Private API for extensions like ssh-client that need access to TCP.

crypto/symmetric_key_openssl.cc

Index: crypto/symmetric_key_openssl.cc
diff --git a/crypto/symmetric_key_openssl.cc b/crypto/symmetric_key_openssl.cc
index 1d1ad2376de502e7251c40d44c03342114a7bf69..0ece7365f427b5cfa8f3cfd04bba21506f297993 100644
--- a/crypto/symmetric_key_openssl.cc
+++ b/crypto/symmetric_key_openssl.cc
@@ -21,6 +21,16 @@ SymmetricKey::~SymmetricKey() {
 }
 
 // static
+bool SymmetricKey::GenerateRandomBytes(size_t num_bytes, uint8* out) {
+  if (num_bytes == 0)
+    return true;
+  if (out == NULL)
+    return false;
+  OpenSSLErrStackTracer err_tracer(FROM_HERE);
+  return RAND_bytes(out, num_bytes) == 1;
+}
+
+// static
 SymmetricKey* SymmetricKey::GenerateRandomKey(Algorithm algorithm,
                                               size_t key_size_in_bits) {
   DCHECK_EQ(AES, algorithm);
@@ -29,14 +39,14 @@ SymmetricKey* SymmetricKey::GenerateRandomKey(Algorithm algorithm,
 
   if (key_size_in_bits == 0)
     return NULL;
-
-  OpenSSLErrStackTracer err_tracer(FROM_HERE);
   scoped_ptr<SymmetricKey> key(new SymmetricKey);
-  uint8* key_data =
-      reinterpret_cast<uint8*>(WriteInto(&key->key_, key_size_in_bytes + 1));
-
-  int rv = RAND_bytes(key_data, key_size_in_bytes);
-  return rv == 1 ? key.release() : NULL;
+  if (GenerateRandomBytes(
+      key_size_in_bytes,
+      reinterpret_cast<uint8*>(WriteInto(&key->key_, key_size_in_bytes + 1)))) {
+    return key.release();
+  } else {
+    return NULL;
+  }
 }
 
 // static