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Remove OpenSSL-based signing

This commit is contained in:
Eelco Dolstra 2016-05-03 15:11:14 +02:00
parent dfebfc835f
commit f435f82475
16 changed files with 52 additions and 142 deletions
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4
configure.ac
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@ -168,10 +168,6 @@ AC_SUBST(storedir)
# Look for OpenSSL, a required dependency.
AC_PATH_PROG(openssl, openssl, openssl) # if not found, call openssl in $PATH
AC_SUBST(openssl)
AC_DEFINE_UNQUOTED(OPENSSL_PATH, ["$openssl"], [Path of the OpenSSL binary])
PKG_CHECK_MODULES([OPENSSL], [libcrypto], [CXXFLAGS="$OPENSSL_CFLAGS $CXXFLAGS"])

1
perl/lib/Nix/Config.pm.in
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@ -14,7 +14,6 @@ $storeDir = $ENV{"NIX_STORE_DIR"} || "@storedir@";
$bzip2 = "@bzip2@";
$xz = "@xz@";
$curl = "@curl@";
$openssl = "@openssl@";
$useBindings = "@perlbindings@" eq "yes";

12
perl/lib/Nix/CopyClosure.pm
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@ -10,7 +10,7 @@ use IPC::Open2;
sub copyToOpen {
my ($from, $to, $sshHost, $storePaths, $includeOutputs, $dryRun, $sign, $useSubstitutes) = @_;
my ($from, $to, $sshHost, $storePaths, $includeOutputs, $dryRun, $useSubstitutes) = @_;
$useSubstitutes = 0 if $dryRun || !defined $useSubstitutes;
@ -41,13 +41,13 @@ sub copyToOpen {
# Send the "import paths" command.
syswrite($to, pack("L<x4", 4)) or die;
exportPaths(fileno($to), $sign, @missing);
exportPaths(fileno($to), @missing);
readInt($from) == 1 or die "remote machine ‘$sshHost’ failed to import closure\n";
}
sub copyTo {
my ($sshHost, $storePaths, $includeOutputs, $dryRun, $sign, $useSubstitutes) = @_;
my ($sshHost, $storePaths, $includeOutputs, $dryRun, $useSubstitutes) = @_;
# Connect to the remote host.
my ($from, $to);
@ -61,7 +61,7 @@ sub copyTo {
return oldCopyTo(@_);
}
copyToOpen($from, $to, $sshHost, $storePaths, $includeOutputs, $dryRun, $sign, $useSubstitutes);
copyToOpen($from, $to, $sshHost, $storePaths, $includeOutputs, $dryRun, $useSubstitutes);
close $to;
}
@ -70,7 +70,7 @@ sub copyTo {
# For backwards compatibility with Nix <= 1.7. Will be removed
# eventually.
sub oldCopyTo {
my ($sshHost, $storePaths, $includeOutputs, $dryRun, $sign, $useSubstitutes) = @_;
my ($sshHost, $storePaths, $includeOutputs, $dryRun, $useSubstitutes) = @_;
# Get the closure of this path.
my @closure = reverse(topoSortPaths(computeFSClosure(0, $includeOutputs,
@ -105,7 +105,7 @@ sub oldCopyTo {
print STDERR "copying ", scalar @missing, " missing paths to ‘$sshHost’...\n";
unless ($dryRun) {
open SSH, "| ssh $sshHost @globalSshOpts 'nix-store --import' > /dev/null" or die;
exportPaths(fileno(SSH), $sign, @missing);
exportPaths(fileno(SSH), @missing);
close SSH or die "copying store paths to remote machine ‘$sshHost’ failed: $?";
}
}

