From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shelley Vohr <shelley.vohr@gmail.com>
Date: Wed, 12 Feb 2020 15:08:04 -0800
Subject: fix: use crypto impls for compat

BoringSSL does not export DSA_get0_q, ECDSA_SIG_get0_r, or ECDSA_SIG_get0_s. This
patch works around that problem by using the implementations of those functions as
found in the OpenSSL repo. I plan to upstream a version of this.

diff --git a/src/node_crypto.cc b/src/node_crypto.cc
index 41b72d010824234c567586524d22cae6ac849edb..b2403821bb3cab4aa4587fcb757eeb101c8a7e03 100644
--- a/src/node_crypto.cc
+++ b/src/node_crypto.cc
@@ -5027,7 +5027,7 @@ static unsigned int GetBytesOfRS(const ManagedEVPPKey& pkey) {
   if (base_id == EVP_PKEY_DSA) {
     DSA* dsa_key = EVP_PKEY_get0_DSA(pkey.get());
     // Both r and s are computed mod q, so their width is limited by that of q.
-    bits = BN_num_bits(DSA_get0_q(dsa_key));
+    bits = BN_num_bits(dsa_key->q);
   } else if (base_id == EVP_PKEY_EC) {
     EC_KEY* ec_key = EVP_PKEY_get0_EC_KEY(pkey.get());
     const EC_GROUP* ec_group = EC_KEY_get0_group(ec_key);
@@ -5056,8 +5056,8 @@ static AllocatedBuffer ConvertSignatureToP1363(Environment* env,
   AllocatedBuffer buf = env->AllocateManaged(2 * n);
   unsigned char* data = reinterpret_cast<unsigned char*>(buf.data());
 
-  const BIGNUM* r = ECDSA_SIG_get0_r(asn1_sig.get());
-  const BIGNUM* s = ECDSA_SIG_get0_s(asn1_sig.get());
+  const BIGNUM* r = asn1_sig.get()->r;
+  const BIGNUM* s = asn1_sig.get()->s;
   CHECK_EQ(n, static_cast<unsigned int>(BN_bn2binpad(r, data, n)));
   CHECK_EQ(n, static_cast<unsigned int>(BN_bn2binpad(s, data + n, n)));