name = alg_name self.alg_int_repr = alg_int_repr self.scapy_name = scapy_name self.key_len = key_len class IntegAlg(Enum): """Integrity algorithm.""" SHA_256_128 = ("sha-256-128", 4, "SHA2-256-128", 32) SHA_512_256 = ("sha-512-256", 6, "SHA2-512-256", 64) def __init__(self, alg_name, alg_int_repr, scapy_name, key_len): self.alg_name = alg_name self.alg_int_repr = alg_int_repr self.scapy_name = scapy_name self.key_len = key_len class IPsecProto(IntEnum): """IPsec protocol.""" IPSEC_API_PROTO_ESP = 50 IPSEC_API_PROTO_AH = 51 class IPsecSadFlags(IntEnum): """IPsec Security Association Database flags.""" IPSEC_API_SAD_FLAG_NONE = 0 # Enable extended sequence numbers IPSEC_API_SAD_FLAG_USE_ESN = 0x01 # Enable Anti - replay IPSEC_API_SAD_FLAG_USE_ANTI_REPLAY = 0x02 # IPsec tunnel mode if non-zero, else transport mode IPSEC_API_SAD_FLAG_IS_TUNNEL = 0x04 # IPsec tunnel mode is IPv6 if non-zero, else IPv4 tunnel # only valid if is_tunnel is non-zero IPSEC_API_SAD_FLAG_IS_TUNNEL_V6 = 0x08 # Enable UDP encapsulation for NAT traversal IPSEC_API_SAD_FLAG_UDP_ENCAP = 0x10 # IPsec SA is or inbound traffic IPSEC_API_SAD_FLAG_IS_INBOUND = 0x40 class TunnelEncpaDecapFlags(IntEnum): """Flags controlling tunnel behaviour.""" TUNNEL_API_ENCAP_DECAP_FLAG_NONE = 0 # at encap, copy the DF bit of the payload into the tunnel header TUNNEL_API_ENCAP_DECAP_FLAG_ENCAP_COPY_DF = 1 # at encap, set the DF bit in the tunnel header TUNNEL_API_ENCAP_DECAP_FLAG_ENCAP_SET_DF = 2 # at encap, copy the DSCP bits of the payload into the tunnel header TUNNEL_API_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP = 4 # at encap, copy the ECN bit of the payload into the tunnel header TUNNEL_API_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN = 8 # at decap, copy the ECN bit of the tunnel header into the payload TUNNEL_API_ENCAP_DECAP_FLAG_ENCAP_SET_ECN = 16 class TunnelMode(IntEnum): """Tunnel modes.""" # point-to-point TUNNEL_API_MODE_P2P = 0 # multi-point TUNNEL_API_MODE_MP = 1 class IPsecUtil: """IPsec utilities.""" @staticmethod def policy_action_bypass(): """Return policy action bypass. :returns: PolicyAction enum BYPASS object. :rtype: PolicyAction """ return PolicyAction.BYPASS @staticmethod def policy_action_discard(): """Return policy action discard. :returns: PolicyAction enum DISCARD object. :rtype: PolicyAction """ return PolicyAction.DISCARD @staticmethod def policy_action_protect(): """Return policy action protect. :returns: PolicyAction enum PROTECT object. :rtype: PolicyAction """ return PolicyAction.PROTECT @staticmethod def crypto_alg_aes_cbc_128(): """Return encryption algorithm aes-cbc-128. :returns: CryptoAlg enum AES_CBC_128 object. :rtype: CryptoAlg """ return CryptoAlg.AES_CBC_128 @staticmethod def crypto_alg_aes_cbc_256(): """Return encryption algorithm aes-cbc-256. :returns: CryptoAlg enum AES_CBC_256 object. :rtype: CryptoAlg """ return CryptoAlg.AES_CBC_256 @staticmethod def crypto_alg_aes_gcm_128(): """Return encryption algorithm aes-gcm-128. :returns: CryptoAlg enum AES_GCM_128 object. :rtype: CryptoAlg """ return CryptoAlg.AES_GCM_128 @staticmethod def crypto_alg_aes_gcm_256(): """Return encryption algorithm aes-gcm-256. :returns: CryptoAlg enum AES_GCM_128 object. :rtype: CryptoAlg """ return CryptoAlg.AES_GCM_256 @staticmethod def get_crypto_alg_key_len(crypto_alg): """Return encryption algorithm key length. :param crypto_alg: Encryption algorithm. :type crypto_alg: CryptoAlg :returns: Key length. :rtype: int """ return crypto_alg.key_len @staticmethod def get_crypto_alg_scapy_name(crypto_alg): """Return encryption algorithm scapy name. :param crypto_alg: Encryption algorithm. :type crypto_alg: CryptoAlg :returns: Algorithm scapy name. :rtype: str """ return crypto_alg.scapy_name @staticmethod def integ_alg_sha_256_128(): """Return integrity algorithm SHA-256-128. :returns: IntegAlg enum SHA_256_128 object. :rtype: IntegAlg """ return IntegAlg.SHA_256_128 @staticmethod def integ_alg_sha_512_256(): """Return integrity algorithm SHA-512-256. :returns: IntegAlg enum SHA_512_256 object. :rtype: IntegAlg """ return IntegAlg.SHA_512_256 @staticmethod def get_integ_alg_key_len(integ_alg): """Return integrity algorithm key length. None argument is accepted, returning zero. :param integ_alg: Integrity algorithm. :type integ_alg: Optional[IntegAlg] :returns: Key length. :rtype: int """ return 0 if integ_alg is None else integ_alg.key_len @staticmethod def get_integ_alg_scapy_name(integ_alg): """Return integrity algorithm scapy name. :param integ_alg: Integrity algorithm. :type integ_alg: IntegAlg :returns: Algorithm scapy name. :rtype: str """ return integ_alg.scapy_name @staticmethod def ipsec_proto_esp(): """Return IPSec protocol ESP. :returns: IPsecProto enum ESP object. :rtype: IPsecProto """ return int(IPsecProto.IPSEC_API_PROTO_ESP) @staticmethod def ipsec_proto_ah(): """Return IPSec protocol AH. :returns: IPsecProto enum AH object. :rtype: IPsecProto """ return int(IPsecProto.IPSEC_API_PROTO_AH) @staticmethod def vpp_ipsec_select_backend(node, protocol, index=1): """Select IPsec backend. :param node: VPP node to select IPsec backend on. :param protocol: IPsec protocol. :param index: Backend index. :type node: dict :type protocol: IPsecProto :type index: int :raises RuntimeError: If failed to select IPsec backend or if no API reply received. """ cmd = "ipsec_select_backend" err_msg = f"Failed to select IPsec backend on host {node['host']}" args = dict(protocol=protocol, index=index) with PapiSocketExecutor(node) as papi_exec: papi_exec.add(cmd, **args).get_reply(err_msg) @staticmethod def vpp_ipsec_set_async_mode(node, async_enable=1): """Set IPsec async mode on|off. Unconditionally, attempt to switch crypto dispatch into polling mode. :param node: VPP node to set IPsec async mode. :param async_enable: Async mode on or off. :type node: dict :type async_enable: int :raises RuntimeError: If failed to set IPsec async mode or if no API reply received. """ with PapiSocketExecutor(node) as papi_exec: cmd = "ipsec_set_async_mode" err_msg = f"Failed to set IPsec async mode on host {node['host']}" args = dict(async_enable=async_enable) papi_exec.add(cmd, **args).get_reply(err_msg) cmd = "crypto_set_async_dispatch_v2" err_msg = "Failed to set dispatch mode." args = dict(mode=0, adaptive=False) try: papi_exec.add(cmd, **args).get_reply(err_msg) except (AttributeError, RuntimeError): # Expected when VPP build does not have the _v2 yet # (after and before the first CRC check). # TODO: Fail here when testing of pre-23.10 builds is over. pass @staticmethod def vpp_ipsec_crypto_sw_scheduler_set_worker( node, workers, crypto_enable=False ): """Enable or disable crypto on specific vpp worker threads. :param node: VPP node to enable or disable crypto for worker threads. :param workers: List of VPP thread numbers. :param crypto_enable: Disable or enable crypto work. :type node: dict :type workers: Iterable[int] :type crypto_enable: bool :raises RuntimeError: If failed to enable or disable crypto for worker thread or if no API reply received. """ for worker in workers: cmd = "crypto_sw_scheduler_set_worker" err_msg = ( "Failed to disable/enable crypto for worker thread" f" on host {node['host']}" ) args = dict(worker_index=worker - 1, crypto_enable=crypto_enable) with PapiSocketExecutor(node) as papi_exec: papi_exec.add(cmd, **args).get_reply(err_msg) @staticmethod def vpp_ipsec_crypto_sw_scheduler_set_worker_on_all_duts( nodes, crypto_enable=False ): """Enable or disable crypto on specific vpp worker threads. :param node: VPP node to enable or disable crypto for worker threads. :param crypto_enable: Disable or enable crypto work. :type node: dict :type crypto_enable: bool :raises RuntimeError: If failed to enable or disable crypto for worker thread or if no API reply received. """ for node_name, node in nodes.items(): if node["type"] == NodeType.DUT: thread_data = VPPUtil.vpp_show_threads(node) worker_cnt = len(thread_data) - 1 if not worker_cnt: return worker_ids = list() workers = BuiltIn().get_variable_value( f"${{{node_name}_cpu_dp}}" ) for item in thread_data: if str(item.cpu_id) in workers.split(","): worker_ids.append(item.id) IPsecUtil.vpp_ipsec_crypto_sw_scheduler_set_worker( node, workers=worker_ids, crypto_enable=crypto_enable ) @staticmethod def vpp_ipsec_add_sad_entry( node, sad_id, spi, crypto_alg, crypto_key, integ_alg=None, integ_key="", tunnel_src=None, tunnel_dst=None, ): """Create Security Association Database entry on the VPP node. :param node: VPP node to add SAD entry on. :param sad_id: SAD entry ID. :param spi: Security Parameter Index of this SAD entry. :param crypto_alg: The encryption algorithm name. :param crypto_key: The encryption key string. :param integ_alg: The integrity algorithm name. :param integ_key: The integrity key string. :param tunnel_src: Tunnel header source IPv4 or IPv6 address. If not specified ESP transport mode is used. :param tunnel_dst: Tunnel header destination IPv4 or IPv6 address. If not specified ESP transport mode is used. :type node: dict :type sad_id: int :type spi: int :type crypto_alg: CryptoAlg :type crypto_key: str :type integ_alg: Optional[IntegAlg] :type integ_key: str :type tunnel_src: str :type tunnel_dst: str """ if isinstance(crypto_key, str): crypto_key = crypto_key.encode(encoding="utf-8") if isinstance(integ_key, str): integ_key = integ_key.encode(encoding="utf-8") ckey = dict(length=len(crypto_key), data=crypto_key) ikey = dict(length=len(integ_key), data=integ_key if integ_key else 0) flags = int(IPsecSadFlags.IPSEC_API_SAD_FLAG_NONE) if tunnel_src and tunnel_dst: flags = flags | int(IPsecSadFlags.IPSEC_API_SAD_FLAG_IS_TUNNEL) src_addr = ip_address(tunnel_src) dst_addr = ip_address(tunnel_dst) if src_addr.version == 6: flags = flags | int( IPsecSadFlags.IPSEC_API_SAD_FLAG_IS_TUNNEL_V6 ) else: src_addr = "" dst_addr = "" cmd = "ipsec_sad_entry_add_v2" err_msg = ( "Failed to add Security Association Database entry" f" on host {node['host']}" ) sad_entry = dict( sad_id=int(sad_id), spi=int(spi), crypto_algorithm=crypto_alg.alg_int_repr, crypto_key=ckey, integrity_algorithm=integ_alg.alg_int_repr if integ_alg else 0, integrity_key=ikey, flags=flags, tunnel=dict( src=str(src_addr), dst=str(dst_addr), table_id=0, encap_decap_flags=int( TunnelEncpaDecapFlags.TUNNEL_API_ENCAP_DECAP_FLAG_NONE ), dscp=int(IpDscp.IP_API_DSCP_CS0), ), protocol=int(IPsecProto.IPSEC_API_PROTO_ESP), udp_src_port=IPSEC_UDP_PORT_DEFAULT, udp_dst_port=IPSEC_UDP_PORT_DEFAULT, anti_replay_window_size=IPSEC_REPLAY_WINDOW_DEFAULT, ) args = dict(entry=sad_entry) with PapiSocketExecutor(node) as papi_exec: papi_exec.add(cmd, **args).get_reply(err_msg) @staticmethod def vpp_ipsec_add_sad_entries( node, n_entries, sad_id, spi, crypto_alg, crypto_key, integ_alg=None, integ_key="", tunnel_src=None, tunnel_dst=None, tunnel_addr_incr=True, ): """Create multiple Security Association Database entries on VPP node. :param node: VPP node to add SAD entry on. :param n_entries: Number of SAD entries to be created. :param sad_id: First SAD entry ID. All subsequent SAD entries will have id incremented by 1. :param spi: Security Parameter Index of first SAD entry. All subsequent SAD entries will have spi incremented by 1. :param crypto_alg: The encryption algorithm name. :param crypto_key: The encryption key string. :param integ_alg: The integrity algorithm name. :param integ_key: The integrity key string. :param tunnel_src: Tunnel header source IPv4 or IPv6 address. If not specified ESP transport mode is used. :param tunnel_dst: Tunnel header destination IPv4 or IPv6 address. If not specified ESP transport mode is used. :param tunnel_addr_incr: Enable or disable tunnel IP address incremental step. :type node: dict :type n_entries: int :type sad_id: int :type spi: int :type crypto_alg: CryptoAlg :type crypto_key: str :type integ_alg: Optional[IntegAlg] :type integ_key: str :type tunnel_src: str :type tunnel_dst: str :type tunnel_addr_incr: bool """ if isinstance(crypto_key, str): crypto_key = crypto_key.encode(encoding="utf-8") if isinstance(integ_key, str): integ_key = integ_key.encode(encoding="utf-8") if tunnel_src and tunnel_dst: src_addr = ip_address(tunnel_src) dst_addr = ip_address(tunnel_dst) else: src_addr = "" dst_addr = "" if tunnel_addr_incr: addr_incr = ( 1 << (128 - 96) if src_addr.version == 6 else 1 << (32 - 24) ) else: addr_incr = 0 ckey = dict(length=len(crypto_key), data=crypto_key) ikey = dict(length=len(integ_key), data=integ_key if integ_key else 0) flags = int(IPsecSadFlags.IPSEC_API_SAD_FLAG_NONE) if tunnel_src and tunnel_dst: flags = flags | int(IPsecSadFlags.IPSEC_API_SAD_FLAG_IS_TUNNEL) if src_addr.version == 6: flags = flags | int( IPsecSadFlags.IPSEC_API_SAD_FLAG_IS_TUNNEL_V6 ) cmd = "ipsec_sad_entry_add_v2" err_msg = ( "Failed to add Security Association Database entry" f" on host {node['host']}" ) sad_entry = dict( sad_id=int(sad_id), spi=int(spi), crypto_algorithm=crypto_alg.alg_int_repr, crypto_key=ckey, integrity_algorithm=integ_alg.alg_int_repr if integ_alg else 0, integrity_key=ikey, flags=flags, tunnel=dict( src=str(src_addr), dst=str(dst_addr), table_id=0, encap_decap_flags=int( TunnelEncpaDecapFlags.TUNNEL_API_ENCAP_DECAP_FLAG_NONE ), dscp=int(IpDscp.IP_API_DSCP_CS0), ), protocol=int(IPsecProto.IPSEC_API_PROTO_ESP), udp_src_port=IPSEC_UDP_PORT_DEFAULT, udp_dst_port=IPSEC_UDP_PORT_DEFAULT, anti_replay_window_size=IPSEC_REPLAY_WINDOW_DEFAULT, ) args = dict(entry=sad_entry) with PapiSocketExecutor(node, is_async=True) as papi_exec: for i in range(n_entries): args["entry"]["sad_id"] = int(sad_id) + i args["entry"]["spi"] = int(spi) + i args["entry"]["tunnel"]["src"] = ( str(src_addr + i * addr_incr) if tunnel_src and tunnel_dst else src_addr ) args["entry"]["tunnel"]["dst"] = ( str(dst_addr + i * addr_incr) if tunnel_src and tunnel_dst else dst_addr ) history = bool(not 1 < i < n_entries - 2) papi_exec.add(cmd, history=history, **args) papi_exec.get_replies(err_msg) @staticmethod def vpp_ipsec_set_ip_route( node, n_tunnels, tunnel_src, traffic_addr, tunnel_dst, interface, raddr_range, dst_mac=None, ): """Set IP address and route on interface. :param node: VPP node to add config on. :param n_tunnels: Number of tunnels to create. :param tunnel_src: Tunnel header source IPv4 or IPv6 address. :param traffic_addr: Traffic destination IP address to route. :param tunnel_dst: Tunnel header destination IPv4 or IPv6 address. :param interface: Interface key on node 1. :param raddr_range: Mask specifying range of Policy selector Remote IP addresses. Valid values are from 1 to 32 in case of IPv4 and to 128 in case of IPv6. :param dst_mac: The MAC address of destination tunnels. :type node: dict :type n_tunnels: int :type tunnel_src: str :type traffic_addr: str :type tunnel_dst: str :type interface: str :type raddr_range: int :type dst_mac: str """ tunnel_src = ip_address(tunnel_src) tunnel_dst = ip_address(tunnel_dst) traffic_addr = ip_address(traffic_addr) tunnel_dst_prefix = 128 if tunnel_dst.version == 6 else 32 addr_incr = ( 1 << (128 - raddr_range) if tunnel_src.version == 6 else 1 << (32 - raddr_range) ) cmd1 = "sw_interface_add_del_address" args1 = dict( sw_if_index=InterfaceUtil.get_interface_index(node, interface), is_add=True, del_all=False, prefix=None, ) cmd2 = "ip_route_add_del" args2 = dict(is_add=1, is_multipath=0, route=None) cmd3 = "ip_neighbor_add_del" args3 = dict( is_add=True, neighbor=dict( sw_if_index=Topology.get_interface_sw_index(node, interface), flags=0, mac_address=str(dst_mac), ip_address=None, ), ) err_msg = ( "Failed to configure IP addresses, IP routes and" f" IP neighbor on interface {interface} on host {node['host']}" if dst_mac else "Failed to configure IP addresses and IP routes" f" on interface {interface} on host {node['host']}" ) with PapiSocketExecutor(node, is_async=True) as papi_exec: for i in range(n_tunnels): tunnel_dst_addr = tunnel_dst + i * addr_incr args1["prefix"] = IPUtil.create_prefix_object( tunnel_src + i * addr_incr, raddr_range ) args2["route"] = IPUtil.compose_vpp_route_structure( node, traffic_addr + i, prefix_len=tunnel_dst_prefix, interface=interface, gateway=tunnel_dst_addr, ) history = bool(not 1 < i < n_tunnels - 2) papi_exec.add(cmd1, history=history, **args1) papi_exec.add(cmd2, history=history, **args2) args2["route"] = IPUtil.compose_vpp_route_structure( node, tunnel_dst_addr, prefix_len=tunnel_dst_prefix, interface=interface, gateway=tunnel_dst_addr, ) papi_exec.add(cmd2, history=history, **args2) if dst_mac: args3["neighbor"]["ip_address"] = ip_address( tunnel_dst_addr ) papi_exec.add(cmd3, history=history, **args3) papi_exec.get_replies(err_msg) @staticmethod def vpp_ipsec_add_spd(node, spd_id): """Create Security Policy Database on the VPP node. :param node: VPP node to add SPD on. :param spd_id: SPD ID. :type node: dict :type spd_id: int """ cmd = "ipsec_spd_add_del" err_msg = ( f"Failed to add Security Policy Database on host {node['host']}" ) args = dict(is_add=True, spd_id=int(spd_id)) with PapiSocketExecutor(node) as papi_exec: papi_exec.add(cmd, **args).get_reply(err_msg) @staticmethod def vpp_ipsec_spd_add_if(node, spd_id, interface): """Add interface to the Security Policy Database. :param node: VPP node. :param spd_id: SPD ID to add interface on. :param interface: Interface name or sw_if_index. :type node: dict :type spd_id: int :type interface: str or int """ cmd = "ipsec_interface_add_del_spd" err_msg = ( f"Failed to add interface {interface} to Security Policy" f" Database {spd_id} on host {node['host']}" ) args = dict( is_add=True, sw_if_index=InterfaceUtil.get_interface_index(node, interface), spd_id=int(spd_id), ) with PapiSocketExecutor(node) as papi_exec: papi_exec.add(cmd, **args).get_reply(err_msg) @staticmethod def vpp_ipsec_create_spds_match_nth_entry( node, dir1_interface, dir2_interface, entry_amount, local_addr_range, remote_addr_range, action=PolicyAction.BYPASS, inbound=False, bidirectional=True, ): """Create one matching SPD entry for inbound or outbound traffic on a DUT for each traffic direction and also create entry_amount - 1 non-matching SPD entries. Create a Security Policy Database on each outbound interface where these entries will be configured. The matching SPD entry will have the lowest priority, input action and will be configured to match the IP flow. The non-matching entries will be the same, except with higher priority and non-matching IP flows. Action Protect is currently not supported. :param node: VPP node to configured the SPDs and their entries. :param dir1_interface: The interface in direction 1 where the entries will be checked. :param dir2_interface: The interface in direction 2 where the entries will be checked. :param entry_amount: The number of SPD entries to configure. If entry_amount == 1, no non-matching entries will be configured. :param local_addr_range: Matching local address range in direction 1 in format IP/prefix or IP/mask. If no mask is provided, it's considered to be /32. :param remote_addr_range: Matching remote address range in direction 1 in format IP/prefix or IP/mask. If no mask is provided, it's considered to be /32. :param action: Policy action. :param inbound: If True policy is for inbound traffic, otherwise outbound. :param bidirectional: When True, will create SPDs in both directions of traffic. When False, only in one direction. :type node: dict :type dir1_interface: Union[string, int] :type dir2_interface: Union[string, int] :type entry_amount: int :type local_addr_range: Union[string, ipaddress.IPv4Address, ipaddress.IPv6Address] :type remote_addr_range: Union[string, ipaddress.IPv4Address, ipaddress.IPv6Address] :type action: IPsecUtil.PolicyAction :type inbound: bool :type bidirectional: bool :raises NotImplementedError: When the action is PolicyAction.PROTECT. """ if action == PolicyAction.PROTECT: raise NotImplementedError("Policy action PROTECT is not supported.") spd_id_dir1 = 1 spd_id_dir2 = 2 matching_priority = 1 IPsecUtil.vpp_ipsec_add_spd(node, spd_id_dir1) IPsecUtil.vpp_ipsec_spd_add_if(node, spd_id_dir1, dir1_interface) # matching entry direction 1 IPsecUtil.vpp_ipsec_add_spd_entry( node, spd_id_dir1, matching_priority, action, inbound=inbound, laddr_range=local_addr_range, raddr_range=remote_addr_range, ) if bidirectional: IPsecUtil.vpp_ipsec_add_spd(node, spd_id_dir2) IPsecUtil.vpp_ipsec_spd_add_if(node, spd_id_dir2, dir2_interface) # matching entry direction 2, the address ranges are switched IPsecUtil.vpp_ipsec_add_spd_entry( node, spd_id_dir2, matching_priority, action, inbound=inbound, laddr_range=remote_addr_range, raddr_range=local_addr_range, ) # non-matching entries no_match_entry_amount = entry_amount - 1 if no_match_entry_amount > 0: # create a NetworkIncrement representation of the network, # then skip the matching network no_match_local_addr_range = NetworkIncrement( ip_network(local_addr_range) ) next(no_match_local_addr_range) no_match_remote_addr_range = NetworkIncrement( ip_network(remote_addr_range) ) next(no_match_remote_addr_range) # non-matching entries direction 1 IPsecUtil.vpp_ipsec_add_spd_entries( node, no_match_entry_amount, spd_id_dir1, ObjIncrement(matching_priority + 1, 1), action, inbound=inbound, laddr_range=no_match_local_addr_range, raddr_range=no_match_remote_addr_range, ) if bidirectional: # reset the networks so that we're using a unified config # the address ranges are switched no_match_remote_addr_range = NetworkIncrement( ip_network(local_addr_range) ) next(no_match_remote_addr_range) no_match_local_addr_range = NetworkIncrement( ip_network(remote_addr_range) ) next(no_match_local_addr_range) # non-matching entries direction 2 IPsecUtil.vpp_ipsec_add_spd_entries( node, no_match_entry_amount, spd_id_dir2, ObjIncrement(matching_priority + 1, 1), action, inbound=inbound, laddr_range=no_match_local_addr_range, raddr_range=no_match_remote_addr_range, ) IPsecUtil.vpp_ipsec_show_all(node) @staticmethod def _vpp_ipsec_add_spd_entry_internal( executor, spd_id, priority, action, inbound=True, sa_id=None, proto=None, laddr_range=None, raddr_range=None, lport_range=None, rport_range=None, is_ipv6=False, ): """Prepare to create Security Policy Database entry on the VPP node. This just adds one more command to the executor. The call site shall get replies once all entries are added, to get speed benefit from