37f8b28dc8
git-svn-id: svn://10.0.0.236/branches/ZAP_20050610_BRANCH@193383 18797224-902f-48f8-a5cc-f745e15eee43
119 lines
3.9 KiB
C++
119 lines
3.9 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Mozilla SIP client project.
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*
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* The Initial Developer of the Original Code is 8x8 Inc.
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* Portions created by the Initial Developer are Copyright (C) 2006
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Alex Fritze <alex@croczilla.com> (original author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "zapCryptoUtils.h"
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#include "nsIServiceManager.h"
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#include "nsICryptoHash.h"
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#include "nsString.h"
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////////////////////////////////////////////////////////////////////////
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// zapCryptoUtils
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zapCryptoUtils::zapCryptoUtils()
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{
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}
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zapCryptoUtils::~zapCryptoUtils()
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{
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}
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//----------------------------------------------------------------------
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// nsISupports methods:
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NS_IMPL_THREADSAFE_ADDREF(zapCryptoUtils)
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NS_IMPL_THREADSAFE_RELEASE(zapCryptoUtils)
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NS_INTERFACE_MAP_BEGIN(zapCryptoUtils)
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, zapICryptoUtils)
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NS_INTERFACE_MAP_ENTRY(zapICryptoUtils)
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NS_INTERFACE_MAP_END
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//----------------------------------------------------------------------
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// zapICryptoUtils methods:
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/* ACString computeSHA1HMAC(in ACString text, in ACString key); */
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NS_IMETHODIMP
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zapCryptoUtils::ComputeSHA1HMAC(const nsACString & text,
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const nsACString & key,
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nsACString & retval)
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{
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nsCOMPtr<nsICryptoHash> hash = do_CreateInstance("@mozilla.org/security/hash;1");
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nsCString K;
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// if key is longer than 64, hash it first:
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int key_length = key.Length();
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if (key_length > 64) {
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hash->Init(nsICryptoHash::SHA1);
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hash->Update((PRUint8*)PromiseFlatCString(key).get(), key_length);
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hash->Finish(PR_FALSE, K);
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key_length = 20;
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}
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else {
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K = key;
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}
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// pad K with zero bytes to 64 byte length:
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if (key_length < 64) {
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K.SetLength(64);
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memset(K.BeginWriting() + key_length, 0, 64 - key_length);
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}
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// inner = bitwise XOR key with 0x36 0x36 ... 0x36 (64 bytes)
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// outer = bitwise XOR key with 0x5C 0x5C ... 0X5C (64 bytes)
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PRUint8 inner[65], outer[65];
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PRUint8 *pK = (PRUint8*)K.BeginWriting();
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for (int i=0; i<64; ++i) {
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inner[i] = pK[i] ^ 0x36;
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outer[i] = pK[i] ^ 0x5c;
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}
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// hash (inner CONCAT text)
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nsCString Hinner;
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hash->Init(nsICryptoHash::SHA1);
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hash->Update(inner, 64);
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hash->Update((PRUint8*)PromiseFlatCString(text).get(), text.Length());
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hash->Finish(PR_FALSE, Hinner);
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// hash (outer CONCAT Hinner)
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hash->Init(nsICryptoHash::SHA1);
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hash->Update(outer, 64);
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hash->Update((PRUint8*)Hinner.get(), 20);
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hash->Finish(PR_FALSE, retval);
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return NS_OK;
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}
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