Move some functions from net/cert/x509_util_nss.cc into x509_certificate_nss.cc

net/cert/x509_certificate_nss.cc

 // Copyright (c) 2012 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.
 
 #include <cert.h>
 #include <cryptohi.h>
 #include <keyhi.h>
 #include <nss.h>
 #include <pk11pub.h>
 #include <prtime.h>
 #include <seccomon.h>
 #include <secder.h>
 #include <sechash.h>
 
 #include <memory>
 
 #include "base/logging.h"
 #include "base/numerics/safe_conversions.h"
 #include "base/pickle.h"
 #include "base/strings/stringprintf.h"
 #include "base/time/time.h"
 #include "crypto/nss_util.h"
 #include "crypto/scoped_nss_types.h"
 #include "net/cert/x509_certificate.h"
 #include "net/cert/x509_util_nss.h"
 
 namespace net {
 
+namespace {
+
+// Callback for CERT_DecodeCertPackage(), used in
+// CreateOSCertHandlesFromBytes().
+SECStatus PR_CALLBACK CollectCertsCallback(void* arg,
+                                           SECItem** certs,
+                                           int num_certs) {
+  X509Certificate::OSCertHandles* results =
+      reinterpret_cast<X509Certificate::OSCertHandles*>(arg);
+
+  for (int i = 0; i < num_certs; ++i) {
+    X509Certificate::OSCertHandle handle =
+        X509Certificate::CreateOSCertHandleFromBytes(
+            reinterpret_cast<char*>(certs[i]->data), certs[i]->len);
+    if (handle)
+      results->push_back(handle);
+  }
+
+  return SECSuccess;
+}
+
+// Parses the Principal attribute from |name| and outputs the result in
+// |principal|. Returns true on success.
+bool ParsePrincipal(CERTName* name, CertPrincipal* principal) {
+// Starting in NSS 3.15, CERTGetNameFunc takes a const CERTName* argument.
+#if NSS_VMINOR >= 15
+  typedef char* (*CERTGetNameFunc)(const CERTName* name);
+#else
+  typedef char* (*CERTGetNameFunc)(CERTName * name);
+#endif
+
+  // TODO(jcampan): add business_category and serial_number.
+  // TODO(wtc): NSS has the CERT_GetOrgName, CERT_GetOrgUnitName, and
+  // CERT_GetDomainComponentName functions, but they return only the most
+  // general (the first) RDN.  NSS doesn't have a function for the street
+  // address.
+  static const SECOidTag kOIDs[] = {
+      SEC_OID_AVA_STREET_ADDRESS, SEC_OID_AVA_ORGANIZATION_NAME,
+      SEC_OID_AVA_ORGANIZATIONAL_UNIT_NAME, SEC_OID_AVA_DC};
+
+  std::vector<std::string>* values[] = {
+      &principal->street_addresses, &principal->organization_names,
+      &principal->organization_unit_names, &principal->domain_components};
+  DCHECK_EQ(arraysize(kOIDs), arraysize(values));
+
+  CERTRDN** rdns = name->rdns;
+  for (size_t rdn = 0; rdns[rdn]; ++rdn) {
+    CERTAVA** avas = rdns[rdn]->avas;
+    for (size_t pair = 0; avas[pair] != 0; ++pair) {
+      SECOidTag tag = CERT_GetAVATag(avas[pair]);
+      for (size_t oid = 0; oid < arraysize(kOIDs); ++oid) {
+        if (kOIDs[oid] == tag) {
+          SECItem* decode_item = CERT_DecodeAVAValue(&avas[pair]->value);
+          if (!decode_item)
+            return false;
+          // TODO(wtc): Pass decode_item to CERT_RFC1485_EscapeAndQuote.
+          std::string value(reinterpret_cast<char*>(decode_item->data),
+                            decode_item->len);
+          values[oid]->push_back(value);
+          SECITEM_FreeItem(decode_item, PR_TRUE);
+          break;
+        }
+      }
+    }
+  }
+
+  // Get CN, L, S, and C.
+  CERTGetNameFunc get_name_funcs[4] = {CERT_GetCommonName, CERT_GetLocalityName,
+                                       CERT_GetStateName, CERT_GetCountryName};
+  std::string* single_values[4] = {
+      &principal->common_name, &principal->locality_name,
+      &principal->state_or_province_name, &principal->country_name};
