108 	// we need some pieces of the header down below
112 	// write plaintext header
114 		// write header
119 		// update CBC-MAC over image header
139 			// write header for this section
329 void EncoreBootImage::prepareImageHeader(boot_image_header_t & header)
339 	// fill in header fields
340 	header.m_signature[0] = 'S';
341 	header.m_signature[1] = 'T';
342 	header.m_signature[2] = 'M';
343 	header.m_signature[3] = 'P';
344 	header.m_majorVersion = ROM_BOOT_IMAGE_MAJOR_VERSION;
345 	header.m_minorVersion = ROM_BOOT_IMAGE_MINOR_VERSION;
346 	header.m_flags = ENDIAN_HOST_TO_LITTLE_U16(m_headerFlags);
347 	header.m_imageBlocks = ENDIAN_HOST_TO_LITTLE_U32(getImageSize());
348 	header.m_firstBootableSectionID = ENDIAN_HOST_TO_LITTLE_U32(firstBootSectionID);
349 	header.m_keyCount = ENDIAN_HOST_TO_LITTLE_U16((uint16_t)m_keys.size());
350 	header.m_headerBlocks = ENDIAN_HOST_TO_LITTLE_U16((uint16_t)numberOfCipherBlocks(sizeof(header)));
351 	header.m_sectionCount = ENDIAN_HOST_TO_LITTLE_U16((uint16_t)m_sections.size());
352 	header.m_sectionHeaderSize = ENDIAN_HOST_TO_LITTLE_U16((uint16_t)numberOfCipherBlocks(sizeof(section_header_t)));
353 	header.m_signature2[0] = 's';
354 	header.m_signature2[1] = 'g';
355 	header.m_signature2[2] = 't';
356 	header.m_signature2[3] = 'l';
357 	header.m_timestamp = ENDIAN_HOST_TO_LITTLE_U64(getTimestamp());
358 	header.m_driveTag = m_driveTag;
361 	header.m_productVersion = m_productVersion;
362 	header.m_componentVersion = m_componentVersion;
363 	header.m_productVersion.fixByteOrder();
364 	header.m_componentVersion.fixByteOrder();
367 	header.m_keyDictionaryBlock = ENDIAN_HOST_TO_LITTLE_U16(header.m_headerBlocks + header.m_sectionCount * header.m_sectionHeaderSize);
368 	header.m_firstBootTagBlock = ENDIAN_HOST_TO_LITTLE_U32(header.m_keyDictionaryBlock + header.m_keyCount * 2);
372 	rng.generateBlock(header.m_padding0, sizeof(header.m_padding0));
373 	rng.generateBlock(header.m_padding1, sizeof(header.m_padding1));
375 	// compute SHA-1 digest over the image header
376 	uint8_t * message = reinterpret_cast<uint8_t *>(&header.m_signature);
377 	uint32_t length = static_cast<uint32_t>(sizeof(header) - sizeof(header.m_digest)); // include padding
383 	hash.GetHash(header.m_digest);
431 	uint32_t offset = numberOfCipherBlocks(sizeof(boot_image_header_t));	// header
536 	const boot_command_t * header = reinterpret_cast<const boot_command_t *>(blocks);
539     switch (header->m_tag)
573 uint8_t EncoreBootImage::BootCommand::calculateChecksum(const boot_command_t & header)
575 	const uint8_t * bytes = reinterpret_cast<const uint8_t *>(&header);
580 	for (i = 1; i < sizeof(header); ++i)
619 	// handle the command header block separately
624 		boot_command_t header;
625 		fillCommandHeader(header);
626 		memcpy(data, &header, sizeof(header));
641 //! \param modelHeader The baseline header to compare against. Only those fields that
643 //! \param testHeader The actual command header which is being validated.
645 //!		header are compared. Possible values are:
689 //! Since the NOP command has no data, this method just validates the command header.
698 //! \exception std::runtime_error Thrown if header fields are invalid.
702 	const boot_command_t * header = reinterpret_cast<const boot_command_t *>(blocks);
703 	validateHeader(&model, header, CMD_TAG_FIELD | CMD_FLAGS_FIELD | CMD_ADDRESS_FIELD | CMD_COUNT_FIELD | CMD_DATA_FIELD);
708 //! All fields of the boot command header structure are set to 0, except
712 void EncoreBootImage::NopCommand::fillCommandHeader(boot_command_t & header)
714 	header.m_tag = getTag();
715 	header.m_flags = 0;
716 	header.m_address = 0;
717 	header.m_count = 0;
718 	header.m_data = 0;
719 	header.m_checksum = calculateChecksum(header);	// do this last
744 //! \exception std::runtime_error Thrown if header fields are invalid.
748 	const boot_command_t * header = reinterpret_cast<const boot_command_t *>(blocks);
749 	validateHeader(&model, header, CMD_TAG_FIELD);
751     // read fields from header
752 	m_isLast = (ENDIAN_LITTLE_TO_HOST_U16(header->m_flags) & ROM_LAST_TAG) != 0;
753 	m_sectionIdentifier = ENDIAN_LITTLE_TO_HOST_U32(header->m_address);
754 	m_sectionLength = ENDIAN_LITTLE_TO_HOST_U32(header->m_count);
755 	m_sectionFlags = ENDIAN_LITTLE_TO_HOST_U32(header->m_data);
762 void EncoreBootImage::TagCommand::fillCommandHeader(boot_command_t & header)
764 	header.m_tag = getTag();
765 	header.m_flags = ENDIAN_HOST_TO_LITTLE_U16(m_isLast ? ROM_LAST_TAG : 0);
766 	header.m_address = ENDIAN_HOST_TO_LITTLE_U32(m_sectionIdentifier);
767 	header.m_count = ENDIAN_HOST_TO_LITTLE_U32(m_sectionLength);
768 	header.m_data = ENDIAN_HOST_TO_LITTLE_U32(m_sectionFlags);
769 	header.m_checksum = calculateChecksum(header);	// do this last
799 //!     data does not match the CRC stored in the command header. Also thrown if the
801 //!     specified in the command header or if header fields are invalid.
