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NEWS
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strongswan-5.2.0
----------------
- strongSwan has been ported to the Windows platform. Using a MinGW toolchain,
many parts of the strongSwan codebase run natively on Windows 7 / 2008 R2
and newer releases. charon-svc implements a Windows IKE service based on
libcharon, the kernel-iph and kernel-wfp plugins act as networking and IPsec
backend on the Windows platform. socket-win provides a native IKE socket
implementation, while winhttp fetches CRL and OCSP information using the
WinHTTP API.
- The new vici plugin provides a Versatile IKE Configuration Interface for
charon. Using the stable IPC interface, external applications can configure,
control and monitor the IKE daemon. Instead of scripting the ipsec tool
and generating ipsec.conf, third party applications can use the new interface
for more control and better reliability.
- Built upon the libvici client library, swanctl implements the first user of
the VICI interface. Together with a swanctl.conf configuration file,
connections can be defined, loaded and managed. swanctl provides a portable,
complete IKE configuration and control interface for the command line.
The first six swanctl example scenarios have been added.
- The SWID IMV implements a JSON-based REST API which allows the exchange
of SWID tags and Software IDs with the strongTNC policy manager.
- The SWID IMC can extract all installed packages from the dpkg (Debian,
Ubuntu, Linux Mint etc.), rpm (Fedora, RedHat, OpenSUSE, etc.), or
pacman (Arch Linux, Manjaro, etc.) package managers, respectively, using the
swidGenerator (https://github.com/strongswan/swidGenerator) which generates
SWID tags according to the new ISO/IEC 19770-2:2014 standard.
- All IMVs now share the access requestor ID, device ID and product info
of an access requestor via a common imv_session object.
- The Attestation IMC/IMV pair supports the IMA-NG measurement format
introduced with the Linux 3.13 kernel.
- The aikgen tool generates an Attestation Identity Key bound to a TPM.
- Implemented the PT-EAP transport protocol (RFC 7171) for Trusted Network
Connect.
- The ipsec.conf replay_window option defines connection specific IPsec replay
windows. Original patch courtesy of Zheng Zhong and Christophe Gouault from
6Wind.
strongswan-5.1.3
----------------
- Fixed an authentication bypass vulnerability triggered by rekeying an
unestablished IKEv2 SA while it gets actively initiated. This allowed an
attacker to trick a peer's IKE_SA state to established, without the need to
provide any valid authentication credentials. The vulnerability has been
registered as CVE-2014-2338.
- The acert plugin evaluates X.509 Attribute Certificates. Group membership
information encoded as strings can be used to fulfill authorization checks
defined with the rightgroups option. Attribute Certificates can be loaded
locally or get exchanged in IKEv2 certificate payloads.
- The pki command gained support to generate X.509 Attribute Certificates
using the --acert subcommand, while the --print command supports the ac type.
The openac utility has been removed in favor of the new pki functionality.
- The libtls TLS 1.2 implementation as used by EAP-(T)TLS and other protocols
has been extended by AEAD mode support, currently limited to AES-GCM.
strongswan-5.1.2
----------------
- A new default configuration file layout is introduced. The new default
strongswan.conf file mainly includes config snippets from the strongswan.d
and strongswan.d/charon directories (the latter containing snippets for all
plugins). The snippets, with commented defaults, are automatically
generated and installed, if they don't exist yet. They are also installed
in $prefix/share/strongswan/templates so existing files can be compared to
the current defaults.
- As an alternative to the non-extensible charon.load setting, the plugins
to load in charon (and optionally other applications) can now be determined
via the charon.plugins.<name>.load setting for each plugin (enabled in the
new default strongswan.conf file via the charon.load_modular option).
The load setting optionally takes a numeric priority value that allows
reordering the plugins (otherwise the default plugin order is preserved).
- All strongswan.conf settings that were formerly defined in library specific
"global" sections are now application specific (e.g. settings for plugins in
libstrongswan.plugins can now be set only for charon in charon.plugins).
The old options are still supported, which now allows to define defaults for
all applications in the libstrongswan section.
- The ntru libstrongswan plugin supports NTRUEncrypt as a post-quantum
computer IKE key exchange mechanism. The implementation is based on the
ntru-crypto library from the NTRUOpenSourceProject. The supported security
strengths are ntru112, ntru128, ntru192, and ntru256. Since the private DH
group IDs 1030..1033 have been assigned, the strongSwan Vendor ID must be
sent (charon.send_vendor_id = yes) in order to use NTRU.
- Defined a TPMRA remote attestation workitem and added support for it to the
Attestation IMV.
- Compatibility issues between IPComp (compress=yes) and leftfirewall=yes as
well as multiple subnets in left|rightsubnet have been fixed.
- When enabling its "session" strongswan.conf option, the xauth-pam plugin opens
and closes a PAM session for each established IKE_SA. Patch courtesy of
Andrea Bonomi.
- The strongSwan unit testing framework has been rewritten without the "check"
dependency for improved flexibility and portability. It now properly supports
multi-threaded and memory leak testing and brings a bunch of new test cases.
strongswan-5.1.1
----------------
- Fixed a denial-of-service vulnerability and potential authorization bypass
triggered by a crafted ID_DER_ASN1_DN ID payload. The cause is an insufficient
length check when comparing such identities. The vulnerability has been
registered as CVE-2013-6075.
