Add unittests for certificate and file parsing.

net/tools/transport_security_state_generator/transport_security_state_generator.cc

Index: net/tools/transport_security_state_generator/transport_security_state_generator.cc
diff --git a/net/tools/transport_security_state_generator/transport_security_state_generator.cc b/net/tools/transport_security_state_generator/transport_security_state_generator.cc
index 4e93a49398ee4abccec38ab7b1798b49fa8aee95..4aec52d04498b82e81aadf3ba1305c0e56b7fa8c 100644
--- a/net/tools/transport_security_state_generator/transport_security_state_generator.cc
+++ b/net/tools/transport_security_state_generator/transport_security_state_generator.cc
@@ -11,31 +11,19 @@
 
 #include "base/command_line.h"
 #include "base/files/file_util.h"
-#include "base/json/json_reader.h"
 #include "base/logging.h"
 #include "base/path_service.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/string_piece.h"
-#include "base/strings/string_split.h"
-#include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
-#include "base/values.h"
 #include "crypto/openssl_util.h"
-#include "net/tools/transport_security_state_generator/cert_util.h"
-#include "net/tools/transport_security_state_generator/pinset.h"
+#include "net/tools/transport_security_state_generator/input_file_parsers.h"
 #include "net/tools/transport_security_state_generator/pinsets.h"
 #include "net/tools/transport_security_state_generator/preloaded_state_generator.h"
-#include "net/tools/transport_security_state_generator/spki_hash.h"
 #include "net/tools/transport_security_state_generator/transport_security_state_entry.h"
-#include "third_party/boringssl/src/include/openssl/x509v3.h"
 
-using net::transport_security_state::TransportSecurityStateEntry;
 using net::transport_security_state::TransportSecurityStateEntries;
-using net::transport_security_state::Pinset;
 using net::transport_security_state::Pinsets;
 using net::transport_security_state::PreloadedStateGenerator;
 using net::transport_security_state::DomainIDList;
-using net::transport_security_state::SPKIHash;
 
 namespace {
 
@@ -45,377 +33,6 @@ void PrintHelp() {
             << " <template-file> <output-file> [--v=1]" << std::endl;
 }
 
