diff options
Diffstat (limited to 'src/PolarSSL++/AesCfb128Encryptor.cpp')
-rw-r--r-- | src/PolarSSL++/AesCfb128Encryptor.cpp | 68 |
1 files changed, 0 insertions, 68 deletions
diff --git a/src/PolarSSL++/AesCfb128Encryptor.cpp b/src/PolarSSL++/AesCfb128Encryptor.cpp deleted file mode 100644 index ac0262e69..000000000 --- a/src/PolarSSL++/AesCfb128Encryptor.cpp +++ /dev/null @@ -1,68 +0,0 @@ - -// AesCfb128Encryptor.cpp - -// Implements the cAesCfb128Encryptor class encrypting data using AES CFB-128 - -#include "Globals.h" -#include "AesCfb128Encryptor.h" - - - - - -cAesCfb128Encryptor::cAesCfb128Encryptor(void) : - m_IVOffset(0), - m_IsValid(false) -{ -} - - - - - -cAesCfb128Encryptor::~cAesCfb128Encryptor() -{ - // Clear the leftover in-memory data, so that they can't be accessed by a backdoor - memset(&m_Aes, 0, sizeof(m_Aes)); -} - - - - - -void cAesCfb128Encryptor::Init(const Byte a_Key[16], const Byte a_IV[16]) -{ - ASSERT(!IsValid()); // Cannot Init twice - ASSERT(m_IVOffset == 0); - - memcpy(m_IV, a_IV, 16); - 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 - - // PolarSSL doesn't do AES-CFB8, so we need to implement it ourselves: - for (size_t i = 0; i < a_Length; i++) - { - Byte Buffer[sizeof(m_IV)]; - aes_crypt_ecb(&m_Aes, AES_ENCRYPT, m_IV, Buffer); - for (size_t idx = 0; idx < sizeof(m_IV) - 1; idx++) - { - m_IV[idx] = m_IV[idx + 1]; - } - a_EncryptedOut[i] = a_PlainIn[i] ^ Buffer[0]; - m_IV[sizeof(m_IV) - 1] = a_EncryptedOut[i]; - } -} - - - - - |