diff options
Diffstat (limited to '')
| -rw-r--r-- | contrib/slapd-modules/smbk5pwd/smbk5pwd.c | 1177 |
1 files changed, 1177 insertions, 0 deletions
diff --git a/contrib/slapd-modules/smbk5pwd/smbk5pwd.c b/contrib/slapd-modules/smbk5pwd/smbk5pwd.c new file mode 100644 index 0000000..0dda119 --- /dev/null +++ b/contrib/slapd-modules/smbk5pwd/smbk5pwd.c @@ -0,0 +1,1177 @@ +/* smbk5pwd.c - Overlay for managing Samba and Heimdal passwords */ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 2004-2018 The OpenLDAP Foundation. + * Portions Copyright 2004-2005 by Howard Chu, Symas Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ +/* ACKNOWLEDGEMENTS: + * Support for table-driven configuration added by Pierangelo Masarati. + * Support for sambaPwdMustChange and sambaPwdCanChange added by Marco D'Ettorre. + * Support for shadowLastChange added by SATOH Fumiyasu @ OSS Technology, Inc. + */ + +#include <portable.h> + +#ifndef SLAPD_OVER_SMBK5PWD +#define SLAPD_OVER_SMBK5PWD SLAPD_MOD_DYNAMIC +#endif + +#ifdef SLAPD_OVER_SMBK5PWD + +#include <slap.h> +#include <ac/errno.h> +#include <ac/string.h> + +#include "config.h" + +#ifdef DO_KRB5 +#include <lber.h> +#include <lber_pvt.h> +#include <lutil.h> + +/* make ASN1_MALLOC_ENCODE use our allocator */ +#define malloc ch_malloc + +#include <krb5.h> +#include <kadm5/admin.h> +#include <hdb.h> + +#ifndef HDB_INTERFACE_VERSION +#define HDB_MASTER_KEY_SET master_key_set +#else +#define HDB_MASTER_KEY_SET hdb_master_key_set +#endif + +static krb5_context context; +static void *kadm_context; +static kadm5_config_params conf; +static HDB *db; + +static AttributeDescription *ad_krb5Key; +static AttributeDescription *ad_krb5KeyVersionNumber; +static AttributeDescription *ad_krb5PrincipalName; +static AttributeDescription *ad_krb5ValidEnd; +static ObjectClass *oc_krb5KDCEntry; +#endif + +#ifdef DO_SAMBA +#ifdef HAVE_GNUTLS +#include <nettle/des.h> +#include <nettle/md4.h> +typedef unsigned char DES_cblock[8]; +#elif HAVE_OPENSSL +#include <openssl/des.h> +#include <openssl/md4.h> +#else +#error Unsupported crypto backend. +#endif +#include "ldap_utf8.h" + +static AttributeDescription *ad_sambaLMPassword; +static AttributeDescription *ad_sambaNTPassword; +static AttributeDescription *ad_sambaPwdLastSet; +static AttributeDescription *ad_sambaPwdMustChange; +static AttributeDescription *ad_sambaPwdCanChange; +static ObjectClass *oc_sambaSamAccount; +#endif + +#ifdef DO_SHADOW +static AttributeDescription *ad_shadowLastChange; +static ObjectClass *oc_shadowAccount; +#endif + +/* Per-instance configuration information */ +typedef struct smbk5pwd_t { + unsigned mode; +#define SMBK5PWD_F_KRB5 (0x1U) +#define SMBK5PWD_F_SAMBA (0x2U) +#define SMBK5PWD_F_SHADOW (0x4U) + +#define SMBK5PWD_DO_KRB5(pi) ((pi)->mode & SMBK5PWD_F_KRB5) +#define SMBK5PWD_DO_SAMBA(pi) ((pi)->mode & SMBK5PWD_F_SAMBA) +#define SMBK5PWD_DO_SHADOW(pi) ((pi)->mode & SMBK5PWD_F_SHADOW) + +#ifdef DO_KRB5 + /* nothing yet */ +#endif + +#ifdef DO_SAMBA + /* How many seconds before forcing a password change? */ + time_t smb_must_change; + /* How many seconds after allowing a password change? */ + time_t smb_can_change; +#endif + +#ifdef DO_SHADOW + /* nothing yet */ +#endif +} smbk5pwd_t; + +static const unsigned SMBK5PWD_F_ALL = + 0 +#ifdef DO_KRB5 + | SMBK5PWD_F_KRB5 +#endif +#ifdef DO_SAMBA + | SMBK5PWD_F_SAMBA +#endif +#ifdef DO_SHADOW + | SMBK5PWD_F_SHADOW +#endif +; + +static int smbk5pwd_modules_init( smbk5pwd_t *pi ); + +#ifdef DO_SAMBA +static const char hex[] = "0123456789abcdef"; + +/* From liblutil/passwd.c... */ +static void lmPasswd_to_key( + const char *lmPasswd, + DES_cblock *key) +{ + const unsigned