java– 解密过程中损坏的pad块(Android)

概述我正在加密java中的文件,并将加密的文件和私钥发送到Android设备.但是在解密Android中的文件时,它会给pad块损坏错误.顺便说一句,相同的解密代码在PC上工作这是加密：public void encrypt(File inf, File outf, File publicKey, int userId, int resourceId) thro

我正在加密java中的文件,并将加密的文件和私钥发送到Android设备.但是在解密AndroID中的文件时,它会给pad块损坏错误.
顺便说一句,相同的解密代码在PC上工作

这是加密：

public voID encrypt(file inf,file outf,file publicKey,int userID,int resourceID) throws ArServerconnectionexception {    // ENCRYPTION BEGIN    try {        pkCipher = Cipher.getInstance("RSA");    } catch (NoSuchAlgorithmException e) {        // Todo auto-generated catch block        e.printstacktrace();    } catch (NoSuchpaddingException e) {        // Todo auto-generated catch block        e.printstacktrace();    }    // create AES shared key cipher    try {        aesCipher = Cipher.getInstance("AES");    } catch (NoSuchAlgorithmException e) {        // Todo auto-generated catch block        e.printstacktrace();    } catch (NoSuchpaddingException e) {        // Todo auto-generated catch block        e.printstacktrace();    }    try {        makeKey();    } catch (NoSuchAlgorithmException e) {        // Todo auto-generated catch block        e.printstacktrace();    }            // file operation            try {        saveKey(new file(System.getProperty("user.home") + "/" + userID                + "/keyfile"),publicKey);    } catch (IOException e) {        // Todo auto-generated catch block        e.printstacktrace();    } catch (GeneralSecurityException e) {        // Todo auto-generated catch block        e.printstacktrace();    }    // file operation    try {        encryptfiles(inf,outf);    } catch (InvalIDKeyException e) {        // Todo auto-generated catch block        e.printstacktrace();    } catch (IOException e) {        // Todo auto-generated catch block        e.printstacktrace();    }    // /ENCRYPTION END}    public voID saveKey(file out,file publicKeyfile) throws IOException,GeneralSecurityException {    // read public key to be used to encrypt the AES key    byte[] encodedKey = new byte[(int) publicKeyfile.length()];    new fileinputStream(publicKeyfile).read(encodedKey);    // create public key    X509EncodedKeySpec publicKeySpec = new X509EncodedKeySpec(encodedKey);    KeyFactory kf = KeyFactory.getInstance("RSA");    PublicKey pk = kf.generatePublic(publicKeySpec);    // write AES key    pkCipher.init(Cipher.ENCRYPT_MODE,pk);    CipherOutputStream os = new CipherOutputStream(            new fileOutputStream(out),pkCipher);    os.write(aesKey);    os.close();}    public voID makeKey() throws NoSuchAlgorithmException {    KeyGenerator kgen = KeyGenerator.getInstance("AES");    kgen.init(AES_Key_Size);    SecretKey key = kgen.generateKey();    aesKey = key.getEncoded();    aeskeySpec = new SecretKeySpec(aesKey,"AES");}

