From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AFB28C433EF for ; Wed, 20 Apr 2022 10:50:13 +0000 (UTC) Received: from localhost ([::1]:58184 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nh7uW-0002aR-Ln for qemu-devel@archiver.kernel.org; Wed, 20 Apr 2022 06:50:12 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59038) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nh7eS-0001Ph-VY for qemu-devel@nongnu.org; Wed, 20 Apr 2022 06:33:39 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:21795) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nh7eQ-0006rk-GU for qemu-devel@nongnu.org; Wed, 20 Apr 2022 06:33:36 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1650450813; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=PGZiyoaMXsTdYjGrGiMzB2k5dQMS90Hz8LbniPPwScw=; b=CGkuK2xUF6iwOwZsQanplWDfUOvhIUZgnJ7K7KrAXmZG5VanB8NTO6TqpkxMn3//zrjHqO T1gvDk/lV5hPlQ6uesiJc9PdjVPXNuHzjykjGNk/CG15GGCWhUj7w7lNpliEyoBOYx+hmG tsJh9P5LOYlxJ3W6QBUY0ckJhUmRU7c= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-290-WWUymrdsNoOzqYqma9k8TQ-1; Wed, 20 Apr 2022 06:33:28 -0400 X-MC-Unique: WWUymrdsNoOzqYqma9k8TQ-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 8F0C8803533; Wed, 20 Apr 2022 10:33:27 +0000 (UTC) Received: from thuth.com (unknown [10.39.195.200]) by smtp.corp.redhat.com (Postfix) with ESMTP id CC04DC44AE2; Wed, 20 Apr 2022 10:33:24 +0000 (UTC) From: Thomas Huth To: qemu-devel@nongnu.org, Richard Henderson , Peter Maydell Subject: [PULL 5/7] docs/ccid: convert to restructuredText Date: Wed, 20 Apr 2022 12:33:07 +0200 Message-Id: <20220420103309.264479-6-thuth@redhat.com> In-Reply-To: <20220420103309.264479-1-thuth@redhat.com> References: <20220420103309.264479-1-thuth@redhat.com> MIME-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.85 on 10.11.54.8 Received-SPF: pass client-ip=170.10.133.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Damien Hedde , Lucas Ramage Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Lucas Ramage Buglink: https://gitlab.com/qemu-project/qemu/-/issues/527 Signed-off-by: Lucas Ramage Message-Id: <20220405142906.21382-1-oxr463@gmx.us> Reviewed-by: Damien Hedde [thuth: Added some cosmetic fixes] Signed-off-by: Thomas Huth --- docs/ccid.txt | 182 ------------------------------- docs/system/device-emulation.rst | 1 + docs/system/devices/ccid.rst | 171 +++++++++++++++++++++++++++++ 3 files changed, 172 insertions(+), 182 deletions(-) delete mode 100644 docs/ccid.txt create mode 100644 docs/system/devices/ccid.rst diff --git a/docs/ccid.txt b/docs/ccid.txt deleted file mode 100644 index 2b85b1bd42..0000000000 --- a/docs/ccid.txt +++ /dev/null @@ -1,182 +0,0 @@ -QEMU CCID Device Documentation. - -Contents -1. USB CCID device -2. Building -3. Using ccid-card-emulated with hardware -4. Using ccid-card-emulated with certificates -5. Using ccid-card-passthru with client side hardware -6. Using ccid-card-passthru with client side certificates -7. Passthrough protocol scenario -8. libcacard - -1. USB CCID device - -The USB CCID device is a USB device implementing the CCID specification, which -lets one connect smart card readers that implement the same spec. For more -information see the specification: - - Universal Serial Bus - Device Class: Smart Card - CCID - Specification for - Integrated Circuit(s) Cards Interface Devices - Revision 1.1 - April 22rd, 2005 - -Smartcards are used for authentication, single sign on, decryption in -public/private schemes and digital signatures. A smartcard reader on the client -cannot be used on a guest with simple usb passthrough since it will then not be -available on the client, possibly locking the computer when it is "removed". On -the other hand this device can let you use the smartcard on both the client and -the guest machine. It is also possible to have a completely virtual smart card -reader and smart card (i.e. not backed by a physical device) using this device. - -2. Building - -The cryptographic functions and access to the physical card is done via the -libcacard