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hydra-queue-runner: Support generating a signed binary cache

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This commit is contained in:
Eelco Dolstra 2016-02-16 16:41:42 +01:00
parent 744cee134e
commit 25022bf5fd
3 changed files with 54 additions and 87 deletions
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5
src/hydra-queue-runner/hydra-queue-runner.cc
View file

@ -33,7 +33,10 @@ ref<Store> State::getLocalStore()
ref<Store> State::getDestStore()
{
return make_ref<LocalBinaryCache>(getLocalStore(), "/tmp/binary-cache");
return make_ref<LocalBinaryCache>(getLocalStore(),
"/tmp/binary-cache",
"/home/eelco/Misc/Keys/test.nixos.org/secret",
"/home/eelco/Misc/Keys/test.nixos.org/public");
}

120
src/hydra-queue-runner/local-binary-cache.cc
View file

@ -4,14 +4,30 @@
#include "compression.hh"
#include "derivations.hh"
#include "globals.hh"
#include "nar-info.hh"
#include "worker-protocol.hh"
namespace nix {
LocalBinaryCache::LocalBinaryCache(ref<Store> localStore, const Path & binaryCacheDir)
: localStore(localStore), binaryCacheDir(binaryCacheDir)
LocalBinaryCache::LocalBinaryCache(ref<Store> localStore, const Path & binaryCacheDir,
const Path & secretKeyFile, const Path & publicKeyFile)
: localStore(localStore)
, binaryCacheDir(binaryCacheDir)
{
createDirs(binaryCacheDir + "/nar");
Path cacheInfoFile = binaryCacheDir + "/nix-cache-info";
if (!pathExists(cacheInfoFile))
writeFile(cacheInfoFile, "StoreDir: " + settings.nixStore + "\n");
if (secretKeyFile != "")
secretKey = std::unique_ptr<SecretKey>(new SecretKey(readFile(secretKeyFile)));
if (publicKeyFile != "") {
publicKeys = std::unique_ptr<PublicKeys>(new PublicKeys);
auto key = PublicKey(readFile(publicKeyFile));
publicKeys->emplace(key.name, key);
}
}
Path LocalBinaryCache::narInfoFileFor(const Path & storePath)
@ -36,103 +52,51 @@ void LocalBinaryCache::addToCache(const ValidPathInfo & info,
Path narInfoFile = narInfoFileFor(info.path);
if (pathExists(narInfoFile)) return;
size_t narSize = nar.size();
Hash narHash = hashString(htSHA256, nar);
NarInfo narInfo(info);
if (info.hash.type != htUnknown && info.hash != narHash)
narInfo.narSize = nar.size();
narInfo.narHash = hashString(htSHA256, nar);
if (info.narHash.type != htUnknown && info.narHash != narInfo.narHash)
throw Error(format("refusing to copy corrupted path ‘%1%’ to binary cache") % info.path);
printMsg(lvlTalkative, format("copying path ‘%1%’ (%2% bytes) to binary cache")
% info.path % narSize);
% info.path % info.narSize);
/* Compress the NAR. */
narInfo.compression = "xz";
string narXz = compressXZ(nar);
Hash narXzHash = hashString(htSHA256, narXz);
narInfo.fileHash = hashString(htSHA256, narXz);
narInfo.fileSize = narXz.size();
/* Atomically write the NAR file. */
string narFileRel = "nar/" + printHash32(narXzHash) + ".nar.xz";
Path narFile = binaryCacheDir + "/" + narFileRel;
narInfo.url = "nar/" + printHash32(narInfo.fileHash) + ".nar.xz";
Path narFile = binaryCacheDir + "/" + narInfo.url;
if (!pathExists(narFile)) atomicWrite(narFile, narXz);
/* Atomically write the NAR info file.*/
Strings refs;
for (auto & r : info.references)
refs.push_back(baseNameOf(r));
if (secretKey) narInfo.sign(*secretKey);
std::string narInfo;
narInfo += "StorePath: " + info.path + "\n";
narInfo += "URL: " + narFileRel + "\n";
narInfo += "Compression: xz\n";
narInfo += "FileHash: sha256:" + printHash32(narXzHash) + "\n";
narInfo += "FileSize: " + std::to_string(narXz.size()) + "\n";
narInfo += "NarHash: sha256:" + printHash32(narHash) + "\n";
narInfo += "NarSize: " + std::to_string(narSize) + "\n";
narInfo += "References: " + concatStringsSep(" ", refs) + "\n";
