Java private/public encrypt exception data must not be greater than 256 bytes
I have this code below for encrypting objects, which does a job.
But I have an object containing a list of another object. When I encrypt the object I have the error that data must be greater than 256 bytes. When I remove the list, the encryption is managed without error.
public class A {
private List<B> b = new ArrayList<>();
//getter setter
}
try {
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
encryptedBytes = cipher.doFinal(message.getBytes());
} catch (NoSuchPaddingException | NoSuchAlgorithmException | BadPaddingException
| IllegalBlockSizeException | InvalidKeySpecException | InvalidKeyException e) {
e.printStackTrace();
}
java public-key-encryption
edited Nov 21 '18 at 11:40
Lajos Arpad
27.4k1861116
asked Nov 21 '18 at 9:27
boycod3
1,32221854
add a comment |
I have this code below for encrypting objects, which does a job.
But I have an object containing a list of another object. When I encrypt the object I have the error that data must be greater than 256 bytes. When I remove the list, the encryption is managed without error.
public class A {
private List<B> b = new ArrayList<>();
//getter setter
}
try {
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
encryptedBytes = cipher.doFinal(message.getBytes());
} catch (NoSuchPaddingException | NoSuchAlgorithmException | BadPaddingException
| IllegalBlockSizeException | InvalidKeySpecException | InvalidKeyException e) {
e.printStackTrace();
}
java public-key-encryption
edited Nov 21 '18 at 11:40
Lajos Arpad
27.4k1861116
asked Nov 21 '18 at 9:27
boycod3
1,32221854
add a comment |
I have this code below for encrypting objects, which does a job.
But I have an object containing a list of another object. When I encrypt the object I have the error that data must be greater than 256 bytes. When I remove the list, the encryption is managed without error.
public class A {
private List<B> b = new ArrayList<>();
//getter setter
}
try {
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
encryptedBytes = cipher.doFinal(message.getBytes());
} catch (NoSuchPaddingException | NoSuchAlgorithmException | BadPaddingException
| IllegalBlockSizeException | InvalidKeySpecException | InvalidKeyException e) {
e.printStackTrace();
}
java public-key-encryption
edited Nov 21 '18 at 11:40
Lajos Arpad
27.4k1861116
asked Nov 21 '18 at 9:27
boycod3
1,32221854
I have this code below for encrypting objects, which does a job.
But I have an object containing a list of another object. When I encrypt the object I have the error that data must be greater than 256 bytes. When I remove the list, the encryption is managed without error.
public class A {
private List<B> b = new ArrayList<>();
//getter setter
}
try {
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
encryptedBytes = cipher.doFinal(message.getBytes());
} catch (NoSuchPaddingException | NoSuchAlgorithmException | BadPaddingException
| IllegalBlockSizeException | InvalidKeySpecException | InvalidKeyException e) {
e.printStackTrace();
}
java public-key-encryption
java public-key-encryption
edited Nov 21 '18 at 11:40
Lajos Arpad
27.4k1861116
asked Nov 21 '18 at 9:27
boycod3
1,32221854
edited Nov 21 '18 at 11:40
Lajos Arpad
27.4k1861116
asked Nov 21 '18 at 9:27
boycod3
1,32221854
edited Nov 21 '18 at 11:40
Lajos Arpad
27.4k1861116
edited Nov 21 '18 at 11:40
Lajos Arpad
27.4k1861116
edited Nov 21 '18 at 11:40
Lajos Arpad
27.4k1861116
27.4k1861116
asked Nov 21 '18 at 9:27
boycod3
1,32221854
asked Nov 21 '18 at 9:27
boycod3
1,32221854
asked Nov 21 '18 at 9:27
boycod3
1,32221854
1,32221854
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
RSA is not suitable for encrypting more than limited amounts of data. The conventional solution is hybrid encryption where the data is encrypted with a symmetric cipher with a nonce key and RSA is used to encrypt (only) the key. See for examples PKCS7/CMS/SMIME, PGP, XMLenc, JWE, SSL/TLS, and SSH.
Dupes here and cross-Stack:
Encrypting large files using a public key
How to encrypt a large file in openssl using public key
https://crypto.stackexchange.com/questions/14/how-can-i-use-asymmetric-encryption-such-as-rsa-to-encrypt-an-arbitrary-length
https://crypto.stackexchange.com/questions/3608/why-is-padding-used-for-rsa-encryption-given-that-it-is-not-a-block-cipher
https://crypto.stackexchange.com/questions/5782/why-is-asymmetric-cryptography-bad-for-huge-data
https://crypto.stackexchange.com/questions/10685/hybrid-encryption-with-rsa-and-aes-versus-spliting-into-multiple-rsa-messages
https://crypto.stackexchange.com/questions/25899/using-ecb-as-rsa-encryption-mode-when-encrypted-messages-are-unique
https://security.stackexchange.com/questions/37581/why-does-pgp-use-symmetric-encryption-and-rsa
answered Nov 21 '18 at 11:54
dave_thompson_085
13k11631
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
RSA is not suitable for encrypting more than limited amounts of data. The conventional solution is hybrid encryption where the data is encrypted with a symmetric cipher with a nonce key and RSA is used to encrypt (only) the key. See for examples PKCS7/CMS/SMIME, PGP, XMLenc, JWE, SSL/TLS, and SSH.
