* authimage support

* broadened scode to trencaspammers


git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/pwntcha/trunk@424 92316355-f0b4-4df1-b90c-862c8a59935f

src/Makefile.am

@@ -8,6 +8,7 @@ pwntcha_SOURCES = \
     image.c \
     filters.c \
     common.h \
+    authimage.c \
     linuxfr.c \
     phpbb.c \
     scode.c \

src/authimage.c

@@ -0,0 +1,86 @@
+/*
+ * authimage.c: decode authimage captchas
+ * $Id$
+ *
+ * Copyright: (c) 2005 Sam Hocevar <sam@zoy.org>
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the Do What The Fuck You Want To
+ *   Public License as published by Banlu Kemiyatorn. See
+ *   http://sam.zoy.org/projects/COPYING.WTFPL for more details.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include <math.h>
+
+#include "config.h"
+#include "common.h"
+
+#define FONTNAME "share/font_authimage.png"
+static struct image *font = NULL;
+
+/* Main function */
+char *decode_authimage(struct image *img)
+{
+    char *all = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+    char *result;
+    struct image *tmp1, *tmp2, *tmp3;
+    int x, y, r, g, b, i;
+
+    if(!font)
+    {
+        font = image_load(FONTNAME);
+        if(!font)
+        {
+            fprintf(stderr, "cannot load font %s\n", FONTNAME);
+            exit(-1);
+        }
+    }
+
+    /* authimage captchas have 6 characters */
+    result = malloc(7 * sizeof(char));
+    memset(result, '\0', 7);
+
+    /* half the captchas are inverse video; we set them back to normal */
+    tmp1 = filter_scale(img, 2.0);
+    getpixel(img, 0, 0, &r, &g, &b);
+    tmp2 = filter_equalize(tmp1, r * 3 / 4);
+    tmp3 = filter_smooth(tmp2);
+
+    for(i = 0; i < 6; i++)
+    {
+        int mindiff = INT_MAX, minch = -1, ch;
+        for(ch = 0; ch < 36; ch++)
+        {
+            int diff = 0;
+            for(y = 0; y < 7; y++)
+            {
+                for(x = 0; x < 5; x++)
+                {
+                    int newx, newy, r2;
+                    newx = 35.0 + (x + 6 * i) * 218.0 / 34.0 + y * 5.0 / 6.0 + 0.5;
+                    newy = 33.0 - (x + 6 * i) * 18.0 / 34.0 + y * 42.0 / 6.0 + 0.5;
+                    getpixel(tmp3, newx, newy, &r, &g, &b);
+                    getpixel(font, x + 6 * ch, y, &r2, &g, &b);
+                    r = (r < 220) ? 0 : 255;
+                    diff += (r - r2) * (r - r2);
+                }
+            }
+            if(diff < mindiff)
+            {
+                mindiff = diff;
+                minch = ch;
+            }
+        }
+        result[i] = all[minch];
+    }
+
+    image_free(tmp3);
+    image_free(tmp2);
+    image_free(tmp1);
+
+    return result;
+}
+

src/common.h

@@ -21,6 +21,7 @@ struct image
 void dprintf(const char *fmt, ...);
 
 /* available CAPTCHA decoders */
+char *decode_authimage(struct image *img);
 char *decode_linuxfr(struct image *img);
 char *decode_phpbb(struct image *img);
 char *decode_scode(struct image *img);
@@ -42,6 +43,7 @@ int setpixel(struct image *img, int x, int y, int r, int g, int b);
 void filter_flood_fill(struct image *img, int x, int y, int r, int g, int b);
 struct image *filter_fill_holes(struct image *img);
 struct image *filter_dup(struct image *img);
+struct image *filter_scale(struct image *img, float ratio);
 struct image *filter_black_stuff(struct image *img);
 struct image *filter_detect_lines(struct image *img);
 struct image *filter_equalize(struct image *img, int threshold);

src/filters.c

@@ -70,6 +70,27 @@ struct image *filter_dup(struct image *img)
     return dst;
 }
 
