cn.ponfee.commons.jce.implementation.rsa

类 AbstractRSACryptor

java.lang.Object

cn.ponfee.commons.jce.implementation.Cryptor

cn.ponfee.commons.jce.implementation.rsa.AbstractRSACryptor

直接已知子类:

RSAHashCryptor, RSANoPaddingCryptor, RSAPKCS1PaddingCryptor

public abstract class AbstractRSACryptor
extends Cryptor

http://blog.51cto.com/xnuil/1698673 RSA Cryptor, Without padding RSA私钥解密证明：费马小定理（欧拉定理特例） 等同证明：c^d ≡ m (mod n) 因为：m^e ≡ c (mod n) 于是，c可以写成：c = m^e - kn 将c代入要我们要证明的那个解密规则：(m^e - kn)^d ≡ m (mod n) 等同证明：m^(ed) ≡ m (mod n) 由于：ed ≡ 1 (mod φ(n)) 所以：ed = hφ(n)+1 得出：m^(hφ(n)+1) ≡ m (mod n)

作者:

Ponfee

构造器概要

构造器

构造器和说明
AbstractRSACryptor(boolean isPadding)

方法概要

限定符和类型	方法和说明
byte[]	decrypt(byte[] input, Key dk) decrypt the cipher use decrypt key
void	decrypt(InputStream input, Key dk, OutputStream output)
byte[]	encrypt(byte[] input, int length, Key ek) encrypt original data in length byte
void	encrypt(InputStream input, Key ek, OutputStream output)
Key	generateKey() This method generates a new key for the crypto.
Key	generateKey(int keySize)
int	getCipherBlockSize(RSAKey rsaKey)
BigInteger	getExponent(RSAKey rsaKey)
int	getOriginBlockSize(RSAKey rsaKey)
String	toString()

从类继承的方法 cn.ponfee.commons.jce.implementation.Cryptor

encrypt

从类继承的方法 java.lang.Object

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

构造器详细资料

AbstractRSACryptor

public AbstractRSACryptor(boolean isPadding)

方法详细资料

getOriginBlockSize

public int getOriginBlockSize(RSAKey rsaKey)

getCipherBlockSize

public int getCipherBlockSize(RSAKey rsaKey)

encrypt

public byte[] encrypt(byte[] input,
                      int length,
                      Key ek)

从类复制的说明: Cryptor

encrypt original data in length byte

指定者:

encrypt 在类中 Cryptor

length - the byte length of original

ek - encrypt key

返回:

decrypt

public byte[] decrypt(byte[] input,
                      Key dk)

从类复制的说明: Cryptor

decrypt the cipher use decrypt key

指定者:

decrypt 在类中 Cryptor

返回:

encrypt

public void encrypt(InputStream input,
                    Key ek,
                    OutputStream output)

decrypt

public void decrypt(InputStream input,
                    Key dk,
                    OutputStream output)

getExponent

public final BigInteger getExponent(RSAKey rsaKey)

generateKey

public final Key generateKey()

This method generates a new key for the crypto.

指定者:

generateKey 在类中 Cryptor

返回:

the new key generated

generateKey

public final Key generateKey(int keySize)

toString

public final String toString()

覆盖:

toString 在类中 Object