version 1.1.4.1, 1999/09/10 20:25:26
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version 1.24, 2000/06/01 20:01:01
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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 1.23 2000/06/01 18:59:22 kurt Exp $ */ |
/* |
/* |
* Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved. |
* Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved. |
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file |
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file |
*/ |
*/ |
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Line 10
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Line 10
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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 |
#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND |
* krbv42ldap [1] OCTET STRING |
* krbv42ldap [1] OCTET STRING |
* krbv42dsa [2] OCTET STRING |
* krbv42dsa [2] OCTET STRING |
#endif |
#endif |
Line 32
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Line 32
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#include <ac/socket.h> |
#include <ac/socket.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 ) |
*/ |
*/ |
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int |
int |
Line 70 ldap_sasl_bind(
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Line 72 ldap_sasl_bind(
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return ld->ld_errno; |
return ld->ld_errno; |
} |
} |
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if( mechanism != LDAP_SASL_SIMPLE |
if( mechanism == LDAP_SASL_SIMPLE ) { |
&& ld->ld_version < LDAP_VERSION3) |
if( dn == NULL && cred != NULL ) { |
{ |
/* use default binddn */ |
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dn = ld->ld_defbinddn; |
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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 143 ldap_sasl_bind(
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Line 150 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 195 ldap_sasl_bind_s(
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Line 192 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 && rc != LDAP_SASL_BIND_IN_PROGRESS ) { |
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 215 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 252 ldap_parse_sasl_bind_result(
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Line 251 ldap_parse_sasl_bind_result(
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return LDAP_PARAM_ERROR; |
return LDAP_PARAM_ERROR; |
} |
} |
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if(servercredp != NULL) { |
if( servercredp != NULL ) { |
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 278 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, "{iaa" /*}*/, |
&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 ) { |
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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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tag = ber_peek_tag(ber, &len); |
} |
} |
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/* need to clean out misc items */ |
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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; |
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return( ld->ld_errno ); |
return( ld->ld_errno ); |
} |
} |
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#ifdef HAVE_CYRUS_SASL |
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/* |
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* Various Cyrus SASL related stuff. |
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*/ |
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#define MAX_BUFF_SIZE 65536 |
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#define MIN_BUFF_SIZE 4096 |
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static char * |
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array2str( char **a ) |
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{ |
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char *s, **v, *p; |
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int len = 0; |
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for ( v = a; *v != NULL; v++ ) { |
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len += strlen( *v ) + 1; /* for a space */ |
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} |
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if ( len == 0 ) { |
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return NULL; |
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} |
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s = LDAP_MALLOC ( len ); /* last space holds \0 */ |
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if ( s == NULL ) { |
