fix: do not set legacy proxy from maven or env (#7072)

The Apache HTTPClient based downloader supports http(s).proxy*
properties, so we do not need to use legacy logic. In legeacy mode
http.nonProxyHosts is not honored, so setting both leads to issues due
to missing proxy selectors.

Omit populating legacy properties resolves this issue. In addition we
have to move the password decryption from Maven settings up, so it
actually works.

Signed-off-by: Stefan Kalscheuer <stefan@stklcode.de>

maven/src/main/java/org/owasp/dependencycheck/maven/BaseDependencyCheckMojo.java

@@ -2212,46 +2212,17 @@ protected void populateSettings() {
                 if (mavenProxy.getUsername() != null && !mavenProxy.getUsername().isEmpty()) {
                     System.setProperty("https.proxyUser", mavenProxy.getUsername());
                 }
-                if (mavenProxy.getPassword() != null && !mavenProxy.getPassword().isEmpty()) {
-                    System.setProperty("https.proxyPassword", mavenProxy.getPassword());
-                }
-                if (mavenProxy.getNonProxyHosts() != null && !mavenProxy.getNonProxyHosts().isEmpty()) {
-                    System.setProperty("http.nonProxyHosts", mavenProxy.getNonProxyHosts());
-                }
-            }
+                String password = mavenProxy.getPassword();
+                if (password != null && !password.isEmpty()) {
+                    try {
+                        password = decryptPasswordFromSettings(password);
+                    } catch (SecDispatcherException ex) {
+                        password = handleSecDispatcherException("proxy", mavenProxy.getId(), password, ex);
+                    }
 
-            settings.setString(Settings.KEYS.PROXY_SERVER, mavenProxy.getHost());
-            settings.setString(Settings.KEYS.PROXY_PORT, Integer.toString(mavenProxy.getPort()));
-            final String userName = mavenProxy.getUsername();
-            String password = mavenProxy.getPassword();
-            if (password != null && !password.isEmpty()) {
-                if (settings.getBoolean(Settings.KEYS.PROXY_DISABLE_SCHEMAS, true)) {
-                    System.setProperty("jdk.http.auth.tunneling.disabledSchemes", "");
-                }
-                try {
-                    password = decryptPasswordFromSettings(password);
-                } catch (SecDispatcherException ex) {
-                    password = handleSecDispatcherException("proxy", mavenProxy.getId(), password, ex);
+                    System.setProperty("https.proxyPassword", password);
                 }
             }
-            settings.setStringIfNotNull(Settings.KEYS.PROXY_USERNAME, userName);
-            settings.setStringIfNotNull(Settings.KEYS.PROXY_PASSWORD, password);
-            settings.setStringIfNotNull(Settings.KEYS.PROXY_NON_PROXY_HOSTS, mavenProxy.getNonProxyHosts());
-        } else if (System.getProperty("http.proxyHost") != null) {
-            //else use standard Java system properties
-            settings.setString(Settings.KEYS.PROXY_SERVER, System.getProperty("http.proxyHost", ""));
-            if (System.getProperty("http.proxyPort") != null) {
-                settings.setString(Settings.KEYS.PROXY_PORT, System.getProperty("http.proxyPort"));
-            }
-            if (System.getProperty("http.proxyUser") != null) {
-                settings.setString(Settings.KEYS.PROXY_USERNAME, System.getProperty("http.proxyUser"));
-            }
-            if (System.getProperty("http.proxyPassword") != null) {
-                settings.setString(Settings.KEYS.PROXY_PASSWORD, System.getProperty("http.proxyPassword"));
-            }
-            if (System.getProperty("http.nonProxyHosts") != null) {
-                settings.setString(Settings.KEYS.PROXY_NON_PROXY_HOSTS, System.getProperty("http.nonProxyHosts"));
-            }
         } else if (this.proxy != null && this.proxy.getHost() != null) {
             // or use configured <proxy>
             settings.setString(Settings.KEYS.PROXY_SERVER, this.proxy.getHost());