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@@ -19,7 +19,7 @@
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*
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*
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* @namespace
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* @namespace
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*/
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*/
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-var Sha256 = {};
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+let Sha256 = {};
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/**
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/**
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@@ -34,8 +34,8 @@ var Sha256 = {};
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* @returns {string} Hash of msg as hex character string.
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* @returns {string} Hash of msg as hex character string.
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*/
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*/
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Sha256.hash = function(msg, options) {
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Sha256.hash = function(msg, options) {
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- var defaults = { msgFormat: 'string', outFormat: 'hex' };
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- var opt = Object.assign(defaults, options);
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+ let defaults = { msgFormat: 'string', outFormat: 'hex' };
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+ let opt = Object.assign(defaults, options);
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// note use throughout this routine of 'n >>> 0' to coerce Number 'n' to unsigned 32-bit integer
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// note use throughout this routine of 'n >>> 0' to coerce Number 'n' to unsigned 32-bit integer
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@@ -46,7 +46,7 @@ Sha256.hash = function(msg, options) {
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}
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}
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// constants [§4.2.2]
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// constants [§4.2.2]
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- var K = [
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+ let K = [
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0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
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0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
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0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
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0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
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0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
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0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
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@@ -57,7 +57,7 @@ Sha256.hash = function(msg, options) {
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0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2 ];
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0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2 ];
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// initial hash value [§5.3.3]
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// initial hash value [§5.3.3]
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- var H = [
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+ let H = [
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0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19 ];
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0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19 ];
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// PREPROCESSING [§6.2.1]
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// PREPROCESSING [§6.2.1]
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@@ -65,13 +65,13 @@ Sha256.hash = function(msg, options) {
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msg += String.fromCharCode(0x80); // add trailing '1' bit (+ 0's padding) to string [§5.1.1]
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msg += String.fromCharCode(0x80); // add trailing '1' bit (+ 0's padding) to string [§5.1.1]
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// convert string msg into 512-bit blocks (array of 16 32-bit integers) [§5.2.1]
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// convert string msg into 512-bit blocks (array of 16 32-bit integers) [§5.2.1]
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- var l = msg.length/4 + 2; // length (in 32-bit integers) of msg + ‘1’ + appended length
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- var N = Math.ceil(l/16); // number of 16-integer (512-bit) blocks required to hold 'l' ints
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- var M = new Array(N); // message M is N×16 array of 32-bit integers
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+ let l = msg.length/4 + 2; // length (in 32-bit integers) of msg + ‘1’ + appended length
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+ let N = Math.ceil(l/16); // number of 16-integer (512-bit) blocks required to hold 'l' ints
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+ let M = new Array(N); // message M is N×16 array of 32-bit integers
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- for (var i=0; i<N; i++) {
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+ for (let i=0; i<N; i++) {
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M[i] = new Array(16);
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M[i] = new Array(16);
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- for (var j=0; j<16; j++) { // encode 4 chars per integer (64 per block), big-endian encoding
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+ for (let j=0; j<16; j++) { // encode 4 chars per integer (64 per block), big-endian encoding
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M[i][j] = (msg.charCodeAt(i*64+j*4)<<24) | (msg.charCodeAt(i*64+j*4+1)<<16) |
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M[i][j] = (msg.charCodeAt(i*64+j*4)<<24) | (msg.charCodeAt(i*64+j*4+1)<<16) |
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(msg.charCodeAt(i*64+j*4+2)<<8) | (msg.charCodeAt(i*64+j*4+3));
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(msg.charCodeAt(i*64+j*4+2)<<8) | (msg.charCodeAt(i*64+j*4+3));
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} // note running off the end of msg is ok 'cos bitwise ops on NaN return 0
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} // note running off the end of msg is ok 'cos bitwise ops on NaN return 0
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@@ -79,30 +79,30 @@ Sha256.hash = function(msg, options) {
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// add length (in bits) into final pair of 32-bit integers (big-endian) [§5.1.1]
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// add length (in bits) into final pair of 32-bit integers (big-endian) [§5.1.1]
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// note: most significant word would be (len-1)*8 >>> 32, but since JS converts
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// note: most significant word would be (len-1)*8 >>> 32, but since JS converts
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// bitwise-op args to 32 bits, we need to simulate this by arithmetic operators
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// bitwise-op args to 32 bits, we need to simulate this by arithmetic operators
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- var lenHi = ((msg.length-1)*8) / Math.pow(2, 32);
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- var lenLo = ((msg.length-1)*8) >>> 0;
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+ let lenHi = ((msg.length-1)*8) / Math.pow(2, 32);
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+ let lenLo = ((msg.length-1)*8) >>> 0;
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M[N-1][14] = Math.floor(lenHi);
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M[N-1][14] = Math.floor(lenHi);
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M[N-1][15] = lenLo;
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M[N-1][15] = lenLo;
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// HASH COMPUTATION [§6.2.2]
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// HASH COMPUTATION [§6.2.2]
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- for (var i=0; i<N; i++) {
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- var W = new Array(64);
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+ for (let i=0; i<N; i++) {
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+ let W = new Array(64);
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// 1 - prepare message schedule 'W'
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// 1 - prepare message schedule 'W'
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- for (var t=0; t<16; t++) W[t] = M[i][t];
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- for (var t=16; t<64; t++) {
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+ for (let t=0; t<16; t++) W[t] = M[i][t];
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+ for (let t=16; t<64; t++) {
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W[t] = (Sha256.σ1(W[t-2]) + W[t-7] + Sha256.σ0(W[t-15]) + W[t-16]) >>> 0;
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W[t] = (Sha256.σ1(W[t-2]) + W[t-7] + Sha256.σ0(W[t-15]) + W[t-16]) >>> 0;
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}
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}
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// 2 - initialise working variables a, b, c, d, e, f, g, h with previous hash value
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// 2 - initialise working variables a, b, c, d, e, f, g, h with previous hash value
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- var a = H[0], b = H[1], c = H[2], d = H[3], e = H[4], f = H[5], g = H[6], h = H[7];
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+ let a = H[0], b = H[1], c = H[2], d = H[3], e = H[4], f = H[5], g = H[6], h = H[7];
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// 3 - main loop (note 'addition modulo 2^32')
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// 3 - main loop (note 'addition modulo 2^32')
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- for (var t=0; t<64; t++) {
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- var T1 = h + Sha256.Σ1(e) + Sha256.Ch(e, f, g) + K[t] + W[t];
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- var T2 = Sha256.Σ0(a) + Sha256.Maj(a, b, c);
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+ for (let t=0; t<64; t++) {
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+ let T1 = h + Sha256.Σ1(e) + Sha256.Ch(e, f, g) + K[t] + W[t];
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+ let T2 = Sha256.Σ0(a) + Sha256.Maj(a, b, c);
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h = g;
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h = g;
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g = f;
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g = f;
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f = e;
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f = e;
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@@ -125,10 +125,10 @@ Sha256.hash = function(msg, options) {
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}
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}
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// convert H0..H7 to hex strings (with leading zeros)
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// convert H0..H7 to hex strings (with leading zeros)
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- for (var h=0; h<H.length; h++) H[h] = ('00000000'+H[h].toString(16)).slice(-8);
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+ for (let h=0; h<H.length; h++) H[h] = ('00000000'+H[h].toString(16)).slice(-8);
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// concatenate H0..H7, with separator if required
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// concatenate H0..H7, with separator if required
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- var separator = opt.outFormat=='hex-w' ? ' ' : '';
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+ let separator = opt.outFormat=='hex-w' ? ' ' : '';
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return H.join(separator);
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return H.join(separator);
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};
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};
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@@ -170,8 +170,8 @@ Sha256.utf8Encode = function(str) {
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*/
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*/
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Sha256.hexBytesToString = function(hexStr) {
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Sha256.hexBytesToString = function(hexStr) {
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hexStr = hexStr.replace(' ', ''); // allow space-separated groups
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hexStr = hexStr.replace(' ', ''); // allow space-separated groups
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- var str = '';
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- for (var i=0; i<hexStr.length; i+=2) {
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+ let str = '';
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+ for (let i=0; i<hexStr.length; i+=2) {
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str += String.fromCharCode(parseInt(hexStr.slice(i, i+2), 16));
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str += String.fromCharCode(parseInt(hexStr.slice(i, i+2), 16));
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}
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}
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return str;
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return str;
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