Highis
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Apple debuteaz? miercuri pe bursa de la Bucure?ti. Ac?iunile celei mai mari companii din lume se vor tranzac?iona doar dou? ore pe zi.
Ac?iunile a cinci dintre cele mai cunoscute companii americane vor fi tranzac?ionate începând de miercuri, 18 aprilie, ?i pe sistemul alternativ de tranzac?ionare (ATS) al Bursei de Valori Bucure?ti.
"Vedetele" vor fi ac?iunile produc?torului de telefoane inteligente ?i tablete Apple, care vor fi ?i cele mai scumpe ac?iuni tranzac?ionate la Bucure?ti. Pre?ul unei ac?iuni Apple a atins mar?i un nou maxim istoric, s?rind de 640 de dolari, iar miercuri se tranzac?ionau în apropierea nivelului de 630 de dolari. La acest pre?, o ac?iune Apple ar fi cotat? la Bucure?ti la circa 2.100 de lei. Apple este în prezent cea mai valoroas? companie din lume, cu o capitalizare de aproape 600 de miliarde de dolari.
Tot joi vor debuta pe burs? ?i ac?iunile Coca-Cola, Intel, Visa ?i Bank of America. Firma de brokeraj Tradeville va fi market-maker pentru cele cinci ac?iuni.
Ac?iunile se vor tranzac?iona în intervalul orar 16:30-18:30, adic? doar în cele dou?ore cât programul bursei de la Bucure?ti se suprapune peste programul burselor americane.
Sursa: aici
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Cel mai bun rapper este Eminem si pe locul 2 se afla R Kelly
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Neatza
Dar o intrebare:D
Laptopurile de la Apple nu sunt bune?
http://www.apple.com/ro/macbookpro/features.html
laptopurile apple sunt pentru business , pe ele nu merg anumite programe , jocuri :)
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Hardware
Partea hardware pentru acest proiect e destul de simpla. Banda magnetica e citita folosind un cap magnetic de la un vechi mono casetofon si cateva componente pentru a amplifica semnalul in vederea citirii mai usoare. Acesta e conectat la mufa pentru microfon a PC-ului. Puterea pentru amplificator e de asemenea luata din inputul pentru microfon, notebook-ul meu outputeaza cam 3V acolo. Pentru mai multe detalii, uitate la schema amplificatorului de AICI
Poza cu cititorul :
Software
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Prima oara am incercat softurile de Aici si AICI , dar nicicare dintre acestea doua nu au fost prea stabile (pentru mine), asa ca m-am decis sa imi scriu propriul decoder. Inainte sa citesti mai departe iti recomand sa inveti despre cum sunt datele codate pe banda magnetica
Decoderul meu incearca prima oara sa masoare latimea pulsului bitilor initiali, apoi foloseste acea marime ca referinta pentru decodarile urmatoare.
Asta se face masurand grosimea tuturor pulsurilor urmatoare si comparandule cu ultimul puls cu grosimea zero. Daca doua grosimi sunt mai aproape de pulsul zero decat de primul puls, pulsurile sunt decodate ca 1. Altfel primul puls e interpretat ca 0. In final, pulsul zero este schimbat folosind un factor dat la ultimul puls masurat pentru a lucra cu viteze diferite de lovire.
