https://limewire.com/build/workers/content-item-decrypter.worker-CKUlJ-H0.js

1(function(){"use strict";const _=t=>{const{baseDelay:e=250,minDelay:r=0,maxDelay:n=1/0,maxRetryCount:a=1/0}=t||{};return s=>{if(!(s>a-1))return Math.max(r,Math.min(n,s&&e*Math.pow(2,s-1)))}},g="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",A=typeof Uint8Array>"u"?[]:new Uint8Array(256);for(let t=0;t<g.length;t++)A[g.charCodeAt(t)]=t;const b=t=>{let e=t.length*.75,r=0,n,a,s,o;t[t.length-1]==="="&&(e--,t[t.length-2]==="="&&e--);const c=new ArrayBuffer(e),y=new Uint8Array(c);for(let p=0;p<t.length;p+=4)n=A[t.charCodeAt(p)],a=A[t.charCodeAt(p+1)],s=A[t.charCodeAt(p+2)],o=A[t.charCodeAt(p+3)],y[r++]=n<<2|a>>4,y[r++]=(a&15)<<4|s>>2,y[r++]=(s&3)<<6|o&63;return c},C=t=>{const e=new Uint8Array(t),r=e.length;let n="";for(let a=0;a<r;a+=3)n+=g[e[a]>>2],n+=g[(e[a]&3)<<4|e[a+1]>>4],n+=g[(e[a+1]&15)<<2|e[a+2]>>6],n+=g[e[a+2]&63];return r%3===2?n=n.substring(0,n.length-1)+"=":r%3===1&&(n=n.substring(0,n.length-2)+"=="),n},V=t=>{if(!t)return"";let e=t.replace(/-/g,"+").replace(/_/g,"/");const r=4-e.length%4;return r!==4&&(e+="=".repeat(r)),e},P=()=>{let t,e;const r=new Promise((n,a)=>{t=n,e=a});if(!t||!e)throw new Error("Missing Resolvers");return{promise:r,resolve:t,reject:e}},H=t=>({ok:!0,value:t}),K=t=>({ok:!1,error:t}),S=(t,e)=>t instanceof Error?t:typeof DOMException=="function"&&t instanceof DOMException?new Error(`DOMException: ${t.name} ${t.message}`):(typeof e=="function"?e(t):e)||new Error(`${t}`),D=new WeakMap,J=(t,...e)=>{const r=e.filter(a=>a instanceof AbortSignal);if(!r.length)return;const n=D.get(t)||new WeakSet;D.set(t,n);for(const a of r){if(t.signal.aborted)break;if(n.has(a))continue;const s=()=>{t.abort(a.reason),a.removeEventListener("abort",s),D.delete(t),n.delete(a)};a.aborted?s():(n.add(a),a.addEventListener("abort",s))}};class E extends Error{constructor(e,r){super(e.message),this.underlyingError=e,this.response=r}}const q=async(t,e)=>typeof t=="function"?t(e):t,Q=async(t,e,r)=>{if(typeof t=="number")return t;if(typeof t=="function")return t==null?void 0:t(e,r);if(Array.isArray(t))return t[e]},O=(t,e)=>{const{init:r,inspect:n,retry:a,timeout:s}=e||{},{promise:o,resolve:c}=P(),y=new AbortController,p=i=>{c(i),d!==null&&clearTimeout(d),y.signal.aborted||y.abort(i)},w=async i=>{const l=i&&!i.ok&&i.error||null,h=await q(r,l)||{};J(y,h.signal);const f=await fetch(t,{...h}).then(H);return await(n==null?void 0:n(f.value,l))||f};let d=null,m=0;return s&&(d=setTimeout(()=>p(K(new E(new Error(`The extended-fetch timeout of ${s}ms has been exceeded`)))),s)),y.signal.addEventListener("abort",()=>{const{reason:i}=y.signal;p(K(new E(S(i,new Error(`Extended-fetch aborted: ${i}`)))))}),(async()=>{let i=null;try{for(;!y.signal.aborted&&(i=await w(i).catch(f=>K(new E(S(f,new Error(`Extended-fetch fetch error: ${f}`))))),!i.ok);){const l=await Q(a,m,i.error).catch(()=>null);if(typeof l!