- Fixed a denial-of-service vulnerability triggered by a crafted IKEv1
fragmentation payload. The cause is a NULL pointer dereference. The
vulnerability has been registered as CVE-2013-6076.
- The lean stand-alone pt-tls-client can set up a RFC 6876 PT-TLS session
with a strongSwan policy enforcement point which uses the tnc-pdp charon
plugin.
- The new TCG TNC SWID IMC/IMV pair supports targeted SWID requests for either
full SWID Tag or concise SWID Tag ID inventories.
- The XAuth backend in eap-radius now supports multiple XAuth exchanges for
different credential types and display messages. All user input gets
concatenated and verified with a single User-Password RADIUS attribute on
the AAA. With an AAA supporting it, one for example can implement
Password+Token authentication with proper dialogs on iOS and OS X clients.
- charon supports IKEv1 Mode Config exchange in push mode. The ipsec.conf
modeconfig=push option enables it for both client and server, the same way
as pluto used it.
- Using the "ah" ipsec.conf keyword on both IKEv1 and IKEv2 connections,
charon can negotiate and install Security Associations integrity-protected by
the Authentication Header protocol. Supported are plain AH(+IPComp) SAs only,
but not the deprecated RFC2401 style ESP+AH bundles.
- The generation of initialization vectors for IKE and ESP (when using libipsec)
is now modularized and IVs for e.g. AES-GCM are now correctly allocated
sequentially, while other algorithms like AES-CBC still use random IVs.
- The left and right options in ipsec.conf can take multiple address ranges
and subnets. This allows connection matching against a larger set of
addresses, for example to use a different connection for clients connecting
from a internal network.
- For all those who have a queasy feeling about the NIST elliptic curve set,
the Brainpool curves introduced for use with IKE by RFC 6932 might be a
more trustworthy alternative.
- The kernel-libipsec userland IPsec backend now supports usage statistics,
volume based rekeying and accepts ESPv3 style TFC padded packets.
- With two new strongswan.conf options fwmarks can be used to implement
host-to-host tunnels with kernel-libipsec.
- load-tester supports transport mode connections and more complex traffic
selectors, including such using unique ports for each tunnel.
- The new dnscert plugin provides support for authentication via CERT RRs that
are protected via DNSSEC. The plugin was created by Ruslan N. Marchenko.
- The eap-radius plugin supports forwarding of several Cisco Unity specific
RADIUS attributes in corresponding configuration payloads.
- Database transactions are now abstracted and implemented by the two backends.
If you use MySQL make sure all tables use the InnoDB engine.
- libstrongswan now can provide an experimental custom implementation of the
printf family functions based on klibc if neither Vstr nor glibc style printf
hooks are available. This can avoid the Vstr dependency on some systems at
the cost of slower and less complete printf functions.
strongswan-5.1.0
----------------
- Fixed a denial-of-service vulnerability triggered by specific XAuth usernames
and EAP identities (since 5.0.3), and PEM files (since 4.1.11). The crash
was caused by insufficient error handling in the is_asn1() function.
The vulnerability has been registered as CVE-2013-5018.
- The new charon-cmd command line IKE client can establish road warrior
connections using IKEv1 or IKEv2 with different authentication profiles.
It does not depend on any configuration files and can be configured using a
few simple command line options.
- The kernel-pfroute networking backend has been greatly improved. It now
can install virtual IPs on TUN devices on OS X and FreeBSD, allowing these
systems to act as a client in common road warrior scenarios.
- The new kernel-libipsec plugin uses TUN devices and libipsec to provide IPsec
processing in userland on Linux, FreeBSD and Mac OS X.
- The eap-radius plugin can now serve as an XAuth backend called xauth-radius,
directly verifying XAuth credentials using RADIUS User-Name/User-Password
attributes. This is more efficient than the existing xauth-eap+eap-radius
combination, and allows RADIUS servers without EAP support to act as AAA
backend for IKEv1.
- The new osx-attr plugin installs configuration attributes (currently DNS
servers) via SystemConfiguration on Mac OS X. The keychain plugin provides
certificates from the OS X keychain service.
- The sshkey plugin parses SSH public keys, which, together with the --agent
option for charon-cmd, allows the use of ssh-agent for authentication.
To configure SSH keys in ipsec.conf the left|rightrsasigkey options are
replaced with left|rightsigkey, which now take public keys in one of three
formats: SSH (RFC 4253, ssh: prefix), DNSKEY (RFC 3110, dns: prefix), and
PKCS#1 (the default, no prefix).
- Extraction of certificates and private keys from PKCS#12 files is now provided
by the new pkcs12 plugin or the openssl plugin. charon-cmd (--p12) as well
as charon (via P12 token in ipsec.secrets) can make use of this.
- IKEv2 can now negotiate transport mode and IPComp in NAT situations.
- IKEv2 exchange initiators now properly close an established IKE or CHILD_SA
on error conditions using an additional exchange, keeping state in sync
between peers.
- Using a SQL database interface a Trusted Network Connect (TNC) Policy Manager
can generate specific measurement workitems for an arbitrary number of
Integrity Measurement Verifiers (IMVs) based on the history of the VPN user
and/or device.
- Several core classes in libstrongswan are now tested with unit tests. These
can be enabled with --enable-unit-tests and run with 'make check'. Coverage
reports can be generated with --enable-coverage and 'make coverage' (this
disables any optimization, so it should not be enabled when building
production releases).
