version 1.1.4.1, 1999/09/10 20:25:26
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version 1.76, 2009/10/26 22:36:39
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/* $OpenLDAP: pkg/ldap/libraries/libldap/sasl.c,v 1.2 1999/09/08 17:06:29 kdz Exp $ */ |
/* $OpenLDAP: pkg/ldap/libraries/libldap/sasl.c,v 1.75 2009/10/26 18:19:20 hyc Exp $ */ |
/* |
/* This work is part of OpenLDAP Software <http://www.openldap.org/>. |
* Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved. |
* |
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file |
* Copyright 1998-2009 The OpenLDAP Foundation. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted only as authorized by the OpenLDAP |
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* Public License. |
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* |
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* A copy of this license is available in the file LICENSE in the |
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* top-level directory of the distribution or, alternatively, at |
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* <http://www.OpenLDAP.org/license.html>. |
*/ |
*/ |
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/* |
/* |
Line 10
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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 HAVE_KERBEROS |
* krbv42ldap [1] OCTET STRING -- OBSOLETE |
* krbv42ldap [1] OCTET STRING |
* krbv42dsa [2] OCTET STRING -- OBSOLETE |
* krbv42dsa [2] OCTET STRING |
|
#endif |
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* sasl [3] SaslCredentials -- LDAPv3 |
* sasl [3] SaslCredentials -- LDAPv3 |
* } |
* } |
* } |
* } |
Line 30
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Line 37
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#include <stdio.h> |
#include <stdio.h> |
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#include <ac/socket.h> |
#include <ac/socket.h> |
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#include <ac/stdlib.h> |
#include <ac/string.h> |
#include <ac/string.h> |
#include <ac/time.h> |
#include <ac/time.h> |
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#include <ac/errno.h> |
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#include "ldap-int.h" |
#include "ldap-int.h" |
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/* |
/* |
* ldap_sasl_bind - bind to the ldap server (and X.500). The dn, mechanism, and |
* ldap_sasl_bind - bind to the ldap server (and X.500). |
* credentials of the entry to which to bind are supplied. The message id |
* The dn (usually NULL), mechanism, and credentials are provided. |
* of the request initiated is provided upon successful (LDAP_SUCCESS) return. |
* The message id of the request initiated is provided upon successful |
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* (LDAP_SUCCESS) return. |
* |
* |
* Example: |
* Example: |
* ldap_sasl_bind( ld, "cn=manager, o=university of michigan, c=us", |
* ldap_sasl_bind( ld, NULL, "mechanism", |
* "mechanism", "secret", NULL, NULL, &msgid ) |
* cred, NULL, NULL, &msgid ) |
*/ |
*/ |
|
|
int |
int |
Line 58 ldap_sasl_bind(
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Line 67 ldap_sasl_bind(
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{ |
{ |
BerElement *ber; |
BerElement *ber; |
int rc; |
int rc; |
|
ber_int_t id; |
|
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Debug( LDAP_DEBUG_TRACE, "ldap_sasl_bind\n", 0, 0, 0 ); |
Debug( LDAP_DEBUG_TRACE, "ldap_sasl_bind\n", 0, 0, 0 ); |
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Line 65 ldap_sasl_bind(
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Line 75 ldap_sasl_bind(
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assert( LDAP_VALID( ld ) ); |
assert( LDAP_VALID( ld ) ); |
assert( msgidp != NULL ); |
assert( msgidp != NULL ); |
|
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if( msgidp == NULL ) { |
/* check client controls */ |
ld->ld_errno = LDAP_PARAM_ERROR; |
rc = ldap_int_client_controls( ld, cctrls ); |
return ld->ld_errno; |
if( rc != LDAP_SUCCESS ) return rc; |
} |
|
|
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if( mechanism != LDAP_SASL_SIMPLE |
if( mechanism == LDAP_SASL_SIMPLE ) { |
&& ld->ld_version < LDAP_VERSION3) |
if( dn == NULL && cred != NULL && cred->bv_len ) { |
{ |
/* use default binddn */ |
|
dn = ld->ld_defbinddn; |
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} |
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|
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} else if( ld->ld_version < LDAP_VERSION3 ) { |
