1 files changed, 55 insertions, 0 deletions

diff --git a/src/mbedTLS++/AesCfb128Encryptor.cpp b/src/mbedTLS++/AesCfb128Encryptor.cpp
new file mode 100644
index 000000000..11582fc19
--- /dev/null
+++ b/src/mbedTLS++/AesCfb128Encryptor.cpp
@@ -0,0 +1,55 @@
+
+// AesCfb128Encryptor.cpp
+
+// Implements the cAesCfb128Encryptor class encrypting data using AES CFB-128
+
+#include "Globals.h"
+#include "AesCfb128Encryptor.h"
+
+
+
+
+
+cAesCfb128Encryptor::cAesCfb128Encryptor(void):
+	m_IsValid(false)
+{
+	mbedtls_aes_init(&m_Aes);
+}
+
+
+
+
+
+cAesCfb128Encryptor::~cAesCfb128Encryptor()
+{
+	// Clear the leftover in-memory data, so that they can't be accessed by a backdoor
+	mbedtls_aes_free(&m_Aes);
+}
+
+
+
+
+
+void cAesCfb128Encryptor::Init(const Byte a_Key[16], const Byte a_IV[16])
+{
+	ASSERT(!IsValid());  // Cannot Init twice
+
+	memcpy(m_IV, a_IV, 16);
+	mbedtls_aes_setkey_enc(&m_Aes, a_Key, 128);
+	m_IsValid = true;
+}
+
+
+
+
+
+void cAesCfb128Encryptor::ProcessData(Byte * a_EncryptedOut, const Byte * a_PlainIn, size_t a_Length)
+{
+	ASSERT(IsValid());  // Must Init() first
+	mbedtls_aes_crypt_cfb8(&m_Aes, MBEDTLS_AES_ENCRYPT, a_Length, m_IV, a_PlainIn, a_EncryptedOut);
+}
+
+
+
+
+