| 45 | } |
| 46 | |
| 47 | bool SivContext::SetKey(const unsigned char *key, int keylen, bool hkdf, CryptConfig *pConfig) |
| 48 | { |
| 49 | if (keylen != 32) |
| 50 | return false; |
| 51 | |
| 52 | if (!pConfig) |
| 53 | throw std::exception("SivContext::SetKey where is my config?"); |
| 54 | |
| 55 | if (!m_pKeys) |
| 56 | m_pKeys = new LockZeroBuffer<AES_KEY>(4, true); |
| 57 | |
| 58 | pConfig->m_keybuf_manager.RegisterBuf(m_pKeys); |
| 59 | |
| 60 | LockZeroBuffer<BYTE> key64(64, true); |
| 61 | |
| 62 | if (hkdf) { |
| 63 | if (!hkdfDerive(key, keylen, key64.m_buf, key64.m_len, hkdfInfoSIVContent)) |
| 64 | return false; |
| 65 | } else { |
| 66 | if (!sha512(key, 32, key64.m_buf)) |
| 67 | return false; |
| 68 | } |
| 69 | |
| 70 | AES::initialize_keys(key64.m_buf, 256, &m_pKeys->m_buf[SIV_KEY_ENCRYPT_LOW_INDEX], |
| 71 | &m_pKeys->m_buf[SIV_KEY_DECRYPT_LOW_INDEX]); |
| 72 | |
| 73 | AES::initialize_keys(key64.m_buf + 32 , 256, &m_pKeys->m_buf[SIV_KEY_ENCRYPT_HIGH_INDEX], |
| 74 | &m_pKeys->m_buf[SIV_KEY_DECRYPT_HIGH_INDEX]); |
| 75 | |
| 76 | return true; |
| 77 | } |
no test coverage detected