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Diffstat (limited to 'sal/rtl/uuid.cxx')
| -rw-r--r-- | sal/rtl/uuid.cxx | 173 |
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: */ |