rework checksum plugin, add option for limiting file size
This commit is contained in:
berkeviktor@aol.com
parent
04faeae4f3
commit
522c6c9f16
@ -30,15 +30,26 @@
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#include <string.h>
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#include <malloc.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 "xchat-plugin.h"
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#define BUFSIZE 32768
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#define DEFAULT_MAX_HASH_SIZE 4294967296 /* default size is 4 GB */
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static xchat_plugin *ph; /* plugin handle */
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#ifndef snprintf
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#define snprintf _snprintf
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#endif
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#ifndef stat64
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#define stat64 _stat64
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#endif
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void
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static xchat_plugin *ph; /* plugin handle */
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static int config_fail; /* variable for config availability */
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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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{
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int i;
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@ -49,7 +60,7 @@ sha256_hash_string (unsigned char hash[SHA256_DIGEST_LENGTH], char outputBuffer[
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outputBuffer[64] = 0;
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}
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void
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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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@ -67,7 +78,7 @@ sha256 (char *string, char outputBuffer[65])
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outputBuffer[64] = 0;
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}
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int
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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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@ -103,30 +114,185 @@ sha256_file (char *path, char outputBuffer[65])
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return 0;
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}
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int
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static void
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init ()
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{
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/* check whether the config file exists, if it doesn't, try to create it */
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FILE * file_in;
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FILE * file_out;
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char buffer[1024];
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snprintf (buffer, sizeof (buffer), "%s/checksum.conf", xchat_get_info (ph, "xchatdirfs"));
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if ((file_in = fopen (buffer, "r")) == NULL)
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{
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if ((file_out = fopen (buffer, "w")) == NULL)
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{
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config_fail = 1;
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} else
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{
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config_fail = 0;
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fprintf (file_out, "%llu\n", DEFAULT_MAX_HASH_SIZE);
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}
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}
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fclose (file_in);
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fclose (file_out);
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}
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static unsigned long long
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get_max_hash_size ()
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{
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FILE * file_in;
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char buffer[1024];
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unsigned long long max_hash_size;
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if (config_fail)
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{
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return DEFAULT_MAX_HASH_SIZE;
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} else
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{
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snprintf (buffer, sizeof (buffer), "%s/checksum.conf", xchat_get_info (ph, "xchatdirfs"));
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file_in = fopen (buffer, "r");
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fscanf (file_in, "%llu", &max_hash_size);
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fclose (file_in);
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return max_hash_size;
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}
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}
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void
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print_size ()
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{
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xchat_printf (ph, "File size limit for checksums (in bytes): %llu", get_max_hash_size ());
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}
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static void
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increase_max_hash_size ()
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{
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unsigned long long size;
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FILE * file_out;
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char buffer[1024];
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if (config_fail)
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{
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xchat_printf (ph, "Config file is unavailable, defaulting to 4 GB");
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} else
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{
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size = get_max_hash_size ();
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if (size <= ULLONG_MAX/2)
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{
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size *= 2;
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}
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snprintf (buffer, sizeof (buffer), "%s/checksum.conf", xchat_get_info (ph, "xchatdirfs"));
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file_out = fopen (buffer, "w");
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fprintf (file_out, "%llu\n", size);
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fclose (file_out);
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xchat_printf (ph, "New file size limit for checksums (in bytes): %llu", size);
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}
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}
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static void
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decrease_max_hash_size ()
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{
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unsigned long long size;
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FILE * file_out;
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char buffer[1024];
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if (config_fail)
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{
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xchat_printf (ph, "Config file is unavailable, defaulting to 4 GB");
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} else
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{
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size = get_max_hash_size ();
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if (size >= 2)
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{
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size /= 2;
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}
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snprintf (buffer, sizeof (buffer), "%s/checksum.conf", xchat_get_info (ph, "xchatdirfs"));
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file_out = fopen (buffer, "w");
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fprintf (file_out, "%llu\n", size);
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fclose (file_out);
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xchat_printf (ph, "New file size limit for checksums (in bytes): %llu", size);
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}
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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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char sum[65];
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int result;
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struct stat64 buffer; /* buffer for storing file info */
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char sum[65]; /* buffer for checksum */
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sha256_file (word[2], sum);
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/* try to print the checksum in the privmsg tab of the sender */
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xchat_set_context (ph, xchat_find_context (ph, NULL, word[3]));
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xchat_printf (ph, "SHA-256 checksum for %s (local): %s\n", word[1], sum);
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result = stat64 (word[2], &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 <= get_max_hash_size ())
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{
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sha256_file (word[2], sum); /* word[2] is the full filename */
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/* try to print the checksum in the privmsg tab of the sender */
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xchat_set_context (ph, xchat_find_context (ph, NULL, word[3]));
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xchat_printf (ph, "SHA-256 checksum for %s (local): %s\n", word[1], sum);
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} else
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{
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xchat_set_context (ph, xchat_find_context (ph, NULL, word[3]));
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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]);
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}
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} else
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{
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xchat_printf (ph, "File access error");
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}
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return XCHAT_EAT_NONE;
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}
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int
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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 sum[65];
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int result;
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struct stat64 buffer; /* buffer for storing file info */
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char sum[65]; /* buffer for checksum */
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sha256_file (word[3], sum);
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xchat_commandf (ph, "quote PRIVMSG %s :SHA-256 checksum for %s (remote): %s", word[2], word[1], sum);
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result = stat64 (word[2], &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 <= get_max_hash_size ())
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{
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sha256_file (word[3], sum); /* word[3] is the full filename */
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xchat_commandf (ph, "quote PRIVMSG %s :SHA-256 checksum for %s (remote): %s", word[2], word[1], sum);
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} else
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{
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xchat_set_context (ph, xchat_find_context (ph, NULL, word[3]));
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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]);
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}
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} else
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{
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xchat_printf (ph, "File access error");
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}
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return XCHAT_EAT_NONE;
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}
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static void
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checksum (char *userdata[])
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{
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if (!stricmp("GET", userdata[2]))
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{
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print_size ();
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} else if (!stricmp("INC", userdata[2]))
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{
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increase_max_hash_size ();
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} else if (!stricmp("DEC", userdata[2]))
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{
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decrease_max_hash_size ();
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} else
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{
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xchat_printf (ph, "Usage: /CHECKSUM GET|INC|DEC");
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}
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}
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int
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xchat_plugin_init (xchat_plugin *plugin_handle, char **plugin_name, char **plugin_desc, char **plugin_version, char *arg)
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{
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@ -134,8 +300,11 @@ xchat_plugin_init (xchat_plugin *plugin_handle, char **plugin_name, char **plugi
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*plugin_name = "Checksum";
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*plugin_desc = "Calculate checksum for DCC file transfers";
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*plugin_version = "1.2";
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*plugin_version = "2.0";
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init ();
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xchat_hook_command (ph, "CHECKSUM", XCHAT_PRI_NORM, checksum, "Usage: /CHECKSUM GET|INC|DEC", 0);
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xchat_hook_print (ph, "DCC RECV Complete", XCHAT_PRI_NORM, dccrecv_cb, NULL);
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xchat_hook_print (ph, "DCC Offer", XCHAT_PRI_NORM, dccoffer_cb, NULL);
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