+  for (size_t i = 0; i < arraysize(get_name_funcs); ++i) {
+    char* value = get_name_funcs[i](name);
+    if (value) {
+      single_values[i]->assign(value);
+      PORT_Free(value);
+    }
+  }
+
+  return true;
+}
+
+// Parses the date from |der_date| and outputs the result in |result|.
+// Returns true on success.
+bool ParseDate(const SECItem* der_date, base::Time* result) {
+  PRTime prtime;
+  SECStatus rv = DER_DecodeTimeChoice(&prtime, der_date);
+  if (rv != SECSuccess)
+    return false;
+  *result = crypto::PRTimeToBaseTime(prtime);
+  return true;
+}
+
+// Parses the serial number from |certificate|.
+std::string ParseSerialNumber(const CERTCertificate* certificate) {
+  return std::string(reinterpret_cast<char*>(certificate->serialNumber.data),
+                     certificate->serialNumber.len);
+}
+
+typedef std::unique_ptr<CERTName,
+                        crypto::NSSDestroyer<CERTName, CERT_DestroyName>>
+    ScopedCERTName;
+
+// Create a new CERTName object from its encoded representation.
+// |arena| is the allocation pool to use.
+// |data| points to a DER-encoded X.509 DistinguishedName.
+// Return a new CERTName pointer on success, or NULL.
+CERTName* CreateCertNameFromEncoded(PLArenaPool* arena,
+                                    const base::StringPiece& data) {
+  if (!arena)
+    return NULL;
+
+  ScopedCERTName name(PORT_ArenaZNew(arena, CERTName));
+  if (!name.get())
+    return NULL;
+
+  SECItem item;
+  item.len = static_cast<unsigned int>(data.length());
+  item.data = reinterpret_cast<unsigned char*>(const_cast<char*>(data.data()));
+
+  SECStatus rv = SEC_ASN1DecodeItem(arena, name.get(),
+                                    SEC_ASN1_GET(CERT_NameTemplate), &item);
+  if (rv != SECSuccess)
+    return NULL;
+
+  return name.release();
+}
+
+// Create a list of CERTName objects from a list of DER-encoded X.509
+// DistinguishedName items. All objects are created in a given arena.
+// |encoded_issuers| is the list of encoded DNs.
+// |arena| is the arena used for all allocations.
+// |out| will receive the result list on success.
+// Return true on success. On failure, the caller must free the
+// intermediate CERTName objects pushed to |out|.
+bool GetIssuersFromEncodedList(const std::vector<std::string>& encoded_issuers,
+                               PLArenaPool* arena,
+                               std::vector<CERTName*>* out) {
+  std::vector<CERTName*> result;
+  for (size_t n = 0; n < encoded_issuers.size(); ++n) {
+    CERTName* name = CreateCertNameFromEncoded(arena, encoded_issuers[n]);
+    if (name != NULL)
+      result.push_back(name);
+  }
+
+  if (result.size() == encoded_issuers.size()) {
+    out->swap(result);
+    return true;
+  }
+
+  for (size_t n = 0; n < result.size(); ++n)
+    CERT_DestroyName(result[n]);
+  return false;
+}
+
+// Returns true iff a certificate is issued by any of the issuers listed
+// by name in |valid_issuers|.
+// |cert_chain| is the certificate's chain.
+// |valid_issuers| is a list of strings, where each string contains
+// a DER-encoded X.509 Distinguished Name.
+bool IsCertificateIssuedBy(const std::vector<CERTCertificate*>& cert_chain,
+                           const std::vector<CERTName*>& valid_issuers) {
+  for (size_t n = 0; n < cert_chain.size(); ++n) {
+    CERTName* cert_issuer = &cert_chain[n]->issuer;
+    for (size_t i = 0; i < valid_issuers.size(); ++i) {
+      if (CERT_CompareName(valid_issuers[i], cert_issuer) == SECEqual)
+        return true;
+    }
+  }
+  return false;
+}
+
+}  // namespace
+
 bool X509Certificate::Initialize() {
-  serial_number_ = x509_util::ParseSerialNumber(cert_handle_);
+  serial_number_ = ParseSerialNumber(cert_handle_);
 
