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ESMTPS id 68ADE100D929; Thu, 1 Oct 2020 07:18:14 +0000 (UTC) Received: from lacos-laptop-7.usersys.redhat.com (ovpn-113-110.ams2.redhat.com [10.36.113.110]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2130555786; Thu, 1 Oct 2020 07:18:06 +0000 (UTC) Subject: Re: [PULL 5/5] crypto/tls-cipher-suites: Produce fw_cfg consumable blob To: Kevin Wolf , =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= References: <20200704163927.28188-1-philmd@redhat.com> <20200704163927.28188-6-philmd@redhat.com> <20200929154651.GC4398@linux.fritz.box> From: Laszlo Ersek Message-ID: Date: Thu, 1 Oct 2020 09:18:06 +0200 MIME-Version: 1.0 In-Reply-To: <20200929154651.GC4398@linux.fritz.box> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=lersek@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=63.128.21.124; envelope-from=lersek@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/01 02:15:30 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -25 X-Spam_score: -2.6 X-Spam_bar: -- X-Spam_report: (-2.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.469, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , "=?UTF-8?Q?Daniel_P._Berrang=c3=a9?=" , qemu-devel@nongnu.org, qemu-block@nongnu.org, Gerd Hoffmann Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 09/29/20 17:46, Kevin Wolf wrote: > Am 04.07.2020 um 18:39 hat Philippe Mathieu-Daudé geschrieben: >> Since our format is consumable by the fw_cfg device, >> we can implement the FW_CFG_DATA_GENERATOR interface. >> >> Example of use to dump the cipher suites (if tracing enabled): >> >> $ qemu-system-x86_64 -S \ >> -object tls-cipher-suites,id=mysuite1,priority=@SYSTEM \ >> -fw_cfg name=etc/path/to/ciphers,gen_id=mysuite1 \ >> -trace qcrypto\* >> 1590664444.197123:qcrypto_tls_cipher_suite_priority priority: @SYSTEM >> 1590664444.197219:qcrypto_tls_cipher_suite_info data=[0x13,0x02] version=TLS1.3 name=TLS_AES_256_GCM_SHA384 >> 1590664444.197228:qcrypto_tls_cipher_suite_info data=[0x13,0x03] version=TLS1.3 name=TLS_CHACHA20_POLY1305_SHA256 >> 1590664444.197233:qcrypto_tls_cipher_suite_info data=[0x13,0x01] version=TLS1.3 name=TLS_AES_128_GCM_SHA256 >> 1590664444.197236:qcrypto_tls_cipher_suite_info data=[0x13,0x04] version=TLS1.3 name=TLS_AES_128_CCM_SHA256 >> 1590664444.197240:qcrypto_tls_cipher_suite_info data=[0xc0,0x30] version=TLS1.2 name=TLS_ECDHE_RSA_AES_256_GCM_SHA384 >> 1590664444.197245:qcrypto_tls_cipher_suite_info data=[0xcc,0xa8] version=TLS1.2 name=TLS_ECDHE_RSA_CHACHA20_POLY1305 >> 1590664444.197250:qcrypto_tls_cipher_suite_info data=[0xc0,0x14] version=TLS1.0 name=TLS_ECDHE_RSA_AES_256_CBC_SHA1 >> 1590664444.197254:qcrypto_tls_cipher_suite_info data=[0xc0,0x2f] version=TLS1.2 name=TLS_ECDHE_RSA_AES_128_GCM_SHA256 >> 1590664444.197258:qcrypto_tls_cipher_suite_info data=[0xc0,0x13] version=TLS1.0 name=TLS_ECDHE_RSA_AES_128_CBC_SHA1 >> 1590664444.197261:qcrypto_tls_cipher_suite_info data=[0xc0,0x2c] version=TLS1.2 name=TLS_ECDHE_ECDSA_AES_256_GCM_SHA384 >> 1590664444.197266:qcrypto_tls_cipher_suite_info data=[0xcc,0xa9] version=TLS1.2 name=TLS_ECDHE_ECDSA_CHACHA20_POLY1305 >> 1590664444.197270:qcrypto_tls_cipher_suite_info data=[0xc0,0xad] version=TLS1.2 name=TLS_ECDHE_ECDSA_AES_256_CCM >> 1590664444.197274:qcrypto_tls_cipher_suite_info