version 1.58.2.3, 2005/11/14 18:06:06
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version 1.84, 2011/01/04 23:43:05
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/* $OpenLDAP: pkg/ldap/libraries/libldap/sasl.c,v 1.58.2.2 2005/08/10 21:57:17 kurt Exp $ */ |
/* $OpenLDAP: pkg/ldap/libraries/libldap/sasl.c,v 1.83 2010/10/13 23:47:09 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 1998-2005 The OpenLDAP Foundation. |
* Copyright 1998-2011 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 |
Line 12
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Line 12
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* top-level directory of the distribution or, alternatively, at |
* top-level directory of the distribution or, alternatively, at |
* <http://www.OpenLDAP.org/license.html>. |
* <http://www.OpenLDAP.org/license.html>. |
*/ |
*/ |
/* Portions Copyright (C) The Internet Society (1997) |
|
* ASN.1 fragments are from RFC 2251; see RFC for full legal notices. |
|
*/ |
|
|
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/* |
/* |
* BindRequest ::= SEQUENCE { |
* BindRequest ::= SEQUENCE { |
Line 22
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Line 19
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* name DistinguishedName, -- who |
* name DistinguishedName, -- who |
* authentication CHOICE { |
* authentication CHOICE { |
* simple [0] OCTET STRING -- passwd |
* simple [0] OCTET STRING -- passwd |
#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND |
* krbv42ldap [1] OCTET STRING -- OBSOLETE |
* krbv42ldap [1] OCTET STRING |
* krbv42dsa [2] OCTET STRING -- OBSOLETE |
* krbv42dsa [2] OCTET STRING |
|
#endif |
|
* sasl [3] SaslCredentials -- LDAPv3 |
* sasl [3] SaslCredentials -- LDAPv3 |
* } |
* } |
* } |
* } |
Line 196 ldap_sasl_bind_s(
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Line 191 ldap_sasl_bind_s(
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} |
} |
#endif |
#endif |
|
|
if ( ldap_result( ld, msgid, 1, NULL, &result ) == -1 ) { |
if ( ldap_result( ld, msgid, LDAP_MSG_ALL, NULL, &result ) == -1 || !result ) { |
return( ld->ld_errno ); /* ldap_result sets ld_errno */ |
return( ld->ld_errno ); /* ldap_result sets ld_errno */ |
} |
} |
|
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Line 206 ldap_sasl_bind_s(
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Line 201 ldap_sasl_bind_s(
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rc = ldap_parse_sasl_bind_result( ld, result, &scredp, 0 ); |
rc = ldap_parse_sasl_bind_result( ld, result, &scredp, 0 ); |
} |
} |
|
|
if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) { |
if ( rc != LDAP_SUCCESS ) { |
ldap_msgfree( result ); |
ldap_msgfree( result ); |
return( rc ); |
return( rc ); |
} |
} |
Line 294 ldap_parse_sasl_bind_result(
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Line 289 ldap_parse_sasl_bind_result(
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} |
} |
|
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if ( ld->ld_version < LDAP_VERSION2 ) { |
if ( ld->ld_version < LDAP_VERSION2 ) { |
#ifdef LDAP_NULL_IS_NULL |
|
tag = ber_scanf( ber, "{iA}", |
tag = ber_scanf( ber, "{iA}", |
&errcode, &ld->ld_error ); |
&errcode, &ld->ld_error ); |
#else /* ! LDAP_NULL_IS_NULL */ |
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tag = ber_scanf( ber, "{ia}", |
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&errcode, &ld->ld_error ); |
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#endif /* ! LDAP_NULL_IS_NULL */ |
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|
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if( tag == LBER_ERROR ) { |
if( tag == LBER_ERROR ) { |
ber_free( ber, 0 ); |
ber_free( ber, 0 ); |
Line 311 ldap_parse_sasl_bind_result(
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Line 301 ldap_parse_sasl_bind_result(
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} else { |
} else { |
ber_len_t len; |
ber_len_t len; |
|
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#ifdef LDAP_NULL_IS_NULL |
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tag = ber_scanf( ber, "{eAA" /*}*/, |
tag = ber_scanf( ber, "{eAA" /*}*/, |
&errcode, &ld->ld_matched, &ld->ld_error ); |
&errcode, &ld->ld_matched, &ld->ld_error ); |
#else /* ! LDAP_NULL_IS_NULL */ |
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tag = ber_scanf( ber, "{eaa" /*}*/, |
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&errcode, &ld->ld_matched, &ld->ld_error ); |
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#endif /* ! LDAP_NULL_IS_NULL */ |
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if( tag == LBER_ERROR ) { |
if( tag == LBER_ERROR ) { |
ber_free( ber, 0 ); |
ber_free( ber, 0 ); |
Line 362 ldap_parse_sasl_bind_result(
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Line 347 ldap_parse_sasl_bind_result(
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ldap_msgfree( res ); |
ldap_msgfree( res ); |
} |
} |
|
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return( ld->ld_errno ); |
return( LDAP_SUCCESS ); |
} |
} |
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int |
int |
Line 416 ldap_pvt_sasl_getmechs ( LDAP *ld, char
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Line 401 ldap_pvt_sasl_getmechs ( LDAP *ld, char
