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path: root/src/gui/guiVolumeChange.cpp
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/*
Part of Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
Copyright (C) 2013 Ciaran Gultnieks <ciaran@ciarang.com>
Copyright (C) 2013 RealBadAngel, Maciej Kasatkin <mk@realbadangel.pl>

Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#include "guiVolumeChange.h"
#include "debug.h"
#include "guiButton.h"
#include "serialization.h"
#include <string>
#include <IGUICheckBox.h>
#include <IGUIButton.h>
#include <IGUIScrollBar.h>
#include <IGUIStaticText.h>
#include <IGUIFont.h>
#include "settings.h"

#include "gettext.h"

const int ID_soundText = 263;
const int ID_soundExitButton = 264;
const int ID_soundSlider = 265;
const int ID_soundMuteButton = 266;

GUIVolumeChange::GUIVolumeChange(gui::IGUIEnvironment* env,
		gui::IGUIElement* parent, s32 id,
		IMenuManager *menumgr
):
	GUIModalMenu(env, parent, id, menumgr)
{
}

GUIVolumeChange::~GUIVolumeChange()
{
	removeChildren();
}

void GUIVolumeChange::removeChildren()
{
	if (gui::IGUIElement *e = getElementFromId(ID_soundText))
		e->remove();

	if (gui::IGUIElement *e = getElementFromId(ID_soundExitButton))
		e->remove();

	if (gui::IGUIElement *e = getElementFromId(ID_soundSlider))
		e->remove();

	if (gui::IGUIElement *e = getElementFromId(ID_soundMuteButton))
		e->remove();
}

void GUIVolumeChange::regenerateGui(v2u32 screensize)
{
	/*
		Remove stuff
	*/
	removeChildren();
	/*
		Calculate new sizes and positions
	*/
	const float s = m_gui_scale;
	DesiredRect = core::rect<s32>(
		screensize.X / 2 - 380 * s / 2,
		screensize.Y / 2 - 200 * s / 2,
		screensize.X / 2 + 380 * s / 2,
		screensize.Y / 2 + 200 * s / 2
	);
	recalculateAbsolutePosition(false);

	v2s32 size = DesiredRect.getSize();
	int volume = (int)(g_settings->getFloat("sound_volume") * 100);

	/*
		Add stuff
	*/
	{
		core::rect<s32> rect(0, 0, 160 * s, 20 * s);
		rect = rect + v2s32(size.X / 2 - 80 * s, size.Y / 2 - 70 * s);

		const wchar_t *text = wgettext("Sound Volume: ");
		core::stringw volume_text = text;
		delete [] text;

		volume_text += core::stringw(volume) + core::stringw("%");
		Environment->addStaticText(volume_text.c_str(), rect, false,
				true, this, ID_soundText);
	}
	{
		core::rect<s32> rect(0, 0, 80 * s, 30 * s);
		rect = rect + v2s32(size.X / 2 - 80 * s / 2, size.Y / 2 + 55 * s);
		const wchar_t *text = wgettext("Exit");
		GUIButton::addButton(Environment, rect, this, ID_soundExitButton, text);
		delete[] text;
	}
	{
		core::rect<s32> rect(0, 0, 300 * s, 20 * s);
		rect = rect + v2s32(size.X / 2 - 150 * s, size.Y / 2);
		gui::IGUIScrollBar *e = Environment->addScrollBar(true,
			rect, this, ID_soundSlider);
		e->setMax(100);
		e->setPos(volume);
	}
	{
		core::rect<s32> rect(0, 0, 160 * s, 20 * s);
		rect = rect + v2s32(size.X / 2 - 80 * s, size.Y / 2 - 35 * s);
		const wchar_t *text = wgettext("Muted");
		Environment->addCheckBox(g_settings->getBool("mute_sound"), rect, this,
				ID_soundMuteButton, text);
		delete[] text;
	}
}

void GUIVolumeChange::drawMenu()
{
	gui::IGUISkin* skin = Environment->getSkin();
	if (!skin)
		return;
	video::IVideoDriver* driver = Environment->getVideoDriver();
	video::SColor bgcolor(140, 0, 0, 0);
	driver->draw2DRectangle(bgcolor, AbsoluteRect, &AbsoluteClippingRect);
	gui::IGUIElement::draw();
}

