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140 lines
3.7 KiB
140 lines
3.7 KiB
// Copyright 2007-2010 Mir Calculate Ltd. http://www.calculate-linux.org
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <security/pam_modules.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdarg.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <ctype.h>
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#include <asm/unistd.h>
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#include "keyutils.h"
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#define PAM_SM_AUTH
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#define MAX_V 30
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// if (strcmp(arg, "@t" ) == 0) return KEY_SPEC_THREAD_KEYRING;
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// if (strcmp(arg, "@p" ) == 0) return KEY_SPEC_PROCESS_KEYRING;
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// if (strcmp(arg, "@s" ) == 0) return KEY_SPEC_SESSION_KEYRING;
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// if (strcmp(arg, "@u" ) == 0) return KEY_SPEC_USER_KEYRING;
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// if (strcmp(arg, "@us") == 0) return KEY_SPEC_USER_SESSION_KEYRING;
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// if (strcmp(arg, "@g" ) == 0) return KEY_SPEC_GROUP_KEYRING;
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// if (strcmp(arg, "@a" ) == 0) return KEY_SPEC_REQKEY_AUTH_KEY;
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// Authentication function
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PAM_EXTERN int pam_sm_authenticate(pam_handle_t * pamh, int flags
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,int argc, const char **argv)
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{
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unsigned int ctrl;
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int retval;
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const char *name, *p;
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char *token;
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// Get username
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retval = pam_get_user(pamh, &name, "login: ");
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if (retval!=PAM_SUCCESS) {return PAM_AUTH_ERR;};
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// Structure for pam-functions
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struct pam_conv *conv;
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// Structure for pam-messages
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struct pam_message *pmsg[3],msg[3];
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// Structure for pam-pesponse
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struct pam_response *response;
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// Get the function to obtain a password
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retval = pam_get_item( pamh, PAM_CONV, (const void **) &conv );
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if (retval!=PAM_SUCCESS) {return PAM_AUTH_ERR;}
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int flag = 0;
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for (ctrl=0; argc-- > 0; ++argv)
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{
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if (!strcmp(*argv,"use_first_pass"))
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{
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retval = pam_get_item(pamh,PAM_AUTHTOK,(const void **)&p);
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if (retval!=PAM_SUCCESS) {return PAM_AUTH_ERR;};
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flag = 1;
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};
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};
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if (flag == 0){
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// Initialize the structure for pam-messages
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pmsg[0] = &msg[0];
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msg[0].msg_style = PAM_PROMPT_ECHO_OFF;
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msg[0].msg="Password:";
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// Get a pointer to the answer pam
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retval = conv->conv(1, ( const struct pam_message ** ) pmsg, &response, conv->appdata_ptr);
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if (retval!=PAM_SUCCESS) {return PAM_AUTH_ERR;};
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// Get Password
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p = response->resp;
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};
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// Ignore the root user
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if (strcmp(name,"root")){
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key_serial_t dest;
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int ret;
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// User id and gid
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uid_t uid, gid;
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// Get user id and gid
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uid = getuid();
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gid = getgid();
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if (uid==0 && gid==0){
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// Get id (user key)
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dest = KEY_SPEC_USER_SESSION_KEYRING;
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// Write the key in the keystore kernel (space of root)
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ret = add_key("user", name, p, strlen(p), dest);
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};
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}
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if (p) {
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// Copy password for send to next module
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token = strdup(p);
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p=NULL;
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// Send password to next module
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retval = pam_set_item (pamh, PAM_AUTHTOK, (const void *) token);
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if (retval == PAM_SUCCESS) {return PAM_SUCCESS;}
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}
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return PAM_AUTH_ERR;
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}
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// Empty function, necessary for pam-module
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PAM_EXTERN int pam_sm_setcred(pam_handle_t * pamh, int flags
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,int argc, const char **argv)
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{
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return PAM_SUCCESS;
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}
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#ifdef PAM_STATIC
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struct pam_module _pam_unix_auth_modstruct = {
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"pam_permit",
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pam_sm_authenticate,
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pam_sm_setcred,
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NULL,
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NULL,
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NULL,
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NULL,
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};
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#endif
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