Fix WiFi config view for previously configured client cert.

chromeos/network/client_cert_util.cc

Index: chromeos/network/client_cert_util.cc
diff --git a/chromeos/network/client_cert_util.cc b/chromeos/network/client_cert_util.cc
index 57eb4fda1de14cf3679185df5fd83f1fd98150bb..4957e0e5c808d1eef1f55a3636bca0e402a9c38e 100644
--- a/chromeos/network/client_cert_util.cc
+++ b/chromeos/network/client_cert_util.cc
@@ -218,6 +218,22 @@ scoped_refptr<net::X509Certificate> GetCertificateMatch(
   return latest;
 }
 
+std::string GetPkcs11IdFromEapCertId(const std::string& cert_id) {
+  if (cert_id.empty())
+    return std::string();
+
+  size_t delimiter_pos = cert_id.find(':');
+  if (delimiter_pos == std::string::npos) {
+    // No delimiter found, so |cert_id| only contains the PKCS11 id.
+    return cert_id;
+  }
+  if (delimiter_pos + 1 >= cert_id.size()) {
+    LOG(ERROR) << "Empty PKCS11 id in cert id.";
+    return std::string();
+  }
+  return cert_id.substr(delimiter_pos + 1);
+}
+
 void SetShillProperties(const ConfigType cert_config_type,
                         const std::string& tpm_slot,
                         const std::string& tpm_pin,