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this.trackId}setVideoCodec(e){this.videoCodec=e}setRtpMap(e){this.rtpMap=e}setupTransform(e,t,n,r,i,o){if(o&&(u.info("setting codec on cryptor to",{codec:o}),this.videoCodec=o),u.debug("Setting up frame cryptor transform",Object.assign({operation:e,passedTrackId:r,codec:o},this.logContext)),i&&this.isTransformActive)return void u.debug("reuse transform",Object.assign({},this.logContext));const s="encode"===e?this.encodeFunction:this.decodeFunction,a=new TransformStream({transform:s.bind(this)});this.isTransformActive=!0,t.pipeThrough(a).pipeTo(n).catch(e=>{u.warn(e),this.emit(S.Error,e instanceof E?e:new E(e.message,void 0,this.participantIdentity))}).finally(()=>{this.isTransformActive=!1}),this.trackId=r}setSifTrailer(e){u.debug("setting SIF trailer",Object.assign(Object.assign({},this.logContext),{trailer:e})),this.sifTrailer=e}encodeFunction(t,n){return e(this,void 0,void 0,function*(){var e;if(!this.isEnabled()||0===t.data.byteLength)return n.enqueue(t);const r=this.keys.getKeySet();if(!r)return void this.emit(S.Error,new E("key set not found for ".concat(this.participantIdentity," at index ").concat(this.keys.getCurrentKeyIndex()),b.MissingKey,this.participantIdentity));const{encryptionKey:i}=r,o=this.keys.getCurrentKeyIndex();if(i){const r=this.makeIV(null!==(e=t.getMetadata().synchronizationSource)&&void 0!==e?e:-1,t.timestamp);let a=this.getUnencryptedBytes(t);const c=new Uint8Array(t.data,0,a.unencryptedBytes),d=new Uint8Array(2);d[0]=12,d[1]=o;try{const e=yield crypto.subtle.encrypt({name:f,iv:r,additionalData:new Uint8Array(t.data,0,c.byteLength)},i,new Uint8Array(t.data,a.unencryptedBytes));let o=new Uint8Array(e.byteLength+r.byteLength+d.byteLength);o.set(new Uint8Array(e)),o.set(new Uint8Array(r),e.byteLength),o.set(d,e.byteLength+r.byteLength),a.requiresNALUProcessing&&(o=function(e){const t=[];for(var n=0,r=0;r<e.length;++r){var i=e[r];i<=3&&n>=2&&(t.push(3),n=0),t.push(i),0==i?++n:n=0}return new Uint8Array(t)}(o));var s=new Uint8Array(c.byteLength+o.byteLength);return s.set(c),s.set(o,c.byteLength),t.data=s.buffer,n.enqueue(t)}catch(e){u.error(e)}}else u.debug("failed to encrypt, emitting error",this.logContext),this.emit(S.Error,new E("encryption key missing for encoding",b.MissingKey,this.participantIdentity))})}decodeFunction(t,n){return e(this,void 0,void 0,function*(){if(!this.isEnabled()||0===t.data.byteLength)return n.enqueue(t);if(function(e,t){if(0===t.byteLength)return!1;const n=new Uint8Array(e.slice(e.byteLength-t.byteLength));return t.every((e,t)=>e===n[t])}(t.data,this.sifTrailer))return t.data=t.data.slice(0,t.data.byteLength-this.sifTrailer.byteLength),(yield z(t.data))?(u.debug("enqueue SIF",this.logContext),n.enqueue(t)):void u.warn("Unexpected SIF frame payload, dropping frame",this.logContext);const e=new Uint8Array(t.data)[t.data.byteLength-1];if(!this.keys.hasInvalidKeyAtIndex(e))if(this.keys.getKeySet(e))try{const r=yield this.decryptFrame(t,e);if(this.keys.decryptionSuccess(e),r)return n.enqueue(r)}catch(t){t instanceof E&&t.reason===b.InvalidKey?this.keys.hasValidKey&&(this.emit(S.Error,t),this.keys.decryptionFailure(e)):u.warn("decoding frame failed",{error:t})}else u.warn("skipping decryption due to missing key at index ".concat(e)),this.emit(S.Error,new E("missing key at index ".concat(e," for participant ").concat(this.participantIdentity),b.MissingKey,this.participantIdentity)),this.keys.decryptionFailure(e)})}decryptFrame(t,n){return e(this,arguments,void 0,function(e,t){var n=this;let r=arguments.length>2&&void 0!==arguments[2]?arguments[2]:void 0,i=arguments.length>3&&void 0!