forked from lix-project/lix
Jonas Chevalier
6ee03b8444
This will make it easier to reason about the hash encoding and switch to SRI everywhere where possible.
114 lines
3.2 KiB
C++
114 lines
3.2 KiB
C++
#include "globals.hh"
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#include "nar-info.hh"
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namespace nix {
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NarInfo::NarInfo(const Store & store, const std::string & s, const std::string & whence)
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: ValidPathInfo(StorePath::dummy.clone()) // FIXME: hack
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{
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auto corrupt = [&]() {
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throw Error(format("NAR info file '%1%' is corrupt") % whence);
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};
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auto parseHashField = [&](const string & s) {
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try {
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return Hash(s);
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} catch (BadHash &) {
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corrupt();
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return Hash(); // never reached
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}
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};
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bool havePath = false;
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size_t pos = 0;
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while (pos < s.size()) {
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size_t colon = s.find(':', pos);
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if (colon == std::string::npos) corrupt();
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std::string name(s, pos, colon - pos);
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size_t eol = s.find('\n', colon + 2);
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if (eol == std::string::npos) corrupt();
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std::string value(s, colon + 2, eol - colon - 2);
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if (name == "StorePath") {
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path = store.parseStorePath(value);
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havePath = true;
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}
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else if (name == "URL")
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url = value;
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else if (name == "Compression")
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compression = value;
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else if (name == "FileHash")
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fileHash = parseHashField(value);
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else if (name == "FileSize") {
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if (!string2Int(value, fileSize)) corrupt();
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}
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else if (name == "NarHash")
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narHash = parseHashField(value);
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else if (name == "NarSize") {
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if (!string2Int(value, narSize)) corrupt();
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}
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else if (name == "References") {
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auto refs = tokenizeString<Strings>(value, " ");
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if (!references.empty()) corrupt();
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for (auto & r : refs)
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references.insert(StorePath::fromBaseName(r));
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}
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else if (name == "Deriver") {
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if (value != "unknown-deriver")
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deriver = StorePath::fromBaseName(value);
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}
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else if (name == "System")
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system = value;
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else if (name == "Sig")
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sigs.insert(value);
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else if (name == "CA") {
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if (!ca.empty()) corrupt();
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ca = value;
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}
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pos = eol + 1;
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}
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if (compression == "") compression = "bzip2";
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if (!havePath || url.empty() || narSize == 0 || !narHash) corrupt();
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}
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std::string NarInfo::to_string(const Store & store) const
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{
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std::string res;
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res += "StorePath: " + store.printStorePath(path) + "\n";
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res += "URL: " + url + "\n";
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assert(compression != "");
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res += "Compression: " + compression + "\n";
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assert(fileHash.type == htSHA256);
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res += "FileHash: " + fileHash.to_string(Base32, true) + "\n";
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res += "FileSize: " + std::to_string(fileSize) + "\n";
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assert(narHash.type == htSHA256);
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res += "NarHash: " + narHash.to_string(Base32, true) + "\n";
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res += "NarSize: " + std::to_string(narSize) + "\n";
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res += "References: " + concatStringsSep(" ", shortRefs()) + "\n";
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if (deriver)
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res += "Deriver: " + std::string(deriver->to_string()) + "\n";
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if (!system.empty())
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res += "System: " + system + "\n";
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for (auto sig : sigs)
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res += "Sig: " + sig + "\n";
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if (!ca.empty())
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res += "CA: " + ca + "\n";
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return res;
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}
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}
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