ld->ld_errno = LDAP_NOT_SUPPORTED; |
ld->ld_errno = LDAP_NOT_SUPPORTED; |
return ld->ld_errno; |
return ld->ld_errno; |
} |
} |
|
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if ( dn == NULL ) |
if ( dn == NULL ) { |
dn = ""; |
dn = ""; |
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} |
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/* create a message to send */ |
/* create a message to send */ |
if ( (ber = ldap_alloc_ber_with_options( ld )) == NULL ) { |
if ( (ber = ldap_alloc_ber_with_options( ld )) == NULL ) { |
Line 86 ldap_sasl_bind(
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Line 100 ldap_sasl_bind(
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return ld->ld_errno; |
return ld->ld_errno; |
} |
} |
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assert( BER_VALID( ber ) ); |
assert( LBER_VALID( ber ) ); |
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LDAP_NEXT_MSGID( ld, id ); |
if( mechanism == LDAP_SASL_SIMPLE ) { |
if( mechanism == LDAP_SASL_SIMPLE ) { |
/* simple bind */ |
/* simple bind */ |
rc = ber_printf( ber, "{it{istO}" /*}*/, |
rc = ber_printf( ber, "{it{istON}" /*}*/, |
++ld->ld_msgid, LDAP_REQ_BIND, |
id, LDAP_REQ_BIND, |
ld->ld_version, dn, LDAP_AUTH_SIMPLE, |
ld->ld_version, dn, LDAP_AUTH_SIMPLE, |
cred ); |
cred ); |
|
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} else if ( cred == NULL ) { |
} else if ( cred == NULL || cred->bv_val == NULL ) { |
/* SASL bind w/o creditials */ |
/* SASL bind w/o credentials */ |
rc = ber_printf( ber, "{it{ist{s}}" /*}*/, |
rc = ber_printf( ber, "{it{ist{sN}N}" /*}*/, |
++ld->ld_msgid, LDAP_REQ_BIND, |
id, LDAP_REQ_BIND, |
ld->ld_version, dn, LDAP_AUTH_SASL, |
ld->ld_version, dn, LDAP_AUTH_SASL, |
mechanism ); |
mechanism ); |
|
|
} else { |
} else { |
/* SASL bind w/ creditials */ |
/* SASL bind w/ credentials */ |
rc = ber_printf( ber, "{it{ist{sO}}" /*}*/, |
rc = ber_printf( ber, "{it{ist{sON}N}" /*}*/, |
++ld->ld_msgid, LDAP_REQ_BIND, |
id, LDAP_REQ_BIND, |
ld->ld_version, dn, LDAP_AUTH_SASL, |
ld->ld_version, dn, LDAP_AUTH_SASL, |
mechanism, cred ); |
mechanism, cred ); |
} |
} |
Line 122 ldap_sasl_bind(
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Line 137 ldap_sasl_bind(
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return ld->ld_errno; |
return ld->ld_errno; |
} |
} |
|
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if ( ber_printf( ber, /*{*/ "}" ) == -1 ) { |
if ( ber_printf( ber, /*{*/ "N}" ) == -1 ) { |
ld->ld_errno = LDAP_ENCODING_ERROR; |
ld->ld_errno = LDAP_ENCODING_ERROR; |
ber_free( ber, 1 ); |
ber_free( ber, 1 ); |
return ld->ld_errno; |
return ld->ld_errno; |
} |
} |
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#ifndef LDAP_NOCACHE |
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if ( ld->ld_cache != NULL ) { |
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ldap_flush_cache( ld ); |
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} |
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#endif /* !LDAP_NOCACHE */ |
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/* send the message */ |
/* send the message */ |
*msgidp = ldap_send_initial_request( ld, LDAP_REQ_BIND, dn, ber ); |
*msgidp = ldap_send_initial_request( ld, LDAP_REQ_BIND, dn, ber, id ); |
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if(*msgidp < 0) |
if(*msgidp < 0) |
return ld->ld_errno; |
return ld->ld_errno; |
Line 143 ldap_sasl_bind(
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Line 153 ldap_sasl_bind(
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return LDAP_SUCCESS; |
return LDAP_SUCCESS; |
} |
} |
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/* |
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* ldap_sasl_bind_s - bind to the ldap server (and X.500) using simple |
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* authentication. The dn and password of the entry to which to bind are |
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* supplied. LDAP_SUCCESS is returned upon success, the ldap error code |
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* otherwise. |
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* |
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* Example: |
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* ldap_sasl_bind_s( ld, "cn=manager, o=university of michigan, c=us", |
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* "mechanism", "secret", NULL, NULL, &servercred ) |
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*/ |
