signing data with private key generated by new openssh 8.0 not working.

[dartedfa]

Trying to sign some data with private key which is generated by new openssh 8.0, signature output is always random, Output is always different, when passing same data. I have checked and think that problem comes from var "crt" func related to browserify-rsa. for older keys it works as expected, problem occurs only in case of using new private key. Can someone help me with this ? Thanks in advance.

[gustavosbarreto]

Trying to sign some data with private key which is generated by new openssh 8.0, signature output is always random, Output is always different, when passing same data. I have checked and think that problem comes from var "crt" func related to browserify-rsa. for older keys it works as expected, problem occurs only in case of using new private key. Can someone help me with this ? Thanks in advance.

The same here.

Test code:

var keyPriv = `-----BEGIN OPENSSH PRIVATE KEY-----
b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAlwAAAAdzc2gtcn
NhAAAAAwEAAQAAAIEAvzqy5E3zSn2TG3QRvOmXyfU7UAJDBLEQ9/ocKTFLGPKbF506xGfK
fbksNFg/rbMvVbTSNlouQTTdu7jNiQBwBaHvuJz/PwvY5iz7mVoNue/7g+Ndn09TVWM+yi
sQtNUbpX6UqPV0pLp9er5QG1V6YsJouh5A3nFWR0LJ+HQmj8UAAAIQ3RIN190SDdcAAAAH
c3NoLXJzYQAAAIEAvzqy5E3zSn2TG3QRvOmXyfU7UAJDBLEQ9/ocKTFLGPKbF506xGfKfb
ksNFg/rbMvVbTSNlouQTTdu7jNiQBwBaHvuJz/PwvY5iz7mVoNue/7g+Ndn09TVWM+yisQ
tNUbpX6UqPV0pLp9er5QG1V6YsJouh5A3nFWR0LJ+HQmj8UAAAADAQABAAAAgFSAe8ynJX
slQnw/LhdsocZ8t1kDptnL5NOvkgIh5i2AB0jIEc/4jWJBEWeQF5OKOsCExt99ujLWSaVK
ZIjFyLnwmPL6tN6Zm/yTiWZxs5VE6S4eRW6V2TXqx6FvFsMn5w0zol8E/HDtoEwtC4tSZo
g3cTwdj5QEwgomIYNoITwBAAAAQDHxgSxkJuuciPYULz65l53ABEOGL4cQzSwx6yZ1jxhY
87W2Si0c2+ZWhtw6P5vfiQ5BsG1UArWVCaS+2FRgEhoAAABBAOovulyHjVohZtpwJurCMK
sByIkQFy97Td297PLkjW0cb4s3xoXDcSbLId41iCbUsuvffMWIElcZOMWVFlmVfQkAAABB
ANEKo9dzywZX+Rp7qMomaxGBoCGOMiw4qvydU4rXIXpLHfQS48kewy/5HsS9Au9ookctan
m28dPkGkwqnZAzZ90AAAAUZ3VzdGF2b0BkcmVyYS1tb2JpbGUBAgMEBQYH
-----END OPENSSH PRIVATE KEY-----`
var key = sshpk.parsePrivateKey(keyPriv);

var data = 'some data';

/* Sign some data with the key */
var s = key.createSign('sha1');
s.update(data);
var signature = s.sign();

console.log(signature.toBuffer().toString('base64'));

/* Now load the public key (could also use just key.toPublic()) */
var keyPub = `ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAAAgQC/OrLkTfNKfZMbdBG86ZfJ9TtQAkMEsRD3+hwpMUsY8psXnTrEZ8p9uSw0WD+tsy9VtNI2Wi5BNN27uM2JAHAFoe+4nP8/C9jmLPuZWg257/uD412fT1NVYz7KKxC01RulfpSo9XSkun16vlAbVXpiwmi6HkDecVZHQsn4dCaPxQ== gustavo@drera-mobile`;

key = sshpk.parseKey(keyPub);

/* Make a crypto.Verifier with this key */
var v = key.createVerify('sha1');
v.update(data);
var valid = v.verify(signature);
console.log(valid);

The signature output is always random

[gustavosbarreto]

@dartedfa Did you found solution for this?

[gustavosbarreto]

Maybe someone could implement support for OpenSSH key format based on this:
https://github.com/rzcoder/node-rsa/pull/181/files