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Permission Manager: add permission management for screencopy (#9930)

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Vaxry 2025-04-08 19:39:53 +02:00 • committed by GitHub
parent 642f394eb3
commit 260d8e1f71
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13 changed files with 481 additions and 32 deletions
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src/managers/permissions/DynamicPermissionManager.cpp Normal file
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#include <re2/re2.h>
#include "DynamicPermissionManager.hpp"
#include <algorithm>
#include <wayland-server-core.h>
#include <expected>
#include <filesystem>
#include "../../Compositor.hpp"
#include "../../config/ConfigValue.hpp"
#if defined(__DragonFly__) || defined(__FreeBSD__) || defined(__NetBSD__)
#include <sys/sysctl.h>
#endif
static void clientDestroyInternal(struct wl_listener* listener, void* data) {
SDynamicPermissionRuleDestroyWrapper* wrap = wl_container_of(listener, wrap, listener);
CDynamicPermissionRule* rule = wrap->parent;
g_pDynamicPermissionManager->removeRulesForClient(rule->client());
}
CDynamicPermissionRule::CDynamicPermissionRule(const std::string& binaryPathRegex, eDynamicPermissionType type, eDynamicPermissionAllowMode defaultAllowMode) :
m_type(type), m_source(PERMISSION_RULE_SOURCE_CONFIG), m_binaryRegex(makeUnique<re2::RE2>(binaryPathRegex)), m_allowMode(defaultAllowMode) {
;
}
CDynamicPermissionRule::CDynamicPermissionRule(wl_client* const client, eDynamicPermissionType type, eDynamicPermissionAllowMode defaultAllowMode) :
m_type(type), m_source(PERMISSION_RULE_SOURCE_RUNTIME_USER), m_client(client), m_allowMode(defaultAllowMode) {
wl_list_init(&m_destroyWrapper.listener.link);
m_destroyWrapper.listener.notify = ::clientDestroyInternal;
m_destroyWrapper.parent = this;
wl_display_add_destroy_listener(g_pCompositor->m_sWLDisplay, &m_destroyWrapper.listener);
}
CDynamicPermissionRule::~CDynamicPermissionRule() {
if (m_client) {
wl_list_remove(&m_destroyWrapper.listener.link);
wl_list_init(&m_destroyWrapper.listener.link);
}
if (m_dialogBox && m_dialogBox->isRunning())
m_dialogBox->kill();
}
wl_client* CDynamicPermissionRule::client() const {
return m_client;
}
static const char* permissionToString(eDynamicPermissionType type) {
switch (type) {
case PERMISSION_TYPE_UNKNOWN: return "PERMISSION_TYPE_UNKNOWN";
case PERMISSION_TYPE_SCREENCOPY: return "PERMISSION_TYPE_SCREENCOPY";
}
return "error";
}
static const char* permissionToHumanString(eDynamicPermissionType type) {
switch (type) {
case PERMISSION_TYPE_UNKNOWN: return "requesting an unknown permission";
case PERMISSION_TYPE_SCREENCOPY: return "trying to capture your screen";
}
return "error";
}
static std::expected<std::string, std::string> binaryNameForWlClient(wl_client* client) {
pid_t pid = 0;
wl_client_get_credentials(client, &pid, nullptr, nullptr);
if (pid <= 0)
return std::unexpected("No pid for client");
#if defined(KERN_PROC_PATHNAME)
int mib[] = {
CTL_KERN,
#if defined(__NetBSD__)
KERN_PROC_ARGS,
pid,
KERN_PROC_PATHNAME,
#else
KERN_PROC,
KERN_PROC_PATHNAME,
pid,
#endif
};
u_int miblen = sizeof(mib) / sizeof(mib[0]);
char exe[PATH_MAX] = "/nonexistent";
size_t sz = sizeof(exe);
sysctl(mib, miblen, &exe, &sz, NULL, 0);
std::string path = exe;
#else
std::string path = std::format("/proc/{}/exe", (uint64_t)pid);
#endif
std::error_code ec;
std::string fullPath = std::filesystem::canonical(path, ec);
if (ec)
return std::unexpected("canonical failed");
return fullPath;
}
void CDynamicPermissionManager::clearConfigPermissions() {
std::erase_if(m_rules, [](const auto& e) { return e->m_source == PERMISSION_RULE_SOURCE_CONFIG; });
}
void CDynamicPermissionManager::addConfigPermissionRule(const std::string& binaryName, eDynamicPermissionType type, eDynamicPermissionAllowMode mode) {
m_rules.emplace_back(SP<CDynamicPermissionRule>(new CDynamicPermissionRule(binaryName, type, mode)));
}
eDynamicPermissionAllowMode CDynamicPermissionManager::clientPermissionMode(wl_client* client, eDynamicPermissionType permission) {
static auto PPERM = CConfigValue<Hyprlang::INT>("ecosystem:enforce_permissions");
if (*PPERM == 0)
return PERMISSION_RULE_ALLOW_MODE_ALLOW;
const auto LOOKUP = binaryNameForWlClient(client);
Debug::log(TRACE, "CDynamicPermissionManager::clientHasPermission: checking permission {} for client {:x} (binary {})", permissionToString(permission), (uintptr_t)client,
LOOKUP.has_value() ? LOOKUP.value() : "lookup failed: " + LOOKUP.error());
// first, check if we have the client + perm combo in our cache.