- The leak-detective developer tool has been greatly improved. It works much
faster/stabler with multiple threads, does not use deprecated malloc hooks
anymore and has been ported to OS X.
- chunk_hash() is now based on SipHash-2-4 with a random key. This provides
better distribution and prevents hash flooding attacks when used with
hashtables.
- All default plugins implement the get_features() method to define features
and their dependencies. The plugin loader has been improved, so that plugins
in a custom load statement can be ordered freely or to express preferences
without being affected by dependencies between plugin features.
- A centralized thread can take care for watching multiple file descriptors
concurrently. This removes the need for a dedicated listener threads in
various plugins. The number of "reserved" threads for such tasks has been
reduced to about five, depending on the plugin configuration.
- Plugins that can be controlled by a UNIX socket IPC mechanism gained network
transparency. Third party applications querying these plugins now can use
TCP connections from a different host.
- libipsec now supports AES-GCM.
strongswan-5.0.4
----------------
- Fixed a security vulnerability in the openssl plugin which was reported by
Kevin Wojtysiak. The vulnerability has been registered as CVE-2013-2944.
Before the fix, if the openssl plugin's ECDSA signature verification was used,
due to a misinterpretation of the error code returned by the OpenSSL
ECDSA_verify() function, an empty or zeroed signature was accepted as a
legitimate one.
- The handling of a couple of other non-security relevant openssl return codes
was fixed as well.
- The tnc_ifmap plugin now publishes virtual IPv4 and IPv6 addresses via its
TCG TNC IF-MAP 2.1 interface.
- The charon.initiator_only option causes charon to ignore IKE initiation
requests.
- The openssl plugin can now use the openssl-fips library.
strongswan-5.0.3
----------------
- The new ipseckey plugin enables authentication based on trustworthy public
keys stored as IPSECKEY resource records in the DNS and protected by DNSSEC.
To do so it uses a DNSSEC enabled resolver, like the one provided by the new
unbound plugin, which is based on libldns and libunbound. Both plugins were
created by Reto Guadagnini.
- Implemented the TCG TNC IF-IMV 1.4 draft making access requestor identities
available to an IMV. The OS IMV stores the AR identity together with the
device ID in the attest database.
- The openssl plugin now uses the AES-NI accelerated version of AES-GCM
if the hardware supports it.
- The eap-radius plugin can now assign virtual IPs to IKE clients using the
Framed-IP-Address attribute by using the "%radius" named pool in the
rightsourceip ipsec.conf option. Cisco Banner attributes are forwarded to
Unity-capable IKEv1 clients during mode config. charon now sends Interim
Accounting updates if requested by the RADIUS server, reports
sent/received packets in Accounting messages, and adds a Terminate-Cause
to Accounting-Stops.
- The recently introduced "ipsec listcounters" command can report connection
specific counters by passing a connection name, and global or connection
counters can be reset by the "ipsec resetcounters" command.
- The strongSwan libpttls library provides an experimental implementation of
PT-TLS (RFC 6876), a Posture Transport Protocol over TLS.
- The charon systime-fix plugin can disable certificate lifetime checks on
embedded systems if the system time is obviously out of sync after bootup.
Certificates lifetimes get checked once the system time gets sane, closing
or reauthenticating connections using expired certificates.
- The "ikedscp" ipsec.conf option can set DiffServ code points on outgoing
IKE packets.
- The new xauth-noauth plugin allows to use basic RSA or PSK authentication with
clients that cannot be configured without XAuth authentication. The plugin
simply concludes the XAuth exchange successfully without actually performing
any authentication. Therefore, to use this backend it has to be selected
explicitly with rightauth2=xauth-noauth.
- The new charon-tkm IKEv2 daemon delegates security critical operations to a
separate process. This has the benefit that the network facing daemon has no
knowledge of keying material used to protect child SAs. Thus subverting
charon-tkm does not result in the compromise of cryptographic keys.
The extracted functionality has been implemented from scratch in a minimal TCB
(trusted computing base) in the Ada programming language. Further information
can be found at http://www.codelabs.ch/tkm/.
strongswan-5.0.2
----------------
- Implemented all IETF Standard PA-TNC attributes and an OS IMC/IMV
pair using them to transfer operating system information.
- The new "ipsec listcounters" command prints a list of global counter values
about received and sent IKE messages and rekeyings.
- A new lookip plugin can perform fast lookup of tunnel information using a
clients virtual IP and can send notifications about established or deleted
tunnels. The "ipsec lookip" command can be used to query such information
or receive notifications.
- The new error-notify plugin catches some common error conditions and allows
an external application to receive notifications for them over a UNIX socket.
- IKE proposals can now use a PRF algorithm different to that defined for
integrity protection. If an algorithm with a "prf" prefix is defined
explicitly (such as prfsha1 or prfsha256), no implicit PRF algorithm based on
the integrity algorithm is added to the proposal.
- The pkcs11 plugin can now load leftcert certificates from a smartcard for a
specific ipsec.conf conn section and cacert CA certificates for a specific ca
section.
- The load-tester plugin gained additional options for certificate generation
and can load keys and multiple CA certificates from external files. It can
install a dedicated outer IP address for each tunnel and tunnel initiation
batches can be triggered and monitored externally using the
"ipsec load-tester" tool.
