Adding upstream version 2.4.47+dfsg.upstream/2.4.47+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 346 insertions, 0 deletions

diff --git a/contrib/slapd-modules/nssov/group.c b/contrib/slapd-modules/nssov/group.c
new file mode 100644
index 0000000..3452357
--- /dev/null
+++ b/contrib/slapd-modules/nssov/group.c
@@ -0,0 +1,346 @@
+/* group.c - group lookup routines */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>. 
+ *
+ * Copyright 2008-2018 The OpenLDAP Foundation.
+ * Portions Copyright 2008-2009 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:
+ * This code references portions of the nss-ldapd package
+ * written by Arthur de Jong. The nss-ldapd code was forked
+ * from the nss-ldap library written by Luke Howard.
+ */
+
+#include "nssov.h"
+
+/* for gid_t */
+#include <grp.h>
+
+/* ( nisSchema.2.2 NAME 'posixGroup' SUP top STRUCTURAL
+ *   DESC 'Abstraction of a group of accounts'
+ *   MUST ( cn $ gidNumber )
+ *   MAY ( userPassword $ memberUid $ description ) )
+ *
+ * apart from that the above the uniqueMember attributes may be
+ * supported in a coming release (they map to DNs, which is an extra
+ * lookup step)
+ *
+ * using nested groups (groups that are member of a group) is currently
+ * not supported, this may be added in a later release
+ */
+
+/* the basic search filter for searches */
+static struct berval group_filter = BER_BVC("(objectClass=posixGroup)");
+
+/* the attributes to request with searches */
+static struct berval group_keys[] = {
+	BER_BVC("cn"),
+	BER_BVC("userPassword"),
+	BER_BVC("gidNumber"),
+	BER_BVC("memberUid"),
+	BER_BVC("uniqueMember"),
+	BER_BVNULL
+};
+
+#define	CN_KEY	0
+#define	PWD_KEY	1
+#define	GID_KEY	2
+#define	UID_KEY	3
+#define	MEM_KEY	4
+
+/* default values for attributes */
+static struct berval default_group_userPassword     = BER_BVC("*"); /* unmatchable */
+
+NSSOV_CBPRIV(group,
+	nssov_info *ni;
+	char buf[256];
+	struct berval name;
+	struct berval gidnum;
+	struct berval user;
+	int wantmembers;);
+
+/* create a search filter for searching a group entry
+	 by member uid, return -1 on errors */
+static int mkfilter_group_bymember(nssov_group_cbp *cbp,struct berval *buf)
+{
+	struct berval dn;
+	/* try to translate uid to DN */
+	nssov_uid2dn(cbp->op,cbp->ni,&cbp->user,&dn);
+	if (BER_BVISNULL(&dn)) {
+		if (cbp->user.bv_len + cbp->mi->mi_filter.bv_len + cbp->mi->mi_attrs[UID_KEY].an_desc->ad_cname.bv_len + 6 >
+			buf->bv_len )
+			return -1;
+		buf->bv_len = snprintf(buf->bv_val, buf->bv_len, "(&%s(%s=%s))",
+			cbp->mi->mi_filter.bv_val, cbp->mi->mi_attrs[UID_KEY].an_desc->ad_cname.bv_val,
+			cbp->user.bv_val );
+	} else { /* also lookup using user DN */
+		if (cbp->user.bv_len + cbp->mi->mi_filter.bv_len + cbp->mi->mi_attrs[UID_KEY].an_desc->ad_cname.bv_len +
+			dn.bv_len + cbp->mi->mi_attrs[MEM_KEY].an_desc->ad_cname.bv_len + 12 > buf->bv_len )
+			return -1;
+		buf->bv_len = snprintf(buf->bv_val, buf->bv_len, "(&%s(|(%s=%s)(%s=%s)))",
+			cbp->mi->mi_filter.bv_val,
+			cbp->mi->mi_attrs[UID_KEY].an_desc->ad_cname.bv_val, cbp->user.bv_val,
+			cbp->mi->mi_attrs[MEM_KEY].an_desc->ad_cname.bv_val, dn.bv_val );
+	}
+	return 0;
+}
+
+NSSOV_INIT(group)
+
+/*
+	 Checks to see if the specified name is a valid group name.
+
+	 This test is based on the definition from POSIX (IEEE Std 1003.1, 2004,
+	 3.189 Group Name and 3.276 Portable Filename Character Set):
+	 http://www.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap03.html#tag_03_189
+	 http://www.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap03.html#tag_03_276
+
+	 The standard defines group names valid if they only contain characters from
+	 the set [A-Za-z0-9._-] where the hyphen should not be used as first
+	 character.
