scripts/download.pl: add SHA-256 support

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 48253

diff --git a/scripts/download.pl b/scripts/download.pl
index 6f28237af8c381efce0ad7e5e61939f571c312b2..3b8b267a427eef70c49ef1c9453f1b568b834fdc 100755 (executable)
--- a/scripts/download.pl
+++ b/scripts/download.pl
@@ -11,12 +11,12 @@ use warnings;
 use File::Basename;
 use File::Copy;
 
-@ARGV > 2 or die "Syntax: $0 <target dir> <filename> <md5sum> <url filename> [<mirror> ...]\n";
+@ARGV > 2 or die "Syntax: $0 <target dir> <filename> <hash> <url filename> [<mirror> ...]\n";
 
 my $url_filename;
 my $target = shift @ARGV;
 my $filename = shift @ARGV;
-my $md5sum = shift @ARGV;
+my $file_hash = shift @ARGV;
 $url_filename = shift @ARGV unless $ARGV[0] =~ /:\/\//;
 my $scriptdir = dirname($0);
 my @mirrors;
@@ -59,8 +59,20 @@ sub which($) {
        return $res;
 }
 
-my $md5cmd = which("md5sum") || which("md5") || die 'no md5 checksum program found, please install md5 or md5sum';
-chomp $md5cmd;
+sub hash_cmd() {
+       my $len = length($file_hash);
+       my $cmd;
+
+       $len == 64 and return "openssl dgst -sha256";
+       $len == 32 and do {
+               my $cmd = which("md5sum") || which("md5") || die 'no md5 checksum program found, please install md5 or md5sum';
+               chomp $cmd;
+               return $cmd;
+       };
+       return undef;
+}
+
+my $hash_cmd = hash_cmd();
 
 sub download
 {
@@ -105,20 +117,24 @@ sub download
                print("Copying $filename from $link\n");
                copy($link, "$target/$filename.dl");
 
-               if (system("$md5cmd '$target/$filename.dl' > '$target/$filename.md5sum'")) {
-                       print("Failed to generate md5 sum for $filename\n");
-                       return;
-               }
+               $hash_cmd and do {
+                       if (system("$hash_cmd '$target/$filename.dl' > '$target/$filename.hash'")) {
+                               print("Failed to generate hash for $filename\n");
+                               return;
+                       }
+               };
        } else {
                open WGET, "wget -t5 --timeout=20 --no-check-certificate $options -O- '$mirror/$url_filename' |" or die "Cannot launch wget.\n";
-               open MD5SUM, "| $md5cmd > '$target/$filename.md5sum'" or die "Cannot launch md5sum.\n";
+               $hash_cmd and do {
+                       open MD5SUM, "| $hash_cmd > '$target/$filename.hash'" or die "Cannot launch $hash_cmd.\n";
+               };
                open OUTPUT, "> $target/$filename.dl" or die "Cannot create file $target/$filename.dl: $!\n";
                my $buffer;
                while (read WGET, $buffer, 1048576) {
-                       print MD5SUM $buffer;
+                       $hash_cmd and print MD5SUM $buffer;
                        print OUTPUT $buffer;
                }
-               close MD5SUM;
+               $hash_cmd and close MD5SUM;
                close WGET;
                close OUTPUT;
 
@@ -129,15 +145,17 @@ sub download
                }
        }
 
-       my $sum = `cat "$target/$filename.md5sum"`;
-       $sum =~ /^(\w+)\s*/ or die "Could not generate md5sum\n";
-       $sum = $1;
+       $hash_cmd and do {
+               my $sum = `cat "$target/$filename.hash"`;
+               $sum =~ /^(\w+)\s*/ or die "Could not generate file hash\n";
+               $sum = $1;
 
-       if (($md5sum =~ /\w{32}/) and ($sum ne $md5sum)) {
-               print STDERR "MD5 sum of the downloaded file does not match (file: $sum, requested: $md5sum) - deleting download.\n";
-               cleanup();
-               return;
-       }
+               if ($sum ne $file_hash) {
+                       print STDERR "MD5 sum of the downloaded file does not match (file: $sum, requested: $file_hash) - deleting download.\n";
+                       cleanup();
+                       return;
+               }
+       };
 
        unlink "$target/$filename";
        system("mv", "$target/$filename.dl", "$target/$filename");
@@ -147,7 +165,7 @@ sub download
 sub cleanup
 {
        unlink "$target/$filename.dl";
-       unlink "$target/$filename.md5sum";
+       unlink "$target/$filename.hash";
 }
 
 @mirrors = localmirrors();