从crt文件创建p12和密钥库

Answer 1

您可以使用Java的keytool创建包含根CA的PKCS#12密钥存储库：

keytool -importcert -trustcacerts -keystore keystore.p12 -storetype pkcs12 \
  -alias root -file root.crt

系统将提示您输入一个密码，该密码将用于保护密钥存储的完整性，以便任何人都不能在未被检测到的情况下修改您的信任锚点。您可以使用另一个选项指定密码，但这很可能会在系统上留下密码的记录。

在这里，-trustcacerts表示您信任作为认证机构导入的证书。如果您漏掉了这个，证书就会显示出来，并且会提示您审核并接受它。

static void createTrustStore(Path certificate, Path keystore, char[] password)
        throws IOException, GeneralSecurityException {
    CertificateFactory cf = CertificateFactory.getInstance("X.509");
    Certificate root;
    try (InputStream is = Files.newInputStream(certificate)) {
        root = cf.generateCertificate(is);
    }
    KeyStore pkcs12 = KeyStore.getInstance("PKCS12");
    pkcs12.load(null, null);
    pkcs12.setCertificateEntry("root", root);
    try (OutputStream os = Files.newOutputStream(keystore, StandardOpenOption.CREATE_NEW)) {
        pkcs12.store(os, password);
    }
}

private static final byte[] HEADER = "-----".getBytes(StandardCharsets.US_ASCII);

static void createIdentityStore(Path certificate, Path key, Path keystore, char[] password)
        throws IOException, GeneralSecurityException {
    byte[] pkcs8 = decode(Files.readAllBytes(key));
    KeyFactory kf = KeyFactory.getInstance("RSA");
    PrivateKey pvt = kf.generatePrivate(new PKCS8EncodedKeySpec(pkcs8));
    CertificateFactory cf = CertificateFactory.getInstance("X.509");
    Certificate pub;
    try (InputStream is = Files.newInputStream(certificate)) {
        pub = cf.generateCertificate(is);
    }
    KeyStore pkcs12 = KeyStore.getInstance("PKCS12");
    pkcs12.load(null, null);
    pkcs12.setKeyEntry("identity", pvt, password, new Certificate[] { pub });
    try (OutputStream s = Files.newOutputStream(keystore, StandardOpenOption.CREATE_NEW)) {
        pkcs12.store(s, password);
    }
}

private static byte[] decode(byte[] raw) {
    if (!Arrays.equals(Arrays.copyOfRange(raw, 0, HEADER.length), HEADER)) return raw;
    CharBuffer pem = StandardCharsets.US_ASCII.decode(ByteBuffer.wrap(raw));
    String[] lines = Pattern.compile("\\R").split(pem);
    String[] body = Arrays.copyOfRange(lines, 1, lines.length - 1);
    return Base64.getDecoder().decode(String.join("", body));
}