本文整理汇总了Java中org.bouncycastle.crypto.encodings.OAEPEncoding.getInputBlockSize方法的典型用法代码示例。如果您正苦于以下问题：Java OAEPEncoding.getInputBlockSize方法的具体用法？Java OAEPEncoding.getInputBlockSize怎么用？Java OAEPEncoding.getInputBlockSize使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.bouncycastle.crypto.encodings.OAEPEncoding的用法示例。
在下文中一共展示了OAEPEncoding.getInputBlockSize方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: asymEncrypt
import org.bouncycastle.crypto.encodings.OAEPEncoding; //导入方法依赖的package包/类
/**
* encrypt data with asymmetric key. create asymmetricla encrypted data:<br>
* <ul>
* <li>OAEP padding [42 bytes] (RSA-encrypted)
* <li>Symmetric key [16 bytes] FIXME: we assume that we ALWAYS need this
* <li>First part of data [70 bytes]
* <li>Second part of data [x-70 bytes] (Symmetrically encrypted)
* <ul>
* encrypt and store in result
*
* @param pub
* @param symmetricKey AES key
* @param data
* to be encrypted, needs currently to be at least 70 bytes long
* @return the first half of the key exchange, ready to be send to the other
* partner
*/
public static byte[] asymEncrypt(RSAPublicKey pub, byte[] symmetricKey, byte[] data) throws TorException {
if (data == null) {
throw new NullPointerException("can't encrypt NULL data");
}
if (data.length < 70) {
throw new TorException("input array too short");
}
try {
int encryptedBytes = 0;
// initialize OAEP
OAEPEncoding oaep = new OAEPEncoding(new RSAEngine());
oaep.init(true, new RSAKeyParameters(false, pub.getModulus(), pub.getPublicExponent()));
// apply RSA+OAEP
encryptedBytes = oaep.getInputBlockSize();
byte[] oaepInput = new byte[encryptedBytes];
System.arraycopy(data, 0, oaepInput, 0, encryptedBytes);
byte[] part1 = oaep.encodeBlock(oaepInput, 0, encryptedBytes);
// initialize AES
AESCounterMode aes = new AESCounterMode(true, symmetricKey);
// apply AES
byte[] aesInput = new byte[data.length - encryptedBytes];
System.arraycopy(data, encryptedBytes, aesInput, 0, aesInput.length);
byte part2[] = aes.processStream(aesInput);
// replace unencrypted data
byte[] result = new byte[part1.length + part2.length];
System.arraycopy(part1, 0, result, 0, part1.length);
System.arraycopy(part2, 0, result, part1.length, part2.length);
return result;
} catch (InvalidCipherTextException e) {
log.severe("Node.asymEncrypt(): can't encrypt cipher text:" + e.getMessage());
throw new TorException("InvalidCipherTextException:" + e.getMessage());
}
}
示例2: asymDecrypt
import org.bouncycastle.crypto.encodings.OAEPEncoding; //导入方法依赖的package包/类
/**
* decrypt data with asymmetric key. create asymmetrically encrypted data:<br>
* <ul>
* <li>OAEP padding [42 bytes] (RSA-encrypted)</li>
* <li>Symmetric key [16 bytes]</li>
* <li>First part of data [70 bytes]</li>
* <li>Second part of data [x-70 bytes] (Symmetrically encrypted)</li>
* </ul>
* encrypt and store in result
*
* @param priv key to use for decryption
* @param data to be decrypted, needs currently to be at least 70 bytes long
* @return raw data
*/
public static byte[] asymDecrypt(final RSAPrivateKey priv, final byte[] data) throws TorException {
if (data == null) {
throw new NullPointerException("can't encrypt NULL data");
}
if (data.length < 70) {
throw new TorException("input array too short");
}
try {
int encryptedBytes = 0;
// init OAEP
final OAEPEncoding oaep = new OAEPEncoding(new RSAEngine());
oaep.init(false, new RSAKeyParameters(true, priv.getModulus(), priv.getPrivateExponent()));
// apply RSA+OAEP
encryptedBytes = oaep.getInputBlockSize();
final byte[] oaepInput = new byte[encryptedBytes];
System.arraycopy(data, 0, oaepInput, 0, encryptedBytes);
final byte[] part1 = oaep.decodeBlock(oaepInput, 0, encryptedBytes);
// extract symmetric key
final byte[] symmetricKey = new byte[16];
System.arraycopy(part1, 0, symmetricKey, 0, 16);
// init AES
final AESCounterMode aes = new AESCounterMode(symmetricKey);
// apply AES
final byte[] aesInput = new byte[data.length - encryptedBytes];
System.arraycopy(data, encryptedBytes, aesInput, 0, aesInput.length);
final byte[] part2 = aes.processStream(aesInput);
// replace unencrypted data
final byte[] result = new byte[part1.length - 16 + part2.length];
System.arraycopy(part1, 16, result, 0, part1.length - 16);
System.arraycopy(part2, 0, result, part1.length - 16, part2.length);
return result;
} catch (final InvalidCipherTextException e) {
logger.error("Encryption.asymDecrypt(): can't decrypt cipher text:" + e.getMessage());
throw new TorException("Encryption.asymDecrypt(): InvalidCipherTextException:" + e.getMessage());
}
}
示例3: asymDecrypt
import org.bouncycastle.crypto.encodings.OAEPEncoding; //导入方法依赖的package包/类
/**
* decrypt data with asymmetric key. create asymmetrically encrypted data:<br>
* <ul>
* <li>OAEP padding [42 bytes] (RSA-encrypted)
* <li>Symmetric key [16 bytes]
* <li>First part of data [70 bytes]
* <li>Second part of data [x-70 bytes] (Symmetrically encrypted)
* <ul>
* encrypt and store in result
*
* @param priv
* key to use for decryption
* @param data
* to be decrypted, needs currently to be at least 70 bytes long
* @return raw data
*/
public static byte[] asymDecrypt(RSAPrivateKey priv, byte[] data)
throws TorException {
if (data == null) {
throw new NullPointerException("can't encrypt NULL data");
}
if (data.length < 70) {
throw new TorException("input array too short");
}
try {
int encryptedBytes = 0;
// init OAEP
OAEPEncoding oaep = new OAEPEncoding(new RSAEngine());
oaep.init(false, new RSAKeyParameters(true, priv.getModulus(), priv.getPrivateExponent()));
// apply RSA+OAEP
encryptedBytes = oaep.getInputBlockSize();
byte[] oaepInput = new byte[encryptedBytes];
System.arraycopy(data, 0, oaepInput, 0, encryptedBytes);
byte[] part1 = oaep.decodeBlock(oaepInput, 0, encryptedBytes);
// extract symmetric key
byte[] symmetricKey = new byte[16];
System.arraycopy(part1, 0, symmetricKey, 0, 16);
// init AES
AESCounterMode aes = new AESCounterMode(true, symmetricKey);
// apply AES
byte[] aesInput = new byte[data.length - encryptedBytes];
System.arraycopy(data, encryptedBytes, aesInput, 0, aesInput.length);
byte part2[] = aes.processStream(aesInput);
// replace unencrypted data
byte[] result = new byte[part1.length - 16 + part2.length];
System.arraycopy(part1, 16, result, 0, part1.length - 16);
System.arraycopy(part2, 0, result, part1.length - 16, part2.length);
return result;
} catch (InvalidCipherTextException e) {
log.severe("CommonEncryption.asymDecrypt(): can't decrypt cipher text:" + e.getMessage());
throw new TorException("CommonEncryption.asymDecrypt(): InvalidCipherTextException:" + e.getMessage());
}
}