- PKCS#7 container parsing has been modularized, and the openssl plugin
gained an alternative implementation to decrypt and verify such files.
In contrast to our own DER parser, OpenSSL can handle BER files, which is
required for interoperability of our scepclient with EJBCA.
- Support for the proprietary IKEv1 fragmentation extension has been added.
Fragments are always handled on receipt but only sent if supported by the peer
and if enabled with the new fragmentation ipsec.conf option.
- IKEv1 in charon can now parse certificates received in PKCS#7 containers and
supports NAT traversal as used by Windows clients. Patches courtesy of
Volker Rümelin.
- The new rdrand plugin provides a high quality / high performance random
source using the Intel rdrand instruction found on Ivy Bridge processors.
- The integration test environment was updated and now uses KVM and reproducible
guest images based on Debian.
strongswan-5.0.1
----------------
- Introduced the sending of the standard IETF Assessment Result
PA-TNC attribute by all strongSwan Integrity Measurement Verifiers.
- Extended PTS Attestation IMC/IMV pair to provide full evidence of
the Linux IMA measurement process. All pertinent file information
of a Linux OS can be collected and stored in an SQL database.
- The PA-TNC and PB-TNC protocols can now process huge data payloads
>64 kB by distributing PA-TNC attributes over multiple PA-TNC messages
and these messages over several PB-TNC batches. As long as no
consolidated recommandation from all IMVs can be obtained, the TNC
server requests more client data by sending an empty SDATA batch.
- The rightgroups2 ipsec.conf option can require group membership during
a second authentication round, for example during XAuth authentication
against a RADIUS server.
- The xauth-pam backend can authenticate IKEv1 XAuth and Hybrid authenticated
clients against any PAM service. The IKEv2 eap-gtc plugin does not use
PAM directly anymore, but can use any XAuth backend to verify credentials,
including xauth-pam.
- The new unity plugin brings support for some parts of the IKEv1 Cisco Unity
Extension. As client, charon narrows traffic selectors to the received
Split-Include attributes and automatically installs IPsec bypass policies
for received Local-LAN attributes. As server, charon sends Split-Include
attributes for leftsubnet definitions containing multiple subnets to Unity-
aware clients.
- An EAP-Nak payload is returned by clients if the gateway requests an EAP
method that the client does not support. Clients can also request a specific
EAP method by configuring that method with leftauth.
- The eap-dynamic plugin handles EAP-Nak payloads returned by clients and uses
these to select a different EAP method supported/requested by the client.
The plugin initially requests the first registered method or the first method
configured with charon.plugins.eap-dynamic.preferred.
- The new left/rightdns options specify connection specific DNS servers to
request/respond in IKEv2 configuration payloads or IKEv2 mode config. leftdns
can be any (comma separated) combination of %config4 and %config6 to request
multiple servers, both for IPv4 and IPv6. rightdns takes a list of DNS server
IP addresses to return.
- The left/rightsourceip options now accept multiple addresses or pools.
leftsourceip can be any (comma separated) combination of %config4, %config6
or fixed IP addresses to request. rightsourceip accepts multiple explicitly
specified or referenced named pools.
- Multiple connections can now share a single address pool when they use the
same definition in one of the rightsourceip pools.
- The options charon.interfaces_ignore and charon.interfaces_use allow one to
configure the network interfaces used by the daemon.
- The kernel-netlink plugin supports the charon.install_virtual_ip_on option,
which specifies the interface on which virtual IP addresses will be installed.
If it is not specified the current behavior of using the outbound interface
is preserved.
- The kernel-netlink plugin tries to keep the current source address when
looking for valid routes to reach other hosts.
- The autotools build has been migrated to use a config.h header. strongSwan
development headers will get installed during "make install" if
--with-dev-headers has been passed to ./configure.
- All crypto primitives gained return values for most operations, allowing
crypto backends to fail, for example when using hardware accelerators.
strongswan-5.0.0
----------------
- The charon IKE daemon gained experimental support for the IKEv1 protocol.
Pluto has been removed from the 5.x series, and unless strongSwan is
configured with --disable-ikev1 or --disable-ikev2, charon handles both
keying protocols. The feature-set of IKEv1 in charon is almost on par with
pluto, but currently does not support AH or bundled AH+ESP SAs. Beside
RSA/ECDSA, PSK and XAuth, charon also supports the Hybrid authentication
mode. Informations for interoperability and migration is available at
http://wiki.strongswan.org/projects/strongswan/wiki/CharonPlutoIKEv1.
- Charon's bus_t has been refactored so that loggers and other listeners are
now handled separately. The single lock was previously cause for deadlocks
if extensive listeners, such as the one provided by the updown plugin, wanted
to acquire locks that were held by other threads which in turn tried to log
messages, and thus were waiting to acquire the same lock currently held by
the thread calling the listener.
The implemented changes also allow the use of a read/write-lock for the
loggers which increases performance if multiple loggers are registered.
Besides several interface changes this last bit also changes the semantics
for loggers as these may now be called by multiple threads at the same time.
- Source routes are reinstalled if interfaces are reactivated or IP addresses
reappear.
- The thread pool (processor_t) now has more control over the lifecycle of
a job (see job.h for details). In particular, it now controls the destruction
of jobs after execution and the cancellation of jobs during shutdown. Due to
these changes the requeueing feature, previously available to callback_job_t
only, is now available to all jobs (in addition to a new rescheduling
feature).
