js中的web加密
window.crypto.subtle只会在安全模式下有用，也就是https环境下
创建摘要（硬解）
var i = new TextEncoder(‘utf-8‘).encode("Hello World!");crypto.subtle.digest(‘SHA-256‘, i).then(function(digest) { ???var view = new DataView(digest); ???var str = ‘‘; ???for(var i = 0; i < view.byteLength; i++) { ???????var b = view.getUint8(i); ???????str += ‘0123456789abcdef‘[(b & 0xf0) >> 4]; ???????str += ‘0123456789abcdef‘[(b & 0x0f)]; ???} ???console.log(str); // 7f83b1657ff1fc53b92dc18148a1d65dfc2d4b1fa3d677284addd200126d9069 ???var arr = new Uint8Array(digest); ???console.log(arr);}).catch(function(err) { ???console.log(err);})创建摘要（软解）
const text = ‘Hello World!‘;const encoder = new TextEncoder();const data = encoder.encode(text);window.crypto.subtle.digest(‘SHA-256‘, data).then(digestValue => { ???const byteArray = new Uint8Array(digestValue); ???const hexCodes = [...byteArray].map(value => { ???????const hexCode = value.toString(16); ???????const paddedHexCode = hexCode.padStart(2, ‘0‘); ???????return paddedHexCode; ???}); ???console.log(hexCodes.join(‘‘));});加密随机数
var arr = new Uint8Array(5);crypto.getRandomValues(arr);创建PEM格式的RSA-OAEP私钥
function arrayBufferToBase64(arrayBuffer) { ???var byteArray = new Uint8Array(arrayBuffer); ???var byteString = ""; ???for(var i = 0; i < byteArray.byteLength; i++) { ???????byteString += String.fromCharCode(byteArray[i]); ???} ???var b64 = window.btoa(byteString); ???return b64}function addNewLines(str) { ???var finalString = ‘‘; ???while(str.length > 0) { ???????finalString += str.substring(0, 64) + ‘\n‘; ???????str = str.substring(64); ???} ???return finalString;}function toPem(privateKey) { ???var b64 = addNewLines(arrayBufferToBase64(privateKey)); ???var pem = "-----BEGIN PRIVATE KEY-----\n" + b64 + "-----END PRIVATE KEY-----" ???return pem;}window.crypto.subtle.generateKey( ???{ ???????name: "RSA-OAEP", ???????modulusLength: 2048, ???????publicExponent: new Uint8Array([0x01, 0x00, 0x01]), ???????hash: {name: "SHA-256"} ???}, ???true, ???["encrypt", "decrypt"]).then(function(keyPair){ ???window.crypto.subtle.exportKey("pkcs8", keyPair.privateKey).then(function(exportedPrivateKey){ ???????var pem = toPem(exportedPrivateKey); ???????console.log(pem); ???}).catch(function(err){ ???????console.log(err); ???})})运行上面代码 ???