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ChangeLog
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Because this project is maintained both in the OpenBSD tree using CVS and in
Git, it can be confusing following all of the changes.
Most of the libssl and libcrypto source code is is here in OpenBSD CVS:
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/lib/libssl/
Some of the libcrypto and OS-compatibility files for entropy and random number
generation are here:
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/lib/libcrypto/
A simplified TLS wrapper library is here:
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/lib/libtls/
The LibreSSL Portable project copies these portions of the OpenBSD tree, along
with relevant portions of the C library, to a Git repository. This makes it
easier to follow all of the relevant changes to the upstream project in a
single place:
https://github.com/libressl-portable/openbsd
The portable bits of the project are largely maintained out-of-tree, and their
history is also available from Git.
https://github.com/libressl-portable/portable
LibreSSL Portable Release Notes:
3.0.2 - Stable release
* Use a valid curve when constructing an EC_KEY that looks like X25519.
The recent EC group cofactor change results in stricter validation,
which causes the EC_GROUP_set_generator() call to fail.
Issue reported and fix tested by rsadowski@
* Fixed a padding oracle in PKCS7_dataDecode and CMS_decrypt_set1_pkey.
(Note that the CMS code is currently disabled)
Port of Edlinger's Fix for CVE-2019-1563 from OpenSSL 1.1.1 (old license)
* Avoid a path traversal bug in s_server on Windows when run with the -WWW
or -HTTP options, due to incomplete path check logic.
Issue reported and fix tested by Jobert Abma
3.0.1 - Development release
* Ported Billy Brumley's fix for CVE-2019-1547 in OpenSSL 1.1.1. If a NULL
or zero cofactor is passed to EC_GROUP_set_generator(), try to compute
it using Hasse's bound. This works as long as the cofactor is small
enough.
* Fixed a memory leak in error paths for eckey_type2param().
* Initial work on supporting Cryptographic Message Syntax (CMS) in
libcrypto (not enabled).
* Various manual page improvements and additions.
* Added a CMake check for an existing uninstall target, facilitating
embedding LibreSSL in larger CMake projects, from Matthew Albrecht.
3.0.0 - Development release
* Completed the port of RSA_METHOD accessors from the OpenSSL 1.1 API.
* Documented undescribed options and removed unfunctional options
description in openssl(1) manual.
* A plethora of small fixes due to regular oss-fuzz testing.
* Various side channels in DSA and ECDSA were addressed. These are some of
the many issues found in an extensive systematic analysis of bignum usage
by Samuel Weiser, David Schrammel et al.
* Enabled openssl(1) speed subcommand on Windows platform.
* Enabled performance optimizations when building with Visual Studio on Windows.
* Fixed incorrect carry operation in 512 addition for Streebog.
* Fixed -modulus option with openssl(1) dsa subcommand.
* Fixed PVK format output issue with openssl(1) dsa and rsa subcommand.
2.9.2 - Bug fixes
* Fixed portable builds with older versions of MacOS,
Android targets < API 21, and Solaris 10
* Fixed SRTP profile advertisement for DTLS servers.
2.9.1 - Stable release
* Added support for XChaCha20 and XChaCha20-Poly1305.
* Added support for AES key wrap constructions via the EVP interface.
* Partial port of the OpenSSL EC_KEY_METHOD API for use by OpenSSH.
* Added pbkdf2 key derivation support to openssl(1)
* Removed SHA224 based handshake signatures from consideration for use in a TLS 1.2 handshake.
* Changed the default digest type of openssl(1) enc to to sha256.
* Changed the default digest type of openssl(1) dgst to sha256.
* Changed the default digest type of openssl(1) x509 -fingerprint to sha256.
* Changed the default digest type of openssl(1) crl -fingerprint to sha256.
* Improved Windows, Android, and ARM compatibility, including assembly
optimizations on Mingw-w64 targets.
2.9.0 - Development release
* Added the SM4 block cipher from the Chinese standard GB/T 32907-2016.
* Fixed warnings about clock_gettime on Windows Visual Studio builds.
* Fixed CMake builds on systems where getpagesize is defined as an
inline function.
* CRYPTO_LOCK is now automatically initialized, with the legacy
callbacks stubbed for compatibility.
* Added the SM3 hash function from the Chinese standard GB/T 32905-2016.