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return NULL; |
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} |
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p = s; |
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for ( v = a; *v != NULL; v++ ) { |
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int len; |
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if ( v != a ) { |
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strncpy( p, " ", 1 ); |
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++p; |
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} |
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len = strlen( *v ); |
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strncpy( p, *v, len ); |
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p += len; |
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} |
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*p = '\0'; |
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return s; |
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} |
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int ldap_pvt_sasl_init( void ) |
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{ |
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/* XXX not threadsafe */ |
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static int sasl_initialized = 0; |
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if ( sasl_initialized ) { |
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return 0; |
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} |
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#ifndef CSRIMALLOC |
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sasl_set_alloc( ber_memalloc, ber_memcalloc, ber_memrealloc, ber_memfree ); |
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#endif /* CSRIMALLOC */ |
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if ( sasl_client_init( NULL ) == SASL_OK ) { |
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sasl_initialized = 1; |
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return 0; |
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} |
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return -1; |
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} |
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/* |
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* SASL encryption support for LBER Sockbufs |
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*/ |
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struct sb_sasl_data { |
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sasl_conn_t *sasl_context; |
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Sockbuf_Buf sec_buf_in; |
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Sockbuf_Buf buf_in; |
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Sockbuf_Buf buf_out; |
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}; |
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static int |
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sb_sasl_setup( Sockbuf_IO_Desc *sbiod, void *arg ) |
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{ |
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struct sb_sasl_data *p; |
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assert( sbiod != NULL ); |
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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->sasl_context = (sasl_conn_t *)arg; |
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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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if ( ber_pvt_sb_grow_buffer( &p->sec_buf_in, MIN_BUFF_SIZE ) < 0 ) { |
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errno = ENOMEM; |
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return -1; |
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} |
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sbiod->sbiod_pvt = p; |
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return 0; |
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} |
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static int |
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sb_sasl_remove( Sockbuf_IO_Desc *sbiod ) |
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{ |
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struct sb_sasl_data *p; |
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assert( sbiod != NULL ); |
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p = (struct sb_sasl_data *)sbiod->sbiod_pvt; |
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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_pkt_length( const char *buf, int debuglevel ) |
