Add PK11_ExportDERPrivateKeyInfo and PK11_ExportPrivKeyInfo.

nss/lib/pk11wrap/pk11akey.c

 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 /*
  * This file contains functions to manage asymetric keys, (public and
  * private keys).
  */
 #include "seccomon.h"
 #include "secmod.h"
 #include "secmodi.h"
@@ skipping 1685 matching lines @@
     if(key != NULL) {
         PK11_FreeSymKey(key);
     }
 
     return rv;
 }
 
 SECKEYPrivateKeyInfo *
 PK11_ExportPrivateKeyInfo(CERTCertificate *cert, void *wincx)
 {
-    return NULL;
+    SECKEYPrivateKeyInfo *pki = NULL;
+    SECKEYPrivateKey     *pk  = PK11_FindKeyByAnyCert(cert, wincx);
+    if (pk != NULL) {
+        pki = PK11_ExportPrivKeyInfo(pk, wincx);

[eroman, 2014/03/20 00:12:04]

FYI this looks like it is mixing tabs and spaces. Not sure what the NSS style is

[wtc, 2014/03/22 01:08:00]

You're right. Unfortunately in several directories of the NSS source
tree, such as lib/softoken, lib/pk11wrap, and lib/ssl, tabs are used.
This is a common source of confusion for new NSS contributors. At
some point I should run a tool to convert all those tabs to spaces.

+        SECKEY_DestroyPrivateKey(pk);
+    }
+    return pki;
 }
 
 SECKEYEncryptedPrivateKeyInfo * 
 PK11_ExportEncryptedPrivKeyInfo(
    PK11SlotInfo     *slot,      /* optional, encrypt key in this slot */
    SECOidTag         algTag,    /* encrypt key with this algorithm */
    SECItem          *pwitem,    /* password for PBE encryption */
    SECKEYPrivateKey *pk,        /* encrypt this private key */
    int               iteration, /* interations for PBE alg */
    void             *wincx)     /* context for password callback ? */
@@ skipping 651 matching lines @@
     for (i=0; i < objCount ; i++) {
         SECKEYPrivateKey *privKey = 
                 PK11_MakePrivKey(slot,nullKey,PR_TRUE,key_ids[i],wincx);
         SECKEY_AddPrivateKeyToListTail(keys, privKey);
    }
 
    PORT_Free(key_ids);
    return keys;
 }