|  | @@ -151,9 +151,11 @@ static grpc_byte_buffer* generate_handshaker_response(
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				|  |  |        result = grpc_gcp_HandshakerResp_mutable_result(resp, arena.ptr());
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				|  |  |        peer_identity =
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				|  |  |            grpc_gcp_HandshakerResult_mutable_peer_identity(result, arena.ptr());
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				|  |  | -      grpc_gcp_Identity_attributes_set(peer_identity, upb_strview_makez(
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				|  |  | -          ALTS_TSI_HANDSHAKER_TEST_PEER_ATTRIBUTES_KEY), upb_strview_makez(
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				|  |  | -          ALTS_TSI_HANDSHAKER_TEST_PEER_ATTRIBUTES_VALUE), arena.ptr());
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				|  |  | +      grpc_gcp_Identity_attributes_set(
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				|  |  | +          peer_identity, 
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				|  |  | +          upb_strview_makez(ALTS_TSI_HANDSHAKER_TEST_PEER_ATTRIBUTES_KEY), 
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				|  |  | +          upb_strview_makez(ALTS_TSI_HANDSHAKER_TEST_PEER_ATTRIBUTES_VALUE),
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				|  |  | +          arena.ptr());
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				|  |  |        grpc_gcp_Identity_set_service_account(
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				|  |  |            peer_identity,
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				|  |  |            upb_strview_makez(ALTS_TSI_HANDSHAKER_TEST_PEER_IDENTITY));
 | 
	
	
		
			
				|  | @@ -183,9 +185,11 @@ static grpc_byte_buffer* generate_handshaker_response(
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				|  |  |        result = grpc_gcp_HandshakerResp_mutable_result(resp, arena.ptr());
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				|  |  |        peer_identity =
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				|  |  |            grpc_gcp_HandshakerResult_mutable_peer_identity(result, arena.ptr());
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				|  |  | -      grpc_gcp_Identity_attributes_set(peer_identity, upb_strview_makez(
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				|  |  | -          ALTS_TSI_HANDSHAKER_TEST_PEER_ATTRIBUTES_KEY), upb_strview_makez(
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				|  |  | -          ALTS_TSI_HANDSHAKER_TEST_PEER_ATTRIBUTES_VALUE), arena.ptr());
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				|  |  | +      grpc_gcp_Identity_attributes_set(
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				|  |  | +          peer_identity, 
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				|  |  | +          upb_strview_makez(ALTS_TSI_HANDSHAKER_TEST_PEER_ATTRIBUTES_KEY), 
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				|  |  | +          upb_strview_makez(ALTS_TSI_HANDSHAKER_TEST_PEER_ATTRIBUTES_VALUE),
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				|  |  | +          arena.ptr());
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				|  |  |        grpc_gcp_Identity_set_service_account(
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				|  |  |            peer_identity,
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				|  |  |            upb_strview_makez(ALTS_TSI_HANDSHAKER_TEST_PEER_IDENTITY));
 | 
	
	
		
