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checksum: Use glib for io/checksum and misc fixes

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- Fixes support for large files.
- Fixes filenames not being passed in the filename encoding.
- Drops openssl dependency.
- Code cleanup.
- Fix 'unknown command' warning.
wip/connecting
TingPing 9 years ago
parent 226d54c90d
commit 94568bc517
2 changed files with 123 additions and 159 deletions
Show Stats Download Patch File Download Diff File

8
configure.ac
Unescape Escape View File

@ -457,14 +457,8 @@ if test "$checksum" != "no"; then
checksum=no
AC_MSG_CHECKING(for plugin interface used by Checksum)
if test "$plugin" = yes; then
checksum=yes
AC_MSG_RESULT([yes])
AC_MSG_CHECKING(for OpenSSL used by Checksum)
if test "$openssl" = yes; then
checksum=yes
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([OpenSSL cannot be found, use the --enable-openssl option])
fi
else
AC_MSG_RESULT([plugins are disabled, use the --enable-plugin option])
fi

274
plugins/checksum/checksum.c
Unescape Escape View File

@ -20,222 +20,192 @@
* THE SOFTWARE.
*/
#ifdef __APPLE__
#define __AVAILABILITYMACROS__
#define DEPRECATED_IN_MAC_OS_X_VERSION_10_7_AND_LATER
#endif
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <openssl/sha.h>
#include <glib.h>
#ifdef WIN32
#ifndef snprintf
#define snprintf _snprintf
#endif
#define stat _stat64
#else
/* for INT_MAX */
#include <limits.h>
#define __USE_LARGEFILE64
#define _LARGEFILE_SOURCE
#define _LARGEFILE64_SOURCE
#endif
#include <glib/gstdio.h>
#include <gio/gio.h>
#include "hexchat-plugin.h"
#define BUFSIZE 32768
#define DEFAULT_LIMIT 256 /* default size is 256 MiB */
#define SHA256_DIGEST_LENGTH 32
#define SHA256_BUFFER_LENGTH 65
static hexchat_plugin *ph; /* plugin handle */
static char name[] = "Checksum";
static char desc[] = "Calculate checksum for DCC file transfers";
static char version[] = "3.1";
/* Use of OpenSSL SHA256 interface: http://adamlamers.com/?p=5 */
static void
sha256_hash_string (unsigned char hash[SHA256_DIGEST_LENGTH], char outputBuffer[65])
set_limit (char *size)
{
int i;
for (i = 0; i < SHA256_DIGEST_LENGTH; i++)
int limit = atoi (size);
if (limit > 0 && limit < INT_MAX)
{
sprintf (outputBuffer + (i * 2), "%02x", hash[i]);
if (hexchat_pluginpref_set_int (ph, "limit", limit))
hexchat_printf (ph, "Checksum: File size limit has successfully been set to: %d MiB\n", limit);
else
hexchat_printf (ph, "Checksum: File access error while saving!\n");
}
outputBuffer[64] = 0;
}
#if 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++)
else
{
sprintf (outputBuffer + (i * 2), "%02x", hash[i]);
hexchat_printf (ph, "Checksum: Invalid input!\n");
}
outputBuffer[64] = 0;
}
#endif
static int
sha256_file (char *path, char outputBuffer[65])
get_limit ()
{
int bytesRead;
unsigned char *buffer;
unsigned char hash[SHA256_DIGEST_LENGTH];
SHA256_CTX sha256;
int size = hexchat_pluginpref_get_int (ph, "limit");
FILE *file = fopen (path, "rb");
if (!file)
{
return -534;
}
if (size <= 0 || size >= INT_MAX)
return DEFAULT_LIMIT;
else
return size;
}
SHA256_Init (&sha256);
buffer = malloc (BUFSIZE);
bytesRead = 0;
static gboolean
check_limit (GFile *file)
{
GFileInfo *file_info;
goffset file_size;
if (!buffer)
{
fclose (file);
return ENOMEM;
}
file_info = g_file_query_info (file, G_FILE_ATTRIBUTE_STANDARD_SIZE, G_FILE_QUERY_INFO_NONE,