async PAPI. :param executor: Open PAPI executor (async handling) to add commands to. :param spd_id: SPD ID to add entry on. :param priority: SPD entry priority, higher number = higher priority. :param action: Policy action. :param inbound: If True policy is for inbound traffic, otherwise outbound. :param sa_id: SAD entry ID for action PolicyAction.PROTECT. :param proto: Policy selector next layer protocol number. :param laddr_range: Policy selector local IPv4 or IPv6 address range in format IP/prefix or IP/mask. If no mask is provided, it's considered to be /32. :param raddr_range: Policy selector remote IPv4 or IPv6 address range in format IP/prefix or IP/mask. If no mask is provided, it's considered to be /32. :param lport_range: Policy selector local TCP/UDP port range in format -. :param rport_range: Policy selector remote TCP/UDP port range in format -. :param is_ipv6: True in case of IPv6 policy when IPv6 address range is not defined so it will default to address ::/0, otherwise False. :type executor: PapiSocketExecutor :type spd_id: int :type priority: int :type action: IPsecUtil.PolicyAction :type inbound: bool :type sa_id: int :type proto: int :type laddr_range: string :type raddr_range: string :type lport_range: string :type rport_range: string :type is_ipv6: bool """ if laddr_range is None: laddr_range = "::/0" if is_ipv6 else "0.0.0.0/0" if raddr_range is None: raddr_range = "::/0" if is_ipv6 else "0.0.0.0/0" local_net = ip_network(laddr_range, strict=False) remote_net = ip_network(raddr_range, strict=False) cmd = "ipsec_spd_entry_add_del_v2" spd_entry = dict( spd_id=int(spd_id), priority=int(priority), is_outbound=not inbound, sa_id=int(sa_id) if sa_id else 0, policy=int(action), protocol=255 if proto is None else int(proto), remote_address_start=IPAddress.create_ip_address_object( remote_net.network_address ), remote_address_stop=IPAddress.create_ip_address_object( remote_net.broadcast_address ), local_address_start=IPAddress.create_ip_address_object( local_net.network_address ), local_address_stop=IPAddress.create_ip_address_object( local_net.broadcast_address ), remote_port_start=( int(rport_range.split("-")[0]) if rport_range else 0 ), remote_port_stop=( int(rport_range.split("-")[1]) if rport_range else 65535 ), local_port_start=( int(lport_range.split("-")[0]) if lport_range else 0 ), local_port_stop=( int(lport_range.split("-")[1]) if rport_range else 65535 ), ) args = dict(is_add=True, entry=spd_entry) executor.add(cmd, **args) @staticmethod def vpp_ipsec_add_spd_entry( node, spd_id, priority, action, inbound=True, sa_id=None, proto=None, laddr_range=None, raddr_range=None, lport_range=None, rport_range=None, is_ipv6=False, ): """Create Security Policy Database entry on the VPP node. :param node: VPP node to add SPD entry on. :param spd_id: SPD ID to add entry on. :param priority: SPD entry priority, higher number = higher priority. :param action: Policy action. :param inbound: If True policy is for inbound traffic, otherwise outbound. :param sa_id: SAD entry ID for action PolicyAction.PROTECT. :param proto: Policy selector next layer protocol number. :param laddr_range: Policy selector local IPv4 or IPv6 address range in format IP/prefix or IP/mask. If no mask is provided, it's considered to be /32. :param raddr_range: Policy selector remote IPv4 or IPv6 address range in format IP/prefix or IP/mask. If no mask is provided, it's considered to be /32. :param lport_range: Policy selector local TCP/UDP port range in format -. :param rport_range: Policy selector remote TCP/UDP port range in format -. :param is_ipv6: True in case of IPv6 policy when IPv6 address range is not defined so it will default to address ::/0, otherwise False. :type node: dict :type spd_id: int :type priority: int :type action: IPsecUtil.PolicyAction :type inbound: bool :type sa_id: int :type proto: int :type laddr_range: string :type raddr_range: string :type lport_range: string :type rport_range: string :type is_ipv6: bool """ err_msg = ( "Failed to add entry to Security Policy Database" f" {spd_id} on host {node['host']}" ) with PapiSocketExecutor(node, is_async=True) as papi_exec: IPsecUtil._vpp_ipsec_add_spd_entry_internal( papi_exec, spd_id, priority, action, inbound, sa_id, proto, laddr_range, raddr_range, lport_range, rport_range, is_ipv6, ) papi_exec.get_replies(err_msg) @staticmethod def vpp_ipsec_add_spd_entries( node, n_entries, spd_id, priority, action, inbound, sa_id=None, proto=None, laddr_range=None, raddr_range=None, lport_range=None, rport_range=None, is_ipv6=False, ): """Create multiple Security Policy Database entries on the VPP node. :param node: VPP node to add SPD entries on. :param n_entries: Number of SPD entries to be added. :param spd_id: SPD ID to add entries on. :param priority: SPD entries priority, higher number = higher priority. :param action: Policy action. :param inbound: If True policy is for inbound traffic, otherwise outbound. :param sa_id: SAD entry ID for action PolicyAction.PROTECT. :param proto: Policy selector next layer protocol number. :param laddr_range: Policy selector local IPv4 or IPv6 address range in format IP/prefix or IP/mask. If no mask is provided, it's considered to be /32. :param raddr_range: Policy selector remote IPv4 or IPv6 address range in format IP/prefix or IP/mask. If no mask is provided, it's considered to be /32. :param lport_range: Policy selector local TCP/UDP port range in format -. :param rport_range: Policy selector remote TCP/UDP port range in format -. :param is_ipv6: True in case of IPv6 policy when IPv6 address range is not defined so it will default to address ::/0, otherwise False. :type node: dict :type n_entries: int :type spd_id: int :type priority: IPsecUtil.ObjIncrement :type action: IPsecUtil.PolicyAction :type inbound: bool :type sa_id: IPsecUtil.ObjIncrement :type proto: int :type laddr_range: IPsecUtil.NetworkIncrement :type raddr_range: IPsecUtil.NetworkIncrement :type lport_range: string :type rport_range: string :type is_ipv6: bool """ if laddr_range is None: laddr_range = "::/0" if is_ipv6 else "0.0.0.0/0" laddr_range = NetworkIncrement(ip_network(laddr_range), 0) if raddr_range is None: raddr_range = "::/0" if is_ipv6 else "0.0.0.0/0" raddr_range = NetworkIncrement(ip_network(raddr_range), 0) err_msg = ( "Failed to add entry to Security Policy Database" f" {spd_id} on host {node['host']}" ) with PapiSocketExecutor(node, is_async=True) as papi_exec: for _ in range(n_entries): IPsecUtil._vpp_ipsec_add_spd_entry_internal( papi_exec, spd_id, next(priority), action, inbound, next(sa_id) if sa_id is not None else sa_id, proto, next(laddr_range), next(raddr_range), lport_range, rport_range, is_ipv6, ) papi_exec.get_replies(err_msg) @staticmethod def _ipsec_create_loopback_dut1_papi(nodes, tun_ips, if1_key, if2_key): """Create loopback interface and set IP address on VPP node 1 interface using PAPI. :param nodes: VPP nodes to create tunnel interfaces. :param tun_ips: Dictionary with VPP node 1 ipsec tunnel interface IPv4/IPv6 address (ip1) and VPP node 2 ipsec tunnel interface IPv4/IPv6 address (ip2). :param if1_key: VPP node 1 interface key from topology file. :param if2_key: VPP node 2 / TG node (in case of 2-node topology) interface key from topology file. :type nodes: dict :type tun_ips: dict :type if1_key: str :type if2_key: str """ with PapiSocketExecutor(nodes["DUT1"]) as papi_exec: # Create loopback interface on DUT1, set