Refactor project structure

core/anslicensing/rand.cpp

@@ -0,0 +1,66 @@
+#include "precomp.h"
+
+#include "bigint.h"
+#include "rand.h"
+
+#ifdef _WIN32
+#include <windows.h>
+#include <wincrypt.h>
+#endif
+
+#include <stdlib.h>
+
+random::random()
+{
+#ifdef _WIN32
+   	if ( !CryptAcquireContext( (HCRYPTPROV *)&m_hCryptProv, NULL, MS_DEF_PROV, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT ) )
+		m_hCryptProv = NULL;
+#else
+	::srand(time(NULL));
+#endif
+}
+
+random::~random()
+{
+#ifdef  _WIN32
+	if ( m_hCryptProv )
+		CryptReleaseContext( (HCRYPTPROV)m_hCryptProv, 0L );
+#endif
+}
+
+unsigned random::rand( unsigned max )
+{
+	unsigned rnd;
+
+#ifdef _WIN32
+	if ( m_hCryptProv )
+		CryptGenRandom( (HCRYPTPROV)m_hCryptProv, sizeof( unsigned ), (BYTE *)&rnd );
+#else
+	rnd = ::rand();
+#endif
+
+	return rnd % max;
+}
+
+bigint random::rand( bigint & max )
+{
+	unsigned n = ( max.bits() + ( ( sizeof( unsigned ) << 3 ) - 1 ) ) / ( sizeof( unsigned ) << 3 );
+	unsigned * buf = (unsigned*)malloc(n * sizeof(unsigned));
+	if ( !buf ) return max - 1;
+
+	bigint rnd;
+
+#ifdef _WIN32
+	if ( m_hCryptProv )
+		CryptGenRandom( (HCRYPTPROV)m_hCryptProv, n * sizeof( unsigned ), (BYTE *)buf );
+#else
+	for (unsigned i = 0; i < n; i++)
+		*((unsigned *)buf + i) = ::rand();
+#endif
+
+	rnd.load( buf, n );
+
+	free(buf);
+
+	return rnd % max;
+}