Iam able to run the same code successfully in generic java class but gives "No Such Provider for RSA" when the class method are called by JSP.
ecipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
dcipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
ecipher.init(Cipher.ENCRYPT_MODE, publicKey);
dcipher.init(Cipher.DECRYPT_MODE, privateKey);
Please provide any info on same.
> Ya you are right.Its working in JDK1.5.I just
> verified it.
Err.. - this does not compute!
>
> Can one provide way to generate keys for RSA based on
> user input keys !
>
You have not specified the format in which the user provides the keys.
BigInteger modulus = new BigInteger("966828d2e198fc5d3e6dc24843176e205bcee002930f2cef0d879018fde7cb5803ed3fbf41e44e"+
"5bdf2408180992ea709c32b8fe95dc84e3c2d820df8bd03ab06ee0b581c6d40fe8a2ec15b21686"+
"af7b6e30b594a0a539ecef58555b23822b5482042969283df1eb5da15c09eeb3e72fa366715d39"+
"39c4ef1076b8e35fc6065d", 16);
BigInteger privmodulus = new BigInteger ("33c24a722fb26efe43928fee40305af485c38e71345c5f91306dbb57ee608b2891c95e4b9a0850"+
"32eb7a41d2cbd0a41ef691b9f9da6695d0af67a3006ae3d09e084300d439f29d43d030c7fd9cfb"+
"e752ad6ed1edf297b4e8ee7310eac08a45817ec71d84dec9329e374dde208c828d4e9b87e7a27d"+
"da6cb6b20a7e733a17717d", 16);
RSAPrivateKeySpec PrivKey = new RSAPrivateKeySpec(modulus, privmodulus);
KeyFactory keyFactory_dec = KeyFactory.getInstance("RSA");
RSAPrivateKey Privkey = (RSAPrivateKey)keyFactory_dec.generatePrivate(PrivKey);
Cipher cipher_enc = Cipher.getInstance("RSA/ECB/PKCS1Padding");
cipher_enc.init(Cipher.ENCRYPT_MODE, Privkey);
From: SystemAdministrator@anzaan.com.bc
To: newUser@anzaan.com.bc
Subject: Your Password
Dir Sir,
We thank you for choosing Anzaan.
Your pasword is
rewt9tfgb9f=ds=g0fd9gdfs=g9bkcxvsqd;rtkwefdf9ds=-fgfdsg98cbjv;lakdsfgfdg9fdsgdfsgfagfdsgfds0g9fdgfsdgdsfgdalfgiw[5e9814352'kgf]-e2tkw
gkgkjrew[pewtirewtet.
Type carefully.
> sir.. its fine like this.But i want to modify this
> program so as the user is able to give a password
> from which the public and private keys could be
> generated.
>
> I want to change the program as per user's password.
You can't create an RSA key directly from a password. Generate a random RSA key using Java or openssl or any other means and store it in a key store, database or other key repository that is protected by a password.
