diff --git a/include/grpc/grpc_security.h b/include/grpc/grpc_security.h
index ff84050c6d7..640c1fda986 100644
--- a/include/grpc/grpc_security.h
+++ b/include/grpc/grpc_security.h
@@ -199,8 +199,6 @@ grpc_call_error grpc_call_set_credentials(grpc_call *call,
 
 /* --- Authentication Context. --- */
 
-/* TODO(jboeuf): Define some well-known property names. */
-
 #define GRPC_TRANSPORT_SECURITY_TYPE_PROPERTY_NAME "transport_security_type"
 #define GRPC_SSL_TRANSPORT_SECURITY_TYPE "ssl"
 
@@ -255,6 +253,49 @@ grpc_auth_context *grpc_call_auth_context(grpc_call *call);
 /* Releases the auth context returned from grpc_call_auth_context. */
 void grpc_auth_context_release(grpc_auth_context *context);
 
+/* --
+   The following auth context methods should only be called by a server metadata
+   processor to set properties extracted from auth metadata.
+   -- */
+
+/* Add a property. */
+void grpc_auth_context_add_property(grpc_auth_context *ctx, const char *name,
+                                    const char *value, size_t value_length);
+
+/* Add a C string property. */
+void grpc_auth_context_add_cstring_property(grpc_auth_context *ctx,
+                                            const char *name,
+                                            const char *value);
+
+/* Sets the property name. Returns 1 if successful or 0 in case of failure
+   (which means that no property with this name exists). */
+int grpc_auth_context_set_peer_identity_property_name(grpc_auth_context *ctx,
+                                                      const char *name);
+
+/* --- Auth Metadata Processing --- */
+
+/* Callback function that is called when the metadata processing is done.
+   success is 1 if processing succeeded, 0 otherwise.
+   Consumed metadata will be removed from the set of metadata available on the
+   call. */
+typedef void (*grpc_process_auth_metadata_done_cb)(
+    void *user_data, const grpc_metadata *consumed_md, size_t num_consumed_md,
+    int success);
+
+/* Pluggable server-side metadata processor object. */
+typedef struct {
+  /* The context object is read/write: it contains the properties of the
+     channel peer and it is the job of the process function to augment it with
+     properties derived from the passed-in metadata. */
+  void (*process)(void *state, grpc_auth_context *context,
+                  const grpc_metadata *md, size_t md_count,
+                  grpc_process_auth_metadata_done_cb cb, void *user_data);
+  void *state;
+} grpc_auth_metadata_processor;
+
+void grpc_server_credentials_set_auth_metadata_processor(
+    grpc_server_credentials *creds, grpc_auth_metadata_processor processor);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/core/channel/compress_filter.c b/src/core/channel/compress_filter.c
index 9fc8589fbb4..8963c13b0f5 100644
--- a/src/core/channel/compress_filter.c
+++ b/src/core/channel/compress_filter.c
@@ -204,7 +204,7 @@ static void process_send_ops(grpc_call_element *elem,
           }
           grpc_metadata_batch_add_tail(
               &(sop->data.metadata), &calld->compression_algorithm_storage,
-              grpc_mdelem_ref(channeld->mdelem_compression_algorithms
+              GRPC_MDELEM_REF(channeld->mdelem_compression_algorithms
                                   [calld->compression_algorithm]));
           calld->written_initial_metadata = 1; /* GPR_TRUE */
         }
@@ -295,7 +295,7 @@ static void init_channel_elem(grpc_channel_element *elem, grpc_channel *master,
     channeld->mdelem_compression_algorithms[algo_idx] =
         grpc_mdelem_from_metadata_strings(
             mdctx,
-            grpc_mdstr_ref(channeld->mdstr_outgoing_compression_algorithm_key),
+            GRPC_MDSTR_REF(channeld->mdstr_outgoing_compression_algorithm_key),
             grpc_mdstr_from_string(mdctx, algorithm_name, 0));
   }
 
@@ -307,11 +307,11 @@ static void destroy_channel_elem(grpc_channel_element *elem) {
   channel_data *channeld = elem->channel_data;
   grpc_compression_algorithm algo_idx;
 
-  grpc_mdstr_unref(channeld->mdstr_request_compression_algorithm_key);
-  grpc_mdstr_unref(channeld->mdstr_outgoing_compression_algorithm_key);
+  GRPC_MDSTR_UNREF(channeld->mdstr_request_compression_algorithm_key);
+  GRPC_MDSTR_UNREF(channeld->mdstr_outgoing_compression_algorithm_key);
   for (algo_idx = 0; algo_idx < GRPC_COMPRESS_ALGORITHMS_COUNT;
        ++algo_idx) {
-    grpc_mdelem_unref(channeld->mdelem_compression_algorithms[algo_idx]);
+    GRPC_MDELEM_UNREF(channeld->mdelem_compression_algorithms[algo_idx]);
   }
 }
 
diff --git a/src/core/security/client_auth_filter.c b/src/core/security/client_auth_filter.c
index e86b5430b2c..e2d1b6fce91 100644
--- a/src/core/security/client_auth_filter.c
+++ b/src/core/security/client_auth_filter.c
@@ -77,10 +77,8 @@ typedef struct {
 
 static void bubble_up_error(grpc_call_element *elem, const char *error_msg) {
   call_data *calld = elem->call_data;
-  channel_data *chand = elem->channel_data;
-  grpc_transport_stream_op_add_cancellation(
-      &calld->op, GRPC_STATUS_UNAUTHENTICATED,
-      grpc_mdstr_from_string(chand->md_ctx, error_msg, 0));
+  grpc_transport_stream_op_add_cancellation(&calld->op,
+                                            GRPC_STATUS_UNAUTHENTICATED);
   grpc_call_next_op(elem, &calld->op);
 }
 
diff --git a/src/core/security/credentials.c b/src/core/security/credentials.c
index 15268cefbe2..2239f573783 100644
--- a/src/core/security/credentials.c
+++ b/src/core/security/credentials.c
@@ -149,6 +149,12 @@ grpc_security_status grpc_server_credentials_create_security_connector(
   return creds->vtable->create_security_connector(creds, sc);
 }
 
+void grpc_server_credentials_set_auth_metadata_processor(
+    grpc_server_credentials *creds, grpc_auth_metadata_processor processor) {
+  if (creds == NULL) return;
+  creds->processor = processor;
+}
+
 /* -- Ssl credentials. -- */
 
 static void ssl_destroy(grpc_credentials *creds) {
@@ -765,19 +771,19 @@ grpc_credentials *grpc_refresh_token_credentials_create(
       grpc_auth_refresh_token_create_from_string(json_refresh_token));
 }
 
-/* -- Fake Oauth2 credentials. -- */
+/* -- Metadata-only credentials. -- */
 
-static void fake_oauth2_destroy(grpc_credentials *creds) {
-  grpc_fake_oauth2_credentials *c = (grpc_fake_oauth2_credentials *)creds;
-  grpc_credentials_md_store_unref(c->access_token_md);
+static void md_only_test_destroy(grpc_credentials *creds) {
+  grpc_md_only_test_credentials *c = (grpc_md_only_test_credentials *)creds;
+  grpc_credentials_md_store_unref(c->md_store);
   gpr_free(c);
 }
 
-static int fake_oauth2_has_request_metadata(const grpc_credentials *creds) {
+static int md_only_test_has_request_metadata(const grpc_credentials *creds) {
   return 1;
 }
 
-static int fake_oauth2_has_request_metadata_only(
+static int md_only_test_has_request_metadata_only(
     const grpc_credentials *creds) {
   return 1;
 }
@@ -785,19 +791,19 @@ static int fake_oauth2_has_request_metadata_only(
 void on_simulated_token_fetch_done(void *user_data, int success) {
   grpc_credentials_metadata_request *r =
       (grpc_credentials_metadata_request *)user_data;
-  grpc_fake_oauth2_credentials *c = (grpc_fake_oauth2_credentials *)r->creds;
+  grpc_md_only_test_credentials *c = (grpc_md_only_test_credentials *)r->creds;
   GPR_ASSERT(success);
-  r->cb(r->user_data, c->access_token_md->entries,
-        c->access_token_md->num_entries, GRPC_CREDENTIALS_OK);
+  r->cb(r->user_data, c->md_store->entries,
+        c->md_store->num_entries, GRPC_CREDENTIALS_OK);
   grpc_credentials_metadata_request_destroy(r);
 }
 
-static void fake_oauth2_get_request_metadata(grpc_credentials *creds,
+static void md_only_test_get_request_metadata(grpc_credentials *creds,
                                              grpc_pollset *pollset,
                                              const char *service_url,
                                              grpc_credentials_metadata_cb cb,
                                              void *user_data) {
-  grpc_fake_oauth2_credentials *c = (grpc_fake_oauth2_credentials *)creds;
+  grpc_md_only_test_credentials *c = (grpc_md_only_test_credentials *)creds;
 
   if (c->is_async) {
     grpc_credentials_metadata_request *cb_arg =
@@ -806,26 +812,26 @@ static void fake_oauth2_get_request_metadata(grpc_credentials *creds,
                             on_simulated_token_fetch_done, cb_arg);
     grpc_iomgr_add_callback(cb_arg->on_simulated_token_fetch_done_closure);
   } else {
-    cb(user_data, c->access_token_md->entries, 1, GRPC_CREDENTIALS_OK);
+    cb(user_data, c->md_store->entries, 1, GRPC_CREDENTIALS_OK);
   }
 }
 
-static grpc_credentials_vtable fake_oauth2_vtable = {
-    fake_oauth2_destroy, fake_oauth2_has_request_metadata,
-    fake_oauth2_has_request_metadata_only, fake_oauth2_get_request_metadata,
+static grpc_credentials_vtable md_only_test_vtable = {
+    md_only_test_destroy, md_only_test_has_request_metadata,
+    md_only_test_has_request_metadata_only, md_only_test_get_request_metadata,
     NULL};
 
-grpc_credentials *grpc_fake_oauth2_credentials_create(
-    const char *token_md_value, int is_async) {
-  grpc_fake_oauth2_credentials *c =
-      gpr_malloc(sizeof(grpc_fake_oauth2_credentials));
-  memset(c, 0, sizeof(grpc_fake_oauth2_credentials));
+grpc_credentials *grpc_md_only_test_credentials_create(const char *md_key,
+                                                       const char *md_value,
+                                                       int is_async) {
+  grpc_md_only_test_credentials *c =
+      gpr_malloc(sizeof(grpc_md_only_test_credentials));
+  memset(c, 0, sizeof(grpc_md_only_test_credentials));
   c->base.type = GRPC_CREDENTIALS_TYPE_OAUTH2;
-  c->base.vtable = &fake_oauth2_vtable;
+  c->base.vtable = &md_only_test_vtable;
   gpr_ref_init(&c->base.refcount, 1);
-  c->access_token_md = grpc_credentials_md_store_create(1);
-  grpc_credentials_md_store_add_cstrings(
-      c->access_token_md, GRPC_AUTHORIZATION_METADATA_KEY, token_md_value);
+  c->md_store = grpc_credentials_md_store_create(1);
+  grpc_credentials_md_store_add_cstrings(c->md_store, md_key, md_value);
   c->is_async = is_async;
   return &c->base;
 }
diff --git a/src/core/security/credentials.h b/src/core/security/credentials.h
index 8d40da47c17..04736525dcc 100644
--- a/src/core/security/credentials.h
+++ b/src/core/security/credentials.h
@@ -190,9 +190,10 @@ grpc_oauth2_token_fetcher_credentials_parse_server_response(
     grpc_credentials_md_store **token_md, gpr_timespec *token_lifetime);
 void grpc_flush_cached_google_default_credentials(void);
 
