[Android] Remove repeated calls to beginHandshake (#78849)

Cleanup

Revert some changes

Author: simonrozsival

src/native/libs/System.Security.Cryptography.Native.Android/pal_jni.c

@@ -419,6 +419,7 @@ jmethodID g_SSLEngineBeginHandshake;
 jmethodID g_SSLEngineCloseOutbound;
 jmethodID g_SSLEngineGetApplicationProtocol;
 jmethodID g_SSLEngineGetHandshakeStatus;
+jmethodID g_SSLEngineGetHandshakeSession;
 jmethodID g_SSLEngineGetSession;
 jmethodID g_SSLEngineGetSSLParameters;
 jmethodID g_SSLEngineGetSupportedProtocols;
@@ -1002,6 +1003,7 @@ JNI_OnLoad(JavaVM *vm, void *reserved)
     g_SSLEngineGetApplicationProtocol = GetOptionalMethod(env, false, g_SSLEngine, "getApplicationProtocol", "()Ljava/lang/String;");
     g_SSLEngineGetHandshakeStatus =     GetMethod(env, false, g_SSLEngine, "getHandshakeStatus", "()Ljavax/net/ssl/SSLEngineResult$HandshakeStatus;");
     g_SSLEngineGetSession =             GetMethod(env, false, g_SSLEngine, "getSession", "()Ljavax/net/ssl/SSLSession;");
+    g_SSLEngineGetHandshakeSession =    GetOptionalMethod(env, false, g_SSLEngine, "getHandshakeSession", "()Ljavax/net/ssl/SSLSession;");
     g_SSLEngineGetSSLParameters =       GetMethod(env, false, g_SSLEngine, "getSSLParameters", "()Ljavax/net/ssl/SSLParameters;");
     g_SSLEngineGetSupportedProtocols =  GetMethod(env, false, g_SSLEngine, "getSupportedProtocols", "()[Ljava/lang/String;");
     g_SSLEngineSetEnabledProtocols =    GetMethod(env, false, g_SSLEngine, "setEnabledProtocols", "([Ljava/lang/String;)V");

src/native/libs/System.Security.Cryptography.Native.Android/pal_jni.h

@@ -433,6 +433,7 @@ extern jmethodID g_SSLEngineBeginHandshake;
 extern jmethodID g_SSLEngineCloseOutbound;
 extern jmethodID g_SSLEngineGetApplicationProtocol;
 extern jmethodID g_SSLEngineGetHandshakeStatus;
+extern jmethodID g_SSLEngineGetHandshakeSession;
 extern jmethodID g_SSLEngineGetSession;
 extern jmethodID g_SSLEngineGetSSLParameters;
 extern jmethodID g_SSLEngineGetSupportedProtocols;

src/native/libs/System.Security.Cryptography.Native.Android/pal_sslstream.c

@@ -40,6 +40,27 @@ static bool IsHandshaking(int handshakeStatus)
     return handshakeStatus != HANDSHAKE_STATUS__NOT_HANDSHAKING && handshakeStatus != HANDSHAKE_STATUS__FINISHED;
 }
 
+static jobject GetSslSessionForHandshakeStatus(JNIEnv* env, SSLStream* sslStream, int handshakeStatus)
+{
+    // SSLEngine.getHandshakeSession() is available since API 24
+    jobject sslSession = IsHandshaking(handshakeStatus) && g_SSLEngineGetHandshakeSession != NULL
+        ? (*env)->CallObjectMethod(env, sslStream->sslEngine, g_SSLEngineGetHandshakeSession)
+        : (*env)->CallObjectMethod(env, sslStream->sslEngine, g_SSLEngineGetSession);
+    if (CheckJNIExceptions(env))
+        return NULL;
+
+    return sslSession;
+}
+
+static jobject GetCurrentSslSession(JNIEnv* env, SSLStream* sslStream)
+{
+    int handshakeStatus = GetEnumAsInt(env, (*env)->CallObjectMethod(env, sslStream->sslEngine, g_SSLEngineGetHandshakeStatus));
+    if (CheckJNIExceptions(env))
+        return NULL;
+
+    return GetSslSessionForHandshakeStatus(env, sslStream, handshakeStatus);
+}
+
 ARGS_NON_NULL_ALL static PAL_SSLStreamStatus Close(JNIEnv* env, SSLStream* sslStream)
 {
     // Call wrap to clear any remaining data before closing
@@ -523,10 +544,13 @@ PAL_SSLStreamStatus AndroidCryptoNative_SSLStreamHandshake(SSLStream* sslStream)
     abort_if_invalid_pointer_argument (sslStream);
     JNIEnv* env = GetJNIEnv();
 
-    // sslEngine.beginHandshake();
-    (*env)->CallVoidMethod(env, sslStream->sslEngine, g_SSLEngineBeginHandshake);
-    if (CheckJNIExceptions(env))
-        return SSLStreamStatus_Error;
+    int handshakeStatus = GetEnumAsInt(env, (*env)->CallObjectMethod(env, sslStream->sslEngine, g_SSLEngineGetHandshakeStatus));
+    if (!IsHandshaking(handshakeStatus)) {
+        // sslEngine.beginHandshake();
+        (*env)->CallVoidMethod(env, sslStream->sslEngine, g_SSLEngineBeginHandshake);
+        if (CheckJNIExceptions(env))
+            return SSLStreamStatus_Error;
+    }
 
     return DoHandshake(env, sslStream);
 }
@@ -705,14 +729,16 @@ int32_t AndroidCryptoNative_SSLStreamGetCipherSuite(SSLStream* sslStream, uint16
     *out = NULL;
 
