#include "globals.hh" #include "nar-info.hh" namespace nix { NarInfo::NarInfo(const Store & store, const std::string & s, const std::string & whence) { auto corrupt = [&]() { throw Error(format("NAR info file '%1%' is corrupt") % whence); }; auto parseHashField = [&](const string & s) { try { return Hash(s); } catch (BadHash &) { corrupt(); return Hash(); // never reached } }; size_t pos = 0; while (pos < s.size()) { size_t colon = s.find(':', pos); if (colon == std::string::npos) corrupt(); std::string name(s, pos, colon - pos); size_t eol = s.find('\n', colon + 2); if (eol == std::string::npos) corrupt(); std::string value(s, colon + 2, eol - colon - 2); if (name == "StorePath") { if (!store.isStorePath(value)) corrupt(); path = value; } else if (name == "URL") url = value; else if (name == "Compression") compression = value; else if (name == "FileHash") fileHash = parseHashField(value); else if (name == "FileSize") { if (!string2Int(value, fileSize)) corrupt(); } else if (name == "NarHash") narHash = parseHashField(value); else if (name == "NarSize") { if (!string2Int(value, narSize)) corrupt(); } else if (name == "References") { auto refs = tokenizeString<Strings>(value, " "); if (!references.empty()) corrupt(); for (auto & r : refs) { auto r2 = store.storeDir + "/" + r; if (!store.isStorePath(r2)) corrupt(); references.insert(r2); } } else if (name == "Deriver") { if (value != "unknown-deriver") { auto p = store.storeDir + "/" + value; if (!store.isStorePath(p)) corrupt(); deriver = p; } } else if (name == "System") system = value; else if (name == "Sig") sigs.insert(value); else if (name == "CA") { if (!ca.empty()) corrupt(); ca = value; } pos = eol + 1; } if (compression == "") compression = "bzip2"; if (path.empty() || url.empty() || narSize == 0 || !narHash) corrupt(); } std::string NarInfo::to_string() const { std::string res; res += "StorePath: " + path + "\n"; res += "URL: " + url + "\n"; assert(compression != ""); res += "Compression: " + compression + "\n"; assert(fileHash.type == htSHA256); res += "FileHash: " + fileHash.to_string(Base32) + "\n"; res += "FileSize: " + std::to_string(fileSize) + "\n"; assert(narHash.type == htSHA256); res += "NarHash: " + narHash.to_string(Base32) + "\n"; res += "NarSize: " + std::to_string(narSize) + "\n"; res += "References: " + concatStringsSep(" ", shortRefs()) + "\n"; if (!deriver.empty()) res += "Deriver: " + baseNameOf(deriver) + "\n"; if (!system.empty()) res += "System: " + system + "\n"; for (auto sig : sigs) res += "Sig: " + sig + "\n"; if (!ca.empty()) res += "CA: " + ca + "\n"; return res; } }