-/* Simulates an oauth2 token fetch with the specified value for testing. */
-grpc_credentials *grpc_fake_oauth2_credentials_create(
-    const char *token_md_value, int is_async);
+/* Metadata-only credentials with the specified key and value where
+   asynchronicity can be simulated for testing. */
+grpc_credentials *grpc_md_only_test_credentials_create(
+    const char *md_key, const char *md_value, int is_async);
 
 /* Private constructor for jwt credentials from an already parsed json key.
    Takes ownership of the key. */
@@ -216,6 +217,7 @@ typedef struct {
 struct grpc_server_credentials {
   const grpc_server_credentials_vtable *vtable;
   const char *type;
+  grpc_auth_metadata_processor processor;
 };
 
 grpc_security_status grpc_server_credentials_create_security_connector(
@@ -297,13 +299,13 @@ typedef struct {
   grpc_credentials_md_store *access_token_md;
 } grpc_access_token_credentials;
 
-/* -- Fake Oauth2 credentials. -- */
+/* --  Metadata-only Test credentials. -- */
 
 typedef struct {
   grpc_credentials base;
-  grpc_credentials_md_store *access_token_md;
+  grpc_credentials_md_store *md_store;
   int is_async;
-} grpc_fake_oauth2_credentials;
+} grpc_md_only_test_credentials;
 
 /* -- IAM credentials. -- */
 
diff --git a/src/core/security/security_connector.c b/src/core/security/security_connector.c
index 726b4c1e123..a354536dcd3 100644
--- a/src/core/security/security_connector.c
+++ b/src/core/security/security_connector.c
@@ -263,9 +263,9 @@ static grpc_security_status fake_check_peer(grpc_security_connector *sc,
     goto end;
   }
   GRPC_AUTH_CONTEXT_UNREF(sc->auth_context, "connector");
-  sc->auth_context = grpc_auth_context_create(NULL, 1);
-  sc->auth_context->properties[0] = grpc_auth_property_init_from_cstring(
-      GRPC_TRANSPORT_SECURITY_TYPE_PROPERTY_NAME,
+  sc->auth_context = grpc_auth_context_create(NULL);
+  grpc_auth_context_add_cstring_property(
+      sc->auth_context, GRPC_TRANSPORT_SECURITY_TYPE_PROPERTY_NAME,
       GRPC_FAKE_TRANSPORT_SECURITY_TYPE);
 
 end:
@@ -409,31 +409,35 @@ static int ssl_host_matches_name(const tsi_peer *peer, const char *peer_name) {
 grpc_auth_context *tsi_ssl_peer_to_auth_context(const tsi_peer *peer) {
   size_t i;
   grpc_auth_context *ctx = NULL;
+  const char *peer_identity_property_name = NULL;
 
   /* The caller has checked the certificate type property. */
   GPR_ASSERT(peer->property_count >= 1);
-  ctx = grpc_auth_context_create(NULL, peer->property_count);
-  ctx->properties[0] = grpc_auth_property_init_from_cstring(
-      GRPC_TRANSPORT_SECURITY_TYPE_PROPERTY_NAME,
+  ctx = grpc_auth_context_create(NULL);
+  grpc_auth_context_add_cstring_property(
+      ctx, GRPC_TRANSPORT_SECURITY_TYPE_PROPERTY_NAME,
       GRPC_SSL_TRANSPORT_SECURITY_TYPE);
-  ctx->property_count = 1;
   for (i = 0; i < peer->property_count; i++) {
     const tsi_peer_property *prop = &peer->properties[i];
     if (prop->name == NULL) continue;
     if (strcmp(prop->name, TSI_X509_SUBJECT_COMMON_NAME_PEER_PROPERTY) == 0) {
       /* If there is no subject alt name, have the CN as the identity. */
-      if (ctx->peer_identity_property_name == NULL) {
-        ctx->peer_identity_property_name = GRPC_X509_CN_PROPERTY_NAME;
+      if (peer_identity_property_name == NULL) {
+        peer_identity_property_name = GRPC_X509_CN_PROPERTY_NAME;
       }
-      ctx->properties[ctx->property_count++] = grpc_auth_property_init(
-          GRPC_X509_CN_PROPERTY_NAME, prop->value.data, prop->value.length);
+      grpc_auth_context_add_property(ctx, GRPC_X509_CN_PROPERTY_NAME,
+                                     prop->value.data, prop->value.length);
     } else if (strcmp(prop->name,
                       TSI_X509_SUBJECT_ALTERNATIVE_NAME_PEER_PROPERTY) == 0) {
-      ctx->peer_identity_property_name = GRPC_X509_SAN_PROPERTY_NAME;
-      ctx->properties[ctx->property_count++] = grpc_auth_property_init(
-          GRPC_X509_SAN_PROPERTY_NAME, prop->value.data, prop->value.length);
+      peer_identity_property_name = GRPC_X509_SAN_PROPERTY_NAME;
+      grpc_auth_context_add_property(ctx, GRPC_X509_SAN_PROPERTY_NAME,
+                                     prop->value.data, prop->value.length);
     }
   }
+  if (peer_identity_property_name != NULL) {
+    GPR_ASSERT(grpc_auth_context_set_peer_identity_property_name(
+                   ctx, peer_identity_property_name) == 1);
+  }
   return ctx;
 }
 
diff --git a/src/core/security/security_context.c b/src/core/security/security_context.c
index 8ce7876bd8f..1ef0fc9255b 100644
--- a/src/core/security/security_context.c
+++ b/src/core/security/security_context.c
@@ -42,6 +42,19 @@
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 
+/* --- grpc_process_auth_metadata_func --- */
+
+static grpc_auth_metadata_processor server_processor = {NULL, NULL};
+
+grpc_auth_metadata_processor grpc_server_get_auth_metadata_processor(void) {
+  return server_processor;
+}
+
+void grpc_server_register_auth_metadata_processor(
+    grpc_auth_metadata_processor processor) {
+  server_processor = processor;
+}
+
 /* --- grpc_call --- */
 
 grpc_call_error grpc_call_set_credentials(grpc_call *call,
@@ -120,15 +133,15 @@ void grpc_server_security_context_destroy(void *ctx) {
 
 static grpc_auth_property_iterator empty_iterator = {NULL, 0, NULL};
 
-grpc_auth_context *grpc_auth_context_create(grpc_auth_context *chained,
-                                            size_t property_count) {
+grpc_auth_context *grpc_auth_context_create(grpc_auth_context *chained) {
   grpc_auth_context *ctx = gpr_malloc(sizeof(grpc_auth_context));
   memset(ctx, 0, sizeof(grpc_auth_context));
-  ctx->properties = gpr_malloc(property_count * sizeof(grpc_auth_property));
-  memset(ctx->properties, 0, property_count * sizeof(grpc_auth_property));
-  ctx->property_count = property_count;
   gpr_ref_init(&ctx->refcount, 1);
-  if (chained != NULL) ctx->chained = GRPC_AUTH_CONTEXT_REF(chained, "chained");
+  if (chained != NULL) {
+    ctx->chained = GRPC_AUTH_CONTEXT_REF(chained, "chained");
+    ctx->peer_identity_property_name =
+        ctx->chained->peer_identity_property_name;
+  }
   return ctx;
 }
 
@@ -162,11 +175,11 @@ void grpc_auth_context_unref(grpc_auth_context *ctx) {
   if (gpr_unref(&ctx->refcount)) {
     size_t i;
     GRPC_AUTH_CONTEXT_UNREF(ctx->chained, "chained");
-    if (ctx->properties != NULL) {
-      for (i = 0; i < ctx->property_count; i++) {
-        grpc_auth_property_reset(&ctx->properties[i]);
+    if (ctx->properties.array != NULL) {
+      for (i = 0; i < ctx->properties.count; i++) {
+        grpc_auth_property_reset(&ctx->properties.array[i]);
       }
-      gpr_free(ctx->properties);
+      gpr_free(ctx->properties.array);
     }
     gpr_free(ctx);
   }
@@ -177,6 +190,20 @@ const char *grpc_auth_context_peer_identity_property_name(
   return ctx->peer_identity_property_name;
 }
 
+int grpc_auth_context_set_peer_identity_property_name(grpc_auth_context *ctx,
+                                                      const char *name) {
+  grpc_auth_property_iterator it =
+      grpc_auth_context_find_properties_by_name(ctx, name);
+  const grpc_auth_property *prop = grpc_auth_property_iterator_next(&it);
+  if (prop == NULL) {
+    gpr_log(GPR_ERROR, "Property name %s not found in auth context.",
+            name != NULL ? name : "NULL");
+    return 0;
+  }
+  ctx->peer_identity_property_name = prop->name;
+  return 1;
+}
+
 int grpc_auth_context_peer_is_authenticated(
     const grpc_auth_context *ctx) {
   return ctx->peer_identity_property_name == NULL ? 0 : 1;
@@ -193,16 +220,16 @@ grpc_auth_property_iterator grpc_auth_context_property_iterator(
 const grpc_auth_property *grpc_auth_property_iterator_next(
     grpc_auth_property_iterator *it) {
   if (it == NULL || it->ctx == NULL) return NULL;
-  while (it->index == it->ctx->property_count) {
+  while (it->index == it->ctx->properties.count) {
     if (it->ctx->chained == NULL) return NULL;
     it->ctx = it->ctx->chained;
     it->index = 0;
   }
   if (it->name == NULL) {
-    return &it->ctx->properties[it->index++];
+    return &it->ctx->properties.array[it->index++];
   } else {
-    while (it->index < it->ctx->property_count) {
-      const grpc_auth_property *prop = &it->ctx->properties[it->index++];
+    while (it->index < it->ctx->properties.count) {
+      const grpc_auth_property *prop = &it->ctx->properties.array[it->index++];
       GPR_ASSERT(prop->name != NULL);
       if (strcmp(it->name, prop->name) == 0) {
         return prop;
@@ -229,24 +256,37 @@ grpc_auth_property_iterator grpc_auth_context_peer_identity(
       ctx, ctx->peer_identity_property_name);
 }
 
-grpc_auth_property grpc_auth_property_init_from_cstring(const char *name,
-                                                        const char *value) {
-  grpc_auth_property prop;
-  prop.name = gpr_strdup(name);
-  prop.value = gpr_strdup(value);
-  prop.value_length = strlen(value);
-  return prop;
+static void ensure_auth_context_capacity(grpc_auth_context *ctx) {
+  if (ctx->properties.count == ctx->properties.capacity) {
+    ctx->properties.capacity =
+        GPR_MAX(ctx->properties.capacity + 8, ctx->properties.capacity * 2);
+    ctx->properties.array =
+        gpr_realloc(ctx->properties.array,
+                    ctx->properties.capacity * sizeof(grpc_auth_property));
+  }
 }
 
