/*
* Returns: Number of bytes read or 0 if no match, -1 if error.
*/
int ber_decinteger(const unsigned char *buf, Odr_int *val, int max)
{
const unsigned char *b = buf;
unsigned char fill;
int res, len, remains;
union { int i; unsigned char c[sizeof(int)]; } tmp;
if ((res = ber_declen(b, &len, max)) < 0)
return -1;
if (len+res > max || len < 0) /* out of bounds or indefinite encoding */
return -1;
if (len > (int) sizeof(int)) /* let's be reasonable, here */
return -1;
b+= res;
remains = sizeof(int) - len;
memcpy(tmp.c + remains, b, len);
if (*b & 0X80)
fill = 0XFF;
else
fill = 0X00;
memset(tmp.c, fill, remains);
*val = ntohl(tmp.i);
b += len;
return b - buf;
}
int completeBER_n(const unsigned char *buf, int len, int level)
{
int res, ll, zclass, tag, cons;
const unsigned char *b = buf;
if (level > 1000)
{
#if BER_ANY_DEBUG
yaz_log(YLOG_LOG, "completeBER lev=%d len=%d", level, len);
#endif
return -2;
}
if (len < 2)
return 0;
if (!buf[0] && !buf[1])
return -2;
if ((res = ber_dectag(b, &zclass, &tag, &cons, len)) <= 0)
return 0;
b += res;
len -= res;
assert (len >= 0);
res = ber_declen(b, &ll, len);
if (res == -2)
{
#if BER_ANY_DEBUG
yaz_log(YLOG_LOG, "<<<<<<<<< return1 lev=%d res=%d", level, res);
#endif
return -1; /* error */
}
if (res == -1)
{
#if BER_ANY_DEBUG
yaz_log(YLOG_LOG, "<<<<<<<<< return2 lev=%d res=%d", level, res);
#endif
return 0; /* incomplete length */
}
b += res;
len -= res;
if (ll >= 0)
{ /* definite length */
if (len < ll)
{
#if BER_ANY_DEBUG
yaz_log(YLOG_LOG, "<<<<<<<<< return5 lev=%d len=%d ll=%d",
level, len, ll);
#endif
return 0;
}
return ll + (b-buf);
}
/* indefinite length */
if (!cons)
{ /* if primitive, it's an error */
#if BER_ANY_DEBUG
yaz_log(YLOG_LOG, "<<<<<<<<< return6 lev=%d ll=%d len=%d res=%d",
level, ll, len, res);
#endif
return -1; /* error */
}
/* constructed - cycle through children */
while (len >= 2)
{
if (b[0] == 0 && b[1] == 0)
break;
res = completeBER_n(b, len, level+1);
if (res <= 0)
return res;
b += res;
len -= res;
}
if (len < 2)
return 0;
return (b - buf) + 2;
}
int ber_bitstring(ODR o, Odr_bitmask *p, int cons)
{
int res, len;
const char *base;
switch (o->direction)
{
case ODR_DECODE:
if ((res = ber_declen(o->op->bp, &len, odr_max(o))) < 0)
{
odr_seterror(o, OPROTO, 4);
return 0;
}
o->op->bp += res;
if (cons) /* fetch component strings */
{
base = o->op->bp;
while (odp_more_chunks(o, base, len))
if (!odr_bitstring(o, &p, 0, 0))
return 0;
return 1;
}
/* primitive bitstring */
if (len < 0)
{
odr_seterror(o, OOTHER, 5);
return 0;
}
if (len == 0)
return 1;
if (len - 1 > ODR_BITMASK_SIZE)
{
odr_seterror(o, OOTHER, 6);
return 0;
}
if (len > odr_max(o))
{
odr_seterror(o, OOTHER, 7);
return 0;
}
o->op->bp++; /* silently ignore the unused-bits field */
len--;
memcpy(p->bits + p->top + 1, o->op->bp, len);
p->top += len;
o->op->bp += len;
return 1;
case ODR_ENCODE:
if ((res = ber_enclen(o, p->top + 2, 5, 0)) < 0)
return 0;
if (odr_putc(o, 0) < 0) /* no unused bits here */
return 0;
if (p->top < 0)
return 1;
if (odr_write(o, p->bits, p->top + 1) < 0)
return 0;
return 1;
case ODR_PRINT:
return 1;
default:
odr_seterror(o, OOTHER, 8);
return 0;
}
}