- In addition to trustchain key strength definitions for different public key
systems, the rightauth option now takes a list of signature hash algorithms
considered save for trustchain validation. For example, the setting
rightauth=rsa-2048-ecdsa-256-sha256-sha384-sha512 requires a trustchain
that uses at least RSA-2048 or ECDSA-256 keys and certificate signatures
using SHA-256 or better.
strongswan-4.6.4
----------------
- Fixed a security vulnerability in the gmp plugin. If this plugin was used
for RSA signature verification an empty or zeroed signature was handled as
a legitimate one.
- Fixed several issues with reauthentication and address updates.
strongswan-4.6.3
----------------
- The tnc-pdp plugin implements a RADIUS server interface allowing
a strongSwan TNC server to act as a Policy Decision Point.
- The eap-radius authentication backend enforces Session-Timeout attributes
using RFC4478 repeated authentication and acts upon RADIUS Dynamic
Authorization extensions, RFC 5176. Currently supported are disconnect
requests and CoA messages containing a Session-Timeout.
- The eap-radius plugin can forward arbitrary RADIUS attributes from and to
clients using custom IKEv2 notify payloads. The new radattr plugin reads
attributes to include from files and prints received attributes to the
console.
- Added support for untruncated MD5 and SHA1 HMACs in ESP as used in
RFC 4595.
- The cmac plugin implements the AES-CMAC-96 and AES-CMAC-PRF-128 algorithms
as defined in RFC 4494 and RFC 4615, respectively.
- The resolve plugin automatically installs nameservers via resolvconf(8),
if it is installed, instead of modifying /etc/resolv.conf directly.
- The IKEv2 charon daemon supports now raw RSA public keys in RFC 3110
DNSKEY and PKCS#1 file format.
strongswan-4.6.2
----------------
- Upgraded the TCG IF-IMC and IF-IMV C API to the upcoming version 1.3
which supports IF-TNCCS 2.0 long message types, the exclusive flags
and multiple IMC/IMV IDs. Both the TNC Client and Server as well as
the "Test", "Scanner", and "Attestation" IMC/IMV pairs were updated.
- Fully implemented the "TCG Attestation PTS Protocol: Binding to IF-M"
standard (TLV-based messages only). TPM-based remote attestation of
Linux IMA (Integrity Measurement Architecture) possible. Measurement
reference values are automatically stored in an SQLite database.
- The EAP-RADIUS authentication backend supports RADIUS accounting. It sends
start/stop messages containing Username, Framed-IP and Input/Output-Octets
attributes and has been tested against FreeRADIUS and Microsoft NPS.
- Added support for PKCS#8 encoded private keys via the libstrongswan
pkcs8 plugin. This is the default format used by some OpenSSL tools since
version 1.0.0 (e.g. openssl req with -keyout).
- Added session resumption support to the strongSwan TLS stack.
strongswan-4.6.1
----------------
- Because of changing checksums before and after installation which caused
the integrity tests to fail we avoided directly linking libsimaka, libtls and
libtnccs to those libcharon plugins which make use of these dynamic libraries.
Instead we linked the libraries to the charon daemon. Unfortunately Ubuntu
11.10 activated the --as-needed ld option which discards explicit links
to dynamic libraries that are not actually used by the charon daemon itself,
thus causing failures during the loading of the plugins which depend on these
libraries for resolving external symbols.
- Therefore our approach of computing integrity checksums for plugins had to be
changed radically by moving the hash generation from the compilation to the
post-installation phase.
strongswan-4.6.0
----------------
- The new libstrongswan certexpire plugin collects expiration information of
all used certificates and exports them to CSV files. It either directly
exports them or uses cron style scheduling for batch exports.
- starter passes unresolved hostnames to charon, allowing it to do name
resolution not before the connection attempt. This is especially useful with
connections between hosts using dynamic IP addresses. Thanks to Mirko Parthey
for the initial patch.
- The android plugin can now be used without the Android frontend patch and
provides DNS server registration and logging to logcat.
- Pluto and starter (plus stroke and whack) have been ported to Android.
- Support for ECDSA private and public key operations has been added to the
pkcs11 plugin. The plugin now also provides DH and ECDH via PKCS#11 and can
use tokens as random number generators (RNG). By default only private key
operations are enabled, more advanced features have to be enabled by their
option in strongswan.conf. This also applies to public key operations (even
for keys not stored on the token) which were enabled by default before.
- The libstrongswan plugin system now supports detailed plugin dependencies.
Many plugins have been extended to export its capabilities and requirements.
This allows the plugin loader to resolve plugin loading order automatically,
and in future releases, to dynamically load the required features on demand.
Existing third party plugins are source (but not binary) compatible if they
properly initialize the new get_features() plugin function to NULL.
- The tnc-ifmap plugin implements a TNC IF-MAP 2.0 client which can deliver
metadata about IKE_SAs via a SOAP interface to a MAP server. The tnc-ifmap
plugin requires the Apache Axis2/C library.
strongswan-4.5.3
----------------
- Our private libraries (e.g. libstrongswan) are not installed directly in
prefix/lib anymore. Instead a subdirectory is used (prefix/lib/ipsec/ by
default). The plugins directory is also moved from libexec/ipsec/ to that
directory.
