Android(安卓)RSA 公钥加密遇到坑

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public class RSAUtil {    public static final String KEY_ALGORITHM = "RSA/None/PKCS1Padding";    /**     * 使用模和指数生成RSA公钥     * 注意：【此代码用了默认补位方式，为RSA/None/PKCS1Padding，不同JDK默认的补位方式可能不同，如Android默认是RSA     * /None/NoPadding】     *     * @param modulus  模     * @param exponent 指数     * @return     */    public static RSAPublicKey getPublicKey(String modulus, String exponent) {        try {            BigInteger b1 = new BigInteger(modulus, 16);            BigInteger b2 = new BigInteger(exponent, 16);            KeyFactory keyFactory = KeyFactory.getInstance("RSA");            RSAPublicKeySpec keySpec = new RSAPublicKeySpec(b1, b2);            return (RSAPublicKey) keyFactory.generatePublic(keySpec);        } catch (Exception e) {            e.printStackTrace();            return null;        }    }    /**     * 公钥加密     */    public static byte[] encrypt(byte[] content, PublicKey publicKey) {        try {            Cipher cipher = Cipher.getInstance(KEY_ALGORITHM);            cipher.init(Cipher.ENCRYPT_MODE, publicKey);            return cipher.doFinal(content);        } catch (Exception e) {            e.printStackTrace();        }        return null;    }}

Android 用这个方法生成公私钥对

KeyFactory keyFactory = KeyFactory.getInstance("RSA");

Android RSA加解密的时候用

Cipher cipher = Cipher.getInstance("RSA/None/PKCS1Padding");

转载于:https://my.oschina.net/547217475/blog/3028495

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