it to up state cmd = "create_loopback_instance" args = dict( mac_address=0, is_specified=False, user_instance=0, ) err_msg = ( "Failed to create loopback interface" f" on host {nodes['DUT1']['host']}" ) papi_exec.add(cmd, **args) loop_sw_if_idx = papi_exec.get_sw_if_index(err_msg) cmd = "sw_interface_set_flags" args = dict( sw_if_index=loop_sw_if_idx, flags=InterfaceStatusFlags.IF_STATUS_API_FLAG_ADMIN_UP.value, ) err_msg = ( "Failed to set loopback interface state up" f" on host {nodes['DUT1']['host']}" ) papi_exec.add(cmd, **args).get_reply(err_msg) # Set IP address on VPP node 1 interface cmd = "sw_interface_add_del_address" args = dict( sw_if_index=InterfaceUtil.get_interface_index( nodes["DUT1"], if1_key ), is_add=True, del_all=False, prefix=IPUtil.create_prefix_object( tun_ips["ip2"] - 1, 96 if tun_ips["ip2"].version == 6 else 24, ), ) err_msg = ( f"Failed to set IP address on interface {if1_key}" f" on host {nodes['DUT1']['host']}" ) papi_exec.add(cmd, **args).get_reply(err_msg) cmd2 = "ip_neighbor_add_del" args2 = dict( is_add=1, neighbor=dict( sw_if_index=Topology.get_interface_sw_index( nodes["DUT1"], if1_key ), flags=1, mac_address=str( Topology.get_interface_mac(nodes["DUT2"], if2_key) if "DUT2" in nodes.keys() else Topology.get_interface_mac(nodes["TG"], if2_key) ), ip_address=tun_ips["ip2"].compressed, ), ) err_msg = f"Failed to add IP neighbor on interface {if1_key}" papi_exec.add(cmd2, **args2).get_reply(err_msg) return loop_sw_if_idx @staticmethod def _ipsec_create_tunnel_interfaces_dut1_papi( nodes, tun_ips, if1_key, if2_key, n_tunnels, crypto_alg, integ_alg, raddr_ip2, addr_incr, spi_d, existing_tunnels=0, ): """Create multiple IPsec tunnel interfaces on DUT1 node using PAPI. Generate random keys and return them (so DUT2 or TG can decrypt). :param nodes: VPP nodes to create tunnel interfaces. :param tun_ips: Dictionary with VPP node 1 ipsec tunnel interface IPv4/IPv6 address (ip1) and VPP node 2 ipsec tunnel interface IPv4/IPv6 address (ip2). :param if1_key: VPP node 1 interface key from topology file. :param if2_key: VPP node 2 / TG node (in case of 2-node topology) interface key from topology file. :param n_tunnels: Number of tunnel interfaces to be there at the end. :param crypto_alg: The encryption algorithm name. :param integ_alg: The integrity algorithm name. :param raddr_ip2: Policy selector remote IPv4/IPv6 start address for the first tunnel in direction node2->node1. :param spi_d: Dictionary with SPIs for VPP node 1 and VPP node 2. :param addr_incr: IP / IPv6 address incremental step. :param existing_tunnels: Number of tunnel interfaces before creation. Useful mainly for reconf tests. Default 0. :type nodes: dict :type tun_ips: dict :type if1_key: str :type if2_key: str :type n_tunnels: int :type crypto_alg: CryptoAlg :type integ_alg: Optional[IntegAlg] :type raddr_ip2: IPv4Address or IPv6Address :type addr_incr: int :type spi_d: dict :type existing_tunnels: int :returns: Generated ckeys and ikeys. :rtype: List[bytes], List[bytes] """ if not existing_tunnels: loop_sw_if_idx = IPsecUtil._ipsec_create_loopback_dut1_papi( nodes, tun_ips, if1_key, if2_key ) else: loop_sw_if_idx = InterfaceUtil.vpp_get_interface_sw_index( nodes["DUT1"], "loop0" ) with PapiSocketExecutor(nodes["DUT1"], is_async=True) as papi_exec: # Configure IP addresses on loop0 interface cmd = "sw_interface_add_del_address" args = dict( sw_if_index=loop_sw_if_idx, is_add=True, del_all=False, prefix=None, ) for i in range(existing_tunnels, n_tunnels): args["prefix"] = IPUtil.create_prefix_object( tun_ips["ip1"] + i * addr_incr, 128 if tun_ips["ip1"].version == 6 else 32, ) papi_exec.add( cmd, history=bool(not 1 < i < n_tunnels - 2), **args ) # Configure IPIP tunnel interfaces cmd = "ipip_add_tunnel" ipip_tunnel = dict( instance=Constants.BITWISE_NON_ZERO, src=None, dst=None, table_id=0, flags=int( TunnelEncpaDecapFlags.TUNNEL_API_ENCAP_DECAP_FLAG_NONE ), mode=int(TunnelMode.TUNNEL_API_MODE_P2P), dscp=int(IpDscp.IP_API_DSCP_CS0), ) args = dict(tunnel=ipip_tunnel) ipip_tunnels = [None] * existing_tunnels for i in range(existing_tunnels, n_tunnels): ipip_tunnel["src"] = IPAddress.create_ip_address_object( tun_ips["ip1"] + i * addr_incr ) ipip_tunnel["dst"] = IPAddress.create_ip_address_object( tun_ips["ip2"] ) papi_exec.add( cmd, history=bool(not 1 < i < n_tunnels - 2), **args ) err_msg = ( "Failed to add IPIP tunnel interfaces on host" f" {nodes['DUT1']['host']}" ) ipip_tunnels.extend( [ reply["sw_if_index"] for reply in papi_exec.get_replies(err_msg) if "sw_if_index" in reply ] ) # Configure IPSec SAD entries ckeys = [bytes()] * existing_tunnels ikeys = [bytes()] * existing_tunnels cmd = "ipsec_sad_entry_add_v2" c_key = dict(length=0, data=None) i_key = dict(length=0, data=None) common_flags = IPsecSadFlags.IPSEC_API_SAD_FLAG_NONE sad_entry = dict( sad_id=None, spi=None, protocol=int(IPsecProto.IPSEC_API_PROTO_ESP), crypto_algorithm=crypto_alg.alg_int_repr, crypto_key=c_key, integrity_algorithm=integ_alg.alg_int_repr if integ_alg else 0, integrity_key=i_key, flags=common_flags, tunnel=dict( src=0, dst=0, table_id=0, encap_decap_flags=int( TunnelEncpaDecapFlags.TUNNEL_API_ENCAP_DECAP_FLAG_NONE ), dscp=int(IpDscp.IP_API_DSCP_CS0), ), salt=0, udp_src_port=IPSEC_UDP_PORT_DEFAULT, udp_dst_port=IPSEC_UDP_PORT_DEFAULT, anti_replay_window_size=IPSEC_REPLAY_WINDOW_DEFAULT, ) args = dict(entry=sad_entry) for i in range(existing_tunnels, n_tunnels): ckeys.append( gen_key(IPsecUtil.get_crypto_alg_key_len(crypto_alg)) ) ikeys.append( gen_key(IPsecUtil.get_integ_alg_key_len(integ_alg)) ) # SAD entry for outband / tx path sad_entry["sad_id"] = i sad_entry["spi"] = spi_d["spi_1"] + i sad_entry["crypto_key"]["length"] = len(ckeys[i]) sad_entry["crypto_key"]["data"] = ckeys[i] if integ_alg: sad_entry["integrity_key"]["length"] = len(ikeys[i]) sad_entry["integrity_key"]["data"] = ikeys[i] papi_exec.add( cmd, history=bool(not 1 < i < n_tunnels - 2), **args ) sad_entry["flags"] |= IPsecSadFlags.IPSEC_API_SAD_FLAG_IS_INBOUND for i in range(existing_tunnels, n_tunnels): # SAD entry for inband / rx path sad_entry["sad_id"] = 100000 + i sad_entry["spi"] = spi_d["spi_2"] + i sad_entry["crypto_key"]["length"] = len(ckeys[i]) sad_entry["crypto_key"]["data"] = ckeys[i] if integ_alg: sad_entry["integrity_key"]["length"] = len(ikeys[i]) sad_entry["integrity_key"]["data"] = ikeys[i] papi_exec.add( cmd, history=bool(not 1 < i < n_tunnels - 2), **args ) err_msg = ( "Failed to add IPsec SAD entries on host" f" {nodes['DUT1']['host']}" ) papi_exec.get_replies(err_msg) # Add protection for tunnels with IPSEC cmd = "ipsec_tunnel_protect_update" n_hop = dict( address=0, via_label=MPLS_LABEL_INVALID, obj_id=Constants.BITWISE_NON_ZERO, ) ipsec_tunnel_protect = dict( sw_if_index=None, nh=n_hop, sa_out=None, n_sa_in=1, sa_in=None ) args = dict(tunnel=ipsec_tunnel_protect) for i in range(existing_tunnels, n_tunnels): args["tunnel"]["sw_if_index"] = ipip_tunnels[i] args["tunnel"]["sa_out"] = i args["tunnel"]["sa_in"] = [100000 + i] papi_exec.add( cmd, history=bool(not 1 < i < n_tunnels - 2), **args ) err_msg = ( "Failed to add protection for tunnels with IPSEC" f" on host {nodes['DUT1']['host']}" ) papi_exec.get_replies(err_msg) # Configure unnumbered interfaces cmd = "sw_interface_set_unnumbered" args = dict( is_add=True, sw_if_index=InterfaceUtil.get_interface_index( nodes["DUT1"], if1_key ), unnumbered_sw_if_index=0, ) for i in