Refuse to accept certificate chains containing any RSA public key smaller

net/base/cert_status_flags.h

 // 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.
 
 #ifndef NET_BASE_CERT_STATUS_FLAGS_H_
 #define NET_BASE_CERT_STATUS_FLAGS_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "net/base/net_export.h"
@@ skipping 14 matching lines @@
 static const CertStatus CERT_STATUS_DATE_INVALID               = 1 << 1;
 static const CertStatus CERT_STATUS_AUTHORITY_INVALID          = 1 << 2;
 // 1 << 3 is reserved for ERR_CERT_CONTAINS_ERRORS (not useful with WinHTTP).
 static const CertStatus CERT_STATUS_NO_REVOCATION_MECHANISM    = 1 << 4;
 static const CertStatus CERT_STATUS_UNABLE_TO_CHECK_REVOCATION = 1 << 5;
 static const CertStatus CERT_STATUS_REVOKED                    = 1 << 6;
 static const CertStatus CERT_STATUS_INVALID                    = 1 << 7;
 static const CertStatus CERT_STATUS_WEAK_SIGNATURE_ALGORITHM   = 1 << 8;
 static const CertStatus CERT_STATUS_NOT_IN_DNS                 = 1 << 9;
 static const CertStatus CERT_STATUS_NON_UNIQUE_NAME            = 1 << 10;
+static const CertStatus CERT_STATUS_WEAK_KEY                   = 1 << 11;
 
 // Bits 16 to 31 are for non-error statuses.
 static const CertStatus CERT_STATUS_IS_EV                      = 1 << 16;
 static const CertStatus CERT_STATUS_REV_CHECKING_ENABLED       = 1 << 17;
 static const CertStatus CERT_STATUS_IS_DNSSEC                  = 1 << 18;
 
 // Returns true if the specified cert status has an error set.
 static inline bool IsCertStatusError(CertStatus status) {
   return (CERT_STATUS_ALL_ERRORS & status) != 0;
 }
 
 // IsCertStatusMinorError returns true iff |cert_status| indicates a condition
 // that should typically be ignored by automated requests. (i.e. a revocation
 // check failure.)
 NET_EXPORT bool IsCertStatusMinorError(CertStatus cert_status);
 
 // Maps a network error code to the equivalent certificate status flag.  If
 // the error code is not a certificate error, it is mapped to 0.
 CertStatus MapNetErrorToCertStatus(int error);
 
 // Maps the most serious certificate error in the certificate status flags
 // to the equivalent network error code.
 NET_EXPORT int MapCertStatusToNetError(CertStatus cert_status);
 
 }  // namespace net
 
 #endif  // NET_BASE_CERT_STATUS_FLAGS_H_