-grpc_auth_property grpc_auth_property_init(const char *name, const char *value,
-                                           size_t value_length) {
-  grpc_auth_property prop;
-  prop.name = gpr_strdup(name);
-  prop.value = gpr_malloc(value_length + 1);
-  memcpy(prop.value, value, value_length);
-  prop.value[value_length] = '\0';
-  prop.value_length = value_length;
-  return prop;
+void grpc_auth_context_add_property(grpc_auth_context *ctx, const char *name,
+                                    const char *value, size_t value_length) {
+  grpc_auth_property *prop;
+  ensure_auth_context_capacity(ctx);
+  prop = &ctx->properties.array[ctx->properties.count++];
+  prop->name = gpr_strdup(name);
+  prop->value = gpr_malloc(value_length + 1);
+  memcpy(prop->value, value, value_length);
+  prop->value[value_length] = '\0';
+  prop->value_length = value_length;
+}
+
+void grpc_auth_context_add_cstring_property(grpc_auth_context *ctx,
+                                            const char *name,
+                                            const char *value) {
+  grpc_auth_property *prop;
+  ensure_auth_context_capacity(ctx);
+  prop = &ctx->properties.array[ctx->properties.count++];
+  prop->name = gpr_strdup(name);
+  prop->value = gpr_strdup(value);
+  prop->value_length = strlen(value);
 }
 
 void grpc_auth_property_reset(grpc_auth_property *property) {
@@ -255,3 +295,35 @@ void grpc_auth_property_reset(grpc_auth_property *property) {
   memset(property, 0, sizeof(grpc_auth_property));
 }
 
+grpc_arg grpc_auth_metadata_processor_to_arg(grpc_auth_metadata_processor *p) {
+  grpc_arg arg;
+  memset(&arg, 0, sizeof(grpc_arg));
+  arg.type = GRPC_ARG_POINTER;
+  arg.key = GRPC_AUTH_METADATA_PROCESSOR_ARG;
+  arg.value.pointer.p = p;
+  return arg;
+}
+
+grpc_auth_metadata_processor *grpc_auth_metadata_processor_from_arg(
+    const grpc_arg *arg) {
+  if (strcmp(arg->key, GRPC_AUTH_METADATA_PROCESSOR_ARG) != 0) return NULL;
+  if (arg->type != GRPC_ARG_POINTER) {
+    gpr_log(GPR_ERROR, "Invalid type %d for arg %s", arg->type,
+            GRPC_AUTH_METADATA_PROCESSOR_ARG);
+    return NULL;
+  }
+  return arg->value.pointer.p;
+}
+
+grpc_auth_metadata_processor *grpc_find_auth_metadata_processor_in_args(
+    const grpc_channel_args *args) {
+  size_t i;
+  if (args == NULL) return NULL;
+  for (i = 0; i < args->num_args; i++) {
+    grpc_auth_metadata_processor *p =
+        grpc_auth_metadata_processor_from_arg(&args->args[i]);
+    if (p != NULL) return p;
+  }
+  return NULL;
+}
+
diff --git a/src/core/security/security_context.h b/src/core/security/security_context.h
index 76a45910bbd..7fcd438cf6f 100644
--- a/src/core/security/security_context.h
+++ b/src/core/security/security_context.h
@@ -34,29 +34,31 @@
 #ifndef GRPC_INTERNAL_CORE_SECURITY_SECURITY_CONTEXT_H
 #define GRPC_INTERNAL_CORE_SECURITY_SECURITY_CONTEXT_H
 
+#include "src/core/iomgr/pollset.h"
 #include "src/core/security/credentials.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 /* --- grpc_auth_context ---
 
    High level authentication context object. Can optionally be chained. */
 
 /* Property names are always NULL terminated. */
 
+typedef struct {
+  grpc_auth_property *array;
+  size_t count;
+  size_t capacity;
+} grpc_auth_property_array;
+
 struct grpc_auth_context {
   struct grpc_auth_context *chained;
-  grpc_auth_property *properties;
-  size_t property_count;
+  grpc_auth_property_array properties;
   gpr_refcount refcount;
   const char *peer_identity_property_name;
+  grpc_pollset *pollset;
 };
 
-/* Constructor. */
-grpc_auth_context *grpc_auth_context_create(grpc_auth_context *chained,
-                                            size_t property_count);
+/* Creation. */
+grpc_auth_context *grpc_auth_context_create(grpc_auth_context *chained);
 
 /* Refcounting. */
 #ifdef GRPC_AUTH_CONTEXT_REFCOUNT_DEBUG
@@ -76,12 +78,6 @@ grpc_auth_context *grpc_auth_context_ref(grpc_auth_context *policy);
 void grpc_auth_context_unref(grpc_auth_context *policy);
 #endif
 
-grpc_auth_property grpc_auth_property_init_from_cstring(const char *name,
-                                                        const char *value);
-
-grpc_auth_property grpc_auth_property_init(const char *name, const char *value,
-                                           size_t value_length);
-
 void grpc_auth_property_reset(grpc_auth_property *property);
 
 /* --- grpc_client_security_context ---
@@ -107,9 +103,14 @@ typedef struct {
 grpc_server_security_context *grpc_server_security_context_create(void);
 void grpc_server_security_context_destroy(void *ctx);
 
-#ifdef __cplusplus
-}
-#endif
+/* --- Auth metadata processing. --- */
+#define GRPC_AUTH_METADATA_PROCESSOR_ARG "grpc.auth_metadata_processor"
+
+grpc_arg grpc_auth_metadata_processor_to_arg(grpc_auth_metadata_processor *p);
+grpc_auth_metadata_processor *grpc_auth_metadata_processor_from_arg(
+    const grpc_arg *arg);
+grpc_auth_metadata_processor *grpc_find_auth_metadata_processor_in_args(
+    const grpc_channel_args *args);
 
 #endif  /* GRPC_INTERNAL_CORE_SECURITY_SECURITY_CONTEXT_H */
 
diff --git a/src/core/security/server_auth_filter.c b/src/core/security/server_auth_filter.c
index 69789c2f0d9..2fc689caecd 100644
--- a/src/core/security/server_auth_filter.c
+++ b/src/core/security/server_auth_filter.c
@@ -31,20 +31,140 @@
  *
  */
 
+#include <string.h>
+
 #include "src/core/security/auth_filters.h"
 #include "src/core/security/security_connector.h"
 #include "src/core/security/security_context.h"
 
+#include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 
 typedef struct call_data {
-  int unused; /* C89 requires at least one struct element */
+  gpr_uint8 got_client_metadata;
+  grpc_stream_op_buffer *recv_ops;
+  /* Closure to call when finished with the auth_on_recv hook. */
+  grpc_iomgr_closure *on_done_recv;
+  /* Receive closures are chained: we inject this closure as the on_done_recv
+     up-call on transport_op, and remember to call our on_done_recv member after
+     handling it. */
+  grpc_iomgr_closure auth_on_recv;
+  grpc_transport_stream_op transport_op;
+  const grpc_metadata *consumed_md;
+  size_t num_consumed_md;
+  grpc_stream_op *md_op;
+  grpc_auth_context *auth_context;
 } call_data;
 
 typedef struct channel_data {
   grpc_security_connector *security_connector;
+  grpc_auth_metadata_processor processor;
+  grpc_mdctx *mdctx;
 } channel_data;
 
+static grpc_metadata_array metadata_batch_to_md_array(
+    const grpc_metadata_batch *batch) {
+  grpc_linked_mdelem *l;
+  grpc_metadata_array result;
+  grpc_metadata_array_init(&result);
+  for (l = batch->list.head; l != NULL; l = l->next) {
+    grpc_metadata *usr_md = NULL;
+    grpc_mdelem *md = l->md;
+    grpc_mdstr *key = md->key;
+    grpc_mdstr *value = md->value;
+    if (result.count == result.capacity) {
+      result.capacity = GPR_MAX(result.capacity + 8, result.capacity * 2);
+      result.metadata =
+          gpr_realloc(result.metadata, result.capacity * sizeof(grpc_metadata));
+    }
+    usr_md = &result.metadata[result.count++];
+    usr_md->key = grpc_mdstr_as_c_string(key);
+    usr_md->value = grpc_mdstr_as_c_string(value);
+    usr_md->value_length = GPR_SLICE_LENGTH(value->slice);
+  }
+  return result;
+}
+
+static grpc_mdelem *remove_consumed_md(void *user_data, grpc_mdelem *md) {
+  grpc_call_element *elem = user_data;
+  call_data *calld = elem->call_data;
+  size_t i;
+  for (i = 0; i < calld->num_consumed_md; i++) {
+    /* Maybe we could do a pointer comparison but we do not have any guarantee
+       that the metadata processor used the same pointers for consumed_md in the
+       callback. */
+    if (memcmp(GPR_SLICE_START_PTR(md->key->slice), calld->consumed_md[i].key,
+               GPR_SLICE_LENGTH(md->key->slice)) == 0 &&
+        memcmp(GPR_SLICE_START_PTR(md->value->slice),
+               calld->consumed_md[i].value,
+               GPR_SLICE_LENGTH(md->value->slice)) == 0) {
+      return NULL; /* Delete. */
+    }
+  }
+  return md;
+}
+
+static void on_md_processing_done(void *user_data,
+                                  const grpc_metadata *consumed_md,
+                                  size_t num_consumed_md, int success) {
+  grpc_call_element *elem = user_data;
+  call_data *calld = elem->call_data;
+
+  if (success) {
+    calld->consumed_md = consumed_md;
+    calld->num_consumed_md = num_consumed_md;
+    grpc_metadata_batch_filter(&calld->md_op->data.metadata, remove_consumed_md,
+                               elem);
+    calld->on_done_recv->cb(calld->on_done_recv->cb_arg, success);
+  } else {
+    gpr_slice message = gpr_slice_from_copied_string(
+        "Authentication metadata processing failed.");
+    grpc_sopb_reset(calld->recv_ops);
+    grpc_transport_stream_op_add_close(&calld->transport_op,
+                                       GRPC_STATUS_UNAUTHENTICATED, &message);
+    grpc_call_next_op(elem, &calld->transport_op);
+  }
+}
+
+static void auth_on_recv(void *user_data, int success) {
+  grpc_call_element *elem = user_data;
+  call_data *calld = elem->call_data;
+  channel_data *chand = elem->channel_data;
+  if (success) {
+    size_t i;
+    size_t nops = calld->recv_ops->nops;
+    grpc_stream_op *ops = calld->recv_ops->ops;
+    for (i = 0; i < nops; i++) {
+      grpc_metadata_array md_array;
+      grpc_stream_op *op = &ops[i];
+      if (op->type != GRPC_OP_METADATA || calld->got_client_metadata) continue;
+      calld->got_client_metadata = 1;
+      if (chand->processor.process == NULL) continue;
+      calld->md_op = op;
+      md_array = metadata_batch_to_md_array(&op->data.metadata);
+      chand->processor.process(chand->processor.state, calld->auth_context,
+                               md_array.metadata, md_array.count,
+                               on_md_processing_done, elem);
+      grpc_metadata_array_destroy(&md_array);
+      return;
+    }
+  }
+  calld->on_done_recv->cb(calld->on_done_recv->cb_arg, success);
+}
+
+static void set_recv_ops_md_callbacks(grpc_call_element *elem,
+                                      grpc_transport_stream_op *op) {
+  call_data *calld = elem->call_data;
+
+  if (op->recv_ops && !calld->got_client_metadata) {
+    /* substitute our callback for the higher callback */
+    calld->recv_ops = op->recv_ops;
+    calld->on_done_recv = op->on_done_recv;
+    op->on_done_recv = &calld->auth_on_recv;
+    calld->transport_op = *op;
+  }
+}
+
 /* Called either:
      - in response to an API call (or similar) from above, to send something
      - a network event (or similar) from below, to receive something
@@ -52,9 +172,7 @@ typedef struct channel_data {
    that is being sent or received. */
 static void auth_start_transport_op(grpc_call_element *elem,
                                     grpc_transport_stream_op *op) {
-  /* TODO(jboeuf): Get the metadata and get a new context from it. */
-
-  /* pass control down the stack */
+  set_recv_ops_md_callbacks(elem, op);
   grpc_call_next_op(elem, op);
 }
 