+struct image *filter_scale(struct image *img, float ratio)
+{
+    struct image *dst;
+    int w, h, x, y;
+    int r, g, b;
+
+    w = ratio * img->width;
+    h = ratio * img->height;
+
+    dst = image_new(w, h);
+
+    for(y = 0; y < h; y++)
+        for(x = 0; x < w; x++)
+        {
+            getpixel(img, x / ratio, y / ratio, &r, &g, &b);
+            setpixel(dst, x, y, r, g, b);
+        }
+
+    return dst;
+}
+
 struct image *filter_fill_holes(struct image *img)
 {
     struct image *dst;

src/linuxfr.c

@@ -29,7 +29,7 @@ char *decode_linuxfr(struct image *img)
     char *result;
     struct image *tmp;
     int x, y, r, g, b, i, j, c;
-    int stats[40];
+    int *stats = malloc(img->height * sizeof(int));
 
     if(!font)
     {
@@ -145,6 +145,7 @@ char *decode_linuxfr(struct image *img)
     }
 
     image_free(tmp);
+    free(stats);
 
     if(strlen(result) != 7)
     {

src/main.c

@@ -124,6 +124,8 @@ int main(int argc, char *argv[])
 
         if(!strcmp(mode, "test"))
             result = decode_test(img);
+        else if(!strcmp(mode, "authimage"))
+            result = decode_authimage(img);
         else if(!strcmp(mode, "linuxfr"))
             result = decode_linuxfr(img);
         else if(!strcmp(mode, "phpbb"))
@@ -136,7 +138,12 @@ int main(int argc, char *argv[])
             result = decode_vbulletin(img);
         else
         {
-            if(img->width == 100 && img->height == 40)
+            if(img->width == 155 && img->height == 50)
+            {
+                dprintf("autodetected authimage captcha\n");
+                result = decode_authimage(img);
+            }
+            else if(img->width == 100 && img->height == 40 && count < 6)
             {
                 dprintf("autodetected linuxfr captcha\n");
                 result = decode_linuxfr(img);
@@ -146,10 +153,9 @@ int main(int argc, char *argv[])
                 dprintf("autodetected phpBB captcha\n");
                 result = decode_phpbb(img);
             }
-            else if((img->height == 25 || img->height == 30)
-                     && count < 10)
+            else if(img->height <= 40 && count < 10)
             {
-                dprintf("autodetected scode captcha\n");
+                dprintf("autodetected scode/trencaspammers captcha\n");
                 result = decode_scode(img);
             }
             else if(img->height == 69)