char *lpw = (const unsigned char *)lmPasswd; + unsigned char *k = (unsigned char *)key; + + /* make room for parity bits */ + k[0] = lpw[0]; + k[1] = ((lpw[0]&0x01)<<7) | (lpw[1]>>1); + k[2] = ((lpw[1]&0x03)<<6) | (lpw[2]>>2); + k[3] = ((lpw[2]&0x07)<<5) | (lpw[3]>>3); + k[4] = ((lpw[3]&0x0F)<<4) | (lpw[4]>>4); + k[5] = ((lpw[4]&0x1F)<<3) | (lpw[5]>>5); + k[6] = ((lpw[5]&0x3F)<<2) | (lpw[6]>>6); + k[7] = ((lpw[6]&0x7F)<<1); + +#ifdef HAVE_OPENSSL + DES_set_odd_parity( key ); +#endif +} + +#define MAX_PWLEN 256 +#define HASHLEN 16 + +static void hexify( + const char in[HASHLEN], + struct berval *out +) +{ + int i; + char *a; + unsigned char *b; + + out->bv_val = ch_malloc(HASHLEN*2 + 1); + out->bv_len = HASHLEN*2; + + a = out->bv_val; + b = (unsigned char *)in; + for (i=0; i<HASHLEN; i++) { + *a++ = hex[*b >> 4]; + *a++ = hex[*b++ & 0x0f]; + } + *a++ = '\0'; +} + +static void lmhash( + struct berval *passwd, + struct berval *hash +) +{ + char UcasePassword[15]; + DES_cblock key; + DES_cblock StdText = "KGS!@#$%"; + DES_cblock hbuf[2]; +#ifdef HAVE_OPENSSL + DES_key_schedule schedule; +#elif defined(HAVE_GNUTLS) + struct des_ctx ctx; +#endif + + strncpy( UcasePassword, passwd->bv_val, 14 ); + UcasePassword[14] = '\0'; + ldap_pvt_str2upper( UcasePassword ); + + lmPasswd_to_key( UcasePassword, &key ); +#ifdef HAVE_GNUTLS + des_set_key( &ctx, key ); + des_encrypt( &ctx, sizeof(key), hbuf[0], StdText ); + + lmPasswd_to_key( &UcasePassword[7], &key ); + des_set_key( &ctx, key ); + des_encrypt( &ctx, sizeof(key), hbuf[1], StdText ); +#elif defined(HAVE_OPENSSL) + DES_set_key_unchecked( &key, &schedule ); + DES_ecb_encrypt( &StdText, &hbuf[0], &schedule , DES_ENCRYPT ); + + lmPasswd_to_key( &UcasePassword[7], &key ); + DES_set_key_unchecked( &key, &schedule ); + DES_ecb_encrypt( &StdText, &hbuf[1], &schedule , DES_ENCRYPT ); +#endif + + hexify( (char *)hbuf, hash ); +} + +static void nthash( + struct berval *passwd, + struct berval *hash +) +{ + /* Windows currently only allows 14 character passwords, but + * may support up to 256 in the future. We assume this means + * 256 UCS2 characters, not 256 bytes... + */ + char hbuf[HASHLEN]; +#ifdef HAVE_OPENSSL + MD4_CTX ctx; +#elif defined(HAVE_GNUTLS) + struct md4_ctx ctx; +#endif + + if (passwd->bv_len > MAX_PWLEN*2) + passwd->bv_len = MAX_PWLEN*2; + +#ifdef HAVE_OPENSSL + MD4_Init( &ctx ); + MD4_Update( &ctx, passwd->bv_val, passwd->bv_len ); + MD4_Final( (unsigned char *)hbuf, &ctx ); +#elif defined(HAVE_GNUTLS) + md4_init( &ctx ); + md4_update( &ctx, passwd->bv_len, (unsigned char *)passwd->bv_val ); + md4_digest( &ctx, sizeof(hbuf), (unsigned char *)hbuf ); +#endif + + hexify( hbuf, hash ); +} +#endif /* DO_SAMBA */ + +#ifdef DO_KRB5 + +static int smbk5pwd_op_cleanup( + Operation *op, + SlapReply *rs ) +{ + slap_callback *cb; + + /* clear out the current key */ + ldap_pvt_thread_pool_setkey( op->o_threadctx, smbk5pwd_op_cleanup, + NULL, 0, NULL, NULL ); + + /* free the callback */ + cb = op->o_callback; + op->o_callback = cb->sc_next; + op->o_tmpfree( cb, op->o_tmpmemctx ); + return 0; +} + +static int smbk5pwd_op_bind( + Operation *op, + SlapReply *rs ) +{ + /* If this is a simple Bind, stash the Op pointer so our chk + * function can find it. Set a cleanup callback to clear it + * out when the Bind completes. + */ + if ( op->oq_bind.rb_method == LDAP_AUTH_SIMPLE ) { + slap_callback *cb; + ldap_pvt_thread_pool_setkey( op->o_threadctx, + smbk5pwd_op_cleanup, op, 0, NULL, NULL ); + cb = op->o_tmpcalloc( 1, sizeof(slap_callback), op->o_tmpmemctx ); + cb->sc_cleanup = smbk5pwd_op_cleanup; + cb->sc_next = op->o_callback; + op->o_callback = cb; + } + return