-// Parses the |json| string and copies the items under the "entries" key to
-// |entries|, the pinsets under the "pinsets" key to |pinsets|, and the domain
-// IDs under the "domain_ids" key to |domain_ids|.
-//
-// More info on the format can be found in
-// net/http/transport_security_state_static.json
-bool ParseJSON(const std::string& json,
-               TransportSecurityStateEntries* entries,
-               Pinsets* pinsets,
-               DomainIDList* domain_ids) {
-  std::unique_ptr<base::Value> value = base::JSONReader::Read(json);
-  base::DictionaryValue* dict_value = nullptr;
-  if (!value.get() || !value->GetAsDictionary(&dict_value)) {
-    LOG(ERROR) << "Could not parse the input JSON file";
-    return false;
-  }
-
-  const base::ListValue* preload_entries = nullptr;
-  if (!dict_value->GetList("entries", &preload_entries)) {
-    LOG(ERROR) << "Could not parse the entries in the input JSON";
-    return false;
-  }
-
-  for (size_t i = 0; i < preload_entries->GetSize(); ++i) {
-    const base::DictionaryValue* parsed = nullptr;
-    if (!preload_entries->GetDictionary(i, &parsed)) {
-      LOG(ERROR) << "Could not parse entry " << base::SizeTToString(i)
-                 << " in the input JSON";
-      return false;
-    }
-
-    std::unique_ptr<TransportSecurityStateEntry> entry(
-        new TransportSecurityStateEntry());
-
-    if (!parsed->GetString("name", &entry->hostname)) {
-      LOG(ERROR) << "Could not extract the hostname for entry "
-                 << base::SizeTToString(i) << " from the input JSON";
-      return false;
-    }
-
-    parsed->GetBoolean("include_subdomains", &entry->include_subdomains);
-    std::string mode;
-    parsed->GetString("mode", &mode);
-    entry->force_https = (mode == "force-https");
-    parsed->GetBoolean("include_subdomains_for_pinning",
-                       &entry->hpkp_include_subdomains);
-    parsed->GetString("pins", &entry->pinset);
-    parsed->GetBoolean("expect_ct", &entry->expect_ct);
-    parsed->GetString("expect_ct_report_uri", &entry->expect_ct_report_uri);
-    parsed->GetBoolean("expect_staple", &entry->expect_staple);
-    parsed->GetBoolean("include_subdomains_for_expect_staple",
-                       &entry->expect_staple_include_subdomains);
-    parsed->GetString("expect_staple_report_uri",
-                      &entry->expect_staple_report_uri);
-
-    entries->push_back(std::move(entry));
-  }
-
-  const base::ListValue* pinsets_list = nullptr;
-  if (!dict_value->GetList("pinsets", &pinsets_list)) {
-    LOG(ERROR) << "Could not parse the pinsets in the input JSON";
-    return false;
-  }
-
-  for (size_t i = 0; i < pinsets_list->GetSize(); ++i) {
-    const base::DictionaryValue* parsed = nullptr;
-    if (!pinsets_list->GetDictionary(i, &parsed)) {
-      LOG(ERROR) << "Could not parse pinset " << base::SizeTToString(i)
-                 << " in the input JSON";
-      return false;
-    }
-
-    std::string name;
-    if (!parsed->GetString("name", &name)) {
-      LOG(ERROR) << "Could not extract the name for pinset "
-                 << base::SizeTToString(i) << " from the input JSON";
-      return false;
-    }
-
-    std::string report_uri;
-    parsed->GetString("report_uri", &report_uri);
-
-    std::unique_ptr<Pinset> pinset(new Pinset(name, report_uri));
-
-    const base::ListValue* pinset_static_hashes_list = nullptr;
-    if (parsed->GetList("static_spki_hashes", &pinset_static_hashes_list)) {
-      for (size_t i = 0; i < pinset_static_hashes_list->GetSize(); ++i) {
-        std::string hash;
-        pinset_static_hashes_list->GetString(i, &hash);
-        pinset->AddStaticSPKIHash(hash);
-      }
-    }
-
-    const base::ListValue* pinset_bad_static_hashes_list = nullptr;
-    if (parsed->GetList("bad_static_spki_hashes",
-                        &pinset_bad_static_hashes_list)) {
-      for (size_t i = 0; i < pinset_bad_static_hashes_list->GetSize(); ++i) {
-        std::string hash;
-        pinset_bad_static_hashes_list->GetString(i, &hash);
-        pinset->AddBadStaticSPKIHash(hash);
-      }
-    }
-
-    pinsets->RegisterPinset(std::move(pinset));
-  }
-
-  // TODO(Martijnc): Remove the domain IDs from the preload format.
-  // https://crbug.com/661206.
-  const base::ListValue* domain_ids_list = nullptr;
-  if (!dict_value->GetList("domain_ids", &domain_ids_list)) {
-    LOG(ERROR) << "Could not parse the domain IDs in the input JSON";
-    return false;