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} |
} |
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/* |
/* |
* ldap_sasl_interactive_bind_s - interactive SASL authentication |
* ldap_sasl_interactive_bind - interactive SASL authentication |
* |
* |
* This routine uses interactive callbacks. |
* This routine uses interactive callbacks. |
* |
* |
* LDAP_SUCCESS is returned upon success, the ldap error code |
* LDAP_SUCCESS is returned upon success, the ldap error code |
* otherwise. |
* otherwise. LDAP_SASL_BIND_IN_PROGRESS is returned if further |
|
* calls are needed. |
*/ |
*/ |
int |
int |
ldap_sasl_interactive_bind_s( |
ldap_sasl_interactive_bind( |
LDAP *ld, |
LDAP *ld, |
LDAP_CONST char *dn, /* usually NULL */ |
LDAP_CONST char *dn, /* usually NULL */ |
LDAP_CONST char *mechs, |
LDAP_CONST char *mechs, |
Line 432 ldap_sasl_interactive_bind_s(
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Line 418 ldap_sasl_interactive_bind_s(
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LDAPControl **clientControls, |
LDAPControl **clientControls, |
unsigned flags, |
unsigned flags, |
LDAP_SASL_INTERACT_PROC *interact, |
LDAP_SASL_INTERACT_PROC *interact, |
void *defaults ) |
void *defaults, |
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LDAPMessage *result, |
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const char **rmech, |
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int *msgid ) |
{ |
{ |
int rc; |
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char *smechs = NULL; |
char *smechs = NULL; |
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int rc; |
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#if defined( LDAP_R_COMPILE ) && defined( HAVE_CYRUS_SASL ) |
#if defined( HAVE_CYRUS_SASL ) |
ldap_pvt_thread_mutex_lock( &ldap_int_sasl_mutex ); |
LDAP_MUTEX_LOCK( &ldap_int_sasl_mutex ); |
#endif |
#endif |
#ifdef LDAP_CONNECTIONLESS |
#ifdef LDAP_CONNECTIONLESS |
if( LDAP_IS_UDP(ld) ) { |
if( LDAP_IS_UDP(ld) ) { |
Line 452 ldap_sasl_interactive_bind_s(
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Line 441 ldap_sasl_interactive_bind_s(
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} else |
} else |
#endif |
#endif |
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/* First time */ |
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if ( !result ) { |
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#ifdef HAVE_CYRUS_SASL |
#ifdef HAVE_CYRUS_SASL |
if( mechs == NULL || *mechs == '\0' ) { |
if( mechs == NULL || *mechs == '\0' ) { |
mechs = ld->ld_options.ldo_def_sasl_mech; |
mechs = ld->ld_options.ldo_def_sasl_mech; |
Line 459 ldap_sasl_interactive_bind_s(
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Line 451 ldap_sasl_interactive_bind_s(
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#endif |
#endif |
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if( mechs == NULL || *mechs == '\0' ) { |
if( mechs == NULL || *mechs == '\0' ) { |
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/* FIXME: this needs to be asynchronous too; |
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* perhaps NULL should be disallowed for async usage? |
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*/ |
rc = ldap_pvt_sasl_getmechs( ld, &smechs ); |
rc = ldap_pvt_sasl_getmechs( ld, &smechs ); |
if( rc != LDAP_SUCCESS ) { |
if( rc != LDAP_SUCCESS ) { |
goto done; |
goto done; |
} |
} |
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Debug( LDAP_DEBUG_TRACE, |
Debug( LDAP_DEBUG_TRACE, |
"ldap_sasl_interactive_bind_s: server supports: %s\n", |
"ldap_sasl_interactive_bind: server supports: %s\n", |
smechs, 0, 0 ); |
smechs, 0, 0 ); |
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mechs = smechs; |
mechs = smechs; |
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} else { |
} else { |
Debug( LDAP_DEBUG_TRACE, |
Debug( LDAP_DEBUG_TRACE, |
"ldap_sasl_interactive_bind_s: user selected: %s\n", |
"ldap_sasl_interactive_bind: user selected: %s\n", |
mechs, 0, 0 ); |
mechs, 0, 0 ); |
} |
} |
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} |
rc = ldap_int_sasl_bind( ld, dn, mechs, |
rc = ldap_int_sasl_bind( ld, dn, mechs, |
serverControls, clientControls, |
serverControls, clientControls, |
flags, interact, defaults ); |
flags, interact, defaults, result, rmech, msgid ); |
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done: |
done: |
#if defined( LDAP_R_COMPILE ) && defined( HAVE_CYRUS_SASL ) |
#if defined( HAVE_CYRUS_SASL ) |
ldap_pvt_thread_mutex_unlock( &ldap_int_sasl_mutex ); |
LDAP_MUTEX_UNLOCK( &ldap_int_sasl_mutex ); |
#endif |
#endif |
if ( smechs ) LDAP_FREE( smechs ); |
if ( smechs ) LDAP_FREE( smechs ); |
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return rc; |
return rc; |
} |
} |
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/* |
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* ldap_sasl_interactive_bind_s - interactive SASL authentication |
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* |
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* This routine uses interactive callbacks. |
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* |
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* LDAP_SUCCESS is returned upon success, the ldap error code |
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* otherwise. |
