feat(lsp): respect IDE user proxy settings / forward trust store

plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/lsp/AmazonQLspService.kt

@@ -21,6 +21,8 @@
 import com.intellij.openapi.util.SystemInfo
 import com.intellij.util.animation.consumer
 import com.intellij.util.io.await
+import com.intellij.util.net.HttpConfigurable
+import com.intellij.util.net.JdkProxyProvider
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Deferred
 import kotlinx.coroutines.async
@@ -29,6 +31,7 @@
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
 import kotlinx.coroutines.withTimeout
+import org.apache.http.client.utils.URIBuilder
 import org.eclipse.lsp4j.ClientCapabilities
 import org.eclipse.lsp4j.ClientInfo
 import org.eclipse.lsp4j.DidChangeConfigurationParams
@@ -48,6 +51,7 @@
 import software.aws.toolkits.core.utils.getLogger
 import software.aws.toolkits.core.utils.info
 import software.aws.toolkits.core.utils.warn
+import software.aws.toolkits.core.utils.writeText
 import software.aws.toolkits.jetbrains.isDeveloperMode
 import software.aws.toolkits.jetbrains.services.amazonq.lsp.artifacts.ArtifactManager
 import software.aws.toolkits.jetbrains.services.amazonq.lsp.auth.DefaultAuthCredentialsService
@@ -60,6 +64,7 @@
 import software.aws.toolkits.jetbrains.services.amazonq.lsp.textdocument.TextDocumentServiceHandler
 import software.aws.toolkits.jetbrains.services.amazonq.lsp.util.WorkspaceFolderUtil.createWorkspaceFolders
 import software.aws.toolkits.jetbrains.services.amazonq.lsp.workspace.WorkspaceServiceHandler
+import software.aws.toolkits.jetbrains.services.amazonq.profile.QDefaultServiceConfig
 import software.aws.toolkits.jetbrains.services.telemetry.ClientMetadata
 import software.aws.toolkits.jetbrains.settings.LspSettings
 import java.io.IOException
@@ -68,7 +73,10 @@
 import java.io.PipedOutputStream
 import java.io.PrintWriter
 import java.io.StringWriter
+import java.net.Proxy
+import java.net.URI
 import java.nio.charset.StandardCharsets
+import java.nio.file.Files
 import java.util.Collections
 import java.util.concurrent.Future
 import kotlin.time.Duration.Companion.seconds
@@ -263,13 +271,49 @@
     init {
         // will cause slow service init, but maybe fine for now. will not block UI since fetch/extract will be under background progress
         val artifact = runBlocking { service<ArtifactManager>().fetchArtifact(project) }.toAbsolutePath()
+
+        // more network calls
+        // make assumption that all requests will resolve to the same CA
+        // also terrible assumption that default endpoint is reachable
+        val qUri = URI(QDefaultServiceConfig.ENDPOINT)
+        val rtsTrustChain = TrustChainUtil.getTrustChain(qUri)
+        val extraCaCerts = Files.createTempFile("q-extra-ca", ".pem").apply {
+            writeText(
+                TrustChainUtil.certsToPem(rtsTrustChain)
+            )
+        }
+
         val node = if (SystemInfo.isWindows) "node.exe" else "node"
         val cmd = GeneralCommandLine(
             artifact.resolve(node).toString(),
             LspSettings.getInstance().getArtifactPath() ?: artifact.resolve("aws-lsp-codewhisperer.js").toString(),
             "--stdio",
             "--set-credentials-encryption-key",
+        ).withEnvironment(
+            buildMap {
+                put("NODE_EXTRA_CA_CERTS", extraCaCerts.toAbsolutePath().toString())
+
+                val proxy = JdkProxyProvider.getInstance().proxySelector.select(qUri)
+                    // log if only socks proxy available
+                    .firstOrNull { it.type() == Proxy.Type.HTTP }
+
+                if (proxy != null) {
+                    val address = proxy.address()
+                    if (address is java.net.InetSocketAddress) {
+                        put(
+                            "HTTPS_PROXY",
+                            URIBuilder("http://${address.hostName}:${address.port}").apply {
+                                val login = HttpConfigurable.getInstance().proxyLogin
+                                if (login != null) {
+                                    setUserInfo(login, HttpConfigurable.getInstance().plainProxyPassword)
+                                }
+                            }.build().toASCIIString()
+                        )
+                    }
+                }
+            }
         )
+            .withParentEnvironmentType(GeneralCommandLine.ParentEnvironmentType.CONSOLE)
 
         launcherHandler = KillableColoredProcessHandler.Silent(cmd)
         val inputWrapper = LSPProcessListener()

plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/lsp/TrustChainUtil.kt

@@ -0,0 +1,144 @@
+// Copyright 2025 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+package software.aws.toolkits.jetbrains.services.amazonq.lsp
+
+import com.intellij.util.io.DigestUtil
+import com.intellij.util.net.JdkProxyProvider
+import com.intellij.util.net.ssl.CertificateManager
+import org.apache.http.client.methods.RequestBuilder
+import org.apache.http.conn.ssl.DefaultHostnameVerifier
+import org.apache.http.impl.client.HttpClientBuilder
+import org.apache.http.impl.client.SystemDefaultCredentialsProvider
+import org.apache.http.impl.conn.SystemDefaultRoutePlanner
+import org.jetbrains.annotations.TestOnly
+import software.aws.toolkits.core.utils.getLogger
+import software.aws.toolkits.core.utils.warn
+import java.net.URI
+import java.security.KeyStore
+import java.security.cert.CertPathBuilder
+import java.security.cert.CertStore
+import java.security.cert.Certificate
+import java.security.cert.CollectionCertStoreParameters
+import java.security.cert.PKIXBuilderParameters
+import java.security.cert.PKIXCertPathBuilderResult
+import java.security.cert.X509CertSelector
+import java.security.cert.X509Certificate
+import java.util.Base64
+import kotlin.collections.ifEmpty
+
+object TrustChainUtil {
+    private val LOG = getLogger<TrustChainUtil>()
+
+    @TestOnly
+    fun resolveTrustChain(certs: Collection<X509Certificate>, trustAnchors: Collection<X509Certificate>) = resolveTrustChain(
+        certs,
+        keystoreFromCertificates(trustAnchors)
+    )
+
+    /**
+     * Build and validate the complete certificate chain
+     * @param certs The end-entity certificate
+     * @param trustAnchors The truststore containing trusted CA certificates
+     * @return The complete certificate chain
+     */
+    fun resolveTrustChain(certs: Collection<X509Certificate>, trustAnchors: KeyStore): List<X509Certificate> {
+        try {
+            // Create the selector for the certificate
+            val selector = X509CertSelector()
+            selector.certificate = certs.first()
+
+            // Create the parameters for path validation
+            val pkixParams = PKIXBuilderParameters(trustAnchors, selector)
+
+            // Disable CRL checking since we just want to build the path
+            pkixParams.isRevocationEnabled = false
+
+            // Create a CertStore containing the certificate we want to validate
+            val ccsp = CollectionCertStoreParameters(certs)
+            val certStore = CertStore.getInstance("Collection", ccsp)
+            pkixParams.addCertStore(certStore)
+
+            // Get the certification path
+            val builder = CertPathBuilder.getInstance("PKIX")
+            val result = builder.build(pkixParams) as PKIXCertPathBuilderResult
+            val certPath = result.certPath
+            val chain = (certPath.certificates as List<X509Certificate>).toMutableList()
+
+            // Add the trust anchor (root CA) to complete the chain
+            val trustAnchorCert = result.trustAnchor.trustedCert
+            if (trustAnchorCert != null) {
+                chain.add(trustAnchorCert)
+            }
+
+            return chain
+        } catch (e: Exception) {
+            // Java PKIX is happy with leaf cert in certification path, but Node.JS will not respect in NODE_CA_CERTS
+            LOG.warn(e) { "Could not build trust anchor via CertPathBuilder? maybe user accepted leaf cert but not intermediate" }
+
+            return emptyList()
+        }
+    }
+
+    fun getTrustChain(uri: URI): List<X509Certificate> {
+        val proxyProvider = JdkProxyProvider.getInstance()
+        var peerCerts: Array<Certificate> = emptyArray()
+        val verifierDelegate = DefaultHostnameVerifier()
+        val client = HttpClientBuilder.create()
+            .setRoutePlanner(SystemDefaultRoutePlanner(proxyProvider.proxySelector))
+            .setDefaultCredentialsProvider(SystemDefaultCredentialsProvider())
+            .setSSLHostnameVerifier { hostname, sslSession ->
+                peerCerts = sslSession.peerCertificates
+
+                verifierDelegate.verify(hostname, sslSession)
+            }
+            // prompt user via modal to accept certificate if needed; otherwise need to prompt separately prior to launching flare
+            .setSSLContext(CertificateManager.getInstance().sslContext)
+
+        // client request will fail if user did not accept cert
+        client.build().use { it.execute(RequestBuilder.options(uri).build()) }
+
+        val certificates = peerCerts as Array<X509Certificate>
+
+        // java default + custom system
+        // excluding leaf cert for case where user has both leaf and issuing CA as trusted roots
+        val allAccepted = CertificateManager.getInstance().trustManager.acceptedIssuers.toSet() - certificates.first()
+        val ks = keystoreFromCertificates(allAccepted)
+
+        // if this throws then there is a bug because it passed PKIX validation in apache client
+        val trustChain = try {
+            resolveTrustChain(certificates.toList(), ks)
+        } catch (e: Exception) {
+            // Java PKIX is happy with leaf cert in certification path, but Node.JS will not respect in NODE_CA_CERTS
+            LOG.warn(e) { "Passed Apache PKIX verification but could not build trust anchor via CertPathBuilder? maybe user accepted leaf cert but not root" }
+            emptyList()
+        }
+
+        // if trust chain is empty, then somehow user only trusts the leaf cert???
+        return trustChain.ifEmpty {
+            // so return the served certificate chain from the server and hope that works
+            certificates.toList()
+        }
+    }
+
+    fun certsToPem(certs: List<X509Certificate>): String =
+        buildList {
+            certs.forEach {
+                add("-----BEGIN CERTIFICATE-----")
+                add(Base64.getMimeEncoder(64, System.lineSeparator().toByteArray()).encodeToString(it.encoded))
+                add("-----END CERTIFICATE-----")
+            }
+        }.joinToString(separator = System.lineSeparator())
+
+    private fun keystoreFromCertificates(certificates: Collection<X509Certificate>): KeyStore {
+        val ks = KeyStore.getInstance(KeyStore.getDefaultType())
+        ks.load(null, null)
+        certificates.forEachIndexed { index, cert ->
+            ks.setCertificateEntry(
+                cert.subjectX500Principal.toString() + "-" + DigestUtil.sha256Hex(cert.encoded),
+                cert
+            )
+        }
+        return ks
+    }
+}