+*/
+static int isvalidgroupname(struct berval *name)
+{
+	int i;
+
+	if ( !name->bv_val || !name->bv_len )
+		return 0;
+	/* check first character */
+	if ( ! ( (name->bv_val[0]>='A' && name->bv_val[0] <= 'Z') ||
+					 (name->bv_val[0]>='a' && name->bv_val[0] <= 'z') ||
+					 (name->bv_val[0]>='0' && name->bv_val[0] <= '9') ||
+					 name->bv_val[0]=='.' || name->bv_val[0]=='_' ) )
+		return 0;
+	/* check other characters */
+	for (i=1;i<name->bv_len;i++)
+	{
+#ifndef STRICT_GROUPS
+		/* allow spaces too */
+		if (name->bv_val[i] == ' ') continue;
+#endif
+		if ( ! ( (name->bv_val[i]>='A' && name->bv_val[i] <= 'Z') ||
+						 (name->bv_val[i]>='a' && name->bv_val[i] <= 'z') ||
+						 (name->bv_val[i]>='0' && name->bv_val[i] <= '9') ||
+						 name->bv_val[i]=='.' || name->bv_val[i]=='_' || name->bv_val[i]=='-') )
+			return 0;
+	}
+	/* no test failed so it must be good */
+	return -1;
+}
+
+static int write_group(nssov_group_cbp *cbp,Entry *entry)
+{
+	struct berval tmparr[2], tmpgid[2];
+	struct berval *names,*gids,*members;
+	struct berval passwd = {0};
+	Attribute *a;
+	int i,j,nummembers,rc = 0;
+
+	/* get group name (cn) */
+	if (BER_BVISNULL(&cbp->name))
+	{
+		a = attr_find(entry->e_attrs, cbp->mi->mi_attrs[CN_KEY].an_desc);
+		if ( !a )
+		{
+			Debug(LDAP_DEBUG_ANY,"group entry %s does not contain %s value\n",
+					entry->e_name.bv_val, cbp->mi->mi_attrs[CN_KEY].an_desc->ad_cname.bv_val,0);
+			return 0;
+		}
+		names = a->a_vals;
+	}
+	else
+	{
+		names=tmparr;
+		names[0]=cbp->name;
+		BER_BVZERO(&names[1]);
+	}
+	/* get the group id(s) */
+	if (BER_BVISNULL(&cbp->gidnum))
+	{
+		a = attr_find(entry->e_attrs, cbp->mi->mi_attrs[GID_KEY].an_desc);
+		if ( !a )
+		{
+			Debug(LDAP_DEBUG_ANY,"group entry %s does not contain %s value\n",
+					entry->e_name.bv_val, cbp->mi->mi_attrs[GID_KEY].an_desc->ad_cname.bv_val,0);
+			return 0;
+		}
+		gids = a->a_vals;
+	}
+	else
+	{
+		gids=tmpgid;
+		gids[0]=cbp->gidnum;
+		BER_BVZERO(&gids[1]);
+	}
+	/* get group passwd (userPassword) (use only first entry) */
+	a = attr_find(entry->e_attrs, cbp->mi->mi_attrs[PWD_KEY].an_desc);
+	if (a)
+		get_userpassword(&a->a_vals[0], &passwd);
+	if (BER_BVISNULL(&passwd))
+		passwd=default_group_userPassword;
+	/* get group members (memberUid&uniqueMember) */
+	if (cbp->wantmembers) {
+		Attribute *b;
+		i = 0; j = 0;
+		a = attr_find(entry->e_attrs, cbp->mi->mi_attrs[UID_KEY].an_desc);
+		b = attr_find(entry->e_attrs, cbp->mi->mi_attrs[MEM_KEY].an_desc);
+		if ( a )
+			i += a->a_numvals;
+		if ( b )
+			i += b->a_numvals;
+		if ( i ) {
+			members = cbp->op->o_tmpalloc( (i+1) * sizeof(struct berval), cbp->op->o_tmpmemctx );
+			
+			if ( a ) {
+				for (i=0; i<a->a_numvals; i++) {
+					if (isvalidusername(&a->a_vals[i])) {
+						ber_dupbv_x(&members[j],&a->a_vals[i],cbp->op->o_tmpmemctx);
+						j++;
+					}
+				}
+			}
+			a = b;
+			if ( a ) {
+				for (i=0; i<a->a_numvals; i++) {
+					if (nssov_dn2uid(cbp->op,cbp->ni,&a->a_nvals[i],&members[j]))
+						j++;
+				}
+			}
+			nummembers = j;
+			BER_BVZERO(&members[j]);
+		} else {
+			members=NULL;
+			nummembers = 0;
+		}
+
+	} else {
+		members=NULL;
+		nummembers = 0;
