javascript - Can't verify signature witn Node.js Crypto, using key pairs

Question

I've a very small code in nodejs where I sign a string and then try to verify it, using node crypto and key pairs generated with openssl. No matter what I try, the result is always "false", the signature can't be verified.

Generation of public/private key pairs:

openssl genrsa -out rsa_1024_priv.pem 1024

openssl rsa -in rsa_1024_priv.pem -out rsa_1024_pub.pem -outform PEM -pubout

The resultant keys are (I don't care made them public BTW):

-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----

-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDCtTEic76GBqUetJ1XXrrWZcxd
8vJr2raWRqBjbGpSzLqa3YLvVxVeK49iSlI+5uLX/2WFJdhKAWoqO+03oH4TDSup
olzZrwMFSylxGwR5jPmoNHDMS3nnzUkBtdr3NCfq1C34fQV0iUGdlPtJaiiTBQPM
t4KUcQ1TaazB8TzhqwIDAQAB
-----END PUBLIC KEY-----

Then, this is my code for node:

var crypto = require('crypto');

var privateKey = '-----BEGIN RSA PRIVATE KEY-----
'+
'MIICXQIBAAKBgQDCtTEic76GBqUetJ1XXrrWZcxd8vJr2raWRqBjbGpSzLqa3YLv
'+
'VxVeK49iSlI+5uLX/2WFJdhKAWoqO+03oH4TDSupolzZrwMFSylxGwR5jPmoNHDM
'+
'S3nnzUkBtdr3NCfq1C34fQV0iUGdlPtJaiiTBQPMt4KUcQ1TaazB8TzhqwIDAQAB
'+
'AoGAM8WeBP0lwdluelWoKJ0lrPBwgOKilw8W0aqB5y3ir5WEYL1ZnW5YXivS+l2s
'+
'tNELrEdapSbE9hieNBCvKMViABQXj4DRw5Dgpfz6Hc8XIzoEl68DtxL313EyouZD
'+
'jOiOGWW5UTBatLh05Fa5rh0FbZn8GsHrA6nhz4Fg2zGzpyECQQDi8rN6qhjEk5If
'+
'+fOBT+kjHZ/SLrH6OIeAJ+RYstjOfS0bWiM9Wvrhtr7DZkIUA5JNsmeANUGlCrQ2
'+
'cBJU2cJJAkEA26HyehCmnCkCjit7s8g3MdT0ys5WvrAFO6z3+kCbCAsGS+34EgnF
'+
'yz8dDdfUYP410R5+9Cs/RkYesqindsvEUwJBALCmQVXFeKnqQ99n60ZIMSwILxKn
'+
'Dhm6Tp5Obssryt5PSQD1VGC5pHZ0jGAEBIMXlJWtvCprScFxZ3zIFzy8kyECQQDB
'+
'lUhHVo3DblIWRTVPDNW5Ul5AswW6JSM3qgkXxgHfYPg3zJOuMnbn4cUWAnnq06VT
'+
'oHF9fPDUW9GK3yRbjNaJAkAB2Al6yY0KUhYLtWoEpQ40HlATbhNel2cn5WNs6Y5F
'+
'2hedvWdhS/zLzbtbSlOegp00d2/7IBghAfjAc3DE9DZw
'+
'-----END RSA PRIVATE KEY-----';

var publicKey = '-----BEGIN PUBLIC KEY-----
'+
'MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDCtTEic76GBqUetJ1XXrrWZcxd
'+
'8vJr2raWRqBjbGpSzLqa3YLvVxVeK49iSlI+5uLX/2WFJdhKAWoqO+03oH4TDSup
'+
'olzZrwMFSylxGwR5jPmoNHDMS3nnzUkBtdr3NCfq1C34fQV0iUGdlPtJaiiTBQPM
'+
't4KUcQ1TaazB8TzhqwIDAQAB
'+
'-----END PUBLIC KEY-----';

var signer = crypto.createSign('sha256');
signer.update('hola');
var sign = signer.sign(privateKey,'base64');

var verifier = crypto.createVerify('sha256');
verifier.update(sign);
var ver = verifier.verify(publicKey, sign,'base64');
console.log(ver);//<--- always false!

I've tried to use different algorithms and encoding. I've read the PEM files with "fs", no luck also. What am I missing? BTW, those keys works perfectly using npm URSA module, so I know the keys are ok (can't use ursa in my project). Thanks!

Answer 1

You need to verify the same data you signed: verifier.update(sign); should be verifier.update('hola');