version 1.10, 2005/01/19 18:16:35
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version 1.17, 2006/09/28 20:47:13
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Line 29
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Line 29
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package Apache::lonenc; |
package Apache::lonenc; |
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use strict; |
use strict; |
use Apache::Constants qw(:common :remotehost); |
use Apache::lonnet; |
use Apache::lonnet(); |
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use Apache::File(); |
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use Apache::loncommon; |
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use Crypt::IDEA; |
use Crypt::IDEA; |
use Time::HiRes qw(gettimeofday); |
use Time::HiRes qw(gettimeofday); |
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use LONCAPA; |
sub handler { |
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my $r = shift; |
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my %cookies=CGI::Cookie->parse($r->header_in('Cookie')); |
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my $lonid=$cookies{'lonID'}; |
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my $cookie; |
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if ($lonid) { |
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my $handle=$lonid->value; |
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$handle=~s/\W//g; |
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my $lonidsdir=$r->dir_config('lonIDsDir'); |
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$ENV{'request.enc'}=1; |
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if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) { |
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# Initialize Environment |
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&Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle); |
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# Decrypt URL and redirect |
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my $redirect=&unencrypted($r->uri); |
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if ($r->args) { $redirect.='?'.$r->args; } |
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$r->internal_redirect($redirect); |
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return OK; |
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} |
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} |
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return FORBIDDEN; |
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} |
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sub encryptseed { |
sub encryptseed { |
my $seed=$ENV{'course.'.$ENV{'request.course.id'}.'.internal.encseed'}; |
my $seed=$env{'course.'.$env{'request.course.id'}.'.internal.encseed'}; |
$seed=~s/[^0-9a-f]/0/g; |
$seed=~s/[^0-9a-f]/0/g; |
$seed.='0123456789abcdef'; |
$seed.='0123456789abcdef'; |
$seed=substr($seed.$seed,0,32); |
$seed=substr($seed.$seed,0,32); |
Line 71 sub unencrypted {
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Line 46 sub unencrypted {
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my $uri=shift; |
my $uri=shift; |
$uri=~s/^\/enc\/(\d+)\///; |
$uri=~s/^\/enc\/(\d+)\///; |
my $cmdlength=$1; |
my $cmdlength=$1; |
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# strip any added extension |
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$uri=~s/\.[^.]*//; |
my $seed=&encryptseed(); |
my $seed=&encryptseed(); |
unless ($seed) { |
unless ($seed) { |
return '/'.$uri; |
return '/'.$uri; |
} |
} |
$uri=&Apache::lonnet::unescape($uri); |
$uri=&unescape($uri); |
my $cipher=new IDEA $seed; |
my $cipher=new IDEA $seed; |
my $decuri=''; |
my $decuri=''; |
for (my $encidx=0;$encidx<length($uri);$encidx+=16) { |
for (my $encidx=0;$encidx<length($uri);$encidx+=16) { |
Line 83 sub unencrypted {
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Line 60 sub unencrypted {
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pack("H16",substr($uri,$encidx,16)) |
pack("H16",substr($uri,$encidx,16)) |
); |
); |
} |
} |
$ENV{'request.enc'}=1; |
$env{'request.enc'}=1; |
$decuri=&remove_noise($decuri); |
$decuri=&remove_noise($decuri); |
return substr($decuri,0,$cmdlength); |
return substr($decuri,0,$cmdlength); |
} |
} |
Line 110 sub remove_noise {
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Line 87 sub remove_noise {
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} |
} |
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sub encrypted { |
sub encrypted { |
my $uri=shift; |
my ($uri,$force_enc) = @_; |
if ($ENV{'request.role.adv'}) { return($uri); } |
if (!$force_enc && $env{'request.role.adv'}) { return($uri); } |
my $seed=&encryptseed(); |
my $seed=&encryptseed(); |
unless ($seed) { |
unless ($seed) { |
return $uri; |
return $uri; |
Line 127 sub encrypted {
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Line 104 sub encrypted {
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$encuri.=unpack("H16", |
$encuri.=unpack("H16", |
$cipher->encrypt(substr($uri,$encidx,8))); |
$cipher->encrypt(substr($uri,$encidx,8))); |
} |
} |
return '/enc/'.$cmdlength.'/'.&Apache::lonnet::escape($encuri); |
return '/enc/'.$cmdlength.'/'.&escape($encuri); |
} |
} |
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sub check_encrypt { |
sub check_encrypt { |
my $str=shift; |
my $str=shift; |
if ($ENV{'request.enc'}) { return &Apache::lonenc::encrypted($str); } |
if ($env{'request.enc'}) { return &Apache::lonenc::encrypted($str); } |
return $str; |
return $str; |
} |
} |
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Line 147 sub check_decrypt {
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Line 124 sub check_decrypt {
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} |
} |
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sub encrypt_ref { |
sub encrypt_ref { |
my ($token,$elements)=@_; |
my ($token,$elements,$force_enc)=@_; |
my $html; |
my $html; |
if ($ENV{'request.enc'}) { |
if ($force_enc || $env{'request.enc'}) { |
while (my ($name,$value)= each(%{ $elements })) { |
while (my ($name,$value)= each(%{ $elements })) { |
if (!$value) { next; } |
if (!$value) { next; } |
my $href=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$value); |
my $href=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$value); |
if ($href !~ /^http:/) { $href=&Apache::lonenc::encrypted($href); } |
if ($href !~ /^http:/) { |
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# IE really wants an extension |
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my ($extension) = ($href =~ m/(\.[^.]*)$/); |
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$href = &Apache::lonenc::encrypted($href,$force_enc); |
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$href .= $extension; |
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} |
$token->[2]->{$name}=$href; |
$token->[2]->{$name}=$href; |
} |
} |
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delete($token->[2]->{'encrypturl'}); |
$html = &Apache::edit::rebuild_tag($token); |
$html = &Apache::edit::rebuild_tag($token); |
} else { |
} else { |
$html = $token->[4]; |
$html = $token->[4]; |