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我一直在忙于尝试在浏览器客户端之间建立安全交换，使用 webcrypto api 和使用 openssl 的 PHP 服务器。我已经尽可能多地分解了。我写了一些 javascript 来生成一个密钥对，打印出私有和公共的值，加密一个简单的字符串并将其打印出来。

我已将这些值直接复制到一个简单的 php 脚本中。尝试使用 javascipt 中的值对其进行解码。

编码和解码在 javascript 中正常工作（如下所示），在 php 中解码不能（也在 javascript 下发布）。我似乎也找不到在 PHP 中设置 SHA-512 声明的位置。有没有人有过这种交流的经验，也许能给我指明正确的方向。选择 RSA-OAEP 是因为它受到 chrome、mozilla、IE11 和 Safari 以及 PHP 的支持。

亲切的问候，吉迪恩

// JavaScript Document
var keyPair;
var pemPublicKey;
var pemPrivateKey;

var _spki;
var _pkcs8;

	window.crypto.subtle.generateKey({
		name: "RSA-OAEP",
		modulusLength: 2048,
		publicExponent: new Uint8Array([1, 0, 1]),  // 24 bit representation of 65537
		hash: {name: "SHA-512"}
	}, true, ["encrypt", "decrypt"])
	.then(function(newKeyPair) {
		keyPair = newKeyPair;
		return keyPair;
	})
	.then(function(keyPair) {
		window.crypto.subtle.exportKey('spki', keyPair.publicKey)
		.then(function(spki) {
			_spki = spki;
			var pemPublicKey = convertBinaryToPem(spki, "PUBLIC KEY");
			document.writeln(pemPublicKey);
			sendToPhp();
		});
	
		window.crypto.subtle.exportKey('pkcs8', keyPair.privateKey)
		.then(function(pkcs8) {
			_pkcs8 = pkcs8;
			var pemPrivateKey = convertBinaryToPem(pkcs8, "PRIVATE KEY");
			document.writeln(pemPrivateKey);
		})
	});
	
	function sendToPhp() {
		window.crypto.subtle.importKey('spki', _spki, {name:"RSA-OAEP", hash: {name: "SHA-512"}}, false, ["encrypt"])
		.then(function(cryptokey) {
			window.crypto.subtle.encrypt({ name: "RSA-OAEP"}, cryptokey, str2ab('mijn geheimpje') )
			.then(function(encrypted){
				//returns an ArrayBuffer containing the encrypted data
				document.writeln(arrayBufferToBase64String(encrypted));
				receivedFromPhp(arrayBufferToBase64String(encrypted));
			});
		});
	}
	
	function receivedFromPhp(encrypted) {
		window.crypto.subtle.importKey('pkcs8', _pkcs8, {name:"RSA-OAEP", hash: {name: "SHA-512"}}, false, ["decrypt"])
		.then(function(cryptokey) {
			window.crypto.subtle.decrypt({ name: "RSA-OAEP"}, cryptokey, base64StringToArrayBuffer(encrypted) )
			.then(function(decrypted){
				//returns an ArrayBuffer containing the encrypted data
				var decryp = ab2str(decrypted);
				debugger;
			});
		});
	}
	
	function ab2str(buf) {
		return String.fromCharCode.apply(null, new Uint16Array(buf));
	}

	function str2ab(str) {
		var buf = new ArrayBuffer(str.length*2); // 2 bytes for each char
		var bufView = new Uint16Array(buf);
		for (var i=0, strLen=str.length; i<strLen; i++) {
			bufView[i] = str.charCodeAt(i);
		}
		return buf;
	}
	function base64StringToArrayBuffer(base64) {
		var binary_string =  atob(base64);
		var len = binary_string.length;
		var bytes = new Uint8Array( len );
		for (var i = 0; i < len; i++)        {
			bytes[i] = binary_string.charCodeAt(i);
		}
		return bytes.buffer;
	}
	function arrayBufferToBase64String(arrayBuffer) {
		var byteArray = new Uint8Array(arrayBuffer)
		var byteString = '';
		for (var i=0; i<byteArray.byteLength; i++) {
			byteString += String.fromCharCode(byteArray[i]);
		}
		return btoa(byteString);
	}

	function convertBinaryToPem(binaryData, label) {
		var base64Cert = arrayBufferToBase64String(binaryData);

