Add SSLConfig object to IceServer.

This is a rollforward of https://webrtc-review.googlesource.com/c/src/+/96020,
with the addition of setting the old tlsCertPolicy, tlsAlpnProtocols and
tlsEllipticCurves in the RTCIceServer initializer, for backwards compatibility.

Bug: webrtc:9662
Change-Id: I28706ed4ff5abe3f7f913f105779f0e5412aeac5
Reviewed-on: https://webrtc-review.googlesource.com/98762
Commit-Queue: Diogo Real <diogor@google.com>
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Reviewed-by: Kári Helgason <kthelgason@webrtc.org>
Reviewed-by: Steve Anton <steveanton@webrtc.org>
Reviewed-by: Qingsi Wang <qingsi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24696}
diff --git a/sdk/android/api/org/webrtc/PeerConnection.java b/sdk/android/api/org/webrtc/PeerConnection.java
index 2f9adcf..2161711 100644
--- a/sdk/android/api/org/webrtc/PeerConnection.java
+++ b/sdk/android/api/org/webrtc/PeerConnection.java
@@ -50,6 +50,7 @@
     }
   }
 
+  // TODO(diogor, webrtc:9673): Remove TlsCertPolicy. It's deprecated, in favor of SslConfig.
   /** Tracks PeerConnectionInterface::TlsCertPolicy */
   public enum TlsCertPolicy {
     TLS_CERT_POLICY_SECURE,
@@ -126,7 +127,9 @@
     public final List<String> urls;
     public final String username;
     public final String password;
-    public final TlsCertPolicy tlsCertPolicy;
+    // TODO(diogor, webrtc:9673): Remove tlsCertPolicy from this API.
+    // This field will be ignored if tlsCertPolicy is also set in SslConfig.
+    @Deprecated public final TlsCertPolicy tlsCertPolicy;
 
     // If the URIs in |urls| only contain IP addresses, this field can be used
     // to indicate the hostname, which may be necessary for TLS (using the SNI
@@ -134,12 +137,18 @@
     // necessary.
     public final String hostname;
 
+    // TODO(diogor, webrtc:9673): Remove tlsAlpnProtocols from this API.
     // List of protocols to be used in the TLS ALPN extension.
-    public final List<String> tlsAlpnProtocols;
+    @Deprecated public final List<String> tlsAlpnProtocols;
 
+    // TODO(diogor, webrtc:9673): Remove tlsEllipticCurves from this API.
     // List of elliptic curves to be used in the TLS elliptic curves extension.
     // Only curve names supported by OpenSSL should be used (eg. "P-256","X25519").
-    public final List<String> tlsEllipticCurves;
+    // This field will be ignored if tlsEllipticCurves is also set in SslConfig.
+    @Deprecated public final List<String> tlsEllipticCurves;
+
+    // SSL configuration options for any SSL/TLS connections to this IceServer.
+    public final SslConfig sslConfig;
 
     /** Convenience constructor for STUN servers. */
     @Deprecated
@@ -161,12 +170,12 @@
     public IceServer(String uri, String username, String password, TlsCertPolicy tlsCertPolicy,
         String hostname) {
       this(uri, Collections.singletonList(uri), username, password, tlsCertPolicy, hostname, null,
-          null);
+          null, SslConfig.builder().createSslConfig());
     }
 
     private IceServer(String uri, List<String> urls, String username, String password,
         TlsCertPolicy tlsCertPolicy, String hostname, List<String> tlsAlpnProtocols,
-        List<String> tlsEllipticCurves) {
+        List<String> tlsEllipticCurves, SslConfig sslConfig) {
       if (uri == null || urls == null || urls.isEmpty()) {
         throw new IllegalArgumentException("uri == null || urls == null || urls.isEmpty()");
       }
@@ -192,12 +201,13 @@
       this.hostname = hostname;
       this.tlsAlpnProtocols = tlsAlpnProtocols;
       this.tlsEllipticCurves = tlsEllipticCurves;
+      this.sslConfig = sslConfig;
     }
 
     @Override
     public String toString() {
       return urls + " [" + username + ":" + password + "] [" + tlsCertPolicy + "] [" + hostname
-          + "] [" + tlsAlpnProtocols + "] [" + tlsEllipticCurves + "]";
+          + "] [" + tlsAlpnProtocols + "] [" + tlsEllipticCurves + "] [" + sslConfig + "]";
     }
 
     public static Builder builder(String uri) {
@@ -216,6 +226,7 @@
       private String hostname = "";
       private List<String> tlsAlpnProtocols;
       private List<String> tlsEllipticCurves;
+      private SslConfig sslConfig = SslConfig.builder().createSslConfig();
 
       private Builder(List<String> urls) {
         if (urls == null || urls.isEmpty()) {
@@ -234,6 +245,7 @@
         return this;
       }
 
