/* * 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; } }