lix/perl/Makefile.am
Eelco Dolstra 0fdf4da0e9 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 15:42:53 +01:00

39 lines
1.2 KiB
Makefile

PERL_MODULES = lib/Nix/Store.pm lib/Nix/Manifest.pm lib/Nix/GeneratePatches.pm lib/Nix/SSH.pm lib/Nix/CopyClosure.pm lib/Nix/Config.pm.in lib/Nix/Utils.pm lib/Nix/Crypto.pm
all: $(PERL_MODULES:.in=)
install-exec-local: $(PERL_MODULES:.in=) install-perl-xs
$(INSTALL) -d $(DESTDIR)$(perllibdir)/Nix
$(INSTALL_DATA) $(PERL_MODULES:.in=) $(DESTDIR)$(perllibdir)/Nix
if PERL_BINDINGS
install-perl-xs:
$(INSTALL) -d $(DESTDIR)$(perllibdir)/auto/Nix/Store
ln -sfn $(pkglibdir)/libNixStore$(dynlib_suffix) $(DESTDIR)$(perllibdir)/auto/Nix/Store/Store$(dynlib_suffix)
# Awful hackery to get libtool to build Perl XS bindings.
pkglib_LTLIBRARIES = libNixStore.la
nodist_libNixStore_la_SOURCES = lib/Nix/Store.cc
CLEANFILES = lib/Nix/Store.cc
libNixStore_la_LIBADD = $(top_builddir)/src/libstore/libstore.la
AM_CXXFLAGS = \
-I$(top_srcdir)/src -I$(top_srcdir)/src/libutil -I$(top_srcdir)/src/libstore \
-I$(shell $(perl) -e 'use Config; print $$Config{archlibexp};')/CORE \
-D_FILE_OFFSET_BITS=64
lib/Nix/Store.cc: lib/Nix/Store.xs
$(INSTALL) -d lib/Nix
xsubpp $^ -output $@
else
install-perl-xs:
endif
EXTRA_DIST = $(PERL_MODULES) lib/Nix/Store.xs
include ../substitute.mk