jdk/src/jdk.crypto.ec/share/native/libsunec/ECC_JNI.cpp

*** 1,7 ****
  /*
!  * Copyright (c) 2009, 2015, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
--- 1,7 ----
  /*
!  * Copyright (c) 2009, 2017, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
*** 88,97 ****
--- 88,141 ----
      return jEncodedBytes;
  }
  
  /*
   * Class:     sun_security_ec_ECKeyPairGenerator
+  * Method:    isCurveSupported
+  * Signature: ([B)Z
+  */
+ JNIEXPORT jboolean
+ JNICALL Java_sun_security_ec_ECKeyPairGenerator_isCurveSupported
+   (JNIEnv *env, jclass clazz, jbyteArray encodedParams)
+ {
+     SECKEYECParams params_item;
+     ECParams *ecparams = NULL;
+     jboolean result = JNI_FALSE;
+ 
+     // The curve is supported if we can get parameters for it
+     params_item.len = env->GetArrayLength(encodedParams);
+     params_item.data =
+         (unsigned char *) env->GetByteArrayElements(encodedParams, 0);
+     if (params_item.data == NULL) {
+         goto cleanup;
+     }
+ 
+     // Fill a new ECParams using the supplied OID
+     if (EC_DecodeParams(&params_item, &ecparams, 0) != SECSuccess) {
+         /* bad curve OID */
+         goto cleanup;
+     }
+ 
+     // If we make it to here, then the curve is supported
+     result = JNI_TRUE;
+ 
+ cleanup:
+     {
+         if (params_item.data) {
+             env->ReleaseByteArrayElements(encodedParams,
+                 (jbyte *) params_item.data, JNI_ABORT);
+         }
+         if (ecparams) {
+             FreeECParams(ecparams, true);
+         }
+     }
+ 
+     return result;
+ }
+ 
+ /*
+  * Class:     sun_security_ec_ECKeyPairGenerator
   * Method:    generateECKeyPair
   * Signature: (I[B[B)[[B
   */
  JNIEXPORT jobjectArray
  JNICALL Java_sun_security_ec_ECKeyPairGenerator_generateECKeyPair