library, whose development package must be installed prior to -building QEMU: - -In redhat/fedora: - yum install libcacard-devel -In ubuntu: - apt-get install libcacard-dev - -Configuring and building: - ./configure --enable-smartcard && make - - -3. Using ccid-card-emulated with hardware - -Assuming you have a working smartcard on the host with the current -user, using libcacard, QEMU acts as another client using ccid-card-emulated: - - qemu -usb -device usb-ccid -device ccid-card-emulated - - -4. Using ccid-card-emulated with certificates stored in files - -You must create the CA and card certificates. This is a one time process. -We use NSS certificates: - - mkdir fake-smartcard - cd fake-smartcard - certutil -N -d sql:$PWD - certutil -S -d sql:$PWD -s "CN=Fake Smart Card CA" -x -t TC,TC,TC -n fake-smartcard-ca - certutil -S -d sql:$PWD -t ,, -s "CN=John Doe" -n id-cert -c fake-smartcard-ca - certutil -S -d sql:$PWD -t ,, -s "CN=John Doe (signing)" --nsCertType smime -n signing-cert -c fake-smartcard-ca - certutil -S -d sql:$PWD -t ,, -s "CN=John Doe (encryption)" --nsCertType sslClient -n encryption-cert -c fake-smartcard-ca - -Note: you must have exactly three certificates. - -You can use the emulated card type with the certificates backend: - - qemu -usb -device usb-ccid -device ccid-card-emulated,backend=certificates,db=sql:$PWD,cert1=id-cert,cert2=signing-cert,cert3=encryption-cert - -To use the certificates in the guest, export the CA certificate: - - certutil -L -r -d sql:$PWD -o fake-smartcard-ca.cer -n fake-smartcard-ca - -and import it in the guest: - - certutil -A -d /etc/pki/nssdb -i fake-smartcard-ca.cer -t TC,TC,TC -n fake-smartcard-ca - -In a Linux guest you can then use the CoolKey PKCS #11 module to access -the card: - - certutil -d /etc/pki/nssdb -L -h all - -It will prompt you for the PIN (which is the password you assigned to the -certificate database early on), and then show you all three certificates -together with the manually imported CA cert: - - Certificate Nickname Trust Attributes - fake-smartcard-ca CT,C,C - John Doe:CAC ID Certificate u,u,u - John Doe:CAC Email Signature Certificate u,u,u - John Doe:CAC Email Encryption Certificate u,u,u - -If this does not happen, CoolKey is not installed or not registered with -NSS. Registration can be done from Firefox or the command line: - - modutil -dbdir /etc/pki/nssdb -add "CAC Module" -libfile /usr/lib64/pkcs11/libcoolkeypk11.so - modutil -dbdir /etc/pki/nssdb -list - - -5. Using ccid-card-passthru with client side hardware - -on the host specify the ccid-card-passthru device with a suitable chardev: - - qemu -chardev socket,server=on,host=0.0.0.0,port=2001,id=ccid,wait=off \ - -usb -device usb-ccid -device ccid-card-passthru,chardev=ccid - -on the client run vscclient, built when you built QEMU: - - vscclient 2001 - - -6. Using ccid-card-passthru with client side certificates - -This case is not particularly useful, but you can use it to debug -your setup if #4 works but #5 does not. - -Follow instructions as per #4, except run QEMU and vscclient as follows: -Run qemu as per #5, and run vscclient from the "fake-smartcard" -directory as follows: - - qemu -chardev socket,server=on,host=0.0.0.0,port=2001,id=ccid,wait=off \ - -usb -device usb-ccid -device ccid-card-passthru,chardev=ccid - vscclient -e "db=\"sql:$PWD\" use_hw=no soft=(,Test,CAC,,id-cert,signing-cert,encryption-cert)" 2001 - - -7. Passthrough protocol scenario - -This is a typical interchange of messages when using the passthru card device. -usb-ccid is a usb device. It defaults to an unattached usb device on startup. -usb-ccid expects a chardev and expects the protocol defined in -cac_card/vscard_common.h to be passed over that. -The usb-ccid device can be in one of three modes: - * detached - * attached with no card - * attached with card - -A typical interchange is: (the arrow shows who started each exchange, it can be client -originated or guest originated) - -client event | vscclient | passthru | usb-ccid | guest event ----------------------------------------------------------------------------------------------- - | VSC_Init | | | - | VSC_ReaderAdd | | attach | - | | | | sees new usb device. -card inserted -> | | | | - | VSC_ATR | insert | insert | see new card - | | | | - | VSC_APDU | VSC_APDU | | <- guest sends APDU -client<->physical | | | | -card APDU exchange| | | | -client response ->| VSC_APDU | VSC_APDU | | receive APDU response - ... - [APDU<->APDU repeats several times] - ... -card removed -> | | | | - | VSC_CardRemove | remove | remove | card removed - ... - [(card insert, apdu's, card remove) repeat] - ... -kill/quit | | | | - vscclient | | | | - | VSC_ReaderRemove | | detach | - | | | | usb device removed. - - -8. libcacard - -Both ccid-card-emulated and vscclient use libcacard as the card emulator. -libcacard implements a completely virtual CAC (DoD standard for smart -cards) compliant card and uses NSS to retrieve certificates and do -any encryption. The backend can then be a real reader and card, or -certificates stored in files. - -For documentation of the library see docs/libcacard.txt. - diff --git a/docs/system/device-emulation.rst b/docs/system/device-emulation.rst index 0b3a3d73ad..ae8dd233e8 100644 --- a/docs/system/device-emulation.rst +++ b/docs/system/device-emulation.rst @@ -83,6 +83,7 @@ Emulated Devices :maxdepth: 1 devices/can.rst + devices/ccid.rst devices/ivshmem.rst devices/net.rst devices/nvme.rst diff --git a/docs/system/devices/ccid.rst b/docs/system/devices/ccid.rst new file mode 100644 index 0000000000..3b8c2ab46a --- /dev/null +++ b/docs/system/devices/ccid.rst @@ -0,0 +1,171 @@ +Chip Card Interface Device (CCID) +================================= + +USB CCID device +--------------- +The USB CCID device is a USB device implementing the CCID specification, which +lets one connect smart card readers that implement the same spec. For more +information see the specification:: + + Universal Serial Bus + Device Class: Smart Card + CCID + Specification for + Integrated Circuit(s) Cards Interface Devices + Revision 1.1 + April 22rd, 2005 + +Smartcards are used for authentication, single sign on, decryption in +public/private schemes and digital signatures. A smartcard reader on the client +cannot be used on a guest with simple usb passthrough since it will then not be +available on the client, possibly locking the computer when it is "removed". On +the other hand this device can let you use the smartcard on both the client and +the guest machine. It is also possible to have a completely virtual smart card +reader and smart card (i.e. not backed by a physical device) using this device. + +Building +-------- +The cryptographic functions and access to the physical card is done via the +libcacard library, whose development package must be installed prior to +building QEMU: + +In redhat/fedora:: + + yum install libcacard-devel + +In ubuntu:: + + apt-get install libcacard-dev + +Configuring and building:: + + ./configure --enable-smartcard && make + +Using ccid-card-emulated with hardware +-------------------------------------- +Assuming you have a working smartcard on the host with the current +user, using libcacard, QEMU acts as another client using ccid-card-emulated:: + + qemu -usb -device usb-ccid -device ccid-card-emulated + +Using ccid-card-emulated with certificates stored in files +---------------------------------------------------------- +You must create the CA and card certificates. This is a one time process. +We use NSS certificates:: + + mkdir fake-smartcard + cd fake-smartcard + certutil -N -d sql:$PWD + certutil -S -d sql:$PWD -s "CN=Fake Smart Card CA" -x -t TC,TC,TC -n fake-smartcard-ca + certutil -S -d sql:$PWD -t ,, -s "CN=John Doe" -n id-cert -c fake-smartcard-ca + certutil -S -d sql:$PWD -t ,, -s "CN=John Doe (signing)" --nsCertType smime -n signing-cert -c fake-smartcard-ca + certutil -S -d sql:$PWD -t ,, -s "CN=John Doe (encryption)" --nsCertType sslClient -n encryption-cert -c fake-smartcard-ca + +Note: you must have exactly