checksum: Use glib for io/checksum and misc fixes
- Fixes support for large files. - Fixes filenames not being passed in the filename encoding. - Drops openssl dependency. - Code cleanup. - Fix 'unknown command' warning.
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94568bc517
@ -457,14 +457,8 @@ if test "$checksum" != "no"; then
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checksum=no
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AC_MSG_CHECKING(for plugin interface used by Checksum)
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if test "$plugin" = yes; then
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AC_MSG_RESULT([yes])
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AC_MSG_CHECKING(for OpenSSL used by Checksum)
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if test "$openssl" = yes; then
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checksum=yes
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AC_MSG_RESULT([yes])
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else
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AC_MSG_RESULT([OpenSSL cannot be found, use the --enable-openssl option])
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fi
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else
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AC_MSG_RESULT([plugins are disabled, use the --enable-plugin option])
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fi
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@ -20,131 +20,38 @@
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* THE SOFTWARE.
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*/
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#ifdef __APPLE__
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#define __AVAILABILITYMACROS__
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#define DEPRECATED_IN_MAC_OS_X_VERSION_10_7_AND_LATER
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <openssl/sha.h>
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#include <glib.h>
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#ifdef WIN32
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#ifndef snprintf
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#define snprintf _snprintf
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#endif
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#define stat _stat64
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#else
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/* for INT_MAX */
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#include <limits.h>
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#define __USE_LARGEFILE64
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#define _LARGEFILE_SOURCE
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#define _LARGEFILE64_SOURCE
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#endif
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#include <glib/gstdio.h>
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#include <gio/gio.h>
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#include "hexchat-plugin.h"
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#define BUFSIZE 32768
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#define DEFAULT_LIMIT 256 /* default size is 256 MiB */
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#define SHA256_DIGEST_LENGTH 32
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#define SHA256_BUFFER_LENGTH 65
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static hexchat_plugin *ph; /* plugin handle */
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static char name[] = "Checksum";
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static char desc[] = "Calculate checksum for DCC file transfers";
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static char version[] = "3.1";
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/* Use of OpenSSL SHA256 interface: http://adamlamers.com/?p=5 */
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static void
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sha256_hash_string (unsigned char hash[SHA256_DIGEST_LENGTH], char outputBuffer[65])
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set_limit (char *size)
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{
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int i;
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for (i = 0; i < SHA256_DIGEST_LENGTH; i++)
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int limit = atoi (size);
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if (limit > 0 && limit < INT_MAX)
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{
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sprintf (outputBuffer + (i * 2), "%02x", hash[i]);
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}
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outputBuffer[64] = 0;
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}
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#if 0
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static void
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sha256 (char *string, char outputBuffer[65])
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{
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int i;
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unsigned char hash[SHA256_DIGEST_LENGTH];
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SHA256_CTX sha256;
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SHA256_Init (&sha256);
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SHA256_Update (&sha256, string, strlen (string));
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SHA256_Final (hash, &sha256);
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for (i = 0; i < SHA256_DIGEST_LENGTH; i++)
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{
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sprintf (outputBuffer + (i * 2), "%02x", hash[i]);
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}
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outputBuffer[64] = 0;
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}
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#endif
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static int
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sha256_file (char *path, char outputBuffer[65])
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{
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int bytesRead;
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unsigned char *buffer;
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unsigned char hash[SHA256_DIGEST_LENGTH];
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SHA256_CTX sha256;
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FILE *file = fopen (path, "rb");
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if (!file)
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{
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return -534;
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}
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SHA256_Init (&sha256);
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buffer = malloc (BUFSIZE);
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bytesRead = 0;
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if (!buffer)
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{
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fclose (file);
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return ENOMEM;
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}
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while ((bytesRead = fread (buffer, 1, BUFSIZE, file)))
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{
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SHA256_Update (&sha256, buffer, bytesRead);
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}
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SHA256_Final (hash, &sha256);
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sha256_hash_string (hash, outputBuffer);
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fclose (file);
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free (buffer);
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return 0;
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}
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static void
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set_limit (char* size)
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{
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int buffer = atoi (size);
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if (buffer > 0 && buffer < INT_MAX)
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{
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if (hexchat_pluginpref_set_int (ph, "limit", buffer))
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{
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hexchat_printf (ph, "File size limit has successfully been set to: %d MiB\n", buffer);
