Add SSL support to the GN build

crypto/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/config/crypto.gni")
 
-crypto_minimal_sources = [
-  "hmac.cc",
-  "hmac.h",
-  "hmac_win.cc",
-  "secure_util.cc",
-  "secure_util.h",
-  "symmetric_key.h",
-  "symmetric_key_win.cc",
-  "third_party/nss/chromium-sha256.h",
-  "third_party/nss/sha512.cc",
-]
-
 component("crypto") {
   output_name = "crcrypto"  # Avoid colliding with OpenSSL's libcrypto.
   sources = [
     "apple_keychain.h",
     "apple_keychain_ios.mm",
     "apple_keychain_mac.mm",
     "capi_util.cc",
     "capi_util.h",
     "crypto_export.h",
     "crypto_module_blocking_password_delegate.h",
@@ skipping 62 matching lines @@
     "symmetric_key_openssl.cc",
     "third_party/nss/chromium-blapi.h",
     "third_party/nss/chromium-blapit.h",
     "third_party/nss/chromium-nss.h",
     "third_party/nss/pk11akey.cc",
     "third_party/nss/rsawrapr.c",
     "third_party/nss/secsign.cc",
   ]
 
   deps = [
+    ":crypto_minimal",
+    ":platform",
     "//base",
     "//base/third_party/dynamic_annotations",
-    "//crypto/ssl:metassl",
   ]
-  forward_dependent_configs_from = [ "//crypto/ssl:metassl" ]
 
   if (!is_mac && !is_ios) {
     sources -= [
       "apple_keychain.h",
       "mock_apple_keychain.cc",
       "mock_apple_keychain.h",
     ]
   }
 
   if (!is_linux) {
@@ skipping 12 matching lines @@
       "mac_security_services_lock.h",
     ]
   }
   if (!is_win) {
     sources -= [
       "capi_util.cc",
       "capi_util.h",
     ]
   }
 
-  if (use_nss) {
-    configs += [ "//third_party/nss:nss_linux_config" ]
-  } else {
+  if (!use_nss) {
     sources -= [
       "ec_private_key_nss.cc",
       "ec_signature_creator_nss.cc",
       "encryptor_nss.cc",
       "hmac_nss.cc",
       "nss_util.cc",
       "nss_util.h",
       "rsa_private_key_nss.cc",
       "secure_hash_default.cc",
       "signature_creator_nss.cc",
@@ skipping 17 matching lines @@
       "openssl_util.h",
       "rsa_private_key_openssl.cc",
       "secure_hash_openssl.cc",
       "signature_creator_openssl.cc",
       "signature_verifier_openssl.cc",
       "symmetric_key_openssl.cc",
     ]
   }
 
   defines = [ "CRYPTO_IMPLEMENTATION" ]
-
-  # TODO(brettw) once GYP compat is no longer necessary, just move
-  # crypto_minimal_sources to the crypto_minimal target and include a
-  # dependency on it here.
-  sources += crypto_minimal_sources
 }
 
 # A minimal crypto subset for core features that small standalone targets can
 # use to reduce code size.
-static_library("crypto_minimal") {
-  sources = crypto_minimal_sources
+source_set("crypto_minimal") {
+  sources = [
+    "hmac.cc",
+    "hmac.h",
+    "hmac_win.cc",
+    "secure_util.cc",
+    "secure_util.h",
+    "symmetric_key.h",
+    "symmetric_key_win.cc",
+    "third_party/nss/chromium-sha256.h",
+    "third_party/nss/sha512.cc",
+  ]
 
   deps = [
+    ":platform",

[Ryan Sleevi, 2014/04/14 21:00:59]

crypto_minimal doesn't depend on :platform, just noticed this.

It's only used by NaCl, and only depends on Win32 stuff (mod the hermetic sha-2
included)

     "//base",
     "//base/third_party/dynamic_annotations",
   ]
 
   defines = [ "CRYPTO_IMPLEMENTATION" ]
 }
 
 test("crypto_unittests") {
   sources = [
     # Tests.
@@ skipping 19 matching lines @@
   ]
 
   if (use_openssl) {
     sources -= [
       "nss_util_unittest.cc",
       "openpgp_symmetric_encryption_unittest.cc",
       "rsa_private_key_nss_unittest.cc",
     ]
   }
 
+  if (use_openssl || !is_linux) {
+    sources -= [
+      "rsa_private_key_nss_unittest.cc",
+      "openpgp_symmetric_encryption_unittest.cc",
+    ]
+  }
+
+  if (use_openssl) {
+    sources -= [ "nss_util_unittest.cc" ]
+  }
+
   deps = [
     ":crypto",
+    ":platform",
     "//base",
     "//base/test:run_all_unittests",
     "//base/test:test_support",
     "//testing/gmock",
     "//testing/gtest",
   ]
+}
 
-  if (is_mac) {
-    #deps += "//third_party/nss:nspr"
+# This is a meta-target that forwards to NSS's SSL library or OpenSSL,
+# according to the state of the crypto flags. A target just wanting to depend
+# on the current SSL library should just depend on this.
+group("platform") {
+  if (use_openssl) {
+    deps = [ "//third_party/openssl" ]
+  } else {
+    deps = [ "//net/third_party/nss/ssl:libssl" ]
+    if (is_linux) {
+      # On Linux, we use the system NSS (excepting SSL where we always use our
+      # own).
+      direct_dependent_configs = [
+        "//third_party/nss:system_nss_no_ssl_config"
+      ]
+    } else {
+      # Non-Linux platforms use the hermetic NSS from the tree.
+      deps += [
+        "//third_party/nss:nspr",
+        "//third_party/nss:nss",
+      ]
+    }
   }
 }