Exemplu
Sa spunem ca decoderul detecteaza urmatoarele grosimi ale pulsurilor : 91, 101, 90, 55, 44, 51, 45, 98, 48, 49, 91, 101
1) Prima grosime (91) este folosita ca pulsul zero ( sa-l numim zp)
2) Apoi zp-ul este comparat cu urmatorul puls (101; |91-101| = 10) si suma urmatorilor 2 (101+90 = 191; |91-191| = 100)
3) Dupa cum se poate vedea, grosimea e mai aproape de zp (10<100) deci pulsul e decodat ca 0
4) In cele din urma valoarea lui zp este ajustata la noua grosime de puls folosind un factor definit f (am ales 0.2 aici, dupa cateva teste initiale)
zp_nou = zp - ((zp - grosime) * f) zp_nou = 91-((91-101)*0.2)=93
5) Urmatorul puls e decodat tot ca acesta, deci nu voi explica din nou.zp_nou = 93-((93-90)*0.2)=92 (rotunjit la cea mai mica valoare)
6) Apoi zp e comparat cu urmatoarea grosime (55; |92-55|=37) si suma urmatoarelor doua (55+44=99; |92-99|=7) 7) Acum suma urmatoarelor doua pulsuri e mai aproape de zp (7<37) deci cele doua pulsuri sunt decodate ca 1 8)zp_nou=92-((92-(55+44))*0.2)=93
9) Acum totul continua ca inainte exceptand faptul ca trebuie sa folosesti 51 si 45 in loc de 44 si 51 (trebuie sa avansezi cu 2 numere in vector). Folosire Trebuie sa ai sox pentru a functiona. Decodeaza un fisier .wav inregistrat - track 1sox fisier.wav -r 48000 -t dat -q - | ./bifaze.pl 1
Decodeaza un fisier live - track 2sox rec -r 48000 -t dat -q - | ./bifaze.pl 2
Sursa decoderului meu - bifaze.pl#!/usr/bin/perl -w # Written by Hertz <ownage [dot] hertz [at] gmail.com> use strict; my $track = 2; $track = 1 if((scalar(@ARGV) == 1) && ($ARGV[0] eq '1')); my $threshold_1 = 0.2; my $maxlen_1 = 150; my $adoptrate_1 = 0.2; my $smalldiff_1 = 0.1; my $threshold_2 = 0.2; my $maxlen_2 = 350; my $adoptrate_2 = 0.2; my $smalldiff_2 = 0.1; my $dbg_lens = 0; my $dbg_dec = 0; ############################################################################### my $chars_1 = ' !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_'; my $charlen_1 = 6; my $chars_2 = '0123456789:;<=>?'; my $charlen_2 = 4; ############################################################################### $| = 1; my $threshold = $threshold_1; my $maxlen = $maxlen_1; my $adoptrate = $adoptrate_1; my $smalldiff = $smalldiff_1; my $chars = $chars_1; my $charlen = $charlen_1; if($track == 2) { $threshold = $threshold_2; $maxlen = $maxlen_2; $adoptrate = $adoptrate_2; $smalldiff = $smalldiff_2; $chars = $chars_2; $charlen = $charlen_2; } my $slope = 1; my $old = 0; my $data = 0; my $olddata = 0; my $init = 1; my $mode = 0; my $count = 0; my $len = 0; my $curlen = 0; my $oldlen = 0; my $bitmode = 0; my $chk = 0; my $complete = 1; my $celllen = 0; my $str = ''; sub parity_ok { my $charlen = shift; my $c = shift; my $one = 0; for(my $j = $charlen - 1;$j >= 0;$j--) { $one++ if(substr($c, $j, 1) eq '1'); } $one++ if(substr($c, $charlen, 1) eq '1'); return ($one % 2) == 1; } sub xtract_char { my $charlen = shift; my $c = shift; my $x = 0; for(my $j = $charlen - 1;$j >= 0;$j--) { $x <<= 1; $x |= 1 if(substr($c, $j, 1) eq '1'); } return $x; } sub decode_char { my $charlen = shift; my $chars = shift; my $str = shift; return ('x', 0) if(!parity_ok($charlen, $str)); my $x = xtract_char($charlen, $str); return ('y', 0) if($x >= length($chars)); return (substr($chars, $x, 1), $x); } while(<STDIN>) { chop; next if(/^;/); next unless(/([+-]?(?:\d+(?:\.\d*)?|\.\d+)(?:[eE][+-]?\d+)?) +([+-]?(?:\d+(?:\.\d*)?|\.\d+)(?:[eE][+-]?\d+)?)