6
perl/lib/Nix/Store.xs
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@ -169,13 +169,13 @@ SV * followLinksToStorePath(char * path)
RETVAL
void exportPaths(int fd, int sign, ...)
void exportPaths(int fd, ...)
PPCODE:
try {
Paths paths;
for (int n = 2; n < items; ++n) paths.push_back(SvPV_nolen(ST(n)));
FdSink sink(fd);
store()->exportPaths(paths, sign, sink);
store()->exportPaths(paths, sink);
} catch (Error & e) {
croak("%s", e.what());
}
@ -185,7 +185,7 @@ void importPaths(int fd)
PPCODE:
try {
FdSource source(fd);
store()->importPaths(false, source, 0);
store()->importPaths(source, 0);
} catch (Error & e) {
croak("%s", e.what());
}

6
scripts/build-remote.pl.in
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@ -223,10 +223,6 @@ my @inputs = split /\s/, readline(STDIN);
my @outputs = split /\s/, readline(STDIN);
my $maybeSign = "";
$maybeSign = "--sign" if -e "$Nix::Config::confDir/signing-key.sec";
# Copy the derivation and its dependencies to the build machine. This
# is guarded by an exclusive lock per machine to prevent multiple
# build-remote instances from copying to a machine simultaneously.
@ -250,7 +246,7 @@ if ($@) {
print STDERR "somebody is hogging $uploadLock, continuing...\n";
unlink $uploadLock;
}
Nix::CopyClosure::copyToOpen($from, $to, $hostName, [ $drvPath, @inputs ], 0, 0, $maybeSign ne "");
Nix::CopyClosure::copyToOpen($from, $to, $hostName, [ $drvPath, @inputs ], 0, 0);
close UPLOADLOCK;

10
scripts/nix-copy-closure.in
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@ -12,7 +12,7 @@ binmode STDERR, ":encoding(utf8)";
if (scalar @ARGV < 1) {
print STDERR <<EOF
Usage: nix-copy-closure [--from | --to] HOSTNAME [--sign] [--gzip] [--bzip2] [--xz] PATHS...
Usage: nix-copy-closure [--from | --to] HOSTNAME [--gzip] [--bzip2] [--xz] PATHS...
EOF
;
exit 1;
@ -21,7 +21,6 @@ EOF
# Get the target host.
my $sshHost;
my $sign = 0;
my $toMode = 1;
my $includeOutputs = 0;
my $dryRun = 0;
@ -38,9 +37,6 @@ while (@ARGV) {
if ($arg eq "--help") {
exec "man nix-copy-closure" or die;
}
elsif ($arg eq "--sign") {
$sign = 1;
}
elsif ($arg eq "--gzip" || $arg eq "--bzip2" || $arg eq "--xz") {
warn "$0: ‘$arg’ is not implemented\n" if $arg ne "--gzip";
push @globalSshOpts, "-C";
@ -81,7 +77,7 @@ die "$0: you did not specify a host name\n" unless defined $sshHost;
if ($toMode) { # Copy TO the remote machine.
Nix::CopyClosure::copyTo(
$sshHost, [ @storePaths ],
$includeOutputs, $dryRun, $sign, $useSubstitutes);
$includeOutputs, $dryRun, $useSubstitutes);
}
else { # Copy FROM the remote machine.
@ -99,7 +95,7 @@ else { # Copy FROM the remote machine.
if (scalar @missing > 0) {
print STDERR "copying ", scalar @missing, " missing paths from ‘$sshHost’...\n";
writeInt(5, $to); # == cmdExportPaths
writeInt($sign ? 1 : 0, $to);
writeInt(0, $to); # obsolete
writeStrings(\@missing, $to);
importPaths(fileno($from));
}

