random number from windows csp

lib/hcrypto/rand-w32.c

@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2006 Kungliga Tekniska Högskolan
+ * (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.
+ */
+
+#include <config.h>
+
+#include <windows.h>
+#include <wincrypt.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <rand.h>
+#include <heim_threads.h>
+
+#include <roken.h>
+
+#include "randi.h"
+
+static HCRYPTPROV cryptprovider = 0; 
+
+static HCRYPTPROV
+_hc_CryptProvider(void)
+{
+    BOOL res;
+
+    if (cryptprovider != 0)
+	return cryptprovider;
+	
+    res = CryptAcquireContext(&cryptprovider, NULL,
+			      MS_ENHANCED_PROV, PROV_RSA_FULL,
+			      0);
+    if(!res)
+        CryptAcquireContext(&cryptprovider, NULL,
+			    MS_ENHANCED_PROV, PROV_RSA_FULL,
+			    CRYPT_NEWKEYSET);
+    return cryptprovider;
+}
+
+/*
+ *
+ */
+
+
+static void
+w32crypto_seed(const void *indata, int size)
+{
+}
+
+
+static int
+w32crypto_bytes(unsigned char *outdata, int size)
+{
+    if (CryptGenRandom(_hc_CryptProvider(), size, outdata) == 0)
+	return 0;
+    return 1;
+}
+
+static void
+w32crypto_cleanup(void)
+{
+}
+
+static void
+w32crypto_add(const void *indata, int size, double entropi)
+{
+}
+
+static int
+w32crypto_pseudorand(unsigned char *outdata, int size)
+{
+}
+
+static int
+w32crypto_status(void)
+{
+    if (_hc_CryptProvider() == NULL)
+	return 0;
+    return 1;
+}
+
+const RAND_METHOD hc_rand_w32crypto_method = {
+    w32crypto_seed,
+    w32crypto_bytes,
+    w32crypto_cleanup,
+    w32crypto_add,
+    w32crypto_pseudorand,
+    w32crypto_status
+};
+
+const RAND_METHOD *
+RAND_w32crypto_method(void)
+{
+    return &hc_rand_w32crypto_method;
+}

lib/hcrypto/rand.c

@@ -60,7 +60,9 @@ init_method(void)
 {
     if (selected_meth != NULL)
 	return;
-#ifdef __APPLE__
+#if defined(_WIN32)
+    selected_meth = &hc_rand_w32crypto_method;
+#elif defined(__APPLE__)
     selected_meth = &hc_rand_unix_method;
 #else
     selected_meth = &hc_rand_fortuna_method;

lib/hcrypto/randi.h

@@ -42,6 +42,7 @@ extern const RAND_METHOD hc_rand_fortuna_method;
 extern const RAND_METHOD hc_rand_unix_method;
 extern const RAND_METHOD hc_rand_egd_method;
 extern const RAND_METHOD hc_rand_timer_method;
+extern const RAND_METHOD hc_rand_w32crypto_method;
 
 const RAND_METHOD * RAND_timer_method(void);