* Properly specify the hash algorithm in the manifests, and read it
too. * Change the default hash for nix-prefetch-url back to md5, since that's what we use in Nixpkgs (for now; a birthday attack is rather unlikely there).
This commit is contained in:
Eelco Dolstra
parent
95e870a113
commit
3259ae5811
4 changed files with 31 additions and 13 deletions
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@ -96,7 +96,7 @@ while ($queueFront < scalar @queue) {
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foreach my $patch (@{$patchList}) {
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if (isValidPath($patch->{basePath})) {
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# !!! this should be cached
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my $hash = `@bindir@/nix-hash "$patch->{basePath}"`;
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my $hash = `@bindir@/nix-hash --type '$patch->{hashAlgo}' "$patch->{basePath}"`;
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chomp $hash;
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# print " MY HASH is $hash\n";
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if ($hash ne $patch->{baseHash}) {
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@ -175,8 +175,10 @@ my $maxStep = scalar @path;
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sub downloadFile {
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my $url = shift;
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my $hash = shift;
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my $hashAlgo = shift;
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$ENV{"PRINT_PATH"} = 1;
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$ENV{"QUIET"} = 1;
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$ENV{"NIX_HASH_ALGO"} = $hashAlgo;
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my ($hash2, $path) = `@bindir@/nix-prefetch-url '$url' '$hash'`;
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chomp $hash2;
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chomp $path;
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@ -205,7 +207,7 @@ while (scalar @path > 0) {
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# Download the patch.
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print " downloading patch...\n";
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my $patchPath = downloadFile "$patch->{url}", "$patch->{hash}";
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my $patchPath = downloadFile "$patch->{url}", "$patch->{hash}", "$patch->{hashAlgo}";
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# Turn the base path into a NAR archive, to which we can
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# actually apply the patch.
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@ -232,7 +234,7 @@ while (scalar @path > 0) {
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# Download the archive.
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print " downloading archive...\n";
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my $narFilePath = downloadFile "$narFile->{url}", "$narFile->{hash}";
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my $narFilePath = downloadFile "$narFile->{url}", "$narFile->{hash}", "$narFile->{hashAlgo}";
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# Unpack the archive into the target path.
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print " unpacking archive...\n";
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@ -45,6 +45,7 @@ sub findOutputPaths {
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# Ignore store expressions.
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next if ($p =~ /\.store$/);
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next if ($p =~ /\.drv$/);
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# Ignore builders (too much ambiguity -- they're all called
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# `builder.sh').
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@ -69,7 +70,7 @@ my %dstOutPaths = findOutputPaths \%dstNarFiles, \%dstSuccessors;
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sub getNameVersion {
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my $p = shift;
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$p =~ /\/[0-9a-f]+((?:-[a-zA-Z][^\/-]*)+)([^\/]*)$/;
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$p =~ /\/[0-9a-z]+((?:-[a-zA-Z][^\/-]*)+)([^\/]*)$/;
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my $name = $1;
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my $version = $2;
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$name =~ s/^-//;
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@ -192,16 +193,16 @@ foreach my $p (keys %dstOutPaths) {
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system("@bunzip2@ < $dstNarBz2 > $tmpdir/B") == 0
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or die "cannot unpack $dstNarBz2";
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system("@libexecdir@/bspatch $tmpdir/A $tmpdir/B $tmpdir/DIFF") == 0
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system("@libexecdir@/bsdiff $tmpdir/A $tmpdir/B $tmpdir/DIFF") == 0
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or die "cannot compute binary diff";
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my $baseHash = `@bindir@/nix-hash --flat $tmpdir/A` or die;
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my $baseHash = `@bindir@/nix-hash --flat --type sha1 $tmpdir/A` or die;
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chomp $baseHash;
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my $narHash = `@bindir@/nix-hash --flat $tmpdir/B` or die;
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my $narHash = `@bindir@/nix-hash --flat --type sha1 $tmpdir/B` or die;
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chomp $narHash;
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my $narDiffHash = `@bindir@/nix-hash --flat $tmpdir/DIFF` or die;
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my $narDiffHash = `@bindir@/nix-hash --flat --type sha1 $tmpdir/DIFF` or die;
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chomp $narDiffHash;
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my $narDiffSize = (stat "$tmpdir/DIFF")[7];
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@ -234,7 +235,7 @@ foreach my $p (keys %dstOutPaths) {
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# Add the patch to the manifest.
