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NEWS
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GnuTLS NEWS -- History of user-visible changes. -*- outline -*-
Bug numbers referenced in this log correspond to bug numbers at our issue tracker,
available at https://gitlab.com/gnutls/gnutls/issues
Copyright (C) 2000-2016 Free Software Foundation, Inc.
Copyright (C) 2013-2019 Nikos Mavrogiannopoulos
See the end for copying conditions.
* Version 3.8.1 (unreleased)
** libgnutls: ClientHello extensions are randomized by default
To make fingerprinting harder, TLS extensions in ClientHello
messages are shuffled. As this behavior may cause compatibility
issue with legacy applications that do not accept the last
extension without payload, the behavior can be reverted with the
%NO_SHUFFLE_EXTENSIONS priority keyword.
** libgnutls: Add support for RFC 9258 external PSK importer.
This enables to deploy the same PSK across multiple TLS versions
(TLS 1.2 and TLS 1.3) in a secure manner. To use, the application
needs to set up a callback that formats the PSK identity using
gnutls_psk_format_imported_identity().
** New option --attime to specify current time.
To make testing with different timestamp to the system easier, the
tools doing certificate verification now provide a new option
--attime, which takes an arbitrary time.
** API and ABI modifications:
gnutls_psk_client_credentials_function3: New typedef
gnutls_psk_server_credentials_function3: New typedef
gnutls_psk_set_server_credentials_function3: New function
gnutls_psk_set_client_credentials_function3: New function
gnutls_psk_format_imported_identity: New function
GNUTLS_PSK_KEY_EXT: New enum member of gnutls_psk_key_flags
* Version 3.8.0 (released 2023-02-09)
** libgnutls: Fix a Bleichenbacher oracle in the TLS RSA key exchange.
Reported by Hubert Kario (#1050). Fix developed by Alexander Sosedkin.
[GNUTLS-SA-2020-07-14, CVSS: medium] [CVE-2023-0361]
** libgnutls: C++ library is now header only. All definitions from
gnutlsxx.c have been moved into gnutlsxx.h. Users of the C++
interface have two options:
1. include gnutlsxx.h in their application and link against
the C library. (default)
2. include gnutlsxx.h in their application, compile with
GNUTLS_GNUTLSXX_NO_HEADERONLY macro defined and link
against the C++ library.
** libgnutls: GNUTLS_NO_STATUS_REQUEST flag and %NO_STATUS_REQUEST
priority modifier have been added to allow disabling of the
status_request TLS extension in the client side.
** libgnutls: TLS heartbeat is disabled by default.
The heartbeat extension in TLS (RFC 6520) is not widely used given
other implementations dropped support for it. To enable back
support for it, supply --enable-heartbeat-support to configure
script.
** libgnutls: SRP authentication is now disabled by default.
It is disabled because the SRP authentication in TLS is not up to
date with the latest TLS standards and its ciphersuites are based
on the CBC mode and SHA-1. To enable it back, supply
--enable-srp-authentication option to configure script.
** libgnutls: All code has been indented using "indent -ppi1 -linux".
CI/CD has been adjusted to catch regressions. This is implemented
through devel/indent-gnutls, devel/indent-maybe and .gitlab-ci.yml’s
commit-check. You may run devel/indent-gnutls to fix any
indentation issues if you make code modifications.
** guile: Guile-bindings removed.
They have been extracted into a separate project to reduce complexity
and to simplify maintenance, see <https://gitlab.com/gnutls/guile/>.
** minitasn1: Upgraded to libtasn1 version 4.19.
** API and ABI modifications:
GNUTLS_NO_STATUS_REQUEST: New flag
GNUTLS_SRTP_AEAD_AES_128_GCM: New gnutls_srtp_profile_t enum member
GNUTLS_SRTP_AEAD_AES_256_GCM: New gnutls_srtp_profile_t enum member
* Version 3.7.8 (released 2022-09-27)
** libgnutls: In FIPS140 mode, RSA signature verification is an approved
operation if the key has modulus with known sizes (1024, 1280,
1536, and 1792 bits), in addition to any modulus sizes larger than
2048 bits, according to SP800-131A rev2.
** libgnutls: gnutls_session_channel_binding performs additional checks when
GNUTLS_CB_TLS_EXPORTER is requested. According to RFC9622 4.2, the
"tls-exporter" channel binding is only usable when the handshake is
bound to a unique master secret (i.e., either TLS 1.3 or extended
master secret extension is negotiated). Otherwise the function now
returns error.
** libgnutls: usage of the following functions, which are designed to
loosen restrictions imposed by allowlisting mode of configuration,
has been additionally restricted. Invoking them is now only allowed
if system-wide TLS priority string has not been initialized yet:
gnutls_digest_set_secure
gnutls_sign_set_secure
gnutls_sign_set_secure_for_certs
gnutls_protocol_set_enabled
** API and ABI modifications:
No changes since last version.
* Version 3.7.7 (released 2022-07-28)
** libgnutls: Fixed double free during verification of pkcs7 signatures.
Reported by Jaak Ristioja (#1383). [GNUTLS-SA-2022-07-07, CVSS: medium]
[CVE-2022-2509]
** libgnutls: gnutls_hkdf_expand now only accepts LENGTH argument less than or
equal to 255 times hash digest size, to comply with RFC 5869 2.3.
** libgnutls: Length limit for TLS PSK usernames has been increased
from 128 to 65535 characters (#1323).
** libgnutls: AES-GCM encryption function now limits plaintext
length to 2^39-256 bits, according to SP800-38D 5.2.1.1.