==arguments[3]?arguments[3]:{ratchetCount:0};return function*(){var o;const s=n.keys.getKeySet(t);if(!i.encryptionKey&&!s)throw new TypeError("no encryption key found for decryption of ".concat(n.participantIdentity));let a=n.getUnencryptedBytes(e);try{const t=new Uint8Array(e.data,0,a.unencryptedBytes);var c=new Uint8Array(e.data,t.length,e.data.byteLength-t.length);if(a.requiresNALUProcessing&&function(e){for(var t=0;t<e.length-3;t++)if(0==e[t]&&0==e[t+1]&&3==e[t+2])return!0;return!1}(c)){c=function(e){const t=[];for(var n=e.length,r=0;r<e.length;)n-r>=3&&!e[r]&&!e[r+1]&&3==e[r+2]?(t.push(e[r++]),t.push(e[r++]),r++):t.push(e[r++]);return new Uint8Array(t)}(c);const n=new Uint8Array(t.byteLength+c.byteLength);n.set(t),n.set(c,t.byteLength),e.data=n.buffer}const n=new Uint8Array(e.data,e.data.byteLength-2,2),r=n[0],d=new Uint8Array(e.data,e.data.byteLength-r-n.byteLength,r),u=t.byteLength,l=e.data.byteLength-(t.byteLength+r+n.byteLength),y=yield crypto.subtle.decrypt({name:f,iv:d,additionalData:new Uint8Array(e.data,0,t.byteLength)},null!==(o=i.encryptionKey)&&void 0!==o?o:s.encryptionKey,new Uint8Array(e.data,u,l)),p=new ArrayBuffer(t.byteLength+y.byteLength),h=new Uint8Array(p);return h.set(new Uint8Array(e.data,0,t.byteLength)),h.set(new Uint8Array(y),t.byteLength),e.data=p,e}catch(o){if(n.keyProviderOptions.ratchetWindowSize>0){if(i.ratchetCount<n.keyProviderOptions.ratchetWindowSize){let o,a;u.debug("ratcheting key attempt ".concat(i.ratchetCount," of ").concat(n.keyProviderOptions.ratchetWindowSize,", for kind ").concat(e instanceof RTCEncodedAudioFrame?"audio":"video")),(r??s)===n.keys.getKeySet(t)&&(a=yield n.keys.ratchetKey(t,!1),o=yield N(a.cryptoKey,n.keyProviderOptions.ratchetSalt));const c=yield n.decryptFrame(e,t,r||s,{ratchetCount:i.ratchetCount+1,encryptionKey:o?.encryptionKey});return c&&o&&(r??s)===n.keys.getKeySet(t)&&(n.keys.setKeySet(o,t,a),n.keys.setCurrentKeyIndex(t)),c}throw u.warn("maximum ratchet attempts exceeded"),new E("valid key missing for participant ".concat(n.participantIdentity),b.InvalidKey,n.participantIdentity)}throw new E("Decryption failed: ".concat(o.message),b.InvalidKey,n.participantIdentity)}}()})}makeIV(e,t){var n;const r=new ArrayBuffer(12),i=new DataView(r);this.sendCounts.has(e)||this.sendCounts.set(e,Math.floor(65535*Math.random()));const o=null!==(n=this.sendCounts.get(e))&&void 0!==n?n:0;return i.setUint32(0,e),i.setUint32(4,t),i.setUint32(8,t-o%65535),this.sendCounts.set(e,o+1),r}getUnencryptedBytes(e){var t;if(!function(e){return"type"in e}(e))return{unencryptedBytes:g.audio,requiresNALUProcessing:!1};const n=null!==(t=this.getVideoCodec(e))&&void 0!==t?t:this.videoCodec;if(n!==this.detectedCodec&&(u.debug("detected different codec",Object.assign({detectedCodec:n,oldCodec:this.detectedCodec},this.logContext)),this.detectedCodec=n),"av1"===n)throw new Error("".concat(n," is not yet supported for end to end encryption"));if("vp8"===n)return{unencryptedBytes:g[e.type],requiresNALUProcessing:!1};if("vp9"===n)return{unencryptedBytes:0,requiresNALUProcessing:!1};try{const t="h264"===n||"h265"===n?n:void 0,r=M(new Uint8Array(e.data),t);if(r.requiresNALUProcessing)return{unencryptedBytes:r.unencryptedBytes,requiresNALUProcessing:!0}}catch(e){u.debug("NALU processing failed, falling back to VP8 handling",Object.assign({error:e},this.logContext))}return{unencryptedBytes:g[e.type],requiresNALUProcessing:!1}}getVideoCodec(e){if(0===this.rtpMap.size)return;const t=e.getMetadata().payloadType;return t?this.rtpMap.get(t):void 0}}class Y extends C.EventEmitter{get hasValidKey(){return!this.hasInvalidKeyAtIndex(this.currentKeyIndex)}constructor(e,t){if(super(),this.currentKeyIndex=0,t.keyringSize<1||t.keyringSize>256)throw new TypeError("Keyring size needs