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archie/prospero/user/psession.c

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Intial commit
2024-05-27 16:13:40 +02:00
/*
* Copyright (c) 1993 by the University of Southern California
*
* For copying and distribution information, please see the file
* <usc-license.h>.
*
* psession was written by Prasad Upasani
*/
/*!! This looks like it leaks fp's on failure */
#include <usc-license.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <posix_signal.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <pfs.h>
#include <pprot.h>
#include <termios.h>
#include <perrno.h>
static int ppw();
static int account();
static void abort_pwread();
static void abort_prog();
static int read_password();
static int write_ppw_to_file();
static int delete_ppw_entry();
static VLINK p_get_vsdesc();
static TOKEN get_vsdesc_principals();
static int usage();
static char *canonicalize();
static char *uppercase();
static int read_and_set_password();
static int delete_passwd_frm_entries();
static int set_princ_with_no_passwd();
static char *addr_to_name();
static char *get_host_from_user();
static int write_acc_to_file();
char *get_psession_filename();
char *prog;
int pfs_debug = 0;
void
main(int argc, char *argv[])
{
prog = argv[0];
p_initialize("ufP", 0, (struct p_initialize_st *) NULL);
if (argc < 2)
usage();
if (strequal(argv[0], "ppw")) {
argc --, argv++;
ppw(argc, argv, 0);
}
else if (strequal(argv[1], "-p_password")) {
argc -=2, argv+=2;
ppw(argc, argv, 0);
}
else if (argc > 2 && strequal(argv[1], "-authenticate")) {
argc -=2, argv+=2;
if (strequal(argv[0], "P_PASSWORD"))
ppw(--argc, ++argv, 0);
else if (strequal(argv[0], "KERBEROS"))
add_krb_entry(--argc, ++argv);
}
else if (strequal(argv[1], "-account")) {
argc-=2, argv+=2;
account(argc, argv);
}
else if (strequal(argv[1], "-delete")) {
argc-=2, argv+=2;
if (strequal(argv[0], "-authenticate")) {
argc--, argv++;
if (strequal(argv[0], "P_PASSWORD"))
ppw(--argc, ++argv, 1);
else if (strequal(argv[0], "KERBEROS"))
del_krb_entry(--argc, ++argv);
else if (strequal(argv[0], "UNAUTHENTICATED"))
del_unauth_entry(--argc, ++argv);
}
else if (strequal(argv[0], "-account"))
del_acc_entry(--argc, ++argv);
}
else if (strequal(argv[1], "-zero")) {
if (delete_passwd_frm_entries(NULL, NULL))
fprintf(stderr,
"Could not delete password from entry!\n");
}
else
usage();
exit(0); /* exit successfully */
}
static int ppw(int argc, char *argv[], int dflag)
{
#ifndef P_P_PASSWORD
fputs("Prospero Passwords are not in use at this site.\n", stderr);
exit(1);
#else
RREQ req;
char *dirhst = NULL;
int sflag = 0, mflag = 0, zflag = 0;
TOKEN princp, princ_list = NULL;
char old_password[255], new_password[255];
PAUTH authinfo; /* Structure containing authentication info */
PAUTH authp; /* To iterate through authinfo list */
char prompt[255];
while (argc > 0 && **argv == '-') {
switch (*(argv[0]+1)) {
case 'D':
pfs_debug = 1; /* Default debug level */
sscanf(argv[0],"-D%d",&pfs_debug);
break;
case 'N': /* Priority (nice) */
ardp_priority = ARDP_MAX_PRI; /* Use this if no # */
sscanf(argv[0],"-N%d",&ardp_priority);
if(ardp_priority > ARDP_MAX_SPRI)
ardp_priority = ARDP_MAX_PRI;
if(ardp_priority < ARDP_MIN_PRI)
ardp_priority = ARDP_MIN_PRI;
break;
case 's':
if (dflag || zflag) {
fprintf(stderr, "Only one of -s, -z, and -d allowed!\n");
usage();
}
sflag = 1; /* Set principal's password in remote server's */
break; /* password file */
case 'm':
if (dflag || zflag) {
fprintf(stderr, "-m not allowed with -d or -z!\n");
usage();
}
mflag = 1; /* Maintainer, old passwd not required */
break;
case 'd':
if (sflag || zflag) {
fprintf(stderr, "Only one of -s, -z, and -d allowed!\n");
usage();
}
dflag = 1; /* Delete principal's password entry */
break;
case 'z':
if (sflag || dflag) {
fprintf(stderr, "Only one of -s, -z and -d allowed!\n");
usage();
}
zflag = 1; /* Delete just password from entry */
break;
case 'p': /* principal specified */
argc--; argv++;
princ_list = tkappend(argv[0], princ_list);
break;
default:
usage();
}
argc--; argv++;
}
if(argc > 1)
usage();
if(argc > 0)
dirhst = stcopyr(argv[0],dirhst);
if (sflag) {
if (!princ_list) {
