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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
//run this on the file from a wget http://marc.ucis.ano/?get=0&version=3
#define M_TYPE_NULL 0
#define M_TYPE_STRING 1
#define M_TYPE_LIST 2
#define M_TYPE_DICT 3
char *type[]={"NULL","string","list","dict"};
int indent;
void pi() {
int i;
for(i=0;i<indent;i++) {
printf("%s"," ");
}
}
int marc_decode(unsigned char *data,int from_index,int length) {
char *s;
unsigned int cur_len=0;
unsigned char m_type=data[from_index];
from_index++;
char *key;
if(!length) return printf("dafuq? no length???"),-1;
pi();
printf("length: %d\n",length);
pi();
switch(m_type) {
case M_TYPE_NULL:
printf("[null]\n");
break;
case M_TYPE_STRING:
s=malloc(length);
memcpy(s,data+from_index,length-1);
s[length-1]=0;
printf("string: %s\n",s);
break;
case M_TYPE_LIST:
printf("list:\n");
indent++;
while(from_index < length) {
cur_len=data[from_index+3]+(data[from_index+2]<<1)+(data[from_index+1]<<2)+(data[from_index+0]<<3);
from_index+=4;
marc_decode(data,from_index,cur_len);
from_index+=cur_len;
}
indent--;
break;
case M_TYPE_DICT:
printf("dict:\n");
indent++;
while(from_index < length) {
cur_len=data[from_index];
pi();
printf("len: %d\n",cur_len);
from_index++;
if(cur_len == 0) break;
key=malloc(cur_len+1);
memcpy(key,data+from_index,cur_len);
key[cur_len]=0;
from_index+=cur_len;
pi();
printf("key: %s\n",key,cur_len);
cur_len=data[from_index+3]+(data[from_index+2]<<1)+(data[from_index+1]<<2)+(data[from_index+0]<<3);
from_index+=4;
indent++;
marc_decode(data,from_index,cur_len);
indent--;
from_index+=cur_len;
}
indent--;
break;
default:
printf("oh fuck. dahell is this!?!? %d\n",m_type);
break;
}
return 0;
}
void printhex(unsigned char *data,int length) {
for(;length;data++,length--) {
printf("%02x",*data);
}
}
void update_message_decode(unsigned char *data,int from_index,int length) {
printf("update_message version: %d len: %d\n",data[from_index],length);
if(data[from_index] != 2) return printf("this program only handles version 2 update messages.\n");
from_index++;
char pkey[32];
int i;
char *label;
unsigned int thedate=0;
unsigned char label_len=0,ext_type,num_extensions;
short ext_data_len;
memcpy(pkey,data+from_index,32);
from_index+=32;
char sig[64];
memcpy(sig,data+from_index,64);
from_index+=64;
printf("pkey: 0x");
printhex(pkey,32);
printf("\n");
printf("sig: 0x");
printhex(sig,64);
printf("\n");
//for(;from_index < length;) {
//timestamp, 4 bytes
thedate=(data[from_index]<<24)+(data[from_index+1]<<16)+(data[from_index+2]<<8)+(data[from_index+3]);
printf("thedate: %d\n",thedate);
from_index+=4;
//label length, 1 byte
label_len=data[from_index];
from_index++;
printf("label len: %d\n",label_len);
label=malloc(label_len);
memcpy(label,data+from_index,label_len);
label[label_len]=0;
printf("label: ");
printhex(label,label_len);
printf("\n");
from_index+=label_len;
num_extensions=data[from_index];
printf("num of extensions: %d\n",num_extensions);
from_index++;
for(i=0;i<num_extensions;i++) {
ext_type=data[from_index];
from_index++;
ext_data_len=(data[from_index]<<8) + (data[from_index+1]);
from_index+=2;
from_index+=ext_data_len;//skip this for now... fuck it.
printf(" ext %d type: %d len: %d\n",i,ext_type,ext_data_len);
if(ext_type != 1 && ext_type != 4) return printf("fuckfuckfuckfuck...\n"),0;
}
marc_decode(data+from_index,0,length);
//}
return;
}
void interactive_http_sync(unsigned char *data,int from_index,int length) {
int i;
unsigned int update_length;
unsigned char ext_type;
unsigned short ext_data_len;
unsigned char version=data[from_index];
from_index++;
unsigned char num_extensions=data[from_index];
from_index++;
printf("interactive_http_sync version: %d\n",version);
printf("num_extensions: %d\n",num_extensions);
for(i=0;i<num_extensions;i++) {
ext_type=data[from_index];
from_index++;
ext_data_len=(data[from_index]<<8)+data[from_index+1];
from_index+=2;
printf("extension: type:%d data_len:%d\n",ext_type,ext_data_len);
from_index+=ext_data_len;
}
for(;from_index < length;) {
printf("from_index: %d\n",from_index);
update_length=(data[from_index]<<24)+(data[from_index+1]<<16)+(data[from_index+2]<<8)+(data[from_index+3]);
from_index+=4;
if(update_length == 0) return printf("ohfuck.\n");
update_message_decode(data,from_index,update_length);
from_index += update_length;
}
}
int main(int argc,char *argv[]) {
indent=0;
if(argc < 2) return printf("usage: %s filename\n",argv[0]),0;
FILE *fp=fopen(argv[1],"r");
fseek(fp,0L,SEEK_END);
long len=ftell(fp);
fseek(fp,0L,SEEK_SET);
unsigned char *db;
db=malloc(len+1);
if((int)db == -1) return printf("failed to malloc(%d)",len),0;
fread(db,1,len,fp);
interactive_http_sync(db,0,len);
/*
marc_decode("\x01\x41\x41\x41",0,4);
printf("\n");
marc_decode("\x02\x00\x00\x00\x04\x01\x41\x41\x41\x00\x00\x00\x04\x01\x42\x41\x42",0,17);
printf("\n");
// \x04BLAH == KLAH dafuq?
marc_decode("\x03\x04\x42LAH\x00\x00\x00\x05\x01""foOo\x04NoPe\x00\x00\x00\x07\x01wtfftw",0,31);
*/
return 0;
}
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