** libgnutls: New block cipher functions have been added to transparently
handle padding. gnutls_cipher_encrypt3 and gnutls_cipher_decrypt3 can be
used in combination of GNUTLS_CIPHER_PADDING_PKCS7 flag to automatically
add/remove padding if the length of the original plaintext is not a multiple
of the block size.
** libgnutls: New function for manual FIPS self-testing.
** API and ABI modifications:
gnutls_fips140_run_self_tests: New function
gnutls_cipher_encrypt3: New function
gnutls_cipher_decrypt3: New function
gnutls_cipher_padding_flags_t: New enum
** guile: Guile 1.8 is no longer supported
** guile: Session record port treats premature termination as EOF
Previously, a ‘gnutls-error’ exception with the
‘error/premature-termination’ value would be thrown while reading from a
session record port when the underlying session was terminated
prematurely. This was inconvenient since users of the port may not be
prepared to handle such an exception.
Reading from the session record port now returns the end-of-file object
instead of throwing an exception, just like it would for a proper
session termination.
** guile: Session record ports can have a ‘close’ procedure.
The ‘session-record-port’ procedure now takes an optional second
parameter, and a new ‘set-session-record-port-close!’ procedure is
provided to specify a ‘close’ procedure for a session record port.
This ‘close’ procedure lets users specify cleanup operations for when
the port is closed, such as closing the file descriptor or port that
backs the underlying session.
* Version 3.7.6 (released 2022-05-27)
** libgnutls: Fixed invalid write when gnutls_realloc_zero()
is called with new_size < old_size. This bug caused heap
corruption when gnutls_realloc_zero() has been set as gmp
reallocfunc (!1592, #1367, #1368, #1369).
** API and ABI modifications:
No changes since last version.
* Version 3.7.5 (released 2022-05-15)
** libgnutls: The GNUTLS_NO_TICKETS_TLS12 flag and %NO_TICKETS_TLS12 priority
modifier have been added to disable session ticket usage in TLS 1.2 because
it does not provide forward secrecy (#477). On the other hand, since session
tickets in TLS 1.3 do provide forward secrecy, the PFS priority string now
only disables session tickets in TLS 1.2. Future backward incompatibility:
in the next major release of GnuTLS, we plan to remove those flag and
modifier, and make GNUTLS_NO_TICKETS and %NO_TICKETS only affect TLS 1.2.
** gnutls-cli, gnutls-serv: Channel binding for printing information
has been changed from tls-unique to tls-exporter as tls-unique is
not supported in TLS 1.3.
** libgnutls: Certificate sanity checks has been enhanced to make
gnutls more RFC 5280 compliant (!1583).
Following changes were included:
- critical extensions are parsed when loading x509
certificate to prohibit any random octet strings.
Requires strict-x509 configure option to be enabled
- garbage bits in Key Usage extension are prohibited
- empty DirectoryStrings in Distinguished name structures
of Issuer and Subject name are prohibited
** libgnutls: Removed 3DES from FIPS approved algorithms (#1353).
According to the section 2 of SP800-131A Rev.2, 3DES algorithm
will be disallowed for encryption after December 31, 2023:
https://csrc.nist.gov/publications/detail/sp/800-131a/rev-2/final
** libgnutls: Optimized support for AES-SIV-CMAC algorithms (#1217, #1312).
The existing AEAD API that works in a scatter-gather fashion
(gnutls_aead_cipher_encryptv2) has been extended to support AES-SIV-CMAC.
For further optimization, new function (gnutls_aead_cipher_set_key) has been
added to set key on the existing AEAD handle without re-allocation.
** libgnutls: HKDF and AES-GCM algorithms are now approved in FIPS-140 mode
when used in TLS (#1311).
** The configure arguments for Brotli and Zstandard (zstd) support
have changed to reflect the previous help text: they are now
--with-brotli/--with-zstd respectively (#1342).
** Detecting the Zstandard (zstd) library in configure has been
fixed (#1343).
** API and ABI modifications:
GNUTLS_NO_TICKETS_TLS12: New flag
gnutls_aead_cipher_set_key: New function
* Version 3.7.4 (released 2022-03-17)
** libgnutls: Added support for certificate compression as defined in RFC8879
(#1301). New API functions (gnutls_compress_certificate_get_selected_method
and gnutls_compress_certificate_set_methods) allow client and server to set
their preferences.
** certtool: Added option --compress-cert that allows user to specify
compression methods for certificate compression.
** libgnutls: GnuTLS can now be compiled with --enable-strict-x509 configure
option to enforce stricter certificate sanity checks that are compliant with
RFC5280.
** libgnutls: Removed IA5String type from DirectoryString within issuer
and subject name to make DirectoryString RFC5280 compliant.
** libgnutls: Added function (gnutls_record_send_file) to send file content from
open file descriptor (!1486). The implementation is optimized if KTLS (kernel
TLS) is enabled.
** libgnutls: Added function (gnutls_ciphersuite_get) to retrieve the name of
current ciphersuite from TLS session (#1291).
** libgnutls: The run-time dependency on tpm2-tss is now re-implemented using
dlopen, so GnuTLS does not indirectly link to other crypto libraries until
TPM2 functionality is utilized (!1544).
** API and ABI modifications:
GNUTLS_COMP_BROTLI: New gnutls_compression_method_t enum member
GNUTLS_COMP_ZSTD: New gnutls_compression_method_t enum member
gnutls_compress_certificate_get_selected_method: Added
gnutls_compress_certificate_set_methods: Added
gnutls_ciphersuite_get: New function
gnutls_record_send_file: New function
libgnutlsxx: Soname bumped due to ABI breakage introduced in 3.7.1
* Version 3.7.3 (released 2022-01-17)
** libgnutls: The allowlisting configuration mode has been added to the system-wide
settings. In this mode, all the algorithms are initially marked as insecure
or disabled, while the applications can re-enable them either through the
[overrides] section of the configuration file or the new API (#1172).