* Added more OPENSSL_NO_* macros for compatibility with OpenSSL.
* Added extensive interoperability tests between LibreSSL and OpenSSL
1.0 and 1.1.
* Added additional Wycheproof tests and related bug fixes.
* Simplified sigalgs option processing and handshake signing algorithm
* Added the ability to use the RSA PSS algorithm for handshake
signatures.
* Added bn_rand_interval() and use it in code needing ranges of random
bn values.
* Added functionality to derive early, handshake, and application
secrets as per RFC8446.
* Added handshake state machine from RFC8446.
* Removed some ASN.1 related code from libcrypto that had not been used
since around 2000.
* Unexported internal symbols and internalized more record layer structs.
* Added support for assembly optimizations on 32-bit ARM ELF targets.
* Improved protection against timing side channels in ECDSA signature
generation.
* Coordinate blinding was added to some elliptic curves. This is the
last bit of the work by Brumley et al. to protect against the
Portsmash vulnerability.
* Ensure transcript handshake is always freed with TLS 1.2.
2.8.2 - Stable release
* Added Wycheproof support for ECDH and ECDSA Web Crypto test vectors,
along with test harness fixes.
* Fixed memory leak in nc(1)
2.8.1 - Test and compatibility improvements
* Added Wycheproof support for ECDH, RSASSA-PSS, AES-GCM,
AES-CMAC, AES-CCM, AES-CBC-PKCS5, DSA, ChaCha20-Poly1305, ECDSA, and
X25519 test vectors. Applied appropriate fixes for errors uncovered
by tests.
* Simplified key exchange signature generation and verification.
* Fixed a one-byte buffer overrun in callers of EVP_read_pw_string
* Converted more code paths to use CBB/CBS. All handshake messages are
now created by CBB.
* Fixed various memory leaks found by Coverity.
* Simplified session ticket parsing and handling, inspired by
BoringSSL.
* Modified signature of CRYPTO_mem_leaks_* to return -1. This function
is a no-op in LibreSSL, so this function returns an error to not
indicate the (non-)existence of memory leaks.
* SSL_copy_session_id, PEM_Sign, EVP_EncodeUpdate, BIO_set_cipher,
X509_OBJECT_up_ref_count now return an int for error handling,
matching OpenSSL.
* Converted a number of #defines into proper functions, matching
OpenSSL's ABI.
* Added X509_get0_serialNumber from OpenSSL.
* Removed EVP_PKEY2PKCS8_broken and PKCS8_set_broken, while adding
PKCS8_pkey_add1_attr_by_NID and PKCS8_pkey_get0_attrs, matching
OpenSSL.
* Removed broken pkcs8 formats from openssl(1).
* Converted more functions in public API to use const arguments.
* Stopped handing AES-GCM in ssl_cipher_get_evp, since they use the
EVP_AEAD interface.
* Stopped using composite EVP_CIPHER AEADs.
* Added timing-safe compares for checking results of signature
verification. There are no known attacks, this is just inexpensive
prudence.
* Correctly clear the current cipher state, when changing cipher state.
This fixed an issue where renegotiation of cipher suites would fail
when switched from AEAD to non-AEAD or vice-versa.
Issue reported by Bernard Spil.
* Added more cipher tests to appstest.sh, including all TLSv1.2
ciphers.
* Added RSA_meth_get_finish() RSA_meth_set1_name() from OpenSSL.
* Added new EVP_CIPHER_CTX_(get|set)_iv() API that allows the IV to be
retrieved and set with appropriate validation.
2.8.0 - Bug fixes, security, and compatibility improvements
* Extensive documentation updates and additional API history.
* Fixed a pair of 20+ year-old bugs in X509_NAME_add_entry
* Tighten up checks for various X509_VERIFY_PARAM functions,
'poisoning' parameters so that an unverified certificate cannot be
used if it fails verification.
* Fixed a potential memory leak on failure in ASN1_item_digest
* Fixed a potential memory alignment crash in asn1_item_combine_free
* Removed unused SSL3_FLAGS_DELAY_CLIENT_FINISHED and
SSL3_FLAGS_POP_BUFFER flags in write path, simplifying IO paths.
* Removed SSL_OP_TLS_ROLLBACK_BUG buggy client workarounds.
* Made ENGINE_finish and ENGINE_free succeed on NULL and simplify callers
and matching OpenSSL behavior, rewrote ENGINE_* documentation.
