Make sure we use the libctx when creating an EVP_PKEY_CTX in libssl

We should use EVP_PKEY_CTX_new_from_pkey() to ensure we use the correct
libctx.

Reviewed-by: Ben Kaduk <kaduk@mit.edu>
(Merged from https://github.com/openssl/openssl/pull/11401)

diff --git a/ssl/s3_lib.c b/ssl/s3_lib.c
index 9060ee38f0cefac6c26047715beb21f6cd5bcea8..5373fafc3607f8df482c5c8a4a165b87e62f5abf 100644 (file)
--- a/ssl/s3_lib.c
+++ b/ssl/s3_lib.c
@@ -4728,19 +4728,33 @@ EVP_PKEY *ssl_generate_pkey_group(SSL *s, uint16_t id)
      */
 # ifndef OPENSSL_NO_DH
     if (gtype == TLS_GROUP_FFDHE)
+#  if 0
+        pctx = EVP_PKEY_CTX_new_from_name(s->ctx->libctx, "DH", s->ctx->propq);
+#  else
         pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_DH, NULL);
+#  endif
 #  ifndef OPENSSL_NO_EC
     else
-#  endif
-# endif
+#  endif /* OPENSSL_NO_EC */
+# endif /* OPENSSL_NO_DH */
 # ifndef OPENSSL_NO_EC
     {
+        /*
+         * TODO(3.0): When provider based EC key gen is present we can enable
+         * this code.
+         */
         if (gtype == TLS_GROUP_CURVE_CUSTOM)
             pctx = EVP_PKEY_CTX_new_id(ginf->nid, NULL);
         else
+#  if 0
+            pctx = EVP_PKEY_CTX_new_from_name(s->ctx->libctx, "EC",
+                                              s->ctx->propq);
+#  else
             pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL);
+#  endif
+
     }
-# endif
+# endif /* OPENSSL_NO_EC */
     if (pctx == NULL) {
         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_GENERATE_PKEY_GROUP,
                  ERR_R_MALLOC_FAILURE);
@@ -4806,7 +4820,11 @@ EVP_PKEY *ssl_generate_param_group(SSL *s, uint16_t id)
     EVP_PKEY_CTX *pctx = NULL;
     EVP_PKEY *pkey = NULL;
     const TLS_GROUP_INFO *ginf = tls1_group_id_lookup(id);
+#if 0
+    const char *pkey_ctx_name;
+#else
     int pkey_ctx_id;
+#endif
 
     if (ginf == NULL)
         goto err;
@@ -4824,9 +4842,16 @@ EVP_PKEY *ssl_generate_param_group(SSL *s, uint16_t id)
      * s->ctx->libctx and s->ctx->propq when paramgen has been updated to be
      * provider aware.
      */
+#if 0
+    pkey_ctx_name = (ginf->flags & TLS_GROUP_FFDHE) != 0 ? "DH" : "EC";
+    pctx = EVP_PKEY_CTX_new_from_name(s->ctx->libctx, pkey_ctx_name,
+                                      s->ctx->propq);
+#else
     pkey_ctx_id = (ginf->flags & TLS_GROUP_FFDHE)
                         ? EVP_PKEY_DH : EVP_PKEY_EC;
     pctx = EVP_PKEY_CTX_new_id(pkey_ctx_id, NULL);
+#endif
+
     if (pctx == NULL)
         goto err;
     if (EVP_PKEY_paramgen_init(pctx) <= 0)