本文在oracle jdk 1.8, delphi xe3下面测试加密与解密模式都成功通过。
java端加密与解密算法代码
package com.shit;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.security.Key;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
public class AESUtil {
private static final byte[] PASSWORD=new byte[] { 't', 'e', 's', 't', '_', 'p', 'a', 's', 's', 'w', 'o', 'r', 'd','1', '2', '3' };
public static byte[] encrypt(byte[] Data) throws Exception {
Key key = new SecretKeySpec(PASSWORD, "AES");
// Cipher cipher =Cipher.getInstance("AES/ECB/PKCS5Padding");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] encVal = cipher.doFinal(Data);
return encVal;
}
public static byte[] decrypt(byte[] encryptedData) throws Exception {
Key key = new SecretKeySpec(PASSWORD, "AES");
Cipher chiper = Cipher.getInstance("AES");
chiper.init(Cipher.DECRYPT_MODE, key);
byte[] decValue = chiper.doFinal(encryptedData);
return decValue;
}
public static void encodeFile(String sourceFile,String outputFile) throws Exception {
File file = new File(sourceFile);
FileInputStream in = new FileInputStream(file);
try{
ByteArrayOutputStream bout = new ByteArrayOutputStream();
byte[] tmpbuf = new byte[1024];
int count = 0;
while ((count = in.read(tmpbuf)) != -1) {
bout.write(tmpbuf, 0, count);
tmpbuf = new byte[1024];
}
byte[] orgData = bout.toByteArray();
byte[] raw = encrypt(orgData);
file = new File(outputFile);
FileOutputStream out=null;
try {
out= new FileOutputStream(file);
out.write(raw);
} finally {
out.close();
}
}finally{
in.close();
}
}
public static void decodeFile(String sourceFile,String outputFile) throws Exception{
File file = new File(sourceFile);
FileInputStream fis = new FileInputStream(file);
try {
ByteArrayOutputStream bout = new ByteArrayOutputStream();
byte[] tmpbuf = new byte[1024];
int count = 0;
while ((count = fis.read(tmpbuf)) != -1) {
bout.write(tmpbuf, 0, count);
tmpbuf = new byte[1024];
}
byte[] orgData = bout.toByteArray();
byte[] raws = decrypt(orgData);
file = new File(outputFile);
FileOutputStream fos = null;
try {
fos = new FileOutputStream(file);
fos.write(raws);
} finally {
fos.close();
}
} finally {
fis.close();
}
}
public static void main(String[] args) {
String input_file="d:/1.jpg";
String output_file="d:/1_encrypted.jpg";
String after_decrypt_file="d:/2.jpg";
try {
encodeFile(input_file,output_file);
decodeFile(output_file,after_decrypt_file);
} catch (Exception e) {
e.printStackTrace();
}
}
}
delphi xe3这边的加密及解密关键代码
function download_file_to_stream(const url: string; outputStream: TMemoryStream): TMemoryStream;
var
h: TIdhttp;
begin
h := Tidhttp.Create(nil);
try
try
h.get(url, outputStream);
except
end;
result := outputStream;
finally
h.Free;
end;
end;
procedure TForm1.BitBtn1Click(Sender: TObject);
var
http_download_stream: TMemoryStream;
output_stream: TMemoryStream;
password:String;
begin
password:='test_password123';
http_download_stream := TMemoryStream.Create;
output_stream := TMemoryStream.Create;
try
http_download_stream := download_file_to_stream('http://localhost:8080/docs/1_encrypted.jpg', http_download_stream);
http_download_stream.Position := 0;
output_stream := DecryptStream(http_download_stream, output_stream,password) as TMemoryStream;
output_stream.Position := 0;
output_stream.SaveToFile('d:/1_de.jpg');
finally
http_download_stream.Free;
output_stream.Free;
end;
end;
delphi这一边的aes算法我测试过dcrypt2,lockbox,cryptobboxvcl等这些，结论就是以上这几个全都不能用，java里面默认的aes加密实现是128bit的AES/ECB/PKCS5Padding这种模式的，在缺省加密模式下面涉及不到IV向量这些东西，就直接
Cipher.getInstance("AES");就是AES/ECB/PKCS5Padding这种加密模式了，delphi这一边最终还是通过AES.pas和EIAES.pas这两个组件实现的，但是我下载到的源码有问题，无法完成与java之间的直接互相加解密转换，对于该代码进行了一定的修改以后才最终可以实现与java的互相加解密互换。
