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#include <atomic>
#include <glog/logging.h>
#include "libmain/shared.hh"
#include "libstore/store-api.hh"
#include "libutil/sync.hh"
#include "libutil/thread-pool.hh"
#include "nix/command.hh"
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);
mkFlag()
.longName("substituter")
.shortName('s')
.labels({"store-uri"})
.description("use signatures from specified store")
.arity(1)
.handler([&](std::vector<std::string> ss) {
substituterUris.push_back(ss[0]);
});
mkIntFlag('n', "sigs-needed",
"require that each path has at least N valid signatures",
&sigsNeeded);
}
std::string name() override { return "verify"; }
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)"},
};
}
void run(ref<Store> store, Paths storePaths) override {
std::vector<ref<Store>> substituters;
for (auto& s : substituterUris) {
substituters.push_back(openStore(s));
}
auto publicKeys = getDefaultPublicKeys();
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};
ThreadPool pool;
auto doPath = [&](const Path& storePath) {
try {
checkInterrupt();
LOG(INFO) << "checking '" << storePath << "'";
MaintainCount<std::atomic<size_t>> mcActive(active);
auto info = store->queryPathInfo(storePath);
if (!noContents) {
HashSink sink(info->narHash.type);
store->narFromPath(info->path, sink);
auto hash = sink.finish();
if (hash.first != info->narHash) {
corrupted++;
LOG(WARNING) << "path '" << info->path
<< "' was modified! expected hash '"
<< info->narHash.to_string() << "', got '"
<< hash.first.to_string() << "'";
}
}
if (!noTrust) {
bool good = false;
if (info->ultimate && (sigsNeeded == 0u)) {
good = true;
} else {
StringSet sigsSeen;
size_t actualSigsNeeded = std::max(sigsNeeded, (size_t)1);
size_t validSigs = 0;
auto doSigs = [&](const StringSet& sigs) {
for (const auto& sig : sigs) {
if (sigsSeen.count(sig) != 0u) {
continue;
}
sigsSeen.insert(sig);
if (validSigs < ValidPathInfo::maxSigs &&
info->checkSignature(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) {
LOG(ERROR) << e.what();
}
}
if (validSigs >= actualSigsNeeded) {
good = true;
}
}
if (!good) {
untrusted++;
LOG(WARNING) << "path '" << info->path << "' is untrusted";
}
}
done++;
} catch (Error& e) {
LOG(ERROR) << e.what();
failed++;
}
};
for (auto& storePath : storePaths) {
pool.enqueue(std::bind(doPath, storePath));
}
pool.process();
throw Exit((corrupted != 0u ? 1 : 0) | (untrusted != 0u ? 2 : 0) |
(failed != 0u ? 4 : 0));
}
};
static RegisterCommand r1(make_ref<CmdVerify>());
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