- Added generic cipher wrapper for integration with OpenVPN (donated by Fox-IT)
diff --git a/include/polarssl/des.h b/include/polarssl/des.h
index 53bbbff..f9778df 100644
--- a/include/polarssl/des.h
+++ b/include/polarssl/des.h
@@ -61,48 +61,60 @@
*
* \param ctx DES context to be initialized
* \param key 8-byte secret key
+ *
+ * \return 0
*/
-void des_setkey_enc( des_context *ctx, const unsigned char key[8] );
+int des_setkey_enc( des_context *ctx, const unsigned char key[8] );
/**
* \brief DES key schedule (56-bit, decryption)
*
* \param ctx DES context to be initialized
* \param key 8-byte secret key
+ *
+ * \return 0
*/
-void des_setkey_dec( des_context *ctx, const unsigned char key[8] );
+int des_setkey_dec( des_context *ctx, const unsigned char key[8] );
/**
* \brief Triple-DES key schedule (112-bit, encryption)
*
* \param ctx 3DES context to be initialized
* \param key 16-byte secret key
+ *
+ * \return 0
*/
-void des3_set2key_enc( des3_context *ctx, const unsigned char key[16] );
+int des3_set2key_enc( des3_context *ctx, const unsigned char key[16] );
/**
* \brief Triple-DES key schedule (112-bit, decryption)
*
* \param ctx 3DES context to be initialized
* \param key 16-byte secret key
+ *
+ * \return 0
*/
-void des3_set2key_dec( des3_context *ctx, const unsigned char key[16] );
+int des3_set2key_dec( des3_context *ctx, const unsigned char key[16] );
/**
* \brief Triple-DES key schedule (168-bit, encryption)
*
* \param ctx 3DES context to be initialized
* \param key 24-byte secret key
+ *
+ * \return 0
*/
-void des3_set3key_enc( des3_context *ctx, const unsigned char key[24] );
+int des3_set3key_enc( des3_context *ctx, const unsigned char key[24] );
/**
* \brief Triple-DES key schedule (168-bit, decryption)
*
* \param ctx 3DES context to be initialized
* \param key 24-byte secret key
+ *
+ * \return 0
*/
-void des3_set3key_dec( des3_context *ctx, const unsigned char key[24] );
+int des3_set3key_dec( des3_context *ctx, const unsigned char key[24] );
/**
* \brief DES-ECB block encryption/decryption