Java 以编程方式将 .cer 证书导入密钥库
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programmatically import .cer certificate into keystore
提问by Pali
How can I import a .p12 certificate from the classpath into the java keystore? First I used the InstallCert https://code.google.com/p/java-use-examples/source/browse/trunk/src/com/aw/ad/util/InstallCert.javaand did some changes so the server certificate will be imported into the keystore in the java install directory. This works fine but now I want to load a certificate from my classpath.
如何将 .p12 证书从类路径导入 java 密钥库？首先，我使用了 InstallCert https://code.google.com/p/java-use-examples/source/browse/trunk/src/com/aw/ad/util/InstallCert.java并做了一些更改，因此服务器证书将被导入到 java 安装目录中的密钥库中。这工作正常，但现在我想从我的类路径加载证书。
EDIT: I just use a .cer certificate, see next answer
编辑：我只使用 .cer 证书，请参阅下一个答案
采纳答案by Pali
The answer:
答案：
InputStream certIn = ClassLoader.class.getResourceAsStream("/package/myCert.cer");
final char sep = File.separatorChar;
File dir = new File(System.getProperty("java.home") + sep + "lib" + sep + "security");
File file = new File(dir, "cacerts");
InputStream localCertIn = new FileInputStream(file);
KeyStore keystore = KeyStore.getInstance(KeyStore.getDefaultType());
keystore.load(localCertIn, passphrase);
if (keystore.containsAlias("myAlias")) {
certIn.close();
localCertIn.close();
return;
}
localCertIn.close();
BufferedInputStream bis = new BufferedInputStream(certIn);
CertificateFactory cf = CertificateFactory.getInstance("X.509");
while (bis.available() > 0) {
Certificate cert = cf.generateCertificate(bis);
keystore.setCertificateEntry("myAlias", cert);
}
certIn.close();
OutputStream out = new FileOutputStream(file);
keystore.store(out, passphrase);
out.close();
For Java Web Start dont use the ClassLoader, use the Class itselfe:
对于 Java Web Start，不要使用 ClassLoader，使用 Class 本身：
InputStream certIn = Certificates.class.getResourceAsStream("/package/myCert.cer");
回答by Feng Zhang
I run into "java.io.FileNotFoundException: C:\Program Files (x86)\Java\jre1.8.0_45\lib\security\cacerts (Access is denied)" issue as well. I have to go to the folder \securiyy and grant permission manually to access h
我也遇到了“java.io.FileNotFoundException: C:\Program Files (x86)\Java\jre1.8.0_45\lib\security\cacerts（访问被拒绝）”问题。我必须转到文件夹 \securiyy 并手动授予权限以访问 h
