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浣嗘槸鐢ㄤ簩杩涘埗鏌ョ湅宸ュ叿鏌ョ湅杩欏紶鍥剧墖锛屽氨浼氬彂鐜颁粬鍦ㄦ湯灏惧浜?11 涓瓧鑺傦紝姝ｆ槸
text.txt閲岀殑鍐呭鈥斺€?hello word锛?/p>
杩欐牱鎴戜滑灏辫揪鍒颁簡闅愬啓鐨勭洰鐨勩€?/p>
澶у涓嶈瑙夊緱杩欎釜鏂规 low锛屽疄闄呬笂闃块噷鐨勪竴浜涘瘑閽ュ氨鏄€氳繃绫讳技鐨勫師鐞嗗啓鍒颁竴寮犲浘鐗囬噷鐨勶紙褰撶劧涓嶄細鍍忎互涓婃渚嬮偅涔堢畝鍗曪級銆傛垜浠湪浼犺緭鐑洿鏂?bundle 鏂囦欢鏃讹紝鍙互鎶?bundle 鏂囦欢闅愬啓鍦ㄤ竴寮犲浘鐗囬噷锛岃繖鏍峰鏍镐汉鍛樺湪鍋氭祦閲忕洃鎺х殑鏃跺€欙紝鎶撳寘鐪嬪埌鐨勬槸涓€寮犲浘鐗囷紝濡傛灉涓嶆鏌ュ浘鐗囩殑浜岃繘鍒剁紪鐮侊紝鏄笉浼氬彂鐜伴噷闈㈤殣钘忎簡鏁版嵁鐨勩€?/p>
閽堝杩欑鏂规锛屾湇鍔＄鍜屽鎴风鐨勬敼鍔ㄩ兘姣旇緝灏忥紝鏈嶅姟绔彧闇€瑕佹瘡娆′笅鍙?bundle 鏃跺墠鍚堝苟涓€涓浘鐗囨枃浠讹紝瀹㈡埛绔鍙栭殣鍐欏浘鐗囧悗鍘绘帀澶氫綑鐨勫浘鐗囨暟鎹氨鍙互浜嗐€?/p>
褰撶劧闅愬啓鏈繕鏈夊緢澶氱锛屾瘮濡傝鍩轰簬 LSB 鐨勫浘鐗囬殣鍐欐妧鏈紝鎶婃暟鎹啓鍦?jpg png mp4 鐨勬墿鍏呮暟鎹瓧娈甸噷锛屽洜涓哄師鐞嗗ぇ鍚屽皬寮傦紝杩欓噷灏变笉澶氫粙缁嶄簡锛屾劅鍏磋叮鐨勫悓瀛﹀彲浠ヨ嚜琛屾悳绱㈠涔犮€?/p>
1.2 瀵圭О鍔犲瘑
瀵圭О鍔犲瘑涔熸槸涓€涓巻鍙叉偁涔呯殑鍔犲瘑鎶€鏈紝鍦ㄤ俊鎭妧鏈殑鍔犳寔浜嗕笅涔熼閫熷彂灞曪紝鎴戜妇涓渶绠€鍗曠殑瀵圭О鍔犲瘑绠楁硶鈥斺€?strong>寮傛垨绠楁硶鍔犲瘑銆?/p>
寮傛垨杩愮畻鎴戞兂姣忎竴涓▼搴忓憳閮戒笉闄岀敓锛屾垜浠厛绾﹀畾 0 涓?false锛?1 涓?true锛岄偅涔?XOR 杩愮畻鐨勭湡鍊艰〃濡備笅锛?/p>
A B A 鈯?B 0 0 0 0 1 1 1 0 1 1 1 0 浠庣湡鍊艰〃鍙互寰堝鏄撴帹鍑轰笅闈㈢殑杩愮畻娉曞垯锛?/p>
$$A \\oplus 0=A$$
$$A \\oplus A=0$$
$$(A \\oplus B) \\oplus C=A \\oplus(B \\oplus C)$$
杩愮敤涓婇潰鐨勮繍绠楄鍒欙紝鎴戜滑鍋囪 $A$ 鏄?strong>瀵嗛挜锛屽鍐呭 $B$ 鍔犲瘑锛岄偅涔堝緱鍒扮殑瀵嗘枃灏辨槸 $(B \\oplus A)$锛涙兂瀵瑰瘑鏂囪В瀵嗭紝鍙璁╁瘑鏂囧拰瀵嗛挜 $A$ 鍐嶈繘琛屼竴娆″紓鎴栬繍绠楀氨鍙互浜嗭細$(B \\oplus A) \\oplus A=B \\oplus 0=B$