- The dynamic IMC/IMV libraries were moved from the plugins directory to
a new imcvs directory in the prefix/lib/ipsec/ subdirectory.
- Job priorities were introduced to prevent thread starvation caused by too
many threads handling blocking operations (such as CRL fetching). Refer to
strongswan.conf(5) for details.
- Two new strongswan.conf options allow to fine-tune performance on IKEv2
gateways by dropping IKE_SA_INIT requests on high load.
- IKEv2 charon daemon supports start PASS and DROP shunt policies
preventing traffic to go through IPsec connections. Installation of the
shunt policies either via the XFRM netfilter or PFKEYv2 IPsec kernel
interfaces.
- The history of policies installed in the kernel is now tracked so that e.g.
trap policies are correctly updated when reauthenticated SAs are terminated.
- IMC/IMV Scanner pair implementing the RFC 5792 PA-TNC (IF-M) protocol.
Using "netstat -l" the IMC scans open listening ports on the TNC client
and sends a port list to the IMV which based on a port policy decides if
the client is admitted to the network.
(--enable-imc-scanner/--enable-imv-scanner).
- IMC/IMV Test pair implementing the RFC 5792 PA-TNC (IF-M) protocol.
(--enable-imc-test/--enable-imv-test).
- The IKEv2 close action does not use the same value as the ipsec.conf dpdaction
setting, but the value defined by its own closeaction keyword. The action
is triggered if the remote peer closes a CHILD_SA unexpectedly.
strongswan-4.5.2
----------------
- The whitelist plugin for the IKEv2 daemon maintains an in-memory identity
whitelist. Any connection attempt of peers not whitelisted will get rejected.
The 'ipsec whitelist' utility provides a simple command line frontend for
whitelist administration.
- The duplicheck plugin provides a specialized form of duplicate checking,
doing a liveness check on the old SA and optionally notify a third party
application about detected duplicates.
- The coupling plugin permanently couples two or more devices by limiting
authentication to previously used certificates.
- In the case that the peer config and child config don't have the same name
(usually in SQL database defined connections), ipsec up|route <peer config>
starts|routes all associated child configs and ipsec up|route <child config>
only starts|routes the specific child config.
- fixed the encoding and parsing of X.509 certificate policy statements (CPS).
- Duncan Salerno contributed the eap-sim-pcsc plugin implementing a
pcsc-lite based SIM card backend.
- The eap-peap plugin implements the EAP PEAP protocol. Interoperates
successfully with a FreeRADIUS server and Windows 7 Agile VPN clients.
- The IKEv2 daemon charon rereads strongswan.conf on SIGHUP and instructs
all plugins to reload. Currently only the eap-radius and the attr plugins
support configuration reloading.
- Added userland support to the IKEv2 daemon for Extended Sequence Numbers
support coming with Linux 2.6.39. To enable ESN on a connection, add
the 'esn' keyword to the proposal. The default proposal uses 32-bit sequence
numbers only ('noesn'), and the same value is used if no ESN mode is
specified. To negotiate ESN support with the peer, include both, e.g.
esp=aes128-sha1-esn-noesn.
- In addition to ESN, Linux 2.6.39 gained support for replay windows larger
than 32 packets. The new global strongswan.conf option 'charon.replay_window'
configures the size of the replay window, in packets.
strongswan-4.5.1
----------------
- Sansar Choinyambuu implemented the RFC 5793 Posture Broker Protocol (BP)
compatible with Trusted Network Connect (TNC). The TNCCS 2.0 protocol
requires the tnccs_20, tnc_imc and tnc_imv plugins but does not depend
on the libtnc library. Any available IMV/IMC pairs conforming to the
Trusted Computing Group's TNC-IF-IMV/IMC 1.2 interface specification
can be loaded via /etc/tnc_config.
- Re-implemented the TNCCS 1.1 protocol by using the tnc_imc and tnc_imv
in place of the external libtnc library.
- The tnccs_dynamic plugin loaded on a TNC server in addition to the
tnccs_11 and tnccs_20 plugins, dynamically detects the IF-TNCCS
protocol version used by a TNC client and invokes an instance of
the corresponding protocol stack.
- IKE and ESP proposals can now be stored in an SQL database using a
new proposals table. The start_action field in the child_configs
tables allows the automatic starting or routing of connections stored
in an SQL database.
- The new certificate_authorities and certificate_distribution_points
tables make it possible to store CRL and OCSP Certificate Distribution
points in an SQL database.
- The new 'include' statement allows to recursively include other files in
strongswan.conf. Existing sections and values are thereby extended and
replaced, respectively.
- Due to the changes in the parser for strongswan.conf, the configuration
syntax for the attr plugin has changed. Previously, it was possible to
specify multiple values of a specific attribute type by adding multiple
key/value pairs with the same key (e.g. dns) to the plugins.attr section.
Because values with the same key now replace previously defined values
this is not possible anymore. As an alternative, multiple values can be
specified by separating them with a comma (e.g. dns = 1.2.3.4, 2.3.4.5).
- ipsec listalgs now appends (set in square brackets) to each crypto
algorithm listed the plugin that registered the function.
- Traffic Flow Confidentiality padding supported with Linux 2.6.38 can be used
by the IKEv2 daemon. The ipsec.conf 'tfc' keyword pads all packets to a given
boundary, the special value '%mtu' pads all packets to the path MTU.