@@ -68,7 +186,8 @@ static void init_call_elem(grpc_call_element *elem,
   grpc_server_security_context *server_ctx = NULL;
 
   /* initialize members */
-  calld->unused = 0;
+  memset(calld, 0, sizeof(*calld));
+  grpc_iomgr_closure_init(&calld->auth_on_recv, auth_on_recv, elem);
 
   GPR_ASSERT(initial_op && initial_op->context != NULL &&
              initial_op->context[GRPC_CONTEXT_SECURITY].value == NULL);
@@ -80,21 +199,29 @@ static void init_call_elem(grpc_call_element *elem,
         initial_op->context[GRPC_CONTEXT_SECURITY].value);
   }
   server_ctx = grpc_server_security_context_create();
-  server_ctx->auth_context = GRPC_AUTH_CONTEXT_REF(
-      chand->security_connector->auth_context, "server_security_context");
+  server_ctx->auth_context =
+      grpc_auth_context_create(chand->security_connector->auth_context);
+  server_ctx->auth_context->pollset = initial_op->bind_pollset;
   initial_op->context[GRPC_CONTEXT_SECURITY].value = server_ctx;
   initial_op->context[GRPC_CONTEXT_SECURITY].destroy =
       grpc_server_security_context_destroy;
+  calld->auth_context = server_ctx->auth_context;
+
+  /* Set the metadata callbacks. */
+  set_recv_ops_md_callbacks(elem, initial_op);
 }
 
 /* Destructor for call_data */
-static void destroy_call_elem(grpc_call_element *elem) {}
+static void destroy_call_elem(grpc_call_element *elem) {
+}
 
 /* Constructor for channel_data */
 static void init_channel_elem(grpc_channel_element *elem, grpc_channel *master,
                               const grpc_channel_args *args, grpc_mdctx *mdctx,
                               int is_first, int is_last) {
   grpc_security_connector *sc = grpc_find_security_connector_in_args(args);
+  grpc_auth_metadata_processor *processor =
+      grpc_find_auth_metadata_processor_in_args(args);
   /* grab pointers to our data from the channel element */
   channel_data *chand = elem->channel_data;
 
@@ -104,11 +231,14 @@ static void init_channel_elem(grpc_channel_element *elem, grpc_channel *master,
   GPR_ASSERT(!is_first);
   GPR_ASSERT(!is_last);
   GPR_ASSERT(sc != NULL);
+  GPR_ASSERT(processor != NULL);
 
   /* initialize members */
   GPR_ASSERT(!sc->is_client_side);
   chand->security_connector =
       GRPC_SECURITY_CONNECTOR_REF(sc, "server_auth_filter");
+  chand->mdctx = mdctx;
+  chand->processor = *processor;
 }
 
 /* Destructor for channel data */
diff --git a/src/core/security/server_secure_chttp2.c b/src/core/security/server_secure_chttp2.c
index 3717b8989f4..8d9d036d808 100644
--- a/src/core/security/server_secure_chttp2.c
+++ b/src/core/security/server_secure_chttp2.c
@@ -43,6 +43,7 @@
 #include "src/core/security/auth_filters.h"
 #include "src/core/security/credentials.h"
 #include "src/core/security/security_connector.h"
+#include "src/core/security/security_context.h"
 #include "src/core/security/secure_transport_setup.h"
 #include "src/core/surface/server.h"
 #include "src/core/transport/chttp2_transport.h"
@@ -60,6 +61,7 @@ typedef struct grpc_server_secure_state {
   grpc_server *server;
   grpc_tcp_server *tcp;
   grpc_security_connector *sc;
+  grpc_auth_metadata_processor processor;
   tcp_endpoint_list *handshaking_tcp_endpoints;
   int is_shutdown;
   gpr_mu mu;
@@ -86,9 +88,13 @@ static void setup_transport(void *statep, grpc_transport *transport,
   static grpc_channel_filter const *extra_filters[] = {
       &grpc_server_auth_filter, &grpc_http_server_filter};
   grpc_server_secure_state *state = statep;
-  grpc_arg connector_arg = grpc_security_connector_to_arg(state->sc);
-  grpc_channel_args *args_copy = grpc_channel_args_copy_and_add(
-      grpc_server_get_channel_args(state->server), &connector_arg, 1);
+  grpc_channel_args *args_copy;
+  grpc_arg args_to_add[2];
+  args_to_add[0] = grpc_security_connector_to_arg(state->sc);
+  args_to_add[1] = grpc_auth_metadata_processor_to_arg(&state->processor);
+  args_copy = grpc_channel_args_copy_and_add(
+      grpc_server_get_channel_args(state->server), args_to_add,
+      GPR_ARRAY_SIZE(args_to_add));
   grpc_server_setup_transport(state->server, transport, extra_filters,
                               GPR_ARRAY_SIZE(extra_filters), mdctx, args_copy);
   grpc_channel_args_destroy(args_copy);
@@ -252,9 +258,11 @@ int grpc_server_add_secure_http2_port(grpc_server *server, const char *addr,
   grpc_resolved_addresses_destroy(resolved);
 
   state = gpr_malloc(sizeof(*state));
+  memset(state, 0, sizeof(*state));
   state->server = server;
   state->tcp = tcp;
   state->sc = sc;
+  state->processor = creds->processor;
   state->handshaking_tcp_endpoints = NULL;
   state->is_shutdown = 0;
   gpr_mu_init(&state->mu);
diff --git a/src/core/transport/chttp2/internal.h b/src/core/transport/chttp2/internal.h
index cb428f8e3c9..42cf0ecd5be 100644
--- a/src/core/transport/chttp2/internal.h
+++ b/src/core/transport/chttp2/internal.h
@@ -388,6 +388,8 @@ typedef struct {
   gpr_uint8 in_stream_map;
   /** bitmask of GRPC_CHTTP2_WRITING_xxx above */
   gpr_uint8 writing_now;
+  /** has anything been written to this stream? */
+  gpr_uint8 written_anything;
 
   /** stream state already published to the upper layer */
   grpc_stream_state published_state;
diff --git a/src/core/transport/chttp2_transport.c b/src/core/transport/chttp2_transport.c
index 6ba144faa43..a9f91b64d57 100644
--- a/src/core/transport/chttp2_transport.c
+++ b/src/core/transport/chttp2_transport.c
@@ -107,6 +107,11 @@ static void cancel_from_api(grpc_chttp2_transport_global *transport_global,
                             grpc_chttp2_stream_global *stream_global,
                             grpc_status_code status);
 
+static void close_from_api(grpc_chttp2_transport_global *transport_global,
+                           grpc_chttp2_stream_global *stream_global,
+                           grpc_status_code status,
+                           gpr_slice *optional_message);
+
 /** Add endpoint from this transport to pollset */
 static void add_to_pollset_locked(grpc_chttp2_transport *t,
                                   grpc_pollset *pollset);
@@ -602,10 +607,16 @@ static void perform_stream_op_locked(
     cancel_from_api(transport_global, stream_global, op->cancel_with_status);
   }
 
+  if (op->close_with_status != GRPC_STATUS_OK) {
+    close_from_api(transport_global, stream_global, op->close_with_status,
+                   op->optional_close_message);
+  }
+
   if (op->send_ops) {
     GPR_ASSERT(stream_global->outgoing_sopb == NULL);
     stream_global->send_done_closure = op->on_done_send;
     if (!stream_global->cancelled) {
+      stream_global->written_anything = 1;
       stream_global->outgoing_sopb = op->send_ops;
       if (op->is_last_send &&
           stream_global->write_state == GRPC_WRITE_STATE_OPEN) {
@@ -900,6 +911,108 @@ static void cancel_from_api(grpc_chttp2_transport_global *transport_global,
                                                 stream_global);
 }
 
