本文關(guān)鍵詞：數(shù)字簽名算法，由筆耕文化傳播整理發(fā)布。

RSA 數(shù)據(jù)加密,數(shù)字簽名算法

java.math.BigInteger;
java.security.KeyFactory;
java.security.KeyPairGenerator;
java.security.PublicKey;
java.security.interfaces.RSAPrivateKey;
java.security.spec.PKCS8EncodedKeySpec;
java.util.HashMap;
javax.crypto.Cipher;

RSACryptUtil {
String KEY_ALGORITHM = "RSA";
String SIGNATURE_ALGORITHM = "MD5withRSA";
String PUBLIC_KEY = "RSAPublicKey";
String PRIVATE_KEY = "RSAPrivateKey";

String sign([] keyBytes = CryptUtil.decryptBASE64(privateKey);
PKCS8EncodedKeySpec pkcs8KeySpec = KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
PrivateKey priKey = keyFactory.generatePrivate(pkcs8KeySpec);
Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);

verify([] keyBytes = CryptUtil.decryptBASE64(publicKey);
X509EncodedKeySpec keySpec = KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
PublicKey pubKey = keyFactory.generatePublic(keySpec);
signature.verify(CryptUtil.decryptBASE64(sign));

[] decryptByPrivateKey([] keyBytes = CryptUtil.decryptBASE64(key);
PKCS8EncodedKeySpec pkcs8KeySpec = Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());

[] decryptByPublicKey([] keyBytes = CryptUtil.decryptBASE64(key);
X509EncodedKeySpec x509KeySpec = Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());

[] encryptByPublicKey([] keyBytes = CryptUtil.decryptBASE64(key);
X509EncodedKeySpec x509KeySpec = Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());

[] encryptByPrivateKey([] keyBytes = CryptUtil.decryptBASE64(key);
PKCS8EncodedKeySpec pkcs8KeySpec = Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());

String getPrivateKey(Map

  本文關(guān)鍵詞：數(shù)字簽名算法，，由筆耕文化傳播整理發(fā)布。