1 files changed, 66 insertions, 1 deletions
diff --git a/src/crypt/cryptclassnullcipher.cpp b/src/crypt/cryptclassnullcipher.cpp
index b4ed284..c30b2e2 100644
--- a/src/crypt/cryptclassnullcipher.cpp
+++ b/src/crypt/cryptclassnullcipher.cpp
@@ -3,15 +3,80 @@
 CryptClassNullCipher::CryptClassNullCipher()
     : CryptClassBase()
 {
+    ERR_load_crypto_strings();
+    OpenSSL_add_all_algorithms();
+}
 
+CryptClassNullCipher::~CryptClassNullCipher()
+{
+    EVP_cleanup();
+    ERR_free_strings();
 }
 
 void CryptClassNullCipher::encrypt()
 {
-    m_cryptText = m_clearText;
+    //    int encrypt(unsigned char *plaintext, int plaintext_len, unsigned char *key,
+    //             unsigned char *iv, unsigned char *ciphertext)
+
+    m_cryptText = QByteArray(m_clearText.size() + 50, 0);
+
+    EVP_CIPHER_CTX *ctx;
+
+    int len;
+
+    int ciphertext_len;
+
+    /* Create and initialise the context */
+    if (!(ctx = EVP_CIPHER_CTX_new()))
+    {
+        qDebug() << "EVP_CIPHER_CTX_new";
+        handleErrors();
+    }
+
+    /* Initialise the encryption operation. IMPORTANT - ensure you use a key
+     * and IV size appropriate for your cipher
+     * In this example we are using 256 bit AES (i.e. a 256 bit key). The
+     * IV size for *most* modes is the same as the block size. For AES this
+     * is 128 bits */
+    if (1 != EVP_EncryptInit_ex(ctx, EVP_enc_null(), NULL, NULL, NULL))
+    {
+        qDebug() << "EVP_EncryptInit_ex";
+        handleErrors();
+    }
+
+    /* Provide the message to be encrypted, and obtain the encrypted output.
+     * EVP_EncryptUpdate can be called multiple times if necessary
+     */
+    if (1 != EVP_EncryptUpdate(ctx, (unsigned char *) m_cryptText.data(), &len, (unsigned char *) m_clearText.data(), m_clearText.length()))
+    {
+        qDebug() << "EVP_EncryptUpdate";
+        handleErrors();
+    }
+
+    ciphertext_len = len;
+
+    /* Finalise the encryption. Further ciphertext bytes may be written at
+     * this stage.
+     */
+    if (1 != EVP_EncryptFinal_ex(ctx, (unsigned char *) (m_cryptText.data() + len), &len))
+    {
+        qDebug() << "EVP_EncryptFinal_ex";
+        handleErrors();
+    }
+
+    ciphertext_len += len;
+
+    /* Clean up */
+    EVP_CIPHER_CTX_free(ctx);
 }
 
 void CryptClassNullCipher::decrypt()
 {
     m_clearText = m_cryptText;
 }
+
+void CryptClassNullCipher::handleErrors()
+{
+    qDebug() << ERR_get_error();
+    abort();
+}