+static void close_from_api(grpc_chttp2_transport_global *transport_global,
+                           grpc_chttp2_stream_global *stream_global,
+                           grpc_status_code status,
+                           gpr_slice *optional_message) {
+  gpr_slice hdr;
+  gpr_slice status_hdr;
+  gpr_slice message_pfx;
+  gpr_uint8 *p;
+  gpr_uint32 len = 0;
+
+  GPR_ASSERT(status >= 0 && (int)status < 100);
+
+  stream_global->cancelled = 1;
+  stream_global->cancelled_status = status;
+  GPR_ASSERT(stream_global->id != 0);
+  GPR_ASSERT(!stream_global->written_anything);
+
+  /* Hand roll a header block.
+     This is unnecessarily ugly - at some point we should find a more elegant
+     solution.
+     It's complicated by the fact that our send machinery would be dead by the
+     time we got around to sending this, so instead we ignore HPACK compression
+     and just write the uncompressed bytes onto the wire. */
+  status_hdr = gpr_slice_malloc(15 + (status >= 10));
+  p = GPR_SLICE_START_PTR(status_hdr);
+  *p++ = 0x40; /* literal header */
+  *p++ = 11;   /* len(grpc-status) */
+  *p++ = 'g';
+  *p++ = 'r';
+  *p++ = 'p';
+  *p++ = 'c';
+  *p++ = '-';
+  *p++ = 's';
+  *p++ = 't';
+  *p++ = 'a';
+  *p++ = 't';
+  *p++ = 'u';
+  *p++ = 's';
+  if (status < 10) {
+    *p++ = 1;
+    *p++ = '0' + status;
+  } else {
+    *p++ = 2;
+    *p++ = '0' + (status / 10);
+    *p++ = '0' + (status % 10);
+  }
+  GPR_ASSERT(p == GPR_SLICE_END_PTR(status_hdr));
+  len += GPR_SLICE_LENGTH(status_hdr);
+
+  if (optional_message) {
+    GPR_ASSERT(GPR_SLICE_LENGTH(*optional_message) < 127);
+    message_pfx = gpr_slice_malloc(15);
+    p = GPR_SLICE_START_PTR(message_pfx);
+    *p++ = 0x40;
+    *p++ = 12; /* len(grpc-message) */
+    *p++ = 'g';
+    *p++ = 'r';
+    *p++ = 'p';
+    *p++ = 'c';
+    *p++ = '-';
+    *p++ = 'm';
+    *p++ = 'e';
+    *p++ = 's';
+    *p++ = 's';
+    *p++ = 'a';
+    *p++ = 'g';
+    *p++ = 'e';
+    *p++ = GPR_SLICE_LENGTH(*optional_message);
+    GPR_ASSERT(p == GPR_SLICE_END_PTR(message_pfx));
+    len += GPR_SLICE_LENGTH(message_pfx);
+    len += GPR_SLICE_LENGTH(*optional_message);
+  }
+
+  hdr = gpr_slice_malloc(9);
+  p = GPR_SLICE_START_PTR(hdr);
+  *p++ = len >> 16;
+  *p++ = len >> 8;
+  *p++ = len;
+  *p++ = GRPC_CHTTP2_FRAME_HEADER;
+  *p++ = GRPC_CHTTP2_DATA_FLAG_END_STREAM | GRPC_CHTTP2_DATA_FLAG_END_HEADERS;
+  *p++ = stream_global->id >> 24;
+  *p++ = stream_global->id >> 16;
+  *p++ = stream_global->id >> 8;
+  *p++ = stream_global->id;
+  GPR_ASSERT(p == GPR_SLICE_END_PTR(hdr));
+
+  gpr_slice_buffer_add(&transport_global->qbuf, hdr);
+  gpr_slice_buffer_add(&transport_global->qbuf, status_hdr);
+  if (optional_message) {
+    gpr_slice_buffer_add(&transport_global->qbuf, message_pfx);
+    gpr_slice_buffer_add(&transport_global->qbuf,
+                         gpr_slice_ref(*optional_message));
+  }
+
+  gpr_slice_buffer_add(
+      &transport_global->qbuf,
+      grpc_chttp2_rst_stream_create(stream_global->id, GRPC_CHTTP2_NO_ERROR));
+
+  grpc_chttp2_list_add_read_write_state_changed(transport_global,
+                                                stream_global);
+}
+
 static void cancel_stream_cb(grpc_chttp2_transport_global *transport_global,
                              void *user_data,
                              grpc_chttp2_stream_global *stream_global) {
diff --git a/src/core/transport/metadata.c b/src/core/transport/metadata.c
index 967fd4898c5..44d32b6cb2b 100644
--- a/src/core/transport/metadata.c
+++ b/src/core/transport/metadata.c
@@ -135,7 +135,9 @@ static void unlock(grpc_mdctx *ctx) {
   if (ctx->refs == 0) {
     /* uncomment if you're having trouble diagnosing an mdelem leak to make
        things clearer (slows down destruction a lot, however) */
+#ifdef GRPC_METADATA_REFCOUNT_DEBUG
     gc_mdtab(ctx);
+#endif
     if (ctx->mdtab_count && ctx->mdtab_count == ctx->mdtab_free) {
       discard_metadata(ctx);
     }
diff --git a/src/core/transport/stream_op.h b/src/core/transport/stream_op.h
index f27ef1b66b3..227320cf2a8 100644
--- a/src/core/transport/stream_op.h
+++ b/src/core/transport/stream_op.h
@@ -108,7 +108,7 @@ void grpc_metadata_batch_move(grpc_metadata_batch *dst,
                               grpc_metadata_batch *src);
 
 /** Add \a storage to the beginning of \a batch. storage->md is
-    assumed to be valid. 
+    assumed to be valid.
     \a storage is owned by the caller and must survive for the
     lifetime of batch. This usually means it should be around
     for the lifetime of the call. */
diff --git a/src/core/transport/transport.c b/src/core/transport/transport.c
index 69c00b6a4fd..c0d92cf93f6 100644
--- a/src/core/transport/transport.c
+++ b/src/core/transport/transport.c
@@ -32,6 +32,8 @@
  */
 
 #include "src/core/transport/transport.h"
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
 #include "src/core/transport/transport_impl.h"
 
 size_t grpc_transport_stream_size(grpc_transport *transport) {
@@ -83,12 +85,54 @@ void grpc_transport_stream_op_finish_with_failure(
 }
 
 void grpc_transport_stream_op_add_cancellation(grpc_transport_stream_op *op,
-                                               grpc_status_code status,
-                                               grpc_mdstr *message) {
+                                               grpc_status_code status) {
+  GPR_ASSERT(status != GRPC_STATUS_OK);
   if (op->cancel_with_status == GRPC_STATUS_OK) {
     op->cancel_with_status = status;
   }
-  if (message) {
-    GRPC_MDSTR_UNREF(message);
+  if (op->close_with_status != GRPC_STATUS_OK) {
+    op->close_with_status = GRPC_STATUS_OK;
+    if (op->optional_close_message != NULL) {
+      gpr_slice_unref(*op->optional_close_message);
+      op->optional_close_message = NULL;
+    }
   }
 }
+
+typedef struct {
+  gpr_slice message;
+  grpc_iomgr_closure *then_call;
+  grpc_iomgr_closure closure;
+} close_message_data;
+
+static void free_message(void *p, int iomgr_success) {
+  close_message_data *cmd = p;
+  gpr_slice_unref(cmd->message);
+  if (cmd->then_call != NULL) {
+    cmd->then_call->cb(cmd->then_call->cb_arg, iomgr_success);
+  }
+  gpr_free(cmd);
+}
+
+void grpc_transport_stream_op_add_close(grpc_transport_stream_op *op,
+                                        grpc_status_code status,
+                                        gpr_slice *optional_message) {
+  close_message_data *cmd;
+  GPR_ASSERT(status != GRPC_STATUS_OK);
+  if (op->cancel_with_status != GRPC_STATUS_OK ||
+      op->close_with_status != GRPC_STATUS_OK) {
+    if (optional_message) {
+      gpr_slice_unref(*optional_message);
+    }
+    return;
+  }
+  if (optional_message) {
+    cmd = gpr_malloc(sizeof(*cmd));
+    cmd->message = *optional_message;
+    cmd->then_call = op->on_consumed;
+    grpc_iomgr_closure_init(&cmd->closure, free_message, cmd);
+    op->on_consumed = &cmd->closure;
+    op->optional_close_message = &cmd->message;
+  }
+  op->close_with_status = status;
+}
diff --git a/src/core/transport/transport.h b/src/core/transport/transport.h
index 7efcfcf970c..92c1f38c5ea 100644
--- a/src/core/transport/transport.h
+++ b/src/core/transport/transport.h
@@ -80,8 +80,14 @@ typedef struct grpc_transport_stream_op {
 
   grpc_pollset *bind_pollset;
 
+  /** If != GRPC_STATUS_OK, cancel this stream */
   grpc_status_code cancel_with_status;
 
+  /** If != GRPC_STATUS_OK, send grpc-status, grpc-message, and close this
+      stream for both reading and writing */
+  grpc_status_code close_with_status;
+  gpr_slice *optional_close_message;
+
   /* Indexes correspond to grpc_context_index enum values */
   grpc_call_context_element *context;
 } grpc_transport_stream_op;
@@ -148,8 +154,11 @@ void grpc_transport_destroy_stream(grpc_transport *transport,
 void grpc_transport_stream_op_finish_with_failure(grpc_transport_stream_op *op);
 
 void grpc_transport_stream_op_add_cancellation(grpc_transport_stream_op *op,
-                                               grpc_status_code status,
-                                               grpc_mdstr *message);
+                                               grpc_status_code status);
+
+void grpc_transport_stream_op_add_close(grpc_transport_stream_op *op,
+                                        grpc_status_code status,
+                                        gpr_slice *optional_message);
 
 char *grpc_transport_stream_op_string(grpc_transport_stream_op *op);
 
diff --git a/test/core/end2end/end2end_tests.h b/test/core/end2end/end2end_tests.h
index a18c7029514..3f1665613c6 100644
--- a/test/core/end2end/end2end_tests.h
+++ b/test/core/end2end/end2end_tests.h
@@ -43,6 +43,8 @@ typedef struct grpc_end2end_test_config grpc_end2end_test_config;
 #define FEATURE_MASK_SUPPORTS_HOSTNAME_VERIFICATION 2
 #define FEATURE_MASK_SUPPORTS_PER_CALL_CREDENTIALS 4
 
+#define FAIL_AUTH_CHECK_SERVER_ARG_NAME "fail_auth_check"
+
 struct grpc_end2end_test_fixture {
   grpc_completion_queue *cq;
   grpc_server *server;
diff --git a/test/core/end2end/fixtures/chttp2_fake_security.c b/test/core/end2end/fixtures/chttp2_fake_security.c
index f879b43f794..78b692a45dd 100644
--- a/test/core/end2end/fixtures/chttp2_fake_security.c
+++ b/test/core/end2end/fixtures/chttp2_fake_security.c
@@ -65,6 +65,14 @@ static grpc_end2end_test_fixture chttp2_create_fixture_secure_fullstack(
   return f;
 }
 
+static void process_auth_failure(void *state, grpc_auth_context *ctx,
+                                 const grpc_metadata *md, size_t md_count,
+                                 grpc_process_auth_metadata_done_cb cb,
+                                 void *user_data) {
+  GPR_ASSERT(state == NULL);
+  cb(user_data, NULL, 0, 0);
+}
+
 static void chttp2_init_client_secure_fullstack(grpc_end2end_test_fixture *f,
                                                 grpc_channel_args *client_args,
                                                 grpc_credentials *creds) {
@@ -102,10 +110,27 @@ static void chttp2_init_client_fake_secure_fullstack(
   chttp2_init_client_secure_fullstack(f, client_args, fake_ts_creds);
 }
 
+static int fail_server_auth_check(grpc_channel_args *server_args) {
+  size_t i;
+  if (server_args == NULL) return 0;
+  for (i = 0; i < server_args->num_args; i++) {
+    if (strcmp(server_args->args[i].key, FAIL_AUTH_CHECK_SERVER_ARG_NAME) ==
+        0) {
+      return 1;
+    }
+  }
+  return 0;
+}
+
 static void chttp2_init_server_fake_secure_fullstack(
     grpc_end2end_test_fixture *f, grpc_channel_args *server_args) {
   grpc_server_credentials *fake_ts_creds =
       grpc_fake_transport_security_server_credentials_create();
+  if (fail_server_auth_check(server_args)) {
+    grpc_auth_metadata_processor processor = {process_auth_failure, NULL};
+    grpc_server_credentials_set_auth_metadata_processor(fake_ts_creds,
+                                                        processor);
+  }
   chttp2_init_server_secure_fullstack(f, server_args, fake_ts_creds);
 }
 
diff --git a/test/core/end2end/fixtures/chttp2_simple_ssl_fullstack.c b/test/core/end2end/fixtures/chttp2_simple_ssl_fullstack.c
index 6d5669d05a8..9850aac69b0 100644
--- a/test/core/end2end/fixtures/chttp2_simple_ssl_fullstack.c
+++ b/test/core/end2end/fixtures/chttp2_simple_ssl_fullstack.c
@@ -68,6 +68,14 @@ static grpc_end2end_test_fixture chttp2_create_fixture_secure_fullstack(
   return f;
 }
 
+static void process_auth_failure(void *state, grpc_auth_context *ctx,
+                                 const grpc_metadata *md, size_t md_count,
+                                 grpc_process_auth_metadata_done_cb cb,
+                                 void *user_data) {
+  GPR_ASSERT(state == NULL);
+  cb(user_data, NULL, 0, 0);
+}
+
 static void chttp2_init_client_secure_fullstack(grpc_end2end_test_fixture *f,
                                                 grpc_channel_args *client_args,
                                                 grpc_credentials *creds) {
@@ -110,12 +118,28 @@ static void chttp2_init_client_simple_ssl_secure_fullstack(
   grpc_channel_args_destroy(new_client_args);
 }
 