NULL, NULL);
while ((bytesRead = fread (buffer, 1, BUFSIZE, file)))
{
SHA256_Update (&sha256, buffer, bytesRead);
}
if (!file_info)
return FALSE;
file_size = g_file_info_get_size (file_info);
g_object_unref (file_info);
SHA256_Final (hash, &sha256);
sha256_hash_string (hash, outputBuffer);
if (file_size > get_limit () * 1048576ll)
return FALSE;
fclose (file);
free (buffer);
return 0;
return TRUE;
}
static void
set_limit (char* size)
static gboolean
sha256_from_stream (GFileInputStream *file_stream, char out_buf[])
{
int buffer = atoi (size);
GChecksum *checksum;
gssize bytes_read;
guint8 digest[SHA256_DIGEST_LENGTH];
gsize digest_len = sizeof(digest);
guchar buffer[BUFSIZE];
gsize i;
if (buffer > 0 && buffer < INT_MAX)
checksum = g_checksum_new (G_CHECKSUM_SHA256);
while ((bytes_read = g_input_stream_read (G_INPUT_STREAM (file_stream), buffer, sizeof (buffer), NULL, NULL)))
{
if (hexchat_pluginpref_set_int (ph, "limit", buffer))
{
hexchat_printf (ph, "File size limit has successfully been set to: %d MiB\n", buffer);
}
else
if (bytes_read == -1)
{
hexchat_printf (ph, "File access error while saving!\n");
g_checksum_free (checksum);
return FALSE;
}
g_checksum_update (checksum, buffer, bytes_read);
}
else
g_checksum_get_digest (checksum, digest, &digest_len);
g_checksum_free (checksum);
for (i = 0; i < SHA256_DIGEST_LENGTH; i++)
{
hexchat_printf (ph, "Invalid input!\n");
/* out_buf will be exactly SHA256_BUFFER_LENGTH including null */
g_sprintf (out_buf + (i * 2), "%02x", digest[i]);
}
return TRUE;
}
static int
get_limit ()
static gboolean
sha256_from_file (char *filename, char out_buf[])
{
int size = hexchat_pluginpref_get_int (ph, "limit");
GFileInputStream *file_stream;
char *filename_fs;
GFile *file;
if (size <= -1 || size >= INT_MAX)
filename_fs = g_filename_from_utf8 (filename, -1, NULL, NULL, NULL);
if (!filename_fs)
{
return DEFAULT_LIMIT;
hexchat_printf (ph, "Checksum: Invalid filename (%s)\n", filename);
return FALSE;
}
else
file = g_file_new_for_path (filename_fs);
g_free (filename_fs);
if (!file)
{
return size;
hexchat_printf (ph, "Checksum: Failed to open %s\n", filename);
return FALSE;
}
}
static void
print_limit ()
{
hexchat_printf (ph, "File size limit for checksums: %d MiB", get_limit ());
}
static int
dccrecv_cb (char *word[], void *userdata)
{
int result;
struct stat buffer; /* buffer for storing file info */
char sum[65]; /* buffer for checksum */
const char *file;
char *cfile;
if (hexchat_get_prefs (ph, "dcc_completed_dir", &file, NULL) == 1 && file[0] != 0)
if (!check_limit (file))
{
cfile = g_strconcat (file, G_DIR_SEPARATOR_S, word[1], NULL);
hexchat_printf (ph, "Checksum: %s is larger than size limit. You can increase it with /CHECKSUM SET.\n", filename);
g_object_unref (file);
return FALSE;
}
else
file_stream = g_file_read (file, NULL, NULL);
if (!file_stream)
{
cfile = g_strdup(word[2]);
hexchat_printf (ph, "Checksum: Failed to read file %s\n", filename);
g_object_unref (file);
return FALSE;
}
result = stat (cfile, &buffer);
if (result == 0) /* stat returns 0 on success */
if (!sha256_from_stream (file_stream, out_buf))
{
if (buffer.st_size <= (unsigned long long) get_limit () * 1048576)
{
sha256_file (cfile, sum); /* file is the full filename even if completed dir set */
/* try to print the checksum in the privmsg tab of the sender */
hexchat_set_context (ph, hexchat_find_context (ph, NULL, word[3]));
