如何在JavaScript中生成十六进制二进制数据的sha256哈希?
我需要JavaScript中的一个函数来生成与此命令在linux中生成的结果类似的结果如何在JavaScript中生成十六进制二进制数据的sha256哈希?,javascript,Javascript,我需要JavaScript中的一个函数来生成与此命令在linux中生成的结果类似的结果 echo -n '28349b1d4bcdc9905e4ef9719019e55743c84efa0c5e9a0b077f0b54fcd84905' | xxd -r -p | sha256sum -b | awk '{print $1}' 此命令输出: d533f24d6f28ddcef3f066474f7b8355383e485681ba8e793e037f5cf36e4883 该命令的作用是:给定一
echo -n '28349b1d4bcdc9905e4ef9719019e55743c84efa0c5e9a0b077f0b54fcd84905' | xxd -r -p | sha256sum -b | awk '{print $1}'
此命令输出:
d533f24d6f28ddcef3f066474f7b8355383e485681ba8e793e037f5cf36e4883
该命令的作用是:给定一个十六进制字符串,将其转换为二进制,并显示二进制数据的sha256散列
我尝试了不同的库,但它们只是输出了sha256字符串。
但这并不能满足我的要求,我需要上面命令的准确结果。
有人能帮我吗?新读者注意:这不会像您预期的那样显示字符串的sha256,而是以十六进制表示的二进制数据的sha256,如问题中所述
您可以从Mozilla Developer Network的演示sha256功能中获得灵感:
function arbuf2hex(buffer) {
var hexCodes = [];
var view = new DataView(buffer);
for (var i = 0; i < view.byteLength; i += 4) {
// Using getUint32 reduces the number of iterations needed (we process 4 bytes each time)
var value = view.getUint32(i)
// toString(16) will give the hex representation of the number without padding
var stringValue = value.toString(16)
// We use concatenation and slice for padding
var padding = '00000000'
var paddedValue = (padding + stringValue).slice(-padding.length)
hexCodes.push(paddedValue);
}
// Join all the hex strings into one
return hexCodes.join("");
}
function sha256(hexstr) {
// We transform the string into an arraybuffer.
var buffer = new Uint8Array(hexstr.match(/[\da-f]{2}/gi).map(function (h) {
return parseInt(h, 16)
}));
return crypto.subtle.digest("SHA-256", buffer).then(function (hash) {
return arbuf2hex(hash);
});
}
sha256("28349b1d4bcdc9905e4ef9719019e55743c84efa0c5e9a0b077f0b54fcd84905").then(function(digest) {
console.log(digest);
}); // outputs "d533f24d6f28ddcef3f066474f7b8355383e485681ba8e793e037f5cf36e4883"
函数arbuf2hex(缓冲区){
var hexCodes=[];
变量视图=新数据视图(缓冲区);
对于(变量i=0;i
关键是稍微更改MDN的sha256函数,以便它将十六进制字符串转换为ArrayBuffer,而不仅仅是使用字符串
如果您需要一个同步解决方案,您可以尝试使用它并根据您的需要进行调整。新读者注意:这不会像您预期的那样显示字符串的sha256,而是以十六进制表示的二进制数据的sha256,如问题中所述
您可以从Mozilla Developer Network的演示sha256功能中获得灵感:
function arbuf2hex(buffer) {
var hexCodes = [];
var view = new DataView(buffer);
for (var i = 0; i < view.byteLength; i += 4) {
// Using getUint32 reduces the number of iterations needed (we process 4 bytes each time)
var value = view.getUint32(i)
// toString(16) will give the hex representation of the number without padding
var stringValue = value.toString(16)
// We use concatenation and slice for padding
var padding = '00000000'
var paddedValue = (padding + stringValue).slice(-padding.length)
hexCodes.push(paddedValue);
}
// Join all the hex strings into one
return hexCodes.join("");
}
function sha256(hexstr) {
// We transform the string into an arraybuffer.
var buffer = new Uint8Array(hexstr.match(/[\da-f]{2}/gi).map(function (h) {
return parseInt(h, 16)
}));
return crypto.subtle.digest("SHA-256", buffer).then(function (hash) {
return arbuf2hex(hash);
});
}
sha256("28349b1d4bcdc9905e4ef9719019e55743c84efa0c5e9a0b077f0b54fcd84905").then(function(digest) {
console.log(digest);
}); // outputs "d533f24d6f28ddcef3f066474f7b8355383e485681ba8e793e037f5cf36e4883"
函数arbuf2hex(缓冲区){
var hexCodes=[];
变量视图=新数据视图(缓冲区);
对于(变量i=0;i
关键是稍微更改MDN的sha256函数,以便它将十六进制字符串转换为ArrayBuffer,而不仅仅是使用字符串
如果您需要一个同步解决方案,您可以尝试使用它并使其适应您的需要。这要归功于Gabriel Hautclocq
sha256(hexstr) {
// We transform the string into an arraybuffer.
