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/*
* Encryption utilites
* Bradley Williams
* {allegra,ihnp4,uiucdcs,ctvax}!convex!williams
* $Revision: 7.16 $
*/
#if !defined(VMS) && !defined(MSDOS) && defined(CRYPT_PATH)
#include <curses.h>
#if defined(BSD42) || defined(BSD43)
#include <sys/types.h>
#include <sys/file.h>
#else
#include <fcntl.h>
#endif
#include "sc.h"
char *getpass();
int Crypt = 0;
#define MAXKEYWORDSIZE 30
char KeyWord[MAXKEYWORDSIZE] = {""};
void
creadfile(char *save, int eraseflg)
{
register FILE *f;
int pipefd[2];
int fildes;
int pid;
if (eraseflg && strcmp(save, curfile) && modcheck(" first")) return;
if ((fildes = open(findhome(save), O_RDONLY, 0)) < 0) {
error ("Can't read file \"%s\"", save);
return;
}
if (eraseflg) erasedb();
if (pipe(pipefd) < 0) {
error("Can't make pipe to child");
return;
}
deraw(1);
(void) strcpy(KeyWord, getpass("Enter key:"));
goraw();
if ((pid=fork()) == 0) { /* if child */
(void) close(0); /* close stdin */
(void) close(1); /* close stdout */
(void) close(pipefd[0]); /* close pipe input */
(void) dup(fildes); /* standard in from file */
(void) dup(pipefd[1]); /* connect to pipe */
(void) fprintf(stderr, " ");
(void) execl(CRYPT_PATH, "crypt", KeyWord, 0);
(void) fprintf(stderr, "execl(%s, \"crypt\", %s, 0) in creadfile() failed",
CRYPT_PATH, KeyWord);
exit(-127);
} else { /* else parent */
(void) close(fildes);
(void) close(pipefd[1]); /* close pipe output */
if ((f = fdopen(pipefd[0], "r")) == (FILE *)0) {
(void) kill(pid, 9);
error("Can't fdopen file \"%s\"", save);
(void)close(pipefd[0]);
return;
}
}
loading++;
while (fgets(line, sizeof(line), f)) {
linelim = 0;
if (line[0] != '#') (void) yyparse();
}
--loading;
(void) fclose(f);
(void) close(pipefd[0]);
while (pid != wait(&fildes)) /**/;
linelim = -1;
if (eraseflg) {
(void) strcpy(curfile, save);
modflg = 0;
}
}
int
cwritefile(char *fname, int r0, int c0, int rn, int cn)
{
register FILE *f;
int pipefd[2];
int fildes;
int pid;
char save[PATHLEN];
char *fn;
char *busave;
if (*fname == '\0') fname = &curfile[0];
fn = fname;
while (*fn && (*fn == ' ')) /* Skip leading blanks */
fn++;
if (*fn == '|') {
error("Can't have encrypted pipe");
return (-1);
}
(void) strcpy(save, fname);
busave = findhome(save);
#ifdef DOBACKUPS
if (!backup_file(busave) &&
(yn_ask("Could not create backup copy, Save anyway?: (y,n)") != 1))
return (0);
#endif
if ((fildes = open (busave, O_TRUNC|O_WRONLY|O_CREAT, 0600)) < 0) {
error("Can't create file \"%s\"", save);
return (-1);
}
if (pipe(pipefd) < 0) {
error("Can't make pipe to child\n");
return (-1);
}
if (KeyWord[0] == '\0') {
deraw(1);
(void) strcpy(KeyWord, getpass("Enter key:"));
goraw();
}
if ((pid=fork()) == 0) { /* if child */
(void) close(0); /* close stdin */
(void) close(1); /* close stdout */
(void) close(pipefd[1]); /* close pipe output */
(void) dup(pipefd[0]); /* connect to pipe input */
(void) dup(fildes); /* standard out to file */
(void) fprintf(stderr, " ");
(void) execl(CRYPT_PATH, "crypt", KeyWord, 0);
(void) fprintf(stderr, "execl(%s, \"crypt\", %s, 0) in cwritefile() failed",
CRYPT_PATH, KeyWord);
exit (-127);
}
else { /* else parent */
(void) close(fildes);
(void) close(pipefd[0]); /* close pipe input */
f = fdopen(pipefd[1], "w");
if (f == 0) {
(void) kill(pid, -9);
error("Can't fdopen file \"%s\"", save);
(void) close(pipefd[1]);
return (-1);
}
}
write_fd(f, r0, c0, rn, cn);
(void) fclose(f);
(void) close(pipefd[1]);
while (pid != wait(&fildes)) /**/;
(void) strcpy(curfile,save);
modflg = 0;
error("File \"%s\" written (encrypted).", curfile);
return (0);
}
#endif /* CRYPT_PATH */
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