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{ |
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ber_len_t size; |
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long tmp; |
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assert( buf != NULL ); |
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tmp = *((long *)buf); |
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size = ntohl( tmp ); |
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if ( size > MAX_BUFF_SIZE ) { |
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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_pkt_length: received illegal packet length " |
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"of %lu bytes\n", (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_drop_packet ( Sockbuf_Buf *sec_buf_in, int debuglevel ) |
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{ |
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ber_slen_t len; |
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len = sec_buf_in->buf_ptr - sec_buf_in->buf_end; |
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if ( len > 0 ) |
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memmove( sec_buf_in->buf_base, sec_buf_in->buf_base + |
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sec_buf_in->buf_end, len ); |
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if ( len >= 4 ) { |
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sec_buf_in->buf_end = sb_sasl_pkt_length( sec_buf_in->buf_base, |
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debuglevel); |
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} |
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else { |
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sec_buf_in->buf_end = 0; |
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} |
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sec_buf_in->buf_ptr = len; |
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} |
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static ber_slen_t |
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sb_sasl_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len) |
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{ |
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struct sb_sasl_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_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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ber_pvt_sb_buf_destroy( &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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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 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_pkt_length( 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 < ret ) && |
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ber_pvt_sb_grow_buffer( &p->sec_buf_in, ret ) < 0 ) { |
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errno = 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 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 = sasl_decode( p->sasl_context, p->sec_buf_in.buf_base, |
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p->sec_buf_in.buf_end, &p->buf_in.buf_base, |
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(unsigned *)&p->buf_in.buf_end ); |
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if ( ret != SASL_OK ) { |
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ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug, |
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"sb_sasl_read: failed to decode packet: %s\n", |
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sasl_errstring( ret, NULL, NULL ) ); |
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sb_sasl_drop_packet( &p->sec_buf_in, |
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sbiod->sbiod_sb->sb_debug ); |
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errno = EIO; |
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return -1; |
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} |
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/* Drop the packet from the input buffer */ |
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sb_sasl_drop_packet( &p->sec_buf_in, sbiod->sbiod_sb->sb_debug ); |
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p->buf_in.buf_size = p->buf_in.buf_end; |
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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_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len) |
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{ |
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struct sb_sasl_data *p; |
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int ret; |