** The build infrastructure no longer depends on GNU AutoGen for generating
command-line option handling, template file parsing in certtool, and
documentation generation (#773, #774). This change also removes run-time or
bundled dependency on the libopts library, and requires Python 3.6 or later
to regenerate the distribution tarball.
Note that this brings in known backward incompatibility in command-line
tools, such as long options are now case sensitive, while previously they
were treated in a case insensitive manner: for example --RSA is no longer a
valid option of certtool. The existing scripts using GnuTLS tools may need
adjustment for this change.
** libgnutls: The tpm2-tss-engine compatible private blobs can be loaded and
used as a gnutls_privkey_t (#594). The code was originally written for the
OpenConnect VPN project by David Woodhouse. To generate such blobs, use the
tpm2tss-genkey tool from tpm2-tss-engine:
https://github.com/tpm2-software/tpm2-tss-engine/#rsa-operations
or the tpm2_encodeobject tool from unreleased tpm2-tools.
** libgnutls: The library now transparently enables Linux KTLS
(kernel TLS) when the feature is compiled in with --enable-ktls configuration
option (#1113). If the KTLS initialization fails it automatically falls back
to the user space implementation.
** certtool: The certtool command can now read the Certificate Transparency
(RFC 6962) SCT extension (#232). New API functions are also provided to
access and manipulate the extension values.
** certtool: The certtool command can now generate, manipulate, and evaluate
x25519 and x448 public keys, private keys, and certificates.
** libgnutls: Disabling a hashing algorithm through "insecure-hash"
configuration directive now also disables TLS ciphersuites that use it as a
PRF algorithm.
** libgnutls: PKCS#12 files are now created with modern algorithms by default
(!1499). Previously certtool used PKCS12-3DES-SHA1 for key derivation and
HMAC-SHA1 as an integity measure in PKCS#12. Now it uses AES-128-CBC with
PBKDF2 and SHA-256 for both key derivation and MAC algorithms, and the
default PBKDF2 iteration count has been increased to 600000.
** libgnutls: PKCS#12 keys derived using GOST algorithm now uses
HMAC_GOSTR3411_2012_512 instead of HMAC_GOSTR3411_2012_256 for integrity, to
conform with the latest TC-26 requirements (#1225).
** libgnutls: The library now provides a means to report the status of approved
cryptographic operations (!1465). To adhere to the FIPS140-3 IG 2.4.C., this
complements the existing mechanism to prohibit the use of unapproved
algorithms by making the library unusable state.
** gnutls-cli: The gnutls-cli command now provides a --list-config option to
print the library configuration (!1508).
** libgnutls: Fixed possible race condition in
gnutls_x509_trust_list_verify_crt2 when a single trust list object is shared
among multiple threads (#1277). [GNUTLS-SA-2022-01-17, CVSS: low]
** API and ABI modifications:
GNUTLS_PRIVKEY_FLAG_RSA_PSS_FIXED_SALT_LENGTH: new flag in gnutls_privkey_flags_t
GNUTLS_VERIFY_RSA_PSS_FIXED_SALT_LENGTH: new flag in gnutls_certificate_verify_flags
gnutls_ecc_curve_set_enabled: Added.
gnutls_sign_set_secure: Added.
gnutls_sign_set_secure_for_certs: Added.
gnutls_digest_set_secure: Added.
gnutls_protocol_set_enabled: Added.
gnutls_fips140_context_init: New function
gnutls_fips140_context_deinit: New function
gnutls_fips140_push_context: New function
gnutls_fips140_pop_context: New function
gnutls_fips140_get_operation_state: New function
gnutls_fips140_operation_state_t: New enum
gnutls_transport_is_ktls_enabled: New function
gnutls_get_library_configuration: New function
* Version 3.7.2 (released 2021-05-29)
** libgnutls: The priority string option %DISABLE_TLS13_COMPAT_MODE was added
to disable TLS 1.3 middlebox compatibility mode
** libgnutls: The Linux kernel AF_ALG based acceleration has been added.
This can be enabled with --enable-afalg configure option, when libkcapi
package is installed (#308).
** libgnutls: Fixed timing of early data exchange. Previously, the client was
sending early data after receiving Server Hello, which not only negates the
benefit of 0-RTT, but also works under certain assumptions hold (e.g., the
same ciphersuite is selected in initial and resumption handshake) (#1146).
** certtool: When signing a CSR, CRL distribution point (CDP) is no longer
copied from the signing CA by default (#1126).
** libgnutls: The GNUTLS_NO_EXPLICIT_INIT envvar has been renamed to
GNUTLS_NO_IMPLICIT_INIT to reflect the purpose (#1178). The former is now
deprecated and will be removed in the future releases.
** certtool: When producing certificates and certificate requests, subject DN
components that are provided individually will now be ordered by
assumed scale (e.g. Country before State, Organization before
OrganizationalUnit). This change also affects the order in which
certtool prompts interactively. Please rely on the template
mechanism for automated use of certtool! (#1243)
** API and ABI modifications:
gnutls_early_cipher_get: Added
gnutls_early_prf_hash_get: Added
** guile: Writes to a session record port no longer throw an exception upon
GNUTLS_E_AGAIN or GNUTLS_E_INTERRUPTED.