SLAP_CB_CONTINUE; +} + +static LUTIL_PASSWD_CHK_FUNC k5key_chk; +static LUTIL_PASSWD_HASH_FUNC k5key_hash; +static const struct berval k5key_scheme = BER_BVC("{K5KEY}"); + +/* This password scheme stores no data in the userPassword attribute + * other than the scheme name. It assumes the invoking entry is a + * krb5KDCentry and compares the passed-in credentials against the + * krb5Key attribute. The krb5Key may be multi-valued, but they are + * simply multiple keytypes generated from the same input string, so + * only the first value needs to be compared here. + * + * Since the lutil_passwd API doesn't pass the Entry object in, we + * have to fetch it ourselves in order to get access to the other + * attributes. We accomplish this with the help of the overlay's Bind + * function, which stores the current Operation pointer in thread-specific + * storage so we can retrieve it here. The Operation provides all + * the necessary context for us to get Entry from the database. + */ +static int k5key_chk( + const struct berval *sc, + const struct berval *passwd, + const struct berval *cred, + const char **text ) +{ + void *ctx, *op_tmp; + Operation *op; + int rc; + Entry *e; + Attribute *a; + krb5_error_code ret; + krb5_keyblock key; + krb5_salt salt; + hdb_entry ent; + + /* Find our thread context, find our Operation */ + ctx = ldap_pvt_thread_pool_context(); + + if ( ldap_pvt_thread_pool_getkey( ctx, smbk5pwd_op_cleanup, &op_tmp, NULL ) + || !op_tmp ) + return LUTIL_PASSWD_ERR; + op = op_tmp; + + rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e ); + if ( rc != LDAP_SUCCESS ) return LUTIL_PASSWD_ERR; + + rc = LUTIL_PASSWD_ERR; + do { + size_t l; + Key ekey = {0}; + + a = attr_find( e->e_attrs, ad_krb5PrincipalName ); + if (!a ) break; + + memset( &ent, 0, sizeof(ent) ); + ret = krb5_parse_name(context, a->a_vals[0].bv_val, &ent.principal); + if ( ret ) break; + + a = attr_find( e->e_attrs, ad_krb5ValidEnd ); + if (a) { + struct lutil_tm tm; + struct lutil_timet tt; + if ( lutil_parsetime( a->a_vals[0].bv_val, &tm ) == 0 && + lutil_tm2time( &tm, &tt ) == 0 && tt.tt_usec < op->o_time ) { + /* Account is expired */ + rc = LUTIL_PASSWD_ERR; + break; + } + } + + krb5_get_pw_salt( context, ent.principal, &salt ); + krb5_free_principal( context, ent.principal ); + + a = attr_find( e->e_attrs, ad_krb5Key ); + if ( !a ) break; + + ent.keys.len = 1; + ent.keys.val = &ekey; + decode_Key((unsigned char *) a->a_vals[0].bv_val, + (size_t) a->a_vals[0].bv_len, &ent.keys.val[0], &l); + if ( db->HDB_MASTER_KEY_SET ) + hdb_unseal_keys( context, db, &ent ); + + krb5_string_to_key_salt( context, ekey.key.keytype, cred->bv_val, + salt, &key ); + + krb5_free_salt( context, salt ); + + if ( memcmp( ekey.key.keyvalue.data, key.keyvalue.data, + key.keyvalue.length ) == 0 ) rc = LUTIL_PASSWD_OK; + + krb5_free_keyblock_contents( context, &key ); + krb5_free_keyblock_contents( context, &ekey.key ); + + } while(0); + be_entry_release_r( op, e ); + return rc; +} + +static int k5key_hash( + const struct berval *scheme, + const struct berval *passwd, + struct berval *hash, + const char **text ) +{ + ber_dupbv( hash, (struct berval *)&k5key_scheme ); + return LUTIL_PASSWD_OK; +} +#endif /* DO_KRB5 */ + +static int smbk5pwd_exop_passwd( + Operation *op, + SlapReply *rs ) +{ + int rc; + req_pwdexop_s *qpw = &op->oq_pwdexop; + Entry *e; + Modifications *ml; + slap_overinst *on = (slap_overinst *)op->o_bd->bd_info; + smbk5pwd_t *pi = on->on_bi.bi_private; + char term; + + /* Not the operation we expected, pass it on... */ + if ( ber_bvcmp( &slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid ) ) { + return SLAP_CB_CONTINUE; + } + + op->o_bd->bd_info = (BackendInfo *)on->on_info; + rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e ); + if ( rc != LDAP_SUCCESS ) return rc; + + term = qpw->rs_new.bv_val[qpw->rs_new.bv_len]; + qpw->rs_new.bv_val[qpw->rs_new.bv_len] = '\0'; + +#ifdef DO_KRB5 + /* Kerberos stuff */ + do { + krb5_error_code ret; + hdb_entry ent; + struct berval *keys; + size_t nkeys; + int kvno, i; + Attribute *a; + + if ( !SMBK5PWD_DO_KRB5( pi ) ) break; + + if ( !is_entry_objectclass(e, oc_krb5KDCEntry, 0 ) ) break; + + a = attr_find( e->e_attrs, ad_krb5PrincipalName ); + if ( !a ) break; + + memset( &ent, 0, sizeof(ent) ); + ret = krb5_parse_name(context, a->a_vals[0].bv_val, &ent.principal); + if ( ret ) break; + + a = attr_find( e->e_attrs, ad_krb5KeyVersionNumber ); + kvno = 0; + if ( a ) { + if ( lutil_atoi( &kvno, a->a_vals[0].bv_val ) != 0 ) { + Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: " + "dn=\"%s\" unable to parse krb5KeyVersionNumber=\"%s\"\n", + op->o_log_prefix, e->e_name.bv_val, a->a_vals[0].bv_val ); + } + + } else { + /* shouldn't happen, this is a required attr */ + Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: " + "dn=\"%s\" missing krb5KeyVersionNumber\n", + op->o_log_prefix, e->e_name.bv_val, 0 ); + } + + ret = hdb_generate_key_set_password(context, ent.principal, + qpw->rs_new.bv_val, &ent.keys.val, &nkeys); + ent.keys.len = nkeys; + hdb_seal_keys(context, db, &ent); + krb5_free_principal( context, ent.principal ); + + keys = ch_malloc( (ent.keys.len + 1) * sizeof(struct berval)); + + for (i = 0; i < ent.keys.len; i++) { + unsigned char *buf; + size_t len; + + ASN1_MALLOC_ENCODE(Key, buf, len, &ent.keys.val[i], &len, ret); + if (ret != 0) + break; + + keys[i].bv_val = (char *)buf; + keys[i].bv_len = len; + } + BER_BVZERO( &keys[i] ); + + hdb_free_keys(context, ent.keys.len, ent.keys.val); + + if ( i != ent.keys.len ) { + ber_bvarray_free( keys ); + break; + } + + ml = ch_malloc(sizeof(Modifications)); + if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next; + ml->sml_next = qpw->rs_mods; + qpw->rs_mods = ml; + + ml->sml_desc = ad_krb5Key; + ml->sml_op = LDAP_MOD_REPLACE; +#ifdef SLAP_MOD_INTERNAL + ml->sml_flags = SLAP_MOD_INTERNAL; +#endif + ml->sml_numvals = i; + ml->sml_values = keys; + ml->sml_nvalues = NULL; + + ml = ch_malloc(sizeof(Modifications)); + ml->sml_next = qpw->rs_mods; + qpw->rs_mods = ml; + + ml->sml_desc = ad_krb5KeyVersionNumber; + ml->sml_op = LDAP_MOD_REPLACE; +#ifdef SLAP_MOD_INTERNAL + ml->sml_flags = SLAP_MOD_INTERNAL; +#endif + ml->sml_numvals = 1; + ml->sml_values = ch_malloc( 2 * sizeof(struct berval)); + ml->sml_values[0].bv_val = ch_malloc( 64 ); + ml->sml_values[0].bv_len = sprintf(ml->sml_values[0].bv_val, + "%d", kvno+1 ); + BER_BVZERO( &ml->sml_values[1] ); + ml->sml_nvalues = NULL; + } while ( 0 ); +#endif /* DO_KRB5 */ + +#ifdef DO_SAMBA + /* Samba stuff */ + if ( SMBK5PWD_DO_SAMBA( pi ) && is_entry_objectclass(e, oc_sambaSamAccount, 0 ) ) { + struct berval *keys; + ber_len_t j,l; + wchar_t *wcs, wc; + char *c, *d; + struct berval pwd; + + /* Expand incoming UTF8 string to UCS4 */ + l = ldap_utf8_chars(qpw->rs_new.bv_val); + wcs = ch_malloc((l+1) * sizeof(wchar_t)); + + ldap_x_utf8s_to_wcs( wcs, qpw->rs_new.bv_val, l ); + + /* Truncate UCS4 to UCS2 */ + c = (char *)wcs; + for (j=0; j<l; j++) { + wc = wcs[j]; + *c++ = wc & 0xff; + *c++ = (wc >> 8) & 0xff; + } + *c++ = 0; + pwd.bv_val = (char *)wcs; + pwd.bv_len = l * 2; + + ml = ch_malloc(sizeof(Modifications)); + if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next; + ml->sml_next = qpw->rs_mods; + qpw->rs_mods = ml; + + keys = ch_malloc( 2 * sizeof(struct