9
src/libstore/binary-cache-store.cc
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@ -156,10 +156,8 @@ void BinaryCacheStore::narFromPath(const Path & storePath, Sink & sink)
sink((unsigned char *) nar->c_str(), nar->size());
}
void BinaryCacheStore::exportPath(const Path & storePath, bool sign, Sink & sink)
void BinaryCacheStore::exportPath(const Path & storePath, Sink & sink)
{
assert(!sign);
auto res = queryPathInfo(storePath);
narFromPath(storePath, sink);
@ -169,10 +167,9 @@ void BinaryCacheStore::exportPath(const Path & storePath, bool sign, Sink & sink
sink << exportMagic << storePath << res->references << res->deriver << 0;
}
Paths BinaryCacheStore::importPaths(bool requireSignature, Source & source,
Paths BinaryCacheStore::importPaths(Source & source,
std::shared_ptr<FSAccessor> accessor)
{
assert(!requireSignature);
Paths res;
while (true) {
unsigned long long n = readLongLong(source);
@ -346,7 +343,7 @@ struct BinaryCacheStoreAccessor : public FSAccessor
if (i != nars.end()) return {i->second, restPath};
StringSink sink;
store->exportPath(storePath, false, sink);
store->exportPath(storePath, sink);
auto accessor = makeNarAccessor(sink.s);
nars.emplace(storePath, accessor);

4
src/libstore/binary-cache-store.hh
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@ -91,9 +91,9 @@ public:
void narFromPath(const Path & path, Sink & sink) override;
void exportPath(const Path & path, bool sign, Sink & sink) override;
void exportPath(const Path & path, Sink & sink) override;
Paths importPaths(bool requireSignature, Source & source,
Paths importPaths(Source & source,
std::shared_ptr<FSAccessor> accessor) override;
Path importPath(Source & source, std::shared_ptr<FSAccessor> accessor);

77
src/libstore/local-store.cc
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@ -1035,18 +1035,7 @@ struct HashAndWriteSink : Sink
};
static void checkSecrecy(const Path & path)
{
struct stat st;
if (stat(path.c_str(), &st))
throw SysError(format("getting status of ‘%1%’") % path);
if ((st.st_mode & (S_IRWXG | S_IRWXO)) != 0)
throw Error(format("file ‘%1%’ should be secret (inaccessible to everybody else)!") % path);
}
void LocalStore::exportPath(const Path & path, bool sign,
Sink & sink)
void LocalStore::exportPath(const Path & path, Sink & sink)
{
assertStorePath(path);
@ -1068,30 +1057,7 @@ void LocalStore::exportPath(const Path & path, bool sign,
hashAndWriteSink << exportMagic << path << info->references << info->deriver;
if (sign) {
Hash hash = hashAndWriteSink.currentHash();
Path tmpDir = createTempDir();
AutoDelete delTmp(tmpDir);
Path hashFile = tmpDir + "/hash";
writeFile(hashFile, printHash(hash));
Path secretKey = settings.nixConfDir + "/signing-key.sec";
checkSecrecy(secretKey);
Strings args;
args.push_back("rsautl");
args.push_back("-sign");
args.push_back("-inkey");
args.push_back(secretKey);
args.push_back("-in");
args.push_back(hashFile);
string signature = runProgram(OPENSSL_PATH, true, args);
hashAndWriteSink << 1 << signature;
} else
hashAndWriteSink << 0;
hashAndWriteSink << 0; // backwards compatibility
}
@ -1129,7 +1095,7 @@ Path LocalStore::createTempDirInStore()
}
Path LocalStore::importPath(bool requireSignature, Source & source)
Path LocalStore::importPath(Source & source)
{
HashAndReadSource hashAndReadSource(source);
@ -1160,36 +1126,9 @@ Path LocalStore::importPath(bool requireSignature, Source & source)
bool haveSignature = readInt(hashAndReadSource) == 1;
if (requireSignature && !haveSignature)
throw Error(format("imported archive of ‘%1%’ lacks a signature") % dstPath);
if (haveSignature) {
string signature = readString(hashAndReadSource);
if (requireSignature) {
Path sigFile = tmpDir + "/sig";
writeFile(sigFile, signature);
Strings args;
args.push_back("rsautl");
args.push_back("-verify");
args.push_back("-inkey");
args.push_back(settings.nixConfDir + "/signing-key.pub");
args.push_back("-pubin");
args.push_back("-in");
args.push_back(sigFile);
string hash2 = runProgram(OPENSSL_PATH, true, args);
/* Note: runProgram() throws an exception if the signature
is invalid. */
if (printHash(hash) != hash2)
throw Error(
"signed hash doesn't match actual contents of imported "
"archive; archive could be corrupt, or someone is trying "
"to import a Trojan horse");
}
}
if (haveSignature)
// Ignore legacy signature.
readString(hashAndReadSource);
/* Do the actual import. */
@ -1239,7 +1178,7 @@ Path LocalStore::importPath(bool requireSignature, Source & source)
}
Paths LocalStore::importPaths(bool requireSignature, Source & source,
Paths LocalStore::importPaths(Source & source,
std::shared_ptr<FSAccessor> accessor)
{
Paths res;
@ -1247,7 +1186,7 @@ Paths LocalStore::importPaths(bool requireSignature, Source & source,
unsigned long long n = readLongLong(source);
if (n == 0) break;
if (n != 1) throw Error("input doesn't look like something created by ‘nix-store --export’");
res.push_back(importPath(requireSignature, source));
res.push_back(importPath(source));
}
return res;
}

