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/* 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "apr.h"
#include "apr_private.h"
#include "apr_general.h"
#include "apr_portable.h"
#include "apr_arch_misc.h"
#include <wincrypt.h>
APR_DECLARE(apr_status_t) apr_generate_random_bytes(unsigned char * buf,
apr_size_t length)
{
HCRYPTPROV hProv;
apr_status_t res = APR_SUCCESS;
/* 0x40 bit = CRYPT_SILENT, only introduced in more recent PSDKs
* and will only work for Win2K and later.
*/
DWORD flags = CRYPT_VERIFYCONTEXT
| ((apr_os_level >= APR_WIN_2000) ? 0x40 : 0);
if (!CryptAcquireContext(&hProv, NULL, NULL, PROV_RSA_FULL, flags)) {
return apr_get_os_error();
}
/* XXX: An ugly hack for Win64, randomness is such that noone should
* ever expect > 2^31 bytes of data at once without the prng
* coming to a complete halt.
*/
if (!CryptGenRandom(hProv, (DWORD)length, buf)) {
res = apr_get_os_error();
}
CryptReleaseContext(hProv, 0);
return res;
}
APR_DECLARE(apr_status_t) apr_os_uuid_get(unsigned char *uuid_data)
{
/* Note: this call doesn't actually require CoInitialize() first
*
* XXX: we should scramble the bytes or some such to eliminate the
* possible misuse/abuse since uuid is based on the NIC address, and
* is therefore not only a uniqifier, but an identity (which might not
* be appropriate in all cases.
*
* Note that Win2000, XP and later no longer suffer from this problem,
* a scrambling fix is only needed for (apr_os_level < APR_WIN_2000)
*/
if (FAILED(UuidCreate((UUID *)uuid_data))) {
return APR_EGENERAL;
}
return APR_SUCCESS;
}
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