从Java BouncyCastle输出加密的PK8私钥

Question

java.security.Security.addProvider(org.bouncycastle.jce.provider.BouncyCastleProvider());
keyGen = java.security.KeyPairGenerator.getInstance('RSA', 'BC');
keyGen.initialize(2048,  java.security.SecureRandom());
keypair = keyGen.generateKeyPair();
privateKey = keypair.getPrivate();

m=org.bouncycastle.openssl.PKCS8Generator.PBE_SHA1_3DES;
encryptorBuilder = org.bouncycastle.openssl.jcajce.JceOpenSSLPKCS8EncryptorBuilder(m);
encryptorBuilder.setRandom(java.security.SecureRandom());
encryptorBuilder.setPasssword(password);
oe = encryptorBuilder.build();
gen = org.bouncycastle.openssl.jcajce.JcaPKCS8Generator(privateKey,oe);
privKeyObj = gen.generate();
fos = java.io.FileWriter('private.pem');
pem = org.bouncycastle.openssl.jcajce.JcaPEMWriter(fos);
pem.writeObject(privKeyObj);
pem.flush();
fos.close();

textWriter = java.io.StringWriter();
pem = org.bouncycastle.openssl.jcajce.JcaPEMWriter(textWriter);
pem.writeObject(privateKey);
pem.flush();
thekey = char(textWriter.toString());
cmd = ['echo "' thekey '"|openssl pkcs8 -topk8 -out private.pk8 -inform PEM -outform DER -passout pass:' password];
system(cmd);

$openssl pkcs8 -inform DER -outform PEM -in private.pk8 -out private.pem
Error decrypting key
140735211835472:error:0D0680A8:asn1 encoding routines:ASN1_CHECK_TLEN:wrong tag:tasn_dec.c:1201:
140735211835472:error:0D06C03A:asn1 encoding routines:ASN1_D2I_EX_PRIMITIVE:nested asn1 error:tasn_dec.c:765:
140735211835472:error:0D08303A:asn1 encoding routines:ASN1_TEMPLATE_NOEXP_D2I:nested asn1 error:tasn_dec.c:697:Field=version, Type=PKCS8_PRIV_KEY_INFO

这段代码的目的是在最终用户的机器上生成一个CSR，然后我对它进行签名，并用机器的MAC地址（和salt）对它进行加密，这样程序就只能在授权的机器上运行，而且只有授权的机器才能访问我的PostgreSql数据库。

建议？

Answer 1

我想出来了。在我的原始代码中，我使用了BCPKCS12PbeOutputenCryptorBuilder。错了！正确的调用是jcepkcspbeoutputenCryptorBuilder。正确的代码（在MATLAB中，但转换成Java很简单）是：

    java.security.Security.addProvider(org.bouncycastle.jce.provider.BouncyCastleProvider());
    keyGen = java.security.KeyPairGenerator.getInstance('RSA', 'BC');
    keyGen.initialize(2048,  java.security.SecureRandom());
    keypair = keyGen.generateKeyPair();
    privateKey = keypair.getPrivate();
    builder=org.bouncycastle.pkcs.jcajce.JcaPKCS8EncryptedPrivateKeyInfoBuilder(privateKey);

    m=org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers.pbeWithSHAAnd3_KeyTripleDES_CBC;
    encryptorBuilder = org.bouncycastle.pkcs.jcajce.JcePKCSPBEOutputEncryptorBuilder(m);
    password = 'test';
    outputBuilder = encryptorBuilder.build(password);
    privKeyObj = builder.build(outputBuilder);
    fos = java.io.FileOutputStream('testkey.pk8');
    fos.write(privKeyObj.getEncoded());
    fos.flush();
    fos.close();

这将生成一个DER格式化的PCS#8文件。

    openssl pkcs8 -inform DER -outform PEM -in testkey.pk8 -out testkey.pem

现在返回PEM私钥。读取密钥：

    myPath = java.nio.file.Paths.get(pwd,'testkey.pk8');
    encodedKey = java.nio.file.Files.readAllBytes(myPath);
    privKeyObj =org.bouncycastle.pkcs.PKCS8EncryptedPrivateKeyInfo(encodedKey);
    cp=org.bouncycastle.openssl.jcajce.JcaPEMKeyConverter();
    cp.setProvider('BC');

    decryptorBuilder = org.bouncycastle.pkcs.jcajce.JcePKCSPBEInputDecryptorProviderBuilder();
    inputBuilder = decryptorBuilder.build(password);
    info = privKeyObj.decryptPrivateKeyInfo(inputBuilder);
    decodedKey=cp.getPrivateKey(info);