lib/libnisdb/ldap_attr.c

	ldap_attr.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2001-2003 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <sys/systeminfo.h>
#include <strings.h>
#include <rpcsvc/nis.h>

#include "nis_parse_ldap_conf.h"

#include "ldap_attr.h"
#include "ldap_util.h"
#include "ldap_structs.h"


/*
 * If 'name' doesn't end in a trailing dot, return a copy with the
 * value of "nisplusLDAPbaseDomain" appended. Otherwise, return a
 * copy of 'name'. If deallocate!=0, free 'name'.
 */
char *
fullObjName(int deallocate, char *name) {
    int l;
    char    *full;
    char    *myself = "fullObjName";

    if (name == 0)
        return (sdup(myself, T, proxyInfo.default_nis_domain));

    l = strlen(name);
    if (name[l-1] == '.') {
        full = sdup(myself, T, name);
    } else {
        full = scat(myself, T, scat(myself, F, name, "."),
            sdup(myself, T, proxyInfo.default_nis_domain));
    }
    if (deallocate)
        free(name);

    return (full);
}

/*
 * Convert a domain name ("x.y.z.", say) to a "dc=..." type LDAP equivalent
 * ("dc=x,dc=y,dx=z"). The domain name supplied MUST be terminated by a
 * trailing dot. If 'domain' is NULL, the value of "nisplusLDAPbaseDomain"
 * is converted.
 */
char *
domain2base(char *domain) {
    char    *base = 0;
    int l, i;
    char    *myself = "domain2base";

    if (domain == 0)
        domain = sdup(myself, T, proxyInfo.default_nis_domain);
    if (domain == 0)
        return (0);

    for (l = 0, i = 0; domain[i] != '\0'; i++) {
        if (domain[i] == '.') {
            domain[i] = '\0';
            if (l != 0)
                base = scat(myself, T, base,
                    scat(myself, F, ",dc=", &domain[l]));
            else
                base = scat(myself, T, base,
                    scat(myself, F, "dc=", &domain[l]));
            l = i+1;
        }
    }

    return (base);
}

/*
 * If 'name' ends in a trailing comma, append the value of the
 * "defaultSearchBase". If deallocate!=0, free 'name'.
 */
char *
fullLDAPname(int deallocate, char *name) {
    int err = 0;

    return (appendBase(name, proxyInfo.default_search_base, &err,
                deallocate));
}

/*
 * If the 'item' string ends in a comma, append 'base', and return
 * the result. On exit, '*err' will be zero if successful, non-zero
 * otherwise. If 'dealloc' is non-zero, 'item' is freed; this happens
 * even if an error status is returned.
 *
 * The return value is always allocated, and must be freed by the caller.
 */
char *
appendBase(char *item, char *base, int *err, int dealloc) {
    char    *new;
    int len, deferr;
    char    *myself = "appendBase";

    /*
     * Make sure that 'err' points to something valid, so that we can
     * dispense with all those 'if (err != 0)'.
     */
    if (err == 0)
        err = &deferr;

    /* Establish default (successful) error status */
    *err = 0;

    /* Trivial case 1: If 'item' is NULL, return a copy of 'base' */
    if (item == 0) {
        new = sdup(myself, T, base);
        if (new == 0)
            *err = -1;
        return (new);
    }

    /* Trivial case 2: If 'base' is NULL, return a copy of 'item' */
    if (base == 0) {
        new = sdup(myself, T, item);
        if (new == 0)
            *err = -1;
        if (dealloc)
            free(item);
        return (new);
    }

    len = strlen(item);

    /* If 'item' is the empty string, return a copy of 'base' */
    if (len <= 0) {
        new = sdup(myself, T, base);
        if (new == 0)
            *err = -1;
        if (dealloc)
            free(item);
        return (new);
    }

    /*
     * If 'item' ends in a comma, append 'base', and return a copy
     * of the result. Otherwise, return a copy of 'item'.
     */
    if (item[len-1] == ',') {
        int blen = slen(base);
        new = am(myself, len + blen + 1);
        if (new != 0) {
            (void) memcpy(new, item, len);
            (void) memcpy(&new[len], base, blen);
        } else {
            *err = -1;
        }
    } else {
        new = sdup(myself, T, item);
        if (new == 0)
            *err = -1;
    }

    if (dealloc)
        free(item);

    return (new);
}

/*
 * Despite its general-sounding name, this function only knows how to
 * turn a list of attributes ("a,b,c") into an AND filter ("(&(a)(b)(c))").
 */
char *
makeFilter(char *attr) {
    int len, s, e, c;
    char    *str, *filter, *tmp;
    char    *myself = "makeFilter";

    if (attr == 0 || (len = strlen(attr)) == 0)
        return (0);

    /* Assume already of appropriate form if first char is '(' */
    if (len > 1 && attr[0] == '(' && attr[len-1] == ')')
        return (sdup(myself, T, attr));

    str = sdup(myself, T, attr);
    if (str == 0)
        return (0);
    filter = sdup(myself, T, "(&");
    if (filter == 0) {
        free(str);
        return (0);
    }
    for (s = c = 0; s < len; s = e+1) {
        /* Skip blank space, if any */
        for (0; str[s] == ' ' || str[s] == '\t'; s++);
        /* Find delimiter (comma) or end of string */
        for (e = s; str[e] != '\0' && str[e] != ','; e++);
        str[e] = '\0';
        tmp = scat(myself, T, sdup(myself, T, "("),
            scat(myself, F, &str[s], ")"));
        if (tmp == 0) {
            sfree(filter);
            return (0);
        }
        c++;
        filter = scat(myself, T, filter, tmp);
    }