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int |
int |
ldap_sasl_bind_s( |
ldap_sasl_bind_s( |
Line 185 ldap_sasl_bind_s(
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Line 185 ldap_sasl_bind_s(
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return( rc ); |
return( rc ); |
} |
} |
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if ( ldap_result( ld, msgid, 1, NULL, &result ) == -1 ) { |
#ifdef LDAP_CONNECTIONLESS |
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if (LDAP_IS_UDP(ld)) { |
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return( rc ); |
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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 ) { |
return( ld->ld_errno ); /* ldap_result sets ld_errno */ |
return( ld->ld_errno ); /* ldap_result sets ld_errno */ |
} |
} |
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Line 195 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 ); |
} |
} |
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if( rc != LDAP_SUCCESS ) { |
if ( rc != LDAP_SUCCESS ) { |
ldap_msgfree( result ); |
ldap_msgfree( result ); |
return( rc ); |
return( rc ); |
} |
} |
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rc = ldap_result2error( ld, result, 1 ); |
rc = ldap_result2error( ld, result, 1 ); |
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if( rc == LDAP_SUCCESS ) { |
if ( rc == LDAP_SUCCESS || rc == LDAP_SASL_BIND_IN_PROGRESS ) { |
if( servercredp != NULL ) { |
if( servercredp != NULL ) { |
*servercredp = scredp; |
*servercredp = scredp; |
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scredp = NULL; |
} |
} |
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} |
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} else if (scredp != NULL ) { |
if ( scredp != NULL ) { |
ber_bvfree(scredp); |
ber_bvfree(scredp); |
} |
} |
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Line 216 ldap_sasl_bind_s(
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Line 224 ldap_sasl_bind_s(
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/* |
/* |
* Parse BindResponse: |
* Parse BindResponse: |
* |
* |
* BindResponse ::= [APPLICATION 1] SEQUENCE { |
* BindResponse ::= [APPLICATION 1] SEQUENCE { |
* COMPONENTS OF LDAPResult, |
* COMPONENTS OF LDAPResult, |
* serverSaslCreds [7] OCTET STRING OPTIONAL } |
* serverSaslCreds [7] OCTET STRING OPTIONAL } |
* |
* |
* LDAPResult ::= SEQUENCE { |
* LDAPResult ::= SEQUENCE { |
* resultCode ENUMERATED, |
* resultCode ENUMERATED, |
* matchedDN LDAPDN, |
* matchedDN LDAPDN, |
* errorMessage LDAPString, |
* errorMessage LDAPString, |
* referral [3] Referral OPTIONAL } |
* referral [3] Referral OPTIONAL } |
*/ |
*/ |
|
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int |
int |
ldap_parse_sasl_bind_result( |
ldap_parse_sasl_bind_result( |
Line 248 ldap_parse_sasl_bind_result(
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Line 256 ldap_parse_sasl_bind_result(
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assert( LDAP_VALID( ld ) ); |
assert( LDAP_VALID( ld ) ); |
assert( res != NULL ); |
assert( res != NULL ); |
|
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if ( ld == NULL || res == NULL ) { |
if( servercredp != NULL ) { |
return LDAP_PARAM_ERROR; |
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} |
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if(servercredp != NULL) { |
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if( ld->ld_version < LDAP_VERSION2 ) { |
if( ld->ld_version < LDAP_VERSION2 ) { |
return LDAP_NOT_SUPPORTED; |
return LDAP_NOT_SUPPORTED; |
} |
} |
*servercredp = NULL; |
*servercredp = NULL; |
} |
} |
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if( res->lm_msgtype == LDAP_RES_BIND ) { |
if( res->lm_msgtype != LDAP_RES_BIND ) { |
ld->ld_errno = LDAP_PARAM_ERROR; |
ld->ld_errno = LDAP_PARAM_ERROR; |
return ld->ld_errno; |
return ld->ld_errno; |
} |
} |
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errcode = LDAP_SUCCESS; |
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scred = NULL; |
scred = NULL; |
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if ( ld->ld_error ) { |
if ( ld->ld_error ) { |
Line 280 ldap_parse_sasl_bind_result(
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Line 283 ldap_parse_sasl_bind_result(
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ber = ber_dup( res->lm_ber ); |
ber = ber_dup( res->lm_ber ); |
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if( ber == NULL ) { |
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ld->ld_errno = LDAP_NO_MEMORY; |
