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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:
3.4.2 - Security fix
* In some situations the X.509 verifier would discard an error on an
unverified certificate chain, resulting in an authentication bypass.
Thanks to Ilya Shipitsin and Timo Steinlein for reporting.
3.4.1 - Stable release
* New Features
- Added support for OpenSSL 1.1.1 TLSv1.3 APIs.
- Enabled the new X.509 validator to allow verification of
modern certificate chains.
* Portable Improvements
- Ported continuous integration and test infrastructure to Github
actions.
- Added Universal Windows Platform (UWP) build support.
- Fixed mingw-w64 builds on newer versions with missing SSP support.
- Added non-executable stack annotations for CMake builds.
* API and Documentation Enhancements
- Added the following APIs from OpenSSL
BN_bn2binpad BN_bn2lebinpad BN_lebin2bn EC_GROUP_get_curve
EC_GROUP_order_bits EC_GROUP_set_curve
EC_POINT_get_affine_coordinates
EC_POINT_set_affine_coordinates
EC_POINT_set_compressed_coordinates EVP_DigestSign
EVP_DigestVerify SSL_CIPHER_find SSL_CTX_get0_privatekey
SSL_CTX_get_max_early_data SSL_CTX_get_ssl_method
SSL_CTX_set_ciphersuites SSL_CTX_set_max_early_data
SSL_CTX_set_post_handshake_auth SSL_SESSION_get0_cipher
SSL_SESSION_get_max_early_data SSL_SESSION_is_resumable
SSL_SESSION_set_max_early_data SSL_get_early_data_status
SSL_get_max_early_data SSL_read_early_data SSL_set0_rbio
SSL_set_ciphersuites SSL_set_max_early_data
SSL_set_post_handshake_auth
SSL_set_psk_use_session_callback
SSL_verify_client_post_handshake SSL_write_early_data
- Added AES-GCM constants from RFC 7714 for SRTP.
* Compatibility Changes
- Implement flushing for TLSv1.3 handshakes behavior, needed for Apache.
- Call the info callback on connect/accept exit in TLSv1.3,
needed for p5-Net-SSLeay.
- Default to using named curve parameter encoding from
pre-OpenSSL 1.1.0, adding OPENSSL_EC_EXPLICIT_CURVE.
- Do not ignore SSL_TLSEXT_ERR_FATAL from the ALPN callback.
* Testing and Proactive Security
- Added additional state machine test coverage.
- Improved integration test support with ruby/openssl tests.
- Error codes and callback support in new X.509 validator made
compatible with p5-Net_SSLeay tests.
* Internal Improvements
- Numerous fixes and improvements to the new X.509 validator to
ensure compatible error codes and callback support compatible
with the legacy OpenSSL validator.
3.4.0 - Development release
* Add support for OpenSSL 1.1.1 TLSv1.3 APIs.
* Enable new x509 validator.
* More details to come, testing is appreciated.
3.3.5 - Security fix
* A stack overread could occur when checking X.509 name constraints.
From GoldBinocle on GitHub.
* Enable X509_V_FLAG_TRUSTED_FIRST by default in the legacy verifier.
This compensates for the expiry of the DST Root X3 certificate.
3.3.4 - Security fix
* In LibreSSL, printing a certificate can result in a crash in
X509_CERT_AUX_print().
From Ingo Schwarze
* Ensure GNU-stack is set on ELF platforms when building with CMake to
enable non-executable stack annotations for the GNU toolchain.
From Tobias Heider
3.3.3 - Stable release
* This is the first stable release from the 3.3.x series.
There are no changes from 3.3.2.
3.3.2 - Development release
* This release adds support for DTLSv1.2 and continues the rewrite
of the record layer for the legacy stack. Numerous bugs and
interoperability issues were fixed in the new verifier. A few bugs
and incompatibilities remain, so this release uses the old verifier
by default. The OpenSSL 1.1 TLSv1.3 API is not yet available.
* Switch finish{,_peer}_md_len from an int to a size_t.
* Make SSL_get{,_peer}_finished() work when used with TLSv1.3.