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*/ |
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int |
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ldap_sasl_interactive_bind_s( |
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LDAP *ld, |
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LDAP_CONST char *dn, /* usually NULL */ |
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LDAP_CONST char *mechs, |
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LDAPControl **serverControls, |
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LDAPControl **clientControls, |
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unsigned flags, |
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LDAP_SASL_INTERACT_PROC *interact, |
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void *defaults ) |
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{ |
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const char *rmech = NULL; |
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LDAPMessage *result = NULL; |
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int rc, msgid; |
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do { |
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rc = ldap_sasl_interactive_bind( ld, dn, mechs, |
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serverControls, clientControls, |
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flags, interact, defaults, result, &rmech, &msgid ); |
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ldap_msgfree( result ); |
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if ( rc != LDAP_SASL_BIND_IN_PROGRESS ) |
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break; |
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#ifdef LDAP_CONNECTIONLESS |
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if (LDAP_IS_UDP(ld)) { |
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break; |
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} |
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#endif |
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if ( ldap_result( ld, msgid, LDAP_MSG_ALL, NULL, &result ) == -1 || !result ) { |
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return( ld->ld_errno ); /* ldap_result sets ld_errno */ |
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} |
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} while ( rc == LDAP_SASL_BIND_IN_PROGRESS ); |
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return rc; |
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} |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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ret = p->ops->encode( p, buf, len2, &p->buf_out ); |
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|
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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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|
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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 */ |
|
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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p->flags |= LDAP_PVT_SASL_PARTIAL_WRITE; |
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sock_errset(EAGAIN); |
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len2 = -1; |
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} |
|
|
|
/* return number of bytes encoded, not written, to ensure |
|
* no byte is encoded twice (even if only sent once). |
|
*/ |
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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 ) |
|
{ |
|
struct sb_sasl_generic_data *p; |
|
|
|
p = (struct sb_sasl_generic_data *)sbiod->sbiod_pvt; |
|
|
|
if ( opt == LBER_SB_OPT_DATA_READY ) { |
|
if ( p->buf_in.buf_ptr != p->buf_in.buf_end ) return 1; |
|
} |
|
|
|
return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg ); |
|
} |
|
|
|
Sockbuf_IO ldap_pvt_sockbuf_io_sasl_generic = { |
|
sb_sasl_generic_setup, /* sbi_setup */ |
|
sb_sasl_generic_remove, /* sbi_remove */ |
|
sb_sasl_generic_ctrl, /* sbi_ctrl */ |
|
sb_sasl_generic_read, /* sbi_read */ |
|
sb_sasl_generic_write, /* sbi_write */ |
|
NULL /* sbi_close */ |
|
}; |
|
|
|
int ldap_pvt_sasl_generic_install( |
|
Sockbuf *sb, |
|
struct sb_sasl_generic_install *install_arg ) |
|
{ |
|
Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_generic_install\n", |
|
0, 0, 0 ); |
|
|
|
/* don't install the stuff unless security has been negotiated */ |
|
|
|
if ( !ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO, |
|
&ldap_pvt_sockbuf_io_sasl_generic ) ) |
|
{ |
|
#ifdef LDAP_DEBUG |
|
ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug, |
|
LBER_SBIOD_LEVEL_APPLICATION, (void *)"sasl_generic_" ); |
|
#endif |
|
ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_sasl_generic, |
|
LBER_SBIOD_LEVEL_APPLICATION, install_arg ); |
|
} |
|
|
|
return LDAP_SUCCESS; |
|
} |
|
|
|
void ldap_pvt_sasl_generic_remove( Sockbuf *sb ) |
|
{ |
|
ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_sasl_generic, |
|
LBER_SBIOD_LEVEL_APPLICATION ); |
|
#ifdef LDAP_DEBUG |
|
ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug, |
|
LBER_SBIOD_LEVEL_APPLICATION ); |
|
#endif |
|
} |