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authorNorbert Preining <preining@logic.at>2016-04-26 21:42:20 +0000
committerNorbert Preining <preining@logic.at>2016-04-26 21:42:20 +0000
commit9bfdbea37230c6402a3a6f9f286f6e886a7d46e4 (patch)
tree0e494f36e210ae59b285aea0b496e2acd969ba32 /Master/tlpkg/TeXLive/TLCrypto.pm
parentfb53a4c736958f65b497088c7550feacc775620d (diff)
tlmgr/tlcrypto: allow for different sha512 computation methods
git-svn-id: svn://tug.org/texlive/trunk@40770 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/tlpkg/TeXLive/TLCrypto.pm')
-rw-r--r--Master/tlpkg/TeXLive/TLCrypto.pm141
1 files changed, 92 insertions, 49 deletions
diff --git a/Master/tlpkg/TeXLive/TLCrypto.pm b/Master/tlpkg/TeXLive/TLCrypto.pm
index a0fab47aa7d..8a09f94a9ac 100644
--- a/Master/tlpkg/TeXLive/TLCrypto.pm
+++ b/Master/tlpkg/TeXLive/TLCrypto.pm
@@ -9,20 +9,8 @@ package TeXLive::TLCrypto;
use Digest::MD5;
use TeXLive::TLConfig;
-use TeXLive::TLUtils qw(debug ddebug win32 which platform conv_to_w32_path);
-
-# try to load Digest::SHA, and if that fails, use our own slow modules
-my $dig;
-eval {
- require Digest::SHA;
- Digest::SHA->import('sha512_hex');
- $dig = Digest::SHA->new(512);
-};
-if ($@) {
- require TeXLive::SHA;
- TeXLive::SHA->import('sha512_hex');
- $dig = TeXLive::SHA->new(512);
-}
+use TeXLive::TLUtils qw(debug ddebug win32 which platform conv_to_w32_path tlwarn);
+
my $svnrev = '$Revision: 40650 $';
my $_modulerevision = ($svnrev =~ m/: ([0-9]+) /) ? $1 : "unknown";
@@ -38,10 +26,13 @@ C<TeXLive::TLCrypto> -- checksums and cryptographic signatures
use TeXLive::TLCrypto; # requires Digest::MD5 and Digest::SHA
+=head2 Setup
+
+ TeXLive::TLCrypto::setup_checksum_method();
+
=head2 Checksums
TeXLive::TLCrypto::tlchecksum($path);
- TeXLive::TLCrypto::tlmd5($path);
TeXLive::TLCrypto::verify_checksum($file, $url);
=head2 Signatures
@@ -59,10 +50,7 @@ BEGIN {
@ISA = qw(Exporter);
@EXPORT_OK = qw(
&tlchecksum
- &tlmd5
- &tldigest
&tl_short_digest
- &tlmd5
&verify_checksum
&setup_gpg
&verify_signature
@@ -71,65 +59,116 @@ BEGIN {
=pod
-=item C<< tlchecksum($file) >>
+=item C<< setup_checksum_method() >>
-Return checksum of C<$file>.
+Tries to find a checksum method: First check for usability of C<<Digest::SHA>>,
+then for either the C<openssl> or the C<sha512sum> programs.
+Returns the checksum method or undef if none found.
=cut
-sub tlchecksum {
- my ($file) = @_;
- if (-r $file) {
- open(FILE, $file) || die "open($file) failed: $!";
- binmode(FILE);
- my $cshash = $dig->new(512)->addfile(*FILE)->hexdigest;
- close(FILE);
- return $cshash;
- } else {
- tlwarn("tlchecksum: given file not readable: $file\n");
- return "";
+sub setup_checksum_method {
+ # for debugging
+ # $::checksum_method = "sha512sum";
+ # return($::checksum_method);
+ # try to load Digest::SHA, and if that fails, use our own slow modules
+ eval {
+ require Digest::SHA;
+ Digest::SHA->import('sha512_hex');
+ $::checksum_method = "digest::sha";
+ };
+ if ($@) {
+ # ok, Digest::SHA is not available, try to find either the openssl
+ # or sha512sum programs
+ if (TeXLive::TLUtils::which("openssl")) {
+ $::checksum_method = "openssl";
+ } elsif (TeXLive::TLUtils::which("sha512sum")) {
+ $::checksum_method = "sha512sum";
+ } else {
+ debug("Cannot find usable checksum method!\n");
+ }
}
+ return($::checksum_method);
}
-sub tlchecksum_data {
- my ($data) = @_;
- my $cshash = $dig->new(512)->add($data)->hexdigest;
- return $cshash;
-}
=pod
-=item C<< tlmd5($file) >>
+=item C<< tlchecksum($file) >>
-Return md5, specifically, of C<$file>.
