Add X509CertificateBytes which uses CRYPTO_BUFFER instead of macOS-native certificate types.

net/BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/buildflag_header.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
@@ skipping 19 matching lines @@
 # The way the cache uses mmap() is inefficient on some Android devices. If
 # this flag is set, we hackily avoid using mmap() in the disk cache. We are
 # pretty confident that mmap-ing the index would not hurt any existing x86
 # android devices, but we cannot be so sure about the variety of ARM devices.
 # So enable it for x86 only for now.
 posix_avoid_mmap = is_android && current_cpu != "x86"
 
 use_v8_in_net = !is_ios && !is_proto_quic
 enable_built_in_dns = !is_ios && !is_proto_quic
 
+# True if certificates are represented with DER byte buffers. This can be true
+# in addition to use_openssl_certs or use_nss_certs, in that case byte certs
+# are used internally but OpenSSL or NSS are used for certificate verification.
+# TODO(mattm): crbug.com/671420: Implement and enable this for all platforms.
+use_byte_certs = is_mac
+
 buildflag_header("features") {
   header = "net_features.h"
   flags = [
     "POSIX_AVOID_MMAP=$posix_avoid_mmap",
     "DISABLE_FILE_SUPPORT=$disable_file_support",
     "DISABLE_FTP_SUPPORT=$disable_ftp_support",
     "ENABLE_MDNS=$enable_mdns",
     "ENABLE_WEBSOCKETS=$enable_websockets",
+    "USE_BYTE_CERTS=$use_byte_certs",
   ]
 }
 
 config("net_internal_config") {
   defines = [
     "DLOPEN_KERBEROS",
     "NET_IMPLEMENTATION",
   ]
 
   if (use_kerberos) {
@@ skipping 520 matching lines @@
       "cert/test_keychain_search_list_mac.h",
       "cert/test_root_certs.cc",
       "cert/test_root_certs.h",
       "cert/test_root_certs_android.cc",
       "cert/test_root_certs_mac.cc",
       "cert/test_root_certs_nss.cc",
       "cert/test_root_certs_openssl.cc",
       "cert/test_root_certs_win.cc",
       "cert/x509_cert_types_mac.cc",
       "cert/x509_cert_types_win.cc",
+      "cert/x509_certificate_bytes.cc",
       "cert/x509_certificate_ios.cc",
       "cert/x509_certificate_known_roots_win.h",
       "cert/x509_certificate_mac.cc",
       "cert/x509_certificate_nss.cc",
       "cert/x509_certificate_win.cc",
       "cert/x509_util_android.cc",
       "cert/x509_util_android.h",
+      "cert/x509_util_ios.cc",
+      "cert/x509_util_ios.h",
       "cert/x509_util_mac.cc",
       "cert/x509_util_mac.h",
       "cert/x509_util_nss.cc",
       "cert/x509_util_nss.h",
       "cert_net/cert_net_fetcher_impl.cc",
       "cert_net/cert_net_fetcher_impl.h",
       "cert_net/nss_ocsp.cc",
       "cert_net/nss_ocsp.h",
       "cookies/canonical_cookie.cc",
       "cookies/canonical_cookie.h",
@@ skipping 1120 matching lines @@
     }
 
     if (!enable_built_in_dns) {
       sources -= [
         "dns/address_sorter_posix.cc",
         "dns/address_sorter_posix.h",
         "dns/dns_client.cc",
       ]
     }
 
+    if (use_byte_certs) {
+      if (is_ios) {
+        sources -= [ "cert/x509_certificate_ios.cc" ]
+      }
+      if (is_mac) {
+        sources -= [ "cert/x509_certificate_mac.cc" ]
+      }
+      if (use_nss_certs) {
+        sources -= [ "cert/x509_certificate_nss.cc" ]
+      }
+      if (use_openssl_certs) {
+        sources -= [ "cert/x509_certificate_openssl.cc" ]
+      }
+      if (is_win) {
+        sources -= [ "cert/x509_certificate_win.cc" ]
+      }
+    } else {
+      sources -= [ "cert/x509_certificate_bytes.cc" ]
+    }
+
     if (!use_openssl_certs) {
       sources -= [
         "cert/cert_database_openssl.cc",
         "cert/cert_verify_proc_openssl.cc",
         "cert/cert_verify_proc_openssl.h",
         "cert/test_root_certs_openssl.cc",
         "cert/x509_certificate_openssl.cc",
         "ssl/openssl_client_key_store.cc",
         "ssl/openssl_client_key_store.h",
       ]
@@ skipping 3993 matching lines @@
   ]
   deps = [
     ":net_fuzzer_test_support",
     ":test_support",
     "//base",
     "//net",
   ]
   dict = "data/fuzzer_dictionaries/net_spdy_session_fuzzer.dict"
   seed_corpus = "data/fuzzer_data/net_spdy_session_fuzzer/"
 }