/* Get default principals from instances of PRINCIPAL */
/* attribute of VS-DESCRIPTION */
if (!(princ_list = get_vsdesc_principals())) {
fprintf(stderr, "No principals found!\n");
usage();
}
}
if (!dirhst) {
if (!(dirhst = get_host_from_user(princ_list))) {
dirhst = stalloc(255);
gethostname(dirhst, p__bstsize(dirhst));
}
}
for (princp = princ_list; princp; princp = princp->next) {
if (mflag)
req = p__start_req(dirhst);
else {
if (!(req = ardp_rqalloc()))
out_of_memory();
p__add_req(req, "VERSION %d %s\n",
VFPROT_VNO, PFS_SW_ID);
qsprintf(prompt, sizeof(prompt),
"Old password for %s on host %s",
princp->token, dirhst);
read_password(prompt, old_password, sizeof(old_password));
p__add_req(req, "AUTHENTICATE OPTIONAL P_PASSWORD %'s %'s\n",
old_password, princp->token);
}
qsprintf(prompt, sizeof(prompt),
"New password for %s on host %s",
princp->token, dirhst);
read_password(prompt, new_password, sizeof(new_password));
if (new_password[0] == '\0') {
printf("Password not set!\n");
ardp_rqfree(req);
continue;
}
p__add_req(req, "PARAMETER SET PASSWORD %'s %'s\n",
princp->token, new_password);
if (ardp_send(req,dirhst,0,ARDP_WAIT_TILL_TO)) {
perrmesg("psession failed: ", 0, NULL);
break;
}
if(pwarn) pwarnmesg("WARNING: ",0,NULL);
/* Print response */
while(req->inpkt) {
printf("%s",req->inpkt->text);
req->inpkt = req->inpkt->next;
}
ardp_rqfree(req);
}
}
else if (zflag) {
if (delete_passwd_frm_entries(dirhst, princ_list))
fprintf(stderr,
"Could not delete password from entry!\n");
}
else if (dflag) {
if (!princ_list) {
fprintf(stderr, "ERROR: No principals specified!\n");
usage();
}
for (princp = princ_list; princp; princp = princp->next)
if (delete_ppw_entry(dirhst, princp->token)) {
fprintf(stderr, "Could not delete entry!\n");
break;
}
}
else {
if (!dirhst)
dirhst = stcopy("*");
if (!princ_list) {
/* Prompt for passwords for all instances of PRINCIPAL */
/* attribute of VS-DESCRIPTION and for all entries without */
/* passwords in the password file */
princ_list = get_vsdesc_principals();
if (read_and_set_password(dirhst, princ_list))
fprintf(stderr, "Could not set password!\n");
else
set_princ_with_no_passwd(princ_list);
}
else
if (read_and_set_password(dirhst, princ_list))
fprintf(stderr, "Could not set password!\n");
}
tklfree(princ_list);
if (dirhst)
stfree(dirhst);
return 0;
#endif
}
/* write entry into user's password file using information supplied
* if entry already exists for specified host and principal, the old
* password is overwritten woth the new one.
*/
static int write_ppw_to_file(char *hostname, char *principal, char *password)
{
char in_line[255], out_line[255];
static char *server = NULL, *princ_name = NULL, *passwd = NULL;
char *hname = stcopy(hostname);
long pos;
int num;
char *psession_filename = get_psession_filename();
FILE *psession_fp;
char *ppw_encode();
/* canonicalize host if not wildcarded */
if (!(hname = canonicalize(hname)))
RETURNPFAILURE;
if (!(psession_fp = fopen(psession_filename, "r+"))) {
/* cannot open password file, so create */
if (!(psession_fp = fopen(psession_filename, "w+"))) {
if (pfs_debug)
fprintf(stderr, "cannot create file %s\n",
psession_filename);
RETURNPFAILURE;
}
if (chmod(psession_filename, 0600)) {
if (pfs_debug)
perror("could not change permissions of passwd file");
RETURNPFAILURE;
}
fprintf(psession_fp, "# Prospero client session file.\n\n");
fprintf(psession_fp, "AUTHENTICATE * UNAUTHENTICATED ''\n");
fseek(psession_fp, 0L, 1); /* to allow input after output */
}
/* check if entry exists for principal */
while (pos = ftell(psession_fp), /* remember position of line */
fgets(in_line, sizeof(in_line), psession_fp)) {
num = qsscanf(in_line, "AUTHENTICATE %'&s P_PASSWORD %'&s %'&s\n",
&server, &princ_name, &passwd);
if (num < 3)
continue;
if (strequal(hname, server) &&
strequal(principal, princ_name)) {
/* entry found; set file pointer to overwrite */
fseek(psession_fp, pos, 0);
break;
}
}
qsprintf(out_line, sizeof(out_line),
"AUTHENTICATE %'s P_PASSWORD %'s %'s\n",
hname, principal, ppw_encode(password));
if (feof(psession_fp) || strlen(in_line) == strlen(out_line))
fputs(out_line, psession_fp);
else {