* Use EVP_MD_MAX_MD_SIZE instead of 2 * EVP_MD_MAX_MD_SIZE as size
for cert_verify_md[], finish_md[] and peer_finish_md[]. The factor 2
was a historical artefact.
* Correct the return value type from ERR_peek_error() to a long.
* Avoid use of uninitialized in ASN1_time_parse() which could happen
on parsing UTCTime if the caller did not initialise the passed
struct tm.
* Destroy the mutex in a tls_config object on tls_config_free().
* Free alert_data and phh_data in tls13_record_layer_free()
these could leak if SSL_shutdown() or tls_close() were called
after closing the underlying socket().
* Free struct members in tls13_record_layer_free() in their natural
order for reviewability.
* Gracefully handle root certificates being both trusted and
untrusted.
* Handle X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE in the new
verifier.
* Use the legacy verifier when building auto chains for TLS.
* Use consistent names in tls13_{client,server}_finished_{recv,send}().
* Add tls13_secret_{init,cleanup}() and use them throughout the
TLSv1.3 code base.
* Move the read MAC key into the TLSv1.2 record layer.
* Make tls12_record_layer_free() NULL safe.
* Search the intermediates only after searching the root certs in the
new verifier to avoid problems with the legacy callback.
* Bail out early after finding a single chain in the new verifier, if
we have been called via the legacy verifier API.
* Set (invalid and likely incomplete) chain on the xsc on chain build
failure prior to calling the callback. This is required by various
callers, including auto chain.
* Align SSL_get_shared_ciphers() with OpenSSL. This takes into account
that it never returned server ciphers, so now it will fail when
called from the client side.
* Add support for SSL_get_shared_ciphers() with TLSv1.3.
* Split the record protection from the TLSv1.2 record layer.
* Clean up sequence number handling in the new TLSv1.2 record layer.
* Clean up sequence number handling in DTLS.
* Clean up dtls1_reset_seq_numbers().
* Factor out code for explicit IV length, block size and MAC length
from tls12_record_layer_open_record_protected_cipher().
* Provide record layer overhead for DTLS.
* Provide functions to determine if TLSv1.2 record protection is
engaged.
* Add code to handle change of cipher state in the new TLSv1.2 record
layer.
* Mop up now unused dtls1_build_sequence_numbers() function.
* Allow setting a keypair on a tls context without specifying the
private key, and fake it internally in libtls. This removes the
need for privsep engines like relayd to use bogus keys.
* Skip the private key check for fake private keys.
* Move the private key setup from tls_configure_ssl_keypair() to a
helper function with proper error checking.
* Change the internal tls_configure_ssl_keypair() function to
return -1 instead of 1 on failure.
* Move sequence numbers into the new TLSv1.2 record layer.
* Move AEAD handling into the new TLSv1.2 record layer.
* Remove direct assignment of aead_ctx to avoid a leak.
* Add a number of RPKI OIDs from RFC 6482, 6484, 6493, 8182, 8360,
draft-ietf-sidrops-rpki-rta, and draft-ietf-opsawg-finding-geofeeds.
* Fail early in legacy exporter if the master secret is not available
to avoid a segfault if it is called when the handshake is not
completed.
* Factor out legacy stack version checks.
* Correct handshake MAC/PRF for various TLSv1.2 cipher suites which
were originally added with the default handshake MAC and PRF rather
than the SHA256 handshake MAC and PRF.
* Absorb ssl3_get_algorithm2() into ssl_get_handshake_evp_md().
* Use dtls1_record_retrieve_buffered_record() to load buffered
application data.
* Enforce read ahead with DTLS.
* Remove bogus DTLS checks that disabled ECC and OCSP.
* Sync cert.pem with Mozilla NSS root CAs except "GeoTrust Global CA".
* Only print the certificate file once on verification failure.
* Pull in fix for EVP_CipherUpdate() overflow from OpenSSL.
* Clean up and simplify dtls1_get_cipher().
* Group HelloVerifyRequest decoding and add missing check for trailing
data.
* Revise HelloVerifyRequest handling for DTLSv1.2.
* Handle DTLS1_2_VERSION in various places.