			
				|  | @@ -338,14 +342,23 @@ static void on_client_next_success_cb(tsi_result status, void* user_data,
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				|  |  |    GPR_ASSERT(memcmp(ALTS_TSI_HANDSHAKER_TEST_LOCAL_IDENTITY, local_account.data,
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				|  |  |                      local_account.size) == 0);
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				|  |  |    size_t iter = UPB_MAP_BEGIN;
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				|  |  | -  grpc_gcp_AltsContext_PeerAttributesEntry* peer_attributes_entry = grpc_gcp_AltsContext_peer_attributes_nextmutable(ctx, &iter);
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				|  |  | +  grpc_gcp_AltsContext_PeerAttributesEntry* peer_attributes_entry = 
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				|  |  | +      grpc_gcp_AltsContext_peer_attributes_nextmutable(ctx, &iter);
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				|  |  |    GPR_ASSERT(peer_attributes_entry != nullptr);
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				|  |  |    while ( peer_attributes_entry != nullptr) {
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				|  |  | -    upb_strview key = grpc_gcp_AltsContext_PeerAttributesEntry_key(const_cast<grpc_gcp_AltsContext_PeerAttributesEntry*>(peer_attributes_entry));
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				|  |  | -    upb_strview val = grpc_gcp_AltsContext_PeerAttributesEntry_value(const_cast<grpc_gcp_AltsContext_PeerAttributesEntry*>(peer_attributes_entry));
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				|  |  | -    GPR_ASSERT(upb_strview_eql(key, upb_strview_makez(ALTS_TSI_HANDSHAKER_TEST_PEER_ATTRIBUTES_KEY)));
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				|  |  | -    GPR_ASSERT(upb_strview_eql(val, upb_strview_makez(ALTS_TSI_HANDSHAKER_TEST_PEER_ATTRIBUTES_VALUE)));
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				|  |  | -    peer_attributes_entry = grpc_gcp_AltsContext_peer_attributes_nextmutable(ctx, &iter);
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				|  |  | +    upb_strview key = grpc_gcp_AltsContext_PeerAttributesEntry_key(
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				|  |  | +        const_cast<grpc_gcp_AltsContext_PeerAttributesEntry*>(
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				|  |  | +            peer_attributes_entry));
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				|  |  | +    upb_strview val = grpc_gcp_AltsContext_PeerAttributesEntry_value(
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				|  |  | +        const_cast<grpc_gcp_AltsContext_PeerAttributesEntry*>(
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				|  |  | +            peer_attributes_entry));
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				|  |  | +    GPR_ASSERT(upb_strview_eql(
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				|  |  | +        key, upb_strview_makez(ALTS_TSI_HANDSHAKER_TEST_PEER_ATTRIBUTES_KEY)));
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				|  |  | +    GPR_ASSERT(upb_strview_eql(
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				|  |  | +        val, 
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				|  |  | +        upb_strview_makez(ALTS_TSI_HANDSHAKER_TEST_PEER_ATTRIBUTES_VALUE)));
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				|  |  | +    peer_attributes_entry = 
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				|  |  | +        grpc_gcp_AltsContext_peer_attributes_nextmutable(ctx, &iter);
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				|  |  |    }
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				|  |  |    /* Validate security level. */
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				|  |  |    GPR_ASSERT(memcmp(ALTS_TSI_HANDSHAKER_TEST_SECURITY_LEVEL,
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				|  | @@ -423,14 +436,23 @@ static void on_server_next_success_cb(tsi_result status, void* user_data,
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				|  |  |                      local_account.size) == 0);
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				|  |  |  
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				|  |  |    size_t iter = UPB_MAP_BEGIN;
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				|  |  | -  grpc_gcp_AltsContext_PeerAttributesEntry* peer_attributes_entry = grpc_gcp_AltsContext_peer_attributes_nextmutable(ctx, &iter);
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				|  |  | +  grpc_gcp_AltsContext_PeerAttributesEntry* peer_attributes_entry = 
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				|  |  | +      grpc_gcp_AltsContext_peer_attributes_nextmutable(ctx, &iter);
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				|  |  |    GPR_ASSERT(peer_attributes_entry != nullptr);
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				|  |  |    while ( peer_attributes_entry != nullptr) {
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				|  |  | -    upb_strview key = grpc_gcp_AltsContext_PeerAttributesEntry_key(const_cast<grpc_gcp_AltsContext_PeerAttributesEntry*>(peer_attributes_entry));
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				|  |  | -    upb_strview val = grpc_gcp_AltsContext_PeerAttributesEntry_value(const_cast<grpc_gcp_AltsContext_PeerAttributesEntry*>(peer_attributes_entry));
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				|  |  | -    GPR_ASSERT(upb_strview_eql(key, upb_strview_makez(ALTS_TSI_HANDSHAKER_TEST_PEER_ATTRIBUTES_KEY)));
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				|  |  | -    GPR_ASSERT(upb_strview_eql(val, upb_strview_makez(ALTS_TSI_HANDSHAKER_TEST_PEER_ATTRIBUTES_VALUE)));
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				|  |  | -    peer_attributes_entry = grpc_gcp_AltsContext_peer_attributes_nextmutable(ctx, &iter);
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				|  |  | +    upb_strview key = grpc_gcp_AltsContext_PeerAttributesEntry_key(
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				|  |  | +        const_cast<grpc_gcp_AltsContext_PeerAttributesEntry*>(
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				|  |  | +            peer_attributes_entry));
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				|  |  | +    upb_strview val = grpc_gcp_AltsContext_PeerAttributesEntry_value(
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				|  |  | +        const_cast<grpc_gcp_AltsContext_PeerAttributesEntry*>(
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				|  |  | +            peer_attributes_entry));
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				|  |  | +    GPR_ASSERT(upb_strview_eql(
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				|  |  | +        key, upb_strview_makez(ALTS_TSI_HANDSHAKER_TEST_PEER_ATTRIBUTES_KEY)));
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				|  |  | +    GPR_ASSERT(upb_strview_eql(
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				|  |  | +        val, 
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				|  |  | +        upb_strview_makez(ALTS_TSI_HANDSHAKER_TEST_PEER_ATTRIBUTES_VALUE)));
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				|  |  | +    peer_attributes_entry = 
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				|  |  | +        grpc_gcp_AltsContext_peer_attributes_nextmutable(ctx, &iter);
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				|  |  |    }
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				|  |  |    /* Check security level. */
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				|  |  |    GPR_ASSERT(memcmp(ALTS_TSI_HANDSHAKER_TEST_SECURITY_LEVEL,
 |