berval) ); + BER_BVZERO( &keys[1] ); + nthash( &pwd, keys ); + + ml->sml_desc = ad_sambaNTPassword; + ml->sml_op = LDAP_MOD_REPLACE; +#ifdef SLAP_MOD_INTERNAL + ml->sml_flags = SLAP_MOD_INTERNAL; +#endif + ml->sml_numvals = 1; + ml->sml_values = keys; + ml->sml_nvalues = NULL; + + /* Truncate UCS2 to 8-bit ASCII */ + c = pwd.bv_val+1; + d = pwd.bv_val+2; + for (j=1; j<l; j++) { + *c++ = *d++; + d++; + } + pwd.bv_len /= 2; + pwd.bv_val[pwd.bv_len] = '\0'; + + ml = ch_malloc(sizeof(Modifications)); + ml->sml_next = qpw->rs_mods; + qpw->rs_mods = ml; + + keys = ch_malloc( 2 * sizeof(struct berval) ); + BER_BVZERO( &keys[1] ); + lmhash( &pwd, keys ); + + ml->sml_desc = ad_sambaLMPassword; + ml->sml_op = LDAP_MOD_REPLACE; +#ifdef SLAP_MOD_INTERNAL + ml->sml_flags = SLAP_MOD_INTERNAL; +#endif + ml->sml_numvals = 1; + ml->sml_values = keys; + ml->sml_nvalues = NULL; + + ch_free(wcs); + + ml = ch_malloc(sizeof(Modifications)); + ml->sml_next = qpw->rs_mods; + qpw->rs_mods = ml; + + keys = ch_malloc( 2 * sizeof(struct berval) ); + keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) ); + keys[0].bv_len = snprintf(keys[0].bv_val, + LDAP_PVT_INTTYPE_CHARS(long), + "%ld", slap_get_time()); + BER_BVZERO( &keys[1] ); + + ml->sml_desc = ad_sambaPwdLastSet; + ml->sml_op = LDAP_MOD_REPLACE; +#ifdef SLAP_MOD_INTERNAL + ml->sml_flags = SLAP_MOD_INTERNAL; +#endif + ml->sml_numvals = 1; + ml->sml_values = keys; + ml->sml_nvalues = NULL; + + if (pi->smb_must_change) + { + ml = ch_malloc(sizeof(Modifications)); + ml->sml_next = qpw->rs_mods; + qpw->rs_mods = ml; + + keys = ch_malloc( 2 * sizeof(struct berval) ); + keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) ); + keys[0].bv_len = snprintf(keys[0].bv_val, + LDAP_PVT_INTTYPE_CHARS(long), + "%ld", slap_get_time() + pi->smb_must_change); + BER_BVZERO( &keys[1] ); + + ml->sml_desc = ad_sambaPwdMustChange; + ml->sml_op = LDAP_MOD_REPLACE; +#ifdef SLAP_MOD_INTERNAL + ml->sml_flags = SLAP_MOD_INTERNAL; +#endif + ml->sml_numvals = 1; + ml->sml_values = keys; + ml->sml_nvalues = NULL; + } + + if (pi->smb_can_change) + { + ml = ch_malloc(sizeof(Modifications)); + ml->sml_next = qpw->rs_mods; + qpw->rs_mods = ml; + + keys = ch_malloc( 2 * sizeof(struct berval) ); + keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) ); + keys[0].bv_len = snprintf(keys[0].bv_val, + LDAP_PVT_INTTYPE_CHARS(long), + "%ld", slap_get_time() + pi->smb_can_change); + BER_BVZERO( &keys[1] ); + + ml->sml_desc = ad_sambaPwdCanChange; + ml->sml_op = LDAP_MOD_REPLACE; +#ifdef SLAP_MOD_INTERNAL + ml->sml_flags = SLAP_MOD_INTERNAL; +#endif + ml->sml_numvals = 1; + ml->sml_values = keys; + ml->sml_nvalues = NULL; + } + } +#endif /* DO_SAMBA */ + +#ifdef DO_SHADOW + /* shadow stuff */ + if ( SMBK5PWD_DO_SHADOW( pi ) && is_entry_objectclass(e, oc_shadowAccount, 0 ) ) { + struct berval *keys; + + ml = ch_malloc(sizeof(Modifications)); + if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next; + ml->sml_next = qpw->rs_mods; + qpw->rs_mods = ml; + + keys = ch_malloc( sizeof(struct berval) * 2); + BER_BVZERO( &keys[1] ); + keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) ); + keys[0].bv_len = snprintf(keys[0].bv_val, + LDAP_PVT_INTTYPE_CHARS(long), + "%ld", (long)(slap_get_time() / (60 * 60 * 24))); + + ml->sml_desc = ad_shadowLastChange; + ml->sml_op = LDAP_MOD_REPLACE; +#ifdef SLAP_MOD_INTERNAL + ml->sml_flags = SLAP_MOD_INTERNAL; +#endif + ml->sml_numvals = 1; + ml->sml_values = keys; + ml->sml_nvalues = NULL; + } +#endif /* DO_SHADOW */ + + be_entry_release_r( op, e ); + qpw->rs_new.bv_val[qpw->rs_new.bv_len] = term; + + return SLAP_CB_CONTINUE; +} + +static slap_overinst smbk5pwd; + +/* back-config