="number")break;const h=Math.max(0,l);h&&await new Promise(f=>setTimeout(f,h)),m++}p(i||K(new E(new Error("No extended-fetch result"))))}catch(l){p(K(new E(new Error(`Extended-fetch error: ${l}`))))}})(),o},v=256,M=["encrypt","decrypt"],Z={ASYMMETRIC_PRIVATE_KEY:{keyFormat:"jwk",keyProperties:{name:"ECDH",namedCurve:"P-256"},keyUsages:["deriveBits","deriveKey"]},"SYMMETRIC_AES-GCM_KEY":{keyFormat:"raw",keyProperties:{name:"AES-GCM",length:v},keyUsages:M},"SYMMETRIC_AES-CTR_KEY":{keyFormat:"raw",keyProperties:{name:"AES-CTR",length:v},keyUsages:M},WRAPPING_KEY:{keyFormat:"raw",keyProperties:{name:"AES-KW",length:v},keyUsages:["wrapKey","unwrapKey"]},WRAPPED_ASYMMETRIC_PRIVATE_KEY:{keyFormat:"raw",keyProperties:{name:"AES-CTR"},keyUsages:["wrapKey"]}},R=new Map,N=new Map;class u{static getKeyProperties(e){return Z[e]}async createKeyWrappingKey(){const e=u.getKeyProperties("WRAPPING_KEY");return crypto.subtle.generateKey(e.keyProperties,!0,e.keyUsages)}async createEncryptionAesCryptoKey(e){const r=u.getKeyProperties(e);return{aesKeyType:e,cryptoKey:await crypto.subtle.generateKey(r.keyProperties,!0,r.keyUsages)}}async deriveEncryptionKeyFromAesKey(e,r){const n=u.getKeyProperties(e.aesKeyType),a=await crypto.subtle.exportKey("raw",e.cryptoKey),s=await crypto.subtle.importKey("raw",a,"HKDF",!1,["deriveKey"]),o=new TextEncoder;return{aesKeyType:e.aesKeyType,cryptoKey:await crypto.subtle.deriveKey({name:"HKDF",hash:"SHA-256",info:o.encode(r),salt:o.encode("no-salt-because-it-needs-to-be-deterministic")},s,n.keyProperties,!0,n.keyUsages)}}async serializeEncryptionAesCryptoKey({aesKeyType:e,cryptoKey:r}){return{aesKeyType:e,jwk:await crypto.subtle.exportKey("jwk",r)}}async deserializeEncryptionAesCryptoKey({aesKeyType:e,jwk:r}){const n=u.getKeyProperties(e);return{aesKeyType:e,cryptoKey:await crypto.subtle.importKey("jwk",r,n.keyProperties,!0,n.keyUsages)}}randomSalt(){return crypto.getRandomValues(new Uint8Array(16))}async wrapWithPassphrase(e,r,n){const a=await this.generateWrappingKeyFromPassphrase(e,r),s=this.getWrappingFormat(n);return crypto.subtle.wrapKey(s,n,a,"AES-KW")}async extractPrivateKeyAndWrapWithPassphrase(e,r,n){const a=await this.generateWrappingKeyFromPassphrase(e,r);return this.extractPrivateKeyAndWrapWithWrappingKey(a,n)}async unwrapKeyWithPassphrase(e,r,n,a){const s=`${a}_${e}_${C(r)}_${C(n)}`,o=N.get(s);if(o)return o;const c=await this.generateWrappingKeyFromPassphrase(e,r),{keyFormat:y,keyProperties:p,keyUsages:w}=u.getKeyProperties(a),d=await crypto.subtle.unwrapKey(y,n,c,"AES-KW",p,!0,w);return N.set(s,d),d}async unwrapKeyWithWrappingKey(e,r,n){const{keyFormat:a,keyProperties:s,keyUsages:o}=u.getKeyProperties(n);return crypto.subtle.unwrapKey(a,r,e,"AES-KW",s,!0,o)}wrapWithWrappingKey(e,r){return crypto.subtle.wrapKey(this.getWrappingFormat(r),r,e,"AES-KW")}async extractPrivateKeyAndWrapWithWrappingKey(e,r){const n=await this.extractPrivateKey(r),a=await crypto.subtle.importKey("raw",b(n),{name:"AES-CTR"},!0,["wrapKey"]);return crypto.subtle.wrapKey("raw",a,e,"AES-KW")}async encryptAesGcm(e,r,n){const a=await crypto.subtle.encrypt({name:"AES-GCM",iv:n},e.cryptoKey,r);return{iv:n,encryptedData:a}}async encryptAesCtr(e,r,n,a){const s=this.getAesCtrNonce(n,a),o=await crypto.subtle.encrypt({name:"AES-CTR",counter:s,length:40},e.cryptoKey,r),c=a+Math.ceil(r.byteLength/16);return{iv:n,encryptedData:o,newCounter:c}}getAesCtrNonce(e,r){if(e.byteLength!