* Add DTLSv1.2 methods.
* Make SSL{_CTX,}_get_{min,max}_proto_version() return a version of
zero if the minimum or maximum has been set to zero to match
OpenSSL's behavior.
* Rename the "truncated" label into "decode_err" and the "f_err"
label into "fatal_err".
* Factor out and change some of the legacy client version code.
* Simplify version checks in the TLSv1.3 client. Ensure that the
server announced TLSv1.3 and nothing higher and check that the
legacy_version is set to TLSv1.2 as required by RFC 8446.
* Fix an off-by-one in x509_verify_set_xsc_chain() to make sure that
the new validator checks for EXFLAG_CRITICAL in
x509_vfy_check_chain_extension() for all untrusted certs in the
chain. Take into account that the root is not necessarily trusted.
* Avoid passing last and depth to x509_verify_cert_error() on ENOMEM.
* Rename depth to num_untrusted.
* Only use TLS versions internally rather than both TLS and DTLS
versions since the latter are the one's complement of the human
readable version numbers, which means that newer versions decrease
in value.
* Fix two bugs in the legacy verifier that resulted from refactoring
of X509_verify_cert() for the new verifier: a return value was
incorrectly treated as boolean, making it insufficient to decide
whether validation should carry on or not.
* Identify DTLS based on the version major value.
* Move handling of cipher/hash based cipher suites into the new record
layer.
* Add tls12_record_protection_unused() and call it from CCS functions.
* Move key/IV length checks closer to usage sites. Also add explicit
checks against EVP_CIPHER_{iv,key}_length().
* Replace two handrolled tls12_record_protection_engaged().
* Improve internal version handling: add handshake fields for our
minimum version, our maximum version and the TLS version negotiated
during the handshake. Convert most of the internal code to use these
version fields.
* Guard against future internal use of TLS1_get_{client,}_version()
macros.
* Remove the internal ssl_downgrade_max_version() function which is no
longer needed.
* Fix checks for memory caps of constraints names. There are internal
caps on the number of name constraints and other names, that the new
name constraints code allocates per cert chain. These limits were
checked too late, making them only partially effective.
* Use EXFLAG_INVALID to handle out of memory and parse errors in
x509v3_cache_extensions().
* Add support for DTLSv1.2 version handling.
* Enable DTLSv1.2 support.
* Add DTLSv1.2 support to openssl s_client/s_server.
* Remove no longer needed read ahead workarounds in the s_client and
s_server.
* Fix a copy-paste error - skid was confused with an akid when
checking for EXFLAG_INVALID. This broke OCSP validation with
certain mirrors.
* Make supported protocols and options for DHE params more prominent
in tls_config_set_protocols.3.
* Avoid a use-after-scope in tls13_cert_add().
* Split TLSv1.3 record protection from record layer.
* Move the TLSv1.3 handshake struct inside the shared handshake
struct.
* Fully initialize rrec in tls12_record_layer_open_record_protected()
to avoid confusing some static analyzers.
* Use tls_set_errorx() on OCSP_basic_verify() failure since the latter
does not set errno.
* Convert openssl(1) x509 to new option handling and do the usual
clean up that goes along with it.
* Add SSL_HANDSHAKE_TLS12 for TLSv1.2 specific handshake data.
* Rename new_cipher to cipher to align naming with keyblock or other
parts of the handshake data.
* Avoid mangled output in BIO_debug_callback().
* Fix client initiated renegotiation by replacing use of s->internal-type
with s->server.
* Move the TLSv1.2 record number increment into the new record layer.
* Move finished and peer finished into the handshake struct.
* Avoid transcript initialization when sending a TLS HelloRequest,
fixing server initiated renegotiation.
* Remove pointless assignment in SSL_get0_alpn_selected().
* Provide EVP_PKEY_new_CMAC_KEY(3).
* Add missing prototype for d2i_DSAPrivateKey_fp(3) to x509.h.
* Add DTLSv1.2 to openssl(1) s_server and s_client protocol message
logging.
* Avoid leaking param->name in x509_verify_param_zero().
* Avoid a leak in an error path in openssl(1) x509.