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return ld->ld_errno; |
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} |
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if ( ld->ld_version < LDAP_VERSION2 ) { |
if ( ld->ld_version < LDAP_VERSION2 ) { |
tag = ber_scanf( ber, "{ia}", |
tag = ber_scanf( ber, "{iA}", |
&errcode, &ld->ld_error ); |
&errcode, &ld->ld_error ); |
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if( tag == LBER_ERROR ) { |
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ber_free( ber, 0 ); |
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ld->ld_errno = LDAP_DECODING_ERROR; |
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return ld->ld_errno; |
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} |
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} else { |
} else { |
ber_len_t len; |
ber_len_t len; |
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tag = ber_scanf( ber, "{iaa" /*}*/, |
tag = ber_scanf( ber, "{eAA" /*}*/, |
&errcode, &ld->ld_matched, &ld->ld_error ); |
&errcode, &ld->ld_matched, &ld->ld_error ); |
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if( tag != LBER_ERROR ) { |
if( tag == LBER_ERROR ) { |
tag = ber_peek_tag(ber, &len); |
ber_free( ber, 0 ); |
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ld->ld_errno = LDAP_DECODING_ERROR; |
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return ld->ld_errno; |
} |
} |
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tag = ber_peek_tag(ber, &len); |
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if( tag == LDAP_TAG_REFERRAL ) { |
if( tag == LDAP_TAG_REFERRAL ) { |
/* skip 'em */ |
/* skip 'em */ |
tag = ber_scanf( ber, "x" ); |
if( ber_scanf( ber, "x" ) == LBER_ERROR ) { |
|
ber_free( ber, 0 ); |
if( tag != LBER_ERROR ) { |
ld->ld_errno = LDAP_DECODING_ERROR; |
tag = ber_peek_tag(ber, &len); |
return ld->ld_errno; |
} |
} |
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|
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tag = ber_peek_tag(ber, &len); |
} |
} |
|
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/* need to clean out misc items */ |
|
if( tag == LDAP_TAG_SASL_RES_CREDS ) { |
if( tag == LDAP_TAG_SASL_RES_CREDS ) { |
tag = ber_scanf( ber, "O", &scred ); |
if( ber_scanf( ber, "O", &scred ) == LBER_ERROR ) { |
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ber_free( ber, 0 ); |
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ld->ld_errno = LDAP_DECODING_ERROR; |
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return ld->ld_errno; |
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} |
} |
} |
} |
} |
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if ( tag == LBER_ERROR ) { |
ber_free( ber, 0 ); |
errcode = LDAP_DECODING_ERROR; |
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} |
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if( ber != NULL ) { |
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ber_free( ber, 0 ); |
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} |
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/* return */ |
if ( servercredp != NULL ) { |
if ( errcode == LDAP_SUCCESS && servercredp != NULL ) { |
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*servercredp = scred; |
*servercredp = scred; |
|
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} else if ( scred != NULL ) { |
} else if ( scred != NULL ) { |
ber_bvfree( scred ); |
ber_bvfree( scred ); |
} |
} |
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ld->ld_errno = errcode; |
|
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if ( freeit ) { |
if ( freeit ) { |
ldap_msgfree( res ); |
ldap_msgfree( res ); |
} |
} |
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ld->ld_errno = errcode; |
return( LDAP_SUCCESS ); |
return( ld->ld_errno ); |
} |
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int |
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ldap_pvt_sasl_getmechs ( LDAP *ld, char **pmechlist ) |
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{ |
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/* we need to query the server for supported mechs anyway */ |
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LDAPMessage *res, *e; |
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char *attrs[] = { "supportedSASLMechanisms", NULL }; |
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char **values, *mechlist; |
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int rc; |
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|