- The new af-alg plugin can use various crypto primitives of the Linux Crypto
API using the AF_ALG interface introduced with 2.6.38. This removes the need
for additional userland implementations of symmetric cipher, hash, hmac and
xcbc algorithms.
- The IKEv2 daemon supports the INITIAL_CONTACT notify as initiator and
responder. The notify is sent when initiating configurations with a unique
policy, set in ipsec.conf via the global 'uniqueids' option.
- The conftest conformance testing framework enables the IKEv2 stack to perform
many tests using a distinct tool and configuration frontend. Various hooks
can alter reserved bits, flags, add custom notifies and proposals, reorder
or drop messages and much more. It is enabled using the --enable-conftest
./configure switch.
- The new libstrongswan constraints plugin provides advanced X.509 constraint
checking. In addition to X.509 pathLen constraints, the plugin checks for
nameConstraints and certificatePolicies, including policyMappings and
policyConstraints. The x509 certificate plugin and the pki tool have been
enhanced to support these extensions. The new left/rightcertpolicy ipsec.conf
connection keywords take OIDs a peer certificate must have.
- The left/rightauth ipsec.conf keywords accept values with a minimum strength
for trustchain public keys in bits, such as rsa-2048 or ecdsa-256.
- The revocation and x509 libstrongswan plugins and the pki tool gained basic
support for delta CRLs.
strongswan-4.5.0
----------------
- IMPORTANT: the default keyexchange mode 'ike' is changing with release 4.5
from 'ikev1' to 'ikev2', thus commemorating the five year anniversary of the
IKEv2 RFC 4306 and its mature successor RFC 5996. The time has definitively
come for IKEv1 to go into retirement and to cede its place to the much more
robust, powerful and versatile IKEv2 protocol!
- Added new ctr, ccm and gcm plugins providing Counter, Counter with CBC-MAC
and Galois/Counter Modes based on existing CBC implementations. These
new plugins bring support for AES and Camellia Counter and CCM algorithms
and the AES GCM algorithms for use in IKEv2.
- The new pkcs11 plugin brings full Smartcard support to the IKEv2 daemon and
the pki utility using one or more PKCS#11 libraries. It currently supports
RSA private and public key operations and loads X.509 certificates from
tokens.
- Implemented a general purpose TLS stack based on crypto and credential
primitives of libstrongswan. libtls supports TLS versions 1.0, 1.1 and 1.2,
ECDHE-ECDSA/RSA, DHE-RSA and RSA key exchange algorithms and RSA/ECDSA based
client authentication.
- Based on libtls, the eap-tls plugin brings certificate based EAP
authentication for client and server. It is compatible to Windows 7 IKEv2
Smartcard authentication and the OpenSSL based FreeRADIUS EAP-TLS backend.
- Implemented the TNCCS 1.1 Trusted Network Connect protocol using the
libtnc library on the strongSwan client and server side via the tnccs_11
plugin and optionally connecting to a TNC@FHH-enhanced FreeRADIUS AAA server.
Depending on the resulting TNC Recommendation, strongSwan clients are granted
access to a network behind a strongSwan gateway (allow), are put into a
remediation zone (isolate) or are blocked (none), respectively. Any number
of Integrity Measurement Collector/Verifier pairs can be attached
via the tnc-imc and tnc-imv charon plugins.
- The IKEv1 daemon pluto now uses the same kernel interfaces as the IKEv2
daemon charon. As a result of this, pluto now supports xfrm marks which
were introduced in charon with 4.4.1.
- Applets for Maemo 5 (Nokia) allow to easily configure and control IKEv2
based VPN connections with EAP authentication on supported devices.
- The RADIUS plugin eap-radius now supports multiple RADIUS servers for
redundant setups. Servers are selected by a defined priority, server load and
availability.
- The simple led plugin controls hardware LEDs through the Linux LED subsystem.
It currently shows activity of the IKE daemon and is a good example how to
implement a simple event listener.
- Improved MOBIKE behavior in several corner cases, for instance, if the
initial responder moves to a different address.
- Fixed left-/rightnexthop option, which was broken since 4.4.0.
- Fixed a bug not releasing a virtual IP address to a pool if the XAUTH
identity was different from the IKE identity.
- Fixed the alignment of ModeConfig messages on 4-byte boundaries in the
case where the attributes are not a multiple of 4 bytes (e.g. Cisco's
UNITY_BANNER).
- Fixed the interoperability of the socket_raw and socket_default
charon plugins.
- Added man page for strongswan.conf
strongswan-4.4.1
----------------
- Support of xfrm marks in IPsec SAs and IPsec policies introduced
with the Linux 2.6.34 kernel. For details see the example scenarios
ikev2/nat-two-rw-mark, ikev2/rw-nat-mark-in-out and ikev2/net2net-psk-dscp.
- The PLUTO_MARK_IN and PLUTO_ESP_ENC environment variables can be used
in a user-specific updown script to set marks on inbound ESP or
ESP_IN_UDP packets.
- The openssl plugin now supports X.509 certificate and CRL functions.
- OCSP/CRL checking in IKEv2 has been moved to the revocation plugin, enabled
by default. Plase update manual load directives in strongswan.conf.