stuff */ +enum { + PC_SMB_MUST_CHANGE = 1, + PC_SMB_CAN_CHANGE, + PC_SMB_ENABLE +}; + +static ConfigDriver smbk5pwd_cf_func; + +/* + * NOTE: uses OID arcs OLcfgCtAt:1 and OLcfgCtOc:1 + */ + +static ConfigTable smbk5pwd_cfats[] = { + { "smbk5pwd-enable", "arg", + 2, 0, 0, ARG_MAGIC|PC_SMB_ENABLE, smbk5pwd_cf_func, + "( OLcfgCtAt:1.1 NAME 'olcSmbK5PwdEnable' " + "DESC 'Modules to be enabled' " + "SYNTAX OMsDirectoryString )", NULL, NULL }, + { "smbk5pwd-must-change", "time", + 2, 2, 0, ARG_MAGIC|ARG_INT|PC_SMB_MUST_CHANGE, smbk5pwd_cf_func, + "( OLcfgCtAt:1.2 NAME 'olcSmbK5PwdMustChange' " + "DESC 'Credentials validity interval' " + "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL }, + { "smbk5pwd-can-change", "time", + 2, 2, 0, ARG_MAGIC|ARG_INT|PC_SMB_CAN_CHANGE, smbk5pwd_cf_func, + "( OLcfgCtAt:1.3 NAME 'olcSmbK5PwdCanChange' " + "DESC 'Credentials minimum validity interval' " + "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL }, + + { NULL, NULL, 0, 0, 0, ARG_IGNORED } +}; + +static ConfigOCs smbk5pwd_cfocs[] = { + { "( OLcfgCtOc:1.1 " + "NAME 'olcSmbK5PwdConfig' " + "DESC 'smbk5pwd overlay configuration' " + "SUP olcOverlayConfig " + "MAY ( " + "olcSmbK5PwdEnable " + "$ olcSmbK5PwdMustChange " + "$ olcSmbK5PwdCanChange " + ") )", Cft_Overlay, smbk5pwd_cfats }, + + { NULL, 0, NULL } +}; + +/* + * add here other functionalities; handle their initialization + * as appropriate in smbk5pwd_modules_init(). + */ +static slap_verbmasks smbk5pwd_modules[] = { + { BER_BVC( "krb5" ), SMBK5PWD_F_KRB5 }, + { BER_BVC( "samba" ), SMBK5PWD_F_SAMBA }, + { BER_BVC( "shadow" ), SMBK5PWD_F_SHADOW }, + { BER_BVNULL, -1 } +}; + +static int +smbk5pwd_cf_func( ConfigArgs *c ) +{ + slap_overinst *on = (slap_overinst *)c->bi; + + int rc = 0; + smbk5pwd_t *pi = on->on_bi.bi_private; + + if ( c->op == SLAP_CONFIG_EMIT ) { + switch( c->type ) { + case PC_SMB_MUST_CHANGE: +#ifdef DO_SAMBA + c->value_int = pi->smb_must_change; +#else /* ! DO_SAMBA */ + c->value_int = 0; +#endif /* ! DO_SAMBA */ + break; + + case PC_SMB_CAN_CHANGE: +#ifdef DO_SAMBA + c->value_int = pi->smb_can_change; +#else /* ! DO_SAMBA */ + c->value_int = 0; +#endif /* ! DO_SAMBA */ + break; + + case PC_SMB_ENABLE: + c->rvalue_vals = NULL; + if ( pi->mode ) { + mask_to_verbs( smbk5pwd_modules, pi->mode, &c->rvalue_vals ); + if ( c->rvalue_vals == NULL ) { + rc = 1; + } + } + break; + + default: + assert( 0 ); + rc = 1; + } + return rc; + + } else if ( c->op == LDAP_MOD_DELETE ) { + switch( c->type ) { + case PC_SMB_MUST_CHANGE: + break; + + case PC_SMB_CAN_CHANGE: + break; + + case PC_SMB_ENABLE: + if ( !c->line ) { + pi->mode = 0; + + } else { + int i; + + i = verb_to_mask( c->line, smbk5pwd_modules ); + pi->mode &= ~smbk5pwd_modules[i].mask; + } + break; + + default: + assert( 0 ); + rc = 1; + } + return rc; + } + + switch( c->type ) { + case PC_SMB_MUST_CHANGE: +#ifdef DO_SAMBA + if ( c->value_int < 0 ) { + Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: " + "<%s> invalid negative value \"%d\".", + c->log, c->argv[ 0 ], 0 ); + return 1; + } + pi->smb_must_change = c->value_int; +#else /* ! DO_SAMBA */ + Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: " + "<%s> only meaningful " + "when compiled with -DDO_SAMBA.\n", + c->log, c->argv[ 0 ], 0 ); + return 1; +#endif /* ! DO_SAMBA */ + break; + + case PC_SMB_CAN_CHANGE: +#ifdef DO_SAMBA + if ( c->value_int < 0 ) { + Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: " + "<%s> invalid negative value \"%d\".", + c->log, c->argv[ 0 ], 0 ); + return 1; + } + pi->smb_can_change = c->value_int; +#else /* ! DO_SAMBA */ + Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: " + "<%s> only meaningful " + "when compiled with -DDO_SAMBA.