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Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_getmech\n", 0, 0, 0 ); |
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|
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rc = ldap_search_s( ld, "", LDAP_SCOPE_BASE, |
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NULL, attrs, 0, &res ); |
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|
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if ( rc != LDAP_SUCCESS ) { |
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return ld->ld_errno; |
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} |
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e = ldap_first_entry( ld, res ); |
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if ( e == NULL ) { |
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ldap_msgfree( res ); |
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if ( ld->ld_errno == LDAP_SUCCESS ) { |
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ld->ld_errno = LDAP_NO_SUCH_OBJECT; |
|
} |
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return ld->ld_errno; |
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} |
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|
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values = ldap_get_values( ld, e, "supportedSASLMechanisms" ); |
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if ( values == NULL ) { |
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ldap_msgfree( res ); |
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ld->ld_errno = LDAP_NO_SUCH_ATTRIBUTE; |
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return ld->ld_errno; |
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} |
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|
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mechlist = ldap_charray2str( values, " " ); |
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if ( mechlist == NULL ) { |
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LDAP_VFREE( values ); |
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ldap_msgfree( res ); |
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ld->ld_errno = LDAP_NO_MEMORY; |
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return ld->ld_errno; |
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} |
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LDAP_VFREE( values ); |
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ldap_msgfree( res ); |
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|
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*pmechlist = mechlist; |
|
|
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return LDAP_SUCCESS; |
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} |
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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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int rc; |
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char *smechs = NULL; |
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|
|
#if defined( LDAP_R_COMPILE ) && defined( HAVE_CYRUS_SASL ) |
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ldap_pvt_thread_mutex_lock( &ldap_int_sasl_mutex ); |
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#endif |
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#ifdef LDAP_CONNECTIONLESS |
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if( LDAP_IS_UDP(ld) ) { |
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/* Just force it to simple bind, silly to make the user |
|
* ask all the time. No, we don't ever actually bind, but I'll |
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* let the final bind handler take care of saving the cdn. |
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*/ |
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rc = ldap_simple_bind( ld, dn, NULL ); |
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rc = rc < 0 ? rc : 0; |
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goto done; |
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} else |
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#endif |
|
|
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#ifdef HAVE_CYRUS_SASL |
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if( mechs == NULL || *mechs == '\0' ) { |
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mechs = ld->ld_options.ldo_def_sasl_mech; |
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} |
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#endif |
