mirror of
https://github.com/zeek/zeek.git
synced 2025-10-09 18:18:19 +00:00
2481f9f837
There was no check/handling for if magic_buffer() returns null. Also centralized libmagic calls for consistent error handling/output.
61 lines
1.3 KiB
C++
61 lines
1.3 KiB
C++
#include <algorithm>
|
|
|
|
#include "FileAnalyzer.h"
|
|
#include "Reporter.h"
|
|
#include "util.h"
|
|
|
|
magic_t File_Analyzer::magic = 0;
|
|
magic_t File_Analyzer::magic_mime = 0;
|
|
|
|
File_Analyzer::File_Analyzer(Connection* conn)
|
|
: TCP_ApplicationAnalyzer(AnalyzerTag::File, conn)
|
|
{
|
|
buffer_len = 0;
|
|
|
|
bro_init_magic(&magic, MAGIC_NONE);
|
|
bro_init_magic(&magic_mime, MAGIC_MIME);
|
|
}
|
|
|
|
void File_Analyzer::DeliverStream(int len, const u_char* data, bool orig)
|
|
{
|
|
TCP_ApplicationAnalyzer::DeliverStream(len, data, orig);
|
|
|
|
int n = min(len, BUFFER_SIZE - buffer_len);
|
|
|
|
if ( n )
|
|
{
|
|
strncpy(buffer + buffer_len, (const char*) data, n);
|
|
buffer_len += n;
|
|
|
|
if ( buffer_len == BUFFER_SIZE )
|
|
Identify();
|
|
}
|
|
return;
|
|
}
|
|
|
|
void File_Analyzer::Done()
|
|
{
|
|
TCP_ApplicationAnalyzer::Done();
|
|
|
|
if ( buffer_len && buffer_len != BUFFER_SIZE )
|
|
Identify();
|
|
}
|
|
|
|
void File_Analyzer::Identify()
|
|
{
|
|
const char* descr = 0;
|
|
const char* mime = 0;
|
|
|
|
if ( magic )
|
|
descr = bro_magic_buffer(magic, buffer, buffer_len);
|
|
|
|
if ( magic_mime )
|
|
mime = bro_magic_buffer(magic_mime, buffer, buffer_len);
|
|
|
|
val_list* vl = new val_list;
|
|
vl->append(BuildConnVal());
|
|
vl->append(new StringVal(buffer_len, buffer));
|
|
vl->append(new StringVal(descr ? descr : "<unknown>"));
|
|
vl->append(new StringVal(mime ? mime : "<unknown>"));
|
|
ConnectionEvent(file_transferred, vl);
|
|
}
|