src: turn key length exception into CHECK

bnoordhuis · bnoordhuis · commit 5b1484d299ea · 2017-10-29T11:52:53.000+01:00
This exception can logically never happen because of the key stretching that takes place first. Failure must therefore be a bug in Node.js and not in the executing script. PR-URL: nodejs#15183 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
diff --git a/src/node_crypto.cc b/src/node_crypto.cc
@@ -3363,10 +3363,7 @@ void CipherBase::Init(const char* cipher_type,
   if (mode == EVP_CIPH_WRAP_MODE)
     EVP_CIPHER_CTX_set_flags(&ctx_, EVP_CIPHER_CTX_FLAG_WRAP_ALLOW);
 
-  if (!EVP_CIPHER_CTX_set_key_length(&ctx_, key_len)) {
-    EVP_CIPHER_CTX_cleanup(&ctx_);
-    return env()->ThrowError("Invalid key length");
-  }
+  CHECK_EQ(1, EVP_CIPHER_CTX_set_key_length(&ctx_, key_len));
 
   EVP_CipherInit_ex(&ctx_,
                     nullptr,