* Add some error checking to openssl(1) x509.
* When sending an alert in TLSv1.3, only set its error code when no
other error was set previously. Certain clients rely on specific
SSL_R_ error codes to identify that they are dealing with a self
signed cert.
* Switch to the legacy verifier for the stable release.
* Provide SSL_use_certificate_chain_file(3).
* Provide SSL_set_hostflags(3) and SSL_get0_peername(3).
* Provide various DTLSv1.2 specific functions and defines.
* Document meaning of '*' in the genrsa output.
* Updated documentation for SSL_get_shared_ciphers(3).
* Add documentation for SSL_get_finished(3).
* Document EVP_PKEY_new_CMAC_key(3)
* Document SSL_use_certificate_chain_file(3).
* Document SSL_set_hostflags(3) and SSL_get0_peername(3).
* Update SSL_get_version.3 manual for DTLSv.1.2 support.
* Added '--enable-libtls-only' build option, which builds and installs a
statically-linked libtls, skipping libcrypto and libssl. This is useful
for systems that ship with OpenSSL but wish to also package libtls.
3.3.1 - Security fix
* Malformed ASN.1 in a certificate revocation list or a timestamp
response token can lead to a NULL pointer dereference.
Bug fixes
* Move point-on-curve check to set_affine_coordinates to avoid
verifying ECDSA signatures with unchecked public keys.
* Fix SSL_is_server() to behave as documented by re-introducing the
client-specific methods.
* Avoid undefined behavior due to memcpy(NULL, NULL, 0).
* Mark a few more internal static tables const.
3.3.0 - Development release
* Make openssl(1) s_server ignore -4 and -6 for compatibility with
OpenSSL.
* Further cleanup of the DTLS record handling.
* Continue the replacement of the TLSv1.2 record layer by
reimplementing the read side of the TLSv1.2 record handling.
* Replace DTLSv1_enc_data() with TLSv1_1_enc_data().
* Merge d1_{clnt,srvr}.c into ssl_{clnt,srvr}.c.
* When switching from the TLSv1.3 stack to the legacy stack include
a TLS record header. This is necessary if there is more than one
handshake message in the TLS plaintext record.
* Set SO_REUSEADDR on the server socket in the openssl(1) ocsp
command.
* Fix resource handling on error in OCSP_request_add0_id().
* Add const to ssl_ciphers and tls1[23]_sigalgs* to push them into
.data.rel.ro and .rodata, respectively.
* Add a const qualifier to srtp_known_profiles.
* Simplify TLS method by removing the client and server specific
methods internally.
* Avoid casting away const in ssl_ctx_make_profiles().
* Make sure there is enough room for stashing the handshake message
when switching to the legacy TLS stack.
* Avoid explicitly conditioning an assert on DTLS1_VERSION to make
the assert work for newer DTLS versions.
* Merge SSL_ENC_METHOD into SSL_METHOD_INTERNAL.
* Send a host header with OCSP queries to make openssl(1) ocsp
work with some widely used OCSP responders.
* Fix a memory leak in the openssl(1) s_client.
* Add a flag to mark DTLS methods as DTLS to have an easy way to
recognize DTLS methods that avoids inspecting the version number.
* Implement SSL_is_dtls() and use it internally in place of the
SSL_IS_DTLS macro.
* Unbreak DTLS retransmissions for flights that include a CCS.
* Add ability to ocspcheck(8) to parse a port in the specified
OCSP URL.
* Refactor and clean up ocspcheck(8) and add regression tests.
* If x509_verify() fails, ensure that the error is set on both
the x509_verify_ctx() and its store context to make some failures
visible from SSL_get_verify_result().
* Use the X509_STORE_CTX get_issuer() callback from the new X.509
verifier to fix hashed certificate directories.
* Only check BIO_should_read() on read and BIO_should_write() on
write. Previously, BIO_should_write() was also checked after read
and BIO_should_read() after write which could cause stalls in
software that uses the same BIO for read and write.
* In openssl(1) verify, also check for error on the store context
since the return value of X509_verify_cert() is unreliable in
presence of a callback that returns 1 too often.