-  return (
-      !serial_number_.empty() &&
-      x509_util::ParsePrincipal(&cert_handle_->subject, &subject_) &&
-      x509_util::ParsePrincipal(&cert_handle_->issuer, &issuer_) &&
-      x509_util::ParseDate(&cert_handle_->validity.notBefore, &valid_start_) &&
-      x509_util::ParseDate(&cert_handle_->validity.notAfter, &valid_expiry_));
+  return (!serial_number_.empty() &&
+          ParsePrincipal(&cert_handle_->subject, &subject_) &&
+          ParsePrincipal(&cert_handle_->issuer, &issuer_) &&
+          ParseDate(&cert_handle_->validity.notBefore, &valid_start_) &&
+          ParseDate(&cert_handle_->validity.notAfter, &valid_expiry_));
 }
 
 std::string X509Certificate::GetDefaultNickname(CertType type) const {
   std::string result;
   if (type == USER_CERT && cert_handle_->slot) {
     // Find the private key for this certificate and see if it has a
     // nickname.  If there is a private key, and it has a nickname, then
     // return that nickname.
     SECKEYPrivateKey* private_key = PK11_FindPrivateKeyFromCert(
         cert_handle_->slot,
@@ skipping 37 matching lines @@
     case OTHER_CERT:
     default:
       break;
   }
   return result;
 }
 
 bool X509Certificate::GetSubjectAltName(
     std::vector<std::string>* dns_names,
     std::vector<std::string>* ip_addrs) const {
-  return x509_util::GetSubjectAltName(cert_handle_, dns_names, ip_addrs);
+  if (dns_names)
+    dns_names->clear();
+  if (ip_addrs)
+    ip_addrs->clear();
+
+  SECItem alt_name;
+  SECStatus rv = CERT_FindCertExtension(
+      cert_handle_, SEC_OID_X509_SUBJECT_ALT_NAME, &alt_name);
+  if (rv != SECSuccess)
+    return false;
+
+  crypto::ScopedPLArenaPool arena(PORT_NewArena(DER_DEFAULT_CHUNKSIZE));
+
+  CERTGeneralName* alt_name_list;
+  alt_name_list = CERT_DecodeAltNameExtension(arena.get(), &alt_name);
+  SECITEM_FreeItem(&alt_name, PR_FALSE);
+
+  bool has_san = false;
+  CERTGeneralName* name = alt_name_list;
+  while (name) {
+    // DNSName and IPAddress are encoded as IA5String and OCTET STRINGs
+    // respectively, both of which can be byte copied from
+    // SECItemType::data into the appropriate output vector.
+    if (name->type == certDNSName) {
+      has_san = true;
+      if (dns_names) {
+        dns_names->push_back(
+            std::string(reinterpret_cast<char*>(name->name.other.data),
+                        name->name.other.len));
+      }
+    } else if (name->type == certIPAddress) {
+      has_san = true;
+      if (ip_addrs) {
+        ip_addrs->push_back(
+            std::string(reinterpret_cast<char*>(name->name.other.data),
+                        name->name.other.len));
+      }
+    }
+    // Fast path: Found at least one subjectAltName and the caller doesn't
+    // need the actual values.
+    if (has_san && !ip_addrs && !dns_names)
+      return true;
+
+    name = CERT_GetNextGeneralName(name);
+    if (name == alt_name_list)
+      break;
+  }
+  return has_san;
 }
 
 bool X509Certificate::IsIssuedByEncoded(
     const std::vector<std::string>& valid_issuers) {
   // Get certificate chain as scoped list of CERTCertificate objects.
   std::vector<CERTCertificate*> cert_chain;
   cert_chain.push_back(cert_handle_);
   for (size_t n = 0; n < intermediate_ca_certs_.size(); ++n) {
     cert_chain.push_back(intermediate_ca_certs_[n]);
   }
   // Convert encoded issuers to scoped CERTName* list.
   std::vector<CERTName*> issuers;
   crypto::ScopedPLArenaPool arena(PORT_NewArena(DER_DEFAULT_CHUNKSIZE));
-  if (!x509_util::GetIssuersFromEncodedList(valid_issuers,
-                                            arena.get(),
-                                            &issuers)) {
+  if (!GetIssuersFromEncodedList(valid_issuers, arena.get(), &issuers)) {
     return false;
   }
-  return x509_util::IsCertificateIssuedBy(cert_chain, issuers);
+  return IsCertificateIssuedBy(cert_chain, issuers);
 }
 
 // static
 bool X509Certificate::GetDEREncoded(X509Certificate::OSCertHandle cert_handle,
                                     std::string* encoded) {
   if (!cert_handle || !cert_handle->derCert.len)
     return false;
   encoded->assign(reinterpret_cast<char*>(cert_handle->derCert.data),
                   cert_handle->derCert.len);
   return true;
@@ skipping 35 matching lines @@
   return CERT_NewTempCertificate(CERT_GetDefaultCertDB(), &der_cert,
                                  const_cast<char*>(nickname),
                                  PR_FALSE, PR_TRUE);
 }
 