7
src/libstore/local-store.hh
View File

@ -126,10 +126,9 @@ public:
Path addTextToStore(const string & name, const string & s,
const PathSet & references, bool repair = false) override;
void exportPath(const Path & path, bool sign,
Sink & sink) override;
void exportPath(const Path & path, Sink & sink) override;
Paths importPaths(bool requireSignature, Source & source,
Paths importPaths(Source & source,
std::shared_ptr<FSAccessor> accessor) override;
void buildPaths(const PathSet & paths, BuildMode buildMode) override;
@ -230,7 +229,7 @@ private:
Path createTempDirInStore();
Path importPath(bool requireSignature, Source & source);
Path importPath(Source & source);
void checkDerivationOutputs(const Path & drvPath, const Derivation & drv);

9
src/libstore/remote-store.cc
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@ -373,23 +373,20 @@ Path RemoteStore::addTextToStore(const string & name, const string & s,
}
void RemoteStore::exportPath(const Path & path, bool sign,
Sink & sink)
void RemoteStore::exportPath(const Path & path, Sink & sink)
{
auto conn(connections->get());
conn->to << wopExportPath << path << (sign ? 1 : 0);
conn->to << wopExportPath << path << 0;
conn->processStderr(&sink); /* sink receives the actual data */
readInt(conn->from);
}
Paths RemoteStore::importPaths(bool requireSignature, Source & source,
Paths RemoteStore::importPaths(Source & source,
std::shared_ptr<FSAccessor> accessor)
{
auto conn(connections->get());
conn->to << wopImportPaths;
/* We ignore requireSignature, since the worker forces it to true
anyway. */
conn->processStderr(0, &source);
return readStorePaths<Paths>(conn->from);
}

5
src/libstore/remote-store.hh
View File

@ -58,10 +58,9 @@ public:
Path addTextToStore(const string & name, const string & s,
const PathSet & references, bool repair = false) override;
void exportPath(const Path & path, bool sign,
Sink & sink) override;
void exportPath(const Path & path, Sink & sink) override;
Paths importPaths(bool requireSignature, Source & source,
Paths importPaths(Source & source,
std::shared_ptr<FSAccessor> accessor) override;
void buildPaths(const PathSet & paths, BuildMode buildMode) override;

9
src/libstore/store-api.cc
View File

@ -363,10 +363,10 @@ void copyStorePath(ref<Store> srcStore, ref<Store> dstStore,
auto info = srcStore->queryPathInfo(storePath);
StringSink sink;
srcStore->exportPaths({storePath}, false, sink);
srcStore->exportPaths({storePath}, sink);
StringSource source(*sink.s);
dstStore->importPaths(false, source, 0);
dstStore->importPaths(source, 0);
}
@ -406,12 +406,11 @@ string showPaths(const PathSet & paths)
}
void Store::exportPaths(const Paths & paths,
bool sign, Sink & sink)
void Store::exportPaths(const Paths & paths, Sink & sink)
{
for (auto & i : paths) {
sink << 1;
exportPath(i, sign, sink);
exportPath(i, sink);
}
sink << 0;
}