     // String cipherSuite = sslSession.getCipherSuite();
-    jstring cipherSuite = (*env)->CallObjectMethod(env, sslStream->sslSession, g_SSLSessionGetCipherSuite);
+    jobject sslSession = GetCurrentSslSession(env, sslStream);
+    jstring cipherSuite = (*env)->CallObjectMethod(env, sslSession, g_SSLSessionGetCipherSuite);
     ON_EXCEPTION_PRINT_AND_GOTO(cleanup);
     *out = AllocateString(env, cipherSuite);
 
     ret = SUCCESS;
 
 cleanup:
-    (*env)->DeleteLocalRef(env, cipherSuite);
+    ReleaseLRef(env, sslSession);
+    ReleaseLRef(env, cipherSuite);
     return ret;
 }
 
@@ -726,14 +752,16 @@ int32_t AndroidCryptoNative_SSLStreamGetProtocol(SSLStream* sslStream, uint16_t*
     *out = NULL;
 
     // String protocol = sslSession.getProtocol();
-    jstring protocol = (*env)->CallObjectMethod(env, sslStream->sslSession, g_SSLSessionGetProtocol);
+    jobject sslSession = GetCurrentSslSession(env, sslStream);
+    jstring protocol = (*env)->CallObjectMethod(env, sslSession, g_SSLSessionGetProtocol);
     ON_EXCEPTION_PRINT_AND_GOTO(cleanup);
     *out = AllocateString(env, protocol);
 
     ret = SUCCESS;
 
 cleanup:
-    (*env)->DeleteLocalRef(env, protocol);
+    ReleaseLRef(env, sslSession);
+    ReleaseLRef(env, protocol);
     return ret;
 }
 
@@ -746,7 +774,8 @@ jobject /*X509Certificate*/ AndroidCryptoNative_SSLStreamGetPeerCertificate(SSLS
 
     // Certificate[] certs = sslSession.getPeerCertificates();
     // out = certs[0];
-    jobjectArray certs = (*env)->CallObjectMethod(env, sslStream->sslSession, g_SSLSessionGetPeerCertificates);
+    jobject sslSession = GetCurrentSslSession(env, sslStream);
+    jobjectArray certs = (*env)->CallObjectMethod(env, sslSession, g_SSLSessionGetPeerCertificates);
 
     // If there are no peer certificates, getPeerCertificates will throw. Return null to indicate no certificate.
     if (TryClearJNIExceptions(env))
@@ -761,7 +790,8 @@ jobject /*X509Certificate*/ AndroidCryptoNative_SSLStreamGetPeerCertificate(SSLS
     }
 
 cleanup:
-    (*env)->DeleteLocalRef(env, certs);
+    ReleaseLRef(env, sslSession);
+    ReleaseLRef(env, certs);
     return ret;
 }
 
@@ -779,7 +809,8 @@ void AndroidCryptoNative_SSLStreamGetPeerCertificates(SSLStream* sslStream, jobj
     // for (int i = 0; i < certs.length; i++) {
     //     out[i] = certs[i];
     // }
-    jobjectArray certs = (*env)->CallObjectMethod(env, sslStream->sslSession, g_SSLSessionGetPeerCertificates);
+    jobject sslSession = GetCurrentSslSession(env, sslStream);
+    jobjectArray certs = (*env)->CallObjectMethod(env, sslSession, g_SSLSessionGetPeerCertificates);
 
     // If there are no peer certificates, getPeerCertificates will throw. Return null and length of zero to indicate no certificates.
     if (TryClearJNIExceptions(env))
@@ -798,7 +829,8 @@ void AndroidCryptoNative_SSLStreamGetPeerCertificates(SSLStream* sslStream, jobj
     }
 
 cleanup:
-    (*env)->DeleteLocalRef(env, certs);
+    ReleaseLRef(env, sslSession);
+    ReleaseLRef(env, certs);
 }
 
 void AndroidCryptoNative_SSLStreamRequestClientAuthentication(SSLStream* sslStream)
@@ -912,14 +944,15 @@ bool AndroidCryptoNative_SSLStreamVerifyHostname(SSLStream* sslStream, char* hos
     JNIEnv* env = GetJNIEnv();
 
     bool ret = false;
-    INIT_LOCALS(loc, name, verifier);
+    INIT_LOCALS(loc, name, verifier, sslSession);
 
     // HostnameVerifier verifier = HttpsURLConnection.getDefaultHostnameVerifier();
     // return verifier.verify(hostname, sslSession);
     loc[name] = make_java_string(env, hostname);
+    loc[sslSession] = GetCurrentSslSession(env, sslStream);
     loc[verifier] =
         (*env)->CallStaticObjectMethod(env, g_HttpsURLConnection, g_HttpsURLConnectionGetDefaultHostnameVerifier);
-    ret = (*env)->CallBooleanMethod(env, loc[verifier], g_HostnameVerifierVerify, loc[name], sslStream->sslSession);
+    ret = (*env)->CallBooleanMethod(env, loc[verifier], g_HostnameVerifierVerify, loc[name], loc[sslSession]);
 
     RELEASE_LOCALS(loc, env);
     return ret;