Your client need have a pair - his keys - and then he should give you his public key. If you encrypt the message with his key, he will read it using his private key.
If you sign the message with your private key, he will verify the message using your public key. Users give to others only public keys, private keys are kept on their side. Of course you may prepare key pair for your client and give them to him, but to encrypt the message you need only his key. I have an impression you want to encrypt and sign using this same keypair, and then use this same keypair to read/verify the message. It is not really a good approach I think. -- Pozdrawiam Paweł Górny Sent from my BlackBerry Passport Original Message From: Bruno Barberi Gnecco Sent: wtorek, 18 sierpnia 2015 23:50 To: OpenPGP.js Mailing List Reply To: OpenPGP.js Mailing List Subject: Re: [openpgpjs] Decrypting with a public key Thanks for the fast response! But I don't want to send both the private and the public key to the client. It would easily defeat any security. > You should use > > signAndEncryptMessage > > http://openpgpjs.org/openpgpjs/doc/openpgp.js.html#line93 > > If you want to encrypt - you need public key of the recipient, if you want to > decrypt - > your private key; > If you want to sign - your private key. If you want to verify signature - > public key of > the sender. > > W dniu 18.08.2015 o 23:09, Bruno Barberi Gnecco pisze: >> Hi, >> >> I posted this as an issue but it seems more appropriate to this list. >> >> Is it possible to encrypt with a private key and decrypt with a public key? >> I want to send >> data that is guaranteed to be from a sender and I'd rather not send it as >> clear text, so >> just signClearMessage() is not an option. decryptAndVerifyMessage() requires >> both the >> public and private keys, so also not an option. >> >> I can encrypt with a private key easily: >> >> var publicKey = openpgp.key.readArmored(fs.readFileSync('public.key', >> 'utf-8')); >> var privateKey = openpgp.key.readArmored(fs.readFileSync('private.key', >> 'utf-8')).keys[0]; >> privateKey.decrypt(PASSPHRASE); >> openpgp.encryptMessage(privateKey, text).then(function(pgpMessage){ // yes, >> private }); >> >> But trying to decrypt with a public key does not work. This returns Error: >> Private key is >> not decrypted. >> >> pgpMessage = openpgp.message.readArmored(pgpMessage); >> openpgp.decryptMessage(publicKey.keys[0], pgpMessage).then(function(plain) { >> .... >> }); >> >> But publicKey.keys[0].decrypt(PASSPHRASE) throw Error: Nothing to decrypt in >> a public key. >> >> Any tips? >> >> _______________________________________________ >> >> http://openpgpjs.org >> Subscribe/unsubscribe:http://list.openpgpjs.org > > > -- > Paweł Górny > mailto:[email protected] http://pawelgorny.com > * only way to feel the noise is when it's good and loud * > > In reply please use the key: 0xF0F72044 > > > > _______________________________________________ > > http://openpgpjs.org > Subscribe/unsubscribe: http://list.openpgpjs.org > -- Bruno Barberi Gnecco <[email protected]> Corollarium Tecnologia - Solutions for high performance data visualization http://www.corollarium.com/ - +55 11 4165-2936 - Skype: bruno.bg _______________________________________________ http://openpgpjs.org Subscribe/unsubscribe: http://list.openpgpjs.org _______________________________________________ http://openpgpjs.org Subscribe/unsubscribe: http://list.openpgpjs.org
