diff --git a/aws/core/src/main/java/org/jclouds/aws/s3/S3AsyncClient.java b/aws/core/src/main/java/org/jclouds/aws/s3/S3AsyncClient.java
index 17cd8ab31d..da2cbd73d5 100644
--- a/aws/core/src/main/java/org/jclouds/aws/s3/S3AsyncClient.java
+++ b/aws/core/src/main/java/org/jclouds/aws/s3/S3AsyncClient.java
@@ -54,6 +54,7 @@ import org.jclouds.aws.s3.options.CopyObjectOptions;
 import org.jclouds.aws.s3.options.ListBucketOptions;
 import org.jclouds.aws.s3.options.PutBucketOptions;
 import org.jclouds.aws.s3.options.PutObjectOptions;
+import org.jclouds.aws.s3.predicates.validators.BucketNameValidator;
 import org.jclouds.aws.s3.xml.AccessControlListHandler;
 import org.jclouds.aws.s3.xml.BucketLoggingHandler;
 import org.jclouds.aws.s3.xml.CopyObjectHandler;
@@ -75,6 +76,7 @@ import org.jclouds.rest.annotations.ExceptionParser;
 import org.jclouds.rest.annotations.Headers;
 import org.jclouds.rest.annotations.HostPrefixParam;
 import org.jclouds.rest.annotations.ParamParser;
+import org.jclouds.rest.annotations.ParamValidators;
 import org.jclouds.rest.annotations.QueryParams;
 import org.jclouds.rest.annotations.RequestFilters;
 import org.jclouds.rest.annotations.ResponseParser;
@@ -116,7 +118,8 @@ public interface S3AsyncClient {
    @Path("{key}")
    @ExceptionParser(ReturnNullOnKeyNotFound.class)
    @ResponseParser(ParseObjectFromHeadersAndHttpContent.class)
-   ListenableFuture<S3Object> getObject(@HostPrefixParam String bucketName,
+   ListenableFuture<S3Object> getObject(
+            @HostPrefixParam @ParamValidators( { BucketNameValidator.class }) String bucketName,
             @PathParam("key") String key, GetOptions... options);
 
    /**
@@ -126,7 +129,8 @@ public interface S3AsyncClient {
    @Path("{key}")
    @ExceptionParser(ReturnNullOnKeyNotFound.class)
    @ResponseParser(ParseObjectMetadataFromHeaders.class)
-   ListenableFuture<ObjectMetadata> headObject(@HostPrefixParam String bucketName,
+   ListenableFuture<ObjectMetadata> headObject(
+            @HostPrefixParam @ParamValidators( { BucketNameValidator.class }) String bucketName,
             @PathParam("key") String key);
 
    /**
@@ -135,7 +139,8 @@ public interface S3AsyncClient {
    @HEAD
    @Path("{key}")
    @ExceptionParser(ReturnFalseOnKeyNotFound.class)
-   ListenableFuture<Boolean> objectExists(@HostPrefixParam String bucketName,
+   ListenableFuture<Boolean> objectExists(
+            @HostPrefixParam @ParamValidators( { BucketNameValidator.class }) String bucketName,
             @PathParam("key") String key);
 
    /**
@@ -144,7 +149,8 @@ public interface S3AsyncClient {
    @DELETE
    @Path("{key}")
    @ExceptionParser(ReturnVoidOnNotFoundOr404.class)
-   ListenableFuture<Void> deleteObject(@HostPrefixParam String bucketName,
+   ListenableFuture<Void> deleteObject(
+            @HostPrefixParam @ParamValidators( { BucketNameValidator.class }) String bucketName,
             @PathParam("key") String key);
 
    /**
@@ -154,7 +160,7 @@ public interface S3AsyncClient {
    @Path("{key}")
    @ResponseParser(ParseETagHeader.class)
    ListenableFuture<String> putObject(
-            @HostPrefixParam String bucketName,
+            @HostPrefixParam @ParamValidators( { BucketNameValidator.class }) String bucketName,
             @PathParam("key") @ParamParser(ObjectKey.class) @BinderParam(BindS3ObjectToPayload.class) S3Object object,
             PutObjectOptions... options);
 