* Update getentropy on Windows to use Cryptography Next Generation
(CNG). wincrypt is deprecated and no longer works with newer Windows
environments, such as in Windows Store apps.
* Implement auto chain for the TLSv1.3 server since some software
relies on this.
* Handle additional certificate error cases in the new X.509 verifier.
Keep track of the errors encountered if a verify callback tells the
verifier to continue and report them back via the error on the store
context. This mimics the behavior of the old verifier that would
persist the first error encountered while building the chain.
* Report specific failures for "self signed certificates" in a way
compatible with the old verifier since software relies on the
error code.
* Implement key exporter for TLSv1.3.
* Plug a large memory leak in the new verifier caused by calling
X509_policy_check() repeatedly.
* Avoid leaking memory in x509_verify_chain_dup().
* Various documentation improvements, particularly around TLS methods.
3.2.3 - Security fix
* Malformed ASN.1 in a certificate revocation list or a timestamp
response token can lead to a NULL pointer dereference.
3.2.2 - Stable release
* This is the first stable release with the new TLSv1.3
implementation enabled by default for both client and server. The
OpenSSL 1.1 TLSv1.3 API is not yet available and will be provided
in an upcoming release.
* New X509 certificate chain validator that correctly handles
multiple paths through intermediate certificates. Loosely based on
Go's X509 validator.
* New name constraints verification implementation which passes the
bettertls.com certificate validation check suite.
* Improve the handling of BIO_read()/BIO_write() failures in the
TLSv1.3 stack.
* Start replacing the existing TLSv1.2 record layer.
* Define OPENSSL_NO_SSL_TRACE in opensslfeatures.h.
* Make SSL_CTX_get_ciphers(NULL) return NULL rather than crash.
* Send alert on ssl_get_prev_session() failure.
* Zero out variable on the stack to avoid leaving garbage in the tail
of short session IDs.
* Move state initialization from SSL_clear() to ssl3_clear() to ensure
that it gets correctly reinitialized across a SSL_set_ssl_method()
call.
* Avoid an out-of-bounds write in BN_rand().
* Fix numerous leaks in the UI_dup_* functions. Simplify and tidy up
the code in ui_lib.c.
* Correctly track selected ALPN length to avoid a potential segmentation
fault with SSL_get0_alpn_selected() when alpn_selected is NULL.
* Include machine/endian.h gost2814789.c in order to pick up the
__STRICT_ALIGNMENT define.
* Simplify SSL method lookups.
* Clean up and simplify SSL_get_ciphers(), SSL_set_session(),
SSL_set_ssl_method() and several internal functions.
* Correctly handle ssl_cert_dup() failure in SSL_set_SSL_CTX().
* Refactor dtls1_new(), dtls1_hm_fragment_new(),
dtls1_drain_fragments(), dtls1_clear_queues().
* Copy the session ID directly in ssl_get_prev_session() instead of
handing it through several functions for copying.
* Clean up and refactor ssl_get_prev_session(); simplify
tls_decrypt_ticket() and tls1_process_ticket() exit paths.
* Avoid memset() before memcpy() in CBS_add_bytes().
* Rewrite X509_INFO_{new,free}() more idiomatically.
* Remove unnecessary zeroing after recallocarray() in
ASN1_BIT_STRING_set_bit().
* Convert openssl(1) ocsp new option handling.
* Document SSL_set1_host(3), SSL_set_SSL_CTX(3).
* Document return value from EC_KEY_get0_public_key(3).
* Greatly expanded test coverage via the tlsfuzzer test scripts.
* Expanded test coverage via the bettertls certificate test suite.
* Test interoperability with the Botan TLS client.
* Make pthread_mutex static initialisation work on Windows.
* Get __STRICT_ALIGNMENT from machine/endian.h with portable build.
3.2.1 - Development release
* Propagate alerts from the read half of the TLSv1.3 record layer to I/O
functions.
* Send a record overflow alert for TLSv1.3 messages having overlong
plaintext or inner plaintext.
* Send an illegal parameter alert if a client sends an invalid DH key
share.
* Document PKCS7_final(3), PKCS7_add_attribute(3).
