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该代码示例展示了如何用C语言进行LDAP认证，并添加新的用户条目到目录服务。它初始化LDAP连接，设置协议版本，执行简单的绑定操作，然后尝试添加一个包含特定属性（如cn,sn,userPassword,mail）的新用户条目。

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#include <stdio.h>
#include <cstdlib>
//#include <iostream>
//using namespace std;
extern "C"
{
    #define LDAP_DEPRECATED 1
    #include <ldap.h>
    #include <lber.h>
}
 
 
#define HOST "192.168.99.99"
#define PORT 389
#define WHO "cn=admin,dc=nodomain"
#define PASSWD "secret"
#define FIND_DN "dc=nodomain"
 
bool auth()
{
    LDAP *ld;
    //BerElement *ber;
 
    char *a; 
    char **vals;
    int i, rc; 
    int i_version = LDAP_VERSION3;
 
 
    ld = ldap_init(HOST, PORT);
    if(ld == NULL)
    {
        perror("ldap_init");
        return false;
    }   
    printf("ldap_init success\n");
 
 
    ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, &i_version);
    ldap_set_option(ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON);
     
    rc = ldap_simple_bind_s(ld, WHO, PASSWD);
    if(rc != LDAP_SUCCESS)
    {
        fprintf(stderr, "ldap_simple_bind_s: rc: %d, %s\n", rc, ldap_err2string(rc));
        return false;
    }
    printf("ldap_simple_bind_s success\n");
    
    // 创建用户的属性
    //dn: uid=690106015133,ou=Employees,ou=People,dc=upm,dc=nodomain
    const char *dn = "uid=888888,ou=Employees,ou=People,dc=upm,dc=nodomain";  
    
    char* object_class[] = {"person", "inetOrgPerson", NULL};  
    char* cn[] = {"John Doe", NULL};
    char* sn[] = {"Doe", NULL};
    char* userPassword[] = {"666666", NULL};
    char* mail[] = {"john.doe@example.com", NULL};
    //char* uid[] = {"88888888", NULL};
    //char* attributes[] = {"cn", cn, "sn", sn, "userPassword", userPassword, "mail", mail, "uid", uid, NULL};
	
	
	
    LDAPMod object_class_mod = { LDAP_MOD_ADD, "objectClass", object_class };
    LDAPMod cn_mod = { LDAP_MOD_ADD, "cn", cn };
    LDAPMod sn_mod = { LDAP_MOD_ADD, "sn", sn };
    LDAPMod userPassword_mod = { LDAP_MOD_ADD, "userPassword", userPassword};
    LDAPMod mail_mod = { LDAP_MOD_ADD, "mail", mail };
    //LDAPMod uid_mod = {LDAP_MOD_ADD, "uid", uid};
    LDAPMod* mods[] = { &object_class_mod, &cn_mod, &sn_mod, &userPassword_mod, &mail_mod, /*&uid_mod,*/ NULL };
	
    rc = ldap_add_ext_s(ld, dn, mods, NULL, NULL);

    if(rc == LDAP_SUCCESS)
    {
       // std::cout << "LDAP add operation succeeded." << std::endl;
        printf("成功添加\n");
    }
    else
    {
       // std::cout << "LDAP add operation failed: " << ldap_err2string(rc) << std::endl;
	printf("添加失败\n");
    }

    // 断开 LDAP 连接
    ldap_unbind_ext_s(ld, NULL, NULL);
   
 
    return true;
}
 
int main()
{
    auth();
    return 0;
}