69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
/* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "fspr.h"
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#include "fspr_private.h"
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#include "fspr_general.h"
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#include "fspr_portable.h"
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#include "fspr_arch_misc.h"
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#include <wincrypt.h>
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APR_DECLARE(fspr_status_t) fspr_generate_random_bytes(unsigned char * buf,
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fspr_size_t length)
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{
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HCRYPTPROV hProv;
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fspr_status_t res = APR_SUCCESS;
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/* 0x40 bit = CRYPT_SILENT, only introduced in more recent PSDKs
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* and will only work for Win2K and later.
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*/
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DWORD flags = CRYPT_VERIFYCONTEXT
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| ((fspr_os_level >= APR_WIN_2000) ? 0x40 : 0);
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if (!CryptAcquireContext(&hProv, NULL, NULL, PROV_RSA_FULL, flags)) {
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return fspr_get_os_error();
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}
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/* XXX: An ugly hack for Win64, randomness is such that noone should
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* ever expect > 2^31 bytes of data at once without the prng
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* coming to a complete halt.
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*/
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if (!CryptGenRandom(hProv, (DWORD)length, buf)) {
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res = fspr_get_os_error();
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}
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CryptReleaseContext(hProv, 0);
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return res;
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}
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APR_DECLARE(fspr_status_t) fspr_os_uuid_get(unsigned char *uuid_data)
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{
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/* Note: this call doesn't actually require CoInitialize() first
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*
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* XXX: we should scramble the bytes or some such to eliminate the
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* possible misuse/abuse since uuid is based on the NIC address, and
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* is therefore not only a uniqifier, but an identity (which might not
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* be appropriate in all cases.
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*
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* Note that Win2000, XP and later no longer suffer from this problem,
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* a scrambling fix is only needed for (fspr_os_level < APR_WIN_2000)
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*/
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if (FAILED(UuidCreate((UUID *)uuid_data))) {
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return APR_EGENERAL;
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}
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return APR_SUCCESS;
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}
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