- RFC3779 ipAddrBlock constraint checking has been moved to the addrblock
plugin, disabled by default. Enable it and update manual load directives
in strongswan.conf, if required.
- The pki utility supports CRL generation using the --signcrl command.
- The ipsec pki --self, --issue and --req commands now support output in
PEM format using the --outform pem option.
- The major refactoring of the IKEv1 Mode Config functionality now allows
the transport and handling of any Mode Config attribute.
- The RADIUS proxy plugin eap-radius now supports multiple servers. Configured
servers are chosen randomly, with the option to prefer a specific server.
Non-responding servers are degraded by the selection process.
- The ipsec pool tool manages arbitrary configuration attributes stored
in an SQL database. ipsec pool --help gives the details.
- The new eap-simaka-sql plugin acts as a backend for EAP-SIM and EAP-AKA,
reading triplets/quintuplets from an SQL database.
- The High Availability plugin now supports a HA enabled in-memory address
pool and Node reintegration without IKE_SA rekeying. The latter allows
clients without IKE_SA rekeying support to keep connected during
reintegration. Additionally, many other issues have been fixed in the ha
plugin.
- Fixed a potential remote code execution vulnerability resulting from
the misuse of snprintf(). The vulnerability is exploitable by
unauthenticated users.
strongswan-4.4.0
----------------
- The IKEv2 High Availability plugin has been integrated. It provides
load sharing and failover capabilities in a cluster of currently two nodes,
based on an extend ClusterIP kernel module. More information is available at
http://wiki.strongswan.org/projects/strongswan/wiki/HighAvailability.
The development of the High Availability functionality was sponsored by
secunet Security Networks AG.
- Added IKEv1 and IKEv2 configuration support for the AES-GMAC
authentication-only ESP cipher. Our aes_gmac kernel patch or a Linux
2.6.34 kernel is required to make AES-GMAC available via the XFRM
kernel interface.
- Added support for Diffie-Hellman groups 22, 23 and 24 to the gmp, gcrypt
and openssl plugins, usable by both pluto and charon. The new proposal
keywords are modp1024s160, modp2048s224 and modp2048s256. Thanks to Joy Latten
from IBM for his contribution.
- The IKEv1 pluto daemon supports RAM-based virtual IP pools using
the rightsourceip directive with a subnet from which addresses
are allocated.
- The ipsec pki --gen and --pub commands now allow the output of
private and public keys in PEM format using the --outform pem
command line option.
- The new DHCP plugin queries virtual IP addresses for clients from a DHCP
server using broadcasts, or a defined server using the
charon.plugins.dhcp.server strongswan.conf option. DNS/WINS server information
is additionally served to clients if the DHCP server provides such
information. The plugin is used in ipsec.conf configurations having
rightsourceip set to %dhcp.
- A new plugin called farp fakes ARP responses for virtual IP addresses
handed out to clients from the IKEv2 daemon charon. The plugin lets a
road-warrior act as a client on the local LAN if it uses a virtual IP
from the responders subnet, e.g. acquired using the DHCP plugin.
- The existing IKEv2 socket implementations have been migrated to the
socket-default and the socket-raw plugins. The new socket-dynamic plugin
binds sockets dynamically to ports configured via the left-/rightikeport
ipsec.conf connection parameters.
- The android charon plugin stores received DNS server information as "net.dns"
system properties, as used by the Android platform.
strongswan-4.3.6
----------------
- The IKEv2 daemon supports RFC 3779 IP address block constraints
carried as a critical X.509v3 extension in the peer certificate.
- The ipsec pool --add|del dns|nbns command manages DNS and NBNS name
server entries that are sent via the IKEv1 Mode Config or IKEv2
Configuration Payload to remote clients.
- The Camellia cipher can be used as an IKEv1 encryption algorithm.
- The IKEv1 and IKEV2 daemons now check certificate path length constraints.
- The new ipsec.conf conn option "inactivity" closes a CHILD_SA if no traffic
was sent or received within the given interval. To close the complete IKE_SA
if its only CHILD_SA was inactive, set the global strongswan.conf option
"charon.inactivity_close_ike" to yes.
- More detailed IKEv2 EAP payload information in debug output
- IKEv2 EAP-SIM and EAP-AKA share joint libsimaka library
- Added required userland changes for proper SHA256 and SHA384/512 in ESP that
will be introduced with Linux 2.6.33. The "sha256"/"sha2_256" keyword now
configures the kernel with 128 bit truncation, not the non-standard 96
bit truncation used by previous releases. To use the old 96 bit truncation
scheme, the new "sha256_96" proposal keyword has been introduced.
- Fixed IPComp in tunnel mode, stripping out the duplicated outer header. This
change makes IPcomp tunnel mode connections incompatible with previous
releases; disable compression on such tunnels.
- Fixed BEET mode connections on recent kernels by installing SAs with
appropriate traffic selectors, based on a patch by Michael Rossberg.
- Using extensions (such as BEET mode) and crypto algorithms (such as twofish,
serpent, sha256_96) allocated in the private use space now require that we
know its meaning, i.e. we are talking to strongSwan. Use the new
"charon.send_vendor_id" option in strongswan.conf to let the remote peer know
this is the case.
- Experimental support for draft-eronen-ipsec-ikev2-eap-auth, where the
responder omits public key authentication in favor of a mutual authentication
method. To enable EAP-only authentication, set rightauth=eap on the responder