+      @Deprecated
       public Builder setTlsCertPolicy(TlsCertPolicy tlsCertPolicy) {
         this.tlsCertPolicy = tlsCertPolicy;
         return this;
@@ -244,19 +256,26 @@
         return this;
       }
 
+      @Deprecated
       public Builder setTlsAlpnProtocols(List<String> tlsAlpnProtocols) {
         this.tlsAlpnProtocols = tlsAlpnProtocols;
         return this;
       }
 
+      @Deprecated
       public Builder setTlsEllipticCurves(List<String> tlsEllipticCurves) {
         this.tlsEllipticCurves = tlsEllipticCurves;
         return this;
       }
 
+      public Builder setSslConfig(SslConfig sslConfig) {
+        this.sslConfig = sslConfig;
+        return this;
+      }
+
       public IceServer createIceServer() {
         return new IceServer(urls.get(0), urls, username, password, tlsCertPolicy, hostname,
-            tlsAlpnProtocols, tlsEllipticCurves);
+            tlsAlpnProtocols, tlsEllipticCurves, sslConfig);
       }
     }
 
@@ -298,6 +317,11 @@
     List<String> getTlsEllipticCurves() {
       return tlsEllipticCurves;
     }
+
+    @CalledByNative("IceServer")
+    SslConfig getSslConfig() {
+      return sslConfig;
+    }
   }
 
