我使用以下示例在Node.js中进行签名+验证:https://github.com/nodejs/node-v0.x-archive/issues/6904。验证在Node.js中成功,但在WebCrypto中失败。同样,使用WebCrypto签名的消息无法在Node.js中进行验证。
这是我用来验证使用WebCrypto - https://jsfiddle.net/aj49e8sj/从Node.js脚本生成的签名的代码。已在Chrome 54.0.2840.27和Firefox 48.0.2中进行了测试
// From https://github.com/nodejs/node-v0.x-archive/issues/6904
var keys = {
priv: '-----BEGIN EC PRIVATE KEY-----\n' +
'MHcCAQEEIF+jnWY1D5kbVYDNvxxo/Y+ku2uJPDwS0r/VuPZQrjjVoAoGCCqGSM49\n' +
'AwEHoUQDQgAEurOxfSxmqIRYzJVagdZfMMSjRNNhB8i3mXyIMq704m2m52FdfKZ2\n' +
'pQhByd5eyj3lgZ7m7jbchtdgyOF8Io/1ng==\n' +
'-----END EC PRIVATE KEY-----\n',
pub: '-----BEGIN PUBLIC KEY-----\n' +
'MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEurOxfSxmqIRYzJVagdZfMMSjRNNh\n' +
'B8i3mXyIMq704m2m52FdfKZ2pQhByd5eyj3lgZ7m7jbchtdgyOF8Io/1ng==\n' +
'-----END PUBLIC KEY-----\n'
};
var message = (new TextEncoder('UTF-8')).encode('hello');
// Algorithm used in Node.js script is ecdsa-with-SHA1, key generated with prime256v1
var algorithm = {
name: 'ECDSA',
namedCurve: 'P-256',
hash: {
name: 'SHA-1'
}
};
// Signature from obtained via above Node.js script
var sig64 = 'MEUCIQDkAtiomagyHFi7dNfxMrzx/U0Gk/ZhmwCqaL3TimvlswIgPgeDqgZNqfR5/FZZASYsczUAhGSXjuycLhWnvk20qKc=';
// Decode base64 string into ArrayBuffer
var b64Decode = (str) => Uint8Array.from(atob(str), x => x.charCodeAt(0));
// Get base64 string from public key
const key64 = keys.pub.split('\n')
.filter(x => x.length > 0 && !x.startsWith('-----'))
.join('');
// Convert to buffers
var sig = b64Decode(sig64);
var keySpki = b64Decode(key64);
// Import and verify
// Want 'Verification result: true' but will get 'false'
var importKey = crypto.subtle.importKey('spki', keySpki, algorithm, true, ['verify'])
.then(key => crypto.subtle.verify(algorithm, key, sig, message))
.then(result => console.log('Verification result: ' + result));
使用SHA-256而不是SHA-1的类似问题的相关问题:Generating ECDSA signature with Node.js/crypto
我检查过的事情:
如何成功验证从Node.js收到的签名,反之亦然 - 验证从WebCrypto生成的Node.js中的签名?或者标准的实现是否以某种方式略有不同,使它们不兼容?
编辑:
已验证的Node.js签名是DER编码的,而WebCrypto签名则不是。
答案 0 :(得分:3)
没有使用这些库中的任何一个我无法肯定地说,但有一种可能性是它们不会使用相同的编码类型进行签名。对于DSA / ECDSA,有两种主要格式,IEEE P1363(由Windows使用)和DER(由OpenSSL使用)。
" Windows"格式是具有预设大小(由Q表示DSA和P表示ECDSA(Windows不支持Char-2,但如果它确实如此,则可能是M表示Char-2 ECDSA))。然后,r
和s
都会用0
进行左边填充,直到达到该长度。
在r = 0x305
和s = 0x810522
的小于合法的例子中,sizeof(Q)为3个字节:
// r
000305
// s
810522
对于" OpenSSL"格式它根据DER的规则编码为SEQUENCE(INTEGER(r),INTEGER(s)),看起来像
// SEQUENCE
30
// (length of payload)
0A
// INTEGER(r)
02
// (length of payload)
02
// note the leading 0x00 is omitted
0305
// INTEGER(s)
02
// (length of payload)
04
// Since INTEGER is a signed type, but this represented a positive number,
// a 0x00 has to be inserted to keep the sign bit clear.
00810522
或紧凑地:
000305810522
300A02020305020400810522
" Windows"格式始终是偶数,总长度相同。 " OpenSSL"格式通常大约6个字节,但在中间可以获得或丢失一个字节;所以它有时甚至是奇怪的。
Base64解码您的sig64
值表明它正在使用DER编码。使用WebCrypto生成几个签名;如果没有以0x30
开头,那么您就会遇到IEEE / DER问题。
答案 1 :(得分:1)
几个小时后终于找到零依赖的解决方案!
在浏览器中:
// Tip: Copy & Paste in the console for test.