* Added const annotations to many existing APIs from OpenSSL, making
interoperability easier for downstream applications.
* Fixed small timing side-channels in ecdsa_sign_setup and
dsa_sign_setup.
* Documented security pitfalls with BN_FLG_CONSTTIME and constant-time
operation of BN_* functions.
* Updated BN_clear to use explicit_bzero.
* Added a missing bounds check in c2i_ASN1_BIT_STRING.
* More CBS conversions, including simplifications to RSA key exchange,
and converted code to use dedicated buffers for secrets.
* Removed three remaining single DES cipher suites.
* Fixed a potential leak/incorrect return value in DSA signature
generation.
* Added a blinding value when generating DSA and ECDSA signatures, in
order to reduce the possibility of a side-channel attack leaking the
private key.
* Added ECC constant time scalar multiplication support.
From Billy Brumley and his team at Tampere University of Technology.
* Revised the implementation of RSASSA-PKCS1-v1_5 to match the
specification in RFC 8017. Based on an OpenSSL commit by David
Benjamin.
* Cleaned up BN_* implementations following changes made in OpenSSL by
Davide Galassi and others.
2.7.4 - Security fixes
* Avoid a timing side-channel leak when generating DSA and ECDSA
signatures. This is caused by an attempt to do fast modular
arithmetic, which introduces branches that leak information
regarding secret values. Issue identified and reported by Keegan
Ryan of NCC Group.
* Reject excessively large primes in DH key generation. Problem
reported by Guido Vranken to OpenSSL
(https://github.com/openssl/openssl/pull/6457) and based on his
diff.
2.7.3 - Bug fixes
* Removed incorrect NULL checks in DH_set0_key(). Reported by Ondrej
Sury
* Fixed an issue normalizing CPU architecture in the configure script,
which disabled assembly optimizations on platforms that get detected
as 'amd64', opposed to 'x86_64'
* Limited tls_config_clear_keys() to only clear private keys.
This was inadvertently clearing the keypair, which includes the OCSP
staple and pubkey hash - if an application called tls_configure()
followed by tls_config_clear_keys(), this would prevent OCSP staples
from working.
2.7.2 - Stable release
* Updated and added extensive new HISTORY sections to API manuals.
* Added support for shared library builds with CMake on all supported
platforms. Note that some of the CMake options have changed, consult
the README for details.
2.7.1 - Bug fixes
* Fixed a bug in int_x509_param_set_hosts, calling strlen() if name
length provided is 0 to match the OpenSSL behaviour. Issue noticed
by Christian Heimes <[email protected]>.
* Fixed builds macOS 10.11 and older.
2.7.0 - Bug fixes and improvements
* Added support for many OpenSSL 1.0.2 and 1.1 APIs, based on
observations of real-world usage in applications. These are
implemented in parallel with existing OpenSSL 1.0.1 APIs - visibility
changes have not been made to existing structs, allowing code written
for older OpenSSL APIs to continue working.
* Extensive corrections, improvements, and additions to the
API documentation, including new public APIs from OpenSSL that had
no pre-existing documentation.
* Added support for automatic library initialization in libcrypto,
libssl, and libtls. Support for pthread_once or a compatible
equivalent is now required of the target operating system. As a
side-effect, minimum Windows support is Vista or higher.
* Converted more packet handling methods to CBB, which improves
resiliency when generating TLS messages.
* Completed TLS extension handling rewrite, improving consistency of
checks for malformed and duplicate extensions.
* Rewrote ASN1_TYPE_{get,set}_octetstring() using templated ASN.1.
This removes the last remaining use of the old M_ASN1_* macros
(asn1_mac.h) from API that needs to continue to exist.
* Added support for client-side session resumption in libtls.
A libtls client can specify a session file descriptor (a regular
file with appropriate ownership and permissions) and libtls will
manage reading and writing of session data across TLS handshakes.
* Improved support for strict alignment on ARMv7 architectures,
conditionally enabling assembly in those cases.
* Fixed a memory leak in libtls when reusing a tls_config.
* Merged more DTLS support into the regular TLS code path, removing
duplicated code.
* Many improvements to Windows Cmake-based builds and tests,
especially when targeting Visual Studio.