/); my ($t, $y) = ($1, $2); my $s = $slope; if($y > $threshold) { $s = 1; } elsif($y < (-1 * $threshold)) { $s = -1; } if($slope != $s) { $slope = $s; if($data) { $data = 0; } else { $data = 1; } } if($init) { $len = 0; $olddata = $data; $init = 0; $mode = 0; $bitmode = 0; } else { my $lenchange = 0; my $gotbit = 0; if($len > $maxlen) { $mode = 0; $bitmode = 0; $init = 1; if(!$complete) { print " TIMEOUT\n"; $complete = 1; } } else { if($olddata != $data) { print "$len\n" if($dbg_lens); $oldlen = $len; $curlen = $len; $len = 0; $lenchange = 1; } else { $len++; } } if($lenchange) { if($mode == 0) { $count = 3; $mode++; } elsif($mode == 1) { if($count <= 0) { $str = ''; $mode++; } else { $count--; } } elsif($mode == 2) { my $c = $oldlen; my $n = $curlen; my $d0 = abs($celllen - $c); my $d1 = abs($celllen - ($c + $n)); my $d = 0; print abs($d0 - $d1) . " " . ($celllen * $smalldiff) . "\n" if($dbg_dec); if(abs($d0 - $d1) > ($celllen * $smalldiff)) { if($d0 < $d1) { $d = 0; } else { $d = 1; } } else { $d = 1; } $str .= $d; $gotbit = 1; print "$c $n $d0 $d1 $celllen $d\n" if($dbg_dec); if($d == 0) { $celllen -= int(($celllen - $c) * $adoptrate); } else { $celllen -= int(($celllen - ($c + $n)) * $adoptrate); $mode++ } print "-> $celllen\n" if($dbg_dec); } elsif($mode == 3) { $mode--; } } if($gotbit) { if($bitmode == 0) { $complete = 0; if($str eq '1') { $bitmode++; $chk = 0; } else { $str = ''; } } elsif($bitmode == 1) { if(length($str) >= ($charlen + 1)) { my $c = substr($str, 0, $charlen + 1); $str = substr($str, $charlen + 1); print "p" if(!parity_ok($charlen, $c)); my ($ch, $x) = decode_char($charlen, $chars, $c); $chk ^= $x; print "$ch"; $bitmode++ if($ch eq '?'); } } elsif($bitmode == 2) { if(length($str) >= ($charlen + 1)) { my $c = substr($str, 0, $charlen + 1); $str = substr($str, $charlen + 1); print "p" if(!parity_ok($charlen, $c)); my ($ch, $x) = decode_char($charlen, $chars, $c); $chk ^= $x; if($chk) { print " ERROR\n"; } else { print " OK\n"; } $complete = 1; $bitmode = 0; } } } } $olddata = $data; $old = $y;}
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Sper sa nu fiu sanctionat pentru double post .
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About.txt 2011-Dec-21 09:25:43 0.1K text/plain
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de aproximativ 2 ani nu mai sunt de vanzare windows xp in magazine
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In primul rand vreau sa-mi cer scuze pentru inevitabilele greseli de ortografie deoarece sunt multe subiecte
pe care vreau sa le acopar in acest articol si nu am timp sa mai si verific ce am scris deja.
PARTEA I. Algoritmul de codare "yahoo64"
Acest algoritm este folosit de Yahoo oriunde trebuie transformat un sir de caractere neprintabile intr-un
sir de caractere printabil.
Se numeste "codare" si nu "criptare" deoarece nu ofera absolut nici o protectie pentru sirul de caractere de
codat. Fara a intra in aspecte criptografice trebuie metionat ca yahoo64 este foarte asemanator cu base64
insa are un charset extins.
Charsetul yahoo64 este urmatorul "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvw xyz0123456789._"
yahoo64 are cateva caracteristici distincte care trebuie mentionate:
> toate caracterele din stringul codat fac parte din charsetul de mai sus
> lungimea stringului este multiplu de 4
> in functie de lungimea stringului initial, la sfarsitul stringului criptat ultimele caractere pot fi "-"
sau "--".
Pentru mai multe detalii studiati cele doua functii php(pentru codare si decodare) de la sfarsitul acestui
articol.
PARTEA II. Analiza tokenului Yahoo
Din cate am observat pana acum tokenul Yahoo este o insumare a userului si parolei de Yahoo, unic pentru
fiecare username in parte dar care se modifica (doar partial) la schimbarea parolei.