+static int fail_server_auth_check(grpc_channel_args *server_args) {
+  size_t i;
+  if (server_args == NULL) return 0;
+  for (i = 0; i < server_args->num_args; i++) {
+    if (strcmp(server_args->args[i].key, FAIL_AUTH_CHECK_SERVER_ARG_NAME) ==
+        0) {
+      return 1;
+    }
+  }
+  return 0;
+}
+
 static void chttp2_init_server_simple_ssl_secure_fullstack(
     grpc_end2end_test_fixture *f, grpc_channel_args *server_args) {
   grpc_ssl_pem_key_cert_pair pem_cert_key_pair = {test_server1_key,
                                                   test_server1_cert};
   grpc_server_credentials *ssl_creds =
       grpc_ssl_server_credentials_create(NULL, &pem_cert_key_pair, 1, 0);
+  if (fail_server_auth_check(server_args)) {
+    grpc_auth_metadata_processor processor = {process_auth_failure, NULL};
+    grpc_server_credentials_set_auth_metadata_processor(ssl_creds, processor);
+  }
   chttp2_init_server_secure_fullstack(f, server_args, ssl_creds);
 }
 
diff --git a/test/core/end2end/fixtures/chttp2_simple_ssl_fullstack_with_poll.c b/test/core/end2end/fixtures/chttp2_simple_ssl_fullstack_with_poll.c
index d0cc3dd74a2..3df2acd296b 100644
--- a/test/core/end2end/fixtures/chttp2_simple_ssl_fullstack_with_poll.c
+++ b/test/core/end2end/fixtures/chttp2_simple_ssl_fullstack_with_poll.c
@@ -68,6 +68,14 @@ static grpc_end2end_test_fixture chttp2_create_fixture_secure_fullstack(
   return f;
 }
 
+static void process_auth_failure(void *state, grpc_auth_context *ctx,
+                                 const grpc_metadata *md, size_t md_count,
+                                 grpc_process_auth_metadata_done_cb cb,
+                                 void *user_data) {
+  GPR_ASSERT(state == NULL);
+  cb(user_data, NULL, 0, 0);
+}
+
 static void chttp2_init_client_secure_fullstack(grpc_end2end_test_fixture *f,
                                                 grpc_channel_args *client_args,
                                                 grpc_credentials *creds) {
@@ -110,12 +118,28 @@ static void chttp2_init_client_simple_ssl_secure_fullstack(
   grpc_channel_args_destroy(new_client_args);
 }
 
+static int fail_server_auth_check(grpc_channel_args *server_args) {
+  size_t i;
+  if (server_args == NULL) return 0;
+  for (i = 0; i < server_args->num_args; i++) {
+    if (strcmp(server_args->args[i].key, FAIL_AUTH_CHECK_SERVER_ARG_NAME) ==
+        0) {
+      return 1;
+    }
+  }
+  return 0;
+}
+
 static void chttp2_init_server_simple_ssl_secure_fullstack(
     grpc_end2end_test_fixture *f, grpc_channel_args *server_args) {
   grpc_ssl_pem_key_cert_pair pem_cert_key_pair = {test_server1_key,
                                                   test_server1_cert};
   grpc_server_credentials *ssl_creds =
       grpc_ssl_server_credentials_create(NULL, &pem_cert_key_pair, 1, 0);
+  if (fail_server_auth_check(server_args)) {
+    grpc_auth_metadata_processor processor = {process_auth_failure, NULL};
+    grpc_server_credentials_set_auth_metadata_processor(ssl_creds, processor);
+  }
   chttp2_init_server_secure_fullstack(f, server_args, ssl_creds);
 }
 
diff --git a/test/core/end2end/fixtures/chttp2_simple_ssl_fullstack_with_proxy.c b/test/core/end2end/fixtures/chttp2_simple_ssl_fullstack_with_proxy.c
index 46a64de6c50..4d77039cac1 100644
--- a/test/core/end2end/fixtures/chttp2_simple_ssl_fullstack_with_proxy.c
+++ b/test/core/end2end/fixtures/chttp2_simple_ssl_fullstack_with_proxy.c
@@ -96,6 +96,14 @@ static grpc_end2end_test_fixture chttp2_create_fixture_secure_fullstack(
   return f;
 }
 
+static void process_auth_failure(void *state, grpc_auth_context *ctx,
+                                 const grpc_metadata *md, size_t md_count,
+                                 grpc_process_auth_metadata_done_cb cb,
+                                 void *user_data) {
+  GPR_ASSERT(state == NULL);
+  cb(user_data, NULL, 0, 0);
+}
+
 static void chttp2_init_client_secure_fullstack(grpc_end2end_test_fixture *f,
                                                 grpc_channel_args *client_args,
                                                 grpc_credentials *creds) {
@@ -139,12 +147,28 @@ static void chttp2_init_client_simple_ssl_secure_fullstack(
   grpc_channel_args_destroy(new_client_args);
 }
 
+static int fail_server_auth_check(grpc_channel_args *server_args) {
+  size_t i;
+  if (server_args == NULL) return 0;
+  for (i = 0; i < server_args->num_args; i++) {
+    if (strcmp(server_args->args[i].key, FAIL_AUTH_CHECK_SERVER_ARG_NAME) ==
+        0) {
+      return 1;
+    }
+  }
+  return 0;
+}
+
 static void chttp2_init_server_simple_ssl_secure_fullstack(
     grpc_end2end_test_fixture *f, grpc_channel_args *server_args) {
   grpc_ssl_pem_key_cert_pair pem_cert_key_pair = {test_server1_key,
                                                   test_server1_cert};
   grpc_server_credentials *ssl_creds =
       grpc_ssl_server_credentials_create(NULL, &pem_cert_key_pair, 1, 0);
+  if (fail_server_auth_check(server_args)) {
+    grpc_auth_metadata_processor processor = {process_auth_failure, NULL};
+    grpc_server_credentials_set_auth_metadata_processor(ssl_creds, processor);
+  }
   chttp2_init_server_secure_fullstack(f, server_args, ssl_creds);
 }
 
diff --git a/test/core/end2end/fixtures/chttp2_simple_ssl_with_oauth2_fullstack.c b/test/core/end2end/fixtures/chttp2_simple_ssl_with_oauth2_fullstack.c
index f74ed9365f7..284d5f07ae9 100644
--- a/test/core/end2end/fixtures/chttp2_simple_ssl_with_oauth2_fullstack.c
+++ b/test/core/end2end/fixtures/chttp2_simple_ssl_with_oauth2_fullstack.c
@@ -46,10 +46,54 @@
 #include "test/core/util/port.h"
 #include "test/core/end2end/data/ssl_test_data.h"
 
+static const char oauth2_md[] = "Bearer aaslkfjs424535asdf";
+static const char *client_identity_property_name = "smurf_name";
+static const char *client_identity = "Brainy Smurf";
+
 typedef struct fullstack_secure_fixture_data {
   char *localaddr;
 } fullstack_secure_fixture_data;
 
+static const grpc_metadata *find_metadata(const grpc_metadata *md,
+                                          size_t md_count,
+                                          const char *key,
+                                          const char *value) {
+  size_t i;
+  for (i = 0; i < md_count; i++) {
+    if (strcmp(key, md[i].key) == 0 && strlen(value) == md[i].value_length &&
+        memcmp(md[i].value, value, md[i].value_length) == 0) {
+      return &md[i];
+    }
+  }
+  return NULL;
+}
+
+static void process_oauth2_success(void *state, grpc_auth_context *ctx,
+                                   const grpc_metadata *md, size_t md_count,
+                                   grpc_process_auth_metadata_done_cb cb,
+                                   void *user_data) {
+  const grpc_metadata *oauth2 =
+      find_metadata(md, md_count, "Authorization", oauth2_md);
+  GPR_ASSERT(state == NULL);
+  GPR_ASSERT(oauth2 != NULL);
+  grpc_auth_context_add_cstring_property(ctx, client_identity_property_name,
+                                         client_identity);
+  GPR_ASSERT(grpc_auth_context_set_peer_identity_property_name(
+                 ctx, client_identity_property_name) == 1);
+  cb(user_data, oauth2, 1, 1);
+}
+
+static void process_oauth2_failure(void *state, grpc_auth_context *ctx,
+                                   const grpc_metadata *md, size_t md_count,
+                                   grpc_process_auth_metadata_done_cb cb,
+                                   void *user_data) {
+  const grpc_metadata *oauth2 =
+      find_metadata(md, md_count, "Authorization", oauth2_md);
+  GPR_ASSERT(state == NULL);
+  GPR_ASSERT(oauth2 != NULL);
+  cb(user_data, oauth2, 1, 0);
+}
+
 static grpc_end2end_test_fixture chttp2_create_fixture_secure_fullstack(
     grpc_channel_args *client_args, grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
@@ -101,7 +145,7 @@ static void chttp2_init_client_simple_ssl_with_oauth2_secure_fullstack(
   grpc_credentials *ssl_creds =
       grpc_ssl_credentials_create(test_root_cert, NULL);
   grpc_credentials *oauth2_creds =
-      grpc_fake_oauth2_credentials_create("Bearer aaslkfjs424535asdf", 1);
+      grpc_md_only_test_credentials_create("Authorization", oauth2_md, 1);
   grpc_credentials *ssl_oauth2_creds =
       grpc_composite_credentials_create(ssl_creds, oauth2_creds);
   grpc_arg ssl_name_override = {GRPC_ARG_STRING,
@@ -115,12 +159,32 @@ static void chttp2_init_client_simple_ssl_with_oauth2_secure_fullstack(
   grpc_credentials_release(oauth2_creds);
 }
 
+static int fail_server_auth_check(grpc_channel_args *server_args) {
+  size_t i;
+  if (server_args == NULL) return 0;
+  for (i = 0; i < server_args->num_args; i++) {
+    if (strcmp(server_args->args[i].key, FAIL_AUTH_CHECK_SERVER_ARG_NAME) ==
+        0) {
+      return 1;
+    }
+  }
+  return 0;
+}
+
 static void chttp2_init_server_simple_ssl_secure_fullstack(
     grpc_end2end_test_fixture *f, grpc_channel_args *server_args) {
   grpc_ssl_pem_key_cert_pair pem_key_cert_pair = {test_server1_key,
                                                   test_server1_cert};
   grpc_server_credentials *ssl_creds =
       grpc_ssl_server_credentials_create(NULL, &pem_key_cert_pair, 1, 0);
+  grpc_auth_metadata_processor processor;
+  processor.state = NULL;
+  if (fail_server_auth_check(server_args)) {
+    processor.process = process_oauth2_failure;
+  } else {
+    processor.process = process_oauth2_success;
+  }
+  grpc_server_credentials_set_auth_metadata_processor(ssl_creds, processor);
   chttp2_init_server_secure_fullstack(f, server_args, ssl_creds);
 }
 
diff --git a/test/core/end2end/tests/request_response_with_payload_and_call_creds.c b/test/core/end2end/tests/request_response_with_payload_and_call_creds.c
index ba312d0d5c5..342dfa03f6b 100644
--- a/test/core/end2end/tests/request_response_with_payload_and_call_creds.c
+++ b/test/core/end2end/tests/request_response_with_payload_and_call_creds.c
@@ -59,13 +59,21 @@ static void *tag(gpr_intptr t) { return (void *)t; }
 
