1 files changed, 139 insertions, 0 deletions
diff --git a/src/nix/sigs.cc b/src/nix/sigs.cc
new file mode 100644
index 000000000..9932aa4a9
--- /dev/null
+++ b/src/nix/sigs.cc
@@ -0,0 +1,139 @@
+#include "command.hh"
+#include "shared.hh"
+#include "store-api.hh"
+#include "thread-pool.hh"
+
+#include <atomic>
+
+using namespace nix;
+
+struct CmdCopySigs : StorePathsCommand
+{
+    Strings substituterUris;
+
+    CmdCopySigs()
+    {
+        mkFlag('s', "substituter", {"store-uri"}, "use signatures from specified store", 1,
+            [&](Strings ss) { substituterUris.push_back(ss.front()); });
+    }
+
+    std::string name() override
+    {
+        return "copy-sigs";
+    }
+
+    std::string description() override
+    {
+        return "copy path signatures from substituters (like binary caches)";
+    }
+
+    void run(ref<Store> store, Paths storePaths) override
+    {
+        if (substituterUris.empty())
+            throw UsageError("you must specify at least one substituter using ‘-s’");
+
+        // FIXME: factor out commonality with MixVerify.
+        std::vector<ref<Store>> substituters;
+        for (auto & s : substituterUris)
+            substituters.push_back(openStoreAt(s));
+
+        ThreadPool pool;
+
+        std::string doneLabel = "done";
+        std::atomic<size_t> added{0};
+
+        logger->setExpected(doneLabel, storePaths.size());
+
+        auto doPath = [&](const Path & storePath) {
+            Activity act(*logger, lvlInfo, format("getting signatures for ‘%s’") % storePath);
+
+            checkInterrupt();
+
+            auto info = store->queryPathInfo(storePath);
+
+            StringSet newSigs;
+
+            for (auto & store2 : substituters) {
+                try {
+                    auto info2 = store2->queryPathInfo(storePath);
+
+                    /* Don't import signatures that don't match this
+                       binary. */
+                    if (info->narHash != info2->narHash ||
+                        info->narSize != info2->narSize ||
+                        info->references != info2->references)
+                        continue;
+
+                    for (auto & sig : info2->sigs)
+                        if (!info->sigs.count(sig))
+                            newSigs.insert(sig);
+                } catch (InvalidPath &) {
+                }
+            }
+
+            if (!newSigs.empty()) {
+                store->addSignatures(storePath, newSigs);
+                added += newSigs.size();
+            }
+
+            logger->incProgress(doneLabel);
+        };
+
+        for (auto & storePath : storePaths)
+            pool.enqueue(std::bind(doPath, storePath));
+
+        pool.process();
+
+        printMsg(lvlInfo, format("imported %d signatures") % added);
+    }
+};
+
+static RegisterCommand r1(make_ref<CmdCopySigs>());
+
+struct CmdSignPaths : StorePathsCommand
+{
+    Path secretKeyFile;
+
+    CmdSignPaths()
+    {
+        mkFlag('k', "key-file", {"file"}, "file containing the secret signing key", &secretKeyFile);
+    }
+
+    std::string name() override
+    {
+        return "sign-paths";
+    }
+
+    std::string description() override
+    {
+        return "sign the specified paths";
+    }
+
+    void run(ref<Store> store, Paths storePaths) override
+    {
+        if (secretKeyFile.empty())
+            throw UsageError("you must specify a secret key file using ‘-k’");
+
+        SecretKey secretKey(readFile(secretKeyFile));
+
+        size_t added{0};
+
+        for (auto & storePath : storePaths) {
+            auto info = store->queryPathInfo(storePath);
+
+            auto info2(*info);
+            info2.sigs.clear();
+            info2.sign(secretKey);
+            assert(!info2.sigs.empty());
+
+            if (!info->sigs.count(*info2.sigs.begin())) {
+                store->addSignatures(storePath, info2.sigs);
+                added++;
+            }
+        }
+
+        printMsg(lvlInfo, format("added %d signatures") % added);
+    }
+};
+
+static RegisterCommand r3(make_ref<CmdSignPaths>());