Package com.nimbusds.jose.crypto.impl

Class RSA_OAEP_SHA2

java.lang.Object

com.nimbusds.jose.crypto.impl.RSA_OAEP_SHA2

@ThreadSafe
public class RSA_OAEP_SHA2
extends Object

RSAES OAEP with SHA-256, SHA-384 and SHA-512 methods for Content Encryption Key (CEK) encryption and decryption. This class is thread-safe.

Version:

2021-09-24

Author:

Vladimir Dzhuvinov, Justin Richer, Peter Laurina

Method Summary

Modifier and Type	Method	Description
static SecretKey	decryptCEK(PrivateKey priv, byte[] encryptedCEK, int shaBitSize, Provider provider)	Decrypts the specified encrypted Content Encryption Key (CEK).
static byte[]	encryptCEK(RSAPublicKey pub, SecretKey cek, int shaBitSize, Provider provider)	Encrypts the specified Content Encryption Key (CEK).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

encryptCEK

public static byte[] encryptCEK(RSAPublicKey pub,
                                SecretKey cek,
                                int shaBitSize,
                                Provider provider)
                         throws JOSEException

Encrypts the specified Content Encryption Key (CEK).

Parameters:

pub - The public RSA key. Must not be null.

cek - The Content Encryption Key (CEK) to encrypt. Must not be null.

shaBitSize - The SHA-2 bit size. Must be 256, 384 or 512.

provider - The JCA provider, or null to use the default one.

Returns:

The encrypted Content Encryption Key (CEK).

Throws:

JOSEException - If encryption failed.

decryptCEK

public static SecretKey decryptCEK(PrivateKey priv,
                                   byte[] encryptedCEK,
                                   int shaBitSize,
                                   Provider provider)
                            throws JOSEException

Decrypts the specified encrypted Content Encryption Key (CEK).

Parameters:

priv - The private RSA key. Must not be null.

encryptedCEK - The encrypted Content Encryption Key (CEK) to decrypt. Must not be null.

shaBitSize - The SHA-2 bit size. Must be 256 or 512.

provider - The JCA provider, or null to use the default one.

Returns:

The decrypted Content Encryption Key (CEK).

Throws:

JOSEException - If decryption failed.