\n", + c->log, c->argv[ 0 ], 0 ); + return 1; +#endif /* ! DO_SAMBA */ + break; + + case PC_SMB_ENABLE: { + slap_mask_t mode = pi->mode, m = 0; + + rc = verbs_to_mask( c->argc, c->argv, smbk5pwd_modules, &m ); + if ( rc > 0 ) { + Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: " + "<%s> unknown module \"%s\".\n", + c->log, c->argv[ 0 ], c->argv[ rc ] ); + return 1; + } + + /* we can hijack the smbk5pwd_t structure because + * from within the configuration, this is the only + * active thread. */ + pi->mode |= m; + +#ifndef DO_KRB5 + if ( SMBK5PWD_DO_KRB5( pi ) ) { + Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: " + "<%s> module \"%s\" only allowed when compiled with -DDO_KRB5.\n", + c->log, c->argv[ 0 ], c->argv[ rc ] ); + pi->mode = mode; + return 1; + } +#endif /* ! DO_KRB5 */ + +#ifndef DO_SAMBA + if ( SMBK5PWD_DO_SAMBA( pi ) ) { + Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: " + "<%s> module \"%s\" only allowed when compiled with -DDO_SAMBA.\n", + c->log, c->argv[ 0 ], c->argv[ rc ] ); + pi->mode = mode; + return 1; + } +#endif /* ! DO_SAMBA */ + +#ifndef DO_SHADOW + if ( SMBK5PWD_DO_SHADOW( pi ) ) { + Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: " + "<%s> module \"%s\" only allowed when compiled with -DDO_SHADOW.\n", + c->log, c->argv[ 0 ], c->argv[ rc ] ); + pi->mode = mode; + return 1; + } +#endif /* ! DO_SHADOW */ + + /* Re-initialize the module, because + * the configuration might have changed */ + rc = smbk5pwd_modules_init( pi ); + if ( rc ) { + pi->mode = mode; + return 1; + } + + } break; + + default: + assert( 0 ); + return 1; + } + return rc; +} + +static int +smbk5pwd_modules_init( smbk5pwd_t *pi ) +{ + static struct { + const char *name; + AttributeDescription **adp; + } +#ifdef DO_KRB5 + krb5_ad[] = { + { "krb5Key", &ad_krb5Key }, + { "krb5KeyVersionNumber", &ad_krb5KeyVersionNumber }, + { "krb5PrincipalName", &ad_krb5PrincipalName }, + { "krb5ValidEnd", &ad_krb5ValidEnd }, + { NULL } + }, +#endif /* DO_KRB5 */ +#ifdef DO_SAMBA + samba_ad[] = { + { "sambaLMPassword", &ad_sambaLMPassword }, + { "sambaNTPassword", &ad_sambaNTPassword }, + { "sambaPwdLastSet", &ad_sambaPwdLastSet }, + { "sambaPwdMustChange", &ad_sambaPwdMustChange }, + { "sambaPwdCanChange", &ad_sambaPwdCanChange }, + { NULL } + }, +#endif /* DO_SAMBA */ +#ifdef DO_SHADOW + shadow_ad[] = { + { "shadowLastChange", &ad_shadowLastChange }, + { NULL } + }, +#endif /* DO_SHADOW */ + dummy_ad; + + /* this is to silence the unused var warning */ + (void) dummy_ad; + +#ifdef DO_KRB5 + if ( SMBK5PWD_DO_KRB5( pi ) && oc_krb5KDCEntry == NULL ) { + krb5_error_code ret; + extern HDB *_kadm5_s_get_db(void *); + + int i, rc; + + /* Make sure all of our necessary schema items are loaded */ + oc_krb5KDCEntry = oc_find( "krb5KDCEntry" ); + if ( !oc_krb5KDCEntry ) { + Debug( LDAP_DEBUG_ANY, "smbk5pwd: " + "unable to find \"krb5KDCEntry\" objectClass.\n", + 0, 0, 0 ); + return -1; + } + + for ( i = 0; krb5_ad[ i ].name != NULL; i++ ) { + const char *text; + + *(krb5_ad[ i ].adp) = NULL; + + rc = slap_str2ad( krb5_ad[ i ].name, krb5_ad[ i ].adp, &text ); + if ( rc != LDAP_SUCCESS ) { + Debug( LDAP_DEBUG_ANY, "smbk5pwd: " + "unable to find \"%s\" attributeType: %s (%d).\n", + krb5_ad[ i ].name, text, rc ); + oc_krb5KDCEntry = NULL; + return rc; + } + } + + /* Initialize Kerberos context */ + ret = krb5_init_context(&context); + if (ret) { + Debug( LDAP_DEBUG_ANY, "smbk5pwd: " + "unable to initialize krb5 context (%d).