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eof: Move type validation outside of header validation #1052

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merged 1 commit into from
Oct 17, 2024
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eof: Move type validation outside of header validation #1052

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24 changes: 6 additions & 18 deletions lib/evmone/eof.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -212,22 +212,11 @@ std::variant<EOFSectionHeaders, EOFValidationError> validate_section_headers(byt
return section_headers;
}

EOFValidationError validate_types(
bytes_view container, size_t type_section_offset, uint16_t type_section_size) noexcept
EOFValidationError validate_types(bytes_view container, const EOF1Header& header) noexcept
{
assert(!container.empty()); // guaranteed by EOF headers validation


// guaranteed by EOF headers validation
assert(type_section_offset + type_section_size < container.size());

const auto num_types = type_section_size / EOF1Header::TYPE_ENTRY_SIZE;
for (size_t i = 0; i < num_types; ++i)
for (size_t i = 0; i < header.get_type_count(); ++i)
{
const auto offset = type_section_offset + (i * EOF1Header::TYPE_ENTRY_SIZE);
const auto inputs = container[offset];
const auto outputs = container[offset + 1];
const auto max_stack_height = read_uint16_be(&container[offset + 2]);
const auto [inputs, outputs, max_stack_height] = header.get_type(container, i);

// First type should be (0, 0x80)
if (i == 0 && (inputs != 0 || outputs != NON_RETURNING_FUNCTION))
Expand Down Expand Up @@ -621,6 +610,9 @@ EOFValidationError validate_eof1(
if (container.size() > static_cast<size_t>(header.data_offset) + header.data_size)
return EOFValidationError::invalid_section_bodies_size;

if (const auto err = validate_types(container, header); err != EOFValidationError::success)
return err;

// Validate code sections
std::vector<bool> visited_code_sections(header.code_sizes.size());
std::queue<uint16_t> code_sections_queue({0});
Expand Down Expand Up @@ -771,10 +763,6 @@ std::variant<EOF1Header, EOFValidationError> validate_header(
if (type_section_size != code_sizes.size() * EOF1Header::TYPE_ENTRY_SIZE)
return EOFValidationError::invalid_type_section_size;

const auto validation_error = validate_types(container, type_section_offset, type_section_size);
if (validation_error != EOFValidationError::success)
return validation_error;

std::vector<uint16_t> code_offsets;
auto offset = header_size + type_section_size;

Expand Down