+Return checksum of C<$file>.
=cut
-sub tlmd5 {
+sub tlchecksum {
my ($file) = @_;
+ if (!$::checksum_method) {
+ setup_checksum_method();
+ }
if (-r $file) {
- open(FILE, $file) || die "open($file) failed: $!";
- binmode(FILE);
- my $md5hash = Digest::MD5->new->addfile(*FILE)->hexdigest;
- close(FILE);
- return $md5hash;
+ my ($out, $ret);
+ if ($::checksum_method eq "openssl") {
+ ($out, $ret) = TeXLive::TLUtils::run_cmd("openssl dgst -sha512 $file");
+ chomp($out);
+ } elsif ($::checksum_method eq "sha512sum") {
+ ($out, $ret) = TeXLive::TLUtils::run_cmd("sha512sum $file");
+ chomp($out);
+ } elsif ($::checksum_method eq "digest::sha") {
+ open(FILE, $file) || die "open($file) failed: $!";
+ binmode(FILE);
+ $out = Digest::SHA->new(512)->addfile(*FILE)->hexdigest;
+ close(FILE);
+ $ret = 0;
+ } else {
+ tldie("unknown checksum program: $::checksum_method\n");
+ }
+ if ($ret != 0) {
+ tlwarn("tlchecksum: cannot compute checksum: $file\n");
+ return "";
+ }
+ ddebug("tlchecksum: out = $out\n");
+ my $cs;
+ if ($::checksum_method eq "openssl") {
+ (undef,$cs) = split(/= /,$out);
+ } elsif ($::checksum_method eq "sha512sum") {
+ ($cs,undef) = split(' ',$out);
+ } elsif ($::checksum_method eq "digest::sha") {
+ $cs = $out;
+ }
+ ddebug("tlchecksum: cs ===$cs===\n");
+ if (length($cs) != 128) {
+ tlwarn("unexpected output from $::checksum_method: $out\n");
+ return "";
+ }
+ return $cs;
} else {
- tlwarn("tlmd5, given file not readable: $file\n");
+ tlwarn("tlchecksum: given file not readable: $file\n");
return "";
}
}
-=pod
+# sub tlchecksum {
+# my ($file) = @_;
+# if (-r $file) {
+# open(FILE, $file) || die "open($file) failed: $!";
+# binmode(FILE);
+# my $cshash = $dig->new(512)->addfile(*FILE)->hexdigest;
+# close(FILE);
+# return $cshash;
+# } else {
+# tlwarn("tlchecksum: given file not readable: $file\n");
+# return "";
+# }
+# }
-=item C<< tldigest($str) >>
+=pod
=item C<< tl_short_digest($str) >>
-Return full and short digests of C<$str>, respectively.
+Return short digest (MD5) of C<$str>.
=cut
-sub tldigest { return (sha512_hex(shift)); }
sub tl_short_digest { return (Digest::MD5::md5_hex(shift)); }
# emacs-page
@@ -149,6 +188,9 @@ In case of errors returns an informal message as second argument.
sub verify_checksum {
my ($file, $checksum_url) = @_;
+ # don't do anything if we cannot determine a checksum method
+ # return -2 which is as much as missing signature
+ return(-2) if (!$::checksum_method);
my $checksum_file
= TeXLive::TLUtils::download_to_temp_or_file($checksum_url);
@@ -361,6 +403,7 @@ sub gpg_verify_signature {
=back
=cut
+
1;
__END__