net: retain leading zero bytes in X.509 serial numbers.

net/base/x509_certificate_nss.cc

 // Copyright (c) 2011 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/base/x509_certificate.h"
 
 #include <cert.h>
 #include <cryptohi.h>
 #include <nss.h>
 #include <pk11pub.h>
@@ skipping 663 matching lines @@
   ParsePrincipal(&cert_handle_->issuer, &issuer_);
 
   ParseDate(&cert_handle_->validity.notBefore, &valid_start_);
   ParseDate(&cert_handle_->validity.notAfter, &valid_expiry_);
 
   fingerprint_ = CalculateFingerprint(cert_handle_);
 
   serial_number_ = std::string(
       reinterpret_cast<char*>(cert_handle_->serialNumber.data),
       cert_handle_->serialNumber.len);
-  // Remove leading zeros.
-  while (serial_number_.size() > 1 && serial_number_[0] == 0)
-    serial_number_ = serial_number_.substr(1, serial_number_.size() - 1);
 }
 
 // static
 X509Certificate* X509Certificate::CreateSelfSigned(
     crypto::RSAPrivateKey* key,
     const std::string& subject,
     uint32 serial_number,
     base::TimeDelta valid_duration) {
   DCHECK(key);
 
@@ skipping 322 matching lines @@
 
 // static
 bool X509Certificate::WriteOSCertHandleToPickle(OSCertHandle cert_handle,
                                                 Pickle* pickle) {
   return pickle->WriteData(
       reinterpret_cast<const char*>(cert_handle->derCert.data),
       cert_handle->derCert.len);
 }
 
 }  // namespace net