version 1.64.2.7, 2009/10/31 00:11:22
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version 1.69, 2007/12/15 01:06:12
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/* $OpenLDAP$ */ |
/* $OpenLDAP: pkg/ldap/libraries/libldap/sasl.c,v 1.68 2007/02/05 11:30:40 hyc Exp $ */ |
/* This work is part of OpenLDAP Software <http://www.openldap.org/>. |
/* This work is part of OpenLDAP Software <http://www.openldap.org/>. |
* |
* |
* Copyright 1998-2009 The OpenLDAP Foundation. |
* Copyright 1998-2007 The OpenLDAP Foundation. |
* All rights reserved. |
* All rights reserved. |
* |
* |
* Redistribution and use in source and binary forms, with or without |
* Redistribution and use in source and binary forms, with or without |
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return rc; |
return rc; |
} |
} |
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#ifdef HAVE_CYRUS_SASL |
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#ifdef HAVE_SASL_SASL_H |
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#include <sasl/sasl.h> |
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#else |
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#include <sasl.h> |
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#endif |
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#endif /* HAVE_CYRUS_SASL */ |
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static int |
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sb_sasl_generic_remove( Sockbuf_IO_Desc *sbiod ); |
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static int |
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sb_sasl_generic_setup( Sockbuf_IO_Desc *sbiod, void *arg ) |
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{ |
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struct sb_sasl_generic_data *p; |
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struct sb_sasl_generic_install *i; |
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assert( sbiod != NULL ); |
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i = (struct sb_sasl_generic_install *)arg; |
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p = LBER_MALLOC( sizeof( *p ) ); |
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if ( p == NULL ) |
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return -1; |
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p->ops = i->ops; |
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p->ops_private = i->ops_private; |
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p->sbiod = sbiod; |
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p->flags = 0; |
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ber_pvt_sb_buf_init( &p->sec_buf_in ); |
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ber_pvt_sb_buf_init( &p->buf_in ); |
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ber_pvt_sb_buf_init( &p->buf_out ); |
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sbiod->sbiod_pvt = p; |
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p->ops->init( p, &p->min_send, &p->max_send, &p->max_recv ); |
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if ( ber_pvt_sb_grow_buffer( &p->sec_buf_in, p->min_send ) < 0 ) { |
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sb_sasl_generic_remove( sbiod ); |
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sock_errset(ENOMEM); |
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return -1; |
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} |
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return 0; |
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} |
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static int |
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sb_sasl_generic_remove( Sockbuf_IO_Desc *sbiod ) |
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{ |
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struct sb_sasl_generic_data *p; |
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assert( sbiod != NULL ); |
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p = (struct sb_sasl_generic_data *)sbiod->sbiod_pvt; |
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p->ops->fini(p); |
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ber_pvt_sb_buf_destroy( &p->sec_buf_in ); |
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ber_pvt_sb_buf_destroy( &p->buf_in ); |
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ber_pvt_sb_buf_destroy( &p->buf_out ); |
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LBER_FREE( p ); |
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sbiod->sbiod_pvt = NULL; |
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return 0; |
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} |
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static ber_len_t |
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sb_sasl_generic_pkt_length( |
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struct sb_sasl_generic_data *p, |
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const unsigned char *buf, |
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int debuglevel ) |
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{ |
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ber_len_t size; |
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assert( buf != NULL ); |
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size = buf[0] << 24 |
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| buf[1] << 16 |
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| buf[2] << 8 |
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| buf[3]; |
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if ( size > p->max_recv ) { |
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/* somebody is trying to mess me up. */ |
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ber_log_printf( LDAP_DEBUG_ANY, debuglevel, |
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"sb_sasl_generic_pkt_length: " |
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"received illegal packet length of %lu bytes\n", |
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(unsigned long)size ); |
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size = 16; /* this should lead to an error. */ |
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} |
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return size + 4; /* include the size !!! */ |
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} |
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/* Drop a processed packet from the input buffer */ |
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static void |
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sb_sasl_generic_drop_packet ( |
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struct sb_sasl_generic_data *p, |
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int debuglevel ) |
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{ |
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ber_slen_t len; |
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len = p->sec_buf_in.buf_ptr - p->sec_buf_in.buf_end; |
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if ( len > 0 ) |
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AC_MEMCPY( p->sec_buf_in.buf_base, p->sec_buf_in.buf_base + |
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p->sec_buf_in.buf_end, len ); |
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if ( len >= 4 ) { |
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p->sec_buf_in.buf_end = sb_sasl_generic_pkt_length(p, |
