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Timing: fix mbedtls_set_alarm(0) on Unix/POSIX

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The POSIX/Unix implementation of mbedtls_set_alarm did not set the
mbedtls_timing_alarmed flag when called with 0, which was inconsistent
with what the documentation implied and with the Windows behavior.
This commit is contained in:
Gilles Peskine 2017-10-10 20:10:46 +02:00
parent ec82da4cb2
commit a0af95f052
2 changed files with 7 additions and 0 deletions
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1
ChangeLog
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@ -9,6 +9,7 @@ Bugfix
* Fix memory leak in mbedtls_ssl_set_hostname() when called multiple times. * Fix memory leak in mbedtls_ssl_set_hostname() when called multiple times.
Found by projectgus and jethrogb, #836. Found by projectgus and jethrogb, #836.
* Fix usage help in ssl_server2 example. Found and fixed by Bei Lin. * Fix usage help in ssl_server2 example. Found and fixed by Bei Lin.
* Fix mbedtls_timing_alarm(0) on Unix.
= mbed TLS 2.6.0 branch released 2017-08-10 = mbed TLS 2.6.0 branch released 2017-08-10

6
library/timing.c
View File

@ -315,6 +315,12 @@ void mbedtls_set_alarm( int seconds )
mbedtls_timing_alarmed = 0; mbedtls_timing_alarmed = 0;
signal( SIGALRM, sighandler ); signal( SIGALRM, sighandler );
alarm( seconds ); alarm( seconds );
if( seconds == 0 )
{
/* alarm(0) cancelled any previous pending alarm, but the
handler won't fire, so raise the flag straight away. */
mbedtls_timing_alarmed = 1;
}
} }
#endif /* _WIN32 && !EFIX64 && !EFI32 */ #endif /* _WIN32 && !EFIX64 && !EFI32 */