In esenta posesia acest token exprima ca posesorul este fie userul fie o entitate care are permisiunea
userului de a actiona in numele acestuia pe serverele Yahoo.
Un user isi poate obtine acest token prin accesarea linkului urmator:
https://login.yahoo.com/config/pwtok...c=ymsgr&login=[USERNAME]&passwd=[PASSWORD] unde [USERNAME] si [PASSWORD] sunt o combinatie username/parola Yahoo VALIDE. Utilitatea acestui token este ca poate oferi oricand un COOKIE valid de Yahoo.
https://login.yahoo.com/config/pwtok...c=ymsgr&token=[TOKEN]
Un exemplu de raspuns la un reqest catre "https://login.yahoo.com/config/pwtoken_get" poate fi acesta:0 ymsgr=AGG6e0diD9m.3D4YlFPVcdBT1wFXKSBWP0Hl.gyQKd.qec8- partnerid=KSBWP0Hl.gyQKd.qec8-
"ymsgr" este tokenul despre care am vorbit mai devreme si dupa cum se observa "partnerid" face parte din acest token (la sfarsit). Acest "partnerid" este unic pentru fiecare utilizator in parte si nu se modifica la schimbarea parolei, iar lungimea acestuia variaza in functie de lungimea username'ului. Dupa cum se poate observa lungimea tokenului este de 48 si se termina cu un "-" deci este evindent codat cu yahoo64. Dupa decodare obtinem urmatorul sir de caractere (unde fiecare 2 caractere reprezinta valoarea hexadecimala a unui singur caracter din tokenul decodat):00 61 BA 7B 47 62 0F D9 BE DC 3E 18 94 53 D5 71 D0 53 D7 01 57 29 20 56 3F 41 E5 FA 0C 90 29 DF AA 79 CF
La toate tokenurile pe care le-am vazut pana acum primul caracter este intotdeauna "0x00" Urmatoarele 4 caractere reprezinta timestampul (numarul de secunde care au trecut din 1-1-1970) la care userul a fost creeat sau cand parola a fost schimbata, doar ca timestampul este inversat deci pentru exemplul de mai sus timestampul va fi 0x477BBA61 (decimal 1199290977) adica "Wed, 2 Jan 2008 16:22:57 GMT" Daca decodam "partnerid" vom obtine urmatorul string:29 20 56 3F 41 E5 FA 0C 90 29 DF AA 79 CF
care dupa cum sa observa sunt ultimele 14 caractere de la sfarsitul tokenului. Daca din token eliminam primul caracter (00) timestampul (61 BA 7B 47) si parnerid'ul decodat vom ramane cu62 0F D9 BE DC 3E 18 94 53 D5 71 D0 53 D7 01 57
Acest string rezultat are o lungime de 16 caractere ceea ce duce la concluzia ca este un hash MD5 (md5() produce un hash de 128 de biti adica 16 caractere intre 0x00 si 0xFF, a nu se confunda cu md5_he) care produce un string de 32 de caractere reprezentand valorile hexadecimale ale celor 16 caractere produse de md5() ) La schimbarea parolei se modifica doar timestampul si acest hash MD5 ceea ce ma face sa cred ca din stringul initial (care produce hashul) face parte fie timestampul fie parola fie ambele. Trebuie sa mentionez pentru cei care vor face teste ca acest token trebuie pastrat SECRET deoarece dupa cum am spus si mai sus cunoasterea tokenului poate duce la compromiterea contului (parola NU trebuie sa fie cunoscuta pentru a obtine un set de cookiuri) PARTEA III. Yahoo! Messenger "Remember my ID & password" Incepand cu versiunea 7.x.x.x Yahoo! Messnger NU mai memoreaza parola atunci cand optiunea "Remember my ID & password" este bifata. In schimb este memorat tokenul despre care am vorbit mai sus deoarece dupa cum o sa arat mai tarziu tokenul este suficient pentru logarea cu succes la serviciul messenger. Pentru memorare tokenul este criptat si stocat in registrii windows in cheiaHKEY_CURRENT_USER\Software\Yahoo\Pager\ETS