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(unsigned char *) p->sec_buf_in.buf_base, debuglevel); |
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} |
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else { |
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p->sec_buf_in.buf_end = 0; |
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} |
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p->sec_buf_in.buf_ptr = len; |
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} |
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static ber_slen_t |
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sb_sasl_generic_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len) |
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{ |
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struct sb_sasl_generic_data *p; |
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ber_slen_t ret, bufptr; |
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assert( sbiod != NULL ); |
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assert( SOCKBUF_VALID( sbiod->sbiod_sb ) ); |
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p = (struct sb_sasl_generic_data *)sbiod->sbiod_pvt; |
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/* Are there anything left in the buffer? */ |
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ret = ber_pvt_sb_copy_out( &p->buf_in, buf, len ); |
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bufptr = ret; |
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len -= ret; |
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if ( len == 0 ) |
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return bufptr; |
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p->ops->reset_buf( p, &p->buf_in ); |
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/* Read the length of the packet */ |
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while ( p->sec_buf_in.buf_ptr < 4 ) { |
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ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base + |
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p->sec_buf_in.buf_ptr, |
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4 - p->sec_buf_in.buf_ptr ); |
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#ifdef EINTR |
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if ( ( ret < 0 ) && ( errno == EINTR ) ) |
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continue; |
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#endif |
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if ( ret <= 0 ) |
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return bufptr ? bufptr : ret; |
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p->sec_buf_in.buf_ptr += ret; |
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} |
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/* The new packet always starts at p->sec_buf_in.buf_base */ |
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ret = sb_sasl_generic_pkt_length(p, (unsigned char *) p->sec_buf_in.buf_base, |
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sbiod->sbiod_sb->sb_debug ); |
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/* Grow the packet buffer if neccessary */ |
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if ( ( p->sec_buf_in.buf_size < (ber_len_t) ret ) && |
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ber_pvt_sb_grow_buffer( &p->sec_buf_in, ret ) < 0 ) |
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{ |
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sock_errset(ENOMEM); |
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return -1; |
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} |
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p->sec_buf_in.buf_end = ret; |
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/* Did we read the whole encrypted packet? */ |
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while ( p->sec_buf_in.buf_ptr < p->sec_buf_in.buf_end ) { |
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/* No, we have got only a part of it */ |
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ret = p->sec_buf_in.buf_end - p->sec_buf_in.buf_ptr; |
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ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base + |
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p->sec_buf_in.buf_ptr, ret ); |
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#ifdef EINTR |
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if ( ( ret < 0 ) && ( errno == EINTR ) ) |
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continue; |
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#endif |
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if ( ret <= 0 ) |
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return bufptr ? bufptr : ret; |
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p->sec_buf_in.buf_ptr += ret; |
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} |
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/* Decode the packet */ |
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ret = p->ops->decode( p, &p->sec_buf_in, &p->buf_in ); |
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/* Drop the packet from the input buffer */ |
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sb_sasl_generic_drop_packet( p, sbiod->sbiod_sb->sb_debug ); |
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if ( ret != 0 ) { |
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ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug, |
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"sb_sasl_generic_read: failed to decode packet\n" ); |
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sock_errset(EIO); |
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return -1; |
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} |
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bufptr += ber_pvt_sb_copy_out( &p->buf_in, (char*) buf + bufptr, len ); |
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return bufptr; |
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} |
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static ber_slen_t |
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sb_sasl_generic_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len) |
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{ |
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struct sb_sasl_generic_data *p; |
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int ret; |
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ber_len_t len2; |
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assert( sbiod != NULL ); |
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assert( SOCKBUF_VALID( sbiod->sbiod_sb ) ); |
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p = (struct sb_sasl_generic_data *)sbiod->sbiod_pvt; |
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/* Is there anything left in the buffer? */ |
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if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) { |
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ret = ber_pvt_sb_do_write( sbiod, &p->buf_out ); |
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if ( ret < 0 ) return ret; |
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/* Still have something left?? */ |
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if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) { |
