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#include "command.hh"
#include "shared.hh"
#include "store-api.hh"
#include "sync.hh"
#include "thread-pool.hh"
#include "references.hh"
#include <atomic>
using namespace nix;
struct CmdVerify : StorePathsCommand
{
bool noContents = false;
bool noTrust = false;
Strings substituterUris;
size_t sigsNeeded = 0;
CmdVerify()
{
mkFlag(0, "no-contents", "do not verify the contents of each store path", &noContents);
mkFlag(0, "no-trust", "do not verify whether each store path is trusted", &noTrust);
addFlag({
.longName = "substituter",
.shortName = 's',
.description = "use signatures from specified store",
.labels = {"store-uri"},
.handler = {[&](std::string s) { substituterUris.push_back(s); }}
});
mkIntFlag('n', "sigs-needed", "require that each path has at least N valid signatures", &sigsNeeded);
}
std::string description() override
{
return "verify the integrity of store paths";
}
Examples examples() override
{
return {
Example{
"To verify the entire Nix store:",
"nix verify --all"
},
Example{
"To check whether each path in the closure of Firefox has at least 2 signatures:",
"nix verify -r -n2 --no-contents $(type -p firefox)"
},
};
}
Category category() override { return catSecondary; }
void run(ref<Store> store, StorePaths storePaths) override
{
std::vector<ref<Store>> substituters;
for (auto & s : substituterUris)
substituters.push_back(openStore(s));
auto publicKeys = getDefaultPublicKeys();
Activity act(*logger, actVerifyPaths);
std::atomic<size_t> done{0};
std::atomic<size_t> untrusted{0};
std::atomic<size_t> corrupted{0};
std::atomic<size_t> failed{0};
std::atomic<size_t> active{0};
auto update = [&]() {
act.progress(done, storePaths.size(), active, failed);
};
ThreadPool pool;
auto doPath = [&](const Path & storePath) {
try {
checkInterrupt();
Activity act2(*logger, lvlInfo, actUnknown, fmt("checking '%s'", storePath));
MaintainCount<std::atomic<size_t>> mcActive(active);
update();
auto info = store->queryPathInfo(store->parseStorePath(storePath));
if (!noContents) {
std::unique_ptr<AbstractHashSink> hashSink;
if (info->ca == "")
hashSink = std::make_unique<HashSink>(info->narHash.type);
else
hashSink = std::make_unique<HashModuloSink>(info->narHash.type, storePathToHash(store->printStorePath(info->path)));
store->narFromPath(info->path, *hashSink);
auto hash = hashSink->finish();
if (hash.first != info->narHash) {
corrupted++;
act2.result(resCorruptedPath, store->printStorePath(info->path));
logError({
.name = "Hash error - path modified",
.hint = hintfmt(
"path '%s' was modified! expected hash '%s', got '%s'",
store->printStorePath(info->path),
info->narHash.to_string(Base32, true),
hash.first.to_string(Base32, true))
});
}
}
if (!noTrust) {
bool good = false;
if (info->ultimate && !sigsNeeded)
good = true;
else {
StringSet sigsSeen;
size_t actualSigsNeeded = std::max(sigsNeeded, (size_t) 1);
size_t validSigs = 0;
auto doSigs = [&](StringSet sigs) {
for (auto sig : sigs) {
if (!sigsSeen.insert(sig).second) continue;
if (validSigs < ValidPathInfo::maxSigs && info->checkSignature(*store, publicKeys, sig))
validSigs++;
}
};
if (info->isContentAddressed(*store)) validSigs = ValidPathInfo::maxSigs;
doSigs(info->sigs);
for (auto & store2 : substituters) {
if (validSigs >= actualSigsNeeded) break;
try {
auto info2 = store2->queryPathInfo(info->path);
if (info2->isContentAddressed(*store)) validSigs = ValidPathInfo::maxSigs;
doSigs(info2->sigs);
} catch (InvalidPath &) {
} catch (Error & e) {
logError(e.info());
}
}
if (validSigs >= actualSigsNeeded)
good = true;
}
if (!good) {
untrusted++;
act2.result(resUntrustedPath, store->printStorePath(info->path));
logError({
.name = "Untrusted path",
.hint = hintfmt("path '%s' is untrusted",
store->printStorePath(info->path))
});
}
}
done++;
} catch (Error & e) {
logError(e.info());
failed++;
}
update();
};
for (auto & storePath : storePaths)
pool.enqueue(std::bind(doPath, store->printStorePath(storePath)));
pool.process();
throw Exit(
(corrupted ? 1 : 0) |
(untrusted ? 2 : 0) |
(failed ? 4 : 0));
}
};
static auto r1 = registerCommand<CmdVerify>("verify");
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