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Merge pull request #11610 from Mic92/ssl-fix
fix passing CA files into builtins:fetchurl sandbox
This commit is contained in:
commit
4dc7946acd
4 changed files with 30 additions and 12 deletions
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@ -9,7 +9,8 @@ namespace nix {
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void builtinFetchurl(
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const BasicDerivation & drv,
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const std::map<std::string, Path> & outputs,
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const std::string & netrcData);
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const std::string & netrcData,
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const std::string & caFileData);
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void builtinUnpackChannel(
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const BasicDerivation & drv,
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@ -9,7 +9,8 @@ namespace nix {
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void builtinFetchurl(
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const BasicDerivation & drv,
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const std::map<std::string, Path> & outputs,
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const std::string & netrcData)
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const std::string & netrcData,
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const std::string & caFileData)
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{
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/* Make the host's netrc data available. Too bad curl requires
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this to be stored in a file. It would be nice if we could just
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@ -19,6 +20,9 @@ void builtinFetchurl(
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writeFile(settings.netrcFile, netrcData, 0600);
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}
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settings.caFile = "ca-certificates.crt";
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writeFile(settings.caFile, caFileData, 0600);
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auto out = get(drv.outputs, "out");
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if (!out)
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throw Error("'builtin:fetchurl' requires an 'out' output");
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@ -1743,13 +1743,20 @@ void LocalDerivationGoal::runChild()
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bool setUser = true;
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/* Make the contents of netrc available to builtin:fetchurl
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(which may run under a different uid and/or in a sandbox). */
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/* Make the contents of netrc and the CA certificate bundle
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available to builtin:fetchurl (which may run under a
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different uid and/or in a sandbox). */
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std::string netrcData;
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try {
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if (drv->isBuiltin() && drv->builder == "builtin:fetchurl")
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netrcData = readFile(settings.netrcFile);
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} catch (SystemError &) { }
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std::string caFileData;
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if (drv->isBuiltin() && drv->builder == "builtin:fetchurl") {
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try {
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netrcData = readFile(settings.netrcFile);
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} catch (SystemError &) { }
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try {
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caFileData = readFile(settings.caFile);
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} catch (SystemError &) { }
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}
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#if __linux__
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if (useChroot) {
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@ -2188,7 +2195,7 @@ void LocalDerivationGoal::runChild()
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worker.store.printStorePath(scratchOutputs.at(e.first)));
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if (drv->builder == "builtin:fetchurl")
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builtinFetchurl(*drv, outputs, netrcData);
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builtinFetchurl(*drv, outputs, netrcData, caFileData);
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else if (drv->builder == "builtin:buildenv")
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builtinBuildenv(*drv, outputs);
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else if (drv->builder == "builtin:unpack-channel")
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@ -1,7 +1,7 @@
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# Test whether builtin:fetchurl properly performs TLS certificate
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# checks on HTTPS servers.
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{ lib, config, pkgs, ... }:
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{ pkgs, ... }:
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let
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@ -25,7 +25,7 @@ in
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name = "nss-preload";
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nodes = {
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machine = { lib, pkgs, ... }: {
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machine = { pkgs, ... }: {
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services.nginx = {
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enable = true;
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@ -60,13 +60,16 @@ in
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};
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};
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testScript = { nodes, ... }: ''
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testScript = ''
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machine.wait_for_unit("nginx")
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machine.wait_for_open_port(443)
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out = machine.succeed("curl https://good/index.html")
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assert out == "hello world\n"
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out = machine.succeed("cat ${badCert}/cert.pem > /tmp/cafile.pem; curl --cacert /tmp/cafile.pem https://bad/index.html")
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assert out == "foobar\n"
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# Fetching from a server with a trusted cert should work.
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machine.succeed("nix build --no-substitute --expr 'import <nix/fetchurl.nix> { url = \"https://good/index.html\"; hash = \"sha256-qUiQTy8PR5uPgZdpSzAYSw0u0cHNKh7A+4XSmaGSpEc=\"; }'")
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@ -74,5 +77,8 @@ in
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err = machine.fail("nix build --no-substitute --expr 'import <nix/fetchurl.nix> { url = \"https://bad/index.html\"; hash = \"sha256-rsBwZF/lPuOzdjBZN2E08FjMM3JHyXit0Xi2zN+wAZ8=\"; }' 2>&1")
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print(err)
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assert "SSL certificate problem: self-signed certificate" in err
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# Fetching from a server with a trusted cert should work via environment variable override.
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machine.succeed("NIX_SSL_CERT_FILE=/tmp/cafile.pem nix build --no-substitute --expr 'import <nix/fetchurl.nix> { url = \"https://bad/index.html\"; hash = \"sha256-rsBwZF/lPuOzdjBZN2E08FjMM3JHyXit0Xi2zN+wAZ8=\"; }'")
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'';
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}
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