to be between 1 and 256");this.cryptoKeyRing=new Array(t.keyringSize).fill(void 0),this.decryptionFailureCounts=new Array(t.keyringSize).fill(0),this.keyProviderOptions=t,this.ratchetPromiseMap=new Map,this.participantIdentity=e}hasInvalidKeyAtIndex(e){return this.keyProviderOptions.failureTolerance>=0&&this.decryptionFailureCounts[e]>this.keyProviderOptions.failureTolerance}decryptionFailure(){let e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:this.currentKeyIndex;this.keyProviderOptions.failureTolerance<0||(this.decryptionFailureCounts[e]+=1,this.decryptionFailureCounts[e]>this.keyProviderOptions.failureTolerance&&u.warn("key for ".concat(this.participantIdentity," at index ").concat(e," is being marked as invalid")))}decryptionSuccess(){let e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:this.currentKeyIndex;this.resetKeyStatus(e)}resetKeyStatus(e){void 0===e?this.decryptionFailureCounts.fill(0):this.decryptionFailureCounts[e]=0}ratchetKey(t){let n=!(arguments.length>1&&void 0!==arguments[1])||arguments[1];const r=t??this.getCurrentKeyIndex(),i=this.ratchetPromiseMap.get(r);if(typeof i<"u")return i;const o=new Promise((t,i)=>e(this,void 0,void 0,function*(){try{const i=this.getKeySet(r);if(!i)throw new TypeError("Cannot ratchet key without a valid keyset of participant ".concat(this.participantIdentity));const o=i.material,s=yield function(t,n){return e(this,void 0,void 0,function*(){const e=P(t.algorithm.name,n);return crypto.subtle.deriveBits(e,t,256)})}(o,this.keyProviderOptions.ratchetSalt),a=yield function(t){return e(this,arguments,void 0,function(e){let t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{name:f},n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:"encrypt";return function*(){return crypto.subtle.importKey("raw",e,t,!1,"derive"===n?["deriveBits","deriveKey"]:["encrypt","decrypt"])}()})}(s,o.algorithm.name,"derive"),c={chainKey:s,cryptoKey:a};n&&(yield this.setKeyFromMaterial(a,r,c)),t(c)}catch(e){i(e)}finally{this.ratchetPromiseMap.delete(r)}}));return this.ratchetPromiseMap.set(r,o),o}setKey(t){return e(this,arguments,void 0,function(e){var t=this;let n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:0;return function*(){yield t.setKeyFromMaterial(e,n),t.resetKeyStatus(n)}()})}setKeyFromMaterial(t,n){return e(this,arguments,void 0,function(e,t){var n=this;let r=arguments.length>2&&void 0!==arguments[2]?arguments[2]:null;return function*(){const i=yield N(e,n.keyProviderOptions.ratchetSalt),o=t>=0?t%n.cryptoKeyRing.length:n.currentKeyIndex;u.debug("setting new key with index ".concat(t),{usage:e.usages,algorithm:e.algorithm,ratchetSalt:n.keyProviderOptions.ratchetSalt}),n.setKeySet(i,o,r),o>=0&&(n.currentKeyIndex=o)}()})}setKeySet(e,t){let n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:null;this.cryptoKeyRing[t%this.cryptoKeyRing.length]=e,n&&this.emit(k.KeyRatcheted,n,this.participantIdentity,t)}setCurrentKeyIndex(t){return e(this,void 0,void 0,function*(){this.currentKeyIndex=t%this.cryptoKeyRing.length,this.resetKeyStatus(t)})}getCurrentKeyIndex(){return this.currentKeyIndex}getKeySet(e){return this.cryptoKeyRing[e??this.currentKeyIndex]}}const Q=[],J=new Map;let Z,$,ee=new class{constructor(){this.pendingTasks=new Map,this.taskMutex=new h,this.nextTaskIndex=0}run(t){return e(this,void 0,void 0,function*(){const e={id:this.nextTaskIndex++,enqueuedAt:Date.now(),status:l.WAITING};this.pendingTasks.set(e.id,e);const n=yield this.taskMutex.lock();try{return e.executedAt=Date.now(),e.status=l.RUNNING,yield t()}finally{e.status=l.COMPLETED,this.pendingTasks.delete(e.id),n()}})}flush(){return e(this,void 0,void 0,function*(){return this.run(()=>e(this,void 0,void 0,function*(){}))})}snapshot(){return Array.from(this.pendingTasks.values())}},te=!1,ne=v,re=new Map;function ie(e,t){let n=Q.filter(e=>e.getTrackId()===t);if(n.length>1){const r=n.map(e=>({participant:e.getParticipantIdentity()})).join(",");u.error("Found multiple cryptors for the same trackID ".concat(t,". target participant: ").concat(e," "),{participants:r})}let r=n[0];if(r)e!