如何在内存字符串中解析得到私钥和公钥RSA

Question

我可以直接从文件中读取公钥和私钥，因为文件流将其转换为PublicKey和PrivateKey对象。但如果以字符串形式加载，则失败。

工作代码

    public static RSAPrivateKey getPrivateKey(String filename) throws IOException, GeneralSecurityException {

            PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(
                    IOUtils.toByteArray(new FileInputStream(filename)));
            return (RSAPrivateKey) KeyFactory.getInstance("RSA").generatePrivate(pkcs8EncodedKeySpec);
        }

        public static RSAPublicKey getPublicKey(String filename) throws IOException, GeneralSecurityException {
            X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(
                    IOUtils.toByteArray(new FileInputStream(filename)));
            return (RSAPublicKey) KeyFactory.getInstance("RSA").generatePublic(x509EncodedKeySpec);
        }

public static void main(String[] args) throws JOSEException, ParseException, IOException, GeneralSecurityException {

        String publicKeyPathName = "../public";
        String privateKeyPathName = "../private";
        /// loading from file
         RSAPublicKey publicKey = new MYClass().getPublicKey(publicKeyPathName);
         RSAPrivateKey privateKey = new MYClass().getPrivateKey(privateKeyPathName);
}

public static RSAPrivateKey parsePrivateKey(String content) throws IOException, GeneralSecurityException {
        content = content.replaceAll("\\n", "").replace("-----BEGIN RSA PRIVATE KEY-----", "")
                .replace("-----END RSA PRIVATE KEY-----", "");
        PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(content.getBytes(StandardCharsets.UTF_8));
        return (RSAPrivateKey) KeyFactory.getInstance("RSA").generatePrivate(pkcs8EncodedKeySpec);
    }

    public static RSAPublicKey parsePublicKey(String content) throws IOException, GeneralSecurityException {
        content = content.replaceAll("\\n", "").replace("-----BEGIN PUBLIC KEY-----", "")
                .replace("-----END PUBLIC KEY-----", "");
        X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(content.getBytes(StandardCharsets.UTF_8));
        return (RSAPublicKey) KeyFactory.getInstance("RSA").generatePublic(x509EncodedKeySpec);
    }
public String getPublicKey() {
        return "-----BEGIN PUBLIC KEY-----\n" 
                + "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAswPxKZWJEQ0RVtiaoFIU"
                + "jndalEp2sZF87Cy9IxW1FxxcfDmZRlkMDe+5X1lzpOjFHP8mBZa8vhMjSKbJY2wt"
                + "MyxckbBoTjAIefi34KuD0Q6j9LRt1r1iQ+nMYezk5N83ruqyRHtB4a8AOkw3iE2z"
                + "zA74uAkCzPiYUrAES1I9mVbpxJZf2Ej0px6drkd4OQ2aPnwR13gWTnmqFWV+Xkl6"
                + "WapMArewaAUXU9zDqjn4ZpNCkgx6m4CK7PDt+VgYUi+sjI0WzPIb0FMDTYSe1iX6"
                + "mfIabvoetxUmtyQgu4RfHIiOF0no6VEPh31of2B+KZX2OjHKjyKBGUxUkDLm+J2J" 
                + "CwIDAQAB\n"
                + "-----END PUBLIC KEY-----";
    }