/* cannot insert space; have to create new file */
FILE *tmp_fp;
int newpos, uid = getuid();
char tmp_filename[255];
char line[255];
qsprintf(tmp_filename, sizeof(tmp_filename), "%s_tmp",
psession_filename);
if (!(tmp_fp = fopen(tmp_filename, "w"))) {
if (pfs_debug)
fprintf(stderr, "cannot create temporary file %s\n",
tmp_filename);
RETURNPFAILURE;
}
rewind(psession_fp);
while (newpos = ftell(psession_fp),
fgets(line, sizeof(line), psession_fp)
&& (newpos < pos))
fputs(line, tmp_fp);
fputs(out_line, tmp_fp);
while(fgets(line, sizeof(line), psession_fp))
fputs(line, tmp_fp);
(void) fclose(tmp_fp);
(void) fclose(psession_fp);
if (rename(tmp_filename, psession_filename)) {
unlink(tmp_filename);
if (pfs_debug)
perror("could not overwrite password file");
RETURNPFAILURE;
}
if (chmod(psession_filename, 0600)) {
if (pfs_debug)
perror("could not change permissions of passwd file");
RETURNPFAILURE;
}
stfree(hname);
return PSUCCESS;
}
stfree(hname);
(void) fclose(psession_fp);
return PSUCCESS;
}
/* deletes entry for hostname and principal specified from user's */
/* password file. */
/* if hostname is null, all entries for the principal are deleted. */
static int delete_ppw_entry(char *hostname, char *principal)
{
char line[255];
static char *server = NULL, *princ_name = NULL, *passwd = NULL;
char *hname = stcopy(hostname);
char tmp_filename[255];
int num;
char *psession_filename = get_psession_filename();
FILE *psession_fp, *tmp_fp;
if (!principal)
RETURNPFAILURE;
/* canonicalize host if not wildcarded */
if (hname)
hname = canonicalize(hname);
if (!(psession_fp = fopen(psession_filename, "r"))) {
fprintf(stderr, "could not open password file: %s\n",
psession_filename);
RETURNPFAILURE;
}
qsprintf(tmp_filename, sizeof(tmp_filename), "%s_tmp", psession_filename);
if (!(tmp_fp = fopen(tmp_filename, "w"))) {
if (pfs_debug)
perror("could not create temporary file");
RETURNPFAILURE;
}
while (fgets(line, sizeof(line), psession_fp)) {
num = qsscanf(line, "AUTHENTICATE %'&s P_PASSWORD %'&s %'&s\n",
&server, &princ_name, &passwd);
if (num < 3) {
fputs(line, tmp_fp);
continue;
}
if (hname && strcmp(hname, server) ||
strcmp(princ_name, principal))
fputs(line, tmp_fp);
}
(void) fclose(tmp_fp);
(void) fclose(psession_fp);
if (rename(tmp_filename, psession_filename)) {
unlink(tmp_filename);
if (pfs_debug)
perror("could not overwrite password file");
RETURNPFAILURE;
}
if (chmod(psession_filename, 0600)) {
if (pfs_debug)
perror("could not change permissions of passwd file");
RETURNPFAILURE;
}
stfree(hname);
return PSUCCESS;
}
/* read password and writes entry to file for principals in princ_list */
static int read_and_set_password(char *dirhst, TOKEN princ_list)
{
TOKEN princp;
char prompt[255], passwd[255];
for (princp = princ_list; princp; princp = princp->next) {
if(strequal(dirhst,"*"))
qsprintf(prompt, sizeof(prompt), "Password for %s", princp->token);
else qsprintf(prompt, sizeof(prompt), "Password for %s on host %s",
princp->token, dirhst);
read_password(prompt, passwd, sizeof(passwd));
if (passwd[0] == '\0') {
printf("Password not set!\n");
continue;
}
if (write_ppw_to_file(dirhst, princp->token, passwd))
RETURNPFAILURE;
}
return PSUCCESS;
}
/* adds to princ_list, principals from the password file that do not */
/* have any passwords, and that are not already in princ_list. */
static int set_princ_with_no_passwd()
{
char line[255], buf[255], prompt[255];
static char *server = NULL, *princ_name = NULL, *passwd = NULL;
char *psession_filename = get_psession_filename();
char tmp_filename[255];
FILE *psession_fp, *tmp_fp;
int num;
unsigned long hostaddr;
char *hostname = NULL;
struct hostent *host;
char *ppw_encode();
if (!(psession_fp = fopen(psession_filename, "r"))) {
if (pfs_debug)
fprintf(stderr, "could not open password file: %s\n",
psession_filename);
RETURNPFAILURE;
}
qsprintf(tmp_filename, sizeof(tmp_filename), "%s_tmp", psession_filename);
if (!(tmp_fp = fopen(tmp_filename, "w"))) {
if (pfs_debug)
perror("could not create temporary file");
RETURNPFAILURE;
}
while (fgets(line, sizeof(line), psession_fp)) {
num = qsscanf(line, "AUTHENTICATE %'&s P_PASSWORD %'&s %'&s\n",
&server, &princ_name, &passwd);
if (num < 3) {
