Add a regression test for normalizing custom attributes.

A recent BoringSSL change broke this. Add a regression test for it
before I try to make the change again.

Bug: 789802
Change-Id: Ibe021424fc6b36b2ef71d91b30f523a2cfae1482
Reviewed-on: https://chromium-review.googlesource.com/828381
Commit-Queue: Matt Mueller <mattm@chromium.org>
Reviewed-by: Matt Mueller <mattm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524467}

net/BUILD.gn

@@ -4005,6 +4005,7 @@ bundle_data("net_unittests_bundle_data") {
     "data/verify_name_match_unittest/names/ascii-UTF8-unmangled.pem",
     "data/verify_name_match_unittest/names/ascii-mixed-rdn_dupetype_sorting_1.pem",
     "data/verify_name_match_unittest/names/ascii-mixed-rdn_dupetype_sorting_2.pem",
+    "data/verify_name_match_unittest/names/custom-custom-normalized.pem",
     "data/verify_name_match_unittest/names/invalid-AttributeTypeAndValue-badAttributeType.pem",
     "data/verify_name_match_unittest/names/invalid-AttributeTypeAndValue-empty.pem",
     "data/verify_name_match_unittest/names/invalid-AttributeTypeAndValue-extradata.pem",

net/cert/internal/verify_name_match_unittest.cc

@@ -597,4 +597,16 @@ TEST(NameNormalizationTest, TestEverything) {
   EXPECT_EQ(normalized_der, renormalized_der);
 }
 
+// Unknown AttributeValue types normalize as-is, even non-primitive tags.
+TEST(NameNormalizationTest, NormalizeCustom) {
+  std::string raw_der;
+  ASSERT_TRUE(LoadTestData("custom", "custom", "normalized", &raw_der));
+
+  std::string normalized_der;
+  CertErrors errors;
+  ASSERT_TRUE(NormalizeName(SequenceValueFromString(&raw_der), &normalized_der,
+                            &errors));
+  EXPECT_EQ(SequenceValueFromString(&raw_der), der::Input(&normalized_der));
+}
+
 }  // namespace net

net/data/verify_name_match_unittest/names/custom-custom-normalized.pem

+    0:d=0  hl=2 l=  29 cons: SEQUENCE
+    2:d=1  hl=2 l=  27 cons:  SET
+    4:d=2  hl=2 l=  25 cons:   SEQUENCE
+    6:d=3  hl=2 l=  12 prim:    OBJECT            :1.2.840.113554.4.1.72585.1
+   20:d=3  hl=2 l=   9 cons:    cont [ 0 ]
+   22:d=4  hl=2 l=   7 cons:     priv [ 1 ]
+   24:d=5  hl=2 l=   5 prim:      appl [ 2 ]
+-----BEGIN NAME-----
+MB0xGzAZBgwqhkiG9xIEAYS3CQGgCeEHQgVoZWxsbw==
+-----END NAME-----