2.6.4 - Bug fixes
* Make tls_config_parse_protocols() work correctly when passed a NULL
pointer for a protocol string. Issue found by semarie@, who also
provided the diff.
* Correct TLS extensions handling when no extensions are present.
If no TLS extensions are present in a client hello or server hello,
omit the entire extensions block, rather than including it with a
length of zero. Thanks to Eric Elena <eric at voguemerry dot com> for
providing packet captures and testing the fix.
* Fixed portable builds on older Android systems, and systems with out
IPV6_TCLASS support.
2.6.3 - OpenBSD 6.2 Release
* No core changes from LibreSSL 2.6.2
* Minor compatibility fixes in portable version.
2.6.2 - Bug fixes
* Provide a useful error with libtls if there are no OCSP URLs in a
peer certificate.
* Keep track of which keypair is in use by a TLS context, fixing a bug
where a TLS server with SNI would only return the OCSP staple for the
default keypair. Issue reported by William Graeber and confirmed by
Andreas Bartelt.
* Fixed various issues in the OCSP extension parsing code.
The original code incorrectly passes the pointer allocated via
CBS_stow() (using malloc()) to a d2i_*() function and then calls
free() on the now incremented pointer, most likely resulting in a
crash. This issue was reported by Robert Swiecki who found the issue
using honggfuzz.
* If tls_config_parse_protocols() is called with a NULL pointer,
return the default protocols instead of crashing - this makes the
behaviour more useful and mirrors what we already do in
tls_config_set_ciphers() et al.
2.6.1 - Code removal, rewrites
* Added a "-T tlscompat" option to nc(1), which enables the use of all
TLS protocols and "compat" ciphers. This allows for TLS connections
to TLS servers that are using less than ideal cipher suites, without
having to resort to "-T tlsall" which enables all known cipher
suites. Diff from Kyle J. McKay.
* Added a new TLS extension handling framework, somewhat analogous to
BoringSSL, and converted all TLS extensions to use it. Added new TLS
extension regression tests.
* Improved and added many new manpages. Updated *check_private_key
manpages with additional cautions regarding their use.
* Cleaned up the EC key/curve configuration handling.
* Added tls_config_set_ecdhecurves() to libtls, which allows the names
of the eliptical curves that may be used during client and server
key exchange to be specified.
* Converted more code paths to use CBB/CBS.
* Removed support for DSS/DSA, since we removed the cipher suites a
while back.
* Removed NPN support. NPN was never standardised and the last draft
expired in October 2012. ALPN was standardised in July 2014 and has
been supported in LibreSSL since December 2014. NPN has also been
removed from Chromium in May 2016.
* Removed SSL_OP_CRYPTOPRO_TLSEXT_BUG workaround for old/broken
CryptoPro clients.
* Removed support for the TLS padding extension, which was added as a
workaround for an old bug in F5's TLS termination.
* Worked around another bug in F5's TLS termination handling of the
elliptical curves extension. RFC 4492 only defines elliptic_curves
for ClientHello. However, F5 is sending it in ServerHello. We need
to skip over it since our TLS extension parsing code is now more
strict. Thanks to Armin Wolfermann and WJ Liu for reporting.
* Added ability to clamp notafter valies in certificates for systems
with 32-bit time_t. This is necessary to conform to RFC 5280
4.1.2.5.
* Implemented the SSL_CTX_set_min_proto_version(3) API.
* Removed the original (pre-IETF) chacha20-poly1305 cipher suites.
* Reclassified ECDHE-RSA-DES-CBC3-SHA from HIGH to MEDIUM.
2.6.0 - New APIs, bug fixes and improvements
* Added support for providing CRLs to libtls. Once a CRL is provided we
enable CRL checking for the full certificate chain. Based on a diff
from Jack Burton
* Allow non-compliant clients using IP literal addresses with SNI
to connect to a server using libtls.
* Avoid a potential NULL pointer dereference in d2i_ECPrivateKey().
Reported by Robert Swiecki, who found the issue using honggfuzz.
* Added definitions for three OIDs used in EV certificates.
From Kyle J. McKay
* Added tls_peer_cert_chain_pem to libtls, useful in private
certificate validation callbacks such as those in relayd.
* Converted explicit clear/free sequences to use freezero(3).
* Reworked TLS certificate name verification code to more strictly
follow RFC 6125.
* Cleaned up and simplified server key exchange EC point handling.
