Add parsing for RFC 5280's InhibitAnyPolicy.

net/cert/internal/parse_certificate.cc

 // Copyright 2015 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 "net/cert/internal/parse_certificate.h"
 
 #include <utility>
 
 #include "base/strings/string_util.h"
 #include "net/cert/internal/cert_errors.h"
@@ skipping 533 matching lines @@
 der::Input AdOcspOid() {
   // From RFC 5280:
   //
   //     id-ad-ocsp OBJECT IDENTIFIER ::= { id-ad 1 }
   //
   // In dotted notation: 1.3.6.1.5.5.7.48.1
   static const uint8_t oid[] = {0x2B, 0x06, 0x01, 0x05, 0x05, 0x07, 0x30, 0x01};
   return der::Input(oid);
 }
 
+der::Input InhibitAnyPolicyOid() {
+  // From RFC 5280:
+  //
+  //     id-ce-inhibitAnyPolicy OBJECT IDENTIFIER ::=  { id-ce 54 }
+  //
+  // In dotted notation: 2.5.29.54
+  static const uint8_t oid[] = {0x55, 0x1d, 0x36};
+  return der::Input(oid);
+}
+
 NET_EXPORT bool ParseExtensions(
     const der::Input& extensions_tlv,
     std::map<der::Input, ParsedExtension>* extensions) {
   der::Parser parser(extensions_tlv);
 
   //    Extensions  ::=  SEQUENCE SIZE (1..MAX) OF Extension
   der::Parser extensions_parser;
   if (!parser.ReadSequence(&extensions_parser))
     return false;
 
@@ skipping 223 matching lines @@
     out->inhibit_policy_mapping = 0;
   }
 
   // There should be no remaining data.
   if (sequence_parser.HasMore() || parser.HasMore())
     return false;
 
   return true;
 }
 
+// From RFC 5280:
+//
+//   InhibitAnyPolicy ::= SkipCerts
+//
+//   SkipCerts ::= INTEGER (0..MAX)
+bool ParseInhibitAnyPolicy(const der::Input& inhibit_any_policy_tlv,
+                           uint8_t* out) {
+  der::Parser parser(inhibit_any_policy_tlv);
+
+  // TODO(eroman): Surface reason for failure if length was longer than uint8.
+  if (!parser.ReadUint8(out))
+    return false;
+
+  // There should be no remaining data.
+  if (parser.HasMore())
+    return false;
+
+  return true;
+}
+
 }  // namespace net