鎴戜滑鍙互鐢ㄤ唬鐮佷妇渚嬪瓙楠岀畻涓€涓嬶細
// 鍔犲瘑锛?// 鍘熸枃 瀵嗛挜 绉樻枃 01010111 ^ 11110011 = 10100100 // 瑙ｅ瘑锛?// 绉樻枃 瀵嗛挜 鍘熸枃 10100100 ^ 11110011 = 01010111浼楁墍鍛ㄧ煡锛屼綅杩愮畻閮芥槸闈炲父蹇殑锛屽鏋滆绠€鍗曞湴瀵?bundle 鍋氫釜娣锋穯锛岀洿鎺ョ敤寮傛垨鍔犲瘑锛屽熀鏈笂涓嶄細褰卞搷鎬ц兘銆?/p>
铏界劧寮傛垨杩愮畻寰堢畝鍗曪紝浣嗘槸瀵嗙爜瀛︽湁涓涓€鍑嗗垯锛?strong>姘歌繙涓嶈鑷繁瀹炵幇鍔犲瘑绠楁硶銆傛垜浠彲浠ョ敤宸茬粡闈炲父鎴愮啛鐨勫绉板姞瀵嗙畻娉曪紙渚嬪 AES 鍜?DES锛夊 bundle 杩涜鍔犲瘑锛氭€ц兘楂橈紝瀹夊叏鎬уソ锛屾渶閲嶈鐨勬槸寮€婧愮ぞ鍖洪兘鏈夌幇鎴愮殑搴擄紝鐩存帴璋冨寘灏卞彲浠ヤ簡銆?/p>
鎵€浠ュ鏋滅敤瀵圭О鍔犲瘑鐨勬柟妗堬紝鍙鏈嶅姟绔拰瀹㈡埛绔晢閲忓ソ涓€涓瘑閽ワ紝鐒跺悗鏈嶅姟绔敤瀵嗛挜鍔犲瘑 bundle锛屽鎴风鐢ㄥ悓涓€涓瘑閽ヨВ瀵嗭紝灏辫兘鍦ㄤ竴瀹氱▼搴︿笂缁曡繃 App Store 鐨勫紓甯告祦閲忔娴嬨€?/p>
1.3 闈炲绉板姞瀵?/h4>
闈炲绉板姞瀵嗘槸灞炰簬杩戜唬瀵嗙爜瀛︾殑鍐呭浜嗭紝闈炲父鐨勬柊锛屼絾鏄篃闈炲父鐨勫彲闈狅紝鍏蜂綋鍘熺悊澶鏉備簡锛屼竴鍙ヤ袱鍙ユ牴鏈涓嶆竻妤氾紝鎴戝氨涓嶅仛浠嬬粛浜嗐€?/p>
鍦ㄥ姞瀵嗙儹鏇存柊 bundle 杩欎釜鍦烘櫙涓嬶紝鍏跺疄鍜屽绉板姞瀵嗙殑鏁堟灉宸笉澶氾紝鍙笉杩囨崲鎴愮閽ュ姞瀵嗗叕閽ヨВ瀵嗕簡銆?/p>
1.4 鎬荤粨
涓€鑸潵璇达紝瀵?bundle 鍔犲瘑涓嶄細鍗曠函浣跨敤涓€绉嶆妧鏈紝姣斿璇存垜浠細鐢?strong>娣峰悎鍔犲瘑鐨勬柟寮忓 bundle 鏈韩鍔犲瘑锛岀敤娑堟伅璁よ瘉鐮?/strong>锛堜緥濡?HMAC锛夐槻绡℃敼锛屽姞鍏?strong>鏃堕棿鎴抽殢鏈烘暟闃查噸鏀撅紝鏈€鍚庡啀鎶婂姞瀵嗗悗鐨勬暟鎹繘琛?strong>闅愬啓......杩欓噷闈㈢殑缁勫悎瀹炲湪鏄お澶氫簡锛屼釜浜鸿涓哄弬鑰冧竴浜涚粡鍏哥殑鍔犲瘑缁勫悎杩涜涓氬姟瀹炶返鍗冲彲銆?/p>
2.瀵逛俊閬撳姞瀵?/h3>
淇￠亾鍔犲瘑鍦ㄦ湰鏂囩殑鍦烘櫙涓嬩篃姣旇緝鐩磋锛屽氨鏄娇鐢?HTTPS 鍗忚锛岀洰鐨勫氨鏄槻姝㈠鏍镐汉鍛橀€氳繃鎶撳寘鐨勬柟寮忔崟鑾峰埌鎴戜滑鐨勭儹鏇存柊娴侀噺銆傚綋鐒?HTTPS 涔熸湁寰堝鐨勬湁鎰忔€濈殑鐭ヨ瘑鐐癸紝涓嬮潰鎴戝氨绠€鍗曚粙缁嶄竴涓嬨€?/p>
2.1 浣跨敤 HTTPS
