add crypto web api

Author: karlseguin

src/browser/crypto/crypto.zig

@@ -0,0 +1,82 @@
+// Copyright (C) 2023-2024  Lightpanda (Selecy SAS)
+//
+// Francis Bouvier <[email protected]>
+// Pierre Tachoire <[email protected]>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+const std = @import("std");
+const uuidv4 = @import("../../id.zig").uuidv4;
+
+// https://w3c.github.io/webcrypto/#crypto-interface
+pub const Crypto = struct {
+    pub fn _getRandomValues(_: *const Crypto, into: RandomValues) !void {
+        const buf = into.asBuffer();
+        if (buf.len > 65_536) {
+            return error.QuotaExceededError;
+        }
+        std.crypto.random.bytes(buf);
+    }
+
+    pub fn _randomUUID(_: *const Crypto) [36]u8 {
+        var hex: [36]u8 = undefined;
+        uuidv4(&hex);
+        return hex;
+    }
+};
+
+const RandomValues = union(enum) {
+    int8: []i8,
+    uint8: []u8,
+    int16: []i16,
+    uint16: []u16,
+    int32: []i32,
+    uint32: []u32,
+    int64: []i64,
+    uint64: []u64,
+
+    fn asBuffer(self: RandomValues) []u8 {
+        switch (self) {
+            .int8 => |b| return (@as([]u8, @ptrCast(b)))[0..b.len],
+            .uint8 => |b| return (@as([]u8, @ptrCast(b)))[0..b.len],
+            .int16 => |b| return (@as([]u8, @ptrCast(b)))[0 .. b.len * 2],
+            .uint16 => |b| return (@as([]u8, @ptrCast(b)))[0 .. b.len * 2],
+            .int32 => |b| return (@as([]u8, @ptrCast(b)))[0 .. b.len * 4],
+            .uint32 => |b| return (@as([]u8, @ptrCast(b)))[0 .. b.len * 4],
+            .int64 => |b| return (@as([]u8, @ptrCast(b)))[0 .. b.len * 8],
+            .uint64 => |b| return (@as([]u8, @ptrCast(b)))[0 .. b.len * 8],
+        }
+    }
+};
+
+const testing = @import("../../testing.zig");
+test "Browser.Crypto" {
+    var runner = try testing.jsRunner(testing.tracking_allocator, .{});
+    defer runner.deinit();
+
+    try runner.testCases(&.{
+        .{ "const a = crypto.randomUUID();", "undefined" },
+        .{ "const b = crypto.randomUUID();", "undefined" },
+        .{ "a.length;", "36" },
+        .{ "a.length;", "36" },
+        .{ "a == b;", "false" },
+    }, .{});
+
+    try runner.testCases(&.{
+        .{ "try { crypto.getRandomValues(new BigUint64Array(8193)) } catch(e) { e.message == 'QuotaExceededError' }", "true" },
+        .{ "let r1 = new Int32Array(5)", "undefined" },
+        .{ "crypto.getRandomValues(r1)", "undefined" },
+        .{ "new Set(r1).size", "5" },
+    }, .{});
+}

src/browser/env.zig

@@ -10,6 +10,7 @@ const HttpClient = @import("../http/client.zig").Client;
 const Renderer = @import("browser.zig").Renderer;
 
 const Interfaces = generate.Tuple(.{
+    @import("crypto/crypto.zig").Crypto,
     @import("console/console.zig").Console,
     @import("dom/dom.zig").Interfaces,
     @import("events/event.zig").Interfaces,

src/browser/html/window.zig

@@ -25,6 +25,7 @@ const SessionState = @import("../env.zig").SessionState;
 const Navigator = @import("navigator.zig").Navigator;
 const History = @import("history.zig").History;
 const Location = @import("location.zig").Location;
+const Crypto = @import("../crypto/crypto.zig").Crypto;
 const Console = @import("../console/console.zig").Console;
 const EventTarget = @import("../dom/event_target.zig").EventTarget;
 
@@ -49,6 +50,7 @@ pub const Window = struct {
     timeoutid: u32 = 0,
     timeoutids: [512]u64 = undefined,
 
+    crypto: Crypto = .{},
     console: Console = .{},
     navigator: Navigator = .{},
 
@@ -91,6 +93,10 @@ pub const Window = struct {
         return &self.console;
     }
 
+    pub fn get_crypto(self: *Window) *Crypto {
+        return &self.crypto;
+    }
+
     pub fn get_self(self: *Window) *Window {
         return self;
     }

src/runtime/js.zig

@@ -2532,9 +2532,14 @@ fn Caller(comptime E: type) type {
 
                         // We settle for just probing the first value. Ok, actually
                         // not tricky in this case either.
-                        const context = self.contxt;
+                        const context = self.context;
                         const js_obj = js_arr.castTo(v8.Object);
-                        return self.probeJsValueToZig(named_function, ptr.child, try js_obj.getAtIndex(context, 0));
+                        switch (try self.probeJsValueToZig(named_function, ptr.child, try js_obj.getAtIndex(context, 0))) {
+                            .value, .ok => return .{ .ok = {} },
+                            .compatible => return .{ .compatible = {} },
+                            .coerce => return .{ .coerce = {} },
+                            .invalid => return .{ .invalid = {} },
+                        }
                     },
                     else => {},
                 },