50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
#include "asn1.h"
|
|
|
|
int scan_asn1oid(const char* src,const char* max) {
|
|
int res,tmp;
|
|
unsigned long tag,tlen;
|
|
enum asn1_tagclass tc;
|
|
enum asn1_tagtype tt;
|
|
if (!(res=scan_asn1tag(src,max,&tc,&tt,&tag))) goto error;
|
|
if (!(tmp=scan_asn1length(src+res,max,&tlen))) goto error;
|
|
res+=tmp;
|
|
{
|
|
unsigned int i,x,y;
|
|
tmp=0;
|
|
for(i=0;src[res+i]&128;++i)
|
|
tmp=(tmp<<7)+((unsigned char)src[res+i]&(~128));
|
|
tmp=(tmp<<7)+(unsigned char)src[res+i]; ++i;
|
|
x=tmp/40; y=tmp-x*40;
|
|
/* AFAIK gilt fuer alle bisher zugewiesenen OIDs: x<=2 & y<40 */
|
|
#if 1
|
|
/* Hier wird das Beispiel aus dem Standard korrekt geparst. */
|
|
while (x>2) { --x; y+=40; }
|
|
#else
|
|
/* Hier nicht. Dennoch arbeiten einige ASN.1 Parser ebenso. */
|
|
while (y>40) { y-=40; ++x; }
|
|
#endif
|
|
#if 0
|
|
buffer_putulong(buffer_2,x);
|
|
buffer_puts(buffer_2,".");
|
|
buffer_putulong(buffer_2,y);
|
|
#endif
|
|
for(;i<tlen;++i) {
|
|
tmp=0;
|
|
for(;src[res+i]&128;++i)
|
|
tmp=(tmp<<7)+((unsigned char)src[res+i]&(~128));
|
|
tmp=(tmp<<7)+(unsigned char)src[res+i];
|
|
#if 0
|
|
buffer_puts(buffer_2,".");
|
|
buffer_putulong(buffer_2,tmp);
|
|
#endif
|
|
}
|
|
#if 0
|
|
buffer_putsflush(buffer_2,"\n");
|
|
#endif
|
|
}
|
|
return res+tlen;
|
|
error:
|
|
return 0;
|
|
}
|
|
|