11
src/libstore/store-api.hh
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@ -270,21 +270,18 @@ public:
virtual void narFromPath(const Path & path, Sink & sink) = 0;
/* Export a store path, that is, create a NAR dump of the store
path and append its references and its deriver. Optionally, a
cryptographic signature (created by OpenSSL) of the preceding
data is attached. */
virtual void exportPath(const Path & path, bool sign,
Sink & sink) = 0;
path and append its references and its deriver. */
virtual void exportPath(const Path & path, Sink & sink) = 0;
/* Export multiple paths in the format expected by ‘nix-store
--import’. */
void exportPaths(const Paths & paths, bool sign, Sink & sink);
void exportPaths(const Paths & paths, Sink & sink);
/* Import a sequence of NAR dumps created by exportPaths() into
the Nix store. Optionally, the contents of the NARs are
preloaded into the specified FS accessor to speed up subsequent
access. */
virtual Paths importPaths(bool requireSignature, Source & source,
virtual Paths importPaths(Source & source,
std::shared_ptr<FSAccessor> accessor) = 0;
/* For each path, if it's a derivation, build it. Building a

6
src/nix-daemon/nix-daemon.cc
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@ -312,10 +312,10 @@ static void performOp(ref<LocalStore> store, bool trusted, unsigned int clientVe
case wopExportPath: {
Path path = readStorePath(from);
bool sign = readInt(from) == 1;
readInt(from); // obsolete
startWork();
TunnelSink sink(to);
store->exportPath(path, sign, sink);
store->exportPath(path, sink);
stopWork();
to << 1;
break;
@ -324,7 +324,7 @@ static void performOp(ref<LocalStore> store, bool trusted, unsigned int clientVe
case wopImportPaths: {
startWork();
TunnelSource source(from);
Paths paths = store->importPaths(!trusted, source, 0);
Paths paths = store->importPaths(source, 0);
stopWork();
to << paths;
break;

18
src/nix-store/nix-store.cc
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@ -699,29 +699,25 @@ static void opRestore(Strings opFlags, Strings opArgs)
static void opExport(Strings opFlags, Strings opArgs)
{
bool sign = false;
for (auto & i : opFlags)
if (i == "--sign") sign = true;
else throw UsageError(format("unknown flag ‘%1%’") % i);
throw UsageError(format("unknown flag ‘%1%’") % i);
FdSink sink(STDOUT_FILENO);
Paths sorted = store->topoSortPaths(PathSet(opArgs.begin(), opArgs.end()));
reverse(sorted.begin(), sorted.end());
store->exportPaths(sorted, sign, sink);
store->exportPaths(sorted, sink);
}
static void opImport(Strings opFlags, Strings opArgs)
{
bool requireSignature = false;
for (auto & i : opFlags)
if (i == "--require-signature") requireSignature = true;
else throw UsageError(format("unknown flag ‘%1%’") % i);
throw UsageError(format("unknown flag ‘%1%’") % i);
if (!opArgs.empty()) throw UsageError("no arguments expected");
FdSource source(STDIN_FILENO);
Paths paths = store->importPaths(requireSignature, source, 0);
Paths paths = store->importPaths(source, 0);
for (auto & i : paths)
cout << format("%1%\n") % i << std::flush;
@ -909,16 +905,16 @@ static void opServe(Strings opFlags, Strings opArgs)
case cmdImportPaths: {
if (!writeAllowed) throw Error("importing paths is not allowed");
store->importPaths(false, in, 0);
store->importPaths(in, 0);
out << 1; // indicate success
break;
}
case cmdExportPaths: {
bool sign = readInt(in);
readInt(in); // obsolete
Paths sorted = store->topoSortPaths(readStorePaths<PathSet>(in));
reverse(sorted.begin(), sorted.end());
store->exportPaths(sorted, sign, out);
store->exportPaths(sorted, out);
break;
}