testsuite/Makefile.am

@@ -3,6 +3,7 @@ NULL =
 EXTRA_DIST = \
     README \
     auditor/auditor00.png auditor/auditor01.png auditor/auditor02.png auditor/auditor03.png auditor/auditor04.png auditor/auditor05.png auditor/auditor06.png auditor/auditor07.png auditor/auditor08.png auditor/auditor09.png auditor/auditor10.png auditor/auditor11.png auditor/auditor12.png auditor/auditor13.png auditor/auditor14.png auditor/auditor15.png auditor/auditor16.png auditor/auditor17.png auditor/auditor18.png auditor/auditor19.png auditor/auditor20.png auditor/auditor21.png auditor/auditor22.png auditor/auditor23.png auditor/auditor24.png auditor/auditor25.png auditor/auditor26.png auditor/auditor27.png auditor/auditor28.png auditor/auditor29.png auditor/auditor30.png auditor/auditor31.png auditor/auditor32.png auditor/auditor33.png auditor/auditor34.png auditor/auditor35.png auditor/auditor36.png auditor/auditor37.png auditor/auditor38.png auditor/auditor39.png auditor/auditor40.png auditor/auditor41.png auditor/auditor42.png auditor/auditor43.png auditor/auditor44.png auditor/auditor45.png auditor/auditor46.png auditor/auditor47.png auditor/auditor48.png auditor/auditor49.png auditor/auditor50.png auditor/auditor51.png auditor/auditor52.png auditor/auditor53.png auditor/auditor54.png auditor/auditor55.png auditor/auditor56.png auditor/auditor57.png auditor/auditor58.png auditor/auditor59.png auditor/auditor60.png auditor/auditor61.png auditor/auditor62.png auditor/auditor63.png auditor/auditor64.png auditor/auditor65.png auditor/auditor66.png auditor/auditor67.png auditor/auditor68.png auditor/auditor69.png auditor/auditor70.png auditor/auditor71.png auditor/auditor72.png auditor/auditor73.png auditor/auditor74.png auditor/auditor75.png auditor/auditor76.png auditor/auditor77.png auditor/auditor78.png auditor/auditor79.png auditor/auditor80.png auditor/auditor81.png auditor/auditor82.png auditor/auditor83.png auditor/auditor84.png auditor/auditor85.png auditor/auditor86.png auditor/auditor87.png auditor/auditor88.png auditor/auditor89.png auditor/auditor90.png auditor/auditor91.png auditor/auditor92.png auditor/auditor93.png auditor/auditor94.png auditor/auditor95.png auditor/auditor96.png auditor/auditor97.png auditor/auditor98.png auditor/auditor99.png auditor/control.txt \
+    authimage/authimage00.jpeg authimage/authimage01.jpeg authimage/authimage02.jpeg authimage/authimage03.jpeg authimage/authimage04.jpeg authimage/authimage05.jpeg authimage/authimage06.jpeg authimage/authimage07.jpeg authimage/authimage08.jpeg authimage/authimage09.jpeg authimage/authimage10.jpeg authimage/authimage11.jpeg authimage/authimage12.jpeg authimage/authimage13.jpeg authimage/authimage14.jpeg authimage/authimage15.jpeg authimage/authimage16.jpeg authimage/authimage17.jpeg authimage/authimage18.jpeg authimage/authimage19.jpeg authimage/authimage20.jpeg authimage/authimage21.jpeg authimage/authimage22.jpeg authimage/authimage23.jpeg authimage/authimage24.jpeg