* Version 3.7.1 (released 2021-03-10)
** libgnutls: Fixed potential use-after-free in sending "key_share"
and "pre_shared_key" extensions. When sending those extensions, the
client may dereference a pointer no longer valid after
realloc. This happens only when the client sends a large Client
Hello message, e.g., when HRR is sent in a resumed session
previously negotiated large FFDHE parameters, because the initial
allocation of the buffer is large enough without having to call
realloc (#1151). [GNUTLS-SA-2021-03-10, CVSS: low]
** libgnutls: Fixed a regression in handling duplicated certs in a
chain (#1131).
** libgnutls: Fixed sending of session ID in TLS 1.3 middlebox
compatibility mode. In that mode the client shall always send a
non-zero session ID to make the handshake resemble the TLS 1.2
resumption; this was not true in the previous versions (#1074).
** libgnutls: W32 performance improvement with a new sendmsg()-like
transport implementation (!1377).
** libgnutls: Removed dependency on the external 'fipscheck' package,
when compiled with --enable-fips140-mode (#1101).
** libgnutls: Added padlock acceleration for AES-192-CBC (#1004).
** API and ABI modifications:
No changes since last version.
* Version 3.7.0 (released 2020-12-02)
** libgnutls: Depend on nettle 3.6 (!1322).
** libgnutls: Added a new API that provides a callback function to
retrieve missing certificates from incomplete certificate chains
(#202, #968, #1100).
** libgnutls: Added a new API that provides a callback function to
output the complete path to the trusted root during certificate
chain verification (#1012).
** libgnutls: OIDs exposed as gnutls_datum_t no longer account for the
terminating null bytes, while the data field is null terminated.
The affected API functions are: gnutls_ocsp_req_get_extension,
gnutls_ocsp_resp_get_response, and gnutls_ocsp_resp_get_extension
(#805).
** libgnutls: Added a new set of API to enable QUIC implementation (#826, #849,
#850).
** libgnutls: The crypto implementation override APIs deprecated in 3.6.9 are
now no-op (#790).
** libgnutls: Added MAGMA/KUZNYECHIK CTR-ACPKM and CMAC support (!1161).
** libgnutls: Support for padlock has been fixed to make it work with Zhaoxin
CPU (#1079).
** libgnutls: The maximum PIN length for PKCS #11 has been increased from 31
bytes to 255 bytes (#932).
** API and ABI modifications:
gnutls_x509_trust_list_set_getissuer_function: Added
gnutls_x509_trust_list_get_ptr: Added
gnutls_x509_trust_list_set_ptr: Added
gnutls_session_set_verify_output_function: Added
gnutls_record_encryption_level_t: New enum
gnutls_handshake_read_func: New callback type
gnutls_handshake_set_read_function: New function
gnutls_handshake_write: New function
gnutls_handshake_secret_func: New callback type
gnutls_handshake_set_secret_function: New function
gnutls_alert_read_func: New callback type
gnutls_alert_set_read_function: New function
gnutls_crypto_register_cipher: Deprecated; no-op
gnutls_crypto_register_aead_cipher: Deprecated; no-op
gnutls_crypto_register_mac: Deprecated; no-op
gnutls_crypto_register_digest: Deprecated; no-op
* Version 3.6.15 (releases 2020-09-04)
** libgnutls: Fixed "no_renegotiation" alert handling at incorrect timing.
The server sending a "no_renegotiation" alert in an unexpected timing,
followed by an invalid second handshake was able to cause a TLS 1.3 client to
crash via a null-pointer dereference. The crash happens in the application's
error handling path, where the gnutls_deinit function is called after
detecting a handshake failure (#1071). [GNUTLS-SA-2020-09-04, CVSS: medium]
** libgnutls: If FIPS self-tests are failed, gnutls_fips140_mode_enabled() now
indicates that with a false return value (!1306).
** libgnutls: Under FIPS mode, the generated ECDH/DH public keys are checked
accordingly to SP800-56A rev 3 (!1295, !1299).
** libgnutls: gnutls_x509_crt_export2() now returns 0 upon success, rather than
the size of the internal base64 blob (#1025). The new behavior aligns to the
existing documentation.
** libgnutls: Certificate verification failure due to OCSP must-stapling is not
honered is now correctly marked with the GNUTLS_CERT_INVALID flag
(!1317). The new behavior aligns to the existing documentation.
** libgnutls: The audit log message for weak hashes is no longer printed twice
(!1301).
** libgnutls: Fixed version negotiation when TLS 1.3 is enabled and TLS 1.2 is
disabled in the priority string. Previously, even when TLS 1.2 is explicitly
disabled with "-VERS-TLS1.2", the server still offered TLS 1.2 if TLS 1.3 is
enabled (#1054).
** API and ABI modifications:
No changes since last version.
* Version 3.6.14 (released 2020-06-03)
** libgnutls: Fixed insecure session ticket key construction, since 3.6.4.
The TLS server would not bind the session ticket encryption key with a
value supplied by the application until the initial key rotation, allowing
attacker to bypass authentication in TLS 1.3 and recover previous
conversations in TLS 1.2 (#1011).
[GNUTLS-SA-2020-06-03, CVSS: high]
** libgnutls: Fixed handling of certificate chain with cross-signed
intermediate CA certificates (#1008).
** libgnutls: Fixed reception of empty session ticket under TLS 1.2 (#997).
** libgnutls: gnutls_x509_crt_print() is enhanced to recognizes commonName
(2.5.4.3), decodes certificate policy OIDs (!1245), and prints Authority
Key Identifier (AKI) properly (#989, #991).
** certtool: PKCS #7 attributes are now printed with symbolic names (!1246).
** libgnutls: Added several improvements on Windows Vista and later releases
(!1257, !1254, !1256). Most notably the system random number generator now
uses Windows BCrypt* API if available (!1255).