three certificates. + +You can use the emulated card type with the certificates backend:: + + qemu -usb -device usb-ccid -device ccid-card-emulated,backend=certificates,db=sql:$PWD,cert1=id-cert,cert2=signing-cert,cert3=encryption-cert + +To use the certificates in the guest, export the CA certificate:: + + certutil -L -r -d sql:$PWD -o fake-smartcard-ca.cer -n fake-smartcard-ca + +and import it in the guest:: + + certutil -A -d /etc/pki/nssdb -i fake-smartcard-ca.cer -t TC,TC,TC -n fake-smartcard-ca + +In a Linux guest you can then use the CoolKey PKCS #11 module to access +the card:: + + certutil -d /etc/pki/nssdb -L -h all + +It will prompt you for the PIN (which is the password you assigned to the +certificate database early on), and then show you all three certificates +together with the manually imported CA cert:: + + Certificate Nickname Trust Attributes + fake-smartcard-ca CT,C,C + John Doe:CAC ID Certificate u,u,u + John Doe:CAC Email Signature Certificate u,u,u + John Doe:CAC Email Encryption Certificate u,u,u + +If this does not happen, CoolKey is not installed or not registered with +NSS. Registration can be done from Firefox or the command line:: + + modutil -dbdir /etc/pki/nssdb -add "CAC Module" -libfile /usr/lib64/pkcs11/libcoolkeypk11.so + modutil -dbdir /etc/pki/nssdb -list + +Using ccid-card-passthru with client side hardware +-------------------------------------------------- +On the host specify the ccid-card-passthru device with a suitable chardev:: + + qemu -chardev socket,server=on,host=0.0.0.0,port=2001,id=ccid,wait=off \ + -usb -device usb-ccid -device ccid-card-passthru,chardev=ccid + +On the client run vscclient, built when you built QEMU:: + + vscclient 2001 + +Using ccid-card-passthru with client side certificates +------------------------------------------------------ +This case is not particularly useful, but you can use it to debug +your setup. + +Follow instructions above, except run QEMU and vscclient as follows. + +Run qemu as per above, and run vscclient from the "fake-smartcard" +directory as follows:: + + qemu -chardev socket,server=on,host=0.0.0.0,port=2001,id=ccid,wait=off \ + -usb -device usb-ccid -device ccid-card-passthru,chardev=ccid + vscclient -e "db=\"sql:$PWD\" use_hw=no soft=(,Test,CAC,,id-cert,signing-cert,encryption-cert)" 2001 + + +Passthrough protocol scenario +----------------------------- +This is a typical interchange of messages when using the passthru card device. +usb-ccid is a usb device. It defaults to an unattached usb device on startup. +usb-ccid expects a chardev and expects the protocol defined in +cac_card/vscard_common.h to be passed over that. +The usb-ccid device can be in one of three modes: + +* detached +* attached with no card +* attached with card + +A typical interchange is (the arrow shows who started each exchange, it can be client +originated or guest originated):: + + client event | vscclient | passthru | usb-ccid | guest event + ------------------------------------------------------------------------------------------------ + | VSC_Init | | | + | VSC_ReaderAdd | | attach | + | | | | sees new usb device. + card inserted -> | | | | + | VSC_ATR | insert | insert | see new card + | | | | + | VSC_APDU | VSC_APDU | | <- guest sends APDU + client <-> physical | | | | + card APDU exchange | | | | + client response -> | VSC_APDU | VSC_APDU | | receive APDU response + ... + [APDU<->APDU repeats several times] + ... + card removed -> | | | | + | VSC_CardRemove | remove | remove | card removed + ... + [(card insert, apdu's, card remove) repeat] + ... + kill/quit | | | | + vscclient | | | | + | VSC_ReaderRemove | | detach | + | | | | usb device removed. + +libcacard +--------- +Both ccid-card-emulated and vscclient use libcacard as the card emulator. +libcacard implements a completely virtual CAC (DoD standard for smart +cards) compliant card and uses NSS to retrieve certificates and do +any encryption. The backend can then be a real reader and card, or +certificates stored in files. -- 2.27.0