Userul este de asemenea salvat deoarece este necesar pentru decriptareHKEY_CURRENT_USER\Software\Yahoo\Pager\Yahoo! User ID
Nu voi da un exemplu de astfel de string deoarece desi algoritmul de criptare imi este deocamdata necunoscut poate fi totusi decriptat si extras un token folosind functii din "YahooMessenger.exe". Analiza pe care am facut-o unui string ETS este destul de sumara: tokenul este criptat folosind o cheie formata din "MBCS sucks"+USERNAME. Stringul rezultat fiind apoi codat cu yahoo64 si stocat in registrii la cheia ETS. Pentru crackeri decriptarea se face in "YahooMessenger.exe" (8.1.0.421) la offsetul 0x004862AA unde functia locala de la offsetul 0x006FCEC0 primeste urmatorii 9 parametrii 1. Stringul ETS 2. Lungimea stringului ETS 3. Pointer catre tokenul decriptat 4. Pointer catre lungimea tokenului 5. Cheia de decriptare "MBCS sucks[uSERNAME]" 6. Lungimea cheii de decriptare 7. 0x00 8. 0x00 9. 0x00 PARTEA IV. Autentificarea YMSGR v15 In continuare voi presupune ca sunteti deja familiarizati cu protocolul Yahoo! Messenger(formarea pachetelor si parametrii unui pachet) Este de mentionat ca din motive de compatibilitate YMSGR15 accepta si logarea clasica user/password dar mult mai important este ca Yahoo! Messnger foloseste si logarea cu COOKIE. Pentru o logare cu succes Yahoo! Messnger face urmatorii pasi: -Daca optiunea "Remember my ID & password" este bifata decripteaza stringul ETS si obtine un token, daca nu va folosi userul si parola introduse pentru a face un request la "https://login.yahoo.com/config/pwtoken_get" pentru a obtine tokenul -Dupa conectarea la unul din serverele yahoo trimite un pachet VERIFY (0x4C) -Daca primeste un raspuns valid VERIFY de la server incepe procedura de autentificare -Trimite un pachet AUTH (0x57) cu parametrii: "1" - USERNAME -Primeste un pachet AUTHRESP (0x54) din care extrage valoarea parametrului "94" (CHALLENGE) -Avand un token valid al userului va face un request catre "https://login.yahoo.com/config/pwtoken_login" pentru a obtine valorile "Y" si "T" ale cookieului precum si valorea "crumb" (CRUMB) -Creeaza un string (STRING307) astfel yahoo64(md5(CRUMB+CHALLENGE)) -Trimite un pachet AUTHRESP (0x54) cu parametrii: "277" - parametrul Y "278" - parametrul T "307" - STRING307 "0" - USERNAME "2" - USRNAME "2" - "1" "1" - USERNAME "244" - un numar random (ex. "2097087") "98" - "us" "135" - versiunea clientului (ex. "8.1.0.421") "148" - "-120" -Daca totul e in regula userul este autentificat iar serverul trimite buddy listul si alte informatii cum ar mailuri noi, add buddy request etc. PARTEA V. Analiza si explicatia cookiurilor Yahoo Odata cu autentificarea la un serviciu Yahoo userul primeste cookiurile "Y" si "T" deci analiza mea a fost concentrata doar asupra acestor 2 cookiuri. Cookieul Y poate fi configurat sa expire dupa o valoare intre 15 minute si 24 de ore dar cookieul T expira de obicei la inchiderea browserului sau la logout. Pentru serviciile cu securitate scazuta cum ar fi pagina "My Yahoo" cookiul Y este suficient dar pentru cele mai importante cum ar fi mail,calendar etc.. cookieul T este obligatoriu. Dupa cum probabil ati observat un cookie Yahoo este format din perechi "parametru=valoare". In continuare voi analiza parametrii care formeaza fiecare cookie si voi incercat sa prezent o explicatie pentru prezenta sau scopul lor. -Cookieul Y: Exemplu:Y=v=1&n=9mioklmar8tku&l=glagla/o&p=m2509oh012000000&r=in&lg=en-US&intl=us&np=1