fputs(line, tmp_fp);
continue;
}
if (num == 2) { /* no password */
if (isdigit(server[0])) {
hostname = addr_to_name(server);
}
else
hostname = stcopyr(server,hostname);
if(strequal(hostname,"*"))
qsprintf(prompt, sizeof(prompt),
"Password for %s", princ_name);
else
qsprintf(prompt, sizeof(prompt),
"Password for %s on host %s",
princ_name, hostname);
stfree(hostname);
read_password(prompt, buf, sizeof(buf));
qfprintf(tmp_fp, "AUTHENTICATE %'s P_PASSWORD %'s %'s\n",
server, princ_name, ppw_encode(buf));
}
else
fputs(line, tmp_fp);
}
(void) fclose(psession_fp);
(void) fclose(tmp_fp);
if (rename(tmp_filename, psession_filename)) {
unlink(tmp_filename);
if (pfs_debug)
perror("could not overwrite password file");
RETURNPFAILURE;
}
if (chmod(psession_filename, 0600)) {
if (pfs_debug)
perror("could not change permissions of passwd file");
RETURNPFAILURE;
}
return PSUCCESS;
}
/* deletes just the password from the entries specified. */
/* if princ_list is null, then passwords are removed for all principal */
/* entries with the specified host. if dirhst is null, then entries */
/* are removed for all principals. */
static int delete_passwd_frm_entries(char *dirhst, TOKEN princ_list)
{
char line[255], buf[255], prompt[255];
static char *server = NULL, *princ_name = NULL, *passwd = NULL;
char *psession_filename = get_psession_filename();
char tmp_filename[255];
int num;
FILE *psession_fp, *tmp_fp;
char *hname = NULL;
if (dirhst)
if (!(hname = canonicalize(dirhst)))
RETURNPFAILURE;
if (!(psession_fp = fopen(psession_filename, "r"))) {
if (pfs_debug)
fprintf(stderr, "could not open password file: %s\n",
psession_filename);
RETURNPFAILURE;
}
qsprintf(tmp_filename, sizeof(tmp_filename), "%s_tmp", psession_filename);
if (!(tmp_fp = fopen(tmp_filename, "w"))) {
if (pfs_debug)
perror("could not create temporary file");
RETURNPFAILURE;
}
while (fgets(line, sizeof(line), psession_fp)) {
num = qsscanf(line, "AUTHENTICATE %'&s P_PASSWORD %'&s %'&s\n",
&server, &princ_name, &passwd);
if (num < 3) {
fputs(line, tmp_fp);
continue;
}
if ((!hname || strequal(hname, server)) &&
(!princ_list || member(princ_name, princ_list))) {
passwd[0] = '\0';
qfprintf(tmp_fp, "AUTHENTICATE %'s P_PASSWORD %'s %'s\n",
server, princ_name, passwd);
}
else
fputs(line, tmp_fp);
}
(void) fclose(psession_fp);
(void) fclose(tmp_fp);
if (rename(tmp_filename, psession_filename)) {
unlink(tmp_filename);
if (pfs_debug)
perror("could not overwrite password file");
RETURNPFAILURE;
}
if (chmod(psession_filename, 0600)) {
if (pfs_debug)
perror("could not change permissions of passwd file");
RETURNPFAILURE;
}
return PSUCCESS;
}
/* this may be put into lib/pfs.
* gets a vlink structure for the vs_description file.
*/
static VLINK p_get_vsdesc()
{
VLINK vl = vlalloc();
if (!pget_dfile()) {
if (pfs_debug)
fprintf(stderr,
"could not get value of env. var. vsdesc_file\n");
return NULL;
}
if (!pget_dhost()) {
if (pfs_debug)
fprintf(stderr,
"could not get value of env. var. vsdesc_host\n");
return NULL;
}
vl->hsoname = stcopyr(pget_dfile(), vl->hsoname);
vl->host = stcopyr(pget_dhost(), vl->host);
return vl;
}
/* gets the value of the principal attribute of the vs-description */
static TOKEN get_vsdesc_principals()
{
VLINK vsdesc_vl;
PATTRIB attrs;
TOKEN princ_list = NULL;
if (!(vsdesc_vl = p_get_vsdesc()))
return NULL;
if (!(attrs = pget_at(vsdesc_vl, "PRINCIPAL")))
return NULL;
for (; attrs; attrs = attrs->next)
princ_list = tkappend(attrs->value.sequence->next->token,
princ_list);
return princ_list;
}
/* goes sequentially through file, and when principal is a member of */
/* princ_list *and* the hostname is specific, asks user if passwd to */
/* be set for this host. if yes, returns hostname, else repeats with */
/* next matching entry. */
static char *get_host_from_user(TOKEN princ_list)
{
char *dirhst;
FILE *psession_fp;
char *psession_filename = get_psession_filename();
char line[255], ans[255];
static char *server = NULL, *princ_name = NULL, *passwd = NULL;
char *hostname = NULL;
int num;
if (!(psession_fp = fopen(psession_filename, "r+"))) {
if (pfs_debug)
fprintf(stderr, "could not open password file\n");
return NULL;
}
