- Added a generic entropy accumulator that provides support for adding custom entropy sources and added some generic and platform dependent entropy sources
diff --git a/library/entropy_poll.c b/library/entropy_poll.c
new file mode 100644
index 0000000..270eb86
--- /dev/null
+++ b/library/entropy_poll.c
@@ -0,0 +1,135 @@
+/*
+ * Platform-specific and custom entropy polling functions
+ *
+ * Copyright (C) 2006-2011, Brainspark B.V.
+ *
+ * This file is part of PolarSSL (http://www.polarssl.org)
+ * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "polarssl/config.h"
+
+#if defined(POLARSSL_ENTROPY_C)
+
+#include "polarssl/entropy.h"
+#include "polarssl/entropy_poll.h"
+
+#if defined(POLARSSL_TIMING_C)
+#include "polarssl/timing.h"
+#endif
+#if defined(POLARSSL_HAVEGE_C)
+#include "polarssl/havege.h"
+#endif
+
+#if !defined(POLARSSL_NO_PLATFORM_ENTROPY)
+#if defined(_WIN32)
+
+#include <windows.h>
+#if !defined(_WIN32_WINNT)
+#define _WIN32_WINNT 0x0400
+#endif
+#include <wincrypt.h>
+
+int platform_entropy_poll( void *data, unsigned char *output, size_t len,
+ size_t *olen )
+{
+ HCRYPTPROV provider;
+ *olen = 0;
+
+ if( CryptAcquireContext( &provider, NULL, NULL,
+ PROV_RSA_FULL, CRYPT_VERIFYCONTEXT ) == FALSE )
+ {
+ return POLARSSL_ERR_ENTROPY_SOURCE_FAILED;
+ }
+
+ if( CryptGenRandom( provider, len, output ) == FALSE )
+ return POLARSSL_ERR_ENTROPY_SOURCE_FAILED;
+
+ CryptReleaseContext( provider, 0 );
+ *olen = len;
+
+ return( 0 );
+}
+#else
+
+#include <stdio.h>
+
+int platform_entropy_poll( void *data,
+ unsigned char *output, size_t len, size_t *olen )
+{
+ FILE *file;
+ size_t ret;
+ ((void) data);
+
+ *olen = 0;
+
+ file = fopen( "/dev/urandom", "rb" );
+ if( file == NULL )
+ return POLARSSL_ERR_ENTROPY_SOURCE_FAILED;
+
+ ret = fread( output, 1, len, file );
+ if( ret != len )
+ {
+ fclose( file );
+ return POLARSSL_ERR_ENTROPY_SOURCE_FAILED;
+ }
+
+ fclose( file );
+ *olen = len;
+
+ return( 0 );
+}
+#endif
+#endif
+
+#if defined(POLARSSL_TIMING_C)
+int hardclock_poll( void *data,
+ unsigned char *output, size_t len, size_t *olen )
+{
+ unsigned long timer = hardclock();
+ ((void) data);
+ *olen = 0;
+
+ if( len < sizeof(unsigned long) )
+ return( 0 );
+
+ memcpy( output, &timer, sizeof(unsigned long) );
+ *olen = sizeof(unsigned long);
+
+ return( 0 );
+}
+#endif
+
+#if defined(POLARSSL_HAVEGE_C)
+int havege_poll( void *data,
+ unsigned char *output, size_t len, size_t *olen )
+{
+ havege_state *hs = (havege_state *) data;
+ *olen = 0;
+
+ if( havege_random( hs, output, len ) != 0 )
+ return POLARSSL_ERR_ENTROPY_SOURCE_FAILED;
+
+ *olen = len;
+
+ return( 0 );
+}
+#endif
+
+#endif /* POLARSSL_ENTROPY_C */