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addPatch \%dstPatches, $p,
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{ url => "$patchesURL/$finalName", hash => $narDiffHash
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, size => $narDiffSize
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, size => $narDiffSize, hashAlgo => "sha1"
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, basePath => $closest, baseHash => $baseHash
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, narHash => $narHash, patchType => "nar-bsdiff"
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};
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@ -3,7 +3,10 @@
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url=$1
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hash=$2
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hashType="sha1"
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hashType=$NIX_HASH_ALGO
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if test -z "$hashType"; then
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hashType=md5
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fi
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if test -z "$url"; then
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echo "syntax: nix-prefetch-url URL" >&2
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@ -52,6 +52,7 @@ sub readManifest {
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my $narHash;
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my $references;
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my $deriver;
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my $hashAlgo;
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while (<MANIFEST>) {
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chomp;
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@ -75,6 +76,7 @@ sub readManifest {
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undef $patchType;
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$references = "";
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$deriver = "";
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$hashAlgo = "md5";
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}
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} else {
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@ -104,7 +106,7 @@ sub readManifest {
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push @{$narFileList},
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{ url => $url, hash => $hash, size => $size
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, narHash => $narHash, references => $references
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, deriver => $deriver
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, deriver => $deriver, hashAlgo => $hashAlgo
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};
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}
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@ -119,12 +121,14 @@ sub readManifest {
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{ url => $url, hash => $hash, size => $size
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, basePath => $basePath, baseHash => $baseHash
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, narHash => $narHash, patchType => $patchType
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, hashAlgo => $hashAlgo
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};
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}
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}
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elsif (/^\s*StorePath:\s*(\/\S+)\s*$/) { $storePath = $1; }
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elsif (/^\s*HashAlgo:\s*(\S+)\s*$/) { $hashAlgo = $1; }
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elsif (/^\s*Hash:\s*(\S+)\s*$/) { $hash = $1; }
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elsif (/^\s*URL:\s*(\S+)\s*$/) { $url = $1; }
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elsif (/^\s*Size:\s*(\d+)\s*$/) { $size = $1; }
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@ -162,7 +166,11 @@ sub writeManifest
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print MANIFEST " StorePath: $storePath\n";
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print MANIFEST " HashAlgo: $narFile->{hashAlgo}\n";
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print MANIFEST " NarURL: $narFile->{url}\n";
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print MANIFEST " MD5: $narFile->{hash}\n";
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if ($narFile->{hashAlgo} eq "md5") {
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print MANIFEST " MD5: $narFile->{hash}\n";
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} else {
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print MANIFEST " Hash: $narFile->{hash}\n";
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}
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print MANIFEST " NarHash: $narFile->{narHash}\n";
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print MANIFEST " Size: $narFile->{size}\n";
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print MANIFEST " References: $narFile->{references}\n"
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@ -180,7 +188,11 @@ sub writeManifest
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print MANIFEST " StorePath: $storePath\n";
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print MANIFEST " HashAlgo: $patch->{hashAlgo}\n";
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print MANIFEST " NarURL: $patch->{url}\n";
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print MANIFEST " MD5: $patch->{hash}\n";
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if ($patch->{hashAlgo} eq "md5") {
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print MANIFEST " MD5: $patch->{hash}\n";
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} else {
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print MANIFEST " Hash: $patch->{hash}\n";
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}
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print MANIFEST " NarHash: $patch->{narHash}\n";
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print MANIFEST " Size: $patch->{size}\n";
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print MANIFEST " BasePath: $patch->{basePath}\n";
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