Add an ONC property for proactive key caching with documentation.

BUG=475699
TEST=None

Review URL: https://codereview.chromium.org/1085703002

Cr-Commit-Position: refs/heads/master@{#326738}

chromeos/network/onc/onc_signature.cc

@@ -67,6 +67,7 @@ const OncFieldSignature eap_fields[] = {
     {::onc::eap::kServerCARef, &kStringSignature},
     {::onc::eap::kServerCARefs, &kStringListSignature},
     {::onc::eap::kUseSystemCAs, &kBoolSignature},
+    {::onc::eap::kUseProactiveKeyCaching, &kBoolSignature},
     {NULL}};
 
 const OncFieldSignature ipsec_fields[] = {

chromeos/network/onc/onc_translation_tables.cc

@@ -33,6 +33,8 @@ const FieldTranslationEntry eap_fields[] = {
     {::onc::eap::kSaveCredentials, shill::kSaveCredentialsProperty},
     {::onc::eap::kServerCAPEMs, shill::kEapCaCertPemProperty},
     {::onc::eap::kUseSystemCAs, shill::kEapUseSystemCasProperty},
+    {::onc::eap::kUseProactiveKeyCaching,
+     shill::kEapUseProactiveKeyCachingProperty},
     {NULL}};
 
 const FieldTranslationEntry ipsec_fields[] = {

chromeos/test/data/network/shill_wifi_clientcert.json

 {
    "EAP.EAP": "TLS",
    "EAP.Identity": "abc ${LOGIN_ID}@my.domain.com",
+   "EAP.UseProactiveKeyCaching": true,
    "EAP.UseSystemCAs": true,
    "GUID": "{77db0089-0bc8-4358-929c-123xcv}",
    "Mode": "managed",

chromeos/test/data/network/translation_of_shill_wifi_clientcert.onc

@@ -6,6 +6,7 @@
     "EAP": {
       "Identity": "abc ${LOGIN_ID}@my.domain.com",
       "SaveCredentials": true,
+      "UseProactiveKeyCaching": true,
       "UseSystemCAs": true
     },
     "HexSSID":"4F70656E577274", // "OpenWrt"

chromeos/test/data/network/wifi_clientcert_with_cert_pems.onc

@@ -9,6 +9,7 @@
         "EAP": {
             "Outer": "EAP-TLS",
             "Identity": "abc ${LOGIN_ID}@my.domain.com",
+            "UseProactiveKeyCaching": true,
             "UseSystemCAs": true,
             "ClientCertType": "Pattern",
             "ClientCertPattern": {

components/onc/docs/onc_spec.html

@@ -2049,6 +2049,16 @@
       is <span class="value">false</span>, and no <span class="field">ServerCARef</span> is set, the certificate
       must be a self signed certificate, and no CA signature is required.
     </dd>
+
+    <dt class="field">UseProactiveKeyCaching</dt>
+    <dd>
+      <span class="field_meta">
+        (optional, defaults to <span class="value">false</span>)
+        <span class="type">boolean</span>
+      </span>
+      Indicates whether Proactive Key Caching (also known as Opportunistic
+      Key Caching) should be used on a per-service basis.
+    </dd>
   </dl>
 
   <p class="rule">

components/onc/onc_constants.cc

@@ -293,6 +293,7 @@ const char kServerCAPEMs[] = "ServerCAPEMs";
 const char kServerCARef[] = "ServerCARef";
 const char kServerCARefs[] = "ServerCARefs";
 const char kUseSystemCAs[] = "UseSystemCAs";
+const char kUseProactiveKeyCaching[] = "UseProactiveKeyCaching";
 }  // namespace eap
 
 namespace vpn {

components/onc/onc_constants.h

@@ -311,6 +311,7 @@ ONC_EXPORT extern const char kServerCAPEMs[];
 ONC_EXPORT extern const char kServerCARef[];
 ONC_EXPORT extern const char kServerCARefs[];
 ONC_EXPORT extern const char kUseSystemCAs[];
+ONC_EXPORT extern const char kUseProactiveKeyCaching[];
 }  // namespace eap
 
 namespace vpn {