 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             const char *test_name,
-                                            grpc_channel_args *client_args,
-                                            grpc_channel_args *server_args) {
+                                            int fail_server_auth_check) {
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
-  f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
-  config.init_server(&f, server_args);
+  f = config.create_fixture(NULL, NULL);
+  config.init_client(&f, NULL);
+  if (fail_server_auth_check) {
+    grpc_arg fail_auth_arg = {
+        GRPC_ARG_STRING, FAIL_AUTH_CHECK_SERVER_ARG_NAME, {NULL}};
+    grpc_channel_args args;
+    args.num_args= 1;
+    args.args = &fail_auth_arg;
+    config.init_server(&f, &args);
+  } else {
+    config.init_server(&f, NULL);
+  }
   return f;
 }
 
@@ -128,7 +136,7 @@ static void test_call_creds_failure(grpc_end2end_test_config config) {
   grpc_call *c;
   grpc_credentials *creds = NULL;
   grpc_end2end_test_fixture f =
-      begin_test(config, "test_call_creds_failure", NULL, NULL);
+      begin_test(config, "test_call_creds_failure", 0);
   gpr_timespec deadline = five_seconds_time();
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
                                "/foo", "foo.test.google.fr", deadline);
@@ -157,9 +165,8 @@ static void request_response_with_payload_and_call_creds(
   grpc_byte_buffer *response_payload =
       grpc_raw_byte_buffer_create(&response_payload_slice, 1);
   gpr_timespec deadline = five_seconds_time();
-
-  grpc_end2end_test_fixture f = begin_test(config, test_name, NULL, NULL);
-  cq_verifier *cqv = cq_verifier_create(f.cq);
+  grpc_end2end_test_fixture f;
+  cq_verifier *cqv;
   grpc_op ops[6];
   grpc_op *op;
   grpc_metadata_array initial_metadata_recv;
@@ -174,6 +181,10 @@ static void request_response_with_payload_and_call_creds(
   int was_cancelled = 2;
   grpc_credentials *creds = NULL;
   grpc_auth_context *s_auth_context = NULL;
+  grpc_auth_context *c_auth_context = NULL;
+
+  f = begin_test(config, test_name, 0);
+  cqv = cq_verifier_create(f.cq);
 
   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
                                "/foo", "foo.test.google.fr", deadline);
@@ -241,6 +252,11 @@ static void request_response_with_payload_and_call_creds(
   print_auth_context(0, s_auth_context);
   grpc_auth_context_release(s_auth_context);
 
+  c_auth_context = grpc_call_auth_context(c);
+  GPR_ASSERT(c_auth_context != NULL);
+  print_auth_context(1, c_auth_context);
+  grpc_auth_context_release(c_auth_context);
+
   /* Cannot set creds on the server call object. */
   GPR_ASSERT(grpc_call_set_credentials(s, NULL) != GRPC_CALL_OK);
 
@@ -340,31 +356,120 @@ static void request_response_with_payload_and_call_creds(
   config.tear_down_data(&f);
 }
 
-void test_request_response_with_payload_and_call_creds(
+static void test_request_response_with_payload_and_call_creds(
     grpc_end2end_test_config config) {
   request_response_with_payload_and_call_creds(
       "test_request_response_with_payload_and_call_creds", config, NONE);
 }
 
-void test_request_response_with_payload_and_overridden_call_creds(
+static void test_request_response_with_payload_and_overridden_call_creds(
     grpc_end2end_test_config config) {
   request_response_with_payload_and_call_creds(
       "test_request_response_with_payload_and_overridden_call_creds", config,
       OVERRIDE);
 }
 
-void test_request_response_with_payload_and_deleted_call_creds(
+static void test_request_response_with_payload_and_deleted_call_creds(
     grpc_end2end_test_config config) {
   request_response_with_payload_and_call_creds(
       "test_request_response_with_payload_and_deleted_call_creds", config,
       DESTROY);
 }
 
+static void test_request_with_server_rejecting_client_creds(
+    grpc_end2end_test_config config) {
+  grpc_op ops[6];
+  grpc_op *op;
+  grpc_call *c;
+  grpc_end2end_test_fixture f;
+  gpr_timespec deadline = five_seconds_time();
+  cq_verifier *cqv;
+  grpc_metadata_array initial_metadata_recv;
+  grpc_metadata_array trailing_metadata_recv;
+  grpc_metadata_array request_metadata_recv;
+  grpc_call_details call_details;
+  grpc_status_code status;
+  char *details = NULL;
+  size_t details_capacity = 0;
+  grpc_byte_buffer *response_payload_recv = NULL;
+  gpr_slice request_payload_slice = gpr_slice_from_copied_string("hello world");
+  grpc_byte_buffer *request_payload =
+      grpc_raw_byte_buffer_create(&request_payload_slice, 1);
+  grpc_credentials *creds;
+
+  f = begin_test(config, "test_request_with_server_rejecting_client_creds", 1);
+  cqv = cq_verifier_create(f.cq);
+
+  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+                               "/foo", "foo.test.google.fr", deadline);
+  GPR_ASSERT(c);
+
+  creds = grpc_iam_credentials_create(iam_token, iam_selector);
+  GPR_ASSERT(creds != NULL);
+  GPR_ASSERT(grpc_call_set_credentials(c, creds) == GRPC_CALL_OK);
+  grpc_credentials_release(creds);
+
+  grpc_metadata_array_init(&initial_metadata_recv);
+  grpc_metadata_array_init(&trailing_metadata_recv);
+  grpc_metadata_array_init(&request_metadata_recv);
+  grpc_call_details_init(&call_details);
+
+  op = ops;
+  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+  op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
+  op->data.recv_status_on_client.status = &status;
+  op->data.recv_status_on_client.status_details = &details;
+  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
+  op->flags = 0;
+  op++;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op->flags = 0;
+  op++;
+  op->op = GRPC_OP_SEND_MESSAGE;
+  op->data.send_message = request_payload;
+  op->flags = 0;
+  op++;
+  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
+  op->flags = 0;
+  op++;
+  op->op = GRPC_OP_RECV_INITIAL_METADATA;
+  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->flags = 0;
+  op++;
+  op->op = GRPC_OP_RECV_MESSAGE;
+  op->data.recv_message = &response_payload_recv;
+  op->flags = 0;
+  op++;
+  GPR_ASSERT(GRPC_CALL_OK == grpc_call_start_batch(c, ops, op - ops, tag(1)));
+
+  cq_expect_completion(cqv, tag(1), 1);
+  cq_verify(cqv);
+
+  GPR_ASSERT(status == GRPC_STATUS_UNAUTHENTICATED);
+
+  grpc_metadata_array_destroy(&initial_metadata_recv);
+  grpc_metadata_array_destroy(&trailing_metadata_recv);
+  grpc_metadata_array_destroy(&request_metadata_recv);
+  grpc_call_details_destroy(&call_details);
+
+  grpc_byte_buffer_destroy(request_payload);
+  grpc_byte_buffer_destroy(response_payload_recv);
+  gpr_free(details);
+
+  grpc_call_destroy(c);
+
+  cq_verifier_destroy(cqv);
+  end_test(&f);
+  config.tear_down_data(&f);
+}
+
 void grpc_end2end_tests(grpc_end2end_test_config config) {
   if (config.feature_mask & FEATURE_MASK_SUPPORTS_PER_CALL_CREDENTIALS) {
     test_call_creds_failure(config);
     test_request_response_with_payload_and_call_creds(config);
     test_request_response_with_payload_and_overridden_call_creds(config);
     test_request_response_with_payload_and_deleted_call_creds(config);
+    test_request_with_server_rejecting_client_creds(config);
   }
 }
diff --git a/test/core/security/auth_context_test.c b/test/core/security/auth_context_test.c
index a30505a63ba..d785eb6064d 100644
--- a/test/core/security/auth_context_test.c
+++ b/test/core/security/auth_context_test.c
@@ -40,7 +40,7 @@
 #include <grpc/support/log.h>
 
 static void test_empty_context(void) {
-  grpc_auth_context *ctx = grpc_auth_context_create(NULL, 0);
+  grpc_auth_context *ctx = grpc_auth_context_create(NULL);
   grpc_auth_property_iterator it;
 
   gpr_log(GPR_INFO, "test_empty_context");
@@ -52,87 +52,98 @@ static void test_empty_context(void) {
   GPR_ASSERT(grpc_auth_property_iterator_next(&it) == NULL);
   it = grpc_auth_context_find_properties_by_name(ctx, "foo");
   GPR_ASSERT(grpc_auth_property_iterator_next(&it) == NULL);
+  GPR_ASSERT(grpc_auth_context_set_peer_identity_property_name(ctx, "bar") ==
+             0);
+  GPR_ASSERT(grpc_auth_context_peer_identity_property_name(ctx) == NULL);
   GRPC_AUTH_CONTEXT_UNREF(ctx, "test");
 }
 
 static void test_simple_context(void) {
-  grpc_auth_context *ctx = grpc_auth_context_create(NULL, 3);
+  grpc_auth_context *ctx = grpc_auth_context_create(NULL);
   grpc_auth_property_iterator it;
   size_t i;
 
   gpr_log(GPR_INFO, "test_simple_context");
   GPR_ASSERT(ctx != NULL);
-  GPR_ASSERT(ctx->property_count == 3);
-  ctx->properties[0] = grpc_auth_property_init_from_cstring("name", "chapi");
-  ctx->properties[1] = grpc_auth_property_init_from_cstring("name", "chapo");
-  ctx->properties[2] = grpc_auth_property_init_from_cstring("foo", "bar");
-  ctx->peer_identity_property_name = ctx->properties[0].name;
+  grpc_auth_context_add_cstring_property(ctx, "name", "chapi");
+  grpc_auth_context_add_cstring_property(ctx, "name", "chapo");
+  grpc_auth_context_add_cstring_property(ctx, "foo", "bar");
+  GPR_ASSERT(ctx->properties.count == 3);
+  GPR_ASSERT(grpc_auth_context_set_peer_identity_property_name(ctx, "name") ==
+             1);
 
   GPR_ASSERT(
       strcmp(grpc_auth_context_peer_identity_property_name(ctx), "name") == 0);
   it = grpc_auth_context_property_iterator(ctx);
-  for (i = 0; i < ctx->property_count; i++) {
+  for (i = 0; i < ctx->properties.count; i++) {
     const grpc_auth_property *p = grpc_auth_property_iterator_next(&it);
-    GPR_ASSERT(p == &ctx->properties[i]);
+    GPR_ASSERT(p == &ctx->properties.array[i]);
   }
   GPR_ASSERT(grpc_auth_property_iterator_next(&it) == NULL);
 
   it = grpc_auth_context_find_properties_by_name(ctx, "foo");
-  GPR_ASSERT(grpc_auth_property_iterator_next(&it) == &ctx->properties[2]);
+  GPR_ASSERT(grpc_auth_property_iterator_next(&it) ==
+             &ctx->properties.array[2]);
   GPR_ASSERT(grpc_auth_property_iterator_next(&it) == NULL);
 
   it = grpc_auth_context_peer_identity(ctx);
-  GPR_ASSERT(grpc_auth_property_iterator_next(&it) == &ctx->properties[0]);
-  GPR_ASSERT(grpc_auth_property_iterator_next(&it) == &ctx->properties[1]);
+  GPR_ASSERT(grpc_auth_property_iterator_next(&it) ==
+             &ctx->properties.array[0]);
+  GPR_ASSERT(grpc_auth_property_iterator_next(&it) ==
+             &ctx->properties.array[1]);
   GPR_ASSERT(grpc_auth_property_iterator_next(&it) == NULL);
 
