[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

Proper use of pam_get_item()



Gathering username/password from PAM. I am having a hard time attempting to gather the user credentials. Here is my code:

/* PAM includes */
#include <security/pam_modules.h>
#include <security/_pam_macros.h>
#include <security/pam_appl.h>

/* PAM definitions */
#define PAM_SM_ACCOUNT
#define PAM_SM_AUTH
#define PAM_SM_PASSWORD
#define PAM_SM_SESSION

typedef struct usrData * udataptr;
struct usrData {
   const char * usrname;
   char * password;
} localUser;

/* Handle our authentication process */
PAM_EXTERN
int pam_sm_authenticate( pam_handle_t *pamh, int flags, int argc,
                        const char **argv )
{
   int retval, i;
   udataptr myUser = &localUser;
   myConfigPtr myConfig = &localConfig;
   char user[15];
   const void ** password;

myUser->usrname=user;

   struct pam_conv *conv = NULL;
   struct pam_message message;
   const struct pam_message *msg;
   struct pam_response *response;

/* Get our username from PAM */
if( ( retval = pam_get_user( pamh, &( myUser->usrname ), "PAM_test login: " ) != PAM_SUCCESS ) ) {
_pam_log( LOG_ERR, "Error: %s", pam_strerror( pamh, retval ) );
return 1;
} else {
_pam_log( LOG_ERR, "Obtained Username: %s", myUser->usrname );


}

/* PAM conversion stuff just to get to the bloody password */
if( ( retval = pam_get_item( pamh, PAM_CONV, ( const void ** ) &conv ) != PAM_SUCCESS ) ) {
_pam_log( LOG_ERR, "Error: %s", pam_strerror( pamh, retval ) );
return 1;
} else {
message.msg_style = PAM_PROMPT_ECHO_OFF;
message.msg = "pam_test login: ";
msg = &message;
retval = ( *conv->conv )( 1, &msg, &response, conv->appdata_ptr );
if( retval == PAM_SUCCESS ) {


// THIS IS WHERE IT CRASHES??? I am passing the 3rd argument correctly as a const void **
if( ( retval = pam_get_item( pamh, PAM_AUTHTOK, password ) != PAM_SUCCESS ) ) {
_pam_log( LOG_ERR, "Error: %s", pam_strerror( pamh, retval ) );
return 1;
} else {
strcpy( *( &( myUser->password ) ), *password );
}
} else {
_pam_log( LOG_ERR, "Error: %s", pam_strerror( pamh, retval ) );
return 1;
}
}


Any help is appreciated...

--
Jason Gerfen
jason gerfen scl utah edu

"And remember... If the ladies
don't find you handsome, they
should at least find you handy..."
            ~The Red Green show


[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]