while (fgets(line, sizeof(line), psession_fp)) {
num = qsscanf(line, "AUTHENTICATE %'&s P_PASSWORD %'&s %'&s\n",
&server, &princ_name, &passwd);
if (num < 3)
continue;
if (member(princ_name, princ_list) &&
isdigit(server[0])) {
hostname = addr_to_name(server);
printf("set password on host %s? (y/n): ",
hostname);
gets(ans);
if (strequal(ans, "y"))
return (hostname);
}
}
return NULL;
}
static char *addr_to_name(char *addr)
{
unsigned long hostaddr;
struct hostent *host;
char *hostname = NULL;
hostaddr = inet_addr(addr);
host = gethostbyaddr((char *)&hostaddr,
sizeof(hostaddr), AF_INET);
if(host)
hostname = stcopy(host->h_name);
else
hostname = stcopy(addr);
return hostname;
}
struct amounts {
char *currency;
char *prompt_amt;
char *max_amt;
struct amounts *next;
};
static int account(int argc, char *argv[])
{
char *acc_method = NULL, *server = NULL, *acc_server= NULL;
char *account = NULL, *verifier = NULL, *int_bill_ref = NULL;
struct amounts *amt_list = NULL, *curr_amt, *last_amt = NULL;
char *prompt_and_get();
if (argc > 0) {
if (argv[0][1] != '-')
acc_method = stcopy(argv[0]);
argc--, argv++;
while (argc > 0 && **argv == '-') {
if (strequal(argv[0], "-server")) {
server = stcopy(argv[1]);
argc-=2, argv+=2;
}
else if (strequal(argv[0], "-acc_server")) {
acc_server = stcopy(argv[1]);
argc-=2, argv+=2;
}
else if (strequal(argv[0], "-account")) {
account = stcopy(argv[1]);
argc-=2, argv+=2;
}
else if (strequal(argv[0], "-verifier")) {
verifier = stcopy(argv[1]);
argc-=2, argv+=2;
}
else if (strequal(argv[0], "-int_bill_ref")) {
int_bill_ref = stcopy(argv[1]);
argc-=2, argv+=2;
}
else if (strequal(argv[0], "-currency")) {
curr_amt = (struct amounts *) stalloc(sizeof(struct
amounts));
curr_amt->currency = stcopy(argv[1]);
curr_amt->prompt_amt = stcopy(argv[2]);
curr_amt->max_amt = stcopy(argv[3]);
curr_amt->next = NULL;
if (amt_list == NULL)
amt_list = curr_amt;
else
last_amt->next = curr_amt;
last_amt = curr_amt;
argc -=4, argv+=4;
}
else
usage();
}
if (argc > 0)
usage();
}
if (!acc_method)
acc_method = prompt_and_get("Accounting method");
if (!server)
server = prompt_and_get("Server");
if (!acc_server)
acc_server = prompt_and_get("Accounting server");
if (!account)
account = prompt_and_get("Account name");
if (!verifier) {
verifier = (char *) stalloc(255);
read_password("Verifier", verifier, p__bstsize(verifier));
}
if (!int_bill_ref)
int_bill_ref = prompt_and_get("Internal billing reference");
if (!amt_list) {
while (1){
curr_amt = (struct amounts *) stalloc(sizeof(struct
amounts));
curr_amt->currency = prompt_and_get("Currency");
if (curr_amt->currency[0] == '\0') {
stfree(curr_amt);
break;
}
curr_amt->prompt_amt = prompt_and_get("Prompt amount");
curr_amt->max_amt = prompt_and_get("Max amount");
curr_amt->next = NULL;
if (amt_list == NULL)
amt_list = curr_amt;
else
last_amt->next = curr_amt;
last_amt = curr_amt;
};
}
if (amt_list == NULL) {
fprintf(stderr,
"ERROR: Amounts must be specified in atleast one currency!\n");
exit(1);
}
/* Write to file */
write_acc_to_file(server, acc_method, acc_server, account,
verifier, int_bill_ref, amt_list);
/* Free allocated strings */
stfree(server);
stfree(acc_method);
stfree(acc_server);
stfree(account);
stfree(verifier);
stfree(int_bill_ref);
while (amt_list) {
stfree(amt_list->currency);
stfree(amt_list->prompt_amt);
stfree(amt_list->max_amt);
amt_list = amt_list->next;
}
return PSUCCESS;
}
static int write_acc_to_file(char *server, char *acc_method,
char *acc_server, char *account,
char *verifier, char *int_bill_ref,
struct amounts *amt_list)
{
char in_line[255], out_line[255];
static char *hostname = NULL;
struct amounts *amtp;
char *hname = stcopy(server);
long pos;
int num;
char *psession_filename = get_psession_filename();
FILE *psession_fp;
char *ppw_encode();
/* canonicalize host if not wildcarded */
if (!(hname = canonicalize(hname)))
RETURNPFAILURE;
if (!(psession_fp = fopen(psession_filename, "r+"))) {
/* cannot open password file, so create */
if (!(psession_fp = fopen(psession_filename, "w+"))) {
if (pfs_debug)
fprintf(stderr, "cannot create file %s\n",
psession_filename);
RETURNPFAILURE;
}
if (chmod(psession_filename, 0600)) {
if (pfs_debug)