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sock_errset(EAGAIN); |
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return -1; |
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} |
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} |
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len2 = p->max_send - 100; /* For safety margin */ |
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len2 = len > len2 ? len2 : len; |
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/* If we're just retrying a partial write, tell the |
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* caller it's done. Let them call again if there's |
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* still more left to write. |
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*/ |
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if ( p->flags & LDAP_PVT_SASL_PARTIAL_WRITE ) { |
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p->flags ^= LDAP_PVT_SASL_PARTIAL_WRITE; |
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return len2; |
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} |
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/* now encode the next packet. */ |
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p->ops->reset_buf( p, &p->buf_out ); |
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ret = p->ops->encode( p, buf, len2, &p->buf_out ); |
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if ( ret != 0 ) { |
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ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug, |
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"sb_sasl_generic_write: failed to encode packet\n" ); |
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sock_errset(EIO); |
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return -1; |
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} |
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ret = ber_pvt_sb_do_write( sbiod, &p->buf_out ); |
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if ( ret < 0 ) { |
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/* error? */ |
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int err = sock_errno(); |
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/* caller can retry this */ |
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if ( err == EAGAIN || err == EWOULDBLOCK || err == EINTR ) |
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p->flags |= LDAP_PVT_SASL_PARTIAL_WRITE; |
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return ret; |
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} else if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) { |
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/* partial write? pretend nothing got written */ |
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len2 = 0; |
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p->flags |= LDAP_PVT_SASL_PARTIAL_WRITE; |
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} |
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/* return number of bytes encoded, not written, to ensure |
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* no byte is encoded twice (even if only sent once). |
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*/ |
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return len2; |
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} |
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static int |
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sb_sasl_generic_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg ) |
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{ |
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struct sb_sasl_generic_data *p; |
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p = (struct sb_sasl_generic_data *)sbiod->sbiod_pvt; |
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if ( opt == LBER_SB_OPT_DATA_READY ) { |
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if ( p->buf_in.buf_ptr != p->buf_in.buf_end ) return 1; |
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} |
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return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg ); |
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} |
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Sockbuf_IO ldap_pvt_sockbuf_io_sasl_generic = { |
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sb_sasl_generic_setup, /* sbi_setup */ |
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sb_sasl_generic_remove, /* sbi_remove */ |
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sb_sasl_generic_ctrl, /* sbi_ctrl */ |
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sb_sasl_generic_read, /* sbi_read */ |
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sb_sasl_generic_write, /* sbi_write */ |
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NULL /* sbi_close */ |
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}; |
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int ldap_pvt_sasl_generic_install( |
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Sockbuf *sb, |
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struct sb_sasl_generic_install *install_arg ) |
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{ |
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Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_generic_install\n", |
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0, 0, 0 ); |
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/* don't install the stuff unless security has been negotiated */ |
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if ( !ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO, |
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&ldap_pvt_sockbuf_io_sasl_generic ) ) |
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{ |
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#ifdef LDAP_DEBUG |
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ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug, |
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LBER_SBIOD_LEVEL_APPLICATION, (void *)"sasl_generic_" ); |
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#endif |
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ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_sasl_generic, |
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LBER_SBIOD_LEVEL_APPLICATION, install_arg ); |
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} |
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return LDAP_SUCCESS; |
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} |
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void ldap_pvt_sasl_generic_remove( Sockbuf *sb ) |
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{ |
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ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_sasl_generic, |
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LBER_SBIOD_LEVEL_APPLICATION ); |
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#ifdef LDAP_DEBUG |
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ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug, |
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LBER_SBIOD_LEVEL_APPLICATION ); |
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#endif |
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} |
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