Add error details to TBSCertificate parsing function and tests.

net/cert/internal/parse_certificate_unittest.cc

Index: net/cert/internal/parse_certificate_unittest.cc
diff --git a/net/cert/internal/parse_certificate_unittest.cc b/net/cert/internal/parse_certificate_unittest.cc
index 94417d63d79fffb63d04cace288ccfe9ee6a0f8b..b1de4260889ac108de4950311ea115596e6e010c 100644
--- a/net/cert/internal/parse_certificate_unittest.cc
+++ b/net/cert/internal/parse_certificate_unittest.cc
@@ -122,8 +122,11 @@ TEST(ParseCertificateTest, AlgorithmNotSequence) {
 // Loads tbsCertificate data and expectations from the PEM file |file_name|.
 // Verifies that parsing the TBSCertificate succeeds, and each parsed field
 // matches the expectations.
-void EnsureParsingTbsSucceeds(const std::string& file_name,
-                              CertificateVersion expected_version) {
+//
+// TODO(eroman): Get rid of the |expected_version| parameter -- this should be
+// encoded in the test expectations file.
+void RunTbsCertificateTestGivenVersion(const std::string& file_name,
+                                       CertificateVersion expected_version) {
   std::string data;
   std::string expected_serial_number;
   std::string expected_signature_algorithm;
@@ -135,26 +138,39 @@ void EnsureParsingTbsSucceeds(const std::string& file_name,
   std::string expected_issuer_unique_id;
   std::string expected_subject_unique_id;
   std::string expected_extensions;
+  std::string expected_errors;
 
   // Read the certificate data and test expectations from a single PEM file.
   const PemBlockMapping mappings[] = {
       {"TBS CERTIFICATE", &data},
-      {"SIGNATURE ALGORITHM", &expected_signature_algorithm},
-      {"SERIAL NUMBER", &expected_serial_number},
-      {"ISSUER", &expected_issuer},
-      {"VALIDITY NOTBEFORE", &expected_validity_not_before},
-      {"VALIDITY NOTAFTER", &expected_validity_not_after},
-      {"SUBJECT", &expected_subject},
-      {"SPKI", &expected_spki},
+      {"SIGNATURE ALGORITHM", &expected_signature_algorithm, true},
+      {"SERIAL NUMBER", &expected_serial_number, true},
+      {"ISSUER", &expected_issuer, true},
+      {"VALIDITY NOTBEFORE", &expected_validity_not_before, true},
+      {"VALIDITY NOTAFTER", &expected_validity_not_after, true},
+      {"SUBJECT", &expected_subject, true},
+      {"SPKI", &expected_spki, true},
       {"ISSUER UNIQUE ID", &expected_issuer_unique_id, true},
       {"SUBJECT UNIQUE ID", &expected_subject_unique_id, true},
       {"EXTENSIONS", &expected_extensions, true},
+      {"ERRORS", &expected_errors, true},
   };
-  ASSERT_TRUE(ReadTestDataFromPemFile(GetFilePath(file_name), mappings));
+  std::string test_file_path = GetFilePath(file_name);
+  ASSERT_TRUE(ReadTestDataFromPemFile(test_file_path, mappings));
+
+  bool expected_result = !expected_spki.empty();
 
-  // Parsing the TBSCertificate should succeed.
   ParsedTbsCertificate parsed;
-  ASSERT_TRUE(ParseTbsCertificate(der::Input(&data), {}, &parsed));
+  CertErrors errors;
+  bool actual_result =
+      ParseTbsCertificate(der::Input(&data), {}, &parsed, &errors);
+
+  EXPECT_EQ(expected_result, actual_result);
+  EXPECT_EQ(expected_errors, errors.ToDebugString()) << "Test file: "
+                                                     << test_file_path;
+
+  if (!expected_result || !actual_result)
+    return;
 
   // Ensure that the ParsedTbsCertificate matches expectations.
   EXPECT_EQ(expected_version, parsed.version);
@@ -184,30 +200,18 @@ void EnsureParsingTbsSucceeds(const std::string& file_name,
   EXPECT_EQ(!expected_extensions.empty(), parsed.has_extensions);
 }
 
