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+/*
+Copyright (c) 2011, Network RADIUS SARL
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+ * Neither the name of the <organization> nor the
+ names of its contributors may be used to endorse or promote products
+ derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+/*
+ * Copyright (c) 2006 Kungliga Tekniska HAÎåÎÝgskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/** \file custom.c
+ * \brief Functions which should be customized for your local system.
+ */
+
+#include "client.h"
+
+#include <unistd.h>
+#include <fcntl.h>
+
+#ifdef WIN32
+#include <wincrypt.h>
+
+volatile static HCRYPTPROV nr_cryptprovider = 0;
+
+static HCRYPTPROV
+nr_CryptProvider(void)
+{
+ BOOL rv;
+ HCRYPTPROV cryptprovider = 0;
+
+ if (nr_cryptprovider != 0)
+ return nr_cryptprovider;
+
+ rv = CryptAcquireContext(&cryptprovider, NULL,
+ MS_ENHANCED_PROV, PROV_RSA_FULL,
+ 0);
+
+ if (GetLastError() == NTE_BAD_KEYSET) {
+ if(!rv)
+ rv = CryptAcquireContext(&cryptprovider, NULL,
+ MS_ENHANCED_PROV, PROV_RSA_FULL,
+ CRYPT_NEWKEYSET);
+ }
+
+ if (rv &&
+ InterlockedCompareExchangePointer((PVOID *) &nr_cryptprovider,
+ (PVOID) cryptprovider, 0) != 0) {
+
+ CryptReleaseContext(cryptprovider, 0);
+ cryptprovider = nr_cryptprovider;
+ }
+
+ return cryptprovider;
+}
+
+ssize_t nr_rand_bytes(uint8_t *data, size_t data_len)
+{
+ if (CryptGenRandom(nr_CryptProvider(), data_len, data))
+ return 0;
+ return data_len;
+}
+#else
+ssize_t nr_rand_bytes(uint8_t *data, size_t data_len)
+{
+ static int fd = -1;
+
+ if (fd < 0) {
+ fd = open("/dev/urandom", O_RDONLY);
+ if (fd < 0) {
+ nr_strerror_printf("Error opening randomness: %s",
+ strerror(errno));
+ return 0;
+ }
+ }
+
+ return read(fd, data, data_len);
+}
+#endif /* WIN32 */
+
+uint32_t nr_rand(void)
+{
+ uint32_t lvalue;
+
+ nr_rand_bytes((void *)&lvalue, sizeof(lvalue));
+ return lvalue;
+}
+
+
+#ifndef USEC
+#define USEC (1000000)
+#endif
+
+void nr_timeval_add(struct timeval *t, unsigned int seconds, unsigned int usec)
+{
+ t->tv_sec += seconds;
+ t->tv_sec += usec / USEC;
+ t->tv_usec += usec % USEC;
+ if (t->tv_usec > USEC) {
+ t->tv_sec++;
+ t->tv_usec -= USEC;
+ }
+}
+
+int nr_timeval_cmp(const struct timeval *a, const struct timeval *b)
+{
+ if (a->tv_sec > b->tv_sec) return +1;
+ if (a->tv_sec < b->tv_sec) return -1;
+
+ if (a->tv_usec > b->tv_usec) return +1;
+ if (a->tv_usec < b->tv_usec) return -1;
+
+ return 0;
+}
+