Question

我一直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。我尽可能地打破了事情。我写了一些javascript来生成一个密钥对，打印私有和公共值，加密一个简单的字符串并打印出来。

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中解码不会（也在javascript下面发布）。我似乎也无法找到在PHP中设置SHA-512声明的位置。有没有人有这种交流的经验，也许我指出了正确的方向。之所以选择RSA-OAEP，是因为它支持chrome，mozilla，IE11和Safari以及PHP。

亲切的问候，吉丁

＆＃13;

// 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;
	}

＆＃13;

<?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;
?>

＆＃13;

Answer 1

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暗示。用SHA-1替换SHA-512后，它终于奏效了。在PHP文档中，它表示crypt libe默认为SHA-1。事情应该与phpseclib一起正常工作，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。但至少我有一个工作的解决方案来工作...希望这有助于其他人在同一件事上工作。

吉丁

Answer 2

吉丁，

很高兴你找到了答案。您的问题不在于PHP，而在Safari中，至少在此时它不支持除SHA1以外的任何其他OAEP。

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。

我们将此作为测试套件来帮助我们构建https://github.com/PeculiarVentures/webcrypto-liner，这样可以更轻松地构建可互操作的WebCrypto应用程序。

RSA-OAEP SHA-512从Javascriptwebcrypt api加密/解密到PHP openssl？

2 个答案: