checksum: Move checksum operation to a thread
This commit is contained in:
Patrick Griffis
parent
8cf2aa5586
commit
36f2528b78
@ -13,7 +13,7 @@ gnome = import('gnome')
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cc = meson.get_compiler('c')
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libgio_dep = dependency('gio-2.0', version: '>= 2.34.0')
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libgio_dep = dependency('gio-2.0', version: '>= 2.36.0')
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libgmodule_dep = dependency('gmodule-2.0')
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libcanberra_dep = dependency('libcanberra', version: '>= 0.22',
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@ -47,8 +47,8 @@ config_h.set('G_DISABLE_SINGLE_INCLUDES', true)
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config_h.set('GTK_DISABLE_DEPRECATED', true)
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config_h.set('GTK_DISABLE_SINGLE_INCLUDES', true)
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config_h.set('GDK_PIXBUF_DISABLE_SINGLE_INCLUDES', true)
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config_h.set('GLIB_VERSION_MAX_ALLOWED', 'GLIB_VERSION_2_34')
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config_h.set('GLIB_VERSION_MIN_REQUIRED', 'GLIB_VERSION_2_34')
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config_h.set('GLIB_VERSION_MAX_ALLOWED', 'GLIB_VERSION_2_36')
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config_h.set('GLIB_VERSION_MIN_REQUIRED', 'GLIB_VERSION_2_36')
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# Detected features
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config_h.set('HAVE_MEMRCHR', cc.has_function('memrchr'))
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@ -22,218 +22,152 @@
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#include "config.h"
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#include <stdlib.h>
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#include <glib.h>
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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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static char version[] = "4.0";
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static void
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set_limit (char *size)
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print_sha256_result (hexchat_context *ctx, gboolean send_message, const char *checksum, const char *filename, GError *error)
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{
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int limit = atoi (size);
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/* Context may have been destroyed. */
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/* FIXME: This could still send the PRIVMSG even if the context was closed. */
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if (!hexchat_set_context (ph, ctx))
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return;
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if (limit > 0 && limit < INT_MAX)
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{
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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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if (error)
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hexchat_printf (ph, "Failed to create checksum for %s: %s", filename, error->message);
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else if (send_message)
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hexchat_commandf (ph, "quote PRIVMSG %s :SHA-256 checksum for %s (remote): %s", hexchat_get_info (ph, "channel"), filename, checksum);
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else
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{
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hexchat_printf (ph, "Checksum: Invalid input!\n");
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}
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hexchat_printf (ph, "SHA-256 checksum for %s (local): %s\n", filename, checksum);
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}
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static int
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get_limit (void)
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/* TODO: We could put more info in task data and share the same callback. */
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static void
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on_received_file_sha256_complete (GFile *file, GAsyncResult *result, gpointer user_data)
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{
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int size = hexchat_pluginpref_get_int (ph, "limit");
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hexchat_context *ctx = user_data;
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GError *error = NULL;
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char *sha256 = NULL;
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const char *filename = g_task_get_task_data (G_TASK (result));
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if (size <= 0 || size >= INT_MAX)
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return DEFAULT_LIMIT;
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else
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return size;
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sha256 = g_task_propagate_pointer (G_TASK (result), &error);
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print_sha256_result (ctx, FALSE, sha256, filename, error);
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g_free (sha256);
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g_clear_error (&error);
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}
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static gboolean
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check_limit (GFile *file)
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static void
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on_sent_file_sha256_complete (GFile *file, GAsyncResult *result, gpointer user_data)
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{
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GFileInfo *file_info;
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goffset file_size;
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hexchat_context *ctx = user_data;
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GError *error = NULL;
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char *sha256 = NULL;
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const char *filename = g_task_get_task_data (G_TASK (result));
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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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sha256 = g_task_propagate_pointer (G_TASK (result), &error);
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print_sha256_result (ctx, TRUE, sha256, filename, error);
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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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g_free (sha256);
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g_clear_error (&error);
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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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static void
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thread_sha256_file (GTask *task, GFile *file, gpointer task_data, GCancellable *cancellable)
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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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GFileInputStream *istream;
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guint8 buffer[32768];
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GError *error = NULL;
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gssize ret;
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istream = g_file_read (file, cancellable, &error);
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if (error) {
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g_task_return_error (task, error);
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return;
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}
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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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while ((ret = g_input_stream_read (G_INPUT_STREAM (istream), buffer, sizeof(buffer), cancellable, &error)) > 0)
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g_checksum_update (checksum, buffer, ret);
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g_checksum_update (checksum, buffer, bytes_read);
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if (error) {
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g_checksum_free (checksum);
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g_task_return_error (task, error);
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return;
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}
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g_checksum_get_digest (checksum, digest, &digest_len);
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g_task_return_pointer (task, g_strdup (g_checksum_get_string (checksum)), g_free);
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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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GTask *task;
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char *filename_fs;
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GFile *file;
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hexchat_context *ctx;
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const char *dcc_completed_dir;
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char *filename, checksum[SHA256_BUFFER_LENGTH];
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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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char *filename;
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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_printf (ph, "SHA-256 checksum for %s (local): %s\n", word[1], checksum);
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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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hexchat_printf (ph, "Checksum: Invalid filename (%s)\n", filename);
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g_free (filename);
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return HEXCHAT_EAT_NONE;
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}
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g_free (filename);
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/* Print in the privmsg tab of the sender */
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ctx = hexchat_find_context (ph, NULL, word[3]);
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file = g_file_new_for_path (filename_fs);
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task = g_task_new (file, NULL, (GAsyncReadyCallback) on_received_file_sha256_complete, ctx);
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g_task_set_task_data (task, filename, g_free);
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g_task_run_in_thread (task, (GTaskThreadFunc) thread_sha256_file);
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g_free (filename_fs);
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g_object_unref (file);
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g_object_unref (task);
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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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char checksum[SHA256_BUFFER_LENGTH];
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GFile *file;
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GTask *task;
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hexchat_context *ctx;
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char *filename;
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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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ctx = hexchat_find_context (ph, NULL, word[3]);
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if (sha256_from_file (word[3], checksum))
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{
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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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filename = g_strdup (word[3]);
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file = g_file_new_for_path (filename);
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task = g_task_new (file, NULL, (GAsyncReadyCallback) on_sent_file_sha256_complete, ctx);
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g_task_set_task_data (task, filename, g_free);
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g_task_run_in_thread (task, (GTaskThreadFunc) thread_sha256_file);
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g_object_unref (file);
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g_object_unref (task);
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return HEXCHAT_EAT_NONE;
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}
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static int
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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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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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set_limit (word[3]);
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}
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else
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{
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hexchat_printf (ph, "Usage: /CHECKSUM GET|SET\n");
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hexchat_printf (ph, " GET - print the maximum file size (in MiB) to be hashed\n");
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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_ALL;
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}
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int
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hexchat_plugin_init (hexchat_plugin *plugin_handle, char **plugin_name, char **plugin_desc, char **plugin_version, char *arg)
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{
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@ -243,13 +177,6 @@ hexchat_plugin_init (hexchat_plugin *plugin_handle, char **plugin_name, char **p
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*plugin_desc = desc;
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*plugin_version = version;
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/* this is required for the very first run */
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if (hexchat_pluginpref_get_int (ph, "limit") == -1)
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{
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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", 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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