* Added tls_keypair_clear_key for clearing key material.
* Removed inconsistent IPv6 handling from BIO_get_accept_socket,
simplified BIO_get_host_ip and BIO_accept.
* Fixed the openssl(1) ca command so that is generates certificates
with RFC 5280-conformant time. Problem noticed by Harald Dunkel.
* Added ASN1_TIME_set_tm to set an asn1 from a struct tm *
* Added SSL{,_CTX}_set_{min,max}_proto_version() functions.
* Added HKDF (HMAC Key Derivation Function) from BoringSSL
* Provided a tls_unload_file() function that frees the memory returned
from a tls_load_file() call, ensuring that it the contents become
inaccessible. This is specifically needed on platforms where the
library allocators may be different from the application allocator.
* Perform reference counting for tls_config. This allows
tls_config_free() to be called as soon as it has been passed to the
final tls_configure() call, simplifying lifetime tracking for the
application.
* Moved internal state of SSL and other structures to be opaque.
* Dropped cipher suites with DSS authentication.
* nc(1) improvements, including:
nc -W to terminate nc after receiving a number of packets
nc -Z for saving the peer certificate and chain in a pem file
2.5.5 - Bug fixes
* Distinguish between self-issued certificates and self-signed
certificates. The certificate verification code has special cases
for self-signed certificates and without this change, self-issued
certificates (which it seems are common place with
openvpn/easyrsa) were also being included in this category.
* Added getpagesize fallback, needed for Android bionic libc.
2.5.4 - Security Updates
* Revert a previous change that forced consistency between return
value and error code when specifing a certificate verification
callback, since this breaks the documented API. When a user supplied
callback always returns 1, and later code checks the error code to
potentially abort post verification, this will result in incorrect
successul certificate verification.
* Switched Linux getrandom() usage to non-blocking mode, continuing to
use fallback mechanims if unsuccessful. This works around a design
flaw in Linux getrandom(2) where early boot usage in a library makes
it impossible to recover if getrandom(2) is not yet initialized.
* Fixed a bug caused by the return value being set early to signal
successful DTLS cookie validation. This can mask a later failure and
result in a positive return value being returned from
ssl3_get_client_hello(), when it should return a negative value to
propagate the error.
* Fixed a build error on non-x86/x86_64 systems running Solaris.
2.5.3 - OpenBSD 6.1 Release
* Documentation updates
* Improved ocspcheck(1) error handling
2.5.2 - Security features and bugfixes
* Added the recallocarray(3) memory allocation function, and converted
various places in the library to use it, such as CBB and BUF_MEM_grow.
recallocarray(3) is similar to reallocarray. Newly allocated memory
is cleared similar to calloc(3). Memory that becomes unallocated
while shrinking or moving existing allocations is explicitly
discarded by unmapping or clearing to 0
* Added new root CAs from SECOM Trust Systems / Security Communication
of Japan.
* Added EVP interface for MD5+SHA1 hashes.
* Fixed DTLS client failures when the server sends a certificate
request.
* Correct handling of padding when upgrading an SSLv2 challenge into
an SSLv3/TLS connection.
* Allow protocols and ciphers to be set on a TLS config object in
libtls.
* Improved nc(1) TLS handshake CPU usage and server-side error
reporting.
2.5.1 - Bug and security fixes, new features, documentation updates
* X509_cmp_time() now passes a malformed GeneralizedTime field as an
error. Reported by Theofilos Petsios.
* Detect zero-length encrypted session data early, instead of when
malloc(0) fails or the HMAC check fails. Noted independently by
jsing@ and Kurt Cancemi.
* Check for and handle failure of HMAC_{Update,Final} or
EVP_DecryptUpdate().
* Massive update and normalization of manpages, conversion to
mandoc format. Many pages were rewritten for clarity and accuracy.
Portable doc links are up-to-date with a new conversion tool.
* Curve25519 Key Exchange support.
* Support for alternate chains for certificate verification.
* Code cleanups, CBS conversions, further unification of DTLS/SSL
handshake code, further ASN1 macro expansion and removal.
* Private symbol are now hidden in libssl and libcryto.
* Friendly certificate verification error messages in libtls, peer
verification is now always enabled.
* Added OCSP stapling support to libtls and netcat.
* Added ocspcheck utility to validate a certificate against its OCSP
responder and save the reply for stapling
* Enhanced regression tests and error handling for libtls.
* Added explicit constant and non-constant time BN functions,
defaulting to constant time wherever possible.
* Moved many leaked implementation details in public structs behind
opaque pointers.
* Added ticket support to libtls.
* Added support for setting the supported EC curves via
SSL{_CTX}_set1_groups{_list}() - also provide defines for the previous
SSL{_CTX}_set1_curves{_list} names. This also changes the default
list of curves to be X25519, P-256 and P-384. All other curves must
be manually enabled.
* Added -groups option to openssl(1) s_client for specifying the curves
to be used in a colon-separated list.
* Merged client/server version negotiation code paths into one,
reducing much duplicate code.
* Removed error function codes from libssl and libcrypto.
* Fixed an issue where a truncated packet could crash via an OOB read.
* Added SSL_OP_NO_CLIENT_RENEGOTIATION option that disallows
client-initiated renegotiation. This is the default for libtls
servers.
* Avoid a side-channel cache-timing attack that can leak the ECDSA
private keys when signing. This is due to BN_mod_inverse() being
used without the constant time flag being set. Reported by Cesar
Pereida Garcia and Billy Brumley (Tampere University of Technology).
The fix was developed by Cesar Pereida Garcia.
* iOS and MacOS compatibility updates from Simone Basso and Jacob
Berkman.
2.5.0 - New APIs, bug fixes and improvements
* libtls now supports ALPN and SNI
* libtls adds a new callback interface for integrating custom IO
functions. Thanks to Tobias Pape.
* libtls now handles 4 cipher suite groups:
"secure" (TLSv1.2+AEAD+PFS)
"compat" (HIGH:!aNULL)
"legacy" (HIGH:MEDIUM:!aNULL)
"insecure" (ALL:!aNULL:!eNULL)
This allows for flexibility and finer grained control, rather than
having two extremes (an issue raised by Marko Kreen some time ago).
* Tightened error handling for tls_config_set_ciphers().
* libtls now always loads CA, key and certificate files at the time the
configuration function is called. This simplifies code and results in
a single memory based code path being used to provide data to libssl.
* Add support for OCSP intermediate certificates.
* Added functions used by stunnel and exim from BoringSSL - this
brings in X509_check_host, X509_check_email, X509_check_ip, and
X509_check_ip_asc.
* Added initial support for iOS, thanks to Jacob Berkman.
* Improved behavior of arc4random on Windows when using memory leak
analysis software.
* Correctly handle an EOF that occurs prior to the TLS handshake
completing. Reported by Vasily Kolobkov, based on a diff from Marko
Kreen.
* Limit the support of the "backward compatible" ssl2 handshake to
only be used if TLS 1.0 is enabled.
* Fix incorrect results in certain cases on 64-bit systems when
BN_mod_word() can return incorrect results. BN_mod_word() now can
return an error condition. Thanks to Brian Smith.
* Added constant-time updates to address CVE-2016-0702
* Fixed undefined behavior in BN_GF2m_mod_arr()
* Removed unused Cryptographic Message Support (CMS)
* More conversions of long long idioms to time_t
* Improved compatibility by avoiding printing NULL strings with
printf.
* Reverted change that cleans up the EVP cipher context in
EVP_EncryptFinal() and EVP_DecryptFinal(). Some software relies on the
previous behaviour.
* Avoid unbounded memory growth in libssl, which can be triggered by a
TLS client repeatedly renegotiating and sending OCSP Status Request
TLS extensions.
* Avoid falling back to a weak digest for (EC)DH when using SNI with
libssl.
2.4.2 - Bug fixes and improvements
* Fixed loading default certificate locations with openssl s_client.
* Ensured OCSP only uses and compares GENERALIZEDTIME values as per
RFC6960. Also added fixes for OCSP to work with intermediate
certificates provided in responses.
* Improved behavior of arc4random on Windows to not appear to leak
memory in debug tools, reduced privileges of allocated memory.
* Fixed incorrect results from BN_mod_word() when the modulus is too
large, thanks to Brian Smith from BoringSSL.
* Correctly handle an EOF prior to completing the TLS handshake in
libtls.
* Improved libtls ceritificate loading and cipher string validation.
