原生js实现rsa加密

原生js实现rsa加密

示例

createNewUserKey().then(function(keyPairs) {
    encrypt("this is origin text", keyPairs[0]).then(function(res) {
        console.log('public', JSON.stringify(keyPairs[0]));
        console.log('private', JSON.stringify(keyPairs[1]));
        decrypt(res, keyPairs[1]).then(function(decrypted) {
            console.log('decrypted', decrypted);
        });
    });
});

源码

function encrypt(data,keyJSON){var data=new TextEncoder("UTF-8").encode(data);var randomsKeys=geneRandomHexStr(64);var encryptedKey=hexStringToUint8Array(randomsKeys);var aesAlgo={name:'aes-cbc',iv:hexStringToUint8Array("000102030405060708090a0b0c0d0e0f")};return crypto.subtle.importKey("jwk",keyJSON,{name:"rsa-oaep",hash:{name:"sha-256"}},true,['encrypt']).then(function(publicKey){return crypto.subtle.encrypt({name:"rsa-oaep"},publicKey,encryptedKey)}).then(function(res){encryptedKey=bytesToHexString(res);return crypto.subtle.importKey('raw',hexStringToUint8Array(randomsKeys),aesAlgo,false,['encrypt','decrypt'])}).then(function(result){return crypto.subtle.encrypt(aesAlgo,result,data)}).then(function(encryptedData){return Promise.resolve({'encrypted':bytesToHexString(encryptedData),'encryptedKey':encryptedKey,})})}function decrypt(data,keyJSON){var encryptedKey=new hexStringToUint8Array(data.encryptedKey);var encryptedData=new hexStringToUint8Array(data.encrypted);var aesAlgo={name:'aes-cbc',iv:hexStringToUint8Array("000102030405060708090a0b0c0d0e0f")};return crypto.subtle.importKey('jwk',keyJSON,{name:"rsa-oaep",hash:{name:"sha-256"}},true,['decrypt']).then(function(privateKey){return crypto.subtle.decrypt({name:'rsa-oaep'},privateKey,encryptedKey)}).then(function(decryptedKey){return crypto.subtle.importKey('raw',decryptedKey,aesAlgo,false,['encrypt','decrypt'])}).catch(function(){console.error("decrypt error")}).then(function(result){return crypto.subtle.decrypt(aesAlgo,result,encryptedData)}).then(function(data){return Promise.resolve(new TextDecoder("UTF-8").decode(new Uint8Array(data)))})}function createNewUserKey(){var algorithmKeyGen={name:"RSA-OAEP",hash:{name:"sha-256"},modulusLength:2048,publicExponent:new Uint8Array([0x01,0x00,0x01]),};var nonExtractable=false;var publicKey="";var privateKey="";var keyPairs="";return crypto.subtle.generateKey(algorithmKeyGen,true,['encrypt','decrypt']).then(function(result){keyPairs=result;return Promise.all([crypto.subtle.exportKey("jwk",keyPairs.publicKey),crypto.subtle.exportKey("jwk",keyPairs.privateKey)])})}function _arrayBufferToBase64(buffer){var binary='';var bytes=new Uint8Array(buffer);var len=bytes.byteLength;for(var i=0;i<len;i++){binary+=String.fromCharCode(bytes[i])}return window.btoa(binary)}function hexStringToUint8Array(hexString){if(hexString.length%2!=0)throw"Invalid hexString";var arrayBuffer=new Uint8Array(hexString.length/2);for(var i=0;i<hexString.length;i+=2){var byteValue=parseInt(hexString.substr(i,2),16);if(byteValue==NaN)throw"Invalid hexString";arrayBuffer[i/2]=byteValue}return arrayBuffer}function bytesToHexString(bytes){if(!bytes)return null;bytes=new Uint8Array(bytes);var hexBytes=[];for(var i=0;i<bytes.length;++i){var byteString=bytes[i].toString(16);if(byteString.length<2)byteString="0"+byteString;hexBytes.push(byteString)}return hexBytes.join("")}function geneRandomHexStr(length){var text="";var possible="0123456789abcdef";for(var i=0;i<length;i++)text+=possible.charAt(Math.floor(Math.random()*possible.length));return text}