Contine usernameul,un ID unic si cateva informatii demografice. De obicei acesta ramane neschimbat pentru un anumit user modificandu-se doar ID'ul unic (la schimbarea parolei) si informatiile demografice (la schimbarea adresei, limba utilizata, etc...) Dupa cum se observa este format din parametrii v,n,l,p,r,lg,intl si np dar nu toti sunt necesari pentru autentificarea cu succes al unui user. Parametrul "n" este un ID unic intern al utilizatorului (se modifica doar la schimbarea parolei) care este comparat cu o valoare interna yahoo la anumite requesturi pentru obtinerea de informatii sau pentru expirarea automata a tuturor cookiurilor vechi odata cu schimbarea parolei. Parametrul "l" este usernameul codat cu un algoritm simplu de substitutie unde fiecare caracter din user are un corespondent intr-un alt string dupa cum urmeaza:PLAINTXT=klmnopqrstuvwxyz0123457896abcdefghij._ ENCODED=abcdefghijklmnopqrstuvxyzw0123456789._
Astfel pentru cookiul de mai sus username'ul este "qvkqvk" Parametrul "p" contine diverse informatii despre utilizator cum ar fi sex, data nasterii, tara, etc. Restul parametrilor contin de asemenea diverse informatii despre limba, anumite setari, etc. -Cookieul T: Exemplu:T=z=Cr7eHBCxQfHBJkF/Bqb4dnUMzIwBjVPNDQzNDFOME8-&a=QAE&sk=DAAk3Lb2EiyEEM&ks=EAA3i37q0zwFhuCnF6cflaKHg--~A&d=c2wBTkRVM0FUSTRNek0wTXpZNU56Zy0BYQFRQUUBenoBQ3I3ZUhCZ1dBAXRpcAFzNkpUZEM-
Contine un timestamp si o semnatura digitala simetrica. Acesta se modifica la modificarea timpului(oricate cookiuri generate intr-o singura secunda sunt identice) Este format din parametrii z,a,sk,ks si d dar pentru autentificare la serviciile web sunt necesari doar parametrii sk,ks si d. Pentru autentificare Yahoo! Messenger "z" este insa obligatoriu. Parametrul "z" exista pentru compatibilitate cu servicii mai vechi dar este de asemenea in stransa legatura cu valoarea CRUMB obtinuta pentru autentificarea Yahoo! Messenger. Acesta este un string criptat cu yahoo64 dar decodarea acestuia nu prezinta nici o informatie evidenta) Parametrul "a" (de obicei are valoarea "QAE") contine diverse flaguri pentru expirare si protectia minorilor. Parametrul "sk" reprezinta sesiunea (session key) si este calculat din username, ID unic si timestamp precum si dintr-un string cunoscut doar pe serverele Yahoo (Yahoo shared secret) Parametrul "ks" reprezinta (din observatiile mele) un hash al parolei utilizatorului sau un alt string care inlocuieste parola deoarece lipsa acestui este urmata de obligatia introducerii parolei(pe serverele web Yahoo). Daca ignoram primele 3 caractere care nu se schimba ("DAA") si ultimele 2 caractere care de asemenea nu se schimba ("~A") obtinem un string codat yahoo64 reprezentand cel mai probabil un hash MD5 (stringul decodat are 16 caractere) cel mai probabil de asemenea generat folosind un shared secret. Parametrul "d" contine sesiunea utilizatorului si cateva informatii pentru compatibilitate. Acesta este un string codat yahoo64. Dupa decodarea valorii "d" din exemplul de mai sus obtinem urmatorul string: (unde [sEP] este caracterul hexadecimal 0x01)sl[SEP]NDU3ATI4MzM0MzY5Nzg-[SEP]a[SEP]QAE[SEP]zz[SEP]Cr7eHBgWA[SEP]tip[SEP]s6JTdC
Se poate observa ca acest string este de asemenea o insiruire de perechi "parametru=valoare" astfel:sl=NDU3ATI4MzM0MzY5Nzg-&a=QAE&zz=Cr7eHBgWA&tip=s6JTdC