bool GUIVolumeChange::OnEvent(const SEvent& event)
{
	if (event.EventType == EET_KEY_INPUT_EVENT) {
		if (event.KeyInput.Key == KEY_ESCAPE && event.KeyInput.PressedDown) {
			quitMenu();
			return true;
		}

		if (event.KeyInput.Key == KEY_RETURN && event.KeyInput.PressedDown) {
			quitMenu();
			return true;
		}
	} else if (event.EventType == EET_GUI_EVENT) {
		if (event.GUIEvent.EventType == gui::EGET_CHECKBOX_CHANGED) {
			gui::IGUIElement *e = getElementFromId(ID_soundMuteButton);
			if (e != NULL && e->getType() == gui::EGUIET_CHECK_BOX) {
				g_settings->setBool("mute_sound", ((gui::IGUICheckBox*)e)->isChecked());
			}

			Environment->setFocus(this);
			return true;
		}

		if (event.GUIEvent.EventType == gui::EGET_BUTTON_CLICKED) {
			if (event.GUIEvent.Caller->getID() == ID_soundExitButton) {
				quitMenu();
				return true;
			}
			Environment->setFocus(this);
		}

		if (event.GUIEvent.EventType == gui::EGET_ELEMENT_FOCUS_LOST
				&& isVisible()) {
			if (!canTakeFocus(event.GUIEvent.Element)) {
				dstream << "GUIMainMenu: Not allowing focus change."
				<< std::endl;
				// Returning true disables focus change
				return true;
			}
		}
		if (event.GUIEvent.EventType == gui::EGET_SCROLL_BAR_CHANGED) {
			if (event.GUIEvent.Caller->getID() == ID_soundSlider) {
				s32 pos = ((gui::IGUIScrollBar*)event.GUIEvent.Caller)->getPos();
				g_settings->setFloat("sound_volume", (float) pos / 100);

				gui::IGUIElement *e = getElementFromId(ID_soundText);
				const wchar_t *text = wgettext("Sound Volume: ");
				core::stringw volume_text = text;
				delete [] text;

				volume_text += core::stringw(pos) + core::stringw("%");
				e->setText(volume_text.c_str());
				return true;
			}
		}

	}

	return Parent ? Parent->OnEvent(event) : false;
}
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/*
 * Secure Remote Password 6a implementation
 * https://github.com/est31/csrp-gmp
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2010, 2013 Tom Cocagne, 2015 est31 <MTest31@outlook.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */

#ifdef WIN32
	#include <windows.h>
	#include <wincrypt.h>
#else
	#include <time.h>
#endif

#include <stdlib.h>
#include <string.h>
#include <stdio.h>

#include <config.h>

#if USE_SYSTEM_GMP || defined (__ANDROID__) || defined (ANDROID)
	#include <gmp.h>
#else
	#include <gmp/mini-gmp.h>
#endif

#include <util/sha2.h>

#include "srp.h"
//#define CSRP_USE_SHA1
#define CSRP_USE_SHA256

#define srp_dbg_data(data, datalen, prevtext) ;
/*void srp_dbg_data(unsigned char * data, size_t datalen, char * prevtext)
{
	printf(prevtext);
	size_t i;
	for (i = 0; i < datalen; i++)
	{
		printf("%02X", data[i]);
	}
	printf("\n");
}*/

static int g_initialized = 0;

#define RAND_BUFF_MAX 128
static unsigned int g_rand_idx;
static unsigned char g_rand_buff[RAND_BUFF_MAX];

typedef struct
{
	mpz_t N;
	mpz_t g;
} NGConstant;

struct NGHex
{
	const char* n_hex;
	const char* g_hex;
};

/* All constants here were pulled from Appendix A of RFC 5054 */
static struct NGHex global_Ng_constants[] = {
	{ /* 1024 */
	"EEAF0AB9ADB38DD69C33F80AFA8FC5E86072618775FF3C0B9EA2314C9C256576D674DF7496"
	"EA81D3383B4813D692C6E0E0D5D8E250B98BE48E495C1D6089DAD15DC7D7B46154D6B6CE8E"
	"F4AD69B15D4982559B297BCF1885C529F566660E57EC68EDBC3C05726CC02FD4CBF4976EAA"
	"9AFD5138FE8376435B9FC61D2FC0EB06E3",
	"2"
	},
	{ /* 2048 */
	"AC6BDB41324A9A9BF166DE5E1389582FAF72B6651987EE07FC3192943DB56050A37329CBB4"
	"A099ED8193E0757767A13DD52312AB4B03310DCD7F48A9DA04FD50E8083969EDB767B0CF60"
	"95179A163AB3661A05FBD5FAAAE82918A9962F0B93B855F97993EC975EEAA80D740ADBF4FF"
	"747359D041D5C33EA71D281E446B14773BCA97B43A23FB801676BD207A436C6481F1D2B907"
	"8717461A5B9D32E688F87748544523B524B0D57D5EA77A2775D2ECFA032CFBDBF52FB37861"
	"60279004E57AE6AF874E7303CE53299CCC041C7BC308D82A5698F3A8D0C38271AE35F8E9DB"
	"FBB694B5C803D89F7AE435DE236D525F54759B65E372FCD68EF20FA7111F9E4AFF73",
	"2"
	},
	{ /* 4096 */
	"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E08"
	"8A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B"
	"302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9"
	"A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE6"
	"49286651ECE45B3DC2007CB8A163BF0598DA48361C55D39A69163FA8"
	"FD24CF5F83655D23DCA3AD961C62F356208552BB9ED529077096966D"
	"670C354E4ABC9804F1746C08CA18217C32905E462E36CE3BE39E772C"
	"180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF695581718"
	"3995497CEA956AE515D2261898FA051015728E5A8AAAC42DAD33170D"
	"04507A33A85521ABDF1CBA64ECFB850458DBEF0A8AEA71575D060C7D"
	"B3970F85A6E1E4C7ABF5AE8CDB0933D71E8C94E04A25619DCEE3D226"
	"1AD2EE6BF12FFA06D98A0864D87602733EC86A64521F2B18177B200C"
	"BBE117577A615D6C770988C0BAD946E208E24FA074E5AB3143DB5BFC"
	"E0FD108E4B82D120A92108011A723C12A787E6D788719A10BDBA5B26"
	"99C327186AF4E23C1A946834B6150BDA2583E9CA2AD44CE8DBBBC2DB"
	"04DE8EF92E8EFC141FBECAA6287C59474E6BC05D99B2964FA090C3A2"
	"233BA186515BE7ED1F612970CEE2D7AFB81BDD762170481CD0069127"
	"D5B05AA993B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934063199"
	"FFFFFFFFFFFFFFFF",
	"5"
	},
	{ /* 8192 */
	"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E08"
	"8A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B"
	"302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9"
	"A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE6"
	"49286651ECE45B3DC2007CB8A163BF0598DA48361C55D39A69163FA8"
	"FD24CF5F83655D23DCA3AD961C62F356208552BB9ED529077096966D"
	"670C354E4ABC9804F1746C08CA18217C32905E462E36CE3BE39E772C"
	"180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF695581718"
	"3995497CEA956AE515D2261898FA051015728E5A8AAAC42DAD33170D"
	"04507A33A85521ABDF1CBA64ECFB850458DBEF0A8AEA71575D060C7D"
	"B3970F85A6E1E4C7ABF5AE8CDB0933D71E8C94E04A25619DCEE3D226"
	"1AD2EE6BF12FFA06D98A0864D87602733EC86A64521F2B18177B200C"
	"BBE117577A615D6C770988C0BAD946E208E24FA074E5AB3143DB5BFC"
	"E0FD108E4B82D120A92108011A723C12A787E6D788719A10BDBA5B26"
	"99C327186AF4E23C1A946834B6150BDA2583E9CA2AD44CE8DBBBC2DB"
	"04DE8EF92E8EFC141FBECAA6287C59474E6BC05D99B2964FA090C3A2"
	"233BA186515BE7ED1F612970CEE2D7AFB81BDD762170481CD0069127"
	"D5B05AA993B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934028492"
	"36C3FAB4D27C7026C1D4DCB2602646DEC9751E763DBA37BDF8FF9406"
	"AD9E530EE5DB382F413001AEB06A53ED9027D831179727B0865A8918"
	"DA3EDBEBCF9B14ED44CE6CBACED4BB1BDB7F1447E6CC254B33205151"
	"2BD7AF426FB8F401378CD2BF5983CA01C64B92ECF032EA15D1721D03"
	"F482D7CE6E74FEF6D55E702F46980C82B5A84031900B1C9E59E7C97F"
	"BEC7E8F323A97A7E36CC88BE0F1D45B7FF585AC54BD407B22B4154AA"
	"CC8F6D7EBF48E1D814CC5ED20F8037E0A79715EEF29BE32806A1D58B"
	"B7C5DA76F550AA3D8A1FBFF0EB19CCB1A313D55CDA56C9EC2EF29632"
	"387FE8D76E3C0468043E8F663F4860EE12BF2D5B0B7474D6E694F91E"
	"6DBE115974A3926F12FEE5E438777CB6A932DF8CD8BEC4D073B931BA"
	"3BC832B68D9DD300741FA7BF8AFC47ED2576F6936BA424663AAB639C"
	"5AE4F5683423B4742BF1C978238F16CBE39D652DE3FDB8BEFC848AD9"
	"22222E04A4037C0713EB57A81A23F0C73473FC646CEA306B4BCBC886"
	"2F8385DDFA9D4B7FA2C087E879683303ED5BDD3A062B3CF5B3A278A6"
	"6D2A13F83F44F82DDF310EE074AB6A364597E899A0255DC164F31CC5"
	"0846851DF9AB48195DED7EA1B1D510BD7EE74D73FAF36BC31ECFA268"
	"359046F4EB879F924009438B481C6CD7889A002ED5EE382BC9190DA6"
	"FC026E479558E4475677E9AA9E3050E2765694DFC81F56E880B96E71"
	"60C980DD98EDD3DFFFFFFFFFFFFFFFFF",
	"13"
	},
	{0,0} /* null sentinel */
};