var buffer = new Uint8Array(hexstr.match(/[\da-f]{2}/gi).map(function (h) {
return parseInt(h, 16)
}))
// https://github.com/EOSIO/eosjs-ecc#examples
return ecc.sha256(buffer)
}
sha256("28349b1d4bcdc9905e4ef9719019e55743c84efa0c5e9a0b077f0b54fcd84905")
result : d533f24d6f28ddcef3f066474f7b8355383e485681ba8e793e037f5cf36e4883
这要归功于加布里埃尔·豪特科克
sha256(hexstr) {
// We transform the string into an arraybuffer.
var buffer = new Uint8Array(hexstr.match(/[\da-f]{2}/gi).map(function (h) {
return parseInt(h, 16)
}))
// https://github.com/EOSIO/eosjs-ecc#examples
return ecc.sha256(buffer)
}
sha256("28349b1d4bcdc9905e4ef9719019e55743c84efa0c5e9a0b077f0b54fcd84905")
result : d533f24d6f28ddcef3f066474f7b8355383e485681ba8e793e037f5cf36e4883
对于任何希望获得同步解决方案的人来说,这是我的出发点:
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
/* SHA-256 (FIPS 180-4) implementation in JavaScript (c) Chris Veness 2002-2017 */
/* MIT Licence */
/* www.movable-type.co.uk/scripts/sha256.html */
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
'use strict';
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
/* SHA-256 (FIPS 180-4) implementation in JavaScript (c) Chris Veness 2002-2017 */
/* MIT Licence */
/* www.movable-type.co.uk/scripts/sha256.html */
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
'use strict';
/**
* SHA-256 hash function reference implementation.
*
* This is an annotated direct implementation of FIPS 180-4, without any optimisations. It is
* intended to aid understanding of the algorithm rather than for production use.
*
* While it could be used where performance is not critical, I would recommend using the ‘Web
* Cryptography API’ (developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto/digest) for the browser,
* or the ‘crypto’ library (nodejs.org/api/crypto.html#crypto_class_hash) in Node.js.
*
* See csrc.nist.gov/groups/ST/toolkit/secure_hashing.html
* csrc.nist.gov/groups/ST/toolkit/examples.html
*/
class Sha256 {
/**
* Generates SHA-256 hash of string.
*
* @param {string} msg - (Unicode) string to be hashed.
* @param {Object} [options]
* @param {string} [options.msgFormat=string] - Message format: 'string' for JavaScript string
* (gets converted to UTF-8 for hashing); 'hex-bytes' for string of hex bytes ('616263' ≡ 'abc') .
* @param {string} [options.outFormat=hex] - Output format: 'hex' for string of contiguous
* hex bytes; 'hex-w' for grouping hex bytes into groups of (4 byte / 8 character) words.
* @returns {string} Hash of msg as hex character string.
*/
static hash(msg, options) {
const defaults = { msgFormat: 'string', outFormat: 'hex' };
const opt = Object.assign(defaults, options);
// note use throughout this routine of 'n >>> 0' to coerce Number 'n' to unsigned 32-bit integer
switch (opt.msgFormat) {
default: // default is to convert string to UTF-8, as SHA only deals with byte-streams
case 'string': msg = utf8Encode(msg); break;
case 'hex-bytes':msg = hexBytesToString(msg); break; // mostly for running tests
}
// constants [§4.2.2]
const K = [
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2 ];
// initial hash value [§5.3.3]
const H = [
0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19 ];
// PREPROCESSING [§6.2.1]
msg += String.fromCharCode(0x80); // add trailing '1' bit (+ 0's padding) to string [§5.1.1]
// convert string msg into 512-bit blocks (array of 16 32-bit integers) [§5.2.1]
const l = msg.length/4 + 2; // length (in 32-bit integers) of msg + ‘1’ + appended length
const N = Math.ceil(l/16); // number of 16-integer (512-bit) blocks required to hold 'l' ints
const M = new Array(N); // message M is N×16 array of 32-bit integers
for (let i=0; i<N; i++) {
M[i] = new Array(16);
for (let j=0; j<16; j++) { // encode 4 chars per integer (64 per block), big-endian encoding
M[i][j] = (msg.charCodeAt(i*64+j*4+0)<<24) | (msg.charCodeAt(i*64+j*4+1)<<16)
| (msg.charCodeAt(i*64+j*4+2)<< 8) | (msg.charCodeAt(i*64+j*4+3)<< 0);