* Collapse x509v3 directory into x509.
* Improve TLSv1.3 client certificate selection to allow EC certificates
instead of only RSA certificates.
* Fail on receiving an invalid NID in X509_ATTRIBUTE_create() instead
of constructing a broken objects that may cause NULL pointer accesses.
* Add support for additional GOST curves from RFC 7836 and
draft-deremin-rfc4491-bis.
* Add OIDs for HMAC using the Streebog hash function.
* Allow GOST R 34.11-2012 in PBE/PBKDF2/PKCS#5.
* Enable GOST_SIG_FORMAT_RS_LE when verifying certificate signatures.
* Handle GOST in ssl_cert_dup().
* Stop sending GOST R 34.10-94 as a CertificateType.
* Use IANA allocated GOST ClientCertificateTypes.
* Add a custom copy handler for AES keywrap to fix a use-after-free.
* Enforce in the TLSv1.3 server that that ClientHello messages after
a HelloRetryRequest match the original ClientHello as per RFC 8446
section 4.1.2
* Document more PKCS7 attribute functions.
* Document PKCS7_get_signer_info(3).
* Document PEM_ASN1_read(3) and PEM_ASN1_read_bio(3).
* Document PEM_def_callback(3).
* Document EVP_read_pw_string_min(3).
* Merge documentation of X509_get0_serialNumber from OpenSSL 1.1.1.
* Document error handling of X509_PUBKEY_get0(3) and X509_PUBKEY_get(3)
* Document X509_get0_pubkey_bitstr(3).
* Fix an off-by-one in the CBC padding removal. From BoringSSL.
* Enforce restrictions on extensions present in the ClientHello as per
RFC 8446, section 9.2.
* Add new CMAC_Init(3) and ChaCha(3) manual pages.
* Fix SSL_shutdown behavior to match the legacy stack. The previous
behavior could cause a hang.
* Add initial support for openbsd/powerpc64.
* Make the message type available in the internal TLS extensions API
functions.
* Enable TLSv1.3 for the generic TLS_method().
* Convert openssl(1) s_client option handling.
* Document openssl(1) certhash.
* Convert openssl(1) verify option handling.
* Fix a longstanding bug in PEM_X509_INFO_read_bio(3) that could cause
use-after-free and double-free issues in calling programs.
* Document PEM_X509_INFO_read(3) and PEM_X509_INFO_read_bio(3).
* Handle SSL_MODE_AUTO_RETRY being changed during a TLSv1.3 session.
* Convert openssl(1) s_server option handling.
* Add minimal info callback support for TLSv1.3.
* Refactor, clean up and simplify some SSL3/DTLS1 record writing code.
* Correctly handle server requests for an OCSP response.
* Add the P-521 curve to the list of curves supported by default
in the client.
* Convert openssl(1) req option handling.
* Avoid calling freezero with a negative size if a server sends a
malformed plaintext of all zeroes.
* Send an unexpected message alert if no valid content type is found
in a TLSv1.3 record.
3.2.0 - Development release
* Enable TLS 1.3 server side in addition to client by default.
With this change TLS 1.3 is handled entirely on the new stack
and state machine, with fallback to the legacy stack and
state machine for older versions. Note that the OpenSSL TLS 1.3
API is not yet visible/available.
* Improve length checks in the TLS 1.3 record layer and provide
appropriate alerts for violations of record layer limits.
* Enforce that SNI hostnames received by the TLS server are correctly
formed as per RFC 5890 and RFC 6066, responding with illegal parameter
for a nonconformant host name.
* Support SSL_MODE_AUTO_RETRY in TLS 1.3 to allow the automatic
retry of handshake messages.
* Modify I/O behavior so that SSL_MODE_AUTO_RETRY is the default
similar to new OpenSSL releases.
* Modify openssl(1) to clear SSL_MODE_AUTO_RETRY appropriately in
various commands.
* Add tlsfuzzer based regression tests.
* Support sending certificate status requests from the TLS 1.3
client to request OCSP staples for leaf certificates.
* Support sending certificate status replies from the TLS 1.3 server
in order to send OCSP staples for leaf certificates.