-  }
-
-  for (size_t i = 0; i < domain_ids_list->GetSize(); ++i) {
-    std::string domain;
-    domain_ids_list->GetString(i, &domain);
-    domain_ids->push_back(domain);
-  }
-
-  return true;
-}
-
-bool IsImportantWordInCertificateName(base::StringPiece name) {
-  const char* const important_words[] = {"Universal", "Global", "EV", "G1",
-                                         "G2",        "G3",     "G4", "G5"};
-  for (auto* important_word : important_words) {
-    if (name == important_word) {
-      return true;
-    }
-  }
-  return false;
-}
-
-// Strips all characters not matched by the RegEx [A-Za-z0-9_] from |name| and
-// returns the result.
-std::string FilterName(base::StringPiece name) {
-  std::string filtered;
-  for (const char& character : name) {
-    if ((character >= '0' && character <= '9') ||
-        (character >= 'a' && character <= 'z') ||
-        (character >= 'A' && character <= 'Z') || character == '_') {
-      filtered += character;
-    }
-  }
-  return base::ToLowerASCII(filtered);
-}
-
-// Returns true if |pin_name| is a reasonable match for the certificate name
-// |name|.
-bool MatchCertificateName(base::StringPiece name, base::StringPiece pin_name) {
-  std::vector<base::StringPiece> words = base::SplitStringPiece(
-      name, " ", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
-  if (words.empty()) {
-    LOG(ERROR) << "No words in certificate name for pin "
-               << pin_name.as_string();
-    return false;
-  }
-  base::StringPiece first_word = words[0];
-
-  if (first_word.ends_with(",")) {
-    first_word = first_word.substr(0, first_word.size() - 1);
-  }
-
-  if (first_word.starts_with("*.")) {
-    first_word = first_word.substr(2, first_word.size() - 2);
-  }
-
-  size_t pos = first_word.find('.');
-  if (pos != std::string::npos) {
-    first_word = first_word.substr(0, first_word.size() - pos);
-  }
-
-  pos = first_word.find('-');
-  if (pos != std::string::npos) {
-    first_word = first_word.substr(0, first_word.size() - pos);
-  }
-
-  if (first_word.empty()) {
-    LOG(ERROR) << "First word of certificate name (" << name.as_string()
-               << ") is empty";
-    return false;
-  }
-
-  std::string filtered_word = FilterName(first_word);
-  first_word = filtered_word;
-  if (!base::EqualsCaseInsensitiveASCII(pin_name.substr(0, first_word.size()),
-                                        first_word)) {
-    LOG(ERROR) << "The first word of the certificate name ("
-               << first_word.as_string()
-               << ") isn't a prefix of the variable name ("
-               << pin_name.as_string() << ")";
-    return false;
-  }
-
-  for (size_t i = 0; i < words.size(); ++i) {
-    const base::StringPiece& word = words[i];
-    if (word == "Class" && (i + 1) < words.size()) {
-      std::string class_name = word.as_string();
-      words[i + 1].AppendToString(&class_name);
-
-      size_t pos = pin_name.find(class_name);
-      if (pos == std::string::npos) {
-        LOG(ERROR)
-            << "Certficate class specification doesn't appear in the variable "
-               "name ("
-            << pin_name.as_string() << ")";
-        return false;
-      }
-    } else if (word.size() == 1 && word[0] >= '0' && word[0] <= '9') {
-      size_t pos = pin_name.find(word);
-      if (pos == std::string::npos) {
-        LOG(ERROR) << "Number doesn't appear in the certificate variable name ("
-                   << pin_name.as_string() << ")";
-        return false;
-      }
-    } else if (IsImportantWordInCertificateName(word)) {
-      size_t pos = pin_name.find(word);
-      if (pos == std::string::npos) {
-        LOG(ERROR) << word.as_string() +
-                          " doesn't appear in the certificate variable name ("
-                   << pin_name.as_string() << ")";
-        return false;
-      }
-    }
-  }
-
-  return true;
-}
-
-// Returns true iff |candidate| is not empty, the first character is in the
-// range A-Z, and the remaining characters are in the ranges a-Z, 0-9, or '_'.
-bool IsValidName(const std::string& candidate) {
-  if (candidate.empty() || candidate[0] < 'A' || candidate[0] > 'Z') {
-    return false;
-  }
-
-  bool isValid = true;
-  for (const char& character : candidate) {
-    isValid = (character >= '0' && character <= '9') ||
-              (character >= 'a' && character <= 'z') ||
-              (character >= 'A' && character <= 'Z') || character == '_';
