2011-10-10 21:11:08 +00:00
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package Nix::Config;
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2012-07-11 22:05:30 +00:00
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$version = "@version@";
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2011-10-10 21:11:08 +00:00
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$binDir = $ENV{"NIX_BIN_DIR"} || "@bindir@";
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$libexecDir = $ENV{"NIX_LIBEXEC_DIR"} || "@libexecdir@";
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2012-01-03 01:51:38 +00:00
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$stateDir = $ENV{"NIX_STATE_DIR"} || "@localstatedir@/nix";
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2011-10-10 21:11:08 +00:00
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$manifestDir = $ENV{"NIX_MANIFESTS_DIR"} || "@localstatedir@/nix/manifests";
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$logDir = $ENV{"NIX_LOG_DIR"} || "@localstatedir@/log/nix";
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2011-11-23 12:21:35 +00:00
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$confDir = $ENV{"NIX_CONF_DIR"} || "@sysconfdir@/nix";
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2012-06-29 22:28:52 +00:00
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$storeDir = $ENV{"NIX_STORE_DIR"} || "@storedir@";
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2011-10-10 21:11:08 +00:00
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2012-06-29 18:26:31 +00:00
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$bzip2 = "@bzip2@";
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$xz = "@xz@";
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2011-10-10 21:11:08 +00:00
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$curl = "@curl@";
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Support cryptographically signed binary caches
NAR info files in binary caches can now have a cryptographic signature
that Nix will verify before using the corresponding NAR file.
To create a private/public key pair for signing and verifying a binary
cache, do:
$ openssl genrsa -out ./cache-key.sec 2048
$ openssl rsa -in ./cache-key.sec -pubout > ./cache-key.pub
You should also come up with a symbolic name for the key, such as
"cache.example.org-1". This will be used by clients to look up the
public key. (It's a good idea to number keys, in case you ever need
to revoke/replace one.)
To create a binary cache signed with the private key:
$ nix-push --dest /path/to/binary-cache --key ./cache-key.sec --key-name cache.example.org-1
The public key (cache-key.pub) should be distributed to the clients.
They should have a nix.conf should contain something like:
signed-binary-caches = *
binary-cache-public-key-cache.example.org-1 = /path/to/cache-key.pub
If all works well, then if Nix fetches something from the signed
binary cache, you will see a message like:
*** Downloading ‘http://cache.example.org/nar/7dppcj5sc1nda7l54rjc0g5l1hamj09j-subversion-1.7.11’ (signed by ‘cache.example.org-1’) to ‘/nix/store/7dppcj5sc1nda7l54rjc0g5l1hamj09j-subversion-1.7.11’...
On the other hand, if the signature is wrong, you get a message like
NAR info file `http://cache.example.org/7dppcj5sc1nda7l54rjc0g5l1hamj09j.narinfo' has an invalid signature; ignoring
Signatures are implemented as a single line appended to the NAR info
file, which looks like this:
Signature: 1;cache.example.org-1;HQ9Xzyanq9iV...muQ==
Thus the signature has 3 fields: a version (currently "1"), the ID of
key, and the base64-encoded signature of the SHA-256 hash of the
contents of the NAR info file up to but not including the Signature
line.
Issue #75.
2014-01-08 14:23:41 +00:00
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$openssl = "@openssl@";
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2006-05-31 09:24:54 +00:00
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2012-05-10 23:03:23 +00:00
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$useBindings = "@perlbindings@" eq "yes";
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2012-07-09 14:57:28 +00:00
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%config = ();
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2006-05-31 09:24:54 +00:00
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sub readConfig {
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2012-07-30 20:09:54 +00:00
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if (defined $ENV{'_NIX_OPTIONS'}) {
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foreach my $s (split '\n', $ENV{'_NIX_OPTIONS'}) {
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my ($n, $v) = split '=', $s, 2;
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$config{$n} = $v;
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}
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return;
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}
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2012-07-09 14:57:28 +00:00
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my $config = "$confDir/nix.conf";
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2006-05-31 09:24:54 +00:00
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return unless -f $config;
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2012-07-30 20:09:54 +00:00
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2006-05-31 09:24:54 +00:00
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open CONFIG, "<$config" or die "cannot open `$config'";
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while (<CONFIG>) {
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Support cryptographically signed binary caches
NAR info files in binary caches can now have a cryptographic signature
that Nix will verify before using the corresponding NAR file.
To create a private/public key pair for signing and verifying a binary
cache, do:
$ openssl genrsa -out ./cache-key.sec 2048
$ openssl rsa -in ./cache-key.sec -pubout > ./cache-key.pub
You should also come up with a symbolic name for the key, such as
"cache.example.org-1". This will be used by clients to look up the
public key. (It's a good idea to number keys, in case you ever need
to revoke/replace one.)
To create a binary cache signed with the private key:
$ nix-push --dest /path/to/binary-cache --key ./cache-key.sec --key-name cache.example.org-1
The public key (cache-key.pub) should be distributed to the clients.
They should have a nix.conf should contain something like:
signed-binary-caches = *
binary-cache-public-key-cache.example.org-1 = /path/to/cache-key.pub
If all works well, then if Nix fetches something from the signed
binary cache, you will see a message like:
*** Downloading ‘http://cache.example.org/nar/7dppcj5sc1nda7l54rjc0g5l1hamj09j-subversion-1.7.11’ (signed by ‘cache.example.org-1’) to ‘/nix/store/7dppcj5sc1nda7l54rjc0g5l1hamj09j-subversion-1.7.11’...
On the other hand, if the signature is wrong, you get a message like
NAR info file `http://cache.example.org/7dppcj5sc1nda7l54rjc0g5l1hamj09j.narinfo' has an invalid signature; ignoring
Signatures are implemented as a single line appended to the NAR info
file, which looks like this:
Signature: 1;cache.example.org-1;HQ9Xzyanq9iV...muQ==
Thus the signature has 3 fields: a version (currently "1"), the ID of
key, and the base64-encoded signature of the SHA-256 hash of the
contents of the NAR info file up to but not including the Signature
line.
Issue #75.
2014-01-08 14:23:41 +00:00
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/^\s*([\w\-\.]+)\s*=\s*(.*)$/ or next;
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2006-05-31 09:24:54 +00:00
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$config{$1} = $2;
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}
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close CONFIG;
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}
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return 1;
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