diff options
Diffstat (limited to 'src/libexpr/primops.cc')
| -rw-r--r-- | src/libexpr/primops.cc | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc index 565ed69ae77b..25736ebff065 100644 --- a/src/libexpr/primops.cc +++ b/src/libexpr/primops.cc @@ -1680,9 +1680,8 @@ static void prim_compareVersions(EvalState & state, const Pos & pos, Value * * a void fetch(EvalState & state, const Pos & pos, Value * * args, Value & v, const string & who, bool unpack) { - if (state.restricted) throw Error(format("‘%1%’ is not allowed in restricted mode") % who); - string url; + Hash expectedHash; state.forceValue(*args[0]); @@ -1694,6 +1693,8 @@ void fetch(EvalState & state, const Pos & pos, Value * * args, Value & v, string name(attr.name); if (name == "url") url = state.forceStringNoCtx(*attr.value, *attr.pos); + else if (name == "sha256") + expectedHash = parseHash16or32(htSHA256, state.forceStringNoCtx(*attr.value, *attr.pos)); else throw EvalError(format("unsupported argument ‘%1%’ to ‘%2%’, at %3%") % attr.name % who % attr.pos); } @@ -1704,7 +1705,10 @@ void fetch(EvalState & state, const Pos & pos, Value * * args, Value & v, } else url = state.forceStringNoCtx(*args[0], pos); - Path res = makeDownloader()->downloadCached(state.store, url, unpack); + if (state.restricted && !expectedHash) + throw Error(format("‘%1%’ is not allowed in restricted mode") % who); + + Path res = makeDownloader()->downloadCached(state.store, url, unpack, expectedHash); mkString(v, res, PathSet({res})); } |