-// Loads certificate data from the PEM file |file_name| and verifies that the
-// Certificate parsing succeed, however the TBSCertificate parsing fails.
-void EnsureParsingTbsFails(const std::string& file_name) {
-  std::string data;
-
-  const PemBlockMapping mappings[] = {
-      {"TBS CERTIFICATE", &data},
-  };
-
-  ASSERT_TRUE(ReadTestDataFromPemFile(GetFilePath(file_name), mappings));
-
-  // Parsing the TBSCertificate should fail.
-  ParsedTbsCertificate parsed;
-  ASSERT_FALSE(ParseTbsCertificate(der::Input(&data), {}, &parsed));
+void RunTbsCertificateTest(const std::string& file_name) {
+  RunTbsCertificateTestGivenVersion(file_name, CertificateVersion::V3);
 }
 
 // Tests parsing a TBSCertificate for v3 that contains no optional fields.
 TEST(ParseTbsCertificateTest, Version3NoOptionals) {
-  EnsureParsingTbsSucceeds("tbs_v3_no_optionals.pem", CertificateVersion::V3);
+  RunTbsCertificateTest("tbs_v3_no_optionals.pem");
 }
 
 // Tests parsing a TBSCertificate for v3 that contains extensions.
 TEST(ParseTbsCertificateTest, Version3WithExtensions) {
-  EnsureParsingTbsSucceeds("tbs_v3_extensions.pem", CertificateVersion::V3);
+  RunTbsCertificateTest("tbs_v3_extensions.pem");
 }
 
 // Tests parsing a TBSCertificate for v3 that contains no optional fields, and
@@ -216,115 +220,111 @@ TEST(ParseTbsCertificateTest, Version3WithExtensions) {
 // CAs are not supposed to include negative serial numbers, however RFC 5280
 // expects consumers to deal with it anyway).
 TEST(ParseTbsCertificateTest, NegativeSerialNumber) {
-  EnsureParsingTbsSucceeds("tbs_negative_serial_number.pem",
-                           CertificateVersion::V3);
+  RunTbsCertificateTest("tbs_negative_serial_number.pem");
 }
 
 // Tests parsing a TBSCertificate with a serial number that is 21 octets long
 // (and the first byte is 0).
 TEST(ParseTbCertificateTest, SerialNumber21OctetsLeading0) {
-  EnsureParsingTbsFails("tbs_serial_number_21_octets_leading_0.pem");
+  RunTbsCertificateTest("tbs_serial_number_21_octets_leading_0.pem");
 }
 
 // Tests parsing a TBSCertificate with a serial number that is 26 octets long
 // (and does not contain a leading 0).
 TEST(ParseTbsCertificateTest, SerialNumber26Octets) {
-  EnsureParsingTbsFails("tbs_serial_number_26_octets.pem");
+  RunTbsCertificateTest("tbs_serial_number_26_octets.pem");
 }
 
 // Tests parsing a TBSCertificate which lacks a version number (causing it to
 // default to v1).
 TEST(ParseTbsCertificateTest, Version1) {
-  EnsureParsingTbsSucceeds("tbs_v1.pem", CertificateVersion::V1);
+  RunTbsCertificateTestGivenVersion("tbs_v1.pem", CertificateVersion::V1);
 }
 
 // The version was set to v1 explicitly rather than omitting the version field.
 TEST(ParseTbsCertificateTest, ExplicitVersion1) {
-  EnsureParsingTbsFails("tbs_explicit_v1.pem");
+  RunTbsCertificateTest("tbs_explicit_v1.pem");
 }
 
 // Extensions are not defined in version 1.
 TEST(ParseTbsCertificateTest, Version1WithExtensions) {
-  EnsureParsingTbsFails("tbs_v1_extensions.pem");
+  RunTbsCertificateTest("tbs_v1_extensions.pem");
 }
 
 // Extensions are not defined in version 2.
 TEST(ParseTbsCertificateTest, Version2WithExtensions) {
-  EnsureParsingTbsFails("tbs_v2_extensions.pem");
+  RunTbsCertificateTest("tbs_v2_extensions.pem");
 }
 
 // A boring version 2 certificate with none of the optional fields.
 TEST(ParseTbsCertificateTest, Version2NoOptionals) {
-  EnsureParsingTbsSucceeds("tbs_v2_no_optionals.pem", CertificateVersion::V2);
+  RunTbsCertificateTestGivenVersion("tbs_v2_no_optionals.pem",
+                                    CertificateVersion::V2);
 }
 