2021 骞翠簡锛屾垜鎯充簰鑱旂綉涓婂熀鏈病鏈夎８闇茬殑 HTTP 鏄庢枃娴侀噺浜嗗惂......鍓嶅嚑骞村彲鑳借繕浼氭湁浼佷笟鑰冭檻 HTTPS 鍔犲瘑甯︽潵鐨勬湇鍔″櫒鎴愭湰锛屼絾鍦ㄥ悇澶у钩鍙帮紙iOS/Android/Chrome锛夌殑瑕佹眰涓嬶紝闄や簡涓埆鏃犱汉缁存姢鐨勭綉绔欙紝鍩烘湰閮藉叏绔欎笂 HTTPS 浜嗭紝姣曠珶鐜板湪鏁版嵁鐨勪环鍊艰繙杩滈珮浜庢湇鍔＄鐨勭數璐癸紝涓婁簡 HTTPS 鍚庯紝璧风爜琚腑闂翠汉鏀诲嚮琚姭鎸佺殑姒傜巼浼氶檷浣庝笉灏戙€?/p>
涓?HTTPS 灏遍珮鏋曟棤蹇т簡鍚楋紵閭ｈ偗瀹氫笉鏄€傛垜鍘诲勾鍐欒繃涓€绡?Charles 鎶撳寘鐨勬枃绔狅紝閲岄潰鑺变簡澶ч噺鐨勭瘒骞呭幓浠嬬粛 HTTPS 鎶撳寘銆傛棦鐒朵竴涓?APP 寮€鍙戣€呭彲浠ュ€熷姪甯傚満涓婄殑宸ュ叿杩涜鎶撳寘锛岄偅涔堝鏍镐汉鍛樻洿鍙互浜嗐€傚湪鎶撳寘宸ュ叿涓嬶紝澶ч儴鍒?HTTPS 鏁版嵁閮藉彲浠ヨ鎹曡幏鍜屽姭鎸併€備笅闈㈡垜浠氨璇磋 HTTPS 鍗忚涓竴浜涙瘮杈冮珮闃剁殑鍐呭銆?/p>
2.2 HTTPS 璇佷功鍥哄畾
HTTPS 璇佷功鍥哄畾锛屽張鍙?HTTPS 璇佷功閿佸畾锛岃嫳鏂囧悕涓?Certificate Pinning锛屾寚鐨勬槸鎴戜滑鍦?APP 鍐呯疆浠呮帴鍙楁寚瀹氬煙鍚嶇殑璇佷功锛岃€屼笉鎺ュ彈鎿嶄綔绯荤粺鎴栨祻瑙堝櫒鍐呯疆鐨凜A鏍硅瘉涔﹀搴旂殑浠讳綍璇佷功銆?/p>
閫氳繃杩欑鎺堟潈鏂瑰紡锛屾垜浠彲浠ヤ繚闅?APP 涓庢湇鍔＄閫氫俊鐨勫敮涓€鎬у拰瀹夊叏鎬с€傚鏋滃紑鍚簡鎶撳寘杞欢锛屼笉涓诲姩瀵煎叆鍥哄畾鐨勮瘉涔?/a>锛屽氨鏃犳硶鏈夋晥鐨勬姄鍖咃紙鍏蜂綋鍘熺悊鍙湅鎴戠殑鍗氭枃锛?a href="https://link.segmentfault.com/?url=https%3A%2F%2Fsupercodepower.com%2Fuse-charles%23%25E4%25B8%2580%25E3%2580%2581charles-%25E6%258A%2593%25E5%258C%2585%25E5%258E%259F%25E7%2590%2586" rel="nofollow">Charles 鎶撳寘鍘熺悊锛夈€傛垜鎯冲鏍镐汉鍛樿繕娌￠偅涓簿鍔涘幓鐮稿３浣犵殑 APP 鑾峰彇浣犵殑璇佷功锛屾墍浠ュ彲浠ラ€氳繃杩欑鏂瑰紡闅愯棌浣犵殑鐑洿鏂?bundle銆?/p>
褰撶劧锛岃瘉涔﹀浐瀹氫篃鏄湁涓€瀹氫唬浠风殑銆侰A 绛惧彂璇佷功閮藉瓨鍦ㄦ湁鏁堟湡闂锛屾墍浠ョ己鐐规槸鍦ㄨ瘉涔︾画鏈熷悗闇€瑕佸皢璇佷功閲嶆柊鍐呯疆鍒?APP 涓€?/p>