+	}
+	/* write entries for all names and gids */
+	for (i=0;!BER_BVISNULL(&names[i]);i++)
+	{
+		if (!isvalidgroupname(&names[i]))
+		{
+			Debug(LDAP_DEBUG_ANY,"nssov: group entry %s contains invalid group name: \"%s\"\n",
+													entry->e_name.bv_val,names[i].bv_val,0);
+		}
+		else
+		{
+			for (j=0;!BER_BVISNULL(&gids[j]);j++)
+			{
+				char *tmp;
+				int tmpint32;
+				gid_t gid;
+				gid = strtol(gids[j].bv_val, &tmp, 0);
+				if ( *tmp ) {
+					Debug(LDAP_DEBUG_ANY,"nssov: group entry %s contains non-numeric %s value: \"%s\"\n",
+						entry->e_name.bv_val, cbp->mi->mi_attrs[GID_KEY].an_desc->ad_cname.bv_val,
+						names[i].bv_val);
+					continue;
+				}
+				WRITE_INT32(cbp->fp,NSLCD_RESULT_BEGIN);
+				WRITE_BERVAL(cbp->fp,&names[i]);
+				WRITE_BERVAL(cbp->fp,&passwd);
+				WRITE_INT32(cbp->fp,gid);
+				/* write a list of values */
+				WRITE_INT32(cbp->fp,nummembers);
+				if (nummembers)
+				{
+					int k;
+					for (k=0;k<nummembers;k++) {
+						WRITE_BERVAL(cbp->fp,&members[k]);
+					}
+				}
+			}
+		}
+	}
+	/* free and return */
+	if (members!=NULL)
+		ber_bvarray_free_x( members, cbp->op->o_tmpmemctx );
+	return rc;
+}
+
+NSSOV_CB(group)
+
+NSSOV_HANDLE(
+	group,byname,
+	char fbuf[1024];
+	struct berval filter = {sizeof(fbuf)};
+	filter.bv_val = fbuf;
+	READ_STRING(fp,cbp.buf);
+	cbp.name.bv_len = tmpint32;
+	cbp.name.bv_val = cbp.buf;
+	if (!isvalidgroupname(&cbp.name)) {
+		Debug(LDAP_DEBUG_ANY,"nssov_group_byname(%s): invalid group name\n",cbp.name.bv_val,0,0);
+		return -1;
+	}
+	cbp.wantmembers = 1;
+	cbp.ni = ni;
+	BER_BVZERO(&cbp.gidnum);
+	BER_BVZERO(&cbp.user);,
+	Debug(LDAP_DEBUG_TRACE,"nslcd_group_byname(%s)\n",cbp.name.bv_val,0,0);,
+	NSLCD_ACTION_GROUP_BYNAME,
+	nssov_filter_byname(cbp.mi,CN_KEY,&cbp.name,&filter)
+)
+
+NSSOV_HANDLE(
+	group,bygid,
+	gid_t gid;
+	char fbuf[1024];
+	struct berval filter = {sizeof(fbuf)};
+	filter.bv_val = fbuf;
+	READ_INT32(fp,gid);
+	cbp.gidnum.bv_val = cbp.buf;
+	cbp.gidnum.bv_len = snprintf(cbp.buf,sizeof(cbp.buf),"%d",gid);
+	cbp.wantmembers = 1;
+	cbp.ni = ni;
+	BER_BVZERO(&cbp.name);
+	BER_BVZERO(&cbp.user);,
+	Debug(LDAP_DEBUG_TRACE,"nssov_group_bygid(%s)\n",cbp.gidnum.bv_val,0,0);,
+	NSLCD_ACTION_GROUP_BYGID,
+	nssov_filter_byid(cbp.mi,GID_KEY,&cbp.gidnum,&filter)
+)
+
+NSSOV_HANDLE(
+	group,bymember,
+	char fbuf[1024];
+	struct berval filter = {sizeof(fbuf)};
+	filter.bv_val = fbuf;
+	READ_STRING(fp,cbp.buf);
+	cbp.user.bv_len = tmpint32;
+	cbp.user.bv_val = cbp.buf;
+	if (!isvalidusername(&cbp.user)) {
+		Debug(LDAP_DEBUG_ANY,"nssov_group_bymember(%s): invalid user name\n",cbp.user.bv_val,0,0);
+		return -1;
+	}
+	cbp.wantmembers = 0;
+	cbp.ni = ni;
+	BER_BVZERO(&cbp.name);
+	BER_BVZERO(&cbp.gidnum);,
+	Debug(LDAP_DEBUG_TRACE,"nssov_group_bymember(%s)\n",cbp.user.bv_val,0,0);,
+	NSLCD_ACTION_GROUP_BYMEMBER,
+	mkfilter_group_bymember(&cbp,&filter)
+)
+
+NSSOV_HANDLE(
+	group,all,
+	struct berval filter;
+	/* no parameters to read */
+	cbp.wantmembers = 1;
+	cbp.ni = ni;
+	BER_BVZERO(&cbp.name);
+	BER_BVZERO(&cbp.gidnum);,
+	Debug(LDAP_DEBUG_TRACE,"nssov_group_all()\n",0,0,0);,
+	NSLCD_ACTION_GROUP_ALL,
+	(filter=cbp.mi->mi_filter,0)
+)