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Merge pull request #2155 from ethereum/guard-readcallback

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Guard ReadFileCallback exceptions
This commit is contained in:
chriseth 2017-04-24 12:28:03 +02:00 committed by GitHub
commit a9f4215720
3 changed files with 36 additions and 23 deletions
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3
libsolidity/interface/CompilerStack.h
View File

@ -79,7 +79,8 @@ class CompilerStack: boost::noncopyable
{
public:
/// Creates a new compiler stack.
/// @param _readFile callback to used to read files for import statements. Should return
/// @param _readFile callback to used to read files for import statements. Must return
/// and must not emit exceptions.
explicit CompilerStack(ReadFile::Callback const& _readFile = ReadFile::Callback());
/// Sets path remappings in the format "context:prefix=target"

3
libsolidity/interface/StandardCompiler.h
View File

@ -38,7 +38,8 @@ class StandardCompiler: boost::noncopyable
{
public:
/// Creates a new StandardCompiler.
/// @param _readFile callback to used to read files for import statements. Should return
/// @param _readFile callback to used to read files for import statements. Must return
/// and must not emit exceptions.
StandardCompiler(ReadFile::Callback const& _readFile = ReadFile::Callback())
: m_compilerStack(_readFile), m_readFile(_readFile)
{

53
solc/CommandLineInterface.cpp
View File

@ -618,32 +618,43 @@ bool CommandLineInterface::processInput()
{
ReadFile::Callback fileReader = [this](string const& _path)
{
auto path = boost::filesystem::path(_path);
auto canonicalPath = boost::filesystem::canonical(path);
bool isAllowed = false;
for (auto const& allowedDir: m_allowedDirectories)
try
{
// If dir is a prefix of boostPath, we are fine.
if (
std::distance(allowedDir.begin(), allowedDir.end()) <= std::distance(canonicalPath.begin(), canonicalPath.end()) &&
std::equal(allowedDir.begin(), allowedDir.end(), canonicalPath.begin())
)
auto path = boost::filesystem::path(_path);
auto canonicalPath = boost::filesystem::canonical(path);
bool isAllowed = false;
for (auto const& allowedDir: m_allowedDirectories)
{
isAllowed = true;
break;
// If dir is a prefix of boostPath, we are fine.
if (
std::distance(allowedDir.begin(), allowedDir.end()) <= std::distance(canonicalPath.begin(), canonicalPath.end()) &&
std::equal(allowedDir.begin(), allowedDir.end(), canonicalPath.begin())
)
{
isAllowed = true;
break;
}
}
if (!isAllowed)
return ReadFile::Result{false, "File outside of allowed directories."};
else if (!boost::filesystem::exists(path))
return ReadFile::Result{false, "File not found."};
else if (!boost::filesystem::is_regular_file(canonicalPath))
return ReadFile::Result{false, "Not a valid file."};
else
{
auto contents = dev::contentsString(canonicalPath.string());
m_sourceCodes[path.string()] = contents;
return ReadFile::Result{true, contents};
}
}
if (!isAllowed)
return ReadFile::Result{false, "File outside of allowed directories."};
else if (!boost::filesystem::exists(path))
return ReadFile::Result{false, "File not found."};
else if (!boost::filesystem::is_regular_file(canonicalPath))
return ReadFile::Result{false, "Not a valid file."};
else
catch (Exception const& _exception)
{
auto contents = dev::contentsString(canonicalPath.string());
m_sourceCodes[path.string()] = contents;
return ReadFile::Result{true, contents};
return ReadFile::Result{false, "Exception in read callback: " + boost::diagnostic_information(_exception)};
}
catch (...)
{
return ReadFile::Result{false, "Unknown exception in read callback."};
}
};