Add Apple RNG

src/rand_apple.c

@@ -0,0 +1,31 @@
+/*
+ *  Copyright 2014-2022 The GmSSL Project. All Rights Reserved.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the License); you may
+ *  not use this file except in compliance with the License.
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <gmssl/rand.h>
+#include <gmssl/error.h>
+#include <Security/Security.h> // clang -framework Security
+
+
+int rand_bytes(uint8_t *buf, size_t len)
+{
+	int errCode;
+	if ((errCode = SecRandomCopyBytes(kSecRandomDefault, len, buf)) != errSecSuccess) {
+		//CFStringRef errStr;
+		//errStr = SecCopyErrorMessageString(errCode, NULL);
+		//CFRelease(errStr);
+		error_print();
+		return -1;
+	}
+	return 1;
+}
+