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/*
* This file stores code common to the command line tools.
* XXX: This should be converted to a proper library.
*
* Copyright (C) 2005-2008,2011 Timothy D. Morgan
* Copyright (C) 2002 Richard Sharpe, rsharpe@richardsharpe.com
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id$
*/
#include <iconv.h>
iconv_t conv_desc;
const char* key_special_chars = ",\"/";
const char* subfield_special_chars = ",\"|";
const char* common_special_chars = ",\"";
#define REGLOOKUP_EXIT_OK 0
#define REGLOOKUP_EXIT_OSERR 71
#define REGLOOKUP_EXIT_USAGE 64
#define REGLOOKUP_EXIT_DATAERR 65
#define REGLOOKUP_EXIT_NOINPUT 66
/* Windows is lame */
#ifdef O_BINARY
#define REGLOOKUP_OPEN_FLAGS O_RDONLY|O_BINARY
#else
#define REGLOOKUP_OPEN_FLAGS O_RDONLY
#endif
void bailOut(int code, char* message)
{
fprintf(stderr, "%s", message);
exit(code);
}
void printMsgs()
{
char* msgs = regfi_log_get_str();
if(msgs != NULL)
{
fprintf(stderr, "%s", msgs);
free(msgs);
}
}
void clearMsgs()
{
char* msgs = regfi_log_get_str();
if(msgs != NULL)
free(msgs);
}
/* Returns a newly malloc()ed string which contains original buffer,
* except for non-printable or special characters are quoted in hex
* with the syntax '%QQ' where QQ is the hex ascii value of the quoted
* character. A null terminator is added, since only ascii, not binary,
* is returned.
*/
static char* quote_buffer(const unsigned char* str,
unsigned int len, const char* special)
{
unsigned int i, added_len;
unsigned int num_written = 0;
unsigned int buf_len = sizeof(char)*(len+1);
char* ret_val = NULL;
char* tmp_buf;
if(buf_len > 0)
ret_val = malloc(buf_len);
if(ret_val == NULL)
return NULL;
for(i=0; i<len; i++)
{
if(buf_len <= (num_written+5))
{
/* Expand the buffer by the memory consumption rate seen so far
* times the amount of input left to process. The expansion is bounded
* below by a minimum safety increase, and above by the maximum possible
* output string length. This should minimize both the number of
* reallocs() and the amount of wasted memory.
*/
added_len = (len-i)*num_written/(i+1);
if((buf_len+added_len) > (len*4+1))
buf_len = len*4+1;
else
{
if (added_len < 5)
buf_len += 5;
else
buf_len += added_len;
}
tmp_buf = realloc(ret_val, buf_len);
if(tmp_buf == NULL)
{
free(ret_val);
return NULL;
}
ret_val = tmp_buf;
}
if(str[i] < 32 || str[i] > 126
|| str[i] == '%' || strchr(special, str[i]) != NULL)
{
num_written += snprintf(ret_val + num_written, buf_len - num_written,
"%%%.2X", str[i]);
}
else
ret_val[num_written++] = str[i];
}
ret_val[num_written] = '\0';
return ret_val;
}
/* Returns a newly malloc()ed string which contains original string,
* except for non-printable or special characters are quoted in hex
* with the syntax '%QQ' where QQ is the hex ascii value of the quoted
* character.
*/
static char* quote_string(const char* str, const char* special)
{
unsigned int len;
if(str == NULL)
return NULL;
len = strlen(str);
return quote_buffer((const unsigned char*)str, len, special);
}
/*
* Convert a data value to a string for display. Returns NULL on error,
* and the string to display if there is no error, or a non-fatal
* error. On any error (fatal or non-fatal) occurs, (*error_msg) will
* be set to a newly allocated string, containing an error message. If
* a memory allocation failure occurs while generating the error
* message, both the return value and (*error_msg) will be NULL. It
* is the responsibility of the caller to free both a non-NULL return
* value, and a non-NULL (*error_msg).