2.3 HTTPS 鍙屽悜璁よ瘉
鎴戜滑骞冲父浣跨敤 HTTPS 鏃讹紝涓€鑸彧鍋氫簡鍗曞悜璁よ瘉锛屽嵆瀹㈡埛绔璇佹湇鍔＄鐨勭湡瀹炴€?/strong>銆傚叾瀹?HTTPS 鏀寔鍙屽悜璁よ瘉鐨勶紝鍗?strong>鏀寔鏈嶅姟绔璇佸鎴风鐨勭湡瀹炴€?/strong>锛堝叿浣撴祦绋嬪彲瑙佷笅鍥?* 閮ㄥ垎锛夈€?/p>
涓€鑸潵璇村紑鍚?HTTPS 鍙屽悜璁よ瘉鐨?APP 閮芥槸閭ｇ瀹夊叏鎬ц姹傛瀬楂樼殑 APP锛屾瘮濡傝閲戣瀺绫?APP 鍜屽尶鍚嶇ぞ浜ょ被 APP銆傝€屼笖鎯宠瀹炵幇鍙屽悜璁よ瘉锛屽氨蹇呴』瑕佸湪瀹㈡埛绔唴缃竴浠藉叕閽ヨ瘉涔﹀拰绉侀挜锛屼絾 APP 鍙堟湁鐮稿３椋庨櫓锛屾墍浠ヨ繕寰楁兂鍔炴硶鎶婅繖涓や釜涓滆タ鍔犲瘑鍜岄殣鍐欙紙閮芥垚淇勭綏鏂濞冧簡锛夈€?/p>
缁煎悎鏉ョ湅锛屽疄鐜?HTTPS 鍙屽悜璁よ瘉鐨勬垚鏈繕鏄緢楂樼殑锛屼絾鏄竴鏃﹀疄鐜帮紝瀹夊叏绯绘暟杩樻槸闈炲父楂樼殑锛屼笉浠呬粎鏄粫杩囧鏍镐汉鍛樼殑娴侀噺妫€娴嬶紝缁煎悎鏉ョ湅鏁翠釜 APP 鐨勭綉缁滃畨鍏ㄩ兘寰楀埌浜嗘瀬澶х殑闃叉姢銆?/p>
鍥涖€佹€荤粨
瀵逛簬鐑洿鏂拌繖浠朵簨锛屾牴鎹?Apple 鐨勫簲鐢ㄨ鑼冿紝鍩轰簬 JavaScriptCore 鐨勭儹鏇存柊鏄畬鍏ㄥ彲琛岀殑锛屼絾鍓嶆彁鏄綘蹇呴』瀹堣鐭╋紝涓嶈兘鑴辩 Apple 鐨勬帉鎺ц寖鍥达紱浣嗘槸 App Store 鐨勫鏍歌鍒欏張鏋佸叾涓嶉€忔槑锛岃櫧鐒舵垜浠槸鑹皯锛屼絾鏄竴瀹氱▼搴︿笂杩樻槸瑕侀殣钘忎竴涓嬬儹鏇存柊 bundle锛岃閬夸笉蹇呰鐨勯夯鐑︼紱闅愯棌鐑洿鏂?bundle 鎴戜滑鍙互浠庝俊婧愬姞瀵嗗拰淇￠亾鍔犲瘑涓や釜瑙掑害鍘绘€濊€冿紝缁煎悎鏉ョ湅灏辨槸鐏垫椿鍒╃敤瀵嗙爜瀛︾煡璇嗭紝瀵圭綉缁滄暟鎹繘琛屽姞瀵嗭紝闃叉琚娴嬪嚭寮傚父娴侀噺锛岄殣钘?bundle 鐨勫悓鏃讹紝涔熶繚鎶や簡鐢ㄦ埛鐨勬暟鎹畨鍏紝闄嶄綆琚敾鍑荤殑鍙兘鎬с€?/p>
浜斻€佸弬鑰冮槄璇?/h2>
馃嵍 涓轰粈涔堜綘鐨?Charles 浼氭姄鍖呭け璐ワ紵
濡傛灉浣犲枩娆㈡垜鐨勬枃绔狅紝甯屾湜鐐硅禐馃憤 鏀惰棌 馃搧 鍦ㄧ湅 馃専 涓夎繛鏀寔涓€涓嬶紒锛侊紒璋㈣阿浣狅紝杩欏鎴戠湡鐨勫緢閲嶈锛?/blockquote>娆㈣繋澶у鍏虫敞鎴戠殑寰俊鍏紬鍙凤細鍗よ泲瀹為獙瀹?/strong>锛岀洰鍓嶄笓娉ㄥ墠绔妧鏈紝瀵瑰浘褰㈠涔熸湁涓€浜涘井灏忕爺绌躲€?/p>
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