From 89aa32bb1aaee3d8fdc1e767eff7ad0907817c2a Mon Sep 17 00:00:00 2001
From: Jeremy Lainé <jeremy.laine@m4x.org>
Date: Fri, 20 Aug 2010 14:28:58 +0000
Subject: add a method to calculate a Digest MD5

---
 src/QXmppUtils.cpp | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'src/QXmppUtils.cpp')

diff --git a/src/QXmppUtils.cpp b/src/QXmppUtils.cpp
index a6e6de74..d05851db 100644
--- a/src/QXmppUtils.cpp
+++ b/src/QXmppUtils.cpp
@@ -286,6 +286,25 @@ QString unescapeString(const QString& str)
     return strOut;
 }
 
+QByteArray calculateDigestMd5(const QByteArray &a1,
+    const QByteArray &nonce, const QByteArray &nc, const QByteArray &cnonce,
+    const QByteArray &digest_uri, const QByteArray &authzid)
+{
+    QByteArray ha1 = QCryptographicHash::hash(a1, QCryptographicHash::Md5);
+    ha1 += ':' + nonce + ':' + cnonce;
+
+    if (!authzid.isEmpty())
+        ha1 += ':' + authzid;
+
+    QByteArray A1(ha1);
+    QByteArray A2 = "AUTHENTICATE:" + digest_uri;
+    QByteArray HA1 = QCryptographicHash::hash(A1, QCryptographicHash::Md5).toHex();
+    QByteArray HA2 = QCryptographicHash::hash(A2, QCryptographicHash::Md5).toHex();
+    QByteArray KD = HA1 + ':' + nonce + ':' + nc + ':' + cnonce + ':'
+                    + "auth" + ':' + HA2;
+    return QCryptographicHash::hash(KD, QCryptographicHash::Md5).toHex();
+}
+
 QMap<QByteArray, QByteArray> parseDigestMd5(const QByteArray &ba)
 {
     QMap<QByteArray, QByteArray> map;
-- 
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