data=[0xc0,0x0a] version=TLS1.0 name=TLS_ECDHE_ECDSA_AES_256_CBC_SHA1 >> 1590664444.197278:qcrypto_tls_cipher_suite_info data=[0xc0,0x2b] version=TLS1.2 name=TLS_ECDHE_ECDSA_AES_128_GCM_SHA256 >> 1590664444.197283:qcrypto_tls_cipher_suite_info data=[0xc0,0xac] version=TLS1.2 name=TLS_ECDHE_ECDSA_AES_128_CCM >> 1590664444.197287:qcrypto_tls_cipher_suite_info data=[0xc0,0x09] version=TLS1.0 name=TLS_ECDHE_ECDSA_AES_128_CBC_SHA1 >> 1590664444.197291:qcrypto_tls_cipher_suite_info data=[0x00,0x9d] version=TLS1.2 name=TLS_RSA_AES_256_GCM_SHA384 >> 1590664444.197296:qcrypto_tls_cipher_suite_info data=[0xc0,0x9d] version=TLS1.2 name=TLS_RSA_AES_256_CCM >> 1590664444.197300:qcrypto_tls_cipher_suite_info data=[0x00,0x35] version=TLS1.0 name=TLS_RSA_AES_256_CBC_SHA1 >> 1590664444.197304:qcrypto_tls_cipher_suite_info data=[0x00,0x9c] version=TLS1.2 name=TLS_RSA_AES_128_GCM_SHA256 >> 1590664444.197308:qcrypto_tls_cipher_suite_info data=[0xc0,0x9c] version=TLS1.2 name=TLS_RSA_AES_128_CCM >> 1590664444.197312:qcrypto_tls_cipher_suite_info data=[0x00,0x2f] version=TLS1.0 name=TLS_RSA_AES_128_CBC_SHA1 >> 1590664444.197316:qcrypto_tls_cipher_suite_info data=[0x00,0x9f] version=TLS1.2 name=TLS_DHE_RSA_AES_256_GCM_SHA384 >> 1590664444.197320:qcrypto_tls_cipher_suite_info data=[0xcc,0xaa] version=TLS1.2 name=TLS_DHE_RSA_CHACHA20_POLY1305 >> 1590664444.197325:qcrypto_tls_cipher_suite_info data=[0xc0,0x9f] version=TLS1.2 name=TLS_DHE_RSA_AES_256_CCM >> 1590664444.197329:qcrypto_tls_cipher_suite_info data=[0x00,0x39] version=TLS1.0 name=TLS_DHE_RSA_AES_256_CBC_SHA1 >> 1590664444.197333:qcrypto_tls_cipher_suite_info data=[0x00,0x9e] version=TLS1.2 name=TLS_DHE_RSA_AES_128_GCM_SHA256 >> 1590664444.197337:qcrypto_tls_cipher_suite_info data=[0xc0,0x9e] version=TLS1.2 name=TLS_DHE_RSA_AES_128_CCM >> 1590664444.197341:qcrypto_tls_cipher_suite_info data=[0x00,0x33] version=TLS1.0 name=TLS_DHE_RSA_AES_128_CBC_SHA1 >> 1590664444.197345:qcrypto_tls_cipher_suite_count count: 29 >> >> Signed-off-by: Philippe Mathieu-Daudé >> Reviewed-by: Daniel P. Berrangé >> Acked-by: Laszlo Ersek >> Message-Id: <20200623172726.21040-6-philmd@redhat.com> > > I noticed only now that this breaks '--object help' in > qemu-storage-daemon: > > $ qemu-storage-daemon --object help > List of user creatable objects: > qemu-storage-daemon: missing interface 'fw_cfg-data-generator' for object 'tls-creds' > Aborted (core dumped) > > The reason is that we don't (and can't) link hw/nvram/fw_cfg.c into the > storage daemon because it requires other system emulator stuff. Ouch. I've been completely oblivious to "--object help" and how it affects qemu-storage-daemon. Sorry about that. Could you please include a backtrace about the abort()? Grepping for the error message, I can find type_initialize() in "qom/object.c", but my knowledge about QOM internals is practically nil. The error message seems bogus FWIW -- why would TYPE_FW_CFG_DATA_GENERATOR_INTERFACE be *required* from "tls-creds"? TYPE_FW_CFG_DATA_GENERATOR_INTERFACE is implemented by "tls-cipher-suites", and required by "-fw_cfg name=...,gen_id=...". If that -fw_cfg switch is not used, then why would anything look for the TYPE_FW_CFG_DATA_GENERATOR_INTERFACE interface? Especially under the tls-creds object? Thanks, Laszlo