不使用bouncycastle将PrivateKey转换为pem字符串

时间:2014-05-25 05:08:04

标签: openssl bouncycastle pem

我正在尝试将PrivateKey对象转换为pem格式字符串而不使用bouncycastle。 以前我这样做是这样的:

    StringWriter str = new StringWriter();
    PEMWriter pemWriter = new PEMWriter(str);
    pemWriter.writeObject(privKey);
    pemWriter.close();
    str.close();        
    return str.toString().getBytes();

现在我不想使用bouncycastle。如果我使用

    String code = "-----BEGIN RSA PRIVATE KEY-----\n";          
    String codenew =Base64.encodeBase64String(privKey.getEncoded());
    String myOutput = ""; 
    for (String substring : Splitter.fixedLength(64).split(codenew)) { 
      myOutput += substring + "\n"; 
    }
    code += myOutput.substring(0, myOutput.length() - 1);
    code += "\n-----END RSA PRIVATE KEY-----";                          
    return code.getBytes();

上面的代码可以工作,我可以通过传递这个byte []来使用openssl解密。 现在,我的问题是,如果我打印上述两段代码的pem字符串值,它们就不同了。 如果我使用下面的openssl命令

$ openssl pkcs12 -in receiver.p12 -out receiver.pem -nodes

生成的pem字符串与PEMWriter的pem字符串相同,但不是另一个字符串。我想知道我可以稍微修改我的代码,以便打印时的字符串匹配openssl命令或PEMWriter生成的字符串。

由openssl / PEMWriter生成的pem:

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

不使用BC时生成的pem:

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

1 个答案:

答案 0 :(得分:8)

BouncyCastle的PEMWriter类以PKCS#1格式存储私钥(有关详细信息,请参阅RFC 3447中定义的RsaPrivateKey结构):

pkcs1

您的代码以PKCS#8格式存储私钥(有关详细信息,请参阅RFC 5208中定义的PrivateKeyInfo结构):

pkcs8

PKCS#1定义了如何存储RSA密钥,而PKCS#8定义了一个可以存储任何非对称密钥对的信封。正如您在附图中看到的那样,PKCS#8只包含PKCS#1并指定该密钥可用于RSA算法。