authimage/authimage25.jpeg authimage/authimage26.jpeg authimage/authimage27.jpeg authimage/authimage28.jpeg authimage/authimage29.jpeg authimage/authimage30.jpeg authimage/authimage31.jpeg authimage/authimage32.jpeg authimage/authimage33.jpeg authimage/authimage34.jpeg authimage/authimage35.jpeg authimage/authimage36.jpeg authimage/authimage37.jpeg authimage/authimage38.jpeg authimage/authimage39.jpeg authimage/authimage40.jpeg authimage/authimage41.jpeg authimage/authimage42.jpeg authimage/authimage43.jpeg authimage/authimage44.jpeg authimage/authimage45.jpeg authimage/authimage46.jpeg authimage/authimage47.jpeg authimage/authimage48.jpeg authimage/authimage49.jpeg authimage/authimage50.jpeg authimage/authimage51.jpeg authimage/authimage52.jpeg authimage/authimage53.jpeg authimage/authimage54.jpeg authimage/authimage55.jpeg authimage/authimage56.jpeg authimage/authimage57.jpeg authimage/authimage58.jpeg authimage/authimage59.jpeg authimage/authimage60.jpeg authimage/authimage61.jpeg authimage/authimage62.jpeg authimage/authimage63.jpeg authimage/authimage64.jpeg authimage/authimage65.jpeg authimage/authimage66.jpeg authimage/authimage67.jpeg authimage/authimage68.jpeg authimage/authimage69.jpeg authimage/authimage70.jpeg authimage/authimage71.jpeg authimage/authimage72.jpeg authimage/authimage73.jpeg authimage/authimage74.jpeg authimage/authimage75.jpeg authimage/authimage76.jpeg authimage/authimage77.jpeg authimage/authimage78.jpeg authimage/authimage79.jpeg authimage/authimage80.jpeg authimage/authimage81.jpeg authimage/authimage82.jpeg authimage/authimage83.jpeg authimage/authimage84.jpeg authimage/authimage85.jpeg authimage/authimage86.jpeg authimage/authimage87.jpeg authimage/authimage88.jpeg authimage/authimage89.jpeg authimage/authimage90.jpeg authimage/authimage91.jpeg authimage/authimage92.jpeg authimage/authimage93.jpeg authimage/authimage94.jpeg authimage/authimage95.jpeg authimage/authimage96.jpeg authimage/authimage97.jpeg authimage/authimage98.jpeg authimage/authimage99.jpeg authimage/control.txt \
     cfxcaptcha/cvxcaptcha00.jpeg cfxcaptcha/cvxcaptcha01.jpeg cfxcaptcha/cvxcaptcha02.jpeg cfxcaptcha/cvxcaptcha03.jpeg cfxcaptcha/cvxcaptcha04.jpeg cfxcaptcha/cvxcaptcha05.jpeg cfxcaptcha/cvxcaptcha06.jpeg cfxcaptcha/cvxcaptcha07.jpeg cfxcaptcha/cvxcaptcha08.jpeg cfxcaptcha/cvxcaptcha09.jpeg cfxcaptcha/cvxcaptcha10.jpeg cfxcaptcha/cvxcaptcha11.jpeg cfxcaptcha/cvxcaptcha12.jpeg cfxcaptcha/cvxcaptcha13.jpeg cfxcaptcha/cvxcaptcha14.jpeg cfxcaptcha/cvxcaptcha15.jpeg cfxcaptcha/cvxcaptcha16.jpeg cfxcaptcha/cvxcaptcha17.jpeg cfxcaptcha/cvxcaptcha18.jpeg cfxcaptcha/cvxcaptcha19.jpeg cfxcaptcha/cvxcaptcha20.jpeg cfxcaptcha/cvxcaptcha21.jpeg cfxcaptcha/cvxcaptcha22.jpeg cfxcaptcha/cvxcaptcha23.jpeg cfxcaptcha/cvxcaptcha24.jpeg cfxcaptcha/cvxcaptcha25.jpeg cfxcaptcha/cvxcaptcha26.jpeg cfxcaptcha/cvxcaptcha27.jpeg cfxcaptcha/cvxcaptcha28.jpeg cfxcaptcha/cvxcaptcha29.jpeg cfxcaptcha/cvxcaptcha30.jpeg