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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_data *)sbiod->sbiod_pvt; |
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/* Are 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 ) |
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return ret; |
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} |
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/* now encode the next packet. */ |
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ber_pvt_sb_buf_destroy( &p->buf_out ); |
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ret = sasl_encode( p->sasl_context, buf, len, &p->buf_out.buf_base, |
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(unsigned *)&p->buf_out.buf_size ); |
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if ( ret != SASL_OK ) { |
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ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug, |
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"sb_sasl_write: failed to encode packet: %s\n", |
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sasl_errstring( ret, NULL, NULL ) ); |
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return -1; |
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} |
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p->buf_out.buf_end = p->buf_out.buf_size; |
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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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return ret; |
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return len; |
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} |
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static int |
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sb_sasl_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg ) |
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{ |
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struct sb_sasl_data *p; |
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p = (struct sb_sasl_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 ) |
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return 1; |
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} |
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|
|
return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg ); |
|
} |
|
|
|
Sockbuf_IO ldap_pvt_sockbuf_io_sasl = |
|
{ |
|
sb_sasl_setup, /* sbi_setup */ |
|
sb_sasl_remove, /* sbi_remove */ |
|
sb_sasl_ctrl, /* sbi_ctrl */ |
|
sb_sasl_read, /* sbi_read */ |
|
sb_sasl_write, /* sbi_write */ |
|
NULL /* sbi_close */ |
|
}; |
|
|
|
int ldap_pvt_sasl_install( Sockbuf *sb, void *ctx_arg ) |
|
{ |
|
/* 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 ) ) |
|
ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_sasl, |
|
LBER_SBIOD_LEVEL_APPLICATION, ctx_arg ); |
|
|
|
return LDAP_SUCCESS; |
|
} |
|
|
|
static int |
|
sasl_err2ldap( int saslerr ) |
|
{ |
|
int rc; |
|
|
|
switch (saslerr) { |
|
case SASL_CONTINUE: |
|
rc = LDAP_MORE_RESULTS_TO_RETURN; |
|
break; |
|
case SASL_OK: |
|
rc = LDAP_SUCCESS; |
|
break; |
|
case SASL_FAIL: |
|
rc = LDAP_LOCAL_ERROR; |
|
break; |
|
case SASL_NOMEM: |
|
rc = LDAP_NO_MEMORY; |
|
break; |
|
case SASL_NOMECH: |
|
rc = LDAP_AUTH_UNKNOWN; |
|
break; |
|
case SASL_BADAUTH: |
|
rc = LDAP_AUTH_UNKNOWN; |
|
break; |
|
case SASL_NOAUTHZ: |
|
rc = LDAP_PARAM_ERROR; |
|
break; |
|
case SASL_TOOWEAK: |
|
case SASL_ENCRYPT: |
|
rc = LDAP_AUTH_UNKNOWN; |
|
break; |
|
default: |
|
rc = LDAP_LOCAL_ERROR; |
|
break; |
|
} |
|
|
|
assert( rc == LDAP_SUCCESS || LDAP_API_ERROR( rc ) ); |
|
return rc; |
|
} |
|
|
|
int |
|
ldap_pvt_sasl_getmechs ( LDAP *ld, char **pmechlist ) |
|
{ |
|
/* we need to query the server for supported mechs anyway */ |
|
LDAPMessage *res, *e; |
|
char *attrs[] = { "supportedSASLMechanisms", NULL }; |
|
char **values, *mechlist; |
|
int rc; |
|
|
|
Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_getmech\n", 0, 0, 0 ); |
|
|
|
rc = ldap_search_s( ld, NULL, LDAP_SCOPE_BASE, |
|
NULL, attrs, 0, &res ); |
|
|
|
if ( rc != LDAP_SUCCESS ) { |
|
return ld->ld_errno; |
|
} |
|
|
|
e = ldap_first_entry( ld, res ); |
|
if ( e == NULL ) { |
|
if ( ld->ld_errno == LDAP_SUCCESS ) { |
|
ld->ld_errno = LDAP_UNAVAILABLE; |
|
} |
|
return ld->ld_errno; |
|
} |
|
|
|
values = ldap_get_values( ld, e, "supportedSASLMechanisms" ); |
|
if ( values == NULL ) { |
|
ld->ld_errno = LDAP_NO_SUCH_ATTRIBUTE; |
|
ldap_msgfree( res ); |
|
return ld->ld_errno; |
|
} |
|
|
|
mechlist = array2str( values ); |
|
if ( mechlist == NULL ) { |
|
ld->ld_errno = LDAP_NO_MEMORY; |
|
ldap_value_free( values ); |
|
ldap_msgfree( res ); |
|
return ld->ld_errno; |
|
} |
|
|
|
ldap_value_free( values ); |
|
ldap_msgfree( res ); |
|
|
|
*pmechlist = mechlist; |
|
|
|