==r.getParticipantIdentity()&&r.setParticipant(e,oe(e));else{if(u.info("creating new cryptor for",{participantIdentity:e,trackId:t}),!ne)throw Error("Missing keyProvider options");r=new H({participantIdentity:e,keys:oe(e),keyProviderOptions:ne,sifTrailer:$}),r.setRtpMap(re),function(e){e.on(S.Error,e=>{const t={kind:"error",data:{error:new Error("".concat(b[e.reason],": ").concat(e.message))}};postMessage(t)})}(r),Q.push(r)}return r}function oe(e){if(te)return se();let t=J.get(e);return t||(t=new Y(e,ne),t.on(k.KeyRatcheted,ae),J.set(e,t)),t}function se(){return Z||(u.debug("creating new shared key handler"),Z=new Y("shared-key",ne)),Z}function ae(e,t,n){postMessage({kind:"ratchetKey",data:{participantIdentity:t,keyIndex:n,ratchetResult:e}})}u.setDefaultLevel("info"),onmessage=t=>{ee.run(()=>e(void 0,void 0,void 0,function*(){const{kind:n,data:r}=t.data;switch(n){case"init":u.setLevel(r.loglevel),u.info("worker initialized"),ne=r.keyProviderOptions,te=!!r.keyProviderOptions.sharedKey,postMessage({kind:"initAck",data:{enabled:false}});break;case"enable":(function(e,t){u.debug("setting encryption enabled for all tracks of ".concat(t),{enable:e}),V.set(t,e)})(r.enabled,r.participantIdentity),u.info("updated e2ee enabled status for ".concat(r.participantIdentity," to ").concat(r.enabled)),postMessage(t.data);break;case"decode":case"encode":ie(r.participantIdentity,r.trackId).setupTransform(n,r.readableStream,r.writableStream,r.trackId,r.isReuse,r.codec);break;case"setKey":te?yield function(t,n){return e(this,void 0,void 0,function*(){u.info("set shared key",{index:n}),yield se().setKey(t,n)})}(r.key,r.keyIndex):r.participantIdentity?(u.info("set participant sender key ".concat(r.participantIdentity," index ").concat(r.keyIndex)),yield oe(r.participantIdentity).setKey(r.key,r.keyIndex)):u.error("no participant Id was provided and shared key usage is disabled");break;case"removeTransform":!function(e,t){const n=Q.filter(n=>n.getParticipantIdentity()===t&&n.getTrackId()===e);n.length>1&&u.error("Found multiple cryptors for the same participant and trackID combination",{trackId:e,participantIdentity:t});const r=n[0];r?r.unsetParticipant():u.warn("Could not unset participant on cryptor",{trackId:e,participantIdentity:t})}(r.trackId,r.participantIdentity);break;case"updateCodec":ie(r.participantIdentity,r.trackId).setVideoCodec(r.codec),u.info("updated codec",{participantIdentity:r.participantIdentity,trackId:r.trackId,codec:r.codec});break;case"setRTPMap":re=r.map,Q.forEach(e=>{e.getParticipantIdentity()===r.participantIdentity&&e.setRtpMap(r.map)});break;case"ratchetRequest":!function(t){e(this,void 0,void 0,function*(){if(te){const e=se();yield e.ratchetKey(t.keyIndex),e.resetKeyStatus()}else if(t.participantIdentity){const e=oe(t.participantIdentity);yield e.ratchetKey(t.keyIndex),e.resetKeyStatus()}else u.error("no participant Id was provided for ratchet request and shared key usage is disabled")})}(r);break;case"setSifTrailer":!function(e){$=e,Q.forEach(t=>{t.setSifTrailer(e)})}(r.trailer)}}))},self.RTCTransformEvent&&(u.debug("setup transform event"),self.onrtctransform=e=>{const t=e.transformer;u.debug("transformer",t);const{kind:n,participantIdentity:r,trackId:i,codec:o}=t.options,s=ie(r,i);u.debug("transform",{codec:o}),s.setupTransform(n,t.readable,t.writable,i,!1,o)})}();