cfxcaptcha/cvxcaptcha31.jpeg cfxcaptcha/cvxcaptcha32.jpeg cfxcaptcha/cvxcaptcha33.jpeg cfxcaptcha/cvxcaptcha34.jpeg cfxcaptcha/cvxcaptcha35.jpeg cfxcaptcha/cvxcaptcha36.jpeg cfxcaptcha/cvxcaptcha37.jpeg cfxcaptcha/cvxcaptcha38.jpeg cfxcaptcha/cvxcaptcha39.jpeg cfxcaptcha/cvxcaptcha40.jpeg cfxcaptcha/cvxcaptcha41.jpeg cfxcaptcha/cvxcaptcha42.jpeg cfxcaptcha/cvxcaptcha43.jpeg cfxcaptcha/cvxcaptcha44.jpeg cfxcaptcha/cvxcaptcha45.jpeg cfxcaptcha/cvxcaptcha46.jpeg cfxcaptcha/cvxcaptcha47.jpeg cfxcaptcha/cvxcaptcha48.jpeg cfxcaptcha/cvxcaptcha49.jpeg cfxcaptcha/cvxcaptcha50.jpeg cfxcaptcha/cvxcaptcha51.jpeg cfxcaptcha/cvxcaptcha52.jpeg cfxcaptcha/cvxcaptcha53.jpeg cfxcaptcha/cvxcaptcha54.jpeg cfxcaptcha/cvxcaptcha55.jpeg cfxcaptcha/cvxcaptcha56.jpeg cfxcaptcha/cvxcaptcha57.jpeg cfxcaptcha/cvxcaptcha58.jpeg cfxcaptcha/cvxcaptcha59.jpeg cfxcaptcha/cvxcaptcha60.jpeg cfxcaptcha/cvxcaptcha61.jpeg cfxcaptcha/cvxcaptcha62.jpeg cfxcaptcha/cvxcaptcha63.jpeg cfxcaptcha/cvxcaptcha64.jpeg cfxcaptcha/cvxcaptcha65.jpeg cfxcaptcha/cvxcaptcha66.jpeg cfxcaptcha/cvxcaptcha67.jpeg cfxcaptcha/cvxcaptcha68.jpeg cfxcaptcha/cvxcaptcha69.jpeg cfxcaptcha/cvxcaptcha70.jpeg cfxcaptcha/cvxcaptcha71.jpeg cfxcaptcha/cvxcaptcha72.jpeg cfxcaptcha/cvxcaptcha73.jpeg cfxcaptcha/cvxcaptcha74.jpeg cfxcaptcha/cvxcaptcha75.jpeg cfxcaptcha/cvxcaptcha76.jpeg cfxcaptcha/cvxcaptcha77.jpeg cfxcaptcha/cvxcaptcha78.jpeg cfxcaptcha/cvxcaptcha79.jpeg cfxcaptcha/cvxcaptcha80.jpeg cfxcaptcha/cvxcaptcha81.jpeg cfxcaptcha/cvxcaptcha82.jpeg cfxcaptcha/cvxcaptcha83.jpeg cfxcaptcha/cvxcaptcha84.jpeg cfxcaptcha/cvxcaptcha85.jpeg cfxcaptcha/cvxcaptcha86.jpeg cfxcaptcha/cvxcaptcha87.jpeg cfxcaptcha/cvxcaptcha88.jpeg cfxcaptcha/cvxcaptcha89.jpeg cfxcaptcha/cvxcaptcha90.jpeg cfxcaptcha/cvxcaptcha91.jpeg cfxcaptcha/cvxcaptcha92.jpeg cfxcaptcha/cvxcaptcha93.jpeg cfxcaptcha/cvxcaptcha94.jpeg cfxcaptcha/cvxcaptcha95.jpeg cfxcaptcha/cvxcaptcha96.jpeg cfxcaptcha/cvxcaptcha97.jpeg cfxcaptcha/cvxcaptcha98.jpeg cfxcaptcha/cvxcaptcha99.jpeg \
     icq/icq00.jpeg icq/icq01.jpeg icq/icq02.jpeg icq/icq03.jpeg icq/icq04.jpeg icq/icq05.jpeg icq/icq06.jpeg icq/icq07.jpeg icq/icq08.jpeg icq/icq09.jpeg icq/icq10.jpeg icq/icq11.jpeg icq/icq12.jpeg icq/icq13.jpeg icq/icq14.jpeg icq/icq15.jpeg icq/icq16.jpeg icq/icq17.jpeg icq/icq18.jpeg icq/icq19.jpeg icq/icq20.jpeg icq/icq21.jpeg icq/icq22.jpeg icq/icq23.jpeg icq/icq24.jpeg icq/icq25.jpeg icq/icq26.jpeg icq/icq27.jpeg icq/icq28.jpeg icq/icq29.jpeg icq/icq30.jpeg icq/icq31.jpeg icq/icq32.jpeg icq/icq33.jpeg icq/icq34.jpeg icq/icq35.jpeg icq/icq36.jpeg icq/icq37.jpeg icq/icq38.jpeg icq/icq39.jpeg icq/icq40.jpeg icq/icq41.jpeg icq/icq42.jpeg icq/icq43.jpeg icq/icq44.jpeg icq/icq45.jpeg icq/icq46.jpeg icq/icq47.jpeg icq/icq48.jpeg icq/icq49.jpeg icq/icq50.jpeg icq/icq51.jpeg icq/icq52.jpeg icq/icq53.jpeg icq/icq54.jpeg icq/icq55.jpeg icq/icq56.jpeg icq/icq57.jpeg icq/icq58.jpeg icq/icq59.jpeg icq/icq60.jpeg icq/icq61.jpeg icq/icq62.jpeg icq/icq63.jpeg