mirror of
https://github.com/moparisthebest/hexchat
synced 2024-12-24 08:38:54 -05:00
347 lines
8.5 KiB
C
347 lines
8.5 KiB
C
/* XChat-WDK
|
|
* Copyright (c) 2010-2011 Berke Viktor.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <malloc.h>
|
|
#include <errno.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <openssl/sha.h>
|
|
|
|
#include "xchat-plugin.h"
|
|
|
|
#define BUFSIZE 32768
|
|
#define DEFAULT_MAX_HASH_SIZE 268435456 /* default size is 256 MB */
|
|
#define FILE_BUF_SIZE 512
|
|
|
|
#ifndef snprintf
|
|
#define snprintf _snprintf
|
|
#endif
|
|
#ifndef stat64
|
|
#define stat64 _stat64
|
|
#endif
|
|
|
|
static xchat_plugin *ph; /* plugin handle */
|
|
static int config_fail; /* variable for config availability */
|
|
|
|
/* Use of OpenSSL SHA256 interface: http://adamlamers.com/?p=5 */
|
|
static void
|
|
sha256_hash_string (unsigned char hash[SHA256_DIGEST_LENGTH], char outputBuffer[65])
|
|
{
|
|
int i;
|
|
for (i = 0; i < SHA256_DIGEST_LENGTH; i++)
|
|
{
|
|
sprintf (outputBuffer + (i * 2), "%02x", hash[i]);
|
|
}
|
|
outputBuffer[64] = 0;
|
|
}
|
|
|
|
static void
|
|
sha256 (char *string, char outputBuffer[65])
|
|
{
|
|
int i;
|
|
unsigned char hash[SHA256_DIGEST_LENGTH];
|
|
SHA256_CTX sha256;
|
|
|
|
SHA256_Init (&sha256);
|
|
SHA256_Update (&sha256, string, strlen (string));
|
|
SHA256_Final (hash, &sha256);
|
|
|
|
for (i = 0; i < SHA256_DIGEST_LENGTH; i++)
|
|
{
|
|
sprintf (outputBuffer + (i * 2), "%02x", hash[i]);
|
|
}
|
|
outputBuffer[64] = 0;
|
|
}
|
|
|
|
static int
|
|
sha256_file (char *path, char outputBuffer[65])
|
|
{
|
|
int bytesRead;
|
|
unsigned char *buffer;
|
|
unsigned char hash[SHA256_DIGEST_LENGTH];
|
|
SHA256_CTX sha256;
|
|
|
|
FILE *file = fopen (path, "rb");
|
|
if (!file)
|
|
{
|
|
return -534;
|
|
}
|
|
|
|
SHA256_Init (&sha256);
|
|
buffer = malloc (BUFSIZE);
|
|
bytesRead = 0;
|
|
|
|
if (!buffer)
|
|
{
|
|
return ENOMEM;
|
|
}
|
|
|
|
while ((bytesRead = fread (buffer, 1, BUFSIZE, file)))
|
|
{
|
|
SHA256_Update (&sha256, buffer, bytesRead);
|
|
}
|
|
|
|
SHA256_Final (hash, &sha256);
|
|
sha256_hash_string (hash, outputBuffer);
|
|
|
|
fclose (file);
|
|
free (buffer);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
init ()
|
|
{
|
|
/* check whether the config file exists, if it doesn't, try to create it */
|
|
FILE * file_in;
|
|
FILE * file_out;
|
|
char buffer[FILE_BUF_SIZE];
|
|
|
|
config_fail = 0;
|
|
snprintf (buffer, sizeof (buffer), "%s/checksum.conf", xchat_get_info (ph, "xchatdirfs"));
|
|
|
|
if ((file_in = fopen (buffer, "r")) == NULL)
|
|
{
|
|
if ((file_out = fopen (buffer, "w")) == NULL)
|
|
{
|
|
config_fail = 1;
|
|
} else
|
|
{
|
|
fprintf (file_out, "%llu\n", (unsigned long long) DEFAULT_MAX_HASH_SIZE);
|
|
fclose (file_out);
|
|
}
|
|
} else
|
|
{
|
|
fclose (file_in);
|
|
}
|
|
|
|