} // note running off the end of msg is ok 'cos bitwise ops on NaN return 0
}
// add length (in bits) into final pair of 32-bit integers (big-endian) [§5.1.1]
// note: most significant word would be (len-1)*8 >>> 32, but since JS converts
// bitwise-op args to 32 bits, we need to simulate this by arithmetic operators
const lenHi = ((msg.length-1)*8) / Math.pow(2, 32);
const lenLo = ((msg.length-1)*8) >>> 0;
M[N-1][14] = Math.floor(lenHi);
M[N-1][15] = lenLo;
// HASH COMPUTATION [§6.2.2]
for (let i=0; i<N; i++) {
const W = new Array(64);
// 1 - prepare message schedule 'W'
for (let t=0; t<16; t++) W[t] = M[i][t];
for (let t=16; t<64; t++) {
W[t] = (Sha256.σ1(W[t-2]) + W[t-7] + Sha256.σ0(W[t-15]) + W[t-16]) >>> 0;
}
// 2 - initialise working variables a, b, c, d, e, f, g, h with previous hash value
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];
// 3 - main loop (note '>>> 0' for 'addition modulo 2^32')
for (let t=0; t<64; t++) {
const T1 = h + Sha256.Σ1(e) + Sha256.Ch(e, f, g) + K[t] + W[t];
const T2 = Sha256.Σ0(a) + Sha256.Maj(a, b, c);
h = g;
g = f;
f = e;
e = (d + T1) >>> 0;
d = c;
c = b;
b = a;
a = (T1 + T2) >>> 0;
}
// 4 - compute the new intermediate hash value (note '>>> 0' for 'addition modulo 2^32')
H[0] = (H[0]+a) >>> 0;
H[1] = (H[1]+b) >>> 0;
H[2] = (H[2]+c) >>> 0;
H[3] = (H[3]+d) >>> 0;
H[4] = (H[4]+e) >>> 0;
H[5] = (H[5]+f) >>> 0;
H[6] = (H[6]+g) >>> 0;
H[7] = (H[7]+h) >>> 0;
}
// convert H0..H7 to hex strings (with leading zeros)
for (let h=0; h<H.length; h++) H[h] = ('00000000'+H[h].toString(16)).slice(-8);
// concatenate H0..H7, with separator if required
const separator = opt.outFormat=='hex-w' ? ' ' : '';
return H.join(separator);
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
function utf8Encode(str) {
try {
return new TextEncoder().encode(str, 'utf-8').reduce((prev, curr) => prev + String.fromCharCode(curr), '');
} catch (e) { // no TextEncoder available?
return unescape(encodeURIComponent(str)); // monsur.hossa.in/2012/07/20/utf-8-in-javascript.html
}
}
function hexBytesToString(hexStr) { // convert string of hex numbers to a string of chars (eg '616263' -> 'abc').
const str = hexStr.replace(' ', ''); // allow space-separated groups
return str=='' ? '' : str.match(/.{2}/g).map(byte => String.fromCharCode(parseInt(byte, 16))).join('');
}
}
/**
* Rotates right (circular right shift) value x by n positions [§3.2.4].
* @private
*/
static ROTR(n, x) {
return (x >>> n) | (x << (32-n));
}
/**
* Logical functions [§4.1.2].
* @private
*/
static Σ0(x) { return Sha256.ROTR(2, x) ^ Sha256.ROTR(13, x) ^ Sha256.ROTR(22, x); }
static Σ1(x) { return Sha256.ROTR(6, x) ^ Sha256.ROTR(11, x) ^ Sha256.ROTR(25, x); }
static σ0(x) { return Sha256.ROTR(7, x) ^ Sha256.ROTR(18, x) ^ (x>>>3); }
static σ1(x) { return Sha256.ROTR(17, x) ^ Sha256.ROTR(19, x) ^ (x>>>10); }
static Ch(x, y, z) { return (x & y) ^ (~x & z); } // 'choice'
static Maj(x, y, z) { return (x & y) ^ (x & z) ^ (y & z); } // 'majority'
}
/*---------------------------------------------------------------------------------------------------*/
/*SHA-256(FIPS 180-4)在JavaScript中的实现(c)2002-2017*/
/*麻省理工学院执照*/
/*www.movable-type.co.uk/scripts/sha256.html*/
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
"严格使用",;
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
/*SHA-256(FIPS 180-4)在JavaScript中的实现(c)2002-2017*/
/*麻省理工学院执照*/
/*www.movable-type.co.uk/scripts/sha256.html*/
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
"严格使用",;
/**
*SHA-256哈希函数参考实现。
*
*这是FIPS 180-4的注释直接实现,没有任何优化。它是
*旨在帮助理解算法,而不是用于生产。
*
*虽然它可以在性能不重要的地方使用,但我建议使用“Web”
*浏览器的加密API”(developer.mozilla.org/en US/docs/Web/API/sublecrypto/digest),
*或者Node.js中的“crypto”库(nodejs.org/api/crypto.html#crypto_class_hash)。
*
*见csrc.nist.gov/groups/ST/toolkit/secure_hashing.html
*csrc.nist.gov/groups/ST/toolkit/examples.html
*/
Sha256类{
/**
*生成字符串的SHA-256哈希。
*
*@param{string}msg-(Unicode)要哈希的字符串。
*@param{Object}[选项]
*@param{string}[options.msgFormat=string]-消息格式:Jav的“string”