// FIXME: add signature
atomicWrite(narInfoFile, narInfo);
atomicWrite(narInfoFile, narInfo.to_string());
}
LocalBinaryCache::NarInfo LocalBinaryCache::readNarInfo(const Path & storePath)
NarInfo LocalBinaryCache::readNarInfo(const Path & storePath)
{
NarInfo res;
Path narInfoFile = narInfoFileFor(storePath);
if (!pathExists(narInfoFile))
abort();
std::string narInfo = readFile(narInfoFile);
NarInfo narInfo = NarInfo(readFile(narInfoFile), narInfoFile);
assert(narInfo.path == storePath);
auto corrupt = [&]() {
throw Error(format("corrupt NAR info file ‘%1%’") % narInfoFile);
};
size_t pos = 0;
while (pos < narInfo.size()) {
size_t colon = narInfo.find(':', pos);
if (colon == std::string::npos) corrupt();
std::string name(narInfo, pos, colon - pos);
size_t eol = narInfo.find('\n', colon + 2);
if (eol == std::string::npos) corrupt();
std::string value(narInfo, colon + 2, eol - colon - 2);
if (name == "StorePath") {
res.info.path = value;
if (value != storePath) corrupt();
res.info.path = value;
}
else if (name == "References") {
auto refs = tokenizeString<Strings>(value, " ");
if (!res.info.references.empty()) corrupt();
for (auto & r : refs)
res.info.references.insert(settings.nixStore + "/" + r);
}
else if (name == "URL") {
res.narUrl = value;
}
else if (name == "Compression") {
res.compression = value;
if (publicKeys) {
if (!narInfo.checkSignature(*publicKeys))
throw Error(format("invalid signature on NAR info file ‘%1%’") % narInfoFile);
}
pos = eol + 1;
}
if (res.info.path.empty() || res.narUrl.empty()) corrupt();
return res;
return narInfo;
}
bool LocalBinaryCache::isValidPath(const Path & storePath)
{
Path narInfoFile = narInfoFileFor(storePath);
printMsg(lvlDebug, format("checking %1% -> %2%") % storePath % narInfoFile);
return pathExists(narInfoFile);
return pathExists(narInfoFileFor(storePath));
}
void LocalBinaryCache::exportPath(const Path & storePath, bool sign, Sink & sink)
@ -141,7 +105,7 @@ void LocalBinaryCache::exportPath(const Path & storePath, bool sign, Sink & sink
auto res = readNarInfo(storePath);
auto nar = readFile(binaryCacheDir + "/" + res.narUrl);
auto nar = readFile(binaryCacheDir + "/" + res.url);
/* Decompress the NAR. FIXME: would be nice to have the remote
side do this. */
@ -160,7 +124,7 @@ void LocalBinaryCache::exportPath(const Path & storePath, bool sign, Sink & sink
// FIXME: check integrity of NAR.
sink << exportMagic << storePath << res.info.references << res.info.deriver << 0;
sink << exportMagic << storePath << res.references << res.deriver << 0;
}
Paths LocalBinaryCache::importPaths(bool requireSignature, Source & source)
@ -225,7 +189,7 @@ Path LocalBinaryCache::importPath(Source & source)
ValidPathInfo LocalBinaryCache::queryPathInfo(const Path & storePath)
{
return readNarInfo(storePath).info;
return ValidPathInfo(readNarInfo(storePath));
}
void LocalBinaryCache::querySubstitutablePathInfos(const PathSet & paths,

16
src/hydra-queue-runner/local-binary-cache.hh
View file

@ -1,18 +1,25 @@
#pragma once
#include "crypto.hh"
#include "store-api.hh"
namespace nix {
struct NarInfo;
class LocalBinaryCache : public nix::Store
{
private:
ref<Store> localStore;
Path binaryCacheDir;
std::unique_ptr<SecretKey> secretKey;
std::unique_ptr<PublicKeys> publicKeys;
public:
LocalBinaryCache(ref<Store> localStore, const Path & binaryCacheDir);
LocalBinaryCache(ref<Store> localStore, const Path & binaryCacheDir,
const Path & secretKeyFile, const Path & publicKeyFile);
private:
@ -20,13 +27,6 @@ private:
void addToCache(const ValidPathInfo & info, const string & nar);
struct NarInfo
{
ValidPathInfo info;
std::string narUrl;
std::string compression = "none";
};
NarInfo readNarInfo(const Path & storePath);
public: