1 line
1.8 KiB
JavaScript
1 line
1.8 KiB
JavaScript
"use strict";Object.defineProperty(exports,"__esModule",{value:true});exports["default"]=void 0;var _buffer=require("buffer");var _permute=_interopRequireDefault(require("./permute"));function _interopRequireDefault(obj){return obj&&obj.__esModule?obj:{"default":obj}}var allowedCapacityValues=[224,256,384,512];var writeState=function writeState(I,O){for(var i=0;i<I.length;i+=8){var o=i/4;O[o]^=I[i+7]<<24|I[i+6]<<16|I[i+5]<<8|I[i+4];O[o+1]^=I[i+3]<<24|I[i+2]<<16|I[i+1]<<8|I[i]}};var readHash=function readHash(I,n){var O=_buffer.Buffer.allocUnsafe(n);for(var o=0;o<n;o+=8){var i=o/4;O[o]=I[i+1];O[o+1]=I[i+1]>>>8;O[o+2]=I[i+1]>>>16;O[o+3]=I[i+1]>>>24;O[o+4]=I[i];O[o+5]=I[i]>>>8;O[o+6]=I[i]>>>16;O[o+7]=I[i]>>>24}return O};var Sponge=function Sponge(_ref){var _this=this;var capacity=_ref.capacity,padding=_ref.padding;if(!allowedCapacityValues.includes(capacity)){throw new Error("Unsupported hash length")}var keccak=(0,_permute["default"])();var stateSize=200;var hashSize=capacity/8;var queueSize=stateSize-hashSize*2;var queueOffset=0;var state=new Uint32Array(stateSize/4);var queue=_buffer.Buffer.allocUnsafe(queueSize);this.absorb=function(buffer){for(var i=0;i<buffer.length;i++){queue[queueOffset]=buffer[i];queueOffset+=1;if(queueOffset>=queueSize){writeState(queue,state);keccak(state);queueOffset=0}}return _this};this.squeeze=function(){var output={queue:_buffer.Buffer.allocUnsafe(queueSize),state:new Uint32Array(stateSize/4)};queue.copy(output.queue);for(var i=0;i<state.length;i++){output.state[i]=state[i]}output.queue.fill(0,queueOffset);output.queue[queueOffset]|=padding;output.queue[queueSize-1]|=128;writeState(output.queue,output.state);keccak(output.state);return readHash(output.state,hashSize)};this.reset=function(){queue.fill(0);state.fill(0);queueOffset=0;return _this};return this};var _default=Sponge;exports["default"]=_default; |