[libvirt] [PATCH v2 00/21] Add support for vTPM state encryption

This series of patches addresses the RFE in BZ 172830: https://bugzilla.redhat.com/show_bug.cgi?id=1728030 This series of patches adds support for vTPM state encryption by passing the read-end of a pipe's file descriptor to 'swtpm_setup' and 'swtpm' where they can read a passphrase from and derive a key from that passphrase. The TPM's domain XML looks to enable state encryption looks like this: <tpm model='tpm-tis'> <backend type='emulator' version='1.2'> <encryption format='vtpm'> <secret type='passphrase' uuid='2c9ceaba-c6ef-4f38-86fd-6e3adb2df5cd'/> </encryption> </backend> <alias name='tpm0'/> </tpm> The vTPM secret holding the passphrase looks like this: <secret ephemeral='no' private='yes'> <uuid>2c9ceaba-c6ef-4f38-86fd-6e3adb2df5cd</uuid> <description>vTPM passphrase example</description> <usage type='vtpm'> <name>vtpm_example</name> </usage> </secret> The swtpm v0.2 (upcoming) is needed that supports the command line option --print-capabilities returning a JSON object that identifies features added since v0.1. One such features is the possibility to pass a passphrase via a file descriptor. The patches do some refactoring of existing code on the way. Stefan v1->v2: - Added Marc-André's R-bs - Addressed comments - Added patches to extend virCommand to be able to write contents of multiple buffers to file descriptors for a spawned process to read from Stefan Berger (21): secret: Add support for usage type vTPM, extend schema and test case tests: Add already existing test case tpm-emulator-tpm2 util: Add VIR_STORAGE_ENCRYPTION_FORMAT_VTPM conf: Extend TPM XML parser with encryption support schema: Extend the TPM XML schema with support for encryption tests: Add test for TPM XML encryption parser and formatter tests: Add tests for QEMU command line generation with encrypted TPM tpm: Move virtpm.c from utils dir to own tpm dir tpm: Move qemuTPMEmulatorInit to virTPMEmulatorInit in virtpm.c tpm: Refactor virTPMEmulatorInit to use loop tpm: Check whether previously found executables were updated tpm: Parse the capabilities supported by swtpm and swtpm_setup utils: Implement function to pass a buffer to send via a fd to virCommand utils: Convert pollfd array to be allocated utils: Write a maximum of MAX_PIPE_FEED_BYTES into a pipe utils: Extend virCommandProcessIO to including the send buffers tpm: Use fd to pass password to swtpm_setup and swtpm tpm: Pass migration key passphrase via fd to swtpm tpm: Check TPM XML device configuration changes after edit docs: Extend Secret XML documentation with vtpm usage type docs: Extend TPM docs with new encryption element docs/formatdomain.html.in | 16 + docs/formatsecret.html.in | 61 +++- docs/schemas/domaincommon.rng | 30 ++ docs/schemas/secret.rng | 10 + include/libvirt/libvirt-secret.h | 1 + po/POTFILES | 2 +- src/Makefile.am | 1 + src/conf/Makefile.inc.am | 7 + src/conf/domain_conf.c | 96 +++++- src/conf/domain_conf.h | 5 + src/conf/secret_conf.c | 13 + src/conf/virtpm_conf.c | 36 ++ src/conf/virtpm_conf.h | 36 ++ src/libvirt_private.syms | 21 +- src/qemu/Makefile.inc.am | 1 + src/qemu/qemu_block.c | 1 + src/qemu/qemu_driver.c | 28 ++ src/qemu/qemu_extdevice.c | 2 +- src/qemu/qemu_extdevice.h | 3 + src/qemu/qemu_tpm.c | 197 ++++++----- src/security/Makefile.inc.am | 1 + src/tpm/Makefile.inc.am | 20 ++ src/tpm/virtpm.c | 325 ++++++++++++++++++ src/{util => tpm}/virtpm.h | 8 + src/util/Makefile.inc.am | 2 - src/util/vircommand.c | 139 +++++++- src/util/vircommand.h | 5 + src/util/virsecret.c | 2 +- src/util/virstorageencryption.c | 2 +- src/util/virstorageencryption.h | 1 + src/util/virtpm.c | 74 ---- tests/Makefile.am | 1 + .../tpm-emulator-tpm2-enc.x86_64-latest.args | 35 ++ .../tpm-emulator-tpm2-enc.xml | 34 ++ tests/qemuxml2argvtest.c | 1 + .../tpm-emulator-tpm2-enc.xml | 38 ++ tests/qemuxml2xmltest.c | 2 + tests/secretxml2xmlin/usage-vtpm.xml | 7 + tests/secretxml2xmltest.c | 1 + 39 files changed, 1099 insertions(+), 166 deletions(-) create mode 100644 src/conf/virtpm_conf.c create mode 100644 src/conf/virtpm_conf.h create mode 100644 src/tpm/Makefile.inc.am create mode 100644 src/tpm/virtpm.c rename src/{util => tpm}/virtpm.h (77%) delete mode 100644 src/util/virtpm.c create mode 100644 tests/qemuxml2argvdata/tpm-emulator-tpm2-enc.x86_64-latest.args create mode 100644 tests/qemuxml2argvdata/tpm-emulator-tpm2-enc.xml create mode 100644 tests/qemuxml2xmloutdata/tpm-emulator-tpm2-enc.xml create mode 100644 tests/secretxml2xmlin/usage-vtpm.xml -- 2.20.1