Dupes here and cross-Stack:
Encrypting large files using a public key
How to encrypt a large file in openssl using public key
https://crypto.stackexchange.com/questions/14/how-can-i-use-asymmetric-encryption-such-as-rsa-to-encrypt-an-arbitrary-length
https://crypto.stackexchange.com/questions/3608/why-is-padding-used-for-rsa-encryption-given-that-it-is-not-a-block-cipher
https://crypto.stackexchange.com/questions/5782/why-is-asymmetric-cryptography-bad-for-huge-data
https://crypto.stackexchange.com/questions/10685/hybrid-encryption-with-rsa-and-aes-versus-spliting-into-multiple-rsa-messages
https://crypto.stackexchange.com/questions/25899/using-ecb-as-rsa-encryption-mode-when-encrypted-messages-are-unique
https://security.stackexchange.com/questions/37581/why-does-pgp-use-symmetric-encryption-and-rsa
answered Nov 21 '18 at 11:54
dave_thompson_085
13k11631
add a comment |
RSA is not suitable for encrypting more than limited amounts of data. The conventional solution is hybrid encryption where the data is encrypted with a symmetric cipher with a nonce key and RSA is used to encrypt (only) the key. See for examples PKCS7/CMS/SMIME, PGP, XMLenc, JWE, SSL/TLS, and SSH.
Dupes here and cross-Stack:
Encrypting large files using a public key
How to encrypt a large file in openssl using public key
https://crypto.stackexchange.com/questions/14/how-can-i-use-asymmetric-encryption-such-as-rsa-to-encrypt-an-arbitrary-length
https://crypto.stackexchange.com/questions/3608/why-is-padding-used-for-rsa-encryption-given-that-it-is-not-a-block-cipher
https://crypto.stackexchange.com/questions/5782/why-is-asymmetric-cryptography-bad-for-huge-data
https://crypto.stackexchange.com/questions/10685/hybrid-encryption-with-rsa-and-aes-versus-spliting-into-multiple-rsa-messages
https://crypto.stackexchange.com/questions/25899/using-ecb-as-rsa-encryption-mode-when-encrypted-messages-are-unique
https://security.stackexchange.com/questions/37581/why-does-pgp-use-symmetric-encryption-and-rsa
answered Nov 21 '18 at 11:54
dave_thompson_085
13k11631
add a comment |
RSA is not suitable for encrypting more than limited amounts of data. The conventional solution is hybrid encryption where the data is encrypted with a symmetric cipher with a nonce key and RSA is used to encrypt (only) the key. See for examples PKCS7/CMS/SMIME, PGP, XMLenc, JWE, SSL/TLS, and SSH.
Dupes here and cross-Stack:
Encrypting large files using a public key
How to encrypt a large file in openssl using public key
https://crypto.stackexchange.com/questions/14/how-can-i-use-asymmetric-encryption-such-as-rsa-to-encrypt-an-arbitrary-length
https://crypto.stackexchange.com/questions/3608/why-is-padding-used-for-rsa-encryption-given-that-it-is-not-a-block-cipher
https://crypto.stackexchange.com/questions/5782/why-is-asymmetric-cryptography-bad-for-huge-data
https://crypto.stackexchange.com/questions/10685/hybrid-encryption-with-rsa-and-aes-versus-spliting-into-multiple-rsa-messages
https://crypto.stackexchange.com/questions/25899/using-ecb-as-rsa-encryption-mode-when-encrypted-messages-are-unique
https://security.stackexchange.com/questions/37581/why-does-pgp-use-symmetric-encryption-and-rsa
answered Nov 21 '18 at 11:54
dave_thompson_085
13k11631
RSA is not suitable for encrypting more than limited amounts of data. The conventional solution is hybrid encryption where the data is encrypted with a symmetric cipher with a nonce key and RSA is used to encrypt (only) the key. See for examples PKCS7/CMS/SMIME, PGP, XMLenc, JWE, SSL/TLS, and SSH.
Dupes here and cross-Stack:
Encrypting large files using a public key
How to encrypt a large file in openssl using public key
https://crypto.stackexchange.com/questions/14/how-can-i-use-asymmetric-encryption-such-as-rsa-to-encrypt-an-arbitrary-length
https://crypto.stackexchange.com/questions/3608/why-is-padding-used-for-rsa-encryption-given-that-it-is-not-a-block-cipher
https://crypto.stackexchange.com/questions/5782/why-is-asymmetric-cryptography-bad-for-huge-data
https://crypto.stackexchange.com/questions/10685/hybrid-encryption-with-rsa-and-aes-versus-spliting-into-multiple-rsa-messages
https://crypto.stackexchange.com/questions/25899/using-ecb-as-rsa-encryption-mode-when-encrypted-messages-are-unique
https://security.stackexchange.com/questions/37581/why-does-pgp-use-symmetric-encryption-and-rsa
answered Nov 21 '18 at 11:54
dave_thompson_085
13k11631
answered Nov 21 '18 at 11:54
dave_thompson_085
13k11631
answered Nov 21 '18 at 11:54
dave_thompson_085
13k11631
answered Nov 21 '18 at 11:54
dave_thompson_085
13k11631
13k11631
add a comment |
add a comment |
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