@@ -167,7 +173,8 @@ public interface S3AsyncClient {
    ListenableFuture<Boolean> putBucketInRegion(
             // TODO endpoint based on region
             @BinderParam(BindRegionToXmlPayload.class) @Nullable String region,
-            @HostPrefixParam String bucketName, PutBucketOptions... options);
+            @HostPrefixParam @ParamValidators( { BucketNameValidator.class }) String bucketName,
+            PutBucketOptions... options);
 
    /**
     * @see S3Client#deleteBucketIfEmpty
@@ -175,7 +182,8 @@ public interface S3AsyncClient {
    @DELETE
    @Path("/")
    @ExceptionParser(ReturnTrueOn404OrNotFoundFalseIfNotEmpty.class)
-   ListenableFuture<Boolean> deleteBucketIfEmpty(@HostPrefixParam String bucketName);
+   ListenableFuture<Boolean> deleteBucketIfEmpty(
+            @HostPrefixParam @ParamValidators( { BucketNameValidator.class }) String bucketName);
 
    /**
     * @see S3Client#bucketExists
@@ -184,7 +192,8 @@ public interface S3AsyncClient {
    @Path("/")
    @QueryParams(keys = "max-keys", values = "0")
    @ExceptionParser(ReturnFalseOnContainerNotFound.class)
-   ListenableFuture<Boolean> bucketExists(@HostPrefixParam String bucketName);
+   ListenableFuture<Boolean> bucketExists(
+            @HostPrefixParam @ParamValidators( { BucketNameValidator.class }) String bucketName);
 
    /**
     * @see S3Client#getBucketLocation
@@ -193,7 +202,8 @@ public interface S3AsyncClient {
    @QueryParams(keys = "location")
    @Path("/")
    @XMLResponseParser(LocationConstraintHandler.class)
-   ListenableFuture<String> getBucketLocation(@HostPrefixParam String bucketName);
+   ListenableFuture<String> getBucketLocation(
+            @HostPrefixParam @ParamValidators( { BucketNameValidator.class }) String bucketName);
 
    /**
     * @see S3Client#getBucketPayer
@@ -202,7 +212,8 @@ public interface S3AsyncClient {
    @QueryParams(keys = "requestPayment")
    @Path("/")
    @XMLResponseParser(PayerHandler.class)
-   ListenableFuture<Payer> getBucketPayer(@HostPrefixParam String bucketName);
+   ListenableFuture<Payer> getBucketPayer(
+            @HostPrefixParam @ParamValidators( { BucketNameValidator.class }) String bucketName);
 
    /**
     * @see S3Client#setBucketPayer
@@ -210,7 +221,8 @@ public interface S3AsyncClient {
    @PUT
    @QueryParams(keys = "requestPayment")
    @Path("/")
-   ListenableFuture<Void> setBucketPayer(@HostPrefixParam String bucketName,
+   ListenableFuture<Void> setBucketPayer(
+            @HostPrefixParam @ParamValidators( { BucketNameValidator.class }) String bucketName,
             @BinderParam(BindPayerToXmlPayload.class) Payer payer);
 
    /**
@@ -219,7 +231,8 @@ public interface S3AsyncClient {
    @GET
    @Path("/")
    @XMLResponseParser(ListBucketHandler.class)
-   ListenableFuture<ListBucketResponse> listBucket(@HostPrefixParam String bucketName,
+   ListenableFuture<ListBucketResponse> listBucket(
+            @HostPrefixParam @ParamValidators( { BucketNameValidator.class }) String bucketName,
             ListBucketOptions... options);
 