return LDAP_SUCCESS; |
|
} |
|
|
|
int |
|
ldap_pvt_sasl_bind( |
|
LDAP *ld, |
|
LDAP_CONST char *dn, |
|
LDAP_CONST char *mechs, |
|
LDAP_CONST sasl_callback_t *callbacks, |
|
LDAPControl **sctrls, |
|
LDAPControl **cctrls ) |
|
{ |
|
const char *mech; |
|
int saslrc, rc; |
|
sasl_ssf_t *ssf = NULL; |
|
unsigned credlen; |
|
struct berval ccred, *scred; |
|
char *host; |
|
sasl_interact_t *client_interact = NULL; |
|
struct sockaddr_in sin; |
|
socklen_t len; |
|
sasl_security_properties_t secprops; |
|
ber_socket_t sd; |
|
|
|
Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_bind\n", 0, 0, 0 ); |
|
|
|
/* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */ |
|
if (ld->ld_version < LDAP_VERSION3) { |
|
ld->ld_errno = LDAP_NOT_SUPPORTED; |
|
return ld->ld_errno; |
|
} |
|
|
|
ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd ); |
|
|
|
if ( sd == AC_SOCKET_INVALID ) { |
|
/* not connected yet */ |
|
int rc = ldap_open_defconn( ld ); |
|
|
|
if( rc < 0 ) return ld->ld_errno; |
|
ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd ); |
|
} |
|
|
|
/* XXX this doesn't work with PF_LOCAL hosts */ |
|
host = ldap_host_connected_to( ld->ld_sb ); |
|
|
|
if ( host == NULL ) { |
|
ld->ld_errno = LDAP_UNAVAILABLE; |
|
return ld->ld_errno; |
|
} |
|
|
|
if ( ld->ld_sasl_context != NULL ) { |
|
sasl_dispose( &ld->ld_sasl_context ); |
|
} |
|
|
|
saslrc = sasl_client_new( "ldap", host, callbacks, SASL_SECURITY_LAYER, |
|
&ld->ld_sasl_context ); |
|
|
|
LDAP_FREE( host ); |
|
|
|
if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) { |
|
ld->ld_errno = sasl_err2ldap( saslrc ); |
|
sasl_dispose( &ld->ld_sasl_context ); |
|
return ld->ld_errno; |
|
} |
|
|
|
len = sizeof( sin ); |
|
if ( getpeername( sd, (struct sockaddr *)&sin, &len ) == -1 ) { |
|
Debug( LDAP_DEBUG_ANY, "SASL: can't query remote IP.\n", |
|
0, 0, 0 ); |
|
ld->ld_errno = LDAP_OPERATIONS_ERROR; |
|
return ld->ld_errno; |
|
} |
|
sasl_setprop( ld->ld_sasl_context, SASL_IP_REMOTE, &sin ); |
|
|
|
len = sizeof( sin ); |
|
if ( getsockname( sd, (struct sockaddr *)&sin, &len ) == -1 ) { |
|
Debug( LDAP_DEBUG_ANY, "SASL: can't query local IP.\n", |
|
0, 0, 0 ); |
|
ld->ld_errno = LDAP_OPERATIONS_ERROR; |
|
return ld->ld_errno; |
|
} |
|
sasl_setprop( ld->ld_sasl_context, SASL_IP_LOCAL, &sin ); |
|
|
|
memset( &secprops, 0, sizeof( secprops ) ); |
|
secprops.min_ssf = ld->ld_options.ldo_sasl_minssf; |
|
secprops.max_ssf = ld->ld_options.ldo_sasl_maxssf; |
|
secprops.security_flags = SASL_SECURITY_LAYER; |
|
secprops.maxbufsize = 65536; |
|
sasl_setprop( ld->ld_sasl_context, SASL_SEC_PROPS, &secprops ); |
|
|
|
ccred.bv_val = NULL; |
|
ccred.bv_len = 0; |
|
|
|
saslrc = sasl_client_start( ld->ld_sasl_context, |
|
mechs, |
|
NULL, |
|
&client_interact, |
|
&ccred.bv_val, |
|
&credlen, |
|
&mech ); |
|
|
|
ccred.bv_len = credlen; |
|
|
|
if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) { |
|
ld->ld_errno = sasl_err2ldap( saslrc ); |
|
sasl_dispose( &ld->ld_sasl_context ); |
|
return ld->ld_errno; |
|
} |
|
|
|
scred = NULL; |
|
|
|
do { |
|
unsigned credlen; |
|
sasl_interact_t *client_interact = NULL; |
|
|
|
rc = ldap_sasl_bind_s( ld, dn, mech, &ccred, sctrls, cctrls, &scred ); |
|
if ( rc == LDAP_SUCCESS ) { |
|
break; |
|
} else if ( rc != LDAP_SASL_BIND_IN_PROGRESS ) { |
|
if ( ccred.bv_val != NULL ) { |
|
LDAP_FREE( ccred.bv_val ); |
|
} |
|
sasl_dispose( &ld->ld_sasl_context ); |
|
return ld->ld_errno; |
|
} |
|
|
|
if ( ccred.bv_val != NULL ) { |
|
LDAP_FREE( ccred.bv_val ); |
|
ccred.bv_val = NULL; |
|
} |
|
|
|
saslrc = sasl_client_step( ld->ld_sasl_context, |
|
(scred == NULL) ? NULL : scred->bv_val, |
|
(scred == NULL) ? 0 : scred->bv_len, |
|
&client_interact, |
|
&ccred.bv_val, |
|
&credlen ); |
|
|
|
ccred.bv_len = credlen; |
|
ber_bvfree( scred ); |
|
|
|
if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) { |
|
ld->ld_errno = sasl_err2ldap( saslrc ); |
|
sasl_dispose( &ld->ld_sasl_context ); |
|
return ld->ld_errno; |
|
} |
|
} while ( rc == LDAP_SASL_BIND_IN_PROGRESS ); |
|
|
|
assert ( rc == LDAP_SUCCESS ); |
|
|
|
if ( sasl_getprop( ld->ld_sasl_context, SASL_SSF, (void **)&ssf ) |
|
== SASL_OK && ssf && *ssf ) { |
|
ldap_pvt_sasl_install( ld->ld_sb, ld->ld_sasl_context ); |
|
} |
|
|
|
return rc; |
|
} |
|
|
|
/* based on sample/sample-client.c */ |
|
static int |
|
ldap_pvt_sasl_getsecret(sasl_conn_t *conn, |
|
void *context, int id, sasl_secret_t **psecret) |
|
{ |
|
struct berval *passphrase = (struct berval *)context; |
|
size_t len; |
|
|
|
if ( conn == NULL || psecret == NULL || id != SASL_CB_PASS ) { |
|
return SASL_BADPARAM; |
|
} |
|
|
|
len = (passphrase != NULL) ? (size_t)passphrase->bv_len: 0; |
|
|
|
*psecret = (sasl_secret_t *) LDAP_MALLOC( sizeof( sasl_secret_t ) + len ); |
|
