Hey,
why do you want to encrypt data using the private key? That process is
usually known as "signing" and you should be really careful doing so. In
some cases it might even break the algorithm when done wrong! *cough*
ElGamal *cough* *cough*
Greets Elias
On 2/8/11 11:42 AM, Leo Mifare wrote:
Hi friends..
i'm really confused how to encrypt data using PrivateKey , NO Padding,
and Decrypt it using PublicKey.
Hmm, actually i can solve this problem easily using Java..
But i want implement the process in my C++ application..
*Snippet Code :*
byte[] inputEncryption =
ByteUtils.StringToHex("@ABCDEFGHIJKLMNO@ABCDEFGHIJKLMNO@ABCDEFGHIJKLMNO@ABCDEFGHIJKLMNO");
//404142434445464748494A4B4C4D4E4F404142434445464748494A4B4C4D4E4F404142434445464748494A4B4C4D4E4F404142434445464748494A4B4C4D4E4F
Cipher rsaCipher2 = Cipher.getInstance("RSA/None/NoPadding");
RSAPublicKey myPubKEY = (RSAPublicKey)
KeyFactory.getInstance("RSA").generatePublic(rsaPublicKeySpec);
RSAPrivateKey myPrivKEY = (RSAPrivateKey)
KeyFactory.getInstance("RSA").generatePrivate(rsaPrivateKeySpec);
rsaCipher2.init(Cipher.ENCRYPT_MODE, myPrivKEY);
byte[] output = rsaCipher2.doFinal(inputEncryption);
System.out.println("OUTPUT Encryption = " +
ByteUtils.HexToString(output));
rsaCipher2.init(Cipher.DECRYPT_MODE, myPubKEY);
output = rsaCipher2.doFinal(output);
System.out.println("OUTPUT = " + ByteUtils.HexToString(output));
*Snippet Console Output :*
RSA Private Key Modulus =
00A9C985E853C94ADDA1969486896B657257580E695C7C92AC891DCB4041C8552F6F30CC9B7CA97C1213E31C8C8985EFB475B5572B73BE4446077AC31E614DFA67
RSA Private Key Exponent =
00806DDC69997F28AF2EFC7D0AAB45DE6DB81DF680C221C4BCD7D6FE987369FAEC73CB964D6E3F5C87BE3DBE8FE034FC96D13940E51EC4D82B791E84B334C951B9
Encrypted Data =
903B72E6DA4BEB674670A7723E17CFE6D6CC0939BD4CD43166B49A10194B3AC08F3433C1CF2484CC25C233AEA9A958DBF128AA19D8555BD87BA618E497B414B9
Decrypted Data =
404142434445464748494A4B4C4D4E4F404142434445464748494A4B4C4D4E4F404142434445464748494A4B4C4D4E4F404142434445464748494A4B4C4D4E4F
How to achieve that using Cryptopp
Please help me regarding this..
Sorry i'm pretty new in this field..
Thanks
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