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Add option allowed-uris

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This allows network access in restricted eval mode.
This commit is contained in:
Eelco Dolstra 2017-10-30 12:39:59 +01:00
parent f1c555cef8
commit 812e027e1d
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GPG key ID: 8170B4726D7198DE
8 changed files with 67 additions and 7 deletions
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20
src/libexpr/eval.cc
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@ -355,6 +355,26 @@ Path EvalState::checkSourcePath(const Path & path_)
}
void EvalState::checkURI(const std::string & uri)
{
if (!restricted) return;
/* 'uri' should be equal to a prefix, or in a subdirectory of a
prefix. Thus, the prefix https://github.co does not permit
access to https://github.com. Note: this allows 'http://' and
'https://' as prefixes for any http/https URI. */
for (auto & prefix : settings.allowedUris.get())
if (uri == prefix ||
(uri.size() > prefix.size()
&& prefix.size() > 0
&& hasPrefix(uri, prefix)
&& (prefix[prefix.size() - 1] == '/' || uri[prefix.size()] == '/')))
return;
throw RestrictedPathError("access to URI '%s' is forbidden in restricted mode", uri);
}
void EvalState::addConstant(const string & name, Value & v)
{
Value * v2 = allocValue();