1 files changed, 94 insertions, 0 deletions
diff --git a/sway/security.c b/sway/security.c
new file mode 100644
index 00000000..f16fdd1f
--- /dev/null
+++ b/sway/security.c
@@ -0,0 +1,94 @@
+#include <unistd.h>
+#include <stdio.h>
+#include "sway/config.h"
+#include "sway/security.h"
+#include "log.h"
+
+struct feature_policy *alloc_feature_policy(const char *program) {
+	uint32_t default_policy = 0;
+	for (int i = 0; i < config->feature_policies->length; ++i) {
+		struct feature_policy *policy = config->feature_policies->items[i];
+		if (strcmp(policy->program, "*") == 0) {
+			default_policy = policy->features;
+			break;
+		}
+	}
+
+	struct feature_policy *policy = malloc(sizeof(struct feature_policy));
+	policy->program = strdup(program);
+	policy->features = default_policy;
+	return policy;
+}
+
+struct command_policy *alloc_command_policy(const char *command) {
+	struct command_policy *policy = malloc(sizeof(struct command_policy));
+	policy->command = strdup(command);
+	policy->context = 0;
+	return policy;
+}
+
+enum secure_feature get_feature_policy(pid_t pid) {
+	const char *fmt = "/proc/%d/exe";
+	int pathlen = snprintf(NULL, 0, fmt, pid);
+	char *path = malloc(pathlen + 1);
+	snprintf(path, pathlen + 1, fmt, pid);
+	static char link[2048];
+
+	uint32_t default_policy = 0;
+
+	ssize_t len = readlink(path, link, sizeof(link));
+	if (len < 0) {
+		sway_log(L_INFO,
+			"WARNING: unable to read %s for security check. Using default policy.",
+			path);
+		strcpy(link, "*");
+	} else {
+		link[len] = '\0';
+	}
+	free(path);
+
+	for (int i = 0; i < config->feature_policies->length; ++i) {
+		struct feature_policy *policy = config->feature_policies->items[i];
+		if (strcmp(policy->program, "*") == 0) {
+			default_policy = policy->features;
+		}
+		if (strcmp(policy->program, link) == 0) {
+			return policy->features;
+		}
+	}
+
+	return default_policy;
+}
+
+enum command_context get_command_policy(const char *cmd) {
+	uint32_t default_policy = 0;
+
+	for (int i = 0; i < config->command_policies->length; ++i) {
+		struct command_policy *policy = config->command_policies->items[i];
+		if (strcmp(policy->command, "*") == 0) {
+			default_policy = policy->context;
+		}
+		if (strcmp(policy->command, cmd) == 0) {
+			return policy->context;
+		}
+	}
+
+	return default_policy;
+}
+
+const char *command_policy_str(enum command_context context) {
+	switch (context) {
+		case CONTEXT_ALL:
+			return "all";
+		case CONTEXT_CONFIG:
+			return "config";
+		case CONTEXT_BINDING:
+			return "binding";
+		case CONTEXT_IPC:
+			return "IPC";
+		case CONTEXT_CRITERIA:
+			return "criteria";
+		default:
+			return "unknown";
+	}
+}