==11)throw new Error("IV must be 11 bytes");if(r<0||r>0xffffffffff||!Number.isInteger(r))throw new Error("Counter must be a non-negative integer not exceeding 40 bits");const n=new ArrayBuffer(16);new Uint8Array(n).set(new Uint8Array(e),0);const s=new DataView(n,11,5);return s.setUint32(0,Math.floor(r/256),!1),s.setUint8(4,r%256),n}decryptAesGcm(e,r,n){return n.byteLength===0?new ArrayBuffer(0):crypto.subtle.decrypt({

1name:"AES-GCM",iv:r},e.cryptoKey,n)}async decryptAesCtr(e,r,n,a){if(a.byteLength==0)return{decryptedData:new ArrayBuffer(0),newCounter:n};const o={name:"AES-CTR",counter:this.getAesCtrNonce(r,n),length:40},c=await crypto.subtle.decrypt(o,e.cryptoKey,a),y=n+Math.ceil(a.byteLength/16);return{decryptedData:c,newCounter:y}}async exportPrivateKey(e){return JSON.stringify(await crypto.subtle.exportKey("jwk",e))}async importPrivateKey(e){const{keyProperties:r}=u.getKeyProperties("ASYMMETRIC_PRIVATE_KEY");return await crypto.subtle.importKey("jwk",e,r,!0,["deriveKey","deriveBits"])}async generateWrappingKeyFromPassphrase(e,r){const n=`${e}_${C(r)}`,a=R.get(n);if(a)return a;const s=await crypto.subtle.importKey("raw",new TextEncoder().encode(e),{name:"PBKDF2"},!1,["deriveBits","deriveKey"]),o=u.getKeyProperties("WRAPPING_KEY"),c=await crypto.subtle.deriveKey({name:"PBKDF2",iterations:1e5,hash:"SHA-256",salt:r},s,o.keyProperties,!0,o.keyUsages);return R.set(n,c),c}getWrappingFormat(e){switch(e.type){case"private":return"jwk";case"public":case"secret":return"raw";default:throw new Error("Unsupported")}}async extractPrivateKey(e){if(e.type==="secret")return C(await crypto.subtle.exportKey("raw",e));const n=(await crypto.subtle.exportKey("jwk",e)).d;if(!n)throw Error("Could not extract private-key part");return V(n)}}const T=async t=>{const e=new u,[r,n]=await Promise.all([e.deserializeEncryptionAesCryptoKey(t.aesGcmJwk),e.deserializeEncryptionAesCryptoKey(t.aesCtrJwk)]);return{aesGcmCryptoKey:r,aesCtrCryptoKey:n}};var k={staticContentItemEncryptionIvs:{mainFileNameBase64:"EtrUFVLIRAW8aUCd",mainFileBase64:"C8aZG384/qPpBzg=",mainFileSha1Base64:"6Q+YlJkg8RFR/FHN",previewFileBase64:"i3iv8Nv2xEje9VE="}};class U{constructor(e){this.decryptionKeys=e,this.utf8TextDecoder=new TextDecoder,this.symmetricKeyService=new u}async decryptContentItemFileName(e){return this.utf8TextDecoder.decode(await this.decryptAesGcm(b(e.nameEncrypted),k.staticContentItemEncryptionIvs.mainFileNameBase64))}async decryptContentItemSha1(e){return this.decryptAesGcm(b(e.sha1Encrypted),k.staticContentItemEncryptionIvs.mainFileSha1Base64)}decryptContentItemFileStream(e,r){return this.decryptAesCtr(e,k.staticContentItemEncryptionIvs.mainFileBase64,r)}decryptPreviewFileContents(e){return this.decryptAesCtr(e,k.staticContentItemEncryptionIvs.previewFileBase64)}async decryptAesGcm(e,r){return this.symmetricKeyService.decryptAesGcm(this.decryptionKeys.aesGcmCryptoKey,b(r),e)}decryptAesCtr(e,r,n=0){if(n%16)throw new Error("decryptAesCtr: byteOffset must be aligned to block size (multiple of 16)");const