Java：使用 java.util.Base64 与 android.util.Base64 解码 base64 字符串时的不同结果
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/32935783/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Java: Different results when decoding base64 string with java.util.Base64 vs android.util.Base64
提问by Parker Kemp
I'm working on a client/server system and I'm trying to do some basic encryption. When I connect to the server, I send a public key as an escaped string across the socket. I've verified that the string is identicalon both ends, newlines and all.
我正在开发客户端/服务器系统，并且正在尝试进行一些基本的加密。当我连接到服务器时，我通过套接字发送一个公钥作为转义字符串。我已经验证字符串两端、换行符和所有字符串都是相同的。
On the client (Android), I'm able to use the public/private keys to successfully encrypt and decrypt a secret key (for testing purposes). However, the server fails right out of the gate when trying to decode the public key from a String to a byte[], with:
在客户端 (Android) 上，我可以使用公钥/私钥成功加密和解密密钥（用于测试目的）。但是，服务器在尝试将公钥从 String 解码为 byte[] 时立即失败，使用：
java.lang.IllegalArgumentException: Illegal base64 character a
which seems preposterous, as 'a' is absolutely a base64 character, if I understand correctly. The client and server use a shared library to handle all encryption, so the code is nearly identical. The onlydifference is encoding/decoding base64 Strings, since java.util.Base64 is unavailable on Android.
这似乎很荒谬，因为如果我理解正确的话，'a' 绝对是一个 base64 字符。客户端和服务器使用共享库来处理所有加密，因此代码几乎相同。的唯一差别是编码/解码的base64字符串，由于java.util.Base64是在Android不可用。
Shared class
共享类
public abstract class EasyCrypt {
...
public PublicKey loadPublicKey(String key64) throws GeneralSecurityException {
byte[] data = decode(key64); //Calls abstract methods, shown below
X509EncodedKeySpec spec = new X509EncodedKeySpec(data);
KeyFactory fact = KeyFactory.getInstance("RSA");
return fact.generatePublic(spec);
}
...
}
Client (Android) methods
客户端 (Android) 方法
import android.util.Base64;
public class ClientCrypt extends EasyCrypt {
@Override
protected byte[] decode(String s) {
return Base64.decode(s.getBytes(), Base64.DEFAULT); //Works perfectly
}
@Override
protected String encode(byte[] bytes) {
return Base64.encodeToString(bytes, Base64.DEFAULT);
}
}
}
Server (Linux) methods
服务器 (Linux) 方法
import java.util.Base64;
public class ServerCrypt extends EasyCrypt{
@Override
public byte[] decode(String str){
return Base64.getDecoder().decode(str); //Throws IllegalArgumentException
}
@Override
public String encode(byte[] bytes){
return Base64.getEncoder().encodeToString(bytes);
}
}
}
采纳答案by Mohammad Adil
On android, Use Base64.NO_WRAPinstead of Base64.DEFAULT
在 android 上，使用Base64.NO_WRAP代替Base64.DEFAULT
@Override
protected String encode(byte[] bytes) {
return Base64.encodeToString(bytes, Base64.NO_WRAP);
}
回答by S Shepard
Instead of Base64.getDecoder()use Base64.getMimeDecoder().
而不是Base64.getDecoder()使用Base64.getMimeDecoder().
