get public share methods also return the share password now

For some alternative public share authentication methods we need to be able to access the public share password. Some more details are documented here: cs3org#110

cs3/sharing/link/v1beta1/link_api.proto

@@ -39,6 +39,10 @@ import "cs3/types/v1beta1/types.proto";
 // The Public Share Provider API is meant to manipulate public shares
 // also called public links.
 //
+// Access to public shares can be limitted by a password. The share
+// provider must store this password in a secure manner e.g. hashed
+// with the bcrypt algorithm.
+//
 // The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL
 // NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED",  "MAY", and
 // "OPTIONAL" in this document are to be interpreted as described in
@@ -220,6 +224,9 @@ message GetPublicShareResponse {
   // REQUIRED.
   // The share.
   PublicShare share = 3;
+  // OPTIONAL.
+  // The share password hash.
+  string password_hash = 4;
 }
 
 message GetPublicShareByTokenRequest {
@@ -244,4 +251,7 @@ message GetPublicShareByTokenResponse {
   // REQUIRED.
   // The share.
   PublicShare share = 3;
+  // OPTIONAL.
+  // The share password hash.
+  string password_hash = 4;
 }

docs/index.html

@@ -8519,6 +8519,14 @@ <h3 id="cs3.sharing.link.v1beta1.GetPublicShareByTokenResponse">GetPublicShareBy
 The share. </p></td>
                 </tr>
 
+                <tr>
+                  <td>password_hash</td>
+                  <td><a href="#string">string</a></td>
+                  <td></td>
+                  <td><p>OPTIONAL.
+The share password hash. </p></td>
+                </tr>
+
             </tbody>
           </table>
 
@@ -8593,6 +8601,14 @@ <h3 id="cs3.sharing.link.v1beta1.GetPublicShareResponse">GetPublicShareResponse<
 The share. </p></td>
                 </tr>
 
+                <tr>
+                  <td>password_hash</td>
+                  <td><a href="#string">string</a></td>
+                  <td></td>
+                  <td><p>OPTIONAL.
+The share password hash. </p></td>
+                </tr>
+
             </tbody>
           </table>
 
@@ -8994,7 +9010,7 @@ <h3 id="cs3.sharing.link.v1beta1.UpdatePublicShareRequest.Update.Type">UpdatePub
 
 
         <h3 id="cs3.sharing.link.v1beta1.LinkAPI">LinkAPI</h3>
-        <p>PublicShare Provider API</p><p>The Public Share Provider API is meant to manipulate public shares</p><p>also called public links.</p><p>The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL</p><p>NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED",  "MAY", and</p><p>"OPTIONAL" in this document are to be interpreted as described in</p><p>RFC 2119.</p><p>The following are global requirements that apply to all methods:</p><p>Any method MUST return CODE_OK on a succesful operation.</p><p>Any method MAY return NOT_IMPLEMENTED.</p><p>Any method MAY return INTERNAL.</p><p>Any method MAY return UNKNOWN.</p><p>Any method MAY return UNAUTHENTICATED.</p>
+        <p>PublicShare Provider API</p><p>The Public Share Provider API is meant to manipulate public shares</p><p>also called public links.</p><p>Access to public shares can be limitted by a password. The share</p><p>provider must store this password in a secure manner e.g. hashed</p><p>with the bcrypt algorithm.</p><p>The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL</p><p>NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED",  "MAY", and</p><p>"OPTIONAL" in this document are to be interpreted as described in</p><p>RFC 2119.</p><p>The following are global requirements that apply to all methods:</p><p>Any method MUST return CODE_OK on a succesful operation.</p><p>Any method MAY return NOT_IMPLEMENTED.</p><p>Any method MAY return INTERNAL.</p><p>Any method MAY return UNKNOWN.</p><p>Any method MAY return UNAUTHENTICATED.</p>
         <table class="enum-table">
           <thead>
             <tr><td>Method Name</td><td>Request Type</td><td>Response Type</td><td>Description</td></tr>