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if (hexchat_pluginpref_set_int (ph, "limit", limit))
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hexchat_printf (ph, "Checksum: File size limit has successfully been set to: %d MiB\n", limit);
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else
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hexchat_printf (ph, "Checksum: File access error while saving!\n");
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}
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else
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{
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hexchat_printf (ph, "File access error while saving!\n");
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}
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}
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else
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{
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hexchat_printf (ph, "Invalid input!\n");
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hexchat_printf (ph, "Checksum: Invalid input!\n");
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}
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}
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@ -153,89 +60,152 @@ get_limit ()
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{
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int size = hexchat_pluginpref_get_int (ph, "limit");
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if (size <= -1 || size >= INT_MAX)
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{
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if (size <= 0 || size >= INT_MAX)
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return DEFAULT_LIMIT;
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}
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else
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{
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return size;
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}
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}
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static void
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print_limit ()
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static gboolean
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check_limit (GFile *file)
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{
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hexchat_printf (ph, "File size limit for checksums: %d MiB", get_limit ());
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GFileInfo *file_info;
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goffset file_size;
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file_info = g_file_query_info (file, G_FILE_ATTRIBUTE_STANDARD_SIZE, G_FILE_QUERY_INFO_NONE,
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NULL, NULL);
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if (!file_info)
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return FALSE;
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file_size = g_file_info_get_size (file_info);
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g_object_unref (file_info);
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if (file_size > get_limit () * 1048576ll)
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return FALSE;
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return TRUE;
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}
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static gboolean
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sha256_from_stream (GFileInputStream *file_stream, char out_buf[])
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{
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GChecksum *checksum;
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gssize bytes_read;
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guint8 digest[SHA256_DIGEST_LENGTH];
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gsize digest_len = sizeof(digest);
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guchar buffer[BUFSIZE];
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gsize i;
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checksum = g_checksum_new (G_CHECKSUM_SHA256);
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while ((bytes_read = g_input_stream_read (G_INPUT_STREAM (file_stream), buffer, sizeof (buffer), NULL, NULL)))
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{
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if (bytes_read == -1)
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{
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g_checksum_free (checksum);
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return FALSE;
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}
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g_checksum_update (checksum, buffer, bytes_read);
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}
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g_checksum_get_digest (checksum, digest, &digest_len);
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g_checksum_free (checksum);
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for (i = 0; i < SHA256_DIGEST_LENGTH; i++)
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{
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/* out_buf will be exactly SHA256_BUFFER_LENGTH including null */
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g_sprintf (out_buf + (i * 2), "%02x", digest[i]);
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}
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return TRUE;
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}
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static gboolean
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sha256_from_file (char *filename, char out_buf[])
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{
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GFileInputStream *file_stream;
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char *filename_fs;
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GFile *file;
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filename_fs = g_filename_from_utf8 (filename, -1, NULL, NULL, NULL);
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if (!filename_fs)
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{
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hexchat_printf (ph, "Checksum: Invalid filename (%s)\n", filename);
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return FALSE;
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}
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file = g_file_new_for_path (filename_fs);
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g_free (filename_fs);
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if (!file)
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{
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hexchat_printf (ph, "Checksum: Failed to open %s\n", filename);
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return FALSE;
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}
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if (!check_limit (file))
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{
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hexchat_printf (ph, "Checksum: %s is larger than size limit. You can increase it with /CHECKSUM SET.\n", filename);
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g_object_unref (file);
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return FALSE;
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}
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file_stream = g_file_read (file, NULL, NULL);
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if (!file_stream)
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{
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hexchat_printf (ph, "Checksum: Failed to read file %s\n", filename);
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g_object_unref (file);
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return FALSE;
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}
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if (!sha256_from_stream (file_stream, out_buf))
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{
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hexchat_printf (ph, "Checksum: Failed to generate checksum for %s\n", filename);
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g_object_unref (file_stream);
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g_object_unref (file);
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return FALSE;
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}
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g_object_unref (file_stream);