-    if (!isValid) {
-      return false;
-    }
-  }
-  return true;
-}
-
-static const char kStartOfCert[] = "-----BEGIN CERTIFICATE";
-static const char kStartOfPublicKey[] = "-----BEGIN PUBLIC KEY";
-static const char kEndOfCert[] = "-----END CERTIFICATE";
-static const char kEndOfPublicKey[] = "-----END PUBLIC KEY";
-static const char kStartOfSHA256[] = "sha256/";
-
-enum class CertificateParserState {
-  PRE_NAME,
-  POST_NAME,
-  IN_CERTIFICATE,
-  IN_PUBLIC_KEY
-};
-
-// Extracts SPKI information from the preloaded pins file. The SPKI's can be
-// in the form of a PEM certificate, a PEM public key, or a BASE64 string.
-//
-// More info on the format can be found in
-// net/http/transport_security_state_static.pins
-bool ParseCertificatesFile(const std::string& certs_input, Pinsets* pinsets) {
-  std::istringstream input_stream(certs_input);
-  std::string line;
-  CertificateParserState current_state = CertificateParserState::PRE_NAME;
-
-  const base::CompareCase& compare_mode = base::CompareCase::INSENSITIVE_ASCII;
-  std::string name;
-  std::string buffer;
-  std::string subject_name;
-  bssl::UniquePtr<X509> certificate;
-  SPKIHash hash;
-
-  for (std::string line; std::getline(input_stream, line);) {
-    if (line[0] == '#') {
-      continue;
-    }
-
-    if (line.empty() && current_state == CertificateParserState::PRE_NAME) {
-      continue;
-    }
-
-    switch (current_state) {
-      case CertificateParserState::PRE_NAME:
-        if (!IsValidName(line)) {
-          LOG(ERROR) << "Invalid name in pins file: " << line;
-          return false;
-        }
-        name = line;
-        current_state = CertificateParserState::POST_NAME;
-        break;
-      case CertificateParserState::POST_NAME:
-        if (base::StartsWith(line, kStartOfSHA256, compare_mode)) {
-          if (!hash.FromString(line)) {
-            LOG(ERROR) << "Invalid hash value in pins file for " << name;
-            return false;
-          }
-
-          pinsets->RegisterSPKIHash(name, hash);
-          current_state = CertificateParserState::PRE_NAME;
-        } else if (base::StartsWith(line, kStartOfCert, compare_mode)) {
-          buffer = line + '\n';
-          current_state = CertificateParserState::IN_CERTIFICATE;
-        } else if (base::StartsWith(line, kStartOfPublicKey, compare_mode)) {
-          buffer = line + '\n';
-          current_state = CertificateParserState::IN_PUBLIC_KEY;
-        } else {
-          LOG(ERROR) << "Invalid value in pins file for " << name;
-          return false;
-        }
-        break;
-      case CertificateParserState::IN_CERTIFICATE:
-        buffer += line + '\n';
-        if (!base::StartsWith(line, kEndOfCert, compare_mode)) {
-          continue;
-        }
-
-        certificate = GetX509CertificateFromPEM(buffer);
-        if (!certificate) {
-          LOG(ERROR) << "Could not parse certificate " << name;
-          return false;
-        }
-
-        if (!CalculateSPKIHashFromCertificate(certificate.get(), &hash)) {
-          LOG(ERROR) << "Could not extract SPKI from certificate " << name;
-          return false;
-        }
-
-        if (!ExtractSubjectNameFromCertificate(certificate.get(),
-                                               &subject_name)) {
-          LOG(ERROR) << "Could not extract name from certificate " << name;
-          return false;
-        }
-
-        if (!MatchCertificateName(subject_name, name)) {
-          LOG(ERROR) << name << " is not a reasonable name for "
-                     << subject_name;
-          return false;
-        }
-
-        pinsets->RegisterSPKIHash(name, hash);
-        current_state = CertificateParserState::PRE_NAME;
-        break;
-      case CertificateParserState::IN_PUBLIC_KEY:
-        buffer += line + '\n';
-        if (!base::StartsWith(line, kEndOfPublicKey, compare_mode)) {
-          continue;
-        }
-
-        if (!CalculateSPKIHashFromKey(buffer, &hash)) {
-          LOG(ERROR) << "Could not parse the public key for " << name;
-          return false;
-        }
-
-        pinsets->RegisterSPKIHash(name, hash);
-        current_state = CertificateParserState::PRE_NAME;
-        break;
-      default:
-        DCHECK(false) << "Unknown parser state";
-    }
-  }
-
-  return true;
-}
-
 // Checks if there are pins with the same name or the same hash.
 bool CheckForDuplicatePins(const Pinsets& pinsets) {
   std::set<std::string> seen_names;