hexchat_printf (ph, "SHA-256 checksum for %s (local): %s\n", word[1], sum);
}
else
{
hexchat_set_context (ph, hexchat_find_context (ph, NULL, word[3]));
hexchat_printf (ph, "SHA-256 checksum for %s (local): (size limit reached, no checksum calculated, you can increase it with /CHECKSUM INC)\n", word[1]);
}
hexchat_printf (ph, "Checksum: Failed to generate checksum for %s\n", filename);
g_object_unref (file_stream);
g_object_unref (file);
return FALSE;
}
g_object_unref (file_stream);
g_object_unref (file);
return TRUE;
}
static int
dccrecv_cb (char *word[], void *userdata)
{
const char *dcc_completed_dir;
char *filename, checksum[SHA256_BUFFER_LENGTH];
/* Print in the privmsg tab of the sender */
hexchat_set_context (ph, hexchat_find_context (ph, NULL, word[3]));
if (hexchat_get_prefs (ph, "dcc_completed_dir", &dcc_completed_dir, NULL) == 1 && dcc_completed_dir[0] != '\0')
filename = g_build_filename (dcc_completed_dir, word[1], NULL);
else
filename = g_strdup (word[2]);
if (sha256_from_file (filename, checksum))
{
hexchat_printf (ph, "File access error!\n");
hexchat_printf (ph, "SHA-256 checksum for %s (local): %s\n", word[1], checksum);
}
g_free (cfile);
g_free (filename);
return HEXCHAT_EAT_NONE;
}
static int
dccoffer_cb (char *word[], void *userdata)
{
int result;
struct stat buffer; /* buffer for storing file info */
char sum[65]; /* buffer for checksum */
char checksum[SHA256_BUFFER_LENGTH];
result = stat (word[3], &buffer);
if (result == 0) /* stat returns 0 on success */
{
if (buffer.st_size <= (unsigned long long) get_limit () * 1048576)
{
sha256_file (word[3], sum); /* word[3] is the full filename */
hexchat_commandf (ph, "quote PRIVMSG %s :SHA-256 checksum for %s (remote): %s", word[2], word[1], sum);
}
else
{
hexchat_set_context (ph, hexchat_find_context (ph, NULL, word[3]));
hexchat_printf (ph, "quote PRIVMSG %s :SHA-256 checksum for %s (remote): (size limit reached, no checksum calculated)", word[2], word[1]);
}
}
else
/* Print in the privmsg tab of the receiver */
hexchat_set_context (ph, hexchat_find_context (ph, NULL, word[3]));
if (sha256_from_file (word[3], checksum))
{
hexchat_printf (ph, "File access error!\n");
hexchat_commandf (ph, "quote PRIVMSG %s :SHA-256 checksum for %s (remote): %s", word[2], word[1], checksum);
}
return HEXCHAT_EAT_NONE;
@ -246,7 +216,7 @@ checksum (char *word[], char *word_eol[], void *userdata)
{
if (!g_ascii_strcasecmp ("GET", word[2]))
{
print_limit ();
hexchat_printf (ph, "File size limit for checksums: %d MiB", get_limit ());
}
else if (!g_ascii_strcasecmp ("SET", word[2]))
{
@ -259,7 +229,7 @@ checksum (char *word[], char *word_eol[], void *userdata)
hexchat_printf (ph, " SET <filesize> - set the maximum file size (in MiB) to be hashed\n");
}
return HEXCHAT_EAT_NONE;
return HEXCHAT_EAT_ALL;
}
int
@ -277,7 +247,7 @@ hexchat_plugin_init (hexchat_plugin *plugin_handle, char **plugin_name, char **p
hexchat_pluginpref_set_int (ph, "limit", DEFAULT_LIMIT);
}
hexchat_hook_command (ph, "CHECKSUM", HEXCHAT_PRI_NORM, checksum, "Usage: /CHECKSUM GET|SET", 0);
hexchat_hook_command (ph, "CHECKSUM", HEXCHAT_PRI_NORM, checksum, "Usage: /CHECKSUM GET|SET", NULL);
hexchat_hook_print (ph, "DCC RECV Complete", HEXCHAT_PRI_NORM, dccrecv_cb, NULL);
hexchat_hook_print (ph, "DCC Offer", HEXCHAT_PRI_NORM, dccoffer_cb, NULL);

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