Import passwords from the ephy/gecko profile on first run.

This feature requires NSS, so NSS is added as an optional dependency,
enabled by default. Can be disabled with --disable-nss, but then
passwords won't be imported.

1 files changed, 259 insertions, 0 deletions

diff --git a/src/ephy-nss-glue.c b/src/ephy-nss-glue.c
new file mode 100644
index 000000000..a5f58cc06
--- /dev/null
+++ b/src/ephy-nss-glue.c
@@ -0,0 +1,259 @@
+/*
+ *  Copyright © 2009 Igalia S.L.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2, or (at your option)
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+/* Portions of this file based on Chromium code.
+ * License block as follows:
+ *
+ * Copyright (c) 2009 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.
+ *
+ * The LICENSE file from Chromium can be found in the LICENSE.chromium
+ * file.
+ */
+
+#include "config.h"
+
+#include "ephy-nss-glue.h"
+
+#include "ephy-file-helpers.h"
+
+#include <nss.h>
+#include <pk11pub.h>
+#include <pk11sdr.h>
+
+static gboolean nss_initialized = FALSE;
+static PK11SlotInfo *db_slot = NULL;
+
+gboolean ephy_nss_glue_init ()
+{
+  char *config_dir, *modspec;
+  SECStatus rv;
+
+  config_dir = g_build_filename (ephy_dot_dir (),
+                                 "mozilla", "epiphany",
+                                 NULL);
+  rv = NSS_Init (config_dir);
+
+  if (rv < 0) {
+    g_free (config_dir);
+    return FALSE;
+  }
+
+  modspec = g_strdup_printf ("configDir='%s' tokenDescription='Firefox NSS database' "
+                             "flags=readOnly", config_dir);
+  db_slot = SECMOD_OpenUserDB (modspec);
+  g_free (config_dir);
+  g_free (modspec);
+
+  if (!db_slot)
+    return FALSE;
+
+  nss_initialized = TRUE;
+
+  return TRUE;
+}
+
+void ephy_nss_glue_close ()
+{
+  if (db_slot) {
+    PK11_FreeSlot (db_slot);
+    db_slot = NULL;
+  }
+
+  NSS_Shutdown ();
+
+  nss_initialized = FALSE;
+}
+
+typedef struct SDRResult
+{
+  SECItem keyid;
+  SECAlgorithmID alg;
+  SECItem data;
+} SDRResult;
+
+static SEC_ASN1Template g_template[] = {
+  { SEC_ASN1_SEQUENCE, 0, NULL, sizeof (SDRResult) },
+  { SEC_ASN1_OCTET_STRING, offsetof(SDRResult, keyid) },
+  { SEC_ASN1_INLINE | SEC_ASN1_XTRN, offsetof(SDRResult, alg),
+    SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
+  { SEC_ASN1_OCTET_STRING, offsetof(SDRResult, data) },
+  { 0 }
+};
+
+static SECStatus
+unpadBlock(SECItem *data, int blockSize, SECItem *result)
+{
+  SECStatus rv = SECSuccess;
+  int padLength;
+  int i;
+
+  result->data = 0;
+  result->len = 0;
+
+  /* Remove the padding from the end if the input data */
+  if (data->len == 0 || data->len % blockSize  != 0) { rv = SECFailure; goto loser; }
+
+  padLength = data->data[data->len-1];
+  if (padLength > blockSize) { rv = SECFailure; goto loser; }
+
+  /* verify padding */
+  for (i=data->len - padLength; (uint32)i < data->len; i++) {
+    if (data->data[i] != padLength) {
+        rv = SECFailure;
+        goto loser;
+    }
+  }
+
+  result->len = data->len - padLength;
+  result->data = (unsigned char *)PORT_Alloc(result->len);
+  if (!result->data) { rv = SECFailure; goto loser; }