static void delete_ng(NGConstant *ng)
{
	if (ng) {
		mpz_clear(ng->N);
		mpz_clear(ng->g);
		free(ng);
	}
}

static NGConstant *new_ng( SRP_NGType ng_type, const char *n_hex, const char *g_hex )
{
	NGConstant *ng = (NGConstant *) malloc(sizeof(NGConstant));
	mpz_init(ng->N);
	mpz_init(ng->g);

	if (!ng)
		return 0;

	if (ng_type != SRP_NG_CUSTOM) {
		n_hex = global_Ng_constants[ ng_type ].n_hex;
		g_hex = global_Ng_constants[ ng_type ].g_hex;
	}

	int rv = 0;
	rv = mpz_set_str(ng->N, n_hex, 16);
	rv = rv | mpz_set_str(ng->g, g_hex, 16);

	if (rv) {
		delete_ng(ng);
		return 0;
	}

	return ng;
}


typedef union
{
	SHA_CTX    sha;
	SHA256_CTX sha256;
	//SHA512_CTX sha512;
} HashCTX;


struct SRPVerifier
{
	SRP_HashAlgorithm hash_alg;
	NGConstant *ng;

	char *username;
	unsigned char *bytes_B;
	int authenticated;

	unsigned char M[SHA512_DIGEST_LENGTH];
	unsigned char H_AMK[SHA512_DIGEST_LENGTH];
	unsigned char session_key[SHA512_DIGEST_LENGTH];
};


struct SRPUser
{
	SRP_HashAlgorithm hash_alg;
	NGConstant *ng;

	mpz_t a;
	mpz_t A;
	mpz_t S;

	unsigned char *bytes_A;
	int authenticated;

	char *username;
	char *username_verifier;
	unsigned char *password;
	size_t password_len;

	unsigned char M[SHA512_DIGEST_LENGTH];
	unsigned char H_AMK[SHA512_DIGEST_LENGTH];
	unsigned char session_key[SHA512_DIGEST_LENGTH];
};


