gnutls-3.6.12

[Bruce Dubbs]

New point version.

[Bruce Dubbs]

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.

• libgnutls: Added support for X448 key exchange (RFC 7748) and Ed448 signature algorithm (RFC 8032) under TLS.

• 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.

• 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.

• 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.

• 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.

• 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

[Bruce Dubbs]

Fixed at revision 22623.