* Updated libtls cipher group suites into four categories:
"secure" (TLSv1.2+AEAD+PFS)
"compat" (HIGH:!aNULL)
"legacy" (HIGH:MEDIUM:!aNULL)
"insecure" (ALL:!aNULL:!eNULL)
This allows for flexibility and finer grained control, rather than
having two extremes.
* Limited support for 'backward compatible' SSLv2 handshake packets to
when TLS 1.0 is enabled, providing more restricted compatibility
with TLS 1.0 clients.
* openssl(1) and other documentation improvements.
* Removed flags for disabling constant-time operations.
This removes support for DSA_FLAG_NO_EXP_CONSTTIME,
DH_FLAG_NO_EXP_CONSTTIME, and RSA_FLAG_NO_CONSTTIME flags, making
all of these operations unconditionally constant-time.
2.4.1 - Security fix
* Correct a problem that prevents the DSA signing algorithm from
running in constant time even if the flag BN_FLG_CONSTTIME is set.
This issue was reported by Cesar Pereida (Aalto University), Billy
Brumley (Tampere University of Technology), and Yuval Yarom (The
University of Adelaide and NICTA). The fix was developed by Cesar
Pereida.
2.4.0 - Build improvements, new features
* Many improvements to the CMake build infrastructure, including
Solaris, mingw-w64, Cygwin, and HP-UX support. Thanks to Kinichiro
Inoguchi for this work.
* Added missing error handling around bn_wexpand() calls.
* Added explicit_bzero calls for freed ASN.1 objects.
* Fixed X509_*set_object functions to return 0 on allocation failure.
* Implemented the IETF ChaCha20-Poly1305 cipher suites.
* Changed default EVP_aead_chacha20_poly1305() implementation to the
IETF version, which is now the default.
* Fixed password prompts from openssl(1) to properly handle ^C.
* Reworked error handling in libtls so that configuration errors are
visible.
* Deprecated internal use of EVP_[Cipher|Encrypt|Decrypt]_Final.
* Manpage fixes and updates
2.3.5 - Reliability fix
* Fixed an error in libcrypto when parsing some ASN.1 elements > 16k.
2.3.4 - Security Update
* Fix multiple vulnerabilities in libcrypto relating to ASN.1 and encoding.
From OpenSSL.
* Minor build fixes
2.3.3 - OpenBSD 5.9 release branch tagged
* Reworked build scripts to better sync with OpenNTPD-portable
* Fixed broken manpage links
* Fixed an nginx compatibility issue by adding an 'install_sw' make alias
* Fixed HP-UX builds
* Changed the default configuration directory to c:\LibreSSL\ssl on Windows
binary builds
* cert.pem has been reorganized and synced with Mozilla's certificate store
2.3.2 - Compatibility and Reliability fixes
* Changed format of LIBRESSL_VERSION_NUMBER to match that of
OPENSSL_VERSION_NUMBER, see:
https://wiki.openssl.org/index.php/Manual:OPENSSL_VERSION_NUMBER(3)
* Added EVP_aead_chacha20_poly1305_ietf() which matches the AEAD
construction introduced in RFC 7539, which is different than that
already used in TLS with EVP_aead_chacha20_poly1305()
* Avoid a potential undefined C99+ behavior due to shift overflow in
AES_decrypt, reported by Pascal Cuoq <cuoq at trust-in-soft.com>
* More man pages converted from pod to mdoc format
* Added COMODO RSA Certification Authority and QuoVadis
root certificates to cert.pem
* Removed Remove "C=US, O=VeriSign, Inc., OU=Class 3 Public Primary Certification
Authority" (serial 3c:91:31:cb:1f:f6:d0:1b:0e:9a:b8:d0:44:bf:12:be) root
certificate from cert.pem
* Added support for building nc(1) on Solaris
* Fixed GCC 5.x+ preprocessor checks, reported by Ruslan Babayev
* Improved console handling with openssl(1) on Windows
* Ensure the network stack is enabled on Windows when running
tls_init()
* Fixed incorrect TLS certificate loading by nc(1)
* Added support for Solaris 11.3's getentropy(2) system call
* Enabled support for using NetBSD 7.0's arc4random(3) implementation
* Deprecated the SSL_OP_SINGLE_DH_USE flag by disabling its effect
* Fixes from OpenSSL 1.0.1q
- CVE-2015-3194 - NULL pointer dereference in client side certificate
validation.