\n", + ret, 0, 0 ); + oc_krb5KDCEntry = NULL; + return -1; + } + + ret = kadm5_s_init_with_password_ctx( context, + KADM5_ADMIN_SERVICE, + NULL, + KADM5_ADMIN_SERVICE, + &conf, 0, 0, &kadm_context ); + if (ret) { + char *err_str, *err_msg = "<unknown error>"; + err_str = krb5_get_error_string( context ); + if (!err_str) + err_msg = (char *)krb5_get_err_text( context, ret ); + Debug( LDAP_DEBUG_ANY, "smbk5pwd: " + "unable to initialize krb5 admin context: %s (%d).\n", + err_str ? err_str : err_msg, ret, 0 ); + if (err_str) + krb5_free_error_string( context, err_str ); + krb5_free_context( context ); + oc_krb5KDCEntry = NULL; + return -1; + } + + db = _kadm5_s_get_db( kadm_context ); + } +#endif /* DO_KRB5 */ + +#ifdef DO_SAMBA + if ( SMBK5PWD_DO_SAMBA( pi ) && oc_sambaSamAccount == NULL ) { + int i, rc; + + oc_sambaSamAccount = oc_find( "sambaSamAccount" ); + if ( !oc_sambaSamAccount ) { + Debug( LDAP_DEBUG_ANY, "smbk5pwd: " + "unable to find \"sambaSamAccount\" objectClass.\n", + 0, 0, 0 ); + return -1; + } + + for ( i = 0; samba_ad[ i ].name != NULL; i++ ) { + const char *text; + + *(samba_ad[ i ].adp) = NULL; + + rc = slap_str2ad( samba_ad[ i ].name, samba_ad[ i ].adp, &text ); + if ( rc != LDAP_SUCCESS ) { + Debug( LDAP_DEBUG_ANY, "smbk5pwd: " + "unable to find \"%s\" attributeType: %s (%d).\n", + samba_ad[ i ].name, text, rc ); + oc_sambaSamAccount = NULL; + return rc; + } + } + } +#endif /* DO_SAMBA */ + +#ifdef DO_SHADOW + if ( SMBK5PWD_DO_SHADOW( pi ) && oc_shadowAccount == NULL ) { + int i, rc; + + oc_shadowAccount = oc_find( "shadowAccount" ); + if ( !oc_shadowAccount ) { + Debug( LDAP_DEBUG_ANY, "smbk5pwd: " + "unable to find \"shadowAccount\" objectClass.\n", + 0, 0, 0 ); + return -1; + } + + for ( i = 0; shadow_ad[ i ].name != NULL; i++ ) { + const char *text; + + *(shadow_ad[ i ].adp) = NULL; + + rc = slap_str2ad( shadow_ad[ i ].name, shadow_ad[ i ].adp, &text ); + if ( rc != LDAP_SUCCESS ) { + Debug( LDAP_DEBUG_ANY, "smbk5pwd: " + "unable to find \"%s\" attributeType: %s (%d).\n", + shadow_ad[ i ].name, text, rc ); + oc_shadowAccount = NULL; + return rc; + } + } + } +#endif /* DO_SHADOW */ + + return 0; +} + +static int +smbk5pwd_db_init(BackendDB *be, ConfigReply *cr) +{ + slap_overinst *on = (slap_overinst *)be->bd_info; + smbk5pwd_t *pi; + + pi = ch_calloc( 1, sizeof( smbk5pwd_t ) ); + if ( pi == NULL ) { + return 1; + } + on->on_bi.bi_private = (void *)pi; + + return 0; +} + +static int +smbk5pwd_db_open(BackendDB *be, ConfigReply *cr) +{ + slap_overinst *on = (slap_overinst *)be->bd_info; + smbk5pwd_t *pi = (smbk5pwd_t *)on->on_bi.bi_private; + + int rc; + + if ( pi->mode == 0 ) { + pi->mode = SMBK5PWD_F_ALL; + } + + rc = smbk5pwd_modules_init( pi ); + if ( rc ) { + return rc; + } + + return 0; +} + +static int +smbk5pwd_db_destroy(BackendDB *be, ConfigReply *cr) +{ + slap_overinst *on = (slap_overinst *)be->bd_info; + smbk5pwd_t *pi = (smbk5pwd_t *)on->on_bi.bi_private; + + if ( pi ) { + ch_free( pi ); + } + + return 0; +} + +int +smbk5pwd_initialize(void) +{ + int rc; + + smbk5pwd.on_bi.bi_type = "smbk5pwd"; + + smbk5pwd.on_bi.bi_db_init = smbk5pwd_db_init; + smbk5pwd.on_bi.bi_db_open = smbk5pwd_db_open; + smbk5pwd.on_bi.bi_db_destroy = smbk5pwd_db_destroy; + + smbk5pwd.on_bi.bi_extended = smbk5pwd_exop_passwd; + +#ifdef DO_KRB5 + smbk5pwd.on_bi.bi_op_bind = smbk5pwd_op_bind; + + lutil_passwd_add( (struct berval *)&k5key_scheme, k5key_chk, k5key_hash ); +#endif + + smbk5pwd.on_bi.bi_cf_ocs = smbk5pwd_cfocs; + + rc = config_register_schema( smbk5pwd_cfats, smbk5pwd_cfocs ); + if ( rc ) { + return rc; + } + + return overlay_register( &smbk5pwd ); +} + +#if SLAPD_OVER_SMBK5PWD == SLAPD_MOD_DYNAMIC +int init_module(int argc, char *argv[]) { + return smbk5pwd_initialize(); +} +#endif + +#endif /* defined(SLAPD_OVER_SMBK5PWD) */ |