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Better SASL_MAXBUF fix

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This commit is contained in:
Howard Chu 2002-06-07 03:40:16 +00:00
parent 018ace0c50
commit 8101798791
1 changed files with 16 additions and 18 deletions
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34
libraries/libldap/cyrus.c
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@ -92,6 +92,7 @@ int ldap_int_sasl_init( void )
struct sb_sasl_data {
sasl_conn_t *sasl_context;
unsigned *sasl_maxbuf;
Sockbuf_Buf sec_buf_in;
Sockbuf_Buf buf_in;
Sockbuf_Buf buf_out;
@ -112,9 +113,12 @@ sb_sasl_setup( Sockbuf_IO_Desc *sbiod, void *arg )
ber_pvt_sb_buf_init( &p->buf_in );
ber_pvt_sb_buf_init( &p->buf_out );
if ( ber_pvt_sb_grow_buffer( &p->sec_buf_in, SASL_MIN_BUFF_SIZE ) < 0 ) {
LBER_FREE( p );
errno = ENOMEM;
return -1;
}
sasl_getprop( p->sasl_context, SASL_MAXOUTBUF,
(SASL_CONST void **) &p->sasl_maxbuf );
sbiod->sbiod_pvt = p;
@ -146,7 +150,7 @@ sb_sasl_remove( Sockbuf_IO_Desc *sbiod )
}
static ber_len_t
sb_sasl_pkt_length( const unsigned char *buf, int debuglevel )
sb_sasl_pkt_length( const unsigned char *buf, unsigned max, int debuglevel )
{
ber_len_t size;
@ -157,10 +161,7 @@ sb_sasl_pkt_length( const unsigned char *buf, int debuglevel )
| buf[2] << 8
| buf[3];
/* we really should check against actual buffer size set
* in the secopts.
*/
if ( size > SASL_MAX_BUFF_SIZE ) {
if ( size > max ) {
/* somebody is trying to mess me up. */
ber_log_printf( LDAP_DEBUG_ANY, debuglevel,
"sb_sasl_pkt_length: received illegal packet length "
@ -173,7 +174,7 @@ sb_sasl_pkt_length( const unsigned char *buf, int debuglevel )
/* Drop a processed packet from the input buffer */
static void
sb_sasl_drop_packet ( Sockbuf_Buf *sec_buf_in, int debuglevel )
sb_sasl_drop_packet ( Sockbuf_Buf *sec_buf_in, unsigned max, int debuglevel )
{
ber_slen_t len;
@ -184,7 +185,7 @@ sb_sasl_drop_packet ( Sockbuf_Buf *sec_buf_in, int debuglevel )
if ( len >= 4 ) {
sec_buf_in->buf_end = sb_sasl_pkt_length( sec_buf_in->buf_base,
debuglevel);
max, debuglevel);
}
else {
sec_buf_in->buf_end = 0;
@ -233,7 +234,7 @@ sb_sasl_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
/* The new packet always starts at p->sec_buf_in.buf_base */
ret = sb_sasl_pkt_length( p->sec_buf_in.buf_base,
sbiod->sbiod_sb->sb_debug );
*p->sasl_maxbuf, sbiod->sbiod_sb->sb_debug );
/* Grow the packet buffer if neccessary */
if ( ( p->sec_buf_in.buf_size < (ber_len_t) ret ) &&
@ -266,19 +267,19 @@ sb_sasl_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
p->sec_buf_in.buf_end,
(SASL_CONST char **)&p->buf_in.buf_base,
(unsigned *)&p->buf_in.buf_end );
/* Drop the packet from the input buffer */
sb_sasl_drop_packet( &p->sec_buf_in,
*p->sasl_maxbuf, sbiod->sbiod_sb->sb_debug );
if ( ret != SASL_OK ) {
ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug,
"sb_sasl_read: failed to decode packet: %s\n",
sasl_errstring( ret, NULL, NULL ) );
sb_sasl_drop_packet( &p->sec_buf_in,
sbiod->sbiod_sb->sb_debug );
errno = EIO;
return -1;
}
/* Drop the packet from the input buffer */
sb_sasl_drop_packet( &p->sec_buf_in, sbiod->sbiod_sb->sb_debug );
p->buf_in.buf_size = p->buf_in.buf_end;
bufptr += ber_pvt_sb_copy_out( &p->buf_in, (char*) buf + bufptr, len );
@ -291,7 +292,6 @@ sb_sasl_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
{
struct sb_sasl_data *p;
int ret;
unsigned *max;
assert( sbiod != NULL );
assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
@ -308,13 +308,11 @@ sb_sasl_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
/* now encode the next packet. */
#if SASL_VERSION_MAJOR >= 2
ber_pvt_sb_buf_init( &p->buf_out );
sasl_getprop( p->sasl_context, SASL_MAXOUTBUF, (const void **)&max );
#else
ber_pvt_sb_buf_destroy( &p->buf_out );
sasl_getprop( p->sasl_context, SASL_MAXOUTBUF, (void **)&max );
#endif
if ( len > *max - 100 )
len = *max - 100; /* For safety margin */
if ( len > *p->sasl_maxbuf - 100 )
len = *p->sasl_maxbuf - 100; /* For safety margin */
ret = sasl_encode( p->sasl_context, buf, len,
(SASL_CONST char **)&p->buf_out.buf_base,
(unsigned *)&p->buf_out.buf_size );