auto it = std::ranges::find_if(m_rules, [client, permission](const auto& e) { return e->m_client == client && e->m_type == permission; });
if (it == m_rules.end()) {
Debug::log(TRACE, "CDynamicPermissionManager::clientHasPermission: permission not cached, checking binary name");
if (!LOOKUP.has_value())
Debug::log(TRACE, "CDynamicPermissionManager::clientHasPermission: binary name check failed");
else {
const auto BINNAME = LOOKUP.value().contains("/") ? LOOKUP.value().substr(LOOKUP.value().find_last_of('/') + 1) : LOOKUP.value();
Debug::log(TRACE, "CDynamicPermissionManager::clientHasPermission: binary path {}, name {}", LOOKUP.value(), BINNAME);
it = std::ranges::find_if(m_rules, [clientBinaryPath = LOOKUP.value(), permission](const auto& e) {
if (e->m_type != permission)
return false; // wrong perm
if (!e->m_binaryPath.empty() && e->m_binaryPath == clientBinaryPath)
return true; // matches binary path
if (!e->m_binaryRegex)
return false; // wl_client* rule
// regex match
if (RE2::FullMatch(clientBinaryPath, *e->m_binaryRegex))
return true;
return false;
});
if (it == m_rules.end())
Debug::log(TRACE, "CDynamicPermissionManager::clientHasPermission: no rule for binary");
else {
if ((*it)->m_allowMode == PERMISSION_RULE_ALLOW_MODE_ALLOW) {
Debug::log(TRACE, "CDynamicPermissionManager::clientHasPermission: permission allowed by config rule");
return PERMISSION_RULE_ALLOW_MODE_ALLOW;
} else if ((*it)->m_allowMode == PERMISSION_RULE_ALLOW_MODE_DENY) {
Debug::log(TRACE, "CDynamicPermissionManager::clientHasPermission: permission denied by config rule");
return PERMISSION_RULE_ALLOW_MODE_DENY;
} else if ((*it)->m_allowMode == PERMISSION_RULE_ALLOW_MODE_PENDING) {
Debug::log(TRACE, "CDynamicPermissionManager::clientHasPermission: permission pending by config rule");
return PERMISSION_RULE_ALLOW_MODE_PENDING;
} else
Debug::log(TRACE, "CDynamicPermissionManager::clientHasPermission: permission ask by config rule");
}
}
} else if ((*it)->m_allowMode == PERMISSION_RULE_ALLOW_MODE_ALLOW) {
Debug::log(TRACE, "CDynamicPermissionManager::clientHasPermission: permission allowed before by user");
return PERMISSION_RULE_ALLOW_MODE_ALLOW;
} else if ((*it)->m_allowMode == PERMISSION_RULE_ALLOW_MODE_DENY) {
Debug::log(TRACE, "CDynamicPermissionManager::clientHasPermission: permission denied before by user");
return PERMISSION_RULE_ALLOW_MODE_DENY;
} else if ((*it)->m_allowMode == PERMISSION_RULE_ALLOW_MODE_PENDING) {
Debug::log(TRACE, "CDynamicPermissionManager::clientHasPermission: permission pending before by user");
return PERMISSION_RULE_ALLOW_MODE_PENDING;
}
// if we are here, we need to ask.
askForPermission(client, LOOKUP.value_or(""), permission);
return PERMISSION_RULE_ALLOW_MODE_PENDING;
}
void CDynamicPermissionManager::askForPermission(wl_client* client, const std::string& binaryPath, eDynamicPermissionType type) {
auto rule = m_rules.emplace_back(SP<CDynamicPermissionRule>(new CDynamicPermissionRule(client, type, PERMISSION_RULE_ALLOW_MODE_PENDING)));
std::string description = "";
if (binaryPath.empty())
description = std::format("An unknown application (wayland client ID 0x{:x}) is {}.", (uintptr_t)client, permissionToHumanString(type));
else {
std::string binaryName = binaryPath.contains("/") ? binaryPath.substr(binaryPath.find_last_of('/') + 1) : binaryPath;
description = std::format("An application <b>{}</b> ({}) is {}.", binaryName, binaryPath, permissionToHumanString(type));
}
description += "<br/><br/>Do you want to allow this?";
std::vector<std::string> options;
if (!binaryPath.empty()) {
description += "<br/><br/><i>Hint: you can set persistent rules for these in the Hyprland config file.</i>";
options = {"Deny", "Allow and remember app", "Allow once"};
} else
options = {"Deny", "Allow"};
rule->m_dialogBox = CAsyncDialogBox::create("Permission request", description, options);
if (!rule->m_dialogBox) {
Debug::log(ERR, "CDynamicPermissionManager::askForPermission: hyprland-qtutils likely missing, cannot ask! Disabling permission control...");
rule->m_allowMode = PERMISSION_RULE_ALLOW_MODE_ALLOW;
return;
}
rule->m_dialogBox->open([r = WP<CDynamicPermissionRule>(rule), binaryPath](std::string result) {
if (!r)
return;
Debug::log(TRACE, "CDynamicPermissionRule: user returned {}", result);
if (result.starts_with("Allow once"))
r->m_allowMode = PERMISSION_RULE_ALLOW_MODE_ALLOW;
else if (result.starts_with("Deny")) {
r->m_allowMode = PERMISSION_RULE_ALLOW_MODE_DENY;
r->m_binaryPath = binaryPath;
} else if (result.starts_with("Allow and remember")) {
r->m_allowMode = PERMISSION_RULE_ALLOW_MODE_ALLOW;
r->m_binaryPath = binaryPath;
} else if (result.starts_with("Allow"))
r->m_allowMode = PERMISSION_RULE_ALLOW_MODE_ALLOW;
});
}
void CDynamicPermissionManager::removeRulesForClient(wl_client* client) {
std::erase_if(m_rules, [client](const auto& e) { return e->m_client == client; });
}