if ( *psecret == NULL ) { |
|
return SASL_NOMEM; |
|
} |
|
|
|
(*psecret)->len = passphrase->bv_len; |
|
|
|
if ( passphrase != NULL ) { |
|
memcpy((*psecret)->data, passphrase->bv_val, len); |
|
} |
|
|
|
return SASL_OK; |
|
} |
|
|
|
static int |
|
ldap_pvt_sasl_getsimple(void *context, int id, const char **result, int *len) |
|
{ |
|
const char *value = (const char *)context; |
|
|
|
if ( result == NULL ) { |
|
return SASL_BADPARAM; |
|
} |
|
|
|
switch ( id ) { |
|
case SASL_CB_USER: |
|
case SASL_CB_AUTHNAME: |
|
*result = value; |
|
if ( len ) |
|
*len = value ? strlen( value ) : 0; |
|
break; |
|
case SASL_CB_LANGUAGE: |
|
*result = NULL; |
|
if ( len ) |
|
*len = 0; |
|
break; |
|
default: |
|
return SASL_BADPARAM; |
|
} |
|
|
|
return SASL_OK; |
|
} |
|
|
|
int |
|
ldap_pvt_sasl_get_option( LDAP *ld, int option, void *arg ) |
|
{ |
|
sasl_ssf_t *ssf; |
|
|
|
if ( ld == NULL ) |
|
return -1; |
|
|
|
switch ( option ) { |
|
case LDAP_OPT_X_SASL_MINSSF: |
|
*(int *)arg = ld->ld_options.ldo_sasl_minssf; |
|
break; |
|
case LDAP_OPT_X_SASL_MAXSSF: |
|
*(int *)arg = ld->ld_options.ldo_sasl_maxssf; |
|
break; |
|
case LDAP_OPT_X_SASL_ACTSSF: |
|
if ( ld->ld_sasl_context == NULL ) { |
|
*(int *)arg = -1; |
|
break; |
|
} |
|
if ( sasl_getprop( ld->ld_sasl_context, SASL_SSF, |
|
(void **) &ssf ) != SASL_OK ) |
|
{ |
|
return -1; |
|
} |
|
*(int *)arg = *ssf; |
|
break; |
|
default: |
|
return -1; |
|
} |
|
return 0; |
|
} |
|
|
|
int |
|
ldap_pvt_sasl_set_option( LDAP *ld, int option, void *arg ) |
|
{ |
|
if ( ld == NULL ) |
|
return -1; |
|
|
|
switch ( option ) { |
|
case LDAP_OPT_X_SASL_MINSSF: |
|
ld->ld_options.ldo_sasl_minssf = *(int *)arg; |
|
break; |
|
case LDAP_OPT_X_SASL_MAXSSF: |
|
ld->ld_options.ldo_sasl_maxssf = *(int *)arg; |
|
break; |
|
case LDAP_OPT_X_SASL_ACTSSF: |
|
/* This option is read-only */ |
|
default: |
|
return -1; |
|
} |
|
return 0; |
|
} |
|
|
|
/* |
|
* ldap_negotiated_sasl_bind_s - bind to the ldap server (and X.500) |
|
* using SASL authentication. |
|
* |
|
* This routine attempts to authenticate the user referred by the |
|
* authentication id using the provided password. An optional |
|
* authorization identity may be provided. An DN is generally not |
|
* provided [see AuthMethod]. |
|
* |
|
* If the mechanism negotiated does not require a password, the |
|
* passwd field is ignored. [A callback mechanism should really |
|
* be used]. |
|
* |
|
* LDAP_SUCCESS is returned upon success, the ldap error code |
|
* otherwise. |
|
* |
|
* Examples: |
|
* ldap_negotiated_sasl_bind_s( ld, NULL, |
|
* NULL, NULL, NULL, |
|
* NULL, NULL, NULL, NULL ); |
|
* |
|
* ldap_negotiated_sasl_bind_s( ld, NULL, |
|
* "user@OPENLDAP.ORG", NULL, NULL, |
|
* "GSSAPI", NULL, NULL, NULL ); |
|
* |
|
* ldap_negotiated_sasl_bind_s( ld, NULL, |
|
* "manager", "dn:cn=user,dc=openldap,dc=org", NULL, |
|
* "DIGEST-MD5", NULL, NULL, NULL ); |
|
* |
|
* ldap_negotiated_sasl_bind_s( ld, NULL, |
|
* "root@OPENLDAP.ORG", "u:user@OPENLDAP.ORG", NULL, |
|
* "GSSAPI", NULL, NULL, NULL ); |
|
* |
|
* ldap_negotiated_sasl_bind_s( ld, NULL, |
|
* "manager", "dn:cn=user,dc=openldap,dc=org", NULL, |
|
* "DIGEST-MD5", NULL, NULL, NULL ); |
|
*/ |
|
int |
|
ldap_negotiated_sasl_bind_s( |
|
LDAP *ld, |
|
LDAP_CONST char *dn, /* usually NULL */ |
|
LDAP_CONST char *authenticationId, |
|
LDAP_CONST char *authorizationId, /* commonly NULL */ |
|
LDAP_CONST char *saslMechanism, |
|
struct berval *passPhrase, |
|
LDAPControl **serverControls, |
|
LDAPControl **clientControls) |
|
{ |
|
int n; |
|
sasl_callback_t callbacks[4]; |
|
int rc; |
|
|
|
Debug( LDAP_DEBUG_TRACE, "ldap_negotiated_sasl_bind_s\n", 0, 0, 0 ); |
|
|
|
if( saslMechanism == NULL || *saslMechanism == '\0' ) { |
|
char *mechs; |
|
rc = ldap_pvt_sasl_getmechs( ld, &mechs ); |
|
|
|
if( rc != LDAP_SUCCESS ) { |
|
return rc; |
|
} |
|
|
|
saslMechanism = mechs; |
|
} |
|
|
|
/* SASL Authentication Identity */ |
|
callbacks[n=0].id = SASL_CB_AUTHNAME; |
|
callbacks[n].proc = ldap_pvt_sasl_getsimple; |
|
callbacks[n].context = (void *)authenticationId; |
|
|
|
/* SASL Authorization Identity (userid) */ |
|
if( authorizationId != NULL ) { |
|
callbacks[++n].id = SASL_CB_USER; |
|
callbacks[n].proc = ldap_pvt_sasl_getsimple; |
|
callbacks[n].context = (void *)authorizationId; |
|
} |
|
|
|
callbacks[++n].id = SASL_CB_PASS; |
|
callbacks[n].proc = ldap_pvt_sasl_getsecret; |
|
callbacks[n].context = (void *)passPhrase; |
|
|
|
callbacks[++n].id = SASL_CB_LIST_END; |
|
callbacks[n].proc = NULL; |
|
callbacks[n].context = NULL; |
|
|
|
assert( n * sizeof(sasl_callback_t) < sizeof(callbacks) ); |
|
|
|
rc = ldap_pvt_sasl_bind(ld, dn, saslMechanism, callbacks, |
|
serverControls, clientControls); |
|
|
|
return rc; |
|
} |
|
#endif /* HAVE_CYRUS_SASL */ |