    public String getPrivateKey() {
        return "-----BEGIN RSA PRIVATE KEY-----\n"
                + "MIIEowIBAAKCAQEAswPxKZWJEQ0RVtiaoFIUjndalEp2sZF87Cy9IxW1FxxcfDmZ"
                + "RlkMDe+5X1lzpOjFHP8mBZa8vhMjSKbJY2wtMyxckbBoTjAIefi34KuD0Q6j9LRt"
+ "1r1iQ+nMYezk5N83ruqyRHtB4a8AOkw3iE2zzA74uAkCzPiYUrAES1I9mVbpxJZf"
+ "2Ej0px6drkd4OQ2aPnwR13gWTnmqFWV+Xkl6WapMArewaAUXU9zDqjn4ZpNCkgx6"
+ "m4CK7PDt+VgYUi+sjI0WzPIb0FMDTYSe1iX6mfIabvoetxUmtyQgu4RfHIiOF0no"
+ "6VEPh31of2B+KZX2OjHKjyKBGUxUkDLm+J2JCwIDAQABAoIBAFj59p4SoyQEeL/P"
+ "vVs+MNV24WCfektb4tmIiyGrIm0wPY/JGTPsAp/SrTKFRYOL5p04/G7+syVOYdU0"
+ "gRiXpgevXvtS0SU7nprxUoOq/EOmoTt5iraXPwY+aMWrd0GC6SxZnu2GzgIcd2KC"
+ "i3+GD323W0wtvmSekydWMWw2nkNeKCL8WE/GqLjigRzdGl+RVviGC+N3IsZZvcf0"
+ "toNXTxXBPgtcYYWV7MOLsFQkk1yvKh0ISncswkjmkRChi8KQ178hbIzeBuDq+jlY"
+ "11epFjNUpyw2Y3jRHHkVSFKFaE6GeBpHMC0ucBJxyRzw19DZ+iPGI2xZBmW+wEOE"
+ "+khw1WECgYEA6ETt3I9zszzytqh5jBma04EM08+aOw9+CVcCLWSC17vRBOiPGJTE"
+ "bHq6Ln7+pjIErSTrlXOH6kPV0nRzmSDncsttmNXLKCuJUR5stVl/gQY4uaGesF/x"
+ "Kk/orw/ddibukXiXHAkduZXC+3Wq4TaYHChUz/QZv/gamPSusi1zBlMCgYEAxU4k"
+ "gJyKLqKfAXsrX0ilyvwkP4siwzORS1GFU5WfMf0E3ZD/3FMjmhjOLX5vnnWcIFtN"
+ "ERungsyHF0AG5o23HTHkEIi2aZWnC2GiYfpEAJuLhkx08aO65o26RxeC7MOAgL1y"
+ "0wC/b8ceIQkQuYbqdrPBywHry7+/vtPbHOggK2kCgYBIv+Y8shXMKyfefFBtyEtN"
+ "Odt5sEmffA++/yiobRXqWmJyhiDj0xze2WXdUFuUVJBQZwL+8Yu9nXeojl7ytHKp"
+ "6vut5jDWqSQ+aygjeR/NmtRDmFKq7bIMzbCUvIRiEHmiyMGTv2s3CKhkuItINSBZ"
+ "mWxPIia6kQxLoj/hgQjJDwKBgGNTU0zrgSS4+RLlzo/JIq1tAVJ72KQr8ZjZESVi"
+ "zSF9HlXsCOIBeIq6shB09fvveQlQ7RsPsORH0joCIXcvIF+yHf201R+SFuXD4Nsy"
+ "AcnMhBC3rKd4pT4rWvsu+tn2EVq+BG/0kGrU8nXu+lxrbt0S4Rwxe2K2xPBr9oI2"
+ "2PsBAoGBAJHPPAire0lHcPi+J8YkVKuzwEfP7NgeLZdtqjiZBCZiLoP8SRm68FJS"
+ "2UpGX4K7rQhx66H6UwXHylBfush56Z8Y9g7PYel83sy+4bqjod1a5TqNBJMkhDQi"
+ "DrQmDIfpFoRYcOyB4+BeF/w7wL+R5ofov4T+0vB3ST+aztphp2G4\n"
+ "-----END RSA PRIVATE KEY-----";
    }

public static void main(String[] args) throws JOSEException, ParseException, IOException, GeneralSecurityException {

 String publicKeyString = new MyClass().getPublicKey();
         RSAPublicKey publicKey = new MyClass().parsePublicKey(publicKeyString);

         String privateKeyString = new MyClass().getPrivateKey();
         RSAPrivateKey privateKey = new
         MyClass().parsePrivateKey(privateKeyString);

}

线程“main”java.security.spec.invalidkeyspection:java.security.invalidkeyexception:sun.security.rsa.rsakeyfactory.engineGeneratePublic(rsakeyfactory.java:205)在j.myclass.parsePublickey(myclass.java:223)在java.security.rsa.rsakeyfactory.generatePublic(keyfactory.java:205)在在sun.security.rsa.rsapublickeyimpl.(rsapublickeyimpl.java:84).在sun.security.rsa.rsakeyfactory.generatePublic(rsakeyfactory.java:298).在sun.security.rsa.rsakeyfactory.engineGeneratePublic(rsakeyfactory.java:201).解码(x509key.java:403).还有3个

我的习惯是，

从数据库中读取一个键并进行转换。

Answer 1

您使用content.getBytes(StandardCharsets.utf_8)而不是base64来解码PEM页眉和页脚行中的文本（从-----)。