 // static
 X509Certificate::OSCertHandles X509Certificate::CreateOSCertHandlesFromBytes(
     const char* data,
     size_t length,
     Format format) {
-  return x509_util::CreateOSCertHandlesFromBytes(data, length, format);
+  X509Certificate::OSCertHandles results;
+
+  crypto::EnsureNSSInit();
+
+  if (!NSS_IsInitialized())
+    return results;
+
+  switch (format) {
+    case X509Certificate::FORMAT_SINGLE_CERTIFICATE: {
+      X509Certificate::OSCertHandle handle =
+          X509Certificate::CreateOSCertHandleFromBytes(data, length);
+      if (handle)
+        results.push_back(handle);
+      break;
+    }
+    case X509Certificate::FORMAT_PKCS7: {
+      // Make a copy since CERT_DecodeCertPackage may modify it
+      std::vector<char> data_copy(data, data + length);
+
+      SECStatus result = CERT_DecodeCertPackage(
+          data_copy.data(), base::checked_cast<int>(data_copy.size()),
+          CollectCertsCallback, &results);
+      if (result != SECSuccess)
+        results.clear();
+      break;
+    }
+    default:
+      NOTREACHED() << "Certificate format " << format << " unimplemented";
+      break;
+  }
+
+  return results;
 }
 
 // static
 X509Certificate::OSCertHandle X509Certificate::DupOSCertHandle(
     OSCertHandle cert_handle) {
   return CERT_DupCertificate(cert_handle);
 }
 
 // static
 void X509Certificate::FreeOSCertHandle(OSCertHandle cert_handle) {
@@ skipping 33 matching lines @@
   HASH_End(sha256_ctx, sha256.data, &result_len,
            HASH_ResultLenContext(sha256_ctx));
   HASH_Destroy(sha256_ctx);
 
   return sha256;
 }
 
 // static
 X509Certificate::OSCertHandle X509Certificate::ReadOSCertHandleFromPickle(
     base::PickleIterator* pickle_iter) {
-  return x509_util::ReadOSCertHandleFromPickle(pickle_iter);
+  const char* data;
+  int length;
+  if (!pickle_iter->ReadData(&data, &length))
+    return NULL;
+
+  return CreateOSCertHandleFromBytes(data, length);
 }
 
 // static
 bool X509Certificate::WriteOSCertHandleToPickle(OSCertHandle cert_handle,
                                                 base::Pickle* pickle) {
   return pickle->WriteData(
       reinterpret_cast<const char*>(cert_handle->derCert.data),
       cert_handle->derCert.len);
 }
 
 // static
 void X509Certificate::GetPublicKeyInfo(OSCertHandle cert_handle,
                                        size_t* size_bits,
                                        PublicKeyType* type) {
-  x509_util::GetPublicKeyInfo(cert_handle, size_bits, type);
+  // Since we might fail, set the output parameters to default values first.
+  *type = X509Certificate::kPublicKeyTypeUnknown;
+  *size_bits = 0;
+
+  crypto::ScopedSECKEYPublicKey key(CERT_ExtractPublicKey(cert_handle));
+  if (!key.get())
+    return;
+
+  *size_bits = SECKEY_PublicKeyStrengthInBits(key.get());
+
+  switch (key->keyType) {
+    case rsaKey:
+      *type = X509Certificate::kPublicKeyTypeRSA;
+      break;
+    case dsaKey:
+      *type = X509Certificate::kPublicKeyTypeDSA;
+      break;
+    case dhKey:
+      *type = X509Certificate::kPublicKeyTypeDH;
+      break;
+    case ecKey:
+      *type = X509Certificate::kPublicKeyTypeECDSA;
+      break;
+    default:
+      *type = X509Certificate::kPublicKeyTypeUnknown;
+      *size_bits = 0;
+      break;
+  }
 }
 
 // static
 bool X509Certificate::IsSelfSigned(OSCertHandle cert_handle) {
   crypto::ScopedSECKEYPublicKey public_key(CERT_ExtractPublicKey(cert_handle));
   if (!public_key.get())
     return false;
   if (SECSuccess != CERT_VerifySignedDataWithPublicKey(
                         &cert_handle->signatureWrap, public_key.get(), NULL)) {
     return false;
   }
   return CERT_CompareName(&cert_handle->subject, &cert_handle->issuer) ==
          SECEqual;
 }
 
 }  // namespace net