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g_object_unref (file);
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return TRUE;
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}
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static int
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dccrecv_cb (char *word[], void *userdata)
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{
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int result;
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struct stat buffer; /* buffer for storing file info */
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char sum[65]; /* buffer for checksum */
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const char *file;
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char *cfile;
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const char *dcc_completed_dir;
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char *filename, checksum[SHA256_BUFFER_LENGTH];
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if (hexchat_get_prefs (ph, "dcc_completed_dir", &file, NULL) == 1 && file[0] != 0)
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{
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cfile = g_strconcat (file, G_DIR_SEPARATOR_S, word[1], NULL);
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}
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else
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{
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cfile = g_strdup(word[2]);
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}
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result = stat (cfile, &buffer);
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if (result == 0) /* stat returns 0 on success */
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{
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if (buffer.st_size <= (unsigned long long) get_limit () * 1048576)
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{
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sha256_file (cfile, sum); /* file is the full filename even if completed dir set */
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/* try to print the checksum in the privmsg tab of the sender */
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/* Print in the privmsg tab of the sender */
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hexchat_set_context (ph, hexchat_find_context (ph, NULL, word[3]));
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hexchat_printf (ph, "SHA-256 checksum for %s (local): %s\n", word[1], sum);
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}
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if (hexchat_get_prefs (ph, "dcc_completed_dir", &dcc_completed_dir, NULL) == 1 && dcc_completed_dir[0] != '\0')
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filename = g_build_filename (dcc_completed_dir, word[1], NULL);
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else
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filename = g_strdup (word[2]);
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if (sha256_from_file (filename, checksum))
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{
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hexchat_set_context (ph, hexchat_find_context (ph, NULL, word[3]));
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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]);
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}
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}
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else
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{
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hexchat_printf (ph, "File access error!\n");
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hexchat_printf (ph, "SHA-256 checksum for %s (local): %s\n", word[1], checksum);
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}
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g_free (cfile);
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g_free (filename);
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return HEXCHAT_EAT_NONE;
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}
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static int
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dccoffer_cb (char *word[], void *userdata)
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{
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int result;
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struct stat buffer; /* buffer for storing file info */
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char sum[65]; /* buffer for checksum */
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char checksum[SHA256_BUFFER_LENGTH];
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result = stat (word[3], &buffer);
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if (result == 0) /* stat returns 0 on success */
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{
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if (buffer.st_size <= (unsigned long long) get_limit () * 1048576)
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{
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sha256_file (word[3], sum); /* word[3] is the full filename */
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hexchat_commandf (ph, "quote PRIVMSG %s :SHA-256 checksum for %s (remote): %s", word[2], word[1], sum);
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}
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else
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{
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/* Print in the privmsg tab of the receiver */
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hexchat_set_context (ph, hexchat_find_context (ph, NULL, word[3]));
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hexchat_printf (ph, "quote PRIVMSG %s :SHA-256 checksum for %s (remote): (size limit reached, no checksum calculated)", word[2], word[1]);
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}
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}
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else
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if (sha256_from_file (word[3], checksum))
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{
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hexchat_printf (ph, "File access error!\n");
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hexchat_commandf (ph, "quote PRIVMSG %s :SHA-256 checksum for %s (remote): %s", word[2], word[1], checksum);
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}
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return HEXCHAT_EAT_NONE;
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@ -246,7 +216,7 @@ checksum (char *word[], char *word_eol[], void *userdata)
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{
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if (!g_ascii_strcasecmp ("GET", word[2]))
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{
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print_limit ();
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hexchat_printf (ph, "File size limit for checksums: %d MiB", get_limit ());
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}
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else if (!g_ascii_strcasecmp ("SET", word[2]))
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{
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@ -259,7 +229,7 @@ checksum (char *word[], char *word_eol[], void *userdata)
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hexchat_printf (ph, " SET <filesize> - set the maximum file size (in MiB) to be hashed\n");
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}
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return HEXCHAT_EAT_NONE;
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return HEXCHAT_EAT_ALL;
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}
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int
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@ -277,7 +247,7 @@ hexchat_plugin_init (hexchat_plugin *plugin_handle, char **plugin_name, char **p
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hexchat_pluginpref_set_int (ph, "limit", DEFAULT_LIMIT);
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}
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hexchat_hook_command (ph, "CHECKSUM", HEXCHAT_PRI_NORM, checksum, "Usage: /CHECKSUM GET|SET", 0);
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hexchat_hook_command (ph, "CHECKSUM", HEXCHAT_PRI_NORM, checksum, "Usage: /CHECKSUM GET|SET", NULL);
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hexchat_hook_print (ph, "DCC RECV Complete", HEXCHAT_PRI_NORM, dccrecv_cb, NULL);
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hexchat_hook_print (ph, "DCC Offer", HEXCHAT_PRI_NORM, dccoffer_cb, NULL);
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