-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathCaptchaGenerator.cpp
More file actions
104 lines (91 loc) · 3.74 KB
/
CaptchaGenerator.cpp
File metadata and controls
104 lines (91 loc) · 3.74 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
//this file is part of eMule
//Copyright (C)2002-2008 Merkur ( strEmail.Format("%s@%s", "devteam", "emule-project.net") / http://www.emule-project.net )
//
//This program is free software; you can redistribute it and/or
//modify it under the terms of the GNU General Public License
//as published by the Free Software Foundation; either
//version 2 of the License, or (at your option) any later version.
//
//This program is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//GNU General Public License for more details.
//
//You should have received a copy of the GNU General Public License
//along with this program; if not, write to the Free Software
//Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#include "StdAfx.h"
#include "CaptchaGenerator.h"
#include "CxImage/xImage.h"
#include "OtherFunctions.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
#define LETTERSIZE 32
#define CROWDEDSIZE 18
// fairly simply captcha generator, might be improved is spammers think its really worth it solving captchas on eMule
static const char schCaptchaContent[34] = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L'
, 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '1', '2', '3', '4', '5', '6', '7', '8', '9'};
CCaptchaGenerator::CCaptchaGenerator(uint32 nLetterCount)
{
m_pimgCaptcha = NULL;
ReGenerateCaptcha(nLetterCount);
}
CCaptchaGenerator::~CCaptchaGenerator(void)
{
Clear();
}
void CCaptchaGenerator::ReGenerateCaptcha(uint32 nLetterCount)
{
Clear();
CxImage* pimgResult = new CxImage(nLetterCount > 1 ? (LETTERSIZE + (nLetterCount-1)*CROWDEDSIZE) : LETTERSIZE, 32, 1, CXIMAGE_FORMAT_BMP);
pimgResult->SetPaletteColor(0, 255, 255, 255);
pimgResult->SetPaletteColor(1, 0, 0, 0, 0);
pimgResult->Clear();
CxImage imgBlank(LETTERSIZE, LETTERSIZE, 1, CXIMAGE_FORMAT_BMP);
imgBlank.SetPaletteColor(0, 255, 255, 255);
imgBlank.SetPaletteColor(1, 0, 0, 0, 0);
imgBlank.Clear();
for (uint32 i = 0; i < nLetterCount; i++) {
CxImage imgLetter(imgBlank);
CString strLetter(schCaptchaContent[GetRandomUInt16() % ARRSIZE(schCaptchaContent)]);
m_strCaptchaText += strLetter;
uint16 nRandomSize = GetRandomUInt16() % 10;
uint16 nRandomOffset = 3 + GetRandomUInt16() % 11;
imgLetter.DrawString(NULL, nRandomOffset, 32, strLetter, imgLetter.RGBtoRGBQUAD(RGB(0, 0, 0)), _T("Arial"), 40 - nRandomSize, 1000);
//imgLetter.DrawTextA(NULL, nRandomOffset, 32, strLetter, imgLetter.RGBtoRGBQUAD(RGB(0, 0, 0)), "Arial", 40 - nRandomSize, 1000);
float fRotate = (float)(35 - (GetRandomUInt16() % 70));
imgLetter.Rotate2(fRotate, NULL, CxImage::IM_BILINEAR, CxImage::OM_BACKGROUND, 0, false, true);
uint32 nOffset = i * CROWDEDSIZE;
ASSERT( imgLetter.GetHeight() == pimgResult->GetHeight() && pimgResult->GetWidth() >= nOffset + imgLetter.GetWidth() );
for (uint32 j = 0; j < imgLetter.GetHeight(); j++)
for (uint32 k = 0; k < imgLetter.GetWidth(); k++)
if (pimgResult->GetPixelIndex(nOffset + k, j) != 1)
pimgResult->SetPixelIndex(nOffset + k, j, imgLetter.GetPixelIndex(k, j));
}
pimgResult->Jitter(1);
//pimgResult->Save("D:\\CaptchaTest.bmp", CXIMAGE_FORMAT_BMP);
m_pimgCaptcha = pimgResult;
}
void CCaptchaGenerator::Clear(){
delete m_pimgCaptcha;
m_pimgCaptcha = NULL;
m_strCaptchaText = _T("");
}
bool CCaptchaGenerator::WriteCaptchaImage(CFileDataIO& file)
{
if (m_pimgCaptcha == NULL)
return false;
BYTE* pbyBuffer = NULL;
long ulSize = 0;
if (m_pimgCaptcha->Encode(pbyBuffer, ulSize, CXIMAGE_FORMAT_BMP)){
file.Write(pbyBuffer, ulSize);
ASSERT( ulSize > 100 && ulSize < 1000 );
free(pbyBuffer);
return true;
}
else
return false;
}