1 files changed, 150 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/hcrypto/rand-w32.c b/third_party/heimdal/lib/hcrypto/rand-w32.c
new file mode 100644
index 0000000..d7d91a3
--- /dev/null
+++ b/third_party/heimdal/lib/hcrypto/rand-w32.c
@@ -0,0 +1,150 @@
+/*
+ * 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 <roken.h>
+
+#include <wincrypt.h>
+
+#include <rand.h>
+#include <heim_threads.h>
+
+#include "randi.h"
+
+volatile static HCRYPTPROV g_cryptprovider;
+
+static HCRYPTPROV
+_hc_CryptProvider(void)
+{
+    BOOL rv;
+    HCRYPTPROV cryptprovider = (HCRYPTPROV)0;
+
+    if (g_cryptprovider)
+	goto out;
+
+    rv = CryptAcquireContext(&cryptprovider, NULL,
+			      MS_ENHANCED_PROV, PROV_RSA_FULL,
+			      CRYPT_VERIFYCONTEXT);
+
+    if (GetLastError() == NTE_BAD_KEYSET) {
+        rv = CryptAcquireContext(&cryptprovider, NULL,
+                                 MS_ENHANCED_PROV, PROV_RSA_FULL,
+                                 CRYPT_NEWKEYSET);
+    }
+
+    if (rv) {
+        /* try the default provider */
+        rv = CryptAcquireContext(&cryptprovider, NULL, 0, PROV_RSA_FULL,
+                                 CRYPT_VERIFYCONTEXT);
+
+        if (GetLastError() == NTE_BAD_KEYSET) {
+            rv = CryptAcquireContext(&cryptprovider, NULL,
+                                     MS_ENHANCED_PROV, PROV_RSA_FULL,
+                                     CRYPT_NEWKEYSET);
+        }
+    }
+
+    if (rv) {
+        /* try just a default random number generator */
+        rv = CryptAcquireContext(&cryptprovider, NULL, 0, PROV_RNG,
+                                 CRYPT_VERIFYCONTEXT);
+    }
+
+    if (rv == 0 &&
+        InterlockedCompareExchangePointer((PVOID *) &g_cryptprovider,
+					  (PVOID) cryptprovider, NULL) != 0) {
+
+        CryptReleaseContext(cryptprovider, 0);
+    }
+
+out:
+    return g_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))
+	return 1;
+    return 0;
+}
+
+static void
+w32crypto_cleanup(void)
+{
+    HCRYPTPROV cryptprovider;
+
+    if (InterlockedCompareExchangePointer((PVOID *) &cryptprovider,
+					  0, (PVOID) g_cryptprovider) == 0) {
+        CryptReleaseContext(cryptprovider, 0);
+    }
+}
+
+static void
+w32crypto_add(const void *indata, int size, double entropi)
+{
+}
+
+static int
+w32crypto_status(void)
+{
+    if (_hc_CryptProvider() == 0)
+	return 0;
+    return 1;
+}
+
+const RAND_METHOD hc_rand_w32crypto_method = {
+    w32crypto_seed,
+    w32crypto_bytes,
+    w32crypto_cleanup,
+    w32crypto_add,
+    w32crypto_bytes,
+    w32crypto_status
+};
+
+const RAND_METHOD *
+RAND_w32crypto_method(void)
+{
+    return &hc_rand_w32crypto_method;
+}