range(existing_tunnels, n_tunnels): args["unnumbered_sw_if_index"] = ipip_tunnels[i] papi_exec.add( cmd, history=bool(not 1 < i < n_tunnels - 2), **args ) # Set interfaces up cmd = "sw_interface_set_flags" args = dict( sw_if_index=0, flags=InterfaceStatusFlags.IF_STATUS_API_FLAG_ADMIN_UP.value, ) for i in range(existing_tunnels, n_tunnels): args["sw_if_index"] = ipip_tunnels[i] papi_exec.add( cmd, history=bool(not 1 < i < n_tunnels - 2), **args ) # Configure IP routes cmd = "ip_route_add_del" args = dict(is_add=1, is_multipath=0, route=None) for i in range(existing_tunnels, n_tunnels): args["route"] = IPUtil.compose_vpp_route_structure( nodes["DUT1"], (raddr_ip2 + i).compressed, prefix_len=128 if raddr_ip2.version == 6 else 32, interface=ipip_tunnels[i], ) papi_exec.add( cmd, history=bool(not 1 < i < n_tunnels - 2), **args ) err_msg = f"Failed to add IP routes on host {nodes['DUT1']['host']}" papi_exec.get_replies(err_msg) return ckeys, ikeys @staticmethod def _ipsec_create_tunnel_interfaces_dut2_papi( nodes, tun_ips, if2_key, n_tunnels, crypto_alg, ckeys, integ_alg, ikeys, raddr_ip1, addr_incr, spi_d, existing_tunnels=0, ): """Create multiple IPsec tunnel interfaces on DUT2 node using PAPI. This method accesses keys generated by DUT1 method and does not return anything. :param nodes: VPP nodes to create tunnel interfaces. :param tun_ips: Dictionary with VPP node 1 ipsec tunnel interface IPv4/IPv6 address (ip1) and VPP node 2 ipsec tunnel interface IPv4/IPv6 address (ip2). :param if2_key: VPP node 2 / TG node (in case of 2-node topology) interface key from topology file. :param n_tunnels: Number of tunnel interfaces to be there at the end. :param crypto_alg: The encryption algorithm name. :param ckeys: List of encryption keys. :param integ_alg: The integrity algorithm name. :param ikeys: List of integrity keys. :param spi_d: Dictionary with SPIs for VPP node 1 and VPP node 2. :param addr_incr: IP / IPv6 address incremental step. :param existing_tunnels: Number of tunnel interfaces before creation. Useful mainly for reconf tests. Default 0. :type nodes: dict :type tun_ips: dict :type if2_key: str :type n_tunnels: int :type crypto_alg: CryptoAlg :type ckeys: Sequence[bytes] :type integ_alg: Optional[IntegAlg] :type ikeys: Sequence[bytes] :type addr_incr: int :type spi_d: dict :type existing_tunnels: int """ with PapiSocketExecutor(nodes["DUT2"], is_async=True) as papi_exec: if not existing_tunnels: # Set IP address on VPP node 2 interface cmd = "sw_interface_add_del_address" args = dict( sw_if_index=InterfaceUtil.get_interface_index( nodes["DUT2"], if2_key ), is_add=True, del_all=False, prefix=IPUtil.create_prefix_object( tun_ips["ip2"], 96 if tun_ips["ip2"].version == 6 else 24, ), ) err_msg = ( f"Failed to set IP address on interface {if2_key}" f" on host {nodes['DUT2']['host']}" ) papi_exec.add(cmd, **args).get_replies(err_msg) # Configure IPIP tunnel interfaces cmd = "ipip_add_tunnel" ipip_tunnel = dict( instance=Constants.BITWISE_NON_ZERO, src=None, dst=None, table_id=0, flags=int( TunnelEncpaDecapFlags.TUNNEL_API_ENCAP_DECAP_FLAG_NONE ), mode=int(TunnelMode.TUNNEL_API_MODE_P2P), dscp=int(IpDscp.IP_API_DSCP_CS0), ) args = dict(tunnel=ipip_tunnel) ipip_tunnels = [None] * existing_tunnels for i in range(existing_tunnels, n_tunnels): ipip_tunnel["src"] = IPAddress.create_ip_address_object( tun_ips["ip2"] ) ipip_tunnel["dst"] = IPAddress.create_ip_address_object( tun_ips["ip1"] + i * addr_incr ) papi_exec.add( cmd, history=bool(not 1 < i < n_tunnels - 2), **args ) err_msg = ( "Failed to add IPIP tunnel interfaces on host" f" {nodes['DUT2']['host']}" ) ipip_tunnels.extend( [ reply["sw_if_index"] for reply in papi_exec.get_replies(err_msg) if "sw_if_index" in reply ] ) # Configure IPSec SAD entries cmd = "ipsec_sad_entry_add_v2" c_key = dict(length=0, data=None) i_key = dict(length=0, data=None) common_flags = IPsecSadFlags.IPSEC_API_SAD_FLAG_NONE sad_entry = dict( sad_id=None, spi=None, protocol=int(IPsecProto.IPSEC_API_PROTO_ESP), crypto_algorithm=crypto_alg.alg_int_repr, crypto_key=c_key, integrity_algorithm=integ_alg.alg_int_repr if integ_alg else 0, integrity_key=i_key, flags=common_flags, tunnel=dict( src=0, dst=0, table_id=0, encap_decap_flags=int( TunnelEncpaDecapFlags.TUNNEL_API_ENCAP_DECAP_FLAG_NONE ), dscp=int(IpDscp.IP_API_DSCP_CS0), ), salt=0, udp_src_port=IPSEC_UDP_PORT_DEFAULT, udp_dst_port=IPSEC_UDP_PORT_DEFAULT, anti_replay_window_size=IPSEC_REPLAY_WINDOW_DEFAULT, ) args = dict(entry=sad_entry) for i in range(existing_tunnels, n_tunnels): ckeys.append( gen_key(IPsecUtil.get_crypto_alg_key_len(crypto_alg)) ) ikeys.append( gen_key(IPsecUtil.get_integ_alg_key_len(integ_alg)) ) # SAD entry for outband / tx path sad_entry["sad_id"] = 100000 + i sad_entry["spi"] = spi_d["spi_2"] + i sad_entry["crypto_key"]["length"] = len(ckeys[i]) sad_entry["crypto_key"]["data"] = ckeys[i] if integ_alg: sad_entry["integrity_key"]["length"] = len(ikeys[i]) sad_entry["integrity_key"]["data"] = ikeys[i] papi_exec.add( cmd, history=bool(not 1 < i < n_tunnels - 2), **args ) sad_entry["flags"] |= IPsecSadFlags.IPSEC_API_SAD_FLAG_IS_INBOUND for i in range(existing_tunnels, n_tunnels): # SAD entry for inband / rx path sad_entry["sad_id"] = i sad_entry["spi"] = spi_d["spi_1"] + i sad_entry["crypto_key"]["length"] = len(ckeys[i]) sad_entry["crypto_key"]["data"] = ckeys[i] if integ_alg: sad_entry["integrity_key"]["length"] = len(ikeys[i]) sad_entry["integrity_key"]["data"] = ikeys[i] papi_exec.add( cmd, history=bool(not 1 < i < n_tunnels - 2), **args ) err_msg = ( f"Failed to add IPsec SAD entries on host" f" {nodes['DUT2']['host']}" ) papi_exec.get_replies(err_msg) # Add protection for tunnels with IPSEC cmd = "ipsec_tunnel_protect_update" n_hop = dict( address=0, via_label=MPLS_LABEL_INVALID, obj_id=Constants.BITWISE_NON_ZERO, ) ipsec_tunnel_protect = dict( sw_if_index=None, nh=n_hop, sa_out=None, n_sa_in=1, sa_in=None ) args = dict(tunnel=ipsec_tunnel_protect) for i in range(existing_tunnels, n_tunnels): args["tunnel"]["sw_if_index"] = ipip_tunnels[i] args["tunnel"]["sa_out"] = 100000 + i args["tunnel"]["sa_in"] = [i] papi_exec.add( cmd, history=bool(not 1 < i < n_tunnels - 2), **args ) err_msg = ( "Failed to add protection for tunnels with IPSEC" f" on host {nodes['DUT2']['host']}" ) papi_exec.get_replies(err_msg) if not existing_tunnels: # Configure IP route cmd = "ip_route_add_del" route = IPUtil.compose_vpp_route_structure( nodes["DUT2"], tun_ips["ip1"].compressed, prefix_len=32 if tun_ips["ip1"].version == 6 else 8, interface=if2_key, gateway=(tun_ips["ip2"] - 1).compressed, ) args = dict(is_add=1, is_multipath=0, route=route) papi_exec.add(cmd, **args) # Configure unnumbered interfaces cmd = "sw_interface_set_unnumbered" args = dict( is_add=True, sw_if_index=InterfaceUtil.get_interface_index( nodes["DUT2"], if2_key ), unnumbered_sw_if_index=0, ) for i in range(existing_tunnels, n_tunnels): args["unnumbered_sw_if_index"] = ipip_tunnels[i] papi_exec.add( cmd, history=bool(not 1 < i < n_tunnels - 2), **args ) # Set interfaces up cmd = "sw_interface_set_flags" args = dict( sw_if_index=0, flags=InterfaceStatusFlags.IF_STATUS_API_FLAG_ADMIN_UP.value, ) for i in range(existing_tunnels, n_tunnels): args["sw_if_index"] = ipip_tunnels[i] papi_exec.add( cmd, history=bool(not 1 < i < n_tunnels - 2), **args ) # Configure IP routes cmd = "ip_route_add_del" args = dict(is_add=1, is_multipath=0, route=None) for i in