小编ale*_*mov的帖子

我已经生成了一个私钥:

openssl genrsa [-out file] –des3

在此之后,我生成了一个公钥:

openssl rsa –pubout -in private.key [-out file]

我想用我的私钥签署一些消息,并使用我的公钥验证其他一些消息,使用如下代码:

public String sign(String message) throws SignatureException{
    try {
        Signature sign = Signature.getInstance("SHA1withRSA");
        sign.initSign(privateKey);
        sign.update(message.getBytes("UTF-8"));
        return new String(Base64.encodeBase64(sign.sign()),"UTF-8");
    } catch (Exception ex) {
        throw new SignatureException(ex);
    }
}

public boolean verify(String message, String signature) throws SignatureException{
    try {
        Signature sign = Signature.getInstance("SHA1withRSA");
        sign.initVerify(publicKey);
        sign.update(message.getBytes("UTF-8"));
        return sign.verify(Base64.decodeBase64(signature.getBytes("UTF-8")));
    } catch (Exception ex) {
        throw new SignatureException(ex);
    }
}

我找到了将我的私钥转换为PKCS8格式并加载它的解决方案.它适用于这样的一些代码:

public PrivateKey getPrivateKey(String filename) throws Exception {

    File f …