summaryrefslogtreecommitdiffstats
path: root/sal/rtl/uuid.cxx
diff options
context:
space:
mode:
Diffstat (limited to 'sal/rtl/uuid.cxx')
-rw-r--r--sal/rtl/uuid.cxx173
1 files changed, 173 insertions, 0 deletions
diff --git a/sal/rtl/uuid.cxx b/sal/rtl/uuid.cxx
new file mode 100644
index 000000000..130be1245
--- /dev/null
+++ b/sal/rtl/uuid.cxx
@@ -0,0 +1,173 @@
+/* -*- 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/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <string.h>
+#include <stdlib.h>
+
+#include <osl/mutex.hxx>
+#include <rtl/random.h>
+#include <rtl/uuid.h>
+#include <rtl/digest.h>
+
+#define SWAP_INT32_TO_NETWORK(x)\
+ { sal_uInt32 y = x;\
+ sal_uInt8 *p = reinterpret_cast<sal_uInt8 *>(&(x)); \
+ p[0] = static_cast<sal_uInt8>( ( y >> 24 ) & 0xff );\
+ p[1] = static_cast<sal_uInt8>( ( y >> 16 ) & 0xff );\
+ p[2] = static_cast<sal_uInt8>( ( y >> 8 ) & 0xff );\
+ p[3] = static_cast<sal_uInt8>( ( y ) & 0xff);\
+ }
+#define SWAP_INT16_TO_NETWORK(x)\
+ { sal_uInt16 y = x;\
+ sal_uInt8 *p = reinterpret_cast<sal_uInt8 *>(&(x)); \
+ p[0] = static_cast<sal_uInt8>( ( y >> 8 ) & 0xff );\
+ p[1] = static_cast<sal_uInt8>( ( y ) & 0xff);\
+ }
+
+#define SWAP_NETWORK_TO_INT16(x)\
+ { sal_uInt16 y = x;\
+ sal_uInt8 *p = reinterpret_cast<sal_uInt8 *>(&(y));\
+ x = ( ( (static_cast<sal_uInt16>(p[0])) & 0xff) << 8 ) |\
+ ( ( static_cast<sal_uInt16>(p[1])) & 0xff);\
+ }
+#define SWAP_NETWORK_TO_INT32(x)\
+ { sal_uInt32 y = x;\
+ sal_uInt8 *p = reinterpret_cast<sal_uInt8 *>(&(y)); \
+ x = ( ( (static_cast<sal_uInt32>(p[0])) & 0xff) << 24 ) |\
+ ( ( (static_cast<sal_uInt32>(p[1])) & 0xff) << 16 ) |\
+ ( ( (static_cast<sal_uInt32>(p[2])) & 0xff) << 8 ) |\
+ ( ( static_cast<sal_uInt32>(p[3])) & 0xff);\
+ }
+
+namespace {
+
+struct UUID
+{
+ sal_uInt32 time_low;
+ sal_uInt16 time_mid;
+ sal_uInt16 time_hi_and_version;
+ sal_uInt8 clock_seq_hi_and_reserved;
+ sal_uInt8 clock_seq_low;
+ sal_uInt8 node[6];
+};
+
+}
+
+static void write_v3( sal_uInt8 *pUuid )
+{
+ UUID uuid;
+ // copy to avoid alignment problems
+ memcpy(&uuid, pUuid, 16);
+
+ SWAP_NETWORK_TO_INT32(uuid.time_low);
+ SWAP_NETWORK_TO_INT16(uuid.time_mid);
+ SWAP_NETWORK_TO_INT16(uuid.time_hi_and_version);
+
+ /* put in the variant and version bits */
+ uuid.time_hi_and_version &= 0x0FFF;
+ uuid.time_hi_and_version |= (3 << 12);
+ uuid.clock_seq_hi_and_reserved &= 0x3F;
+ uuid.clock_seq_hi_and_reserved |= 0x80;
+
+ SWAP_INT32_TO_NETWORK(uuid.time_low);
+ SWAP_INT16_TO_NETWORK(uuid.time_mid);
+ SWAP_INT16_TO_NETWORK(uuid.time_hi_and_version);
+
+ memcpy(pUuid, &uuid, 16);
+}
+
+extern "C" void SAL_CALL rtl_createUuid(sal_uInt8 *pTargetUUID ,
+ SAL_UNUSED_PARAMETER const sal_uInt8 *,
+ SAL_UNUSED_PARAMETER sal_Bool)
+{
+ {
+ static rtlRandomPool pool = []() {
+ rtlRandomPool aPool = rtl_random_createPool();
+ if (!aPool)
+ {
+ abort();
+ // only possible way to signal failure here (rtl_createUuid
+ // being part of a fixed C API)
+ }
+ return aPool;
+ }();
+
+ osl::MutexGuard g(osl::Mutex::getGlobalMutex());
+ if (rtl_random_getBytes(pool, pTargetUUID, 16) != rtl_Random_E_None)
+ {
+ abort();
+ // only possible way to signal failure here (rtl_createUuid
+ // being part of a fixed C API)
+ }
+ }
+ // See ITU-T Recommendation X.667:
+ pTargetUUID[6] &= 0x0F;
+ pTargetUUID[6] |= 0x40;
+ pTargetUUID[8] &= 0x3F;
+ pTargetUUID[8] |= 0x80;
+}
+
+extern "C" void SAL_CALL rtl_createNamedUuid(sal_uInt8 *pTargetUUID,
+ const sal_uInt8 *pNameSpaceUUID,
+ const rtl_String *pName )
+{
+ rtlDigest digest = rtl_digest_createMD5();
+
+ rtl_digest_updateMD5(digest, pNameSpaceUUID, 16);
+ rtl_digest_updateMD5(digest, pName->buffer, pName->length);
+
+ rtl_digest_getMD5(digest, pTargetUUID, 16);
+ rtl_digest_destroyMD5(digest);
+
+ write_v3(pTargetUUID);
+}
+
+extern "C" sal_Int32 SAL_CALL rtl_compareUuid(const sal_uInt8 *pUUID1, const sal_uInt8 *pUUID2)
+{
+ int i;
+ UUID u1;
+ UUID u2;
+ memcpy(&u1, pUUID1, 16 );
+ memcpy(&u2, pUUID2, 16 );
+
+ SWAP_NETWORK_TO_INT32(u1.time_low);
+ SWAP_NETWORK_TO_INT16(u1.time_mid);
+ SWAP_NETWORK_TO_INT16(u1.time_hi_and_version);
+
+ SWAP_NETWORK_TO_INT32(u2.time_low);
+ SWAP_NETWORK_TO_INT16(u2.time_mid);
+ SWAP_NETWORK_TO_INT16(u2.time_hi_and_version);
+
+#define CHECK(f1, f2) if (f1 != f2) return f1 < f2 ? -1 : 1;
+ CHECK(u1.time_low, u2.time_low);
+ CHECK(u1.time_mid, u2.time_mid);
+ CHECK(u1.time_hi_and_version, u2.time_hi_and_version);
+ CHECK(u1.clock_seq_hi_and_reserved, u2.clock_seq_hi_and_reserved);
+ CHECK(u1.clock_seq_low, u2.clock_seq_low);
+ for (i = 0; i < 6; i++)
+ {
+ if (u1.node[i] < u2.node[i])
+ return -1;
+ if (u1.node[i] > u2.node[i])
+ return 1;
+ }
+ return 0;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */