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| final SSLContext sslContext1 = sslContext; | ||
| try { | ||
| sslContext1.init(keyManagers, trustManagers, secureRandom); | ||
| sslContext.init(keyManagers, trustManagers, secureRandom); |
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Code scanning / CodeQL
`TrustManager` that accepts all certificates
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AI over 1 year ago
To fix the problem, we need to replace the NullTrustManager with a TrustManager that only trusts specific self-signed certificates. This involves creating a KeyStore containing the trusted certificates and initializing the TrustManagerFactory with this KeyStore. This way, only the specified certificates will be trusted, and the risk of a machine-in-the-middle attack is mitigated.
- Load the self-signed certificate into a
KeyStore. - Initialize a
TrustManagerFactorywith theKeyStore. - Use the
TrustManagerFactoryto get theTrustManagerarray. - Initialize the
SSLContextwith theTrustManagerarray.
Suggested changeset
1
src/main/java/com/github/kaklakariada/fritzbox/http/TrustSelfSignedCertificates.java
| @@ -22,2 +22,7 @@ | ||
| import javax.net.ssl.*; | ||
| import java.io.FileInputStream; | ||
| import java.io.InputStream; | ||
| import java.security.KeyStore; | ||
| import java.security.cert.CertificateFactory; | ||
| import java.security.cert.X509Certificate; | ||
|
|
||
| @@ -42,3 +47,3 @@ | ||
| final KeyManager[] keyManagers = null; | ||
| final TrustManager[] trustManagers = new TrustManager[] { new NullTrustManager() }; | ||
| final TrustManager[] trustManagers = getTrustManagers(); | ||
| final SecureRandom secureRandom = new SecureRandom(); | ||
| @@ -57,2 +62,23 @@ | ||
| } | ||
| } | ||
| private static TrustManager[] getTrustManagers() { | ||
| try { | ||
| // Load the self-signed certificate | ||
| File certificateFile = new File("path/to/self-signed-certificate"); | ||
| KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType()); | ||
| keyStore.load(null, null); | ||
| X509Certificate generatedCertificate; | ||
| try (InputStream cert = new FileInputStream(certificateFile)) { | ||
| generatedCertificate = (X509Certificate) CertificateFactory.getInstance("X509") | ||
| .generateCertificate(cert); | ||
| } | ||
| keyStore.setCertificateEntry(certificateFile.getName(), generatedCertificate); | ||
|
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||
| // Initialize TrustManagerFactory with the KeyStore | ||
| TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm()); | ||
| tmf.init(keyStore); | ||
| return tmf.getTrustManagers(); | ||
| } catch (Exception e) { | ||
| throw new HttpException("Error initializing trust managers", e); | ||
| } | ||
| } |
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Contributed by Manfred