这是解密部分：

public class fileDecrypt {    public static final int AES_Key_Size = 256;    Cipher pkCipher,aesCipher;    byte[] aesKey;    SecretKeySpec aeskeySpec;    private String pubKeyPath=null;    private String prvKeyPath=null;    private String keyfilePath=null;    private String encfilePath=null;    private String unencfilePath=null;    public String getEncfilePath() {        return encfilePath;    }    public voID setEncfilePath(String encfilePath) {        this.encfilePath = encfilePath;    }    public String getUnencfilePath() {        return unencfilePath;    }    public voID setUnencfilePath(String unencfilePath) {        this.unencfilePath = unencfilePath;    }    public String getPubKeyPath() {        return pubKeyPath;    }    public voID setPubKeyPath(String pubKeyPath) {        this.pubKeyPath = pubKeyPath;    }    public String getPrvKeyPath() {        return prvKeyPath;    }    public voID setPrvKeyPath(String prvKeyPath) {        this.prvKeyPath = prvKeyPath;    }    public String getKeyfilePath() {        return keyfilePath;    }    public voID setKeyfilePath(String keyfilePath) {        this.keyfilePath = keyfilePath;    }    public voID decrypt() {        Log.i("DECRYPT","**************************************************DECRYPT&*******************");        Log.i("encfilePath",encfilePath);        Log.i("pubKeyPath",pubKeyPath);        Log.i("prvKeyPath",prvKeyPath);        Log.i("keyfilePath",keyfilePath);        Log.i("unencfilePath",unencfilePath);        Log.i("DECRYPT","********************************************DECRYPT&*******************");        try {            pkCipher = Cipher.getInstance("RSA");        } catch (NoSuchAlgorithmException e) {            // Todo auto-generated catch block            e.printstacktrace();        } catch (NoSuchpaddingException e) {            // Todo auto-generated catch block            e.printstacktrace();        }        try {            aesCipher = Cipher.getInstance("AES");        } catch (NoSuchAlgorithmException e) {            // Todo auto-generated catch block            e.printstacktrace();        } catch (NoSuchpaddingException e) {            // Todo auto-generated catch block            e.printstacktrace();        }        //DECRYPTION BEGIN        file pkf=new file(pubKeyPath);        byte[] encodedKey = new byte[(int) pkf.length()];        try {            new fileinputStream(pkf).read(encodedKey);            // create public key            X509EncodedKeySpec publicKeySpec = new X509EncodedKeySpec(encodedKey);            KeyFactory kf = KeyFactory.getInstance("RSA");            PublicKey pk = kf.generatePublic(publicKeySpec);            // write AES key            pkCipher.init(Cipher.ENCRYPT_MODE,pk);        } catch (fileNotFoundException e1) {            // Todo auto-generated catch block            e1.printstacktrace();        } catch (IOException e1) {            // Todo auto-generated catch block            e1.printstacktrace();        } catch (NoSuchAlgorithmException e) {            // Todo auto-generated catch block            e.printstacktrace();        } catch (InvalIDKeyException e) {            // Todo auto-generated catch block            e.printstacktrace();        } catch (InvalIDKeySpecException e) {            // Todo auto-generated catch block            e.printstacktrace();        }        try {            loadKey(new file(keyfilePath),new file(prvKeyPath));        } catch (GeneralSecurityException e) {            // Todo auto-generated catch block            e.printstacktrace();        } catch (IOException e) {            // Todo auto-generated catch block            e.printstacktrace();        }        try {            decrypt(new file(encfilePath),new file(unencfilePath));        }  catch (IOException e) {            // Todo auto-generated catch block            e.printstacktrace();        }        //DECRYPTION END    }    /**     * Decrypts an AES key from a file using an RSA private key     */    public voID loadKey(file in,file privateKeyfile)            throws GeneralSecurityException,IOException {        // read private key to be used to decrypt the AES key        byte[] encodedKey = new byte[(int) privateKeyfile.length()];        new fileinputStream(privateKeyfile).read(encodedKey);        // create private key        PKCS8EncodedKeySpec privateKeySpec = new PKCS8EncodedKeySpec(encodedKey);        KeyFactory kf = KeyFactory.getInstance("RSA");        PrivateKey pk = kf.generatePrivate(privateKeySpec);        // read AES key        pkCipher.init(Cipher.DECRYPT_MODE,pk);        aesKey = new byte[AES_Key_Size / 8];        CipherinputStream is = new CipherinputStream(new fileinputStream(in),pkCipher);        is.read(aesKey);        aeskeySpec = new SecretKeySpec(aesKey,"AES");    }    /**     * Decrypts and then copIEs the contents of a given file.     */    public voID decrypt(file in,file out) throws IOException         {        try {            aesCipher.init(Cipher.DECRYPT_MODE,aeskeySpec);        } catch (InvalIDKeyException e) {            Log.i("EXCEPTION","INVALID KEY EXCEPTION");            e.printstacktrace();        }        CipherinputStream is = new CipherinputStream(new fileinputStream(in),aesCipher);        fileOutputStream os = new fileOutputStream(out);        copy(is,os);        is.close();        os.close();    }    /**     * copIEs a stream.     */    private voID copy(inputStream is,OutputStream os) throws IOException {        int i;        byte[] b = new byte[2048];        while ((i = is.read(b)) != -1) {            os.write(b,i);        }    }}

最佳答案我们也遇到了同样的问题,它只在androID端(使用androID SDK)进行加密,然后在设备上解密时才解决.没有找到其他正确的理由来解决这个问题. 总结

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