/* nasty easter egg: if FILE_BUF_SIZE is set to 1024 and you build for x86, you can do fclose ()
|
|
at the end of init (), which is plain wrong as it will only work if fopen () != 0. */
|
|
}
|
|
|
|
static unsigned long long
|
|
get_max_hash_size ()
|
|
{
|
|
FILE * file_in;
|
|
char buffer[FILE_BUF_SIZE];
|
|
unsigned long long max_hash_size;
|
|
|
|
if (config_fail)
|
|
{
|
|
return (unsigned long long) DEFAULT_MAX_HASH_SIZE;
|
|
} else
|
|
{
|
|
snprintf (buffer, sizeof (buffer), "%s/checksum.conf", xchat_get_info (ph, "xchatdirfs"));
|
|
file_in = fopen (buffer, "r");
|
|
fscanf (file_in, "%llu", &max_hash_size);
|
|
|
|
fclose (file_in);
|
|
return max_hash_size;
|
|
}
|
|
}
|
|
|
|
static void
|
|
print_size ()
|
|
{
|
|
unsigned long long size;
|
|
char suffix[3];
|
|
|
|
size = get_max_hash_size ();
|
|
|
|
if (size >= 1073741824)
|
|
{
|
|
size /= 1073741824;
|
|
snprintf (suffix, sizeof (suffix), "GB");
|
|
} else if (size >= 1048576)
|
|
{
|
|
size /= 1048576;
|
|
snprintf (suffix, sizeof (suffix), "MB");
|
|
} else if (size >= 1024)
|
|
{
|
|
size /= 1024;
|
|
snprintf (suffix, sizeof (suffix), "kB");
|
|
} else
|
|
{
|
|
snprintf (suffix, sizeof (suffix), "B");
|
|
}
|
|
xchat_printf (ph, "File size limit for checksums: %llu %s\n", size, suffix);
|
|
}
|
|
|
|
static void
|
|
increase_max_hash_size ()
|
|
{
|
|
unsigned long long size;
|
|
FILE * file_out;
|
|
char buffer[FILE_BUF_SIZE];
|
|
|
|
if (config_fail)
|
|
{
|
|
xchat_printf (ph, "Config file is unavailable, falling back to the default value\n");
|
|
print_size ();
|
|
} else
|
|
{
|
|
size = get_max_hash_size ();
|
|
if (size <= ULLONG_MAX/2)
|
|
{
|
|
size *= 2;
|
|
}
|
|
|
|
snprintf (buffer, sizeof (buffer), "%s/checksum.conf", xchat_get_info (ph, "xchatdirfs"));
|
|
file_out = fopen (buffer, "w");
|
|
fprintf (file_out, "%llu\n", size);
|
|
fclose (file_out);
|
|
print_size ();
|
|
}
|
|
}
|
|
|
|
static void
|
|
decrease_max_hash_size ()
|
|
{
|
|
unsigned long long size;
|
|
FILE * file_out;
|
|
char buffer[FILE_BUF_SIZE];
|
|
|
|
if (config_fail)
|
|
{
|
|
xchat_printf (ph, "Config file is unavailable, falling back to the default value\n");
|
|
print_size ();
|
|
} else
|
|
{
|
|
size = get_max_hash_size ();
|
|
if (size >= 2)
|
|
{
|
|
size /= 2;
|
|
}
|
|
|
|
snprintf (buffer, sizeof (buffer), "%s/checksum.conf", xchat_get_info (ph, "xchatdirfs"));
|
|
file_out = fopen (buffer, "w");
|
|
fprintf (file_out, "%llu\n", size);
|
|
fclose (file_out);
|
|
print_size ();
|
|
}
|
|
}
|
|
|
|
static int
|
|
dccrecv_cb (char *word[], void *userdata)
|
|
{
|
|
int result;
|
|
struct stat64 buffer; /* buffer for storing file info */
|
|
char sum[65]; /* buffer for checksum */
|
|
|
|
result = stat64 (word[2], &buffer);
|
|
if (result == 0) /* stat returns 0 on success */
|
|
{
|
|
if (buffer.st_size <= get_max_hash_size ())
|
|
{
|
|
