#include <stdio.h>
#include <gdb.h>
#include <ctype.h>
+#include <string.h>
#include <sys/param.h>
#include <sys/file.h>
+#include <fcntl.h>
+#include <des.h>
+#include <krb.h>
#include <moira.h>
#include "update.h"
extern int code, errno, uid;
extern int have_authorization, have_file, done;
+extern C_Block session;
+static des_key_schedule sched;
+static des_cblock ivec;
int get_block();
*/
int
-get_file(pathname, file_size, checksum, mode)
+get_file(pathname, file_size, checksum, mode, encrypt)
char *pathname;
int file_size;
int checksum;
int mode;
+ int encrypt;
{
int fd, n_written;
int found_checksum;
}
if (done) /* re-initialize data */
initialize();
+#ifdef POSIX
+ if (setuid(uid) < 0) {
+#else
if (setreuid(0, uid) < 0) {
+#endif
com_err(whoami, errno, "Unable to setuid to %d\n", uid);
exit(1);
}
lseek(fd, 0, L_SET);
if (send_ok())
lose("sending okay for file transfer (get_file)");
+ if (encrypt) {
+#ifdef DEBUG
+ com_err(whoami, 0, "Session %02x %02x %02x %02x %02x %02x %02x %02x",
+ session[0], session[1], session[2], session[3],
+ session[4], session[5], session[6], session[7]);
+#endif /* DEBUG */
+ des_key_sched(session, sched);
+ memcpy(ivec, session, sizeof(ivec));
+ }
n_written = 0;
while (n_written < file_size && code == 0) {
- int n_got = get_block(fd, file_size - n_written);
+ int n_got = get_block(fd, file_size - n_written, encrypt);
if (n_got == -1) {
/* get_block has already printed a message */
unlink(pathname);
}
static int
-get_block(fd, max_size)
+get_block(fd, max_size, encrypt)
int fd;
int max_size;
+ int encrypt;
{
STRING data;
- int n_read, n;
+ unsigned char dst[UPDATE_BUFSIZ + 8], *src;
+ int n_read, n, i;
code = receive_object(conn, (char *)&data, STRING_T);
if (code) {
code = connection_errno(conn);
lose("receiving data file (get_file)");
}
+
+ if (encrypt) {
+ src = (unsigned char *)STRING_DATA(data);
+ n = MAX_STRING_SIZE(data);
+ des_pcbc_encrypt(src, dst, n, sched, ivec, 1);
+ for (i = 0; i < 8; i++)
+ ivec[i] = src[n - 8 + i] ^ dst[n - 8 + i];
+ memcpy(STRING_DATA(data), dst, n);
+ }
+
n_read = MIN(MAX_STRING_SIZE(data), max_size);
n = 0;
while (n < n_read) {