// Text to sign:
var source = 'test';
// Auxs
function length(hex) {
return ('00' + (hex.length / 2).toString(16)).slice(-2).toString();
}
function pubKeyToPEM(key) {
var pem = '-----BEGIN PUBLIC KEY-----\n',
keydata = '',
bytes = new Uint8Array( key );
for (var i = 0; i < bytes.byteLength; i++) {
keydata += String.fromCharCode( bytes[ i ] );
}
keydata = window.btoa(keydata);
while(keydata.length > 0) {
pem += keydata.substring(0, 64) + '\n';
keydata = keydata.substring(64);
}
pem = pem + "-----END PUBLIC KEY-----";
return pem;
}
// Generate new keypair.
window.crypto.subtle.generateKey({ name: "ECDSA", namedCurve: "P-384" }, true, ["sign", "verify"])
.then(function(keypair) {
// Encode as UTF-8
var enc = new TextEncoder('UTF-8'),
digest = enc.encode(source);
// Sign with subtle
window.crypto.subtle.sign({ name: "ECDSA", hash: {name: "SHA-1"} }, keypair.privateKey, digest)
.then(function(signature) {
signature = new Uint8Array(signature);
// Extract r & s and format it in ASN1 format.
var signHex = Array.prototype.map.call(signature, function(x) { return ('00' + x.toString(16)).slice(-2); }).join(''),
r = signHex.substring(0, 96),
s = signHex.substring(96),
rPre = true,
sPre = true;
while(r.indexOf('00') === 0) {
r = r.substring(2);
rPre = false;
}
if (rPre && parseInt(r.substring(0, 2), 16) > 127) {
r = '00' + r;
}
while(s.indexOf('00') === 0) {
s = s.substring(2);
sPre = false;
}
if(sPre && parseInt(s.substring(0, 2), 16) > 127) {
s = '00' + s;
}
var payload = '02' + length(r) + r +
'02' + length(s) + s,
der = '30' + length(payload) + payload;
// Export public key un PEM format (needed by node)
window.crypto.subtle.exportKey('spki', keypair.publicKey)
.then(function(key) {
var pubKey = pubKeyToPEM(key);
console.log('This is pubKey -> ', pubKey);
console.log('This is signature -> ', der);
});
// For test, we verify the signature, nothing, anecdotal.
window.crypto.subtle.verify({ name: "ECDSA", hash: {name: "SHA-1"} }, keypair.publicKey, signature, digest)
.then(console.log);
});
});
在节点中:
const crypto = require('crypto');
// ----------------------------------------------------------------------------
// Paste from browser!
var puKeyPem = '-----BEGIN PUBLIC KEY-----\n' +
'MHYwEAYHKoZIzj0CAQYFK4EEACIDYgAEmDubwJuORpMMoMnvv59W8tU8PxPChh75\n' +
'vjlfVB2+tPY5KDy1I0ohz2US+2K1T/ROcDCSRAjyONRzzwVBm9S6bqbk3KuaT2KG\n' +
'ikoe0KLfTeQtdEUyq8J0aEOKRXoCJLZq\n' +
'-----END PUBLIC KEY-----';
var hexSign = '306402305df22aa5f4e7200b7c264c891cd3a8c5b4622c25872020832d5bb3d251773592020249a46a8349754dc58c47c4cbb7c9023053b929a98f5c8cccf2c1a4746d82fc751e044b1f76dffdf9ef73f73bee1499c5e20aadddda41e3373760b8b0f3c1bbb2';
// ----------------------------------------------------------------------------
var verifier = crypto.createVerify('sha1'),
digest = 'test';
verifier.update(digest);
verifier.end();
console.log(verifier.verify(puKeyPem, hexSign, 'hex'));
// ----------------------------------------------------------------------------
答案 2 :(得分:0)
现在,您无需修改即可生成兼容的(nodejs与webcrypto)密钥和签名。以下示例适用于RSA,但ECDSA应该非常相似-本质在于类型/格式/编码。
生成密钥对(nodejs):
const { publicKey, privateKey } = crypto.generateKeyPairSync('rsa', {
modulusLength: 2048,
publicKeyEncoding: {
type: 'spki',
format: 'der'
},
privateKeyEncoding: {
type: 'pkcs8',
format: 'der'
}
});
console.log('PRIVATE', Buffer.from(privateKey).toString('base64'));
console.log('PUBLIC', Buffer.from(publicKey).toString('base64'));
签名消息(nodejs):
const signature = crypto.sign(
'sha256',
Buffer.from('The quick brown fox jumps over the lazy dog', 'utf8'),
{
key: crypto.createPrivateKey({
key: Buffer.from('...base64 encoded private key', 'base64'),
format: 'der',
type: 'pkcs8'
}),
padding: crypto.constants.RSA_PKCS1_PADDING,
dsaEncoding: 'ieee-p1363'
}
);
console.log('SIGNATURE', signature.toString('base64'));
验证消息(webcrypto)-您必须更改普通js中的Buffer函数:
(async () => console.log(await crypto.subtle.verify(
{ name: 'RSASSA-PKCS1-v1_5' },
await crypto.subtle.importKey(
'spki',
Buffer.from('...base64 encoded public key', 'base64'),
{ name: 'RSASSA-PKCS1-v1_5', hash: {name: 'SHA-256'} },
false,
[ 'verify' ]
),
Buffer.from('...base64 encoded signature', 'base64'),
Buffer.from('The quick brown fox jumps over the lazy dog', 'utf8')
)))();