806 	const boot_command_t * header = reinterpret_cast<const boot_command_t *>(blocks);
807 	validateHeader(&model, header, CMD_TAG_FIELD);
809     // read fields from header
810 	m_address = ENDIAN_LITTLE_TO_HOST_U32(header->m_address);
811 	m_length = ENDIAN_LITTLE_TO_HOST_U32(header->m_count);
812     unsigned crc = ENDIAN_LITTLE_TO_HOST_U32(header->m_data);
815 	m_loadDCD = (ENDIAN_LITTLE_TO_HOST_U16(header->m_flags) & ROM_LOAD_DCD) != 0;
843 //! The only thing unique in the load command header is the
846 void EncoreBootImage::LoadCommand::fillCommandHeader(boot_command_t & header)
848 	header.m_tag = getTag();
849 	header.m_flags = ENDIAN_HOST_TO_LITTLE_U16(m_loadDCD ? ROM_LOAD_DCD : 0);
850 	header.m_address = ENDIAN_HOST_TO_LITTLE_U32(m_address);
851 	header.m_count = ENDIAN_HOST_TO_LITTLE_U32(m_length);
852 	header.m_data = ENDIAN_HOST_TO_LITTLE_U32(calculateCRC());
855 	header.m_checksum = calculateChecksum(header);
995 //! \exception std::runtime_error Thrown if header fields are invalid.
1000 	const boot_command_t * header = reinterpret_cast<const boot_command_t *>(blocks);
1001 	validateHeader(&model, header, CMD_TAG_FIELD | CMD_FLAGS_FIELD);
1003     // read fields from header
1004 	m_address = ENDIAN_LITTLE_TO_HOST_U32(header->m_address);
1005 	m_count = ENDIAN_LITTLE_TO_HOST_U32(header->m_count);
1006     m_pattern = ENDIAN_LITTLE_TO_HOST_U32(header->m_data);
1011 void EncoreBootImage::FillCommand::fillCommandHeader(boot_command_t & header)
1013 	header.m_tag = getTag();
1014 	header.m_flags = 0;
1015 	header.m_address = ENDIAN_HOST_TO_LITTLE_U32(m_address);
1016 	header.m_count = ENDIAN_HOST_TO_LITTLE_U32(m_count);
1017 	header.m_data = ENDIAN_HOST_TO_LITTLE_U32(m_pattern);
1018 	header.m_checksum = calculateChecksum(header);	// do this last
1051 //! \exception std::runtime_error Thrown if header fields are invalid.
1056 	const boot_command_t * header = reinterpret_cast<const boot_command_t *>(blocks);
1057 	validateHeader(&model, header, CMD_TAG_FIELD | CMD_FLAGS_FIELD | CMD_ADDRESS_FIELD | CMD_COUNT_FIELD);
1059     // read fields from header
1060     m_mode = ENDIAN_LITTLE_TO_HOST_U32(header->m_data);
1065 void EncoreBootImage::ModeCommand::fillCommandHeader(boot_command_t & header)
1067 	header.m_tag = getTag();
1068 	header.m_flags = 0;
1069 	header.m_address = 0;
1070 	header.m_count = 0;
1071 	header.m_data = ENDIAN_HOST_TO_LITTLE_U32(m_mode);
1072 	header.m_checksum = calculateChecksum(header);	// do this last
1086 //! \exception std::runtime_error Thrown if header fields are invalid.
1091 	const boot_command_t * header = reinterpret_cast<const boot_command_t *>(blocks);
1092 	validateHeader(&model, header, CMD_TAG_FIELD | CMD_COUNT_FIELD);
1094     // read fields from header
1095     m_address = ENDIAN_LITTLE_TO_HOST_U32(header->m_address);
1096     m_argument = ENDIAN_LITTLE_TO_HOST_U32(header->m_data);
1097 	m_isHAB = (ENDIAN_LITTLE_TO_HOST_U16(header->m_flags) & ROM_HAB_EXEC) != 0;
1102 void EncoreBootImage::JumpCommand::fillCommandHeader(boot_command_t & header)
1104 	header.m_tag = getTag();
1105 	header.m_flags = ENDIAN_HOST_TO_LITTLE_U16(m_isHAB ? ROM_HAB_EXEC : 0);
1106 	header.m_address = ENDIAN_HOST_TO_LITTLE_U32(m_address);
1107 	header.m_count = 0;
1108 	header.m_data = ENDIAN_HOST_TO_LITTLE_U32(m_argument);
1109 	header.m_checksum = calculateChecksum(header);	// do this last
1125 void EncoreBootImage::Section::fillSectionHeader(section_header_t & header)
1127 	header.m_tag = getIdentifier();
1128 	header.m_offset = 0;
1129 	header.m_length = ENDIAN_HOST_TO_LITTLE_U32(getBlockCount());
1130 	header.m_flags = ENDIAN_HOST_TO_LITTLE_U32(getFlags());
1135 		header.m_offset = ENDIAN_HOST_TO_LITTLE_U32(m_image->getSectionOffset(this));

Indexes created Thu Aug 15 21:26:39 MDT 2024