    /**
@@ -237,9 +250,10 @@ public interface S3AsyncClient {
    @Path("{destinationObject}")
    @Headers(keys = "x-amz-copy-source", values = "/{sourceBucket}/{sourceObject}")
    @XMLResponseParser(CopyObjectHandler.class)
-   ListenableFuture<ObjectMetadata> copyObject(@PathParam("sourceBucket") String sourceBucket,
+   ListenableFuture<ObjectMetadata> copyObject(
+            @PathParam("sourceBucket") String sourceBucket,
             @PathParam("sourceObject") String sourceObject,
-            @HostPrefixParam String destinationBucket,
+            @HostPrefixParam @ParamValidators( { BucketNameValidator.class }) String destinationBucket,
             @PathParam("destinationObject") String destinationObject, CopyObjectOptions... options);
 
    /**
@@ -250,7 +264,8 @@ public interface S3AsyncClient {
    @XMLResponseParser(AccessControlListHandler.class)
    @ExceptionParser(ThrowContainerNotFoundOn404.class)
    @Path("/")
-   ListenableFuture<AccessControlList> getBucketACL(@HostPrefixParam String bucketName);
+   ListenableFuture<AccessControlList> getBucketACL(
+            @HostPrefixParam @ParamValidators( { BucketNameValidator.class }) String bucketName);
 
    /**
     * @see S3Client#putBucketACL
@@ -258,7 +273,8 @@ public interface S3AsyncClient {
    @PUT
    @Path("/")
    @QueryParams(keys = "acl")
-   ListenableFuture<Boolean> putBucketACL(@HostPrefixParam String bucketName,
+   ListenableFuture<Boolean> putBucketACL(
+            @HostPrefixParam @ParamValidators( { BucketNameValidator.class }) String bucketName,
             @BinderParam(BindACLToXMLPayload.class) AccessControlList acl);
 
    /**
@@ -269,7 +285,8 @@ public interface S3AsyncClient {
    @Path("{key}")
    @XMLResponseParser(AccessControlListHandler.class)
    @ExceptionParser(ThrowKeyNotFoundOn404.class)
-   ListenableFuture<AccessControlList> getObjectACL(@HostPrefixParam String bucketName,
+   ListenableFuture<AccessControlList> getObjectACL(
+            @HostPrefixParam @ParamValidators( { BucketNameValidator.class }) String bucketName,
             @PathParam("key") String key);
 
    /**
@@ -278,7 +295,8 @@ public interface S3AsyncClient {
    @PUT
    @QueryParams(keys = "acl")
    @Path("{key}")
-   ListenableFuture<Boolean> putObjectACL(@HostPrefixParam String bucketName,
+   ListenableFuture<Boolean> putObjectACL(
+            @HostPrefixParam @ParamValidators( { BucketNameValidator.class }) String bucketName,
             @PathParam("key") String key,
             @BinderParam(BindACLToXMLPayload.class) AccessControlList acl);
 
@@ -290,7 +308,8 @@ public interface S3AsyncClient {
    @XMLResponseParser(BucketLoggingHandler.class)
    @ExceptionParser(ThrowContainerNotFoundOn404.class)
    @Path("/")
-   ListenableFuture<BucketLogging> getBucketLogging(@HostPrefixParam String bucketName);
+   ListenableFuture<BucketLogging> getBucketLogging(
+            @HostPrefixParam @ParamValidators( { BucketNameValidator.class }) String bucketName);
 
    /**
     * @see S3Client#enableBucketLogging
@@ -298,7 +317,8 @@ public interface S3AsyncClient {
    @PUT
    @Path("/")
    @QueryParams(keys = "logging")
-   ListenableFuture<Void> enableBucketLogging(@HostPrefixParam String bucketName,
+   ListenableFuture<Void> enableBucketLogging(
+            @HostPrefixParam @ParamValidators( { BucketNameValidator.class }) String bucketName,
             @BinderParam(BindBucketLoggingToXmlPayload.class) BucketLogging logging);
 
    /**
@@ -308,6 +328,6 @@ public interface S3AsyncClient {
    @Path("/")
    @QueryParams(keys = "logging")
    ListenableFuture<Void> disableBucketLogging(
-            @BinderParam(BindNoBucketLoggingToXmlPayload.class) @HostPrefixParam String bucketName);
+            @BinderParam(BindNoBucketLoggingToXmlPayload.class) @HostPrefixParam @ParamValidators( { BucketNameValidator.class }) String bucketName);
 
 }
diff --git a/aws/core/src/test/java/org/jclouds/aws/s3/S3AsyncClientTest.java b/aws/core/src/test/java/org/jclouds/aws/s3/S3AsyncClientTest.java
index 78f16f7e76..dcb05a18a7 100644
--- a/aws/core/src/test/java/org/jclouds/aws/s3/S3AsyncClientTest.java
+++ b/aws/core/src/test/java/org/jclouds/aws/s3/S3AsyncClientTest.java
@@ -199,18 +199,29 @@ public class S3AsyncClientTest extends RestClientTest<S3AsyncClient> {
       checkFilters(httpMethod);
    }
 
+   @Test(expectedExceptions = IllegalArgumentException.class)
+   public void testCopyObjectInvalidName() throws ArrayIndexOutOfBoundsException,
+            SecurityException, IllegalArgumentException, NoSuchMethodException, IOException {
+      Method method = S3AsyncClient.class
+               .getMethod("copyObject", String.class, String.class, String.class, String.class,
+                        Array.newInstance(CopyObjectOptions.class, 0).getClass());
+      processor.createRequest(method, "sourceBucket", "sourceObject", "destinationBucket",
+               "destinationObject");
+
+   }
+
    public void testCopyObject() throws ArrayIndexOutOfBoundsException, SecurityException,
             IllegalArgumentException, NoSuchMethodException, IOException {
       Method method = S3AsyncClient.class
                .getMethod("copyObject", String.class, String.class, String.class, String.class,
                         Array.newInstance(CopyObjectOptions.class, 0).getClass());
       GeneratedHttpRequest<S3AsyncClient> httpMethod = processor.createRequest(method,
-               "sourceBucket", "sourceObject", "destinationBucket", "destinationObject");
+               "sourceBucket", "sourceObject", "destinationbucket", "destinationObject");
 
       assertRequestLineEquals(httpMethod,
-               "PUT http://destinationBucket.stub:8080/destinationObject HTTP/1.1");
+               "PUT http://destinationbucket.stub:8080/destinationObject HTTP/1.1");
       assertHeadersEqual(httpMethod,
-               "Content-Length: 0\nHost: destinationBucket.stub\nx-amz-copy-source: /sourceBucket/sourceObject\n");
+               "Content-Length: 0\nHost: destinationbucket.stub\nx-amz-copy-source: /sourceBucket/sourceObject\n");
       assertPayloadEquals(httpMethod, null);
 
       assertResponseParserClassEquals(method, httpMethod, ParseSax.class);
diff --git a/core/src/main/java/org/jclouds/predicates/validators/DnsNameValidator.java b/core/src/main/java/org/jclouds/predicates/validators/DnsNameValidator.java
index f0873e3cec..64d96d4647 100644
--- a/core/src/main/java/org/jclouds/predicates/validators/DnsNameValidator.java
+++ b/core/src/main/java/org/jclouds/predicates/validators/DnsNameValidator.java
@@ -65,11 +65,15 @@ public class DnsNameValidator extends Validator<String> {
        * digits 0 through 9". From Azure: Every Dash (-) Must Be Immediately Preceded and Followed
        * by a Letter or Number.
        */
-      CharMatcher lettersNumbersOrDashes = inRange('a', 'z').or(inRange('0', '9').or(is('-')));
-      if (!lettersNumbersOrDashes.matchesAllOf(name))
+      CharMatcher range = getAcceptableRange();
+      if (!range.matchesAllOf(name))
          throw exception(name, "Should have lowercase ASCII letters, " + "numbers, or dashes");
    }
 
+   protected CharMatcher getAcceptableRange() {
+      return inRange('a', 'z').or(inRange('0', '9').or(is('-')));
+   }
+
    protected IllegalArgumentException exception(String vAppName, String reason) {
       return new IllegalArgumentException(String.format(
                "Object '%s' doesn't match dns naming constraints. " + "Reason: %s.", vAppName,