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Allow substituters to be marked as trusted

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This is needed by nixos-install, which uses the Nix store on the
installation CD as a substituter. We don't want to disable signature
checking entirely because substitutes from cache.nixos.org should
still be checked. So now we can pas "local?trusted=1" to mark only the
Nix store in /nix as not requiring signatures.

Fixes #1819.
This commit is contained in:
Eelco Dolstra 2018-02-05 18:08:30 +01:00
parent 2175eee9fe
commit bb1d046f5c
No known key found for this signature in database
GPG key ID: 8170B4726D7198DE
2 changed files with 7 additions and 2 deletions
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7
src/libstore/build.cc
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@ -3684,7 +3684,10 @@ void SubstitutionGoal::tryNext()
/* Bail out early if this substituter lacks a valid
signature. LocalStore::addToStore() also checks for this, but
only after we've downloaded the path. */
if (worker.store.requireSigs && !info->checkSignatures(worker.store, worker.store.publicKeys)) {
if (worker.store.requireSigs
&& !sub->isTrusted
&& !info->checkSignatures(worker.store, worker.store.publicKeys))
{
printInfo(format("warning: substituter '%s' does not have a valid signature for path '%s'")
% sub->getUri() % storePath);
tryNext();
@ -3752,7 +3755,7 @@ void SubstitutionGoal::tryToRun()
PushActivity pact(act.id);
copyStorePath(ref<Store>(sub), ref<Store>(worker.store.shared_from_this()),
storePath, repair);
storePath, repair, sub->isTrusted ? NoCheckSigs : CheckSigs);
promise.set_value();
} catch (...) {

2
src/libstore/store-api.hh
View file

@ -248,6 +248,8 @@ public:
const Setting<int> pathInfoCacheSize{this, 65536, "path-info-cache-size", "size of the in-memory store path information cache"};
const Setting<bool> isTrusted{this, false, "trusted", "whether paths from this store can be used as substitutes even when they lack trusted signatures"};
protected:
struct State