Re: [PATCH v2 4/6] qemu_agent: add qemuAgentSSH{Add, Remove, Get}AuthorizedKeys

From: Marc-André Lureau <marcandre.lureau(a)redhat.com&gt; In QEMU 5.2, the guest agent learned to manipulate a user ~/.ssh/authorized_keys. Bind the JSON API to libvirt. https://wiki.qemu.org/ChangeLog/5.2#Guest_agent Signed-off-by: Marc-André Lureau <marcandre.lureau(a)redhat.com&gt; Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- src/qemu/qemu_agent.c | 142 ++++++++++++++++++++++++++++++++++++++++++ src/qemu/qemu_agent.h | 15 +++++ tests/qemuagenttest.c | 79 +++++++++++++++++++++++ 3 files changed, 236 insertions(+) diff --git a/src/qemu/qemu_agent.c b/src/qemu/qemu_agent.c index 7fbb4a9431..aeed74ec31 100644 --- a/src/qemu/qemu_agent.c +++ b/src/qemu/qemu_agent.c @@ -2496,3 +2496,145 @@ qemuAgentSetResponseTimeout(qemuAgentPtr agent, { agent->timeout = timeout; } + +/** + * qemuAgentSSHGetAuthorizedKeys: + * @agent: agent object + * @user: user to get authorized keys for + * @keys: Array of authorized keys + * + * Fetch the public keys from @user's $HOME/.ssh/authorized_keys. + * + * Returns: number of keys returned on success, + * -1 otherwise (error is reported) + */ +int +qemuAgentSSHGetAuthorizedKeys(qemuAgentPtr agent, + const char *user, + char ***keys) +{ + g_autoptr(virJSONValue) cmd = NULL; + g_autoptr(virJSONValue) reply = NULL; + virJSONValuePtr data = NULL; + size_t ndata; + size_t i; + char **keys_ret = NULL; + + if (!(cmd = qemuAgentMakeCommand("guest-ssh-get-authorized-keys", + "s:username", user, + NULL))) + return -1; + + if (qemuAgentCommand(agent, cmd, &reply, agent->timeout) < 0) + return -1; + + if (!(data = virJSONValueObjectGetObject(reply, "return")) || + !(data = virJSONValueObjectGetArray(data, "keys"))) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("qemu agent didn't return an array of keys")); + return -1; + } + + ndata = virJSONValueArraySize(data); + + keys_ret = g_new0(char *, ndata);

+ + for (i = 0; i < ndata; i++) { + virJSONValuePtr entry = virJSONValueArrayGet(data, i); + + if (!entry) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("array element missing in guest-ssh-get-authorized-keys return " + "value"));

+ goto error; + } + + keys_ret[i] = g_strdup(virJSONValueGetString(entry)); + } + + *keys = g_steal_pointer(&keys_ret); + return ndata; + + error: + virStringListFreeCount(keys_ret, ndata); + return -1; +}