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Rm unneeded counter increment with DTLS

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Manuel Pégourié-Gonnard 2014-09-24 09:46:10 +02:00 committed by Paul Bakker
parent 6312e0f4e6
commit ea22ce577e
1 changed files with 17 additions and 10 deletions
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27
library/ssl_tls.c
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@ -1705,17 +1705,24 @@ static int ssl_decrypt_buf( ssl_context *ssl )
else
ssl->nb_zero = 0;
/* Input counter not used with DTLS right now,
* but it doesn't hurt to have this part ready */
for( i = 8; i > ssl_ep_len( ssl ); i-- )
if( ++ssl->in_ctr[i - 1] != 0 )
break;
/* The loop goes to its end iff the counter is wrapping */
if( i == ssl_ep_len( ssl ) )
#if defined(POLARSSL_SSL_PROTO_DTLS)
if( ssl->transport == SSL_TRANSPORT_DATAGRAM )
{
SSL_DEBUG_MSG( 1, ( "incoming message counter would wrap" ) );
return( POLARSSL_ERR_SSL_COUNTER_WRAPPING );
; /* in_ctr handled differently in DTLS */
}
else
#endif
{
for( i = 8; i > ssl_ep_len( ssl ); i-- )
if( ++ssl->in_ctr[i - 1] != 0 )
break;
/* The loop goes to its end iff the counter is wrapping */
if( i == ssl_ep_len( ssl ) )
{
SSL_DEBUG_MSG( 1, ( "incoming message counter would wrap" ) );
return( POLARSSL_ERR_SSL_COUNTER_WRAPPING );
}
}
SSL_DEBUG_MSG( 2, ( "<= decrypt buf" ) );