** libgnutls: Use accelerated AES-XTS implementation if possible (!1244).
Also both accelerated and non-accelerated implementations check key block
according to FIPS-140-2 IG A.9 (!1233).
** libgnutls: Added support for AES-SIV ciphers (#463).
** libgnutls: Added support for 192-bit AES-GCM cipher (!1267).
** libgnutls: No longer use internal symbols exported from Nettle (!1235)
** API and ABI modifications:
GNUTLS_CIPHER_AES_128_SIV: Added
GNUTLS_CIPHER_AES_256_SIV: Added
GNUTLS_CIPHER_AES_192_GCM: Added
GNUTLS_NO_AUTO_SEND_TICKET: Added
gnutls_ext_get_name2: Added
gnutls_pkcs7_print_signature_info: Added
* Version 3.6.13 (released 2020-03-31)
** libgnutls: Fix a DTLS-protocol regression (caused by TLS1.3 support), since 3.6.3.
The DTLS client would not contribute any randomness to the DTLS negotiation,
breaking the security guarantees of the DTLS protocol (#960)
[GNUTLS-SA-2020-03-31, CVSS: high]
** libgnutls: Added new APIs to access KDF algorithms (#813).
** libgnutls: Added new callback gnutls_keylog_func that enables a custom
logging functionality.
** libgnutls: Added support for non-null terminated usernames in PSK
negotiation (#586).
** gnutls-cli-debug: Improved support for old servers that only support
SSL 3.0.
** API and ABI modifications:
gnutls_hkdf_extract: Added
gnutls_hkdf_expand: Added
gnutls_pbkdf2: Added
gnutls_session_get_keylog_function: Added
gnutls_session_set_keylog_function: Added
gnutls_prf_hash_get: Added
gnutls_psk_server_get_username2: Added
gnutls_psk_set_client_credentials2: Added
gnutls_psk_set_client_credentials_function2: Added
gnutls_psk_set_server_credentials_function2: Added
* Version 3.6.12 (released 2020-02-01)
** libgnutls: Introduced TLS session flag (gnutls_session_get_flags())
to identify sessions that client request OCSP status request (#829).
** libgnutls: Added support for X448 key exchange (RFC 7748) and Ed448
signature algorithm (RFC 8032) under TLS (#86).
** libgnutls: Added the default-priority-string option to system configuration;
it allows overriding the compiled-in default-priority-string.
** libgnutls: Added support for GOST CNT_IMIT ciphersuite (as defined by
draft-smyshlyaev-tls12-gost-suites-07).
By default this ciphersuite is disabled. It can be enabled by adding
+GOST to priority string. In the future this priority string may enable
other GOST ciphersuites as well. Note, that server will fail to negotiate
GOST ciphersuites if TLS 1.3 is enabled both on a server and a client. It
is recommended for now to disable TLS 1.3 in setups where GOST ciphersuites
are enabled on GnuTLS-based servers.
** libgnutls: added priority shortcuts for different GOST categories like
CIPHER-GOST-ALL, MAC-GOST-ALL, KX-GOST-ALL, SIGN-GOST-ALL, GROUP-GOST-ALL.
** libgnutls: Reject certificates with invalid time fields. That is we reject
certificates with invalid characters in Time fields, or invalid time formatting
To continue accepting the invalid form compile with --disable-strict-der-time
(#207, #870).
** libgnutls: Reject certificates which contain duplicate extensions. We were
previously printing warnings when printing such a certificate, but that is
not always sufficient to flag such certificates as invalid. Instead we now
refuse to import them (#887).
** libgnutls: If a CA is found in the trusted list, check in addition to
time validity, whether the algorithms comply to the expected level prior
to accepting it. This addresses the problem of accepting CAs which would
have been marked as insecure otherwise (#877).
** libgnutls: The min-verification-profile from system configuration applies
for all certificate verifications, not only under TLS. The configuration can
be overridden using the GNUTLS_SYSTEM_PRIORITY_FILE environment variable.
** libgnutls: The stapled OCSP certificate verification adheres to the convention
used throughout the library of setting the 'GNUTLS_CERT_INVALID' flag.
** libgnutls: On client side only send OCSP staples if they have been requested
by the server, and on server side always advertise that we support OCSP stapling
(#876).
** libgnutls: Introduced the gnutls_ocsp_req_const_t which is compatible
with gnutls_ocsp_req_t but const.
** certtool: Added the --verify-profile option to set a certificate
verification profile. Use '--verify-profile low' for certificate verification
to apply the 'NORMAL' verification profile.
** certtool: The add_extension template option is considered even when generating
a certificate from a certificate request.
** API and ABI modifications:
GNUTLS_SFLAGS_CLI_REQUESTED_OCSP: Added
GNUTLS_SFLAGS_SERV_REQUESTED_OCSP: Added
gnutls_ocsp_req_const_t: Added
* Version 3.6.11 (released 2019-12-01)
** libgnutls: Use KERN_ARND for the system random number generator on NetBSD.
This syscall provides an endless stream of random numbers from the kernel's
ChaCha20-based random number generator, without blocking or requiring an open file
descriptor.
** libgnutls: Corrected issue with TLS 1.2 session ticket handling as client
during resumption (#841).
** libgnutls: gnutls_base64_decode2() succeeds decoding the empty string to
the empty string. This is a behavioral change of the API but it conforms
to the RFC4648 expectations (#834).
** libgnutls: Fixed AES-CFB8 implementation, when input is shorter than
the block size. Fix backported from nettle.
