Check whether or not a certificate is self-signed.

net/cert/x509_certificate.h

 // 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.
 
 #ifndef NET_CERT_X509_CERTIFICATE_H_
 #define NET_CERT_X509_CERTIFICATE_H_
 
 #include <string.h>
 
 #include <string>
@@ skipping 403 matching lines @@
   static SHA256HashValue CalculateCAFingerprint256(
       const OSCertHandles& intermediates);
 
   // Calculates the SHA-256 fingerprint for the complete chain, including the
   // leaf certificate and all intermediate CA certificates. Returns an empty
   // (all zero) fingerprint on failure.
   static SHA256HashValue CalculateChainFingerprint256(
       OSCertHandle leaf,
       const OSCertHandles& intermediates);
 
+  // Returns true if the certificate is self-signed.
+  static bool IsSelfSigned(OSCertHandle cert_handle);
+
  private:
   friend class base::RefCountedThreadSafe<X509Certificate>;
   friend class TestRootCerts;  // For unit tests
 
   FRIEND_TEST_ALL_PREFIXES(X509CertificateNameVerifyTest, VerifyHostname);
   FRIEND_TEST_ALL_PREFIXES(X509CertificateTest, SerialNumbers);
 
   // Construct an X509Certificate from a handle to the certificate object
   // in the underlying crypto library.
   X509Certificate(OSCertHandle cert_handle,
@@ skipping 76 matching lines @@
   // based on the type of the certificate.
   std::string default_nickname_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(X509Certificate);
 };
 
 }  // namespace net
 
 #endif  // NET_CERT_X509_CERTIFICATE_H_