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indutny / elliptic

Fast Elliptic Curve Cryptography in plain javascript
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keyFromPrivate(privateKey).getPublic('hex') isn't returning the same public key as what I'm being shown by genKeyPair() #276

Open joelwright-dev opened 2 years ago

joelwright-dev commented 2 years ago

Hello all,

I'm writing a basic program to get the public key from a private key using this code:

return ec.keyFromPrivate(privateKey).getPublic('hex')

Where the privateKey is: 88575082256327777067088293295661531980671099272597078688043162004071352566123

To my knowledge, inputting this to the keyFromPrivate and getting the public key from it should give me the same value as the public key given to me in the genKeyPair() function which is: 040c395a32ce951496ff2610e57d50319d388744b84d02a0b407f3634691903252307ec63939cbd2b391545411e90c79feedece1b621150665480ea10416aa2e4f

However, this code returns a different key: 0459a50ae3c8c4015aa867d5a667b1cd7767100b66378a700df15de01e44ca509be402e8e2b8280538349844f94fc1c5f34d61b70717380cfd797d83975a5f957d

If anyone could help that would be greatly appreciated.

fanatid commented 2 years ago

Please provide code for reproducing.

webmasterinvizzo commented 1 year ago

try this test

const publicKey  = this.keyPair.getPublic().encode('hex');
const privateKey = this.keyPair.getPrivate('hex');
this.logger.error('keyPair::publicKey::', publicKey);
this.logger.error('keyPair::privateKey::', privateKey);

this.logger.warn("testKeys::recoveringValues");

const recKeyPar = ec.keyFromPrivate(privateKey,'hex');
const recPublicKey  = recKeyPar.getPublic().encode('hex');
const recPrivateKey = recKeyPar.getPrivate('hex');

this.logger.error('rec::publicKey::', recPublicKey);
this.logger.error('rec::privateKey::', recPrivateKey);