+
+  PORT_Memcpy(result->data, data->data, result->len);
+
+  if (padLength < 2) {
+    return SECWouldBlock;
+  }
+
+loser:
+  return rv;
+}
+
+static SECStatus
+pk11Decrypt (PK11SlotInfo *slot, PLArenaPool *arena, 
+             CK_MECHANISM_TYPE type, PK11SymKey *key, 
+             SECItem *params, SECItem *in, SECItem *result)
+{
+  PK11Context *ctx = 0;
+  SECItem paddedResult;
+  SECStatus rv;
+
+  paddedResult.len = 0;
+  paddedResult.data = 0;
+
+  ctx = PK11_CreateContextBySymKey (type, CKA_DECRYPT, key, params);
+  if (!ctx) {
+    rv = SECFailure;
+    goto loser;
+  }
+
+  paddedResult.len = in->len;
+  paddedResult.data = (unsigned char*)PORT_ArenaAlloc (arena, paddedResult.len);
+
+  rv = PK11_CipherOp (ctx, paddedResult.data, 
+                      (int*)&paddedResult.len, paddedResult.len,
+                      in->data, in->len);
+  if (rv != SECSuccess)
+    goto loser;
+
+  PK11_Finalize(ctx);
+
+  /* Remove the padding */
+  rv = unpadBlock (&paddedResult, PK11_GetBlockSize(type, 0), result);
+  if (rv)
+    goto loser;
+
+loser:
+  if (ctx)
+    PK11_DestroyContext (ctx, PR_TRUE);
+
+  return rv;
+}
+
+static SECStatus
+PK11SDR_DecryptWithSlot (PK11SlotInfo *slot, SECItem *data, SECItem *result, void *cx)
+{
+  SECStatus rv = SECSuccess;
+  PK11SymKey *key = NULL;
+  CK_MECHANISM_TYPE type;
+  SDRResult sdrResult;
+  SECItem *params = NULL;
+  SECItem possibleResult = { (SECItemType)0, NULL, 0 };
+  PLArenaPool *arena = NULL;
+
+  arena = PORT_NewArena (SEC_ASN1_DEFAULT_ARENA_SIZE);
+  if (!arena) {
+    rv = SECFailure;
+    goto loser;
+  }
+
+  /* Decode the incoming data */
+  memset (&sdrResult, 0, sizeof sdrResult);
+  rv = SEC_QuickDERDecodeItem (arena, &sdrResult, g_template, data);
+  if (rv != SECSuccess)
+    goto loser; /* Invalid format */
+
+  /* Get the parameter values from the data */
+  params = PK11_ParamFromAlgid (&sdrResult.alg);
+  if (!params) {
+    rv = SECFailure;
+    goto loser;
+  }
+
+  /* Use triple-DES (Should look up the algorithm) */
+  type = CKM_DES3_CBC;
+  key = PK11_FindFixedKey (slot, type, &sdrResult.keyid, cx);
+  if (!key) { 
+    rv = SECFailure;  
+  } else {
+    rv = pk11Decrypt (slot, arena, type, key, params, 
+                      &sdrResult.data, result);
+  }
+
+ loser:
+  if (arena)
+    PORT_FreeArena (arena, PR_TRUE);
+
+  if (key)
+    PK11_FreeSymKey(key);
+
+  if (params)
+    SECITEM_ZfreeItem(params, PR_TRUE);
+
+  if (possibleResult.data)
+    SECITEM_ZfreeItem(&possibleResult, PR_FALSE);
+
+  return rv;
+}
+
+char * ephy_nss_glue_decrypt (const unsigned char *data, gsize length)
+{
+  char *plain = NULL;
+  SECItem request, reply;
+  SECStatus result;
+
+  result = PK11_Authenticate (db_slot, PR_TRUE, NULL);
+  if (result != SECSuccess)
+    return NULL;
+
+  request.data = (unsigned char*)data;
+  request.len = length;
+  reply.data = NULL;
+  reply.len = 0;
+
+  result = PK11SDR_DecryptWithSlot (db_slot, &request, &reply, NULL);
+  if (result == SECSuccess)
+    plain = g_strndup ((const char*)reply.data, reply.len);
+
+  SECITEM_FreeItem (&reply, PR_FALSE);
+
+  return plain;
+}
+