--- /dev/null
+/**
+ * KQOAuth - An OAuth authentication library for Qt.
+ *
+ * Author: Johan Paul (johan.paul@d-pointer.com)
+ * http://www.d-pointer.com
+ *
+ * KQOAuth is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * KQOAuth 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with KQOAuth. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <QString>
+#include <QCryptographicHash>
+#include <QByteArray>
+
+#include <QtDebug>
+#include "kqoauthutils.h"
+
+QString KQOAuthUtils::hmac_sha1(const QString &message, const QString &key)
+{
+ QByteArray keyBytes = key.toAscii();
+ int keyLength; // Lenght of key word
+ const int blockSize = 64; // Both MD5 and SHA-1 have a block size of 64.
+
+ keyLength = keyBytes.size();
+ // If key is longer than block size, we need to hash the key
+ if (keyLength > blockSize) {
+ QCryptographicHash hash(QCryptographicHash::Sha1);
+ hash.addData(keyBytes);
+ keyBytes = hash.result();
+ }
+
+ /* http://tools.ietf.org/html/rfc2104 - (1) */
+ // Create the opad and ipad for the hash function.
+ QByteArray ipad;
+ QByteArray opad;
+
+ ipad.fill( 0, blockSize);
+ opad.fill( 0, blockSize);
+
+ ipad.replace(0, keyBytes.length(), keyBytes);
+ opad.replace(0, keyBytes.length(), keyBytes);
+
+ /* http://tools.ietf.org/html/rfc2104 - (2) & (5) */
+ for (int i=0; i<64; i++) {
+ ipad[i] = ipad[i] ^ 0x36;
+ opad[i] = opad[i] ^ 0x5c;
+ }
+
+ QByteArray workArray;
+ workArray.clear();
+
+ workArray.append(ipad, 64);
+ /* http://tools.ietf.org/html/rfc2104 - (3) */
+ workArray.append(message.toAscii());
+
+
+ /* http://tools.ietf.org/html/rfc2104 - (4) */
+ QByteArray sha1 = QCryptographicHash::hash(workArray, QCryptographicHash::Sha1);
+
+ /* http://tools.ietf.org/html/rfc2104 - (6) */
+ workArray.clear();
+ workArray.append(opad, 64);
+ workArray.append(sha1);
+
+ sha1.clear();
+
+ /* http://tools.ietf.org/html/rfc2104 - (7) */
+ sha1 = QCryptographicHash::hash(workArray, QCryptographicHash::Sha1);
+ return QString(sha1.toBase64());
+}