** certtool: CRL distribution points will be set in CA certificates even when
non self-signed (#765).
** gnutls-cli/serv: added raw public-key handling capabilities (RFC7250).
Key material can be set via the --rawpkkeyfile and --rawpkfile flags.
** API and ABI modifications:
No changes since last version.
* Version 3.6.10 (released 2019-09-29)
** libgnutls: Added support for deterministic ECDSA/DSA (RFC6979)
Deterministic signing can be enabled by setting
GNUTLS_PRIVKEY_FLAG_REPRODUCIBLE when calling gnutls_privkey_sign_*()
functions (#94).
** libgnutls: add gnutls_aead_cipher_encryptv2 and gnutls_aead_cipher_decryptv2
functions that will perform in-place encryption/decryption on data buffers (#718).
** libgnutls: Corrected issue in gnutls_session_get_data2() which could fail under
TLS1.3, if a timeout callback was not set using gnutls_transport_set_pull_timeout_function()
(#823).
** libgnutls: added interoperability tests with gnutls 2.12.x; addressed
issue with large record handling due to random padding (#811).
** libgnutls: the server now selects the highest TLS protocol version,
if TLS 1.3 is enabled and the client advertises an older protocol version first (#837).
** libgnutls: fix non-PIC assembly on i386 (#818).
** libgnutls: added support for GOST 28147-89 cipher in CNT (GOST counter) mode
and MAC generation based on GOST 28147-89 (IMIT). For description of the
modes see RFC 5830. S-Box is id-tc26-gost-28147-param-Z (TC26Z) defined in
RFC 7836.
** certtool: when outputting an encrypted private key do not insert the textual description
of it. This fixes a regression since 3.6.5 (#840).
** API and ABI modifications:
gnutls_aead_cipher_encryptv2: Added
gnutls_aead_cipher_decryptv2: Added
GNUTLS_CIPHER_GOST28147_TC26Z_CNT: Added
GNUTLS_MAC_GOST28147_TC26Z_IMIT: Added
* Version 3.6.9 (released 2019-07-25)
** libgnutls: add gnutls_hash_copy/gnutls_hmac_copy functions that will create a copy
of digest or MAC context. Copying contexts for externally-registered digest and MAC
contexts is unupported (#787).
** Marked the crypto implementation override APIs as deprecated. These APIs are rarely
used, are for a niche use case, but have significant side effects, such as preventing
any internal re-organization and extension of the internal cipher API. The APIs remain
functional though a compiler warning will be issued, and a future minor version update
may transform them to a no-op while keeping ABI compatibility (#789).
** libgnutls: Added support for AES-GMAC, as a separate to GCM, MAC algorithm (#781).
** libgnutls: gnutls_privkey_sign_hash2 now accepts the GNUTLS_PRIVKEY_SIGN_FLAG_TLS1_RSA
flag as documented. This makes it a complete replacement of gnutls_privkey_sign_hash().
** libgnutls: Added support for Generalname registeredID.
** The priority configuration was enhanced to allow more elaborate
system-wide configuration of the library (#587).
The following changes were included:
- The file is read as an ini file with '#' indicating a comment.
- The section "[priorities]" or global follows the existing semantics of
the configuration file, and allows to specify system-wide priority strings
which are accessed with the '@' prefix.
- The section "[overrides]" is added with the parameters "insecure-hash",
"insecure-sig", "insecure-sig-for-cert", "disabled-curve",
"disabled-version", "min-verification-profile", "tls-disabled-cipher",
"tls-disabled-mac", "tls-disabled-group", "tls-disabled-kx", which prohibit
specific algorithms or options globally. Existing algorithms in the
library can be marked as disabled and insecure, but no hard-coded
insecure algorithm can be marked as secure (so that the configuration
cannot be abused to make the system vulnerable).
- Unknown sections or options are skipped with a debug message, unless
the GNUTLS_SYSTEM_PRIORITY_FAIL_ON_INVALID environment parameter is
set to 1.
** libgnutls: Added new flag for GNUTLS_CPUID_OVERRIDE
- 0x20: Enable SHA_NI instruction set
** API and ABI modifications:
gnutls_crypto_register_cipher: Deprecated
gnutls_crypto_register_aead_cipher: Deprecated
gnutls_crypto_register_digest: Deprecated
gnutls_crypto_register_mac: Deprecated
gnutls_get_system_config_file: Added
gnutls_hash_copy: Added
gnutls_hmac_copy: Added
GNUTLS_MAC_AES_GMAC_128: Added
GNUTLS_MAC_AES_GMAC_192: Added
GNUTLS_MAC_AES_CMAC_256: Added
GNUTLS_SAN_REGISTERED_ID: Added
* Version 3.6.8 (released 2019-05-28)
** libgnutls: Added gnutls_prf_early() function to retrieve early keying
material (#329)
** libgnutls: Added support for AES-XTS cipher (#354)
** libgnutls: Fix calculation of Streebog digests (incorrect carry operation in
512 bit addition)
** libgnutls: During Diffie-Hellman operations in TLS, verify that the peer's
public key is on the right subgroup (y^q=1 mod p), when q is available (under
TLS 1.3 and under earlier versions when RFC7919 parameters are used).
** libgnutls: the gnutls_srp_set_server_credentials_function can now be used
with the 8192 parameters as well (#995).
