diff options
Diffstat (limited to 'plugins')
| -rw-r--r-- | plugins/checksum/checksum.c | 274 |
1 files changed, 122 insertions, 152 deletions
diff --git a/plugins/checksum/checksum.c b/plugins/checksum/checksum.c index 6ace8543..7e2d8a4e 100644 --- a/plugins/checksum/checksum.c +++ b/plugins/checksum/checksum.c @@ -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); |