icq/icq64.jpeg icq/icq65.jpeg icq/icq66.jpeg icq/icq67.jpeg icq/icq68.jpeg icq/icq69.jpeg icq/icq70.jpeg icq/icq71.jpeg icq/icq72.jpeg icq/icq73.jpeg icq/icq74.jpeg icq/icq75.jpeg icq/icq76.jpeg icq/icq77.jpeg icq/icq78.jpeg icq/icq79.jpeg icq/icq80.jpeg icq/icq81.jpeg icq/icq82.jpeg icq/icq83.jpeg icq/icq84.jpeg icq/icq85.jpeg icq/icq86.jpeg icq/icq87.jpeg icq/icq88.jpeg icq/icq89.jpeg icq/icq90.jpeg icq/icq91.jpeg icq/icq92.jpeg icq/icq93.jpeg icq/icq94.jpeg icq/icq95.jpeg icq/icq96.jpeg icq/icq97.jpeg icq/icq98.jpeg icq/icq99.jpeg \
     linuxfr/linuxfr00.png linuxfr/linuxfr01.png linuxfr/linuxfr02.png linuxfr/linuxfr03.png linuxfr/linuxfr04.png linuxfr/linuxfr05.png linuxfr/linuxfr06.png linuxfr/linuxfr07.png linuxfr/linuxfr08.png linuxfr/linuxfr09.png linuxfr/linuxfr10.png linuxfr/linuxfr11.png linuxfr/linuxfr12.png linuxfr/linuxfr13.png linuxfr/linuxfr14.png linuxfr/linuxfr15.png linuxfr/linuxfr16.png linuxfr/linuxfr17.png linuxfr/linuxfr18.png linuxfr/linuxfr19.png linuxfr/linuxfr20.png linuxfr/linuxfr21.png linuxfr/linuxfr22.png linuxfr/linuxfr23.png linuxfr/linuxfr24.png linuxfr/linuxfr25.png linuxfr/linuxfr26.png linuxfr/linuxfr27.png linuxfr/linuxfr28.png linuxfr/linuxfr29.png linuxfr/linuxfr30.png linuxfr/linuxfr31.png linuxfr/linuxfr32.png linuxfr/linuxfr33.png linuxfr/linuxfr34.png linuxfr/linuxfr35.png linuxfr/linuxfr36.png linuxfr/linuxfr37.png linuxfr/linuxfr38.png linuxfr/linuxfr39.png linuxfr/linuxfr40.png linuxfr/linuxfr41.png linuxfr/linuxfr42.png linuxfr/linuxfr43.png linuxfr/linuxfr44.png linuxfr/linuxfr45.png linuxfr/linuxfr46.png linuxfr/linuxfr47.png linuxfr/linuxfr48.png linuxfr/linuxfr49.png linuxfr/linuxfr50.png linuxfr/linuxfr51.png linuxfr/linuxfr52.png linuxfr/linuxfr53.png linuxfr/linuxfr54.png linuxfr/linuxfr55.png linuxfr/linuxfr56.png linuxfr/linuxfr57.png linuxfr/linuxfr58.png linuxfr/linuxfr59.png linuxfr/linuxfr60.png linuxfr/linuxfr61.png linuxfr/linuxfr62.png linuxfr/linuxfr63.png linuxfr/linuxfr64.png linuxfr/linuxfr65.png linuxfr/linuxfr66.png linuxfr/linuxfr67.png linuxfr/linuxfr68.png linuxfr/linuxfr69.png linuxfr/linuxfr70.png linuxfr/linuxfr71.png linuxfr/linuxfr72.png linuxfr/linuxfr73.png linuxfr/linuxfr74.png linuxfr/linuxfr75.png linuxfr/linuxfr76.png linuxfr/linuxfr77.png linuxfr/linuxfr78.png linuxfr/linuxfr79.png linuxfr/linuxfr80.png linuxfr/linuxfr81.png linuxfr/linuxfr82.png linuxfr/linuxfr83.png linuxfr/linuxfr84.png linuxfr/linuxfr85.png linuxfr/linuxfr86.png linuxfr/linuxfr87.png linuxfr/linuxfr88.png linuxfr/linuxfr89.png linuxfr/linuxfr90.png linuxfr/linuxfr91.png linuxfr/linuxfr92.png linuxfr/linuxfr93.png linuxfr/linuxfr94.png linuxfr/linuxfr95.png linuxfr/linuxfr96.png linuxfr/linuxfr97.png linuxfr/linuxfr98.png linuxfr/linuxfr99.png linuxfr/control.txt \

testsuite/README

@@ -3,6 +3,9 @@ Repository of captchas collected on the web.
 auditor
 -------
 
+authimage
+---------
+
 cfxcaptcha
 ----------
 http://www.emerle.net/programming/display.cfm/t/cfx_captcha