+++ /dev/null
-/*
- * Copyright (c) 1995-2003, Index Data
- * See the file LICENSE for details.
- * Sebastian Hammer, Adam Dickmeiss
- *
- * $Id: ber_tag.c,v 1.27 2003-05-24 19:20:14 adam Exp $
- */
-#if HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <stdio.h>
-#include "odr-priv.h"
-
-/* ber_tag
- * On encoding:
- * if p: write tag. return 1 (success) or -1 (error).
- * if !p: return 0.
- * On decoding:
- * if tag && zclass match up, advance pointer and return 1. set cons.
- * else leave pointer unchanged. Return 0.
- *
- * Should perhaps be odr_tag?
- */
-int ber_tag(ODR o, void *p, int zclass, int tag, int *constructed, int opt,
- const char *name)
-{
- struct Odr_ber_tag *odr_ber_tag = &o->op->odr_ber_tag;
- int rd;
- char **pp = (char **)p;
-
- if (o->direction == ODR_DECODE)
- *pp = 0;
- o->t_class = -1;
- if (o->op->stackp < 0)
- {
- odr_seek(o, ODR_S_SET, 0);
- o->top = 0;
- o->bp = o->buf;
- odr_ber_tag->lclass = -1;
- }
- switch (o->direction)
- {
- case ODR_ENCODE:
- if (!*pp)
- {
- if (!opt)
- {
- odr_seterror(o, OREQUIRED, 24);
- odr_setelement (o, name);
- }
- return 0;
- }
- if ((rd = ber_enctag(o, zclass, tag, *constructed)) < 0)
- return -1;
-#ifdef ODR_DEBUG
- fprintf(stderr, "\n[class=%d,tag=%d,cons=%d,stackp=%d]", zclass, tag,
- *constructed, o->stackp);
-#endif
- return 1;
-
- case ODR_DECODE:
- if (o->op->stackp > -1 && !odr_constructed_more(o))
- {
- if (!opt)
- {
- odr_seterror(o, OREQUIRED, 25);
- odr_setelement(o, name);
- }
- return 0;
- }
- if (odr_ber_tag->lclass < 0)
- {
- if ((odr_ber_tag->br =
- ber_dectag(o->bp, &odr_ber_tag->lclass,
- &odr_ber_tag->ltag, &odr_ber_tag->lcons,
- odr_max(o))) <= 0)
- {
- odr_seterror(o, OPROTO, 26);
- odr_setelement(o, name);
- return 0;
- }
-#ifdef ODR_DEBUG
- fprintf(stderr,
- "\n[class=%d,tag=%d,cons=%d,stackp=%d]",
- odr_ber_tag->lclass, odr_ber_tag->ltag,
- odr_ber_tag->lcons, o->stackp);
-#endif
- }
- if (zclass == odr_ber_tag->lclass && tag == odr_ber_tag->ltag)
- {
- o->bp += odr_ber_tag->br;
- *constructed = odr_ber_tag->lcons;
- odr_ber_tag->lclass = -1;
- return 1;
- }
- else
- {
- if (!opt)
- {
- odr_seterror(o, OREQUIRED, 27);
- odr_setelement(o, name);
- }
- return 0;
- }
- case ODR_PRINT:
- if (!*pp && !opt)
- {
- odr_seterror(o,OREQUIRED, 28);
- odr_setelement(o, name);
- }
- return *pp != 0;
- default:
- odr_seterror(o, OOTHER, 29);
- odr_setelement(o, name);
- return 0;
- }
-}
-
-/* ber_enctag
- * BER-encode a zclass/tag/constructed package (identifier octets). Return
- * number of bytes encoded, or -1 if out of bounds.
- */
-int ber_enctag(ODR o, int zclass, int tag, int constructed)
-{
- int cons = (constructed ? 1 : 0), n = 0;
- unsigned char octs[sizeof(int)], b;
-
- b = (zclass << 6) & 0XC0;
- b |= (cons << 5) & 0X20;
- if (tag <= 30)
- {
- b |= tag & 0X1F;
- if (odr_putc(o, b) < 0)
- return -1;
- return 1;
- }
- else
- {
- b |= 0X1F;
- if (odr_putc(o, b) < 0)
- return -1;
- do
- {
- octs[n++] = tag & 0X7F;
- tag >>= 7;
- }
- while (tag);
- while (n--)
- {
- unsigned char oo;
-
- oo = octs[n] | ((n > 0) << 7);
- if (odr_putc(o, oo) < 0)
- return -1;
- }
- return 0;
- }
-}
-
-/* ber_dectag
- * Decode BER identifier octets. Return number of bytes read or -1 for error.
- */
-int ber_dectag(const unsigned char *b, int *zclass, int *tag,
- int *constructed, int max)
-{
- int l = 1;
-
- if (l > max)
- return -1;
-
- *zclass = *b >> 6;
- *constructed = (*b >> 5) & 0X01;
- if ((*tag = *b & 0x1F) <= 30)
- return 1;
- *tag = 0;
- do
- {
- if (l >= max)
- return -1;
- *tag <<= 7;
- *tag |= b[l] & 0X7F;
- }
- while (b[l++] & 0X80);
- return l;
-}