/** Copy all the data from an \c ibuf to an \c obuf. */
int iobuf_copy(ibuf* in, obuf* out)
{
if (ibuf_eof(in)) return 1;
if (ibuf_error(in) || obuf_error(out)) return 0;
for (;;) {
if (!obuf_write_large(out,
in->io.buffer+in->io.bufstart,
in->io.buflen-in->io.bufstart))
return 0;
in->io.bufstart = in->io.buflen;
if (!ibuf_refill(in))
return ibuf_eof(in);
}
}
static int starttls(void)
{
int fd;
char *fdstr;
int extrachars = 0;
char c;
/* STARTTLS must be the last command in a pipeline, otherwise we can
* create a security risk (see CVE-2011-0411). Close input and
* check for any extra pipelined commands, so we can give an error
* message. Note that this will cause an error on the filehandle,
* since we have closed it. */
close(0);
while (!ibuf_eof(&inbuf) && !ibuf_error(&inbuf)) {
if (ibuf_getc(&inbuf, &c))
++extrachars;
}
if (!(fdstr=getenv("SSLCTLFD")))
return 0;
if ((fd = atoi(fdstr)) <= 0)
return 0;
if (write(fd, "y", 1) < 1)
return 0;
if (!(fdstr=getenv("SSLREADFD")))
return 0;
if ((fd = atoi(fdstr)) <= 0)
return 0;
if (dup2(fd, 0) != 0)
return 0;
if (!(fdstr=getenv("SSLWRITEFD")))
return 0;
if ((fd = atoi(fdstr)) <= 0)
return 0;
if (dup2(fd, 1) != 1)
return 0;
/* Re-initialize stdin and clear input buffer */
ibuf_init(&inbuf,0,0,IOBUF_NEEDSCLOSE, 4096);
if (extrachars)
respond(&resp_earlytalker);
return 1;
}
/** Read a line from the \c ibuf into a dynamic string. */
int ibuf_getstr(ibuf* in, struct str* s, char boundary)
{
iobuf* io;
int ch;
io = &in->io;
in->count = 0;
str_truncate(s, 0);
if (ibuf_eof(in) || ibuf_error(in) || ibuf_timedout(in)) return 0;
for (;;) {
if (io->bufstart >= io->buflen && !ibuf_refill(in)) {
if (ibuf_eof(in)) break;
return 0;
}
in->count++;
ch = io->buffer[io->bufstart++];
if (!str_catc(s, ch)) return 0;
if (ch == boundary) break;
}
return in->count > 0;
}