a=this.symmetricKeyService,s=b(r);let o=n/16,c=new Uint8Array(0);const y=new TransformStream({transform:async(p,w)=>{const d=new Uint8Array(c.byteLength+p.byteLength);d.set(c,0),d.set(new Uint8Array(p),c.byteLength);const m=Math.floor(d.byteLength/16)*16,i=d.slice(0,m),{decryptedData:l,newCounter:h}=await a.decryptAesCtr(this.decryptionKeys.aesCtrCryptoKey,s,o,i);w.enqueue(new Uint8Array(l)),c=d.slice(m),o=h},flush:async p=>{if(c.byteLength>0){const{decryptedData:w,newCounter:d}=await a.decryptAesCtr(this.decryptionKeys.aesCtrCryptoKey,s,o,c);p.enqueue(new Uint8Array(w)),o=d}}});return e.pipeThrough(y)}}const B=typeof WorkerGlobalScope<"u"&&self instanceof WorkerGlobalScope,G=typeof SharedWorkerGlobalScope<"u"&&self instanceof SharedWorkerGlobalScope,X=_({maxDelay:45e3}),F=new Map,I=new Map,L=t=>`${t.id}${t.nameEncrypted}`,$=(t,e)=>`${t.id}${e==null?void 0:e.id}`,W=new Set,x=new Set,ee=6,Y=()=>{const t=Array.from(W)[0];t&&(x.add(t),W.delete(t),t().then(()=>{x.delete(t),Y()}))},j=t=>{W.add(t),x.size<ee&&Y()},z=t=>async e=>{const{data:r}=e;switch(r.type){case"decryptName":{t({type:"decryptName",contentItem:r.contentItem,decryptedName:await te(await T(r.decryptionKeysSerialized),r.contentItem)});break}case"downloadAndDecryptData":{const{contentItem:n,previewItem:a,downloadUrl:s,decryptionKeysSerialized:o}=r;t({type:"downloadAndDecryptData",contentItem:n,previewItem:a,downloadUrl:s,decryptedData:await re(s,await T(o),n,a)});break}case"cachedDecryptedName":{t({type:"cachedDecryptedName",contentItem:r.contentItem,decryptedName:await F.get(L(r.contentItem))});break}case"cachedDecryptedData":{t({type:"cachedDecryptedData",contentItem:r.contentItem,previewItem:r.previewItem,decryptedData:await I.get($(r.contentItem,r.previewItem))});break}}};(B||G)&&(addEventListener("error",({error:t})=>{throw t instanceof Error?t:typeof t=="string"?new Error(t):new Error(`[Content Item Decrypter worker] error: ${t}`)}),addEventListener("unhandledrejection",({reason:t})=>{throw t instanceof Error?t:typeof t=="string"?new Error(t):new Error(`[Content Item Decrypter worker] unhandledrejection: ${t}`)})),B&&addEventListener("message",z(t=>postMessage(t))),G&&self.addEventListener("connect",e=>

1{e.ports.forEach(r=>{r.addEventListener("message",z(n=>r.postMessage(n))),r.start()})});async function te(t,e){const r=L(e),n=F.get(r);if(n)return n;const a=new U(t),{promise:s,resolve:o}=P();return F.set(r,s),j(async()=>{const y=await a.decryptContentItemFileName(e);o(y)}),s}async function re(t,e,r,n){const a=$(r,n),s=I.get(a);if(s)return s;const o=new U(e),{promise:c,resolve:y}=P();return I.set(a,c),j(async()=>{const w=await O(t,{retry:X,inspect:l=>l.status!==200&&K(new E(new Error(`Could not download from "${t}"`),l))});if(!w.ok||!w.value.body)throw new Error(`Download failed from "${t}"`);const m=(n?o.decryptPreviewFileContents(w.value.body):o.decryptContentItemFileStream(w.value.body)).getReader();let i=new Blob;for(;;){const{value:l,done:h}=await m.read();if(h)break;i=new Blob([i,l],{type:(n==null?void 0:n.mediaType)??r.mediaType})}y(i)}),c}})();
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