Valoarea parametrului "sl" este de asemenea un string criptat yahoo64:457[SEP]2833436978 (sau 457=2833436978)
Acest numar este unic pentru fiecare username si nu se modifica la schimbarea parolei Parametrul "a" este acelasi cu parametrul "a" din cookiul "T" Parametrul "zz" reprezinta in esenta un contor de timp. Valorile pe care le poate lua un caracter facand parte din charsetul yahoo64 cu singura diferenta ca "_" este inlocuit de "/". Cea mai buna analogie pe care o pot face incercand sa explic acest parametru este aceea cu un kilometraj de masina, Adica fiecare caracter(de la stanga la dreapta) poate fi asemanata cu o rotita cu valorile din charset. atunci cand primul caracter termina o rotatie completa prin toate pozitiile, al doilea caracter creste cu o pozitie continuand in aclasi mod pana la al 6-lea caracter. Stiind ca primul caracter creste cu o pozitie pe secunda se poate afla timestampul la care un anumit cookie a fost generat. (cand userul s-a logat serviciul respectiv) Parametrul "tip" este acelasi pentru toti utilizatorii Yahoo dar se schimba periodic (nu stiu intervalul exact) Cam atat cu acest articol si felicitari pentru cei care au avut rabdarea sa-l citeasca pana la capat. Astept pareri sau adaugiri cu privire la aceste subiecte. Algoritmul de codare yahoo64:<?php //yahoo64 encode/decode functions by SlicK [slick@rstcenter.com] function yahoo64_encode($source) { $yahoo64="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789._"; $limit=strlen($source)-(strlen($source)%3); $dest=""; for($i=0;$i<$limit;$i+=3) { $dest.=$yahoo64[ord($source[$i])>>2]; $dest.=$yahoo64[((ord($source[$i])<<4)&0x30) | (ord($source[$i+1])>>4)]; $dest.=$yahoo64[((ord($source[$i+1])<<2)&0x3C) | (ord($source[$i+2])>>6)]; $dest.=$yahoo64[ord($source[$i+2])&0x3F]; } switch(strlen($source)-$limit) { case 1: { $dest.=$yahoo64[ord($source[$i])>>2]; $dest.=$yahoo64[(ord($source[$i])<<4)&0x30]; $dest.='--'; } break; case 2: { $dest.=$yahoo64[ord($source[$i])>>2]; $dest.=$yahoo64[((ord($source[$i])<<4)&0x30) | (ord($source[$i+1])>>4)]; $dest.=$yahoo64[((ord($source[$i+1])<<2)&0x3c)]; $dest.='-'; } break; } return($dest); } function Index($string,$chr) { for($i=0;$i<64;$i++) { if($string[$i]==$chr) { return($i); } } return(-1); } function yahoo64_decode($source) { $yahoo64="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789._"; $len=strlen($source); if($source[$len-1]=='-') { $plus=2; } if($source[$len-2]=='-') { $plus=1; } if($plus>0) { $len-=4; }; $dest=""; for($i=0;$i<$len;$i+=4) { $chr1=Index($yahoo64,$source[$i]); $chr2=Index($yahoo64,$source[$i+1]); $chr3=Index($yahoo64,$source[$i+2]); $chr4=Index($yahoo64,$source[$i+3]); $dest.=chr(($chr1<<2)|($chr2>>4)); $dest.=chr((($chr2&0xF)<<4)|($chr3>>2)); $dest.=chr((($chr3&0x3)<<6)|($chr4&0x3F)); } switch($plus) { case 1: { $chr1=Index($yahoo64,$source[$i]); $chr2=Index($yahoo64,$source[$i+1]); $dest.=chr(($chr1<<2)|($chr2>>4)); } break; case 2: { $chr1=Index($yahoo64,$source[$i]); $chr2=Index($yahoo64,$source[$i+1]); $chr3=Index($yahoo64,$source[$i+2]); $dest.=chr(($chr1<<2)|($chr2>>4)); $dest.=chr((($chr2&0xF)<<4)|($chr3>>2)); } break; } return($dest); } //usage example $string="any string"; print("Original string=$string \n"); $encoded=yahoo64_encode($string); print("Encoded string=$encoded \n"); $decoded=yahoo64_decode($encoded); print("Decoded string=$decoded \n"); ?> -
