Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 191 insertions, 0 deletions

diff --git a/netwerk/dns/nsIDNService.h b/netwerk/dns/nsIDNService.h
new file mode 100644
index 0000000000..1e90191326
--- /dev/null
+++ b/netwerk/dns/nsIDNService.h
@@ -0,0 +1,191 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsIDNService_h__
+#define nsIDNService_h__
+
+#include "nsIIDNService.h"
+#include "nsCOMPtr.h"
+
+#include "mozilla/RWLock.h"
+#include "mozilla/intl/UnicodeScriptCodes.h"
+#include "mozilla/net/IDNBlocklistUtils.h"
+#include "mozilla/intl/IDNA.h"
+#include "mozilla/UniquePtr.h"
+
+#include "nsString.h"
+
+class nsIPrefBranch;
+
+//-----------------------------------------------------------------------------
+// nsIDNService
+//-----------------------------------------------------------------------------
+
+namespace mozilla::net {
+enum ScriptCombo : int32_t;
+}
+
+class nsIDNService final : public nsIIDNService {
+ public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSIIDNSERVICE
+
+  nsIDNService();
+
+  nsresult Init();
+
+ protected:
+  virtual ~nsIDNService();
+
+ private:
+  enum stringPrepFlag {
+    eStringPrepForDNS,
+    eStringPrepForUI,
+    eStringPrepIgnoreErrors
+  };
+
+  /**
+   * Convert the following characters that must be recognized as label
+   *  separators per RFC 3490 to ASCII full stop characters
+   *
+   * U+3002 (ideographic full stop)
+   * U+FF0E (fullwidth full stop)
+   * U+FF61 (halfwidth ideographic full stop)
+   */
+  void normalizeFullStops(nsAString& s);
+
+  /**
+   * Convert and encode a DNS label in ACE/punycode.
+   * @param flag
+   *        if eStringPrepIgnoreErrors, all non-ASCII labels are
+   *           converted to punycode.
+   *        if eStringPrepForUI, only labels that are considered safe
+   *           for display are converted.
+   *           @see isLabelSafe
+   *        if eStringPrepForDNS and stringPrep finds an illegal
+   *           character, returns NS_FAILURE and out is empty
+   */
+  nsresult stringPrepAndACE(const nsAString& in, nsACString& out,
+                            stringPrepFlag flag);
+
+  /**
+   * Convert a DNS label using the stringprep profile defined in RFC 3454
+   */
+  nsresult stringPrep(const nsAString& in, nsAString& out, stringPrepFlag flag);
+
+  /**
+   * Decode an ACE-encoded DNS label to UTF-8
+   *
+   * @param flag
+   *        if eStringPrepForUI and the label is not considered safe to
+   *           display, the output is the same as the input
+   *        @see isLabelSafe
+   */
+  nsresult decodeACE(const nsACString& in, nsACString& out,
+                     stringPrepFlag flag);
+
+  /**
+   * Convert complete domain names between UTF8 and ACE and vice versa
+   *
+   * @param flag is passed to decodeACE or stringPrepAndACE for each
+   *  label individually, so the output may contain some labels in
+   *  punycode and some in UTF-8
+   */
+  nsresult UTF8toACE(const nsACString& input, nsACString& ace,
+                     stringPrepFlag flag);
+  nsresult ACEtoUTF8(const nsACString& input, nsACString& _retval,
+                     stringPrepFlag flag);
+
+  void prefsChanged(const char* pref);
+
+  static void PrefChanged(const char* aPref, void* aSelf) {
+    auto* self = static_cast<nsIDNService*>(aSelf);
+    self->prefsChanged(aPref);
+  }
+
+  /**
+   * Determine whether a label is considered safe to display to the user
+   * according to the algorithm defined in UTR 39 and the profile
+   * selected in mRestrictionProfile.
+   *
+   * For the ASCII-only profile, returns false for all labels containing
+   * non-ASCII characters.
+   *
+   * For the other profiles, returns false for labels containing any of
+   * the following:
+   *
+   *  Characters in scripts other than the "recommended scripts" and
+   *   "aspirational scripts" defined in
+   *   http://www.unicode.org/reports/tr31/#Table_Recommended_Scripts
+   *   and http://www.unicode.org/reports/tr31/#Aspirational_Use_Scripts
+   *  This includes codepoints that are not defined as Unicode
+   *   characters
+   *
+   *  Illegal combinations of scripts (@see illegalScriptCombo)
+   *
+   *  Numbers from more than one different numbering system
+   *
+   *  Sequences of the same non-spacing mark
+   *
+   *  Both simplified-only and traditional-only Chinese characters
+   *   XXX this test was disabled by bug 857481
+   */
+  bool isLabelSafe(const nsAString& label) MOZ_EXCLUDES(mLock);
+
+  /**
+   * Determine whether a combination of scripts in a single label is
+   * permitted according to the algorithm defined in UTR 39 and the
+   * profile selected in mRestrictionProfile.
+   *
+   * For the "Highly restrictive" profile, all characters in each
+   * identifier must be from a single script, or from the combinations:
+   *  Latin + Han + Hiragana + Katakana;
+   *  Latin + Han + Bopomofo; or
+   *  Latin + Han + Hangul
+   *
+   * For the "Moderately restrictive" profile, Latin is also allowed
+   *  with other scripts except Cyrillic and Greek
+   */
+  bool illegalScriptCombo(mozilla::intl::Script script,
+                          mozilla::net::ScriptCombo& savedScript)
+      MOZ_REQUIRES_SHARED(mLock);
+
+  /**
+   * Convert a DNS label from ASCII to Unicode using IDNA2008
+   */
+  nsresult IDNA2008ToUnicode(const nsACString& input, nsAString& output);
+
+  /**
+   * Convert a DNS label to a normalized form conforming to IDNA2008
+   */
+  nsresult IDNA2008StringPrep(const nsAString& input, nsAString& output,
+                              stringPrepFlag flag);
+
+  // never mutated after initializing.
+  mozilla::UniquePtr<mozilla::intl::IDNA> mIDNA;
+
+  // We use this rwlock to guard access to:
+  // |mIDNBlocklist|, |mRestrictionProfile|
+  mozilla::RWLock mLock{"nsIDNService"};
+
+  // guarded by mLock
+  nsTArray<mozilla::net::BlocklistRange> mIDNBlocklist MOZ_GUARDED_BY(mLock);
+
+  /**
+   * Restriction-level Detection profiles defined in UTR 39
+   * http://www.unicode.org/reports/tr39/#Restriction_Level_Detection,
+   * and selected by the pref network.IDN.restriction_profile
+   */
+  enum restrictionProfile {
+    eASCIIOnlyProfile,
+    eHighlyRestrictiveProfile,
+    eModeratelyRestrictiveProfile
+  };
+  // guarded by mLock;
+  restrictionProfile mRestrictionProfile MOZ_GUARDED_BY(mLock){
+      eASCIIOnlyProfile};
+};
+
+#endif  // nsIDNService_h__