		var pemCert = "-----BEGIN " + label + "-----\r\n";

		var nextIndex = 0;
		var lineLength;
		while (nextIndex < base64Cert.length) {
			if (nextIndex + 64 <= base64Cert.length) {
				pemCert += base64Cert.substr(nextIndex, 64) + "\r\n";
			} else {
				pemCert += base64Cert.substr(nextIndex) + "\r\n";
			}
			nextIndex += 64;
		}

		pemCert += "-----END " + label + "-----\r\n";
		return pemCert;
	}

<?php

	error_reporting(E_ALL);
	ini_set("display_errors", 1);
	$pemPublicKey = 	'-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvzJ07T/SiZsUPfC4ymwj
G/TqVdO04QZRUMcsmHeUG0BawSxlwoz+0YD48UZFYyTetw3egoasQfkvOPIUKuqq
mPEXwGsVlLbkqvPsgNA2K6Zye8El9DEp83eoPqylopU0L9zSnQp9VaNpSgsOlltr
0RRyq3q8gBJb7PkzuDzmXrr5KEuGmkLmOE3TH0Ck9u+c4xE87g3s5HtQ6uGa6jB6
JooTN1edPum+kBJdJajOW5FvOfDnEHQBsKZPd4HiYcOlM7crt2Y9XnBSBIIZ1uR6
a4Qs+EP6CwczPA6/J5a+GOV9ch1xZLsW5JuO55lCDpwrvKr7VVqwQG3qNewk8vVA
iwIDAQAB
-----END PUBLIC KEY-----';

	$pemPrivateKey =	'-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----';

	$encrMessage =	'd14QunL/M8XwYvsogvjkExe24LP1aYY51OM3ACyl3xJam5DnhwBB4o+cf6/tRaBp+AzoZYQuemd7IP3NjYYEHj23DPaxDzoPNfHoWxNfKC9xqcgoLDywEjJvwtvNaJDAO+mGfNHfsi4TFtsSFRvJ8rkxNOYhoprD2XMIEeklSpFHC3V9hnadHunP+Vgwc5TNRCRPZ1AEcEiSlNmBkvd8pB+iMyAwA7P2tmamrpNQYbEjoQu0mCNPUVrft1QI1IS4XWAL4+HP2vBWV41AttL8XjFxicrR3mXXZVukwiu7PJFPjwW9cLGEgTMkcpBkPZoTGPefiCQYVh4LEq6fYb4kdw==';

    //just for testing if it works with the public/private keys supplied by javascript, which it does
	//$publicKey = openssl_pkey_get_public($pemPublicKey);
	//openssl_public_encrypt('mijn geheimpje',$encr,$publicKey,OPENSSL_PKCS1_OAEP_PADDING); 
	//$encr64 = base64_encode($encr);	
	
	$privateKey = openssl_get_privatekey($pemPrivateKey);
	if (!$privateKey) {
		echo "Cannot get private key";
	}
	
	$encr = base64_decode($encrMessage);
	
	$b = openssl_private_decrypt($encr,$decr,$privateKey,OPENSSL_PKCS1_OAEP_PADDING);
	if (!$b) {
		echo "Cannot decode message";
	}
	echo "String decrypt :". $decr;
?>

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2 回答 2

2

猜猜我解决了自己的问题。我玩弄了 phpseclib 并得到了关于哈希错误的提示。在用 SHA-1 替换 SHA-512 后，它终于起作用了。在 PHP 文档中，它说 crypt libe 默认为 SHA-1。phpseclib 应该可以正常工作，完全独立于 open_ssl php lib。但它没有。仍然不知道为什么会发生这种情况。但至少我有一个可行的解决方案……希望这有助于其他人从事同样的工作。

基甸

于 2015-04-16T10:53:54.040 回答
0

基甸，

很高兴你找到了答案。您的问题不在于 PHP，而在于 Safari，它不支持 SHA1 以外的任何 OAEP，至少目前是这样。

如果您打算使用 WebCrypto，您可能需要查看：https ://peculiarventures.github.io/pv-webcrypto-tests/ ，它列举了每个浏览器支持的组合。

我们将其作为一个测试套件来帮助我们构建https://github.com/PeculiarVentures/webcrypto-liner这使得构建可互操作的 WebCrypto 应用程序变得更加容易。

于 2016-12-09T07:33:46.963 回答