    /*
     * If there's just one component, we return it as is. This
     * means we avoid turning "objectClass=posixAccount" into
     * "(&(objectClass=posixAccount))".
     */
    if (c == 1) {
        sfree(filter);
        return (str);
    }

    /* Add the closing ')' */
    tmp = filter;
    filter = scat(myself, F, tmp, ")");
    sfree(tmp);

    free(str);

    return (filter);
}

/*
 * Split an AND-filter string into components.
 */
char **
makeFilterComp(char *filter, int *numComps) {
    int nc = 0, s, e, i;
    char    **comp = 0, **new, *str;
    int len;
    char    *myself = "makeFilterComp";

    if ((len = slen(filter)) <= 0)
        return (0);

    /* Is it just a plain "attr=val" string ? If so, return a copy */
    if (len <= 2 || filter[0] != '(') {
        comp = am(myself, 2 * sizeof (comp[0]));
        if (comp == 0)
            return (0);
        comp[0] = sdup(myself, T, filter);
        if (comp[0] == 0) {
            sfree(comp);
            return (0);
        }
        if (numComps != 0)
            *numComps = 1;
        return (comp);
    }

    if (filter != 0 && (len = strlen(filter)) != 0 && len > 2 &&
            filter[0] == '(' && filter[1] == '&' &&
            filter[len-1] == ')') {
        str = sdup(myself, T, filter);
        if (str == 0)
            return (0);
        for (s = 2; s < len; s = e+1) {
            /* Skip past the '(' */
            for (0; s < len && str[s] != '('; s++);
            s++;
            if (s >= len)
                break;
            for (e = s; str[e] != '\0' && str[e] != ')'; e++);
            str[e] = '\0';
            new = realloc(comp, (nc+1) * sizeof (comp[nc]));
            if (new == 0) {
                if (comp != 0) {
                    for (i = 0; i < nc; i++)
                        sfree(comp[i]);
                    free(comp);
                    comp = 0;
                }
                nc = 0;
                break;
            }
            comp = new;
            comp[nc] = sdup(myself, T, &str[s]);
            if (comp[nc] == 0) {
                for (i = 0; i < nc; i++)
                    sfree(comp[i]);
                sfree(comp);
                comp = 0;
                nc = 0;
                break;
            }
            nc++;
        }
        sfree(str);
    }

    if (numComps != 0)
        *numComps = nc;

    return (comp);
}

void
freeFilterComp(char **comp, int numComps) {
    int i;

    if (comp == 0)
        return;

    for (i = 0; i < numComps; i++) {
        sfree(comp[i]);
    }
    free(comp);
}

char **
addFilterComp(char *new, char **comp, int *numComps) {
    char    **tmp, *str;
    char    *myself = "addFilterComp";

    if (new == 0 || numComps == 0 || *numComps < 0)
        return (comp);

    str = sdup(myself, T, new);
    if (str == 0)
        return (0);
    tmp = realloc(comp, ((*numComps)+1) * sizeof (comp[0]));
    if (tmp == 0) {
        sfree(str);
        return (0);
    }

    comp = tmp;
    comp[*numComps] = str;
    *numComps += 1;

    return (comp);
}

char *
concatenateFilterComps(int numComps, char **comp) {
    int     i;
    __nis_buffer_t  b = {0, 0};
    char        *myself = "concatenateFilterComps";

    if (numComps == 0 || comp == 0)
        return (0);

    bp2buf(myself, &b, "(&");
    for (i = 0; i < numComps; i++) {
        if (comp[i] == 0)
            continue;
        bp2buf(myself, &b, "(%s)", comp[i]);
    }
    bp2buf(myself, &b, ")");

    return (b.buf);
}

void
freeDNs(char **dn, int numDN) {
    int i;

    if (dn == 0)
        return;

    for (i = 0; i < numDN; i++) {
        sfree(dn[i]);
    }
    sfree(dn);
}

/*
 * Search the supplied rule-value structure array for any attributes called
 * "dn", and return their values. If the "dn" value(s) end in a comma, they
 * get the 'defBase' value appended.
 */
char **
findDNs(char *msg, __nis_rule_value_t *rv, int nrv, char *defBase,
        int *numDN) {
    char    **dn;
    int irv, iv, ndn;
    char    *myself = "findDNs";

    if (rv == 0 || nrv <= 0 || numDN == 0)
        return (0);

    if (msg == 0)
        msg = myself;

    /* Avoid realloc() by pre-allocating 'dn' at maximum size */
    dn = am(msg, nrv * sizeof (dn[0]));
    if (dn == 0)
        return (0);

    for (ndn = 0, irv = 0; irv < nrv; irv++) {
        for (iv = 0; iv < rv[irv].numAttrs; iv++) {
            /* Looking for string-valued attribute called "dn" */
            if (rv[irv].attrName[iv] != 0 &&
                rv[irv].attrVal[iv].type == vt_string &&
                rv[irv].attrVal[iv].numVals >= 1 &&
                strcasecmp("dn", rv[irv].attrName[iv]) == 0) {
                int err = 0;
                dn[ndn] = appendBase(
                    rv[irv].attrVal[iv].val[0].value,
                    defBase, &err, 0);
                if (err != 0) {
                    freeDNs(dn, ndn);
                    return (0);
                }
                ndn++;
                break;
            }
        }
    }

    *numDN = ndn;
    return (dn);
}