** libgnutls: Fixed bug preventing the use of gnutls_pubkey_verify_data2() and
gnutls_pubkey_verify_hash2() with the GNUTLS_VERIFY_DISABLE_CA_SIGN flag (#754)
** libgnutls: The priority string option %ALLOW_SMALL_RECORDS was added to allow
clients to communicate with the server advertising smaller limits than 512
** libgnutls: Apply STD3 ASCII rules in gnutls_idna_map() to prevent
hostname/domain crafting via IDNA conversion (#720)
** certtool: allow the digital signature key usage flag in CA certificates.
Previously certtool would ignore this flag for CA certificates even if
specified (#767)
** gnutls-cli/serv: added the --keymatexport and --keymatexportsize options.
These allow testing the RFC5705 using these tools.
** API and ABI modifications:
gnutls_prf_early: Added
gnutls_record_set_max_recv_size: Added
gnutls_dh_params_import_raw3: Added
gnutls_ffdhe_2048_group_q: Added
gnutls_ffdhe_3072_group_q: Added
gnutls_ffdhe_4096_group_q: Added
gnutls_ffdhe_6144_group_q: Added
gnutls_ffdhe_8192_group_q: Added
* Version 3.6.7 (released 2019-03-27)
** libgnutls, gnutls tools: Every gnutls_free() will automatically set
the free'd pointer to NULL. This prevents possible use-after-free and
double free issues. Use-after-free will be turned into NULL dereference.
The counter-measure does not extend to applications using gnutls_free().
** libgnutls: Fixed a memory corruption (double free) vulnerability in the
certificate verification API. Reported by Tavis Ormandy; addressed with
the change above. [GNUTLS-SA-2019-03-27, #694]
** libgnutls: Fixed an invalid pointer access via malformed TLS1.3 async messages;
Found using tlsfuzzer. [GNUTLS-SA-2019-03-27, #704]
** libgnutls: enforce key usage limitations on certificates more actively.
Previously we would enforce it for TLS1.2 protocol, now we enforce it
even when TLS1.3 is negotiated, or on client certificates as well. When
an inappropriate for TLS1.3 certificate is seen on the credentials structure
GnuTLS will disable TLS1.3 support for that session (#690).
** libgnutls: the default number of tickets sent under TLS 1.3 was increased to
two. This makes it easier for clients which perform multiple connections
to the server to use the tickets sent by a default server.
** libgnutls: enforce the equality of the two signature parameters fields in
a certificate. We were already enforcing the signature algorithm, but there
was a bug in parameter checking code.
** libgnutls: fixed issue preventing sending and receiving from different
threads when false start was enabled (#713).
** libgnutls: the flag GNUTLS_PKCS11_OBJ_FLAG_LOGIN_SO now implies a writable
session, as non-writeable security officer sessions are undefined in PKCS#11
(#721).
** libgnutls: no longer send downgrade sentinel in TLS 1.3.
Previously the sentinel value was embedded to early in version
negotiation and was sent even on TLS 1.3. It is now sent only when
TLS 1.2 or earlier is negotiated (#689).
** gnutls-cli: Added option --logfile to redirect informational messages output.
** API and ABI modifications:
No changes since last version.
* Version 3.6.6 (released 2019-01-25)
** libgnutls: gnutls_pubkey_import_ecc_raw() was fixed to set the number bits
on the public key (#640).
** libgnutls: Added support for raw public-key authentication as defined in RFC7250.
Raw public-keys can be negotiated by enabling the corresponding certificate
types via the priority strings. The raw public-key mechanism must be explicitly
enabled via the GNUTLS_ENABLE_RAWPK init flag (#26, #280).
** libgnutls: When on server or client side we are sending no extensions we do
not set an empty extensions field but we rather remove that field completely.
This solves a regression since 3.5.x and improves compatibility of the server
side with certain clients.
** libgnutls: We no longer mark RSA keys in PKCS#11 tokens as RSA-PSS capable if
the CKA_SIGN is not set (#667).
** libgnutls: The priority string option %NO_EXTENSIONS was improved to completely
disable extensions at all cases, while providing a functional session. This
also implies that when specified, TLS1.3 is disabled.
** libgnutls: GNUTLS_X509_NO_WELL_DEFINED_EXPIRATION was marked as deprecated.
The previous definition was non-functional (#609).
** API and ABI modifications:
GNUTLS_ENABLE_RAWPK: Added
GNUTLS_ENABLE_CERT_TYPE_NEG: Removed (was no-op; replaced by GNUTLS_ENABLE_RAWPK)
GNUTLS_X509_NO_WELL_DEFINED_EXPIRATION: Deprecated
GNUTLS_PCERT_NO_CERT: Deprecated
* Version 3.6.5 (released 2018-12-01)
** libgnutls: Provide the option of transparent re-handshake/reauthentication
when the GNUTLS_AUTO_REAUTH flag is specified in gnutls_init() (#571).
** libgnutls: Added support for TLS 1.3 zero round-trip (0-RTT) mode (#127)
** libgnutls: The priority functions will ignore and not enable TLS1.3 if
requested with legacy TLS versions enabled but not TLS1.2. That is because
if such a priority string is used in the client side (e.g., TLS1.3+TLS1.0 enabled)
servers which do not support TLS1.3 will negotiate TLS1.2 which will be
rejected by the client as disabled (#621).
** libgnutls: Change RSA decryption to use a new side-channel silent function.
This addresses a security issue where memory access patterns as well as timing
on the underlying Nettle rsa-decrypt function could lead to new Bleichenbacher
attacks. Side-channel resistant code is slower due to the need to mask
access and timings. When used in TLS the new functions cause RSA based
handshakes to be between 13% and 28% slower on average (Numbers are indicative,
the tests where performed on a relatively modern Intel CPU, results vary
depending on the CPU and architecture used). This change makes nettle 3.4.1
the minimum requirement of gnutls (#630). [CVSS: medium]
** libgnutls: gnutls_priority_init() and friends, allow the CTYPE-OPENPGP keyword
in the priority string. It is only accepted as legacy option and is ignored.