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salut Momyimontv , daca vrei componente bune pentru pc-ul tau viziteaza emag
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ASRock isi va dezvalui cea mai noua placa de baza, bazata pe seria 7 de chipset-uri Intel
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ASRock isi va dezvalui cea mai noua placa de baza, bazata pe seria 7 de chipset-uri Intel, la Annual Global Tour 2012. Placa ofera suport pentru procesoarele Intel® Core i7 / i5 / i3 de a doua si a treia generatie. Cu tehnologia unica XFast 555 (XFast RAM, XFast LAN, XFast USB), placa de baza ASRock din seria 7, permite utilizatorilor sa experimenteze adevarata imbunatatire de performanta (de pana la 5 ori mai mare) din punct de vedere al vitezei generale, LAN si transfer-ului USB. ASRock si-a format o reputatie prin fabricarea de placi de baza fiabile, cu pret foarte competitiv. La Annual Global Tour 2012, ASRock isi va expune mult asteptatele placi avand la baza chipset-uri Intel din seria 7.
Dati-mi 5! Tehonologie Exclusiv? XFast 555
Pe langa dezvoltarea unor componente hardware de foarte buna calitate, ASRock are grija sa furnizeze unelte software prietenoase pentru utilizatori. Toate functiile inovatoare ale Tehnologiei XFast 555 nu sunt specialitati ale celor mai noi placi de baza, dar pot fi implementate pe toate seriile placilor de baz? ASRock.
XFast RAM va crea un disc virtual din memoria RAM, pentru a spori performantele sistemului. In Photoshop, poate lucra de 5 ori mai rapid ca inainte. XFast LAN poate micsora latenta din jocuri, dupa setarea la un nivel mai ridicat a prioritatii de joaca in retea si dezvolta de 5 ori mai multa performanta. XFast USB este cea mai rapida tehnologie de transfer USB din lume si ofera de pana la 5 ori mai multa performanta in transferul de date.
Lucid Virtu Universal MVP
Placa de baza ASRock din seria 7 ofera suport pentru tehnologia Lucid Virtu Universal MVP, ce imbunatateste imagistica PC-ului, cu timpi de reactie mai buni, procesare video imbunatatita si redare media constanta. Conceput exclusiv pentru gaming, Virtu Universal MVP™ atribuie in mod dinamic sarcinile catre cea mai buna placa grafica.
De altfel, sunt doua tehnologii noi introduse aici:
- HyperFormance - combina grafica integrata si cea atasata, pentru performante fara compromis, cu castig de performanta de 90%!
- Virtual Vsync - rezolva dezbaterea eterna dintre calitate si performanta. Aduce performanta GPU, de la 60FPS Vsync la maximum posibil, in timp ce mentine calitatea imaginii Vsync si evita ruperea texturilor.
ASRock OMG (Online Management Guard)
OMG este o tehnlogie unica dezvoltata de ASRock! Aceasta permite utilizatorului sa stabileasca o sesiune Internet sau sa restrictioneze accesul, in anumite momente. Astfel, administratorii pot programa inceputurile si sfarsiturile sesiunilor de Internet al utilizatorilor. In plus, este un utilitar gratuit, care poate fi folosit si pe un singur PC. Parintii pot controla usor accesul la Internet al copiilor, folosind setarile din BIOS.
ASRock Internet Flash
Internet Flash este o unealta foarte prietenoasa, care cauta versiunile noi de BIOS UEFI, pe serverele ASRock. Tehnologia poate detecta ultima aparitie a unui BIOS UEFI si-l poate scrie in placa de baza, fara a fi nevoie de pornirea sistemului de operare.
Sursa