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 3.7.0 (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 failue 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 overriden 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 competely.
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 seperately 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
...
ABI Laboratory