   GRPC_AUTH_CONTEXT_UNREF(ctx, "test");
 }
 
 static void test_chained_context(void) {
-  grpc_auth_context *chained = grpc_auth_context_create(NULL, 2);
-  grpc_auth_context *ctx = grpc_auth_context_create(chained, 3);
+  grpc_auth_context *chained = grpc_auth_context_create(NULL);
+  grpc_auth_context *ctx = grpc_auth_context_create(chained);
   grpc_auth_property_iterator it;
   size_t i;
 
   gpr_log(GPR_INFO, "test_chained_context");
   GRPC_AUTH_CONTEXT_UNREF(chained, "chained");
-  chained->properties[0] =
-      grpc_auth_property_init_from_cstring("name", "padapo");
-  chained->properties[1] = grpc_auth_property_init_from_cstring("foo", "baz");
-  ctx->properties[0] = grpc_auth_property_init_from_cstring("name", "chapi");
-  ctx->properties[1] = grpc_auth_property_init_from_cstring("name", "chapo");
-  ctx->properties[2] = grpc_auth_property_init_from_cstring("foo", "bar");
-  ctx->peer_identity_property_name = ctx->properties[0].name;
+  grpc_auth_context_add_cstring_property(chained, "name", "padapo");
+  grpc_auth_context_add_cstring_property(chained, "foo", "baz");
+  grpc_auth_context_add_cstring_property(ctx, "name", "chapi");
+  grpc_auth_context_add_cstring_property(ctx, "name", "chap0");
+  grpc_auth_context_add_cstring_property(ctx, "foo", "bar");
+  GPR_ASSERT(grpc_auth_context_set_peer_identity_property_name(ctx, "name") ==
+             1);
 
   GPR_ASSERT(
       strcmp(grpc_auth_context_peer_identity_property_name(ctx), "name") == 0);
   it = grpc_auth_context_property_iterator(ctx);
-  for (i = 0; i < ctx->property_count; i++) {
+  for (i = 0; i < ctx->properties.count; i++) {
     const grpc_auth_property *p = grpc_auth_property_iterator_next(&it);
-    GPR_ASSERT(p == &ctx->properties[i]);
+    GPR_ASSERT(p == &ctx->properties.array[i]);
   }
-  for (i = 0; i < chained->property_count; i++) {
+  for (i = 0; i < chained->properties.count; i++) {
     const grpc_auth_property *p = grpc_auth_property_iterator_next(&it);
-    GPR_ASSERT(p == &chained->properties[i]);
+    GPR_ASSERT(p == &chained->properties.array[i]);
   }
   GPR_ASSERT(grpc_auth_property_iterator_next(&it) == NULL);
 
   it = grpc_auth_context_find_properties_by_name(ctx, "foo");
-  GPR_ASSERT(grpc_auth_property_iterator_next(&it) == &ctx->properties[2]);
-  GPR_ASSERT(grpc_auth_property_iterator_next(&it) == &chained->properties[1]);
+  GPR_ASSERT(grpc_auth_property_iterator_next(&it) ==
+             &ctx->properties.array[2]);
+  GPR_ASSERT(grpc_auth_property_iterator_next(&it) ==
+             &chained->properties.array[1]);
   GPR_ASSERT(grpc_auth_property_iterator_next(&it) == NULL);
 
   it = grpc_auth_context_peer_identity(ctx);
-  GPR_ASSERT(grpc_auth_property_iterator_next(&it) == &ctx->properties[0]);
-  GPR_ASSERT(grpc_auth_property_iterator_next(&it) == &ctx->properties[1]);
-  GPR_ASSERT(grpc_auth_property_iterator_next(&it) == &chained->properties[0]);
+  GPR_ASSERT(grpc_auth_property_iterator_next(&it) ==
+             &ctx->properties.array[0]);
+  GPR_ASSERT(grpc_auth_property_iterator_next(&it) ==
+             &ctx->properties.array[1]);
+  GPR_ASSERT(grpc_auth_property_iterator_next(&it) ==
+             &chained->properties.array[0]);
   GPR_ASSERT(grpc_auth_property_iterator_next(&it) == NULL);
 
   GRPC_AUTH_CONTEXT_UNREF(ctx, "test");
 }
 
-
 int main(int argc, char **argv) {
   grpc_test_init(argc, argv);
   test_empty_context();
diff --git a/test/core/security/credentials_test.c b/test/core/security/credentials_test.c
index dd6e0d7bb3c..ecbff75de7a 100644
--- a/test/core/security/credentials_test.c
+++ b/test/core/security/credentials_test.c
@@ -373,8 +373,8 @@ static void test_ssl_oauth2_composite_creds(void) {
   grpc_credentials *ssl_creds =
       grpc_ssl_credentials_create(test_root_cert, NULL);
   const grpc_credentials_array *creds_array;
-  grpc_credentials *oauth2_creds =
-      grpc_fake_oauth2_credentials_create(test_oauth2_bearer_token, 0);
+  grpc_credentials *oauth2_creds = grpc_md_only_test_credentials_create(
+      "Authorization", test_oauth2_bearer_token, 0);
   grpc_credentials *composite_creds =
       grpc_composite_credentials_create(ssl_creds, oauth2_creds);
   grpc_credentials_unref(ssl_creds);
@@ -424,8 +424,8 @@ static void test_ssl_oauth2_iam_composite_creds(void) {
   grpc_credentials *ssl_creds =
       grpc_ssl_credentials_create(test_root_cert, NULL);
   const grpc_credentials_array *creds_array;
-  grpc_credentials *oauth2_creds =
-      grpc_fake_oauth2_credentials_create(test_oauth2_bearer_token, 0);
+  grpc_credentials *oauth2_creds = grpc_md_only_test_credentials_create(
+      "Authorization", test_oauth2_bearer_token, 0);
   grpc_credentials *aux_creds =
       grpc_composite_credentials_create(ssl_creds, oauth2_creds);
   grpc_credentials *iam_creds = grpc_iam_credentials_create(
diff --git a/test/cpp/common/auth_property_iterator_test.cc b/test/cpp/common/auth_property_iterator_test.cc
index 3d983fa3109..74b18ced0d5 100644
--- a/test/cpp/common/auth_property_iterator_test.cc
+++ b/test/cpp/common/auth_property_iterator_test.cc
@@ -31,10 +31,14 @@
  *
  */
 
+#include <grpc/grpc_security.h>
 #include <grpc++/auth_context.h>
 #include <gtest/gtest.h>
 #include "src/cpp/common/secure_auth_context.h"
+
+extern "C" {
 #include "src/core/security/security_context.h"
+}
 
 namespace grpc {
 namespace {
@@ -50,14 +54,15 @@ class TestAuthPropertyIterator : public AuthPropertyIterator {
 class AuthPropertyIteratorTest : public ::testing::Test {
  protected:
   void SetUp() GRPC_OVERRIDE {
-    ctx_ = grpc_auth_context_create(NULL, 3);
-    ctx_->properties[0] = grpc_auth_property_init_from_cstring("name", "chapi");
-    ctx_->properties[1] = grpc_auth_property_init_from_cstring("name", "chapo");
-    ctx_->properties[2] = grpc_auth_property_init_from_cstring("foo", "bar");
-    ctx_->peer_identity_property_name = ctx_->properties[0].name;
+    ctx_ = grpc_auth_context_create(NULL);
+    grpc_auth_context_add_cstring_property(ctx_, "name", "chapi");
+    grpc_auth_context_add_cstring_property(ctx_, "name", "chapo");
+    grpc_auth_context_add_cstring_property(ctx_, "foo", "bar");
+    EXPECT_EQ(1,
+              grpc_auth_context_set_peer_identity_property_name(ctx_, "name"));
   }
   void TearDown() GRPC_OVERRIDE {
-    GRPC_AUTH_CONTEXT_UNREF(ctx_, "AuthPropertyIteratorTest");
+    grpc_auth_context_release(ctx_);
   }
   grpc_auth_context* ctx_;
 
diff --git a/test/cpp/common/secure_auth_context_test.cc b/test/cpp/common/secure_auth_context_test.cc
index d0243a5432d..075d4ce8c98 100644
--- a/test/cpp/common/secure_auth_context_test.cc
+++ b/test/cpp/common/secure_auth_context_test.cc
@@ -31,10 +31,14 @@
  *
  */
 
+#include <grpc/grpc_security.h>
 #include <grpc++/auth_context.h>
 #include <gtest/gtest.h>
 #include "src/cpp/common/secure_auth_context.h"
+
+extern "C" {
 #include "src/core/security/security_context.h"
+}
 
 namespace grpc {
 namespace {
@@ -52,11 +56,11 @@ TEST_F(SecureAuthContextTest, EmptyContext) {
 }
 
 TEST_F(SecureAuthContextTest, Properties) {
-  grpc_auth_context* ctx = grpc_auth_context_create(NULL, 3);
-  ctx->properties[0] = grpc_auth_property_init_from_cstring("name", "chapi");
-  ctx->properties[1] = grpc_auth_property_init_from_cstring("name", "chapo");
-  ctx->properties[2] = grpc_auth_property_init_from_cstring("foo", "bar");
-  ctx->peer_identity_property_name = ctx->properties[0].name;
+  grpc_auth_context* ctx = grpc_auth_context_create(NULL);
+  grpc_auth_context_add_cstring_property(ctx, "name", "chapi");
+  grpc_auth_context_add_cstring_property(ctx, "name", "chapo");
+  grpc_auth_context_add_cstring_property(ctx, "foo", "bar");
+  EXPECT_EQ(1, grpc_auth_context_set_peer_identity_property_name(ctx, "name"));
 
   SecureAuthContext context(ctx);
   std::vector<grpc::string> peer_identity = context.GetPeerIdentity();
@@ -70,11 +74,11 @@ TEST_F(SecureAuthContextTest, Properties) {
 }
 
 TEST_F(SecureAuthContextTest, Iterators) {
-  grpc_auth_context* ctx = grpc_auth_context_create(NULL, 3);
-  ctx->properties[0] = grpc_auth_property_init_from_cstring("name", "chapi");
-  ctx->properties[1] = grpc_auth_property_init_from_cstring("name", "chapo");
-  ctx->properties[2] = grpc_auth_property_init_from_cstring("foo", "bar");
-  ctx->peer_identity_property_name = ctx->properties[0].name;
+  grpc_auth_context* ctx = grpc_auth_context_create(NULL);
+  grpc_auth_context_add_cstring_property(ctx, "name", "chapi");
+  grpc_auth_context_add_cstring_property(ctx, "name", "chapo");
+  grpc_auth_context_add_cstring_property(ctx, "foo", "bar");
+  EXPECT_EQ(1, grpc_auth_context_set_peer_identity_property_name(ctx, "name"));
 
   SecureAuthContext context(ctx);
   AuthPropertyIterator iter = context.begin();