* Send correct alerts when handling failed key share extensions
on the TLS 1.3 server.
* Various compatibility fixes for TLS 1.3 to 1.2 fallback for
switching from the new to legacy stacks.
* Support TLS 1.3 options in the openssl(1) command.
* Many alert cleanups in TLS 1.3 to provide expected alerts in failure
conditions.
* Modify "openssl x509" to display invalid certificate times as
invalid, and correctly deal with the failing return case from
X509_cmp_time so that a certificate with an invalid NotAfter does
not appear valid.
* Support sending dummy change_cipher_spec records for TLS 1.3 middlebox
compatibility.
* Ensure only PSS signatures are used with RSA in TLS 1.3.
* Ensure that TLS 1.3 clients advertise exactly the "null" compression
method in its legacy_compression_methods.
* Correct use of sockaddr_storage instead of sockaddr in openssl(1)
s_client, which could lead to using 14 bytes of stack garbage instead
of an IPv6 address in DTLS mode.
* Use non-expired certificates first when building a certificate chain.
3.1.5 - Security fix
* Malformed ASN.1 in a certificate revocation list or a timestamp
response token can lead to a NULL pointer dereference.
3.1.4 - Interoperability and bug fixes for the TLSv1.3 client:
* Improve client certificate selection to allow EC certificates
instead of only RSA certificates.
* Do not error out if a TLSv1.3 server requests an OCSP response as
part of a certificate request.
* Fix SSL_shutdown behavior to match the legacy stack. The previous
behaviour could cause a hang.
* Fix a memory leak and add a missing error check in the handling of
the key update message.
* Fix a memory leak in tls13_record_layer_set_traffic_key.
* Avoid calling freezero with a negative size if a server sends a
malformed plaintext of all zeroes.
* Ensure that only PSS may be used with RSA in TLSv1.3 in order
to avoid using PKCS1-based signatures.
* Add the P-521 curve to the list of curves supported by default
in the client.
3.1.3 - Bug fix
* libcrypto may fail to build a valid certificate chain due to
expired untrusted issuer certificates.
3.1.2 - Bug fix
* A TLS client with peer verification disabled may crash when
contacting a server that sends an empty certificate list.
3.1.1 - Stable release
* Improved cipher suite handling to automatically include TLSv1.3
cipher suites when they are not explicitly referred to in the
cipher string.
* Improved handling of TLSv1.3 HelloRetryRequests, simplifying
state transitions and ensuring that the legacy session identifer
retains the same value across the handshake.
* Provided TLSv1.3 cipher suite aliases to match the names used
in RFC 8446.
* Improved TLSv1.3 client key share handling to allow the use of
any groups in our configured NID list.
* Fixed printing the serialNumber with X509_print_ex() fall back to
the colon separated hex bytes in case greater than int value.
* Fix to disallow setting the AES-GCM IV length to zero.
* Added -groups option to openssl(1) s_server subcommand.
* Fix to show TLSv1.3 extension types with openssl(1) -tlsextdebug.
* Improved portable builds to support the use of static MSVC runtimes.
* Fixed portable builds to avoid exporting a sleep() symbol.
3.1.0 - Development release
* Completed initial TLS 1.3 implementation with a completely new state
machine and record layer. TLS 1.3 is now enabled by default for the
client side, with the server side to be enabled in a future release.
Note that the OpenSSL TLS 1.3 API is not yet visible/available.
* Many more code cleanups, fixes, and improvements to memory handling
and protocol parsing.
* Added RSA-PSS and RSA-OAEP methods from OpenSSL 1.1.1.
* Ported Cryptographic Message Syntax (CMS) implementation from OpenSSL
1.1.1 and enabled by default.
* Improved compatibility by backporting functionality and documentation
from OpenSSL 1.1.1.
* Added many new additional crypto test vectors.
* Adjusted EVP_chacha20()'s behavior to match OpenSSL's semantics.
* Default CA bundle location is now configurable in portable builds.
* Added cms subcommand to openssl(1).
* Added -addext option to openssl(1) req subcommand.
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.