在 Java 中加载 RSA 私钥(algid 解析错误，不是序列) [英] Load a RSA private key in Java (algid parse error, not a sequence)

问题描述

我正在尝试将使用 ssl 生成的私有 RSA 密钥加载到 Java 中，我的代码是:

I'm trying to load a private RSA key generated with ssl into java, my code is:

生成密钥:

openssl genrsa -out mykey.pem 1024

结果:

-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----

加载:

String privKeyPEM=readFile("mykey.pem");
privKeyPEM= privKeyPEM.replace("-----BEGIN RSA PRIVATE KEY-----", "").replace("
", "");
// Remove the first and last lines
privKeyPEM = privKeyPEM.replace("-----END RSA PRIVATE KEY-----", "");
System.out.println(privKeyPEM);

// Base64 decode the data
byte [] encoded = Base64.decode(privKeyPEM);

// PKCS8 decode the encoded RSA private key
PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(encoded);
KeyFactory kf = KeyFactory.getInstance("RSA");
PrivateKey privKey = kf.generatePrivate(keySpec);

// Display the results
System.out.println(privKey);

并且它抛出一个 IOException : algid parse error, not a sequence.错误在哪里?

and it throws an IOException : algid parse error, not a sequence. Where is the error?

Exception in thread "main" java.security.spec.InvalidKeySpecException: java.security.InvalidKeyException: IOException : algid parse error, not a sequence
at sun.security.rsa.RSAKeyFactory.engineGeneratePrivate(Unknown Source)
at java.security.KeyFactory.generatePrivate(Unknown Source)
at base54.encrypt.RSAToy.main(RSAToy.java:36)
Caused by: java.security.InvalidKeyException: IOException : algid parse error, not a sequence
at sun.security.pkcs.PKCS8Key.decode(Unknown Source)
at sun.security.pkcs.PKCS8Key.decode(Unknown Source)
at sun.security.rsa.RSAPrivateCrtKeyImpl.<init>(Unknown Source)
at sun.security.rsa.RSAPrivateCrtKeyImpl.newKey(Unknown Source)
at sun.security.rsa.RSAKeyFactory.generatePrivate(Unknown Source)

推荐答案

如有必要，您仍然可以加载密钥，

You could still load the keys if necessary,

public static PublicKey bigIntegerToPublicKey(BigInteger e, BigInteger m)  {
    RSAPublicKeySpec keySpec = new RSAPublicKeySpec(m, e);
    KeyFactory fact = KeyFactory.getInstance("RSA");
    PublicKey pubKey = fact.generatePublic(keySpec);
    return pubKey;
}

public static PrivateKey bigIntegerToPrivateKey(BigInteger e, BigInteger m) {
    RSAPrivateKeySpec keySpec = new RSAPrivateKeySpec(m, e);
    KeyFactory fact = KeyFactory.getInstance("RSA");
    PrivateKey privKey = fact.generatePrivate(keySpec);
    return privKey;
}

你需要的只是模数和指数.

all you need is the modulus and the exponent.

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