- CVE-2015-3195 - Memory leak in PKCS7 - not reachable from TLS/SSL
* The following OpenSSL CVEs did not apply to LibreSSL
- CVE-2015-3193 - Carry propagating bug in the x86_64 Montgomery
squaring procedure.
- CVE-2015-3196 - Double free race condition of the identify hint
data.
See https://marc.info/?l=openbsd-announce&m=144925068504102
2.3.1 - ASN.1 and time handling cleanups
* ASN.1 cleanups and RFC5280 compliance fixes.
* Time representations switched from 'unsigned long' to 'time_t'. LibreSSL
now checks if the host OS supports 64-bit time_t.
* Fixed a leak in SSL_new in the error path.
* Support always extracting the peer cipher and version with libtls.
* Added ability to check certificate validity times with libtls,
tls_peer_cert_notbefore and tls_peer_cert_notafter.
* Changed tls_connect_servername to use the first address that resolves with
getaddrinfo().
* Remove broken conditional EVP_CHECK_DES_KEY code (non-functional since
initial commit in 2004).
* Fixed a memory leak and out-of-bounds access in OBJ_obj2txt, reported
by Qualys Security.
* Fixed an up-to 7 byte overflow in RC4 when len is not a multiple of
sizeof(RC4_CHUNK), reported by Pascal Cuoq <cuoq at trust-in-soft.com>.
* Reject too small bits value in BN_generate_prime_ex(), so that it does
not risk becoming negative in probable_prime_dh_safe(), reported by
Franck Denis.
* Enable nc(1) builds on more platforms.
2.3.0 - SSLv3 removed, libtls API changes, portability improvements
* SSLv3 is now permanently removed from the tree.
* The libtls API is changed from the 2.2.x series.
The read/write functions work correctly with external event
libraries. See the tls_init man page for examples of using libtls
correctly in asynchronous mode.
Client-side verification is now supported, with the client supplying
the certificate to the server.
Also, when using tls_connect_fds, tls_connect_socket or
tls_accept_fds, libtls no longer implicitly closes the passed in
sockets. The caller is responsible for closing them in this case.
* When loading a DSA key from an raw (without DH parameters) ASN.1
serialization, perform some consistency checks on its `p' and `q'
values, and return an error if the checks failed.
Thanks for Georgi Guninski (guninski at guninski dot com) for
mentioning the possibility of a weak (non prime) q value and
providing a test case.
See
https://cpunks.org/pipermail/cypherpunks/2015-September/009007.html
for a longer discussion.
* Fixed a bug in ECDH_compute_key that can lead to silent truncation
of the result key without error. A coding error could cause software
to use much shorter keys than intended.
* Removed support for DTLS_BAD_VER. Pre-DTLSv1 implementations are no
longer supported.
* The engine command and parameters are removed from the openssl(1).
Previous releases removed dynamic and builtin engine support
already.
* SHA-0 is removed, which was withdrawn shortly after publication 20
years ago.
* Added Certplus CA root certificate to the default cert.pem file.
* New interface OPENSSL_cpu_caps is provided that does not allow
software to inadvertently modify cpu capability flags.
OPENSSL_ia32cap and OPENSSL_ia32cap_loc are removed.
* The out_len argument of AEAD changed from ssize_t to size_t.
* Deduplicated DTLS code, sharing bugfixes and improvements with
TLS.
* Converted 'nc' to use libtls for client and server operations; it is
included in the libressl-portable distribution as an example of how
to use the library.
2.2.3 - Bug fixes, build enhancements
* LibreSSL 2.2.2 incorrectly handles ClientHello messages that do not
include TLS extensions, resulting in such handshakes being aborted.
This release corrects the handling of such messages. Thanks to
Ligushka from github for reporting the issue.
* Added install target for cmake builds. Thanks to TheNietsnie from
github.
* Updated pkgconfig files to correctly report the release version
number, not the individual library ABI version numbers. Thanks to
Jan Engelhardt for reporting the issue.
2.2.2 - More TLS parser rework, bug fixes, expanded portable build support
* Switched 'openssl dhparam' default from 512 to 2048 bits
* Reworked openssl(1) option handling
* More CRYPTO ByteString (CBC) packet parsing conversions
* Fixed 'openssl pkeyutl -verify' to exit with a 0 on success