static int hash_init(SRP_HashAlgorithm alg, HashCTX *c)
{
	switch (alg) {
#ifdef CSRP_USE_SHA1
		case SRP_SHA1: return SHA1_Init(&c->sha);
#endif
		/*case SRP_SHA224: return SHA224_Init(&c->sha256);*/
#ifdef CSRP_USE_SHA256
		case SRP_SHA256: return SHA256_Init(&c->sha256);
#endif
		/*case SRP_SHA384: return SHA384_Init(&c->sha512);
		case SRP_SHA512: return SHA512_Init(&c->sha512);*/
		default: return -1;
	};
}
static int hash_update( SRP_HashAlgorithm alg, HashCTX *c, const void *data, size_t len )
{
	switch (alg) {
#ifdef CSRP_USE_SHA1
		case SRP_SHA1: return SHA1_Update(&c->sha, data, len);
#endif
		/*case SRP_SHA224: return SHA224_Update(&c->sha256, data, len);*/
#ifdef CSRP_USE_SHA256
		case SRP_SHA256: return SHA256_Update(&c->sha256, data, len);
#endif
		/*case SRP_SHA384: return SHA384_Update( &c->sha512, data, len );
		case SRP_SHA512: return SHA512_Update( &c->sha512, data, len );*/
		default: return -1;
	};
}
static int hash_final( SRP_HashAlgorithm alg, HashCTX *c, unsigned char *md )
{
	switch (alg) {
#ifdef CSRP_USE_SHA1
		case SRP_SHA1: return SHA1_Final(md, &c->sha);
#endif
		/*case SRP_SHA224: return SHA224_Final(md, &c->sha256);*/
#ifdef CSRP_USE_SHA256
		case SRP_SHA256: return SHA256_Final(md, &c->sha256);
#endif
		/*case SRP_SHA384: return SHA384_Final(md, &c->sha512);
		case SRP_SHA512: return SHA512_Final(md, &c->sha512);*/
		default: return -1;
	};
}
static unsigned char *hash(SRP_HashAlgorithm alg, const unsigned char *d, size_t n, unsigned char *md)
{
	switch (alg) {
#ifdef CSRP_USE_SHA1
		case SRP_SHA1: return SHA1(d, n, md);
#endif
		/*case SRP_SHA224: return SHA224( d, n, md );*/
#ifdef CSRP_USE_SHA256
		case SRP_SHA256: return SHA256(d, n, md);
#endif
		/*case SRP_SHA384: return SHA384( d, n, md );
		case SRP_SHA512: return SHA512( d, n, md );*/
		default: return 0;
	};
}
static size_t hash_length(SRP_HashAlgorithm alg)
{
	switch (alg) {
#ifdef CSRP_USE_SHA1
		case SRP_SHA1: return SHA_DIGEST_LENGTH;
#endif
		/*case SRP_SHA224: return SHA224_DIGEST_LENGTH;*/
#ifdef CSRP_USE_SHA256
		case SRP_SHA256: return SHA256_DIGEST_LENGTH;
#endif
		/*case SRP_SHA384: return SHA384_DIGEST_LENGTH;
		case SRP_SHA512: return SHA512_DIGEST_LENGTH;*/
		default: return -1;
	};
}

inline static int mpz_num_bytes(const mpz_t op)
{
	return (mpz_sizeinbase (op, 2) + 7) / 8;
}

inline static void mpz_to_bin(const mpz_t op, unsigned char *to)
{
	mpz_export(to, NULL, 1, 1, 1, 0, op);
}

inline static void mpz_from_bin(const unsigned char *s, size_t len, mpz_t ret)
{
	mpz_import(ret, len, 1, 1, 1, 0, s);
}

// set op to (op1 * op2) mod d, using tmp for the calculation
inline static void mpz_mulm(mpz_t op, const mpz_t op1, const mpz_t op2, const mpz_t d, mpz_t tmp)
{
	mpz_mul(tmp, op1, op2);
	mpz_mod(op, tmp, d);
}

// set op to (op1 + op2) mod d, using tmp for the calculation