perror("could not change permissions of passwd file");
RETURNPFAILURE;
}
fprintf(psession_fp, "# Prospero client session file.\n\n");
fprintf(psession_fp, "AUTHENTICATE * UNAUTHENTICATED ''\n");
fseek(psession_fp, 0L, 1); /* to allow input after output */
}
/* check if entry exists for principal */
while (pos = ftell(psession_fp), /* remember position of line */
fgets(in_line, sizeof(in_line), psession_fp)) {
num = qsscanf(in_line, "ACCOUNT %'&s",
&hostname);
if (num < 1)
continue;
if (strequal(hname, hostname)) {
/* entry found; set file pointer to overwrite */
fseek(psession_fp, pos, 0);
break;
}
}
qsprintf(out_line, sizeof(out_line),
"ACCOUNT %'s %'s %'s %'s %'s %'s\n",
hname, acc_method, acc_server, account,
ppw_encode(verifier), int_bill_ref);
if (feof(psession_fp)) {
fputs(out_line, psession_fp);
for (amtp = amt_list; amtp; amtp = amtp->next)
qfprintf(psession_fp, "CURRENCY %'s %'s %'s\n",
amtp->currency, amtp->prompt_amt, amtp->max_amt);
}
else {
/* cannot insert space; have to create new file */
FILE *tmp_fp;
int newpos, uid = getuid();
char tmp_filename[255];
char line[255];
qsprintf(tmp_filename, sizeof(tmp_filename), "%s_tmp",
psession_filename);
if (!(tmp_fp = fopen(tmp_filename, "w"))) {
if (pfs_debug)
fprintf(stderr, "cannot create temporary file %s\n",
tmp_filename);
RETURNPFAILURE;
}
rewind(psession_fp);
while (newpos = ftell(psession_fp),
fgets(line, sizeof(line), psession_fp)
&& (newpos < pos))
fputs(line, tmp_fp);
fputs(out_line, tmp_fp);
for (amtp = amt_list; amtp; amtp = amtp->next)
qfprintf(tmp_fp, "CURRENCY %'s %'s %'s\n",
amtp->currency, amtp->prompt_amt, amtp->max_amt);
while(fgets(line, sizeof(line), psession_fp),
strnequal(line, "CURRENCY", strlen("CURRENCY")));
fputs(line, tmp_fp);
while(fgets(line, sizeof(line), psession_fp))
fputs(line, tmp_fp);
(void) fclose(tmp_fp);
(void) fclose(psession_fp);
if (rename(tmp_filename, psession_filename)) {
unlink(tmp_filename);
if (pfs_debug)
perror("could not overwrite password file");
RETURNPFAILURE;
}
if (chmod(psession_filename, 0600)) {
if (pfs_debug)
perror("could not change permissions of passwd file");
RETURNPFAILURE;
}
stfree(hname);
return PSUCCESS;
}
stfree(hname);
(void) fclose(psession_fp);
return PSUCCESS;
}
char *prompt_and_get(char *prompt)
{
char buf[255];
printf("%s: ", prompt);
gets(buf);
return(stcopy(buf));
}
/* Display command usage and exit. Needs to be updated. */
static int usage()
{
fprintf(stderr,
"Usage: psession [-delete] -authenticate P_PASSWORD\n");
fprintf(stderr,
" [-s [-m]] [-d] [-D[#]] [=N[#]]\n");
fprintf(stderr,
" [-p <principal>] [-p <principal>] .. [hostname]\n");
fprintf(stderr,
"OR: psession -p_password\n");
fprintf(stderr,
" [-s [-m]] [-d] [-D[#]] [-N[#]]\n");
fprintf(stderr,
" [-p <principal>] [-p <principal>] .. [hostname]\n");
fprintf(stderr,
"OR: ppw [-s [-m]] [-d] [-D[#]] [-N[#]]\n");
fprintf(stderr,
" [-p <principal>] [-p <principal>] .. [hostname]\n");
fprintf(stderr,
"OR: psession -account [<method>] [-server <server>]\n");
fprintf(stderr,
" [-acc_server <acc_server>] [-account <acc_name>]\n");
fprintf(stderr,
" [-verifier <verifier>] [-int_bill_ref <ibf>]\n");
fprintf(stderr,
" [-currency <currency> <prompt_amt> <max_amt>]\n");
fprintf(stderr,
"OR: psession -delete -authenticate <method> [-server <server>]\n");
fprintf(stderr,
"OR: psession -delete -account [-server <server>]\n");
fprintf(stderr,
"OR: psession -authenticate KERBEROS [-s <server>]\n");
fprintf(stderr,
" [-p <principal] [-f <ticket-file>]\n");
fprintf(stderr,
"OR: psession -zero\n");
exit(1);
}
static struct termios permmodes;
/* read user's password */
static int read_password(char *prompt, char *pwstr, int pwlen)
{
struct termios tempmodes;
int tmp;
if (prompt)
printf("%s: ", prompt);
else
printf("Password: ");
fflush(stdout);
if(tcgetattr(fileno(stdin), &permmodes)) return(errno);
bcopy(&permmodes,&tempmodes,sizeof(struct termios));
tempmodes.c_lflag &= ~(ECHO|ECHONL);
signal(SIGQUIT,abort_pwread);
signal(SIGINT,abort_pwread);
if(tcsetattr(fileno(stdin), TCSANOW, &tempmodes)) return(errno);
*pwstr = '\0';
fgets(pwstr, pwlen, stdin);
pwstr[strlen(pwstr)-1] = '\0';
printf("\n");
fflush(stdout);
