rsapublickey未定义怎么处理

如题所述

第1个回答  推荐于2016-04-20
 //将byte数组变成RSAPublicKey
  public RSAPublicKey bytes2PK(byte[] buf) {
   buf=Base64.decode(buf);
   byte size=buf[0];
   byte size2=buf[1];
   byte[] b1 = new byte[size];
   System.arraycopy(buf,2,b1,0,b1.length);
   byte[] b2 = new byte[size2];
   System.arraycopy(buf,b1.length+2,b2,0,b2.length);
   BigInteger B1 = new BigInteger(b1);
   BigInteger B2 = new BigInteger(b2);
   RSAPublicKeySpec spec = new RSAPublicKeySpec(B1, B2);//存储的就是这两个大整形数
   KeyFactory keyFactory;
   PublicKey pk = null;
   try {
   keyFactory = KeyFactory.getInstance("RSA");
   pk = keyFactory.generatePublic(spec);
   } catch (Exception e) {
   e.printStackTrace();
   }
  return (RSAPublicKey)pk;
  }本回答被提问者和网友采纳
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