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-rw-r--r--comphelper/source/xml/xmltools.cxx99
1 files changed, 99 insertions, 0 deletions
diff --git a/comphelper/source/xml/xmltools.cxx b/comphelper/source/xml/xmltools.cxx
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+++ b/comphelper/source/xml/xmltools.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * 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/.
+ */
+
+#include <comphelper/xmltools.hxx>
+#include <rtl/random.h>
+#include <tools/Guid.hxx>
+#include <vector>
+
+using namespace com::sun::star;
+
+namespace
+{
+ //Will be inside an xml comment, so can't use '-' in case '--' appears in
+ //output, etc. Despite what *is* legal in an xml comment, just using the
+ //base-64 subset to avoid pain with simplistic third-party parsers
+ const sal_uInt8 aChaffEncoder[] =
+ {
+ 'A', 'Q', 'g', 'w', 'B', 'R', 'h', 'x',
+ 'C', 'S', 'i', 'y', 'D', 'T', 'j', 'z',
+ 'E', 'U', 'k', '0', 'F', 'V', 'l', '1',
+ 'G', 'W', 'm', '2', 'H', 'X', 'n', '3',
+ 'I', 'Y', 'o', '4', 'J', 'Z', 'p', '5',
+ 'K', 'a', 'q', '6', 'L', 'b', 'r', '7',
+ 'M', 'c', 's', '8', 'N', 'd', 't', '9',
+ 'O', 'e', 'u', '+', 'P', 'f', 'v', '/',
+
+ 'A', 'Q', 'g', 'w', 'B', 'R', 'h', 'x',
+ 'C', 'S', 'i', 'y', 'D', 'T', 'j', 'z',
+ 'E', 'U', 'k', '0', 'F', 'V', 'l', '1',
+ 'G', 'W', 'm', '2', 'H', 'X', 'n', '3',
+ 'I', 'Y', 'o', '4', 'J', 'Z', 'p', '5',
+ 'K', 'a', 'q', '6', 'L', 'b', 'r', '7',
+ 'M', 'c', 's', '8', 'N', 'd', 't', '9',
+ 'O', 'e', 'u', '+', 'P', 'f', 'v', '/',
+
+ 'A', 'Q', 'g', 'w', 'B', 'R', 'h', 'x',
+ 'C', 'S', 'i', 'y', 'D', 'T', 'j', 'z',
+ 'E', 'U', 'k', '0', 'F', 'V', 'l', '1',
+ 'G', 'W', 'm', '2', 'H', 'X', 'n', '3',
+ 'I', 'Y', 'o', '4', 'J', 'Z', 'p', '5',
+ 'K', 'a', 'q', '6', 'L', 'b', 'r', '7',
+ 'M', 'c', 's', '8', 'N', 'd', 't', '9',
+ 'O', 'e', 'u', '+', 'P', 'f', 'v', '/',
+
+ 'A', 'Q', 'g', 'w', 'B', 'R', 'h', 'x',
+ 'C', 'S', 'i', 'y', 'D', 'T', 'j', 'z',
+ 'E', 'U', 'k', '0', 'F', 'V', 'l', '1',
+ 'G', 'W', 'm', '2', 'H', 'X', 'n', '3',
+ 'I', 'Y', 'o', '4', 'J', 'Z', 'p', '5',
+ 'K', 'a', 'q', '6', 'L', 'b', 'r', '7',
+ 'M', 'c', 's', '8', 'N', 'd', 't', '9',
+ 'O', 'e', 'u', '+', 'P', 'f', 'v', '/'
+ };
+
+ void encodeChaff(std::vector<sal_uInt8> &rChaff)
+ {
+ static_assert(sizeof(aChaffEncoder) == 256, "this has to cover all chars");
+
+ for (auto & elem : rChaff)
+ {
+ elem = aChaffEncoder[elem];
+ }
+ }
+}
+
+namespace comphelper::xml
+{
+ OString makeXMLChaff()
+ {
+ rtlRandomPool pool = rtl_random_createPool();
+
+ sal_Int8 n;
+ rtl_random_getBytes(pool, &n, 1);
+
+ sal_Int32 nLength = 1024+n;
+ // coverity[tainted_data] - 1024 deliberate random minus max -127/plus max 128
+ std::vector<sal_uInt8> aChaff(nLength);
+ rtl_random_getBytes(pool, aChaff.data(), nLength);
+
+ rtl_random_destroyPool(pool);
+
+ encodeChaff(aChaff);
+
+ return OString(reinterpret_cast<const char*>(aChaff.data()), nLength);
+ }
+
+ OString generateGUIDString()
+ {
+ tools::Guid aGuid(tools::Guid::Generate);
+ return aGuid.getString();
+ }
+}
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */