chore: checkpoint before Python removal

vendor/aws-lc-sys/aws-lc/crypto/rand_extra/ccrandomgeneratebytes.c

@@ -0,0 +1,29 @@
+// Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0 OR ISC
+
+#include <openssl/rand.h>
+
+#include "internal.h"
+
+#if defined(OPENSSL_RAND_CCRANDOMGENERATEBYTES)
+
+#include <CommonCrypto/CommonRandom.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+void CRYPTO_sysrand(uint8_t *out, size_t requested) {
+
+  if (requested == 0) {
+    return;
+  }
+
+  // To get system randomness on iOS we use |CCRandomGenerateBytes|. On MacOS we
+  // use |getentropy| but iOS doesn't expose that.
+  if (CCRandomGenerateBytes(out, requested) != kCCSuccess) {
+    fprintf(stderr, "CCRandomGenerateBytes failed.\n");
+    abort();
+  }
+}
+
+#endif