src/auth/ldap.c

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#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <ldap.h>

#include "class.h"
#include "utils/memory.h"
#include "commons.h"

#include "auth/ldap.h"
#include "auth/credential.h"
#include "auth/interface/auth.h"

static
int
authLdapCtor(void * _this, va_list * params)
{
        AuthLdap this = _this;
        char *   url  = va_arg(*params, char*);
        char *   base_dn;

        this->url = malloc(strlen(url) + 1);
        strcpy(this->url, url);

        this->version  = 3;

        base_dn        = va_arg(* params, char *);
        this->nbase_dn = va_arg(* params, size_t);
        
        this->base_dn = malloc(this->nbase_dn + 1);
        this->base_dn[this->nbase_dn] = 0;
        memcpy(this->base_dn, base_dn, this->nbase_dn);

        return 0;
}

static
void
authLdapDtor(void * _this)
{
        AuthLdap this = _this;

        FREE(this->base_dn);
        FREE(this->url);
}

static
int
authLdapAuthenticate(void * _this, Credential cred)
{
        AuthLdap this = _this;
        char     who[256];
        char *   who_ptr = who;
        int      ldap_err;

        if (CRED_PASSWORD != cred->type) {
                return FALSE;
        }

        ldap_initialize(&(this->ldap), this->url);
        ldap_set_option(this->ldap, LDAP_OPT_PROTOCOL_VERSION, &(this->version));

        memcpy(who_ptr, "cn=", sizeof("cn=") - 1);
        who_ptr   += sizeof("cn=") - 1;
        memcpy(who_ptr, CRED_PWD(cred).user, CRED_PWD(cred).nuser);
        who_ptr += CRED_PWD(cred).nuser;
        *who_ptr++ = ',';
        memcpy(who_ptr, this->base_dn, this->nbase_dn);
        who_ptr[this->nbase_dn] = 0;

        ldap_err = ldap_simple_bind_s(this->ldap, who, CRED_PWD(cred).pass);
        if (0 == ldap_err) {
                ldap_unbind_s(this->ldap);
                return TRUE;
        }

        fprintf(stderr, "%s\n", ldap_err2string(ldap_err));
        return FALSE;
}

INIT_IFACE(Class, authLdapCtor, authLdapDtor, NULL);
INIT_IFACE(Auth, authLdapAuthenticate);
CREATE_CLASS(AuthLdap, NULL, IFACE(Class), IFACE(Auth));

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