Commit 461a554

@@ -0,0 +1,51 @@
+// TODO:
+//  - [ ] xPrint
+//  - [ ] generate key at comp time
+
+const std = @import("std");
+const key: []const u8 = "ABCDEFG";
+
+// Protected String Namespace
+pub const PS = struct {
+    pub fn xAlloc(comptime str: []const u8, allocator: std.mem.Allocator) ![]const u8 {
+        const memory = try allocator.alloc(u8, str.len);
+        return xBuf(str, memory);
+    }
+
+    pub fn x(comptime str: []const u8) []const u8 {
+        comptime {
+            var buf: [str.len:0]u8 = undefined;
+            return xBuf(str, buf[0..]);
+        }
+    }
+
+    fn xBuf(comptime str: []const u8, buf: []u8) []const u8 {
+        for (str) |_, i| {
+            buf[i] = str[i] ^ key[i % key.len];
+        }
+        return buf;
+    }
+};
+
+test "protect string" {
+    const a = "flag{XoRf0rTh3W1n!!}";
+    const b = comptime PS.x("flag{XoRf0rTh3W1n!!}");
+    const res = try PS.xAlloc(b, std.testing.allocator);
+    defer std.testing.allocator.free(res);
+    try std.testing.expectEqualStrings(a, res);
+}
+
+const print = @import("std").debug.print;
+pub fn main() !void {
+    var buffer: [2048]u8 = undefined;
+    var fba = std.heap.FixedBufferAllocator.init(&buffer);
+    const allocator = fba.allocator();
+
+    const a = "flag{boocleartext}";
+    const b = comptime PS.x("flag{XoRf0rTh3W1n!!}");
+    const flag = try PS.xAlloc(b, allocator);
+    defer allocator.free(flag);
+
+    print("a: {s}\n", .{a});
+    print("b: {s}\n", .{flag});
+}