range(existing_tunnels, n_tunnels): args["route"] = IPUtil.compose_vpp_route_structure( nodes["DUT1"], (raddr_ip1 + i).compressed, prefix_len=128 if raddr_ip1.version == 6 else 32, interface=ipip_tunnels[i], ) papi_exec.add( cmd, history=bool(not 1 < i < n_tunnels - 2), **args ) err_msg = f"Failed to add IP routes on host {nodes['DUT2']['host']}" papi_exec.get_replies(err_msg) @staticmethod def vpp_ipsec_create_tunnel_interfaces( nodes, tun_if1_ip_addr, tun_if2_ip_addr, if1_key, if2_key, n_tunnels, crypto_alg, integ_alg, raddr_ip1, raddr_ip2, raddr_range, existing_tunnels=0, return_keys=False, ): """Create multiple IPsec tunnel interfaces between two VPP nodes. Some deployments (e.g. devicetest) need to know the generated keys. But other deployments (e.g. scale perf test) would get spammed if we returned keys every time. :param nodes: VPP nodes to create tunnel interfaces. :param tun_if1_ip_addr: VPP node 1 ipsec tunnel interface IPv4/IPv6 address. :param tun_if2_ip_addr: VPP node 2 ipsec tunnel interface IPv4/IPv6 address. :param if1_key: VPP node 1 interface key from topology file. :param if2_key: VPP node 2 / TG node (in case of 2-node topology) interface key from topology file. :param n_tunnels: Number of tunnel interfaces to be there at the end. :param crypto_alg: The encryption algorithm name. :param integ_alg: The integrity algorithm name. :param raddr_ip1: Policy selector remote IPv4/IPv6 start address for the first tunnel in direction node1->node2. :param raddr_ip2: Policy selector remote IPv4/IPv6 start address for the first tunnel in direction node2->node1. :param raddr_range: Mask specifying range of Policy selector Remote IPv4/IPv6 addresses. Valid values are from 1 to 32 in case of IPv4 and to 128 in case of IPv6. :param existing_tunnels: Number of tunnel interfaces before creation. Useful mainly for reconf tests. Default 0. :param return_keys: Whether generated keys should be returned. :type nodes: dict :type tun_if1_ip_addr: str :type tun_if2_ip_addr: str :type if1_key: str :type if2_key: str :type n_tunnels: int :type crypto_alg: CryptoAlg :type integ_alg: Optonal[IntegAlg] :type raddr_ip1: string :type raddr_ip2: string :type raddr_range: int :type existing_tunnels: int :type return_keys: bool :returns: Ckeys, ikeys, spi_1, spi_2. :rtype: Optional[List[bytes], List[bytes], int, int] """ n_tunnels = int(n_tunnels) existing_tunnels = int(existing_tunnels) spi_d = dict(spi_1=100000, spi_2=200000) tun_ips = dict( ip1=ip_address(tun_if1_ip_addr), ip2=ip_address(tun_if2_ip_addr) ) raddr_ip1 = ip_address(raddr_ip1) raddr_ip2 = ip_address(raddr_ip2) addr_incr = ( 1 << (128 - raddr_range) if tun_ips["ip1"].version == 6 else 1 << (32 - raddr_range) ) ckeys, ikeys = IPsecUtil._ipsec_create_tunnel_interfaces_dut1_papi( nodes, tun_ips, if1_key, if2_key, n_tunnels, crypto_alg, integ_alg, raddr_ip2, addr_incr, spi_d, existing_tunnels, ) if "DUT2" in nodes.keys(): IPsecUtil._ipsec_create_tunnel_interfaces_dut2_papi( nodes, tun_ips, if2_key, n_tunnels, crypto_alg, ckeys, integ_alg, ikeys, raddr_ip1, addr_incr, spi_d, existing_tunnels, ) if return_keys: return ckeys, ikeys, spi_d["spi_1"], spi_d["spi_2"] return None @staticmethod def _create_ipsec_script_files(dut, instances): """Create script files for configuring IPsec in containers :param dut: DUT node on which to create the script files :param instances: number of containers on DUT node :type dut: string :type instances: int """ scripts = [] for cnf in range(0, instances): script_filename = ( f"/tmp/ipsec_create_tunnel_cnf_{dut}_{cnf + 1}.config" ) scripts.append(open(script_filename, "w", encoding="utf-8")) return scripts @staticmethod def _close_and_copy_ipsec_script_files(dut, nodes, instances, scripts): """Close created scripts and copy them to containers :param dut: DUT node on which to create the script files :param nodes: VPP nodes :param instances: number of containers on DUT node :param scripts: dictionary holding the script files :type dut: string :type nodes: dict :type instances: int :type scripts: dict """ for cnf in range(0, instances): scripts[cnf].close() script_filename = ( f"/tmp/ipsec_create_tunnel_cnf_{dut}_{cnf + 1}.config" ) scp_node(nodes[dut], script_filename, script_filename) @staticmethod def vpp_ipsec_create_tunnel_interfaces_in_containers( nodes, if1_ip_addr, if2_ip_addr, n_tunnels, crypto_alg, integ_alg, raddr_ip1, raddr_ip2, raddr_range, n_instances, ): """Create multiple IPsec tunnel interfaces between two VPP nodes. :param nodes: VPP nodes to create tunnel interfaces. :param if1_ip_addr: VPP node 1 interface IP4 address. :param if2_ip_addr: VPP node 2 interface IP4 address. :param n_tunnels: Number of tunnell interfaces to create. :param crypto_alg: The encryption algorithm name. :param integ_alg: The integrity algorithm name. :param raddr_ip1: Policy selector remote IPv4 start address for the first tunnel in direction node1->node2. :param raddr_ip2: Policy selector remote IPv4 start address for the first tunnel in direction node2->node1. :param raddr_range: Mask specifying range of Policy selector Remote IPv4 addresses. Valid values are from 1 to 32. :param n_instances: Number of containers. :type nodes: dict :type if1_ip_addr: str :type if2_ip_addr: str :type n_tunnels: int :type crypto_alg: CryptoAlg :type integ_alg: Optional[IntegAlg] :type raddr_ip1: string :type raddr_ip2: string :type raddr_range: int :type n_instances: int """ spi_1 = 100000 spi_2 = 200000 addr_incr = 1 << (32 - raddr_range) dut1_scripts = IPsecUtil._create_ipsec_script_files("DUT1", n_instances) dut2_scripts = IPsecUtil._create_ipsec_script_files("DUT2", n_instances) for cnf in range(0, n_instances): dut1_scripts[cnf].write( "create loopback interface\nset interface state loop0 up\n\n" ) dut2_scripts[cnf].write( f"ip route add {if1_ip_addr}/8 via" f" {ip_address(if2_ip_addr) + cnf + 100} memif1/{cnf + 1}\n\n" ) for tnl in range(0, n_tunnels): cnf = tnl % n_instances ckey = getattr( gen_key(IPsecUtil.get_crypto_alg_key_len(crypto_alg)), "hex" ) integ = "" ikey = getattr( gen_key(IPsecUtil.get_integ_alg_key_len(integ_alg)), "hex" ) if integ_alg: integ = ( f"integ-alg {integ_alg.alg_name}" f" local-integ-key {ikey}" f" remote-integ-key {ikey}" ) # Configure tunnel end point(s) on left side dut1_scripts[cnf].write( "set interface ip address loop0" f" {ip_address(if1_ip_addr) + tnl * addr_incr}/32\n" "create ipsec tunnel" f" local-ip {ip_address(if1_ip_addr) + tnl * addr_incr}" f" local-spi {spi_1 + tnl}" f" remote-ip {ip_address(if2_ip_addr) + cnf}" f" remote-spi {spi_2 + tnl}" f" crypto-alg {crypto_alg.alg_name}" f" local-crypto-key {ckey}" f" remote-crypto-key {ckey}" f" instance {tnl // n_instances}" f" salt 0x0 {integ}\n" f"set interface unnumbered ipip{tnl // n_instances} use loop0\n" f"set interface state ipip{tnl // n_instances} up\n" f"ip route add {ip_address(raddr_ip2)+tnl}/32" f" via ipip{tnl // n_instances}\n\n" ) # Configure tunnel end point(s) on right side dut2_scripts[cnf].write( f"set ip neighbor memif1/{cnf + 1}" f" {ip_address(if1_ip_addr) + tnl * addr_incr}" f" 02:02:00:00:{17:02X}:{cnf:02X} static\n" f"create ipsec tunnel local-ip {ip_address(if2_ip_addr) + cnf}" f" local-spi {spi_2 + tnl}" f" remote-ip {ip_address(if1_ip_addr) + tnl * addr_incr}" f" remote-spi {spi_1 + tnl}" f" crypto-alg {crypto_alg.alg_name}" f" local-crypto-key {ckey}" f" remote-crypto-key {ckey}" f" instance {tnl // n_instances}" f" salt 0x0 {integ}\n" f"set interface unnumbered ipip{tnl // n_instances}" f" use memif1/{cnf + 1}\n" f"set interface state ipip{tnl // n_instances} up\n" f"ip route add {ip_address(raddr_ip1) + tnl}/32" f" via ipip{tnl // n_instances}\n\n" ) IPsecUtil._close_and_copy_ipsec_script_files( "DUT1", nodes, n_instances, dut1_scripts ) IPsecUtil._close_and_copy_ipsec_script_files( "DUT2", nodes, n_instances, dut2_scripts ) @staticmethod def vpp_ipsec_add_multiple_tunnels( nodes, interface1, interface2, n_tunnels, crypto_alg, integ_alg, tunnel_ip1, tunnel_ip2, raddr_ip1, raddr_ip2, raddr_range, tunnel_addr_incr=True, ): """Create multiple IPsec tunnels between two VPP nodes. :param nodes: VPP nodes to create tunnels. :param interface1: Interface name or sw_if_index on node 1. :param interface2: Interface name or sw_if_index on node 2. :param n_tunnels: Number of tunnels to create. :param crypto_alg: The encryption algorithm name. :param integ_alg: The integrity algorithm name. :param tunnel_ip1: Tunnel node1 IPv4 address. :param tunnel_ip2: Tunnel node2 IPv4 address. :param raddr_ip1: Policy selector remote IPv4 start address for the first tunnel in direction node1->node2. :param raddr_ip2: Policy selector remote IPv4 start address for the first tunnel in direction node2->node1. :param raddr_range: Mask specifying range of Policy selector Remote IPv4 addresses. Valid values are from 1 to 32. :param tunnel_addr_incr: Enable or disable tunnel IP address incremental step. :type nodes: dict :type interface1: str or int :type interface2: str or int :type n_tunnels: int :type crypto_alg: CryptoAlg :type integ_alg: Optional[IntegAlg] :type tunnel_ip1: str :type tunnel_ip2: str :type raddr_ip1: string :type raddr_ip2: string :type raddr_range: int :type tunnel_addr_incr: bool """ spd_id = 1 p_hi = 100 p_lo = 10 sa_id_1 = 100000 sa_id_2 = 200000 spi_1 = 300000 spi_2 = 400000 crypto_key = gen_key( IPsecUtil.get_crypto_alg_key_len(crypto_alg) ).decode() integ_key = ( gen_key(IPsecUtil.get_integ_alg_key_len(integ_alg)).decode() if integ_alg else "" ) rmac = ( Topology.get_interface_mac(nodes["DUT2"], interface2) if "DUT2" in nodes.keys() else Topology.get_interface_mac(nodes["TG"], interface2) ) IPsecUtil.vpp_ipsec_set_ip_route( nodes["DUT1"], n_tunnels, tunnel_ip1, raddr_ip2, tunnel_ip2, interface1, raddr_range, rmac, ) IPsecUtil.vpp_ipsec_add_spd(nodes["DUT1"], spd_id) IPsecUtil.vpp_ipsec_spd_add_if(nodes["DUT1"], spd_id, interface1) addr_incr = ( 1 << (128 - 96) if ip_address(tunnel_ip1).version == 6 else 1 << (32 - 24) ) for i in range(n_tunnels // (addr_incr**2) + 1): dut1_local_outbound_range = ip_network( f"{ip_address(tunnel_ip1) + i*(addr_incr**3)}/8", False ).with_prefixlen dut1_remote_outbound_range = ip_network( f"{ip_address(tunnel_ip2) + i*(addr_incr**3)}/8", False ).with_prefixlen IPsecUtil.vpp_ipsec_add_spd_entry( nodes["DUT1"], spd_id, p_hi, PolicyAction.BYPASS, inbound=False, proto=50, laddr_range=dut1_local_outbound_range, raddr_range=dut1_remote_outbound_range, ) IPsecUtil.vpp_ipsec_add_spd_entry( nodes["DUT1"], spd_id, p_hi, PolicyAction.BYPASS, inbound=True, proto=50, laddr_range=dut1_remote_outbound_range, raddr_range=dut1_local_outbound_range, ) IPsecUtil.vpp_ipsec_add_sad_entries( nodes["DUT1"], n_tunnels, sa_id_1, spi_1, crypto_alg, crypto_key, integ_alg, integ_key, tunnel_ip1, tunnel_ip2, tunnel_addr_incr, ) IPsecUtil.vpp_ipsec_add_spd_entries( nodes["DUT1"], n_tunnels, spd_id, priority=ObjIncrement(p_lo, 0), action=PolicyAction.PROTECT, inbound=False, sa_id=ObjIncrement(sa_id_1, 1), raddr_range=NetworkIncrement(ip_network(raddr_ip2)), ) IPsecUtil.vpp_ipsec_add_sad_entries( nodes["DUT1"], n_tunnels, sa_id_2, spi_2, crypto_alg, crypto_key, integ_alg, integ_key, tunnel_ip2, tunnel_ip1, tunnel_addr_incr, ) IPsecUtil.vpp_ipsec_add_spd_entries( nodes["DUT1"], n_tunnels, spd_id, priority=ObjIncrement(p_lo, 0), action=PolicyAction.PROTECT, inbound=True, sa_id=ObjIncrement(sa_id_2, 1), raddr_range=NetworkIncrement(ip_network(raddr_ip1)), ) if "DUT2" in nodes.keys(): rmac = Topology.get_interface_mac(nodes["DUT1"], interface1) IPsecUtil.vpp_ipsec_set_ip_route( nodes["DUT2"], n_tunnels, tunnel_ip2, raddr_ip1, tunnel_ip1, interface2, raddr_range, rmac, ) IPsecUtil.vpp_ipsec_add_spd(nodes["DUT2"], spd_id) IPsecUtil.vpp_ipsec_spd_add_if(nodes["DUT2"], spd_id, interface2) for i in range(n_tunnels // (addr_incr**2) + 1): dut2_local_outbound_range = ip_network( f"{ip_address(tunnel_ip1) + i*(addr_incr**3)}/8", False ).with_prefixlen dut2_remote_outbound_range = ip_network( f"{ip_address(tunnel_ip2) + i*(addr_incr**3)}/8", False ).with_prefixlen IPsecUtil.vpp_ipsec_add_spd_entry( nodes["DUT2"], spd_id, p_hi, PolicyAction.BYPASS, inbound=False, proto=50, laddr_range=dut2_remote_outbound_range, raddr_range=dut2_local_outbound_range, ) IPsecUtil.vpp_ipsec_add_spd_entry( nodes["DUT2"], spd_id, p_hi, PolicyAction.BYPASS, inbound=True, proto=50, laddr_range=dut2_local_outbound_range, raddr_range=dut2_remote_outbound_range, ) IPsecUtil.vpp_ipsec_add_sad_entries( nodes["DUT2"], n_tunnels, sa_id_1, spi_1, crypto_alg, crypto_key, integ_alg, integ_key, tunnel_ip1, tunnel_ip2, tunnel_addr_incr, ) IPsecUtil.vpp_ipsec_add_spd_entries( nodes["DUT2"], n_tunnels, spd_id, priority=ObjIncrement(p_lo, 0), action=PolicyAction.PROTECT, inbound=True, sa_id=ObjIncrement(sa_id_1, 1), raddr_range=NetworkIncrement(ip_network(raddr_ip2)), ) IPsecUtil.vpp_ipsec_add_sad_entries( nodes["DUT2"], n_tunnels, sa_id_2, spi_2, crypto_alg, crypto_key, integ_alg, integ_key, tunnel_ip2, tunnel_ip1, tunnel_addr_incr, ) IPsecUtil.vpp_ipsec_add_spd_entries( nodes["DUT2"], n_tunnels, spd_id, priority=ObjIncrement(p_lo, 0), action=PolicyAction.PROTECT, inbound=False, sa_id=ObjIncrement(sa_id_2, 1), raddr_range=NetworkIncrement(ip_network(raddr_ip1)), ) @staticmethod def vpp_ipsec_show_all(node): """Run "show ipsec all" debug CLI command. :param node: Node to run command on. :type node: dict """ PapiSocketExecutor.run_cli_cmd(node, "show ipsec all") @staticmethod def show_ipsec_security_association(node): """Show IPSec security association. :param node: DUT node. :type node: dict """ cmd = "ipsec_sa_v5_dump" PapiSocketExecutor.dump_and_log(node, [cmd]) @staticmethod def vpp_ipsec_flow_enable_rss(node, proto, rss_type, function="default"): """Ipsec flow enable rss action. :param node: DUT node. :param proto: The flow protocol. :param rss_type: RSS type. :param function: RSS function. :type node: dict :type proto: str :type rss_type: str :type function: str :returns: flow_index. """ # TODO: to be fixed to use full PAPI when it is ready in VPP cmd = ( f"test flow add src-ip any proto {proto} rss function" f" {function} rss types {rss_type}" ) stdout = PapiSocketExecutor.run_cli_cmd(node, cmd) flow_index = stdout.split()[1] return flow_index @staticmethod def vpp_create_ipsec_flows_on_dut( node, n_flows, rx_queues, spi_start, interface ): """Create mutiple ipsec flows and enable flows onto interface. :param node: DUT node. :param n_flows: Number of flows to create. :param rx_queues: NUmber of RX queues. :param spi_start: The start spi. :param interface: Name of the interface. :type node: dict :type n_flows: int :type rx_queues: int :type spi_start: int :type interface: str :returns: flow_index. """ for i in range(0, n_flows): rx_queue = i % rx_queues spi = spi_start + i flow_index = FlowUtil.vpp_create_ip4_ipsec_flow( node, "ESP", spi, "redirect-to-queue", value=rx_queue ) FlowUtil.vpp_flow_enable(node, interface, flow_index)