*/
static char* data_to_ascii(const REGFI_DATA* data, char** error_msg)
{
char* ret_val;
char* cur_quoted;
char* tmp_ptr;
char* delim;
uint32_t ret_val_left, i, tmp_len;
if(data == NULL || data->size == 0)
{
*error_msg = (char*)malloc(37);
if(*error_msg == NULL)
return NULL;
strcpy(*error_msg, "Data pointer was NULL or size was 0.");
return NULL;
}
*error_msg = NULL;
if(data->interpreted_size == 0)
{
*error_msg = (char*)malloc(51);
if(*error_msg == NULL)
return NULL;
strcpy(*error_msg, "Data could not be interpreted, quoting raw buffer.");
return quote_buffer(data->raw, data->size, subfield_special_chars);
}
switch (data->type)
{
case REG_SZ:
ret_val = quote_string((char*)data->interpreted.string, common_special_chars);
if(ret_val == NULL && (*error_msg = (char*)malloc(49)) != NULL)
strcpy(*error_msg, "Buffer could not be quoted due to unknown error.");
return ret_val;
break;
case REG_EXPAND_SZ:
ret_val = quote_string((char*)data->interpreted.expand_string,
common_special_chars);
if(ret_val == NULL && (*error_msg = (char*)malloc(49)) != NULL)
strcpy(*error_msg, "Buffer could not be quoted due to unknown error.");
return ret_val;
break;
case REG_LINK:
ret_val = quote_string((char*)data->interpreted.link, common_special_chars);
if(ret_val == NULL && (*error_msg = (char*)malloc(49)) != NULL)
strcpy(*error_msg, "Buffer could not be quoted due to unknown error.");
return ret_val;
break;
case REG_DWORD:
ret_val = malloc(sizeof(char)*(8+2+1));
if(ret_val == NULL)
return NULL;
sprintf(ret_val, "0x%.8X", data->interpreted.dword);
return ret_val;
break;
case REG_DWORD_BE:
ret_val = malloc(sizeof(char)*(8+2+1));
if(ret_val == NULL)
return NULL;
sprintf(ret_val, "0x%.8X", data->interpreted.dword_be);
return ret_val;
break;
case REG_QWORD:
ret_val = malloc(sizeof(char)*(16+2+1));
if(ret_val == NULL)
return NULL;
sprintf(ret_val, "0x%.16llX",
(long long unsigned int)data->interpreted.qword);
return ret_val;
break;
case REG_MULTI_SZ:
ret_val_left = data->interpreted_size*4+1;
ret_val = malloc(ret_val_left);
if(ret_val == NULL)
return NULL;
tmp_ptr = ret_val;
tmp_ptr[0] = '\0';
delim = "";
for(i=0; data->interpreted.multiple_string[i] != NULL; i++)
{
cur_quoted = quote_string((char*)data->interpreted.multiple_string[i],
subfield_special_chars);
if(cur_quoted != NULL)
{
tmp_len = snprintf(tmp_ptr, ret_val_left, "%s%s",delim, cur_quoted);
tmp_ptr += tmp_len;
ret_val_left -= tmp_len;
free(cur_quoted);
}
delim = "|";
}
return ret_val;
break;
case REG_NONE:
return quote_buffer(data->interpreted.none, data->interpreted_size,
common_special_chars);
break;
case REG_RESOURCE_LIST:
return quote_buffer(data->interpreted.resource_list, data->interpreted_size,
common_special_chars);
break;
case REG_FULL_RESOURCE_DESCRIPTOR:
return quote_buffer(data->interpreted.full_resource_descriptor,
data->interpreted_size, common_special_chars);
break;
case REG_RESOURCE_REQUIREMENTS_LIST:
return quote_buffer(data->interpreted.resource_requirements_list,
data->interpreted_size, common_special_chars);
break;
case REG_BINARY:
return quote_buffer(data->interpreted.binary, data->interpreted_size,
common_special_chars);
break;
default:
/* This shouldn't happen, since the regfi routines won't interpret
* unknown types, but just as a safety measure against library changes...
*/
*error_msg = (char*)malloc(65);
if(*error_msg == NULL)
return NULL;
sprintf(*error_msg,
"Unrecognized registry data type (0x%.8X); quoting as binary.",
data->type);
return quote_buffer(data->raw, data->size, common_special_chars);
}
return NULL;
}
static char* get_quoted_keyname(const REGFI_NK* nk)
{
char* ret_val;
if(nk->name == NULL)
ret_val = quote_buffer(nk->name_raw, nk->name_length, key_special_chars);
else
ret_val = quote_string(nk->name, key_special_chars);
return ret_val;
}
static char* get_quoted_valuename(const REGFI_VK* vk)
{
char* ret_val;
if(vk->name == NULL)
ret_val = quote_buffer(vk->name_raw, vk->name_length,
key_special_chars);
else
ret_val = quote_string(vk->name, key_special_chars);
return ret_val;
}
int openHive(const char* filename)
{
int ret_val;
/* open an existing file */
if ((ret_val = open(filename, REGLOOKUP_OPEN_FLAGS)) == -1)
{
fprintf(stderr, "ERROR: Failed to open hive. Error returned: %s\n",
strerror(errno));
return -1;
}
return ret_val;
}
void formatTime(REGFI_NTTIME nttime, char* output)
{
time_t tmp_time[1];
struct tm* tmp_time_s = NULL;
*tmp_time = (time_t)regfi_nt2unix_time(nttime);
tmp_time_s = gmtime(tmp_time);
strftime(output,
(4+1+2+1+2)+1+(2+1+2+1+2)+1,
"%Y-%m-%d %H:%M:%S",
tmp_time_s);
}
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