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|
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if( mechs == NULL || *mechs == '\0' ) { |
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rc = ldap_pvt_sasl_getmechs( ld, &smechs ); |
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if( rc != LDAP_SUCCESS ) { |
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goto done; |
|
} |
|
|
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Debug( LDAP_DEBUG_TRACE, |
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"ldap_sasl_interactive_bind_s: server supports: %s\n", |
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smechs, 0, 0 ); |
|
|
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mechs = smechs; |
|
|
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} else { |
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Debug( LDAP_DEBUG_TRACE, |
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"ldap_sasl_interactive_bind_s: user selected: %s\n", |
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mechs, 0, 0 ); |
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} |
|
|
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rc = ldap_int_sasl_bind( ld, dn, mechs, |
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serverControls, clientControls, |
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flags, interact, defaults ); |
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|
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done: |
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#if defined( LDAP_R_COMPILE ) && defined( HAVE_CYRUS_SASL ) |
|
ldap_pvt_thread_mutex_unlock( &ldap_int_sasl_mutex ); |
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#endif |
|
if ( smechs ) LDAP_FREE( smechs ); |
|
|
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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 |
|
#include <sasl/sasl.h> |
|
#else |
|
#include <sasl.h> |
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#endif |
|
|
|
#endif /* HAVE_CYRUS_SASL */ |
|
|
|
static int |
|
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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{ |
|
struct sb_sasl_generic_data *p; |
|
struct sb_sasl_generic_install *i; |
|
|
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assert( sbiod != NULL ); |
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|
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i = (struct sb_sasl_generic_install *)arg; |
|
|
|
p = LBER_MALLOC( sizeof( *p ) ); |
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if ( p == NULL ) |
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return -1; |
|
p->ops = i->ops; |
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p->ops_private = i->ops_private; |
|
p->sbiod = sbiod; |
|
p->flags = 0; |
|
ber_pvt_sb_buf_init( &p->sec_buf_in ); |
|
ber_pvt_sb_buf_init( &p->buf_in ); |
|
ber_pvt_sb_buf_init( &p->buf_out ); |
|
|
|
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 ); |
|
sock_errset(ENOMEM); |
|
return -1; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int |
|
sb_sasl_generic_remove( Sockbuf_IO_Desc *sbiod ) |
|
{ |
|
struct sb_sasl_generic_data *p; |
|
|
|
assert( sbiod != NULL ); |
|
|
|
p = (struct sb_sasl_generic_data *)sbiod->sbiod_pvt; |
|
|
|
p->ops->fini(p); |
|
|
|
ber_pvt_sb_buf_destroy( &p->sec_buf_in ); |
|
ber_pvt_sb_buf_destroy( &p->buf_in ); |
|
ber_pvt_sb_buf_destroy( &p->buf_out ); |
|
LBER_FREE( p ); |
|
sbiod->sbiod_pvt = NULL; |
|
return 0; |
|
} |
|
|
|
static ber_len_t |
|
sb_sasl_generic_pkt_length( |
|
struct sb_sasl_generic_data *p, |
|
const unsigned char *buf, |
|
int debuglevel ) |
|
{ |
|
ber_len_t size; |
|
|
|
assert( buf != NULL ); |
|
|
|
size = buf[0] << 24 |
|
| buf[1] << 16 |
|
| buf[2] << 8 |
|
| buf[3]; |
|
|
|
if ( size > p->max_recv ) { |
|
/* somebody is trying to mess me up. */ |
|
ber_log_printf( LDAP_DEBUG_ANY, debuglevel, |
|
"sb_sasl_generic_pkt_length: " |
|
"received illegal packet length of %lu bytes\n", |
|
(unsigned long)size ); |
|
size = 16; /* this should lead to an error. */ |
|
} |
|
|
|
return size + 4; /* include the size !!! */ |
|
} |
|
|
|
/* Drop a processed packet from the input buffer */ |
|
static void |
|
sb_sasl_generic_drop_packet ( |
|
struct sb_sasl_generic_data *p, |
|
int debuglevel ) |
|
{ |
|
ber_slen_t len; |
|
|
|
len = p->sec_buf_in.buf_ptr - p->sec_buf_in.buf_end; |
|
if ( len > 0 ) |
|
AC_MEMCPY( p->sec_buf_in.buf_base, p->sec_buf_in.buf_base + |
|
p->sec_buf_in.buf_end, len ); |
|
|
|
if ( len >= 4 ) { |
|
p->sec_buf_in.buf_end = sb_sasl_generic_pkt_length(p, |