sha256_file (word[2], sum); /* word[2] is the full filename */
|
|
/* try to print the checksum in the privmsg tab of the sender */
|
|
xchat_set_context (ph, xchat_find_context (ph, NULL, word[3]));
|
|
xchat_printf (ph, "SHA-256 checksum for %s (local): %s\n", word[1], sum);
|
|
} else
|
|
{
|
|
xchat_set_context (ph, xchat_find_context (ph, NULL, word[3]));
|
|
xchat_printf (ph, "SHA-256 checksum for %s (local): (size limit reached, no checksum calculated, you can increase it with /CHECKSUM INC)\n", word[1]);
|
|
}
|
|
} else
|
|
{
|
|
xchat_printf (ph, "File access error\n");
|
|
}
|
|
|
|
return XCHAT_EAT_NONE;
|
|
}
|
|
|
|
static int
|
|
dccoffer_cb (char *word[], void *userdata)
|
|
{
|
|
int result;
|
|
struct stat64 buffer; /* buffer for storing file info */
|
|
char sum[65]; /* buffer for checksum */
|
|
|
|
result = stat64 (word[3], &buffer);
|
|
if (result == 0) /* stat returns 0 on success */
|
|
{
|
|
if (buffer.st_size <= get_max_hash_size ())
|
|
{
|
|
sha256_file (word[3], sum); /* word[3] is the full filename */
|
|
xchat_commandf (ph, "quote PRIVMSG %s :SHA-256 checksum for %s (remote): %s", word[2], word[1], sum);
|
|
} else
|
|
{
|
|
xchat_set_context (ph, xchat_find_context (ph, NULL, word[3]));
|
|
xchat_printf (ph, "quote PRIVMSG %s :SHA-256 checksum for %s (remote): (size limit reached, no checksum calculated)", word[2], word[1]);
|
|
}
|
|
} else
|
|
{
|
|
xchat_printf (ph, "File access error\n");
|
|
}
|
|
|
|
return XCHAT_EAT_NONE;
|
|
}
|
|
|
|
static void
|
|
checksum (char *word[], void *userdata)
|
|
{
|
|
if (!stricmp ("GET", word[2]))
|
|
{
|
|
print_size ();
|
|
} else if (!stricmp ("INC", word[2]))
|
|
{
|
|
increase_max_hash_size ();
|
|
} else if (!stricmp ("DEC", word[2]))
|
|
{
|
|
decrease_max_hash_size ();
|
|
} else
|
|
{
|
|
xchat_printf (ph, "Usage: /CHECKSUM GET|INC|DEC\n");
|
|
xchat_printf (ph, " GET - print the maximum file size to be hashed\n");
|
|
xchat_printf (ph, " INC - double the maximum file size to be hashed\n");
|
|
xchat_printf (ph, " DEC - halve the maximum file size to be hashed\n");
|
|
}
|
|
}
|
|
|
|
int
|
|
xchat_plugin_init (xchat_plugin *plugin_handle, char **plugin_name, char **plugin_desc, char **plugin_version, char *arg)
|
|
{
|
|
ph = plugin_handle;
|
|
|
|
*plugin_name = "Checksum";
|
|
*plugin_desc = "Calculate checksum for DCC file transfers";
|
|
*plugin_version = "2.0";
|
|
|
|
init ();
|
|
|
|
xchat_hook_command (ph, "CHECKSUM", XCHAT_PRI_NORM, checksum, "Usage: /CHECKSUM GET|INC|DEC", 0);
|
|
xchat_hook_print (ph, "DCC RECV Complete", XCHAT_PRI_NORM, dccrecv_cb, NULL);
|
|
xchat_hook_print (ph, "DCC Offer", XCHAT_PRI_NORM, dccoffer_cb, NULL);
|
|
|
|
xchat_print (ph, "Checksum plugin loaded\n");
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
xchat_plugin_deinit (void)
|
|
{
|
|
xchat_print (ph, "Checksum plugin unloaded\n");
|
|
return 1;
|
|
}
|