if(tcsetattr(fileno(stdin), TCSANOW, &permmodes)) return(errno);
signal(SIGQUIT,abort_prog);
signal(SIGINT,abort_prog);
return(0);
}
static void abort_pwread()
{
tcsetattr(fileno(stdin), TCSANOW, &permmodes);
abort_prog();
}
static void abort_prog()
{
printf("aborted\n");
exit(0);
}
/* if the hostname is not wildcarded, returns the internet address as */
/* a dotted string. if wildcarded, the hostname is just converted to */
/* uppercase and returned.*/
static char *canonicalize(char *hostname)
{
struct hostent *host;
char *cp;
struct in_addr hostaddr;
if (!hostname)
return NULL;
/* check if wildcarded */
for (cp = hostname; *cp; ++cp)
if (*cp == '*') /* cannot cannicalize */
return uppercase(hostname);
/* look up server host */
assert(P_IS_THIS_THREAD_MASTER());
if ((host = gethostbyname(hostname)) == (struct hostent *) 0) {
if (pfs_debug)
fprintf(stderr, "canonicalize(): %s: unknown host\n", hostname);
return NULL;
}
bcopy(host->h_addr,&hostaddr,sizeof(hostaddr));
hostname = stcopyr(inet_ntoa(hostaddr), hostname);
return hostname;
}
/* convert a string to uppercase */
static char *
uppercase(char *str)
{
char *cp;
if (!str)
return NULL;
for (cp = str; *cp; cp++)
if (islower(*cp))
*cp = toupper(*cp);
return str;
}
int
add_krb_entry(int argc, char *argv[])
{
char *server = NULL, *principal = NULL, *tkt_file = NULL;
char in_line[255], out_line[255];
static char *hostname = NULL, *method = NULL;
long pos;
int num;
char *psession_filename = get_psession_filename();
FILE *psession_fp;
while (argc > 0 && **argv == '-') {
switch (*(argv[0]+1)) {
case 's':
if (server)
usage();
server = stcopy(argv[1]);
argc-=2, argv+=2;
break;
case 'p':
if (principal)
usage();
principal = stcopy(argv[1]);
argc-=2, argv+=2;
break;
case 'f':
if (tkt_file)
usage();
tkt_file = stcopy(argv[1]);
argc-=2, argv+=2;
break;
default:
usage();
}
}
if (!server)
server = prompt_and_get("Server");
if (!principal)
principal = prompt_and_get("Principal");
if (!tkt_file)
tkt_file = prompt_and_get("Ticket file");
/* canonicalize host if not wildcarded */
if (!(server = canonicalize(server)))
RETURNPFAILURE;
if (!(psession_fp = fopen(psession_filename, "r+"))) {
/* cannot open session file, so create */
if (!(psession_fp = fopen(psession_filename, "w+"))) {
if (pfs_debug)
fprintf(stderr, "cannot create file %s\n",
psession_filename);
RETURNPFAILURE;
}
if (chmod(psession_filename, 0600)) {
if (pfs_debug)
perror("could not change permissions of passwd file");
RETURNPFAILURE;
}
fprintf(psession_fp, "# Prospero client session file.\n\n");
fprintf(psession_fp, "AUTHENTICATE * UNAUTHENTICATED ''\n");
fseek(psession_fp, 0L, 1); /* to allow input after output */
}
/* check if entry exists for principal */
while (pos = ftell(psession_fp), /* remember position of line */
fgets(in_line, sizeof(in_line), psession_fp)) {
num = qsscanf(in_line, "AUTHENTICATE %'&s %'&s",
&hostname, &method);
if (num < 2 || strcmp(method, "KERBEROS"))
continue;
if (strequal(server, hostname)) {
/* entry found; set file pointer to overwrite */
fseek(psession_fp, pos, 0);
break;
}
}
qsprintf(out_line, sizeof(out_line),
"AUTHENTICATE %'s KERBEROS %'s %'s\n",
server, principal, tkt_file);
if (feof(psession_fp) || strlen(in_line) == strlen(out_line))
fputs(out_line, psession_fp);
else {
/* cannot insert space; have to create new file */
FILE *tmp_fp;
int newpos, uid = getuid();
char tmp_filename[255];
char line[255];
qsprintf(tmp_filename, sizeof(tmp_filename), "%s_tmp",
psession_filename);
if (!(tmp_fp = fopen(tmp_filename, "w"))) {
if (pfs_debug)
fprintf(stderr, "cannot create temporary file %s\n",
tmp_filename);
RETURNPFAILURE;
}
rewind(psession_fp);
while (newpos = ftell(psession_fp),
fgets(line, sizeof(line), psession_fp)
&& (newpos < pos))
fputs(line, tmp_fp);
fputs(out_line, tmp_fp);
while(fgets(line, sizeof(line), psession_fp))
fputs(line, tmp_fp);
(void) fclose(tmp_fp);
(void) fclose(psession_fp);
if (rename(tmp_filename, psession_filename)) {
unlink(tmp_filename);
if (pfs_debug)
perror("could not overwrite session file");
RETURNPFAILURE;
}
if (chmod(psession_filename, 0600)) {
if (pfs_debug)
perror("could not change permissions of passwd file");
RETURNPFAILURE;