** libgnutls: Added support for EdDSA under PKCS#11 (#417)
** libgnutls: Added support for AES-CFB8 cipher (#357)
** libgnutls: Added support for AES-CMAC MAC (#351)
** libgnutls: In two previous versions GNUTLS_CIPHER_GOST28147_CPB/CPC/CPD_CFB ciphers
have incorrectly used CryptoPro-A S-BOX instead of proper (CryptoPro-B/-C/-D
S-BOXes). They are fixed now.
** libgnutls: Added support for GOST key unmasking and unwrapped GOST private
keys parsing, as specified in R 50.1.112-2016.
** gnutls-serv: It applies the default settings when no --priority option is given,
using gnutls_set_default_priority().
** p11tool: Fix initialization of security officer's PIN with the --initialize-so-pin
option (#561)
** certtool: Add parameter --no-text that prevents certtool from outputting
text before PEM-encoded private key, public key, certificate, CRL or CSR.
** API and ABI modifications:
GNUTLS_AUTO_REAUTH: Added
GNUTLS_CIPHER_AES_128_CFB8: Added
GNUTLS_CIPHER_AES_192_CFB8: Added
GNUTLS_CIPHER_AES_256_CFB8: Added
GNUTLS_MAC_AES_CMAC_128: Added
GNUTLS_MAC_AES_CMAC_256: Added
gnutls_record_get_max_early_data_size: Added
gnutls_record_send_early_data: Added
gnutls_record_recv_early_data: Added
gnutls_db_check_entry_expire_time: Added
gnutls_anti_replay_set_add_function: Added
gnutls_anti_replay_init: Added
gnutls_anti_replay_deinit: Added
gnutls_anti_replay_set_window: Added
gnutls_anti_replay_enable: Added
gnutls_privkey_decrypt_data2: Added
* Version 3.6.4 (released 2018-09-24)
** libgnutls: Added the final (RFC8446) version numbering of the TLS1.3 protocol.
** libgnutls: Corrected regression since 3.6.3 in the callbacks set with
gnutls_certificate_set_retrieve_function() which could not handle the case where
no certificates were returned, or the callbacks were set to NULL (see #528).
** libgnutls: gnutls_handshake() on server returns early on handshake when no
certificate is presented by client and the gnutls_init() flag GNUTLS_ENABLE_EARLY_START
is specified.
** libgnutls: Added session ticket key rotation on server side with TOTP.
The key set with gnutls_session_ticket_enable_server() is used as a
master key to generate time-based keys for tickets. The rotation
relates to the gnutls_db_set_cache_expiration() period.
** libgnutls: The 'record size limit' extension is added and preferred to the
'max record size' extension when possible.
** libgnutls: Provide a more flexible PKCS#11 search of trust store certificates.
This addresses the problem where the CA certificate doesn't have a subject key
identifier whereas the end certificates have an authority key identifier (#569)
** libgnutls: gnutls_privkey_export_gost_raw2(), gnutls_privkey_import_gost_raw(),
gnutls_pubkey_export_gost_raw2(), gnutls_pubkey_import_gost_raw() import
and export GOST parameters in the "native" little endian format used for these
curves. This is an intentional incompatible change with 3.6.3.
** libgnutls: Added support for separately negotiating client and server certificate types
as defined in RFC7250. This mechanism must be explicitly enabled via the
GNUTLS_ENABLE_CERT_TYPE_NEG flag in gnutls_init().
** gnutls-cli: enable CRL validation on startup (#564)
** API and ABI modifications:
GNUTLS_ENABLE_EARLY_START: Added
GNUTLS_ENABLE_CERT_TYPE_NEG: Added
GNUTLS_TL_FAIL_ON_INVALID_CRL: Added
GNUTLS_CERTIFICATE_VERIFY_CRLS: Added
gnutls_ctype_target_t: New enumeration
gnutls_record_set_max_early_data_size: Added
gnutls_certificate_type_get2: Added
gnutls_priority_certificate_type_list2: Added
gnutls_ffdhe_6144_group_prime: Added
gnutls_ffdhe_6144_group_generator: Added
gnutls_ffdhe_6144_key_bits: Added
* Version 3.6.3 (released 2018-07-16)
** libgnutls: Introduced support for draft-ietf-tls-tls13-28. It includes version
negotiation, post handshake authentication, length hiding, multiple OCSP support,
consistent ciphersuite support across protocols, hello retry requests, ability
to adjust key shares via gnutls_init() flags, certificate authorities extension,
and key usage limits. TLS1.3 draft-28 support can be enabled by default if
the option --enable-tls13-support is given to configure script.
** libgnutls: Apply compatibility settings for existing applications running with TLS1.2 or
earlier and TLS 1.3. When SRP or NULL ciphersuites are specified in priority strings
TLS 1.3 is will be disabled. When Anonymous ciphersuites are specified in priority
strings, then TLS 1.3 negotiation will be disabled if the session is associated
only with an anonymous credentials structure.
** Added support for Russian Public Key Infrastructure according to RFCs 4491/4357/7836.
This adds support for using GOST keys for digital signatures and under PKCS#7, PKCS#12,
and PKCS#8 standards. In particular added elliptic curves GOST R 34.10-2001 CryptoProA
256-bit curve (RFC 4357), GOST R 34.10-2001 CryptoProXchA 256-bit curve (RFC 4357),
and GOST R 34.10-2012 TC26-512-A 512-bit curve (RFC 7836).
** Provide a uniform cipher list across supported TLS protocols; the CAMELLIA ciphers