 // A version 2 certificate with an issuer unique ID field.
 TEST(ParseTbsCertificateTest, Version2IssuerUniqueId) {
-  EnsureParsingTbsSucceeds("tbs_v2_issuer_unique_id.pem",
-                           CertificateVersion::V2);
+  RunTbsCertificateTestGivenVersion("tbs_v2_issuer_unique_id.pem",
+                                    CertificateVersion::V2);
 }
 
 // A version 2 certificate with both a issuer and subject unique ID field.
 TEST(ParseTbsCertificateTest, Version2IssuerAndSubjectUniqueId) {
-  EnsureParsingTbsSucceeds("tbs_v2_issuer_and_subject_unique_id.pem",
-                           CertificateVersion::V2);
+  RunTbsCertificateTestGivenVersion("tbs_v2_issuer_and_subject_unique_id.pem",
+                                    CertificateVersion::V2);
 }
 
 // A version 3 certificate with all of the optional fields (issuer unique id,
 // subject unique id, and extensions).
 TEST(ParseTbsCertificateTest, Version3AllOptionals) {
-  EnsureParsingTbsSucceeds("tbs_v3_all_optionals.pem", CertificateVersion::V3);
+  RunTbsCertificateTest("tbs_v3_all_optionals.pem");
 }
 
 // The version was set to v4, which is unrecognized.
 TEST(ParseTbsCertificateTest, Version4) {
-  EnsureParsingTbsFails("tbs_v4.pem");
+  RunTbsCertificateTest("tbs_v4.pem");
 }
 
 // Tests that extraneous data after extensions in a v3 is rejected.
 TEST(ParseTbsCertificateTest, Version3DataAfterExtensions) {
-  EnsureParsingTbsFails("tbs_v3_data_after_extensions.pem");
+  RunTbsCertificateTest("tbs_v3_data_after_extensions.pem");
 }
 
 // Tests using a real-world certificate (whereas the other tests are fabricated
 // (and in fact invalid) data.
 TEST(ParseTbsCertificateTest, Version3Real) {
-  EnsureParsingTbsSucceeds("tbs_v3_real.pem", CertificateVersion::V3);
+  RunTbsCertificateTest("tbs_v3_real.pem");
 }
 
 // Parses a TBSCertificate whose "validity" field expresses both notBefore
 // and notAfter using UTCTime.
 TEST(ParseTbsCertificateTest, ValidityBothUtcTime) {
-  EnsureParsingTbsSucceeds("tbs_validity_both_utc_time.pem",
-                           CertificateVersion::V3);
+  RunTbsCertificateTest("tbs_validity_both_utc_time.pem");
 }
 
 // Parses a TBSCertificate whose "validity" field expresses both notBefore
 // and notAfter using GeneralizedTime.
 TEST(ParseTbsCertificateTest, ValidityBothGeneralizedTime) {
-  EnsureParsingTbsSucceeds("tbs_validity_both_generalized_time.pem",
-                           CertificateVersion::V3);
+  RunTbsCertificateTest("tbs_validity_both_generalized_time.pem");
 }
 
 // Parses a TBSCertificate whose "validity" field expresses notBefore using
 // UTCTime and notAfter using GeneralizedTime.
 TEST(ParseTbsCertificateTest, ValidityUTCTimeAndGeneralizedTime) {
-  EnsureParsingTbsSucceeds("tbs_validity_utc_time_and_generalized_time.pem",
-                           CertificateVersion::V3);
+  RunTbsCertificateTest("tbs_validity_utc_time_and_generalized_time.pem");
 }
 
 // Parses a TBSCertificate whose validity" field expresses notBefore using
 // GeneralizedTime and notAfter using UTCTime. Also of interest, notBefore >
 // notAfter. Parsing will succeed, however no time can satisfy this constraint.
 TEST(ParseTbsCertificateTest, ValidityGeneralizedTimeAndUTCTime) {
-  EnsureParsingTbsSucceeds("tbs_validity_generalized_time_and_utc_time.pem",
-                           CertificateVersion::V3);
+  RunTbsCertificateTest("tbs_validity_generalized_time_and_utc_time.pem");
 }
 
 // Parses a TBSCertificate whose "validity" field does not strictly follow
 // the DER rules (and fails to be parsed).
 TEST(ParseTbsCertificateTest, ValidityRelaxed) {
-  EnsureParsingTbsFails("tbs_validity_relaxed.pem");
+  RunTbsCertificateTest("tbs_validity_relaxed.pem");
 }
 
 // Reads a PEM file containing a block "EXTENSION". This input will be