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Bug #57634 gnupg_encrypt crashes script
Submitted: 2007-04-25 09:47 UTC Modified: 2007-05-04 09:55 UTC
From: webmaster at prontonyc dot com Assigned: traufeisen (profile)
Status: Closed Package: gnupg (PECL)
PHP Version: 4.4.6 OS: Linux
Private report: No CVE-ID: None
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From: webmaster at prontonyc dot com
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 [2007-04-25 09:47 UTC] webmaster at prontonyc dot com
Description:
------------
When I try to encrypt a short text with gnupg_encrypt(), the script exits abruptly.

The script does successfully run gnupg_addencryptkey().  I am also able to run gnupg_keyinfo() and get back information that appears to be accurate.

Thank you.

Reproduce code:
---------------
putenv("GNUPGHOME=/home/pronto/.gnupg/");
$res = gnupg_init();
$gpgak = gnupg_addencryptkey
    ( $res, '9F5C955672FE54F6F793051C5BC1FB2C98410BC4' );
if (FALSE == $gpgak) {
  echo gnupg_geterror($res) . "<hr />\n";
}
$gpgcr = $cryptemail = gnupg_encrypt($res, 'test');
if (FALSE == $gpgcr) {
  echo gnupg_geterror($res). "<hr />\n";
}
print "<p>Encryption finished.  Now preparing message.</p>\n";

Expected result:
----------------
The final message.

Actual result:
--------------
Nothing.  The script terminates without executing or printing anything after the call to gnupg_encrypt().

Until last night, the following error appeared in the error log:

"[9996] EACCELERATOR: PHP crashed on opline 34 of gnupg_encrypt() at /home/pronto/public_html/test/18/pgpemailtest.php:92".

After I reported this to my hosting company, they stopped the error from appearing, but the function still doesn't work.

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 [2007-04-25 09:50 UTC] webmaster at prontonyc dot com
My PHP version is 4.4.6; that version wasn't in the drop-down list, so I put 4.4.5.
 [2007-04-25 09:57 UTC] webmaster at prontonyc dot com
Here is my phpinfo:

http://www.prontonyc.com/phpinfo.php
 [2007-04-25 17:37 UTC] traufeisen@php.net
Can you please provide a backtrace?
If possible, try to reproduce the segfault on the console.
Details on how to generate a backtrace can be found at http://bugs.php.net/bugs-generating-backtrace.php
Basically

gdb /path/to/php
run /path/to/script
<segfault>
bt full
 [2007-04-27 15:17 UTC] webmaster at prontonyc dot com
Thanks; it was installed in a shared hosting environment, and I do not have access to the command line.  I have asked the hosting provider if they can generate a backtrace, but I do not know if they will have the time.
 [2007-04-28 10:49 UTC] webmaster at prontonyc dot com
Here is the backtrace sent by my hosting provider:

(gdb) run gnupg_encryptsign.php
Starting program: /usr/local/bin/php gnupg_encryptsign.php
Reading symbols from shared object read from target memory...done.
Loaded system supplied DSO at 0xb7f89000
[Thread debugging using libthread_db enabled]
[New Thread 16384 (LWP 17942)]
Detaching after fork from child process 29694.
Detaching after fork from child process 22864.
Detaching after fork from child process 17081.
Detaching after fork from child process 28824.
*** glibc detected *** double free or corruption (!prev): 0x0856b288 ***

Program received signal SIGABRT, Aborted.
[Switching to Thread 16384 (LWP 17942)]
0x4f21fba1 in kill () from /lib/i686/libc.so.6
(gdb) bt
#0 0x4f21fba1 in kill () from /lib/i686/libc.so.6
#1 0x4f399271 in pthread_kill () from /lib/i686/libpthread.so.0
#2 0x4f3995db in raise () from /lib/i686/libpthread.so.0
#3 0x4f21f808 in raise () from /lib/i686/libc.so.6
#4 0x4f220f10 in abort () from /lib/i686/libc.so.6
#5 0x4f25377e in __libc_message () from /lib/i686/libc.so.6
#6 0x4f259e7f in _int_free () from /lib/i686/libc.so.6
#7 0x4f25a226 in free () from /lib/i686/libc.so.6
#8 0xb78e098f in zif_gnupg_encryptsign (ht=2, return_value=0x4f31e9c0, this_ptr=0x0, return_value_used=1)
at /root/gnupg-1.3/gnupg.c:1080
#9 0xb780648f in zend_optimizer_set_oe_ex () from /usr/local/Zend/lib/Optimizer-3.2.0/php-4.4.x/ZendOptimizer.so
#10 0x00000002 in ?? ()
#11 0x08561f5c in ?? ()
#12 0x00000000 in ?? ()
(gdb)
 [2007-04-28 10:50 UTC] webmaster at prontonyc dot com
They also sent this, which may be useful to you:

pid 32365] <... read resumed> "-----BEGIN PGP MESSAGE-----\nVers"..., 4096) = 1014
[pid 32365] select(12, [4 11], [], NULL, {1, 0} <unfinished ...>
[pid 26388] open("/home/pronto/.gnupg/random_seed", O_WRONLY|O_CREAT|O_TRUNC|O_LARGEFILE, 0600 <unfinished ...>
[pid 32365] <... select resumed> ) = 1 (in [4], left {1, 0})
[pid 26388] <... open resumed> ) = 15
[pid 32365] select(5, [4], [], NULL, {0, 0} <unfinished ...>
[pid 26388] write(15, "\3479\0\263\323\3408Q\334\200\3244v\'\203.i\342+\335\225"..., 600 <unfinished ...>
[pid 32365] <... select resumed> ) = 1 (in [4], left {0, 0})
[pid 32365] read(4, <unfinished ...>
[pid 26388] <... write resumed> ) = 600
[pid 32365] <... read resumed> "[GNUPG:] END_ENCRYPTION\n", 1024) = 24
[pid 26388] close(15 <unfinished ...>
[pid 32365] select(12, [4 11], [], NULL, {1, 0} <unfinished ...>
[pid 26388] <... close resumed> ) = 0
[pid 26388] munmap(0xb7f98000, 32768) = 0
[pid 26388] unlink("/home/pronto/.gnupg/.#lk0x800af138.ocean.hostingzoom.com.26388") = 0
[pid 26388] exit_group(0) = ?
Process 26388 detached
<... select resumed> ) = 1 (in [11], left {0, 996000})
select(12, [11], [], NULL, {0, 0}) = 1 (in [11], left {0, 0})
read(11, "", 4096) = 0
close(11) = 0
select(5, [4], [], NULL, {1, 0}) = 1 (in [4], left {1, 0})
select(5, [4], [], NULL, {0, 0}) = 1 (in [4], left {0, 0})
read(4, "", 1024) = 0
close(4) = 0
open("/dev/tty", O_RDWR|O_NONBLOCK|O_NOCTTY) = 4
writev(4, [{"*** glibc detected *** ", 23}, {"double free or corruption (!prev"..., 33}, {": 0x", 4}, {"0856b7f8", 8}, {" ***\n", 5}], 5*** glibc detected *** double free or corruption (!prev): 0x0856b7f8 ***
) = 73
rt_sigprocmask(SIG_UNBLOCK, [ABRT], NULL, 8) = 0
kill(32365, SIGABRT) = 0
--- SIGABRT (Aborted) @ 0 (0) ---
+++ killed by SIGABRT (core dumped) +++
 [2007-05-04 09:55 UTC] traufeisen@php.net
Thanks for the backtrace.
This issue occurs with recent gpgme-libs and is now fixed.
 
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