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/*
* decode_oracle.c
*
* Oracle SQL*Net v2/Net8.
*
* Copyright (c) 2000 Dug Song <dugsong@monkey.org>
*
* $Id: decode_oracle.c,v 1.6 2001/03/15 08:33:01 dugsong Exp $
*/
#include "config.h"
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include "decode.h"
/* XXX - dag nasty. anyone have protocol specs? */
int
decode_oracle(u_char *buf, int len, u_char *obuf, int olen)
{
u_char *p, *q;
u_short i, j;
int gotauth = 0;
p = buf;
i = pntohs(p);
if (i >= len) return (0);
if (i < 60) { /* XXX - skip unknown "empty" packet */
p += i;
i = pntohs(p);
if (p + i > buf + len) return (0);
}
/* Save TNS connect string. */
p[i] = '\0';
for (q = p + i; q > p && q[-1] != '\0'; q--)
;
snprintf(obuf, olen, "%s\n", q);
p += i;
/* XXX - skip initial username message. */
if ((p = bufbuf(p, len, "(TNS V", 6)) == NULL) return (0);
if ((i = len - (p - buf)) <= 0) return (0);
if ((p = memchr(p, ')', i)) == NULL) return (0);
/* Parse auth messages. */
for (p++; p - buf < len; p += i) {
i = pntohs(p);
if (p + i > buf + len || i < 120)
break;
if (memcmp(p + 4, "\x06\x00\x00\x00\x00\x00\x03\x3a", 8) != 0)
continue;
for (q = p + i; q > p && q[-1] != '\0'; q--)
;
j = pntohs(p + 19);
if (q + j > buf + len)
return (0);
q[j] = '\0';
j = strlen(obuf);
snprintf(obuf + j, olen + j, "%s\n", p + 117);
gotauth++;
}
return (gotauth ? strlen(obuf) : 0);
}
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