-----BEGIN PRIVATE KEY----- ???MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQDVh3Q1faf2SSsF ???M8yVqSCTgSSdEpbRepE2mzG03mq2CUpu+yGJo2U+JyqVJVorcFRBcu5fLNtXrizp ???cMu5AsYSJ60HXi4us3UlIIDJm+lLVCYzD3C8bttGUglbTDo3JY1xrQ+1SVCjop33 ???NSBgmSl48q0zLKz9r9g7hk+cRPQ5xiDn9pP7N3tIC+dVJg+wlT79XJ4bkHQo/wA7 ???aNKb27MJ0pKKZXDl2iDjKxryVATunzBHbmoQ0je3iQwS2Eup9UHH/STO0Gzn81jr ???0fpqtZsRSfpzBwgqKgckDQkW5TB9Bn9mhM/lnYU3PBlnea3ohLaxGc+RQy2IC4oA ???3dCnHOjFAgMBAAECggEAZG6umQ4+NxgZFPxVKLuA6AAhIYQBzguRS5bZXVIT7QUX ???rnWOQ7fHweEYJUiJTc8qwhH1zmxBys7Qrwfvulh0o0toFgQVQsADxG+yQ6GCrHyq ???7u8/PlIB7uRdJEUJSLDwA1y7+6+9LwootIKXdPf1Sr8R+fT0dOoFkZHN1hmUqasL ???ch95JLkCJZ8ELZU2IJ5H8R4qDDRiUI1/zaGAFO1DCbGNRWpqTs/MVMTp7wMh3oN0 ???ZYFGgmibWv8WALxpsSX+mT9JkPHn7ljlXNVWfi+J1qy8h6YcQW4nArcDPpomPIpN ???9y3UfsHOHSE39d5AGEWhw2syk+PxSaKnqbW6nrGeDQKBgQD8RIPt9x5n/hnJpCaE ???5o46qUrlYkIJk49t73Bqhr2k1StbaUFu9qF9G+PP/hsJRPJEWXyKvVfb6BNZsgbP ???gPMbBmsXwnobd+XWqChx6HJE09obF1GSQjXov/t4nFzdNxTrXzhMjbyTw4N72CyX ???1+QFZAn9GRXiben9W05XmSa5wwKBgQDYsDaVvJdR5yYU6pkcgDnr7NZ9RAMPraVz ???dZvbzvIwZcOE1tBhCFODbQsPObWkLFFinaWiAUZOIIur858UJxWSCZVqgHg6bk9n ???F7+Hw+4T/VnrurqNY1H4IY/5bFPqArXrat5b49CGfj/C2Se/WUG5p8bt/cY4HLbg ???0HgGd7ki1wKBgQDEDKtLIKXsw7lez8dvuY4HYNHn+ri/oIHzOgXvg8+WbmRHokFL ???7zgJdsdROXXhekedfr4fRI8nQ/Dl4EkSsnA8LHzF9knXVxK0A/OKss87VjlGnJS0 ???SeiDfc/9J+ezs776PQIP3IcVfviMIrBlQU7gMaLho8EyO6GBWJhF06wY6QKBgChv ???yd/rj7mDD0I7/VKqQyTZz7UUqhWU7Bk9y1YbqmqJsxDpHX3eFeeiw7uVo2X9tzpV ???/QDciAgwXqA6GGekW4wjKbT0QHt29m5gqidl0tn8H3m0IPgdnsBVUw7Svl4fH1/N ???U62GN/XBPZjY+Wfl+jPxMVhcUU9LXH1bqepbETuFAoGAQiHF8bPTSqPcCQ0AvQzG ???h5RK/K1LkoATXkxgJY+Te7jws6Ru/U6mFD7KDeUw3GeuSiMYZY/9eUnOq0WKfNg4 ???fg4S7vqYvzyISdMj77CyHhQPcnZ6KqtdBS2D3NPqf/aG9OjfftRDXe0kZP0v0YNF ???DU2EjlbkOZPIVrZZ0THSUIo= ???-----END PRIVATE KEY-----使用上面创建的私钥
var pkey = `-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----`function removeLines(str) { ???return str.replace("\n", "");}function base64ToArrayBuffer(b64) { ???var byteString = window.atob(b64); ???var byteArray = new Uint8Array(byteString.length); ???for(var i = 0; i < byteString.length; i++) { ???????byteArray[i] = byteString.charCodeAt(i); ???} ???return byteArray;}function pemToArrayBuffer(pem) { ???var b64Lines = removeLines(pem); ???var b64Prefix = b64Lines.replace("-----BEGIN PRIVATE KEY-----", ‘‘); ???console.log(b64Prefix) ???var b64Final = b64Prefix.replace("-----END PRIVATE KEY-----", ‘‘); ???return base64ToArrayBuffer(b64Final);}window.crypto.subtle.importKey( ???"pkcs8", ????pemToArrayBuffer(pkey), ????{name: "RSA-OAEP", hash: {name: "SHA-256"}}, ???true, ???[‘decrypt‘]).then(function(importedPrivateKey){ ???console.log(importedPrivateKey);}).catch(function(err){ ???console.log(err);})
js中的web加密
原文地址：https://www.cnblogs.com/ye-hcj/p/10354164.html