|
(unsigned char *) p->sec_buf_in.buf_base, debuglevel); |
|
} |
|
else { |
|
p->sec_buf_in.buf_end = 0; |
|
} |
|
p->sec_buf_in.buf_ptr = len; |
|
} |
|
|
|
static ber_slen_t |
|
sb_sasl_generic_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len) |
|
{ |
|
struct sb_sasl_generic_data *p; |
|
ber_slen_t ret, bufptr; |
|
|
|
assert( sbiod != NULL ); |
|
assert( SOCKBUF_VALID( sbiod->sbiod_sb ) ); |
|
|
|
p = (struct sb_sasl_generic_data *)sbiod->sbiod_pvt; |
|
|
|
/* Are there anything left in the buffer? */ |
|
ret = ber_pvt_sb_copy_out( &p->buf_in, buf, len ); |
|
bufptr = ret; |
|
len -= ret; |
|
|
|
if ( len == 0 ) |
|
return bufptr; |
|
|
|
p->ops->reset_buf( p, &p->buf_in ); |
|
|
|
/* Read the length of the packet */ |
|
while ( p->sec_buf_in.buf_ptr < 4 ) { |
|
ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base + |
|
p->sec_buf_in.buf_ptr, |
|
4 - p->sec_buf_in.buf_ptr ); |
|
#ifdef EINTR |
|
if ( ( ret < 0 ) && ( errno == EINTR ) ) |
|
continue; |
|
#endif |
|
if ( ret <= 0 ) |
|
return bufptr ? bufptr : ret; |
|
|
|
p->sec_buf_in.buf_ptr += ret; |
|
} |
|
|
|
/* The new packet always starts at p->sec_buf_in.buf_base */ |
|
ret = sb_sasl_generic_pkt_length(p, (unsigned char *) p->sec_buf_in.buf_base, |
|
sbiod->sbiod_sb->sb_debug ); |
|
|
|
/* Grow the packet buffer if neccessary */ |
|
if ( ( p->sec_buf_in.buf_size < (ber_len_t) ret ) && |
|
ber_pvt_sb_grow_buffer( &p->sec_buf_in, ret ) < 0 ) |
|
{ |
|
sock_errset(ENOMEM); |
|
return -1; |
|
} |
|
p->sec_buf_in.buf_end = ret; |
|
|
|
/* Did we read the whole encrypted packet? */ |
|
while ( p->sec_buf_in.buf_ptr < p->sec_buf_in.buf_end ) { |
|
/* No, we have got only a part of it */ |
|
ret = p->sec_buf_in.buf_end - p->sec_buf_in.buf_ptr; |
|
|
|
ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base + |
|
p->sec_buf_in.buf_ptr, ret ); |
|
#ifdef EINTR |
|
if ( ( ret < 0 ) && ( errno == EINTR ) ) |
|
continue; |
|
#endif |
|
if ( ret <= 0 ) |
|
return bufptr ? bufptr : ret; |
|
|
|
p->sec_buf_in.buf_ptr += ret; |
|
} |
|
|
|
/* Decode the packet */ |
|
ret = p->ops->decode( p, &p->sec_buf_in, &p->buf_in ); |
|
|
|
/* Drop the packet from the input buffer */ |
|
sb_sasl_generic_drop_packet( p, sbiod->sbiod_sb->sb_debug ); |
|
|
|
if ( ret != 0 ) { |
|
ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug, |
|
"sb_sasl_generic_read: failed to decode packet\n" ); |
|
sock_errset(EIO); |
|
return -1; |
|
} |
|
|
|
bufptr += ber_pvt_sb_copy_out( &p->buf_in, (char*) buf + bufptr, len ); |
|
|
|
return bufptr; |
|
} |
|
|
|
static ber_slen_t |
|
sb_sasl_generic_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len) |
|
{ |
|
struct sb_sasl_generic_data *p; |
|
int ret; |
|
ber_len_t len2; |
|
|
|
assert( sbiod != NULL ); |
|
assert( SOCKBUF_VALID( sbiod->sbiod_sb ) ); |
|
|
|
p = (struct sb_sasl_generic_data *)sbiod->sbiod_pvt; |
|
|
|
/* Is there anything left in the buffer? */ |
|
if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) { |
|
ret = ber_pvt_sb_do_write( sbiod, &p->buf_out ); |
|
if ( ret < 0 ) return ret; |
|
|
|
/* Still have something left?? */ |
|
if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) { |
|
sock_errset(EAGAIN); |
|
return -1; |
|
} |
|
} |
|
|
|
len2 = p->max_send - 100; /* For safety margin */ |
|
len2 = len > len2 ? len2 : len; |
|
|
|
/* If we're just retrying a partial write, tell the |
|
* caller it's done. Let them call again if there's |
|
* still more left to write. |
|
*/ |
|
if ( p->flags & LDAP_PVT_SASL_PARTIAL_WRITE ) { |
|
p->flags ^= LDAP_PVT_SASL_PARTIAL_WRITE; |
|
return len2; |
|
} |
|
|
|
/* now encode the next packet. */ |
|
p->ops->reset_buf( p, &p->buf_out ); |
|
|
|
ret = p->ops->encode( p, buf, len2, &p->buf_out ); |
|
|
|
if ( ret != 0 ) { |
|
ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug, |
|
"sb_sasl_generic_write: failed to encode packet\n" ); |
|
sock_errset(EIO); |
|
return -1; |
|
} |
|
|
|
ret = ber_pvt_sb_do_write( sbiod, &p->buf_out ); |
|
|
|
if ( ret < 0 ) { |
|
/* error? */ |
|
int err = sock_errno(); |
|
/* caller can retry this */ |
|
if ( err == EAGAIN ) |
|
p->flags |= LDAP_PVT_SASL_PARTIAL_WRITE; |
|
return ret; |
|
} else if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) { |
|
/* partial write? pretend nothing got written */ |
|
len2 = 0; |
|
p->flags |= LDAP_PVT_SASL_PARTIAL_WRITE; |
|
} |
|
|
|
/* return number of bytes encoded, not written, to ensure |
|
* no byte is encoded twice (even if only sent once). |
|
*/ |
|
return len2; |
|
} |
|
|
|
static int |
|
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 |
} |
} |