   /** Java version of PeerConnectionInterface.IceTransportsType */
diff --git a/sdk/android/api/org/webrtc/SslConfig.java b/sdk/android/api/org/webrtc/SslConfig.java
new file mode 100644
index 0000000..7a94928
--- /dev/null
+++ b/sdk/android/api/org/webrtc/SslConfig.java
@@ -0,0 +1,204 @@
+/*
+ *  Copyright 2018 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+package org.webrtc;
+
+import java.util.Collections;
+import java.util.List;
+import javax.annotation.Nullable;
+
+/**
+ * Java version of rtc::SSLConfig.
+ *
+ * Contains the configuration of any SSL/TLS connections that are initiated by
+ * our client.
+ */
+public class SslConfig {
+  /** Tracks rtc::TlsCertPolicy */
+  public enum TlsCertPolicy {
+    TLS_CERT_POLICY_SECURE,
+    TLS_CERT_POLICY_INSECURE_NO_CHECK,
+  }
+
+  /** Indicates whether to enable OCSP stapling in TLS. */
+  public final boolean enableOcspStapling;
+  /** Indicates whether to enable the signed certificate timestamp extension in TLS. */
+  public final boolean enableSignedCertTimestamp;
+  /** Indicates whether to enable the TLS Channel ID extension. */
+  public final boolean enableTlsChannelId;
+  /** Indicates whether to enable the TLS GREASE extension. */
+  public final boolean enableGrease;
+
+  /** Indicates how to process TURN server certificates */
+  public final TlsCertPolicy tlsCertPolicy;
+
+  /**
+   * Highest supported SSL version, as defined in the supported_versions TLS extension.
+   * If null, the default OpenSSL/BoringSSL max version will be used.
+   */
+  @Nullable public final Integer maxSslVersion;
+
+  /**
+   * List of protocols to be used in the TLS ALPN extension.
+   * If null, the default list of OpenSSL/BoringSSL ALPN protocols will be used.
+   */
+  @Nullable public final List<String> tlsAlpnProtocols;
+
+  /**
+   * List of elliptic curves to be used in the TLS elliptic curves extension.
+   * Only curve names supported by OpenSSL should be used (eg. "P-256","X25519").
+   * If null, the default list of OpenSSL/BoringSSL curves will be used.
+   */
+  @Nullable public final List<String> tlsEllipticCurves;
+
+  private SslConfig(boolean enableOcspStapling, boolean enableSignedCertTimestamp,
+      boolean enableTlsChannelId, boolean enableGrease, TlsCertPolicy tlsCertPolicy,
+      Integer maxSslVersion, List<String> tlsAlpnProtocols, List<String> tlsEllipticCurves) {
+    this.enableOcspStapling = enableOcspStapling;
+    this.enableSignedCertTimestamp = enableSignedCertTimestamp;
+    this.enableTlsChannelId = enableTlsChannelId;
+    this.enableGrease = enableGrease;
+    this.tlsCertPolicy = tlsCertPolicy;
+    this.maxSslVersion = maxSslVersion;
+    if (tlsAlpnProtocols != null) {
+      this.tlsAlpnProtocols = Collections.unmodifiableList(tlsAlpnProtocols);
+    } else {
+      this.tlsAlpnProtocols = null;
+    }
+    if (tlsEllipticCurves != null) {
+      this.tlsEllipticCurves = Collections.unmodifiableList(tlsEllipticCurves);
+    } else {
+      this.tlsEllipticCurves = null;
+    }
+  }
+
+  @Override
+  public String toString() {
+    return "[enableOcspStapling=" + enableOcspStapling + "] [enableSignedCertTimestamp="
+        + enableSignedCertTimestamp + "] [enableTlsChannelId=" + enableTlsChannelId
+        + "] [enableGrease=" + enableGrease + "] [tlsCertPolicy=" + tlsCertPolicy
+        + "] [maxSslVersion=" + maxSslVersion + "] [tlsAlpnProtocols=" + tlsAlpnProtocols
+        + "] [tlsEllipticCurves=" + tlsEllipticCurves + "]";
+  }
+
+  public static Builder builder() {
+    return new Builder();
+  }
+
+  public static class Builder {
+    private boolean enableOcspStapling;
+    private boolean enableSignedCertTimestamp;
+    private boolean enableTlsChannelId;
+    private boolean enableGrease;
+    private TlsCertPolicy tlsCertPolicy;
+    @Nullable private Integer maxSslVersion;
+    @Nullable private List<String> tlsAlpnProtocols;
+    @Nullable private List<String> tlsEllipticCurves;
+
+    private Builder() {
+      this.enableOcspStapling = true;
+      this.enableSignedCertTimestamp = true;
+      this.enableTlsChannelId = false;
+      this.enableGrease = false;
+      this.tlsCertPolicy = TlsCertPolicy.TLS_CERT_POLICY_SECURE;
+      this.maxSslVersion = null;
+      this.tlsAlpnProtocols = null;
+      this.tlsEllipticCurves = null;
+    }
+
+    public Builder setEnableOcspStapling(boolean enableOcspStapling) {
+      this.enableOcspStapling = enableOcspStapling;
+      return this;
+    }
+
+    public Builder setEnableSignedCertTimestamp(boolean enableSignedCertTimestamp) {
+      this.enableSignedCertTimestamp = enableSignedCertTimestamp;
+      return this;
+    }
+
+    public Builder setEnableTlsChannelId(boolean enableTlsChannelId) {
+      this.enableTlsChannelId = enableTlsChannelId;
+      return this;
+    }
+
+    public Builder setEnableGrease(boolean enableGrease) {
+      this.enableGrease = enableGrease;
+      return this;
+    }
+
+    public Builder setTlsCertPolicy(TlsCertPolicy tlsCertPolicy) {
+      this.tlsCertPolicy = tlsCertPolicy;
+      return this;
+    }
+
+    public Builder setMaxSslVersion(int maxSslVersion) {
+      this.maxSslVersion = maxSslVersion;
+      return this;
+    }
+
+    public Builder setTlsAlpnProtocols(List<String> tlsAlpnProtocols) {
+      this.tlsAlpnProtocols = tlsAlpnProtocols;
+      return this;
+    }
+
+    public Builder setTlsEllipticCurves(List<String> tlsEllipticCurves) {
+      this.tlsEllipticCurves = tlsEllipticCurves;
+      return this;
+    }
+
+    public SslConfig createSslConfig() {
+      return new SslConfig(enableOcspStapling, enableSignedCertTimestamp, enableTlsChannelId,
+          enableGrease, tlsCertPolicy, maxSslVersion, tlsAlpnProtocols, tlsEllipticCurves);
+    }
+  }
+
+  @CalledByNative
+  boolean getEnableOcspStapling() {
+    return enableOcspStapling;
+  }
+
+  @CalledByNative
+  boolean getEnableSignedCertTimestamp() {
+    return enableSignedCertTimestamp;
+  }
+
+  @CalledByNative
+  boolean getEnableTlsChannelId() {
+    return enableTlsChannelId;
+  }
+
+  @CalledByNative
+  boolean getEnableGrease() {
+    return enableGrease;
+  }
+
+  @CalledByNative
+  TlsCertPolicy getTlsCertPolicy() {
+    return tlsCertPolicy;
+  }
+
+  @Nullable
+  @CalledByNative
+  Integer getMaxSslVersion() {
+    return maxSslVersion;
+  }
+
+  @Nullable
+  @CalledByNative
+  List<String> getTlsAlpnProtocols() {
+    return tlsAlpnProtocols;
+  }
+
+  @Nullable
+  @CalledByNative
+  List<String> getTlsEllipticCurves() {
+    return tlsEllipticCurves;
+  }
+}