原因： base64编码公钥问题
/**
* RSA最大加密明文大小
*/
private static final int MAX_ENCRYPT_BLOCK =117;
/**
* RSA公钥加密, 实现分段加密
* @param str
* 加密字符串
* @param publicKey
* 公钥
* @return 密文
* @throws Exception
* 加密过程中的异常信息
*/
public static String encrypt( String str, String publicKey ) throws Exception{
//base64编码的公钥
// byte[] decoded = Base64.decodeBase64(publicKey); 错误使用方式
byte[] decoded = (new BASE64Decoder()).decodeBuffer(publicKey); // 正确方式
RSAPublicKey pubKey = (RSAPublicKey) KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(decoded));
//RSA加密
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.ENCRYPT_MODE, pubKey);
byte[] data = str.getBytes();
int inputLen = data.length;
ByteArrayOutputStream out =new ByteArrayOutputStream();
int offSet =0;
byte[] cache;
int i =0;
try {
// 对数据分段加密
while (inputLen - offSet >0) {
if (inputLen - offSet >MAX_ENCRYPT_BLOCK) {
cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
}else {
cache = cipher.doFinal(data, offSet, inputLen - offSet);
}
out.write(cache, 0, cache.length);
i++;
offSet = i *MAX_ENCRYPT_BLOCK;
}
byte[] encryptedData = out.toByteArray();
return Base64.encodeBase64String(encryptedData);
}finally {
if (out!=null) {
out.close();
}
}
