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Add a setting for configuring the SSL certificates file

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This provides a platform-independent way to configure the SSL
certificates file in the Nix daemon. Previously we provided
instructions for overriding the environment variable in launchd, but
that obviously doesn't work with systemd. Now we can just tell users
to add

  ssl-cert-file = /etc/ssl/my-certificate-bundle.crt

to their nix.conf.
This commit is contained in:
Eelco Dolstra 2023-03-17 18:32:18 +01:00
parent 790dd2555b
commit e53e5c38d4
5 changed files with 28 additions and 20 deletions
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11
doc/manual/src/installation/env-variables.md
View File

@ -42,14 +42,11 @@ export NIX_SSL_CERT_FILE=/etc/ssl/my-certificate-bundle.crt
> You must not add the export and then do the install, as the Nix
> installer will detect the presence of Nix configuration, and abort.
## `NIX_SSL_CERT_FILE` with macOS and the Nix daemon
If you use the Nix daemon, you should also add the following to
`/etc/nix/nix.conf`:
On macOS you must specify the environment variable for the Nix daemon
service, then restart it:
```console
$ sudo launchctl setenv NIX_SSL_CERT_FILE /etc/ssl/my-certificate-bundle.crt
$ sudo launchctl kickstart -k system/org.nixos.nix-daemon
```
ssl-cert-file = /etc/ssl/my-certificate-bundle.crt
```
## Proxy Environment Variables

2
misc/launchd/org.nixos.nix-daemon.plist.in
View File

@ -4,8 +4,6 @@
<dict>
<key>EnvironmentVariables</key>
<dict>
<key>NIX_SSL_CERT_FILE</key>
<string>/nix/var/nix/profiles/default/etc/ssl/certs/ca-bundle.crt</string>
<key>OBJC_DISABLE_INITIALIZE_FORK_SAFETY</key>
<string>YES</string>
</dict>

2
src/libstore/filetransfer.cc
View File

@ -318,7 +318,7 @@ struct curlFileTransfer : public FileTransfer
if (request.verifyTLS) {
if (settings.caFile != "")
curl_easy_setopt(req, CURLOPT_CAINFO, settings.caFile.c_str());
curl_easy_setopt(req, CURLOPT_CAINFO, settings.caFile.get().c_str());
} else {
curl_easy_setopt(req, CURLOPT_SSL_VERIFYPEER, 0);
curl_easy_setopt(req, CURLOPT_SSL_VERIFYHOST, 0);

18
src/libstore/globals.cc
View File

@ -44,14 +44,9 @@ Settings::Settings()
lockCPU = getEnv("NIX_AFFINITY_HACK") == "1";
allowSymlinkedStore = getEnv("NIX_IGNORE_SYMLINK_STORE") == "1";
caFile = getEnv("NIX_SSL_CERT_FILE").value_or(getEnv("SSL_CERT_FILE").value_or(""));
if (caFile == "") {
for (auto & fn : {"/etc/ssl/certs/ca-certificates.crt", "/nix/var/nix/profiles/default/etc/ssl/certs/ca-bundle.crt"})
if (pathExists(fn)) {
caFile = fn;
break;
}
}
auto sslOverride = getEnv("NIX_SSL_CERT_FILE").value_or(getEnv("SSL_CERT_FILE").value_or(""));
if (sslOverride != "")
caFile = sslOverride;
/* Backwards compatibility. */
auto s = getEnv("NIX_REMOTE_SYSTEMS");
@ -187,6 +182,13 @@ bool Settings::isWSL1()
return hasSuffix(utsbuf.release, "-Microsoft");
}
Path Settings::getDefaultSSLCertFile()
{
for (auto & fn : {"/etc/ssl/certs/ca-certificates.crt", "/nix/var/nix/profiles/default/etc/ssl/certs/ca-bundle.crt"})
if (pathExists(fn)) return fn;
return "";
}
const std::string nixVersion = PACKAGE_VERSION;
NLOHMANN_JSON_SERIALIZE_ENUM(SandboxMode, {

15
src/libstore/globals.hh
View File

@ -64,6 +64,8 @@ class Settings : public Config {
bool isWSL1();
Path getDefaultSSLCertFile();
public:
Settings();
@ -826,8 +828,17 @@ public:
> `.netrc`.
)"};
/* Path to the SSL CA file used */
Path caFile;
Setting<Path> caFile{
this, getDefaultSSLCertFile(), "ssl-cert-file",
R"(
The path of a file containing CA certificates used to
authenticate `https://` downloads. It defaults to the first
of `/etc/ssl/certs/ca-certificates.crt` and
`/nix/var/nix/profiles/default/etc/ssl/certs/ca-bundle.crt`
that exists. It can be overriden using the
`NIX_SSL_CERT_FILE` and `SSL_CERT_FILE` environment variable
(in that order of precedence).
)"};
#if __linux__
Setting<bool> filterSyscalls{