}
stfree(server);
return PSUCCESS;
}
stfree(server);
(void) fclose(psession_fp);
return PSUCCESS;
}
int
del_krb_entry(int argc, char *argv[])
{
char *server = NULL;
char line[255], *hostname = NULL, *method = NULL;
char tmp_filename[255];
int num;
char *psession_filename = get_psession_filename();
FILE *psession_fp, *tmp_fp;
if (argc > 1 && strequal(argv[0], "-server")) {
server = stcopy(argv[1]);
/* canonicalize host if not wildcarded */
if (!(server = canonicalize(server)))
RETURNPFAILURE;
}
if (!(psession_fp = fopen(psession_filename, "r"))) {
fprintf(stderr, "could not open session file: %s\n",
psession_filename);
RETURNPFAILURE;
}
qsprintf(tmp_filename, sizeof(tmp_filename), "%s_tmp", psession_filename);
if (!(tmp_fp = fopen(tmp_filename, "w"))) {
if (pfs_debug)
perror("could not create temporary file");
RETURNPFAILURE;
}
while (fgets(line, sizeof(line), psession_fp)) {
num = qsscanf(line, "AUTHENTICATE %'&s %'&s",
&hostname, &method);
if (num < 2 || strcmp(method, "KERBEROS") ||
(server && strcmp(server, hostname)))
fputs(line, tmp_fp);
}
(void) fclose(tmp_fp);
(void) fclose(psession_fp);
if (rename(tmp_filename, psession_filename)) {
unlink(tmp_filename);
if (pfs_debug)
perror("could not overwrite session file");
RETURNPFAILURE;
}
if (chmod(psession_filename, 0600)) {
if (pfs_debug)
perror("could not change permissions of passwd file");
RETURNPFAILURE;
}
return PSUCCESS;
}
int
del_unauth_entry(int argc, char *argv[])
{
char *server = NULL;
char line[255], *hostname = NULL, *method = NULL;
char tmp_filename[255];
int num;
char *psession_filename = get_psession_filename();
FILE *psession_fp, *tmp_fp;
if (argc > 1 && strequal(argv[0], "-server")) {
server = stcopy(argv[1]);
/* canonicalize host if not wildcarded */
if (!(server = canonicalize(server)))
RETURNPFAILURE;
}
if (!(psession_fp = fopen(psession_filename, "r"))) {
fprintf(stderr, "could not open session file: %s\n",
psession_filename);
RETURNPFAILURE;
}
qsprintf(tmp_filename, sizeof(tmp_filename), "%s_tmp", psession_filename);
if (!(tmp_fp = fopen(tmp_filename, "w"))) {
if (pfs_debug)
perror("could not create temporary file");
RETURNPFAILURE;
}
while (fgets(line, sizeof(line), psession_fp)) {
num = qsscanf(line, "AUTHENTICATE %'&s %'&s",
&hostname, &method);
if (num < 2 || strcmp(method, "UNAUTHENTICATED") ||
(server && strcmp(server, hostname)))
fputs(line, tmp_fp);
}
(void) fclose(tmp_fp);
(void) fclose(psession_fp);
if (rename(tmp_filename, psession_filename)) {
unlink(tmp_filename);
if (pfs_debug)
perror("could not overwrite session file");
RETURNPFAILURE;
}
if (chmod(psession_filename, 0600)) {
if (pfs_debug)
perror("could not change permissions of passwd file");
RETURNPFAILURE;
}
return PSUCCESS;
}
int
del_acc_entry(int argc, char *argv[])
{
char *server = NULL;
char line[255], *hostname = NULL;
char tmp_filename[255];
int num, deleting = 0;
char *psession_filename = get_psession_filename();
FILE *psession_fp, *tmp_fp;
if (argc > 1 && strequal(argv[0], "-server")) {
server = stcopy(argv[1]);
/* canonicalize host if not wildcarded */
if (!(server = canonicalize(server)))
RETURNPFAILURE;
}
if (!(psession_fp = fopen(psession_filename, "r"))) {
fprintf(stderr, "could not open session file: %s\n",
psession_filename);
RETURNPFAILURE;
}
qsprintf(tmp_filename, sizeof(tmp_filename),
"%s_tmp", psession_filename);
if (!(tmp_fp = fopen(tmp_filename, "w"))) {
if (pfs_debug)
perror("could not create temporary file");
RETURNPFAILURE;
}
while (fgets(line, sizeof(line), psession_fp)) {
if (deleting) {
if (strnequal(line, "CURRENCY", strlen("CURRENCY")))
continue;
else
deleting = 0;
}
num = qsscanf(line, "ACCOUNT %'&s",
&hostname);
if (num < 1 || (server && strcmp(server, hostname)))
fputs(line, tmp_fp);
else /* Delete */
deleting = 1;
}
(void) fclose(tmp_fp);
(void) fclose(psession_fp);
if (rename(tmp_filename, psession_filename)) {
unlink(tmp_filename);
if (pfs_debug)
perror("could not overwrite session file");
RETURNPFAILURE;
}
if (chmod(psession_filename, 0600)) {
if (pfs_debug)
perror("could not change permissions of passwd file");
RETURNPFAILURE;
}
return PSUCCESS;
}
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