| 49 | } |
| 50 | |
| 51 | void CCM_Base::UncheckedSpecifyDataLengths(lword headerLength, lword messageLength, lword /*footerLength*/) |
| 52 | { |
| 53 | if (m_state != State_IVSet) |
| 54 | throw BadState(AlgorithmName(), "SpecifyDataLengths", "or after State_IVSet"); |
| 55 | |
| 56 | m_aadLength = headerLength; |
| 57 | m_messageLength = messageLength; |
| 58 | |
| 59 | byte *cbcBuffer = CBC_Buffer(); |
| 60 | const BlockCipher &cipher = GetBlockCipher(); |
| 61 | |
| 62 | cbcBuffer[0] = byte(64*(headerLength>0) + 8*((m_digestSize-2)/2) + (m_L-1)); // flag |
| 63 | PutWord<word64>(true, BIG_ENDIAN_ORDER, cbcBuffer+REQUIRED_BLOCKSIZE-8, m_messageLength); |
| 64 | memcpy(cbcBuffer+1, m_buffer+1, REQUIRED_BLOCKSIZE-1-m_L); |
| 65 | cipher.ProcessBlock(cbcBuffer); |
| 66 | |
| 67 | if (headerLength>0) |
| 68 | { |
| 69 | CRYPTOPP_ASSERT(m_bufferedDataLength == 0); |
| 70 | |
| 71 | if (headerLength < ((1<<16) - (1<<8))) |
| 72 | { |
| 73 | PutWord<word16>(true, BIG_ENDIAN_ORDER, m_buffer, (word16)headerLength); |
| 74 | m_bufferedDataLength = 2; |
| 75 | } |
| 76 | else if (headerLength < (W64LIT(1)<<32)) |
| 77 | { |
| 78 | m_buffer[0] = 0xff; |
| 79 | m_buffer[1] = 0xfe; |
| 80 | PutWord<word32>(false, BIG_ENDIAN_ORDER, m_buffer+2, (word32)headerLength); |
| 81 | m_bufferedDataLength = 6; |
| 82 | } |
| 83 | else |
| 84 | { |
| 85 | m_buffer[0] = 0xff; |
| 86 | m_buffer[1] = 0xff; |
| 87 | PutWord<word64>(false, BIG_ENDIAN_ORDER, m_buffer+2, headerLength); |
| 88 | m_bufferedDataLength = 10; |
| 89 | } |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | size_t CCM_Base::AuthenticateBlocks(const byte *data, size_t len) |
| 94 | { |
nothing calls this directly
no test coverage detected