Signed configurations

/dts-v1/;

/ {
    description = "Chrome OS kernel image with one or more FDT blobs";
    #address-cells = <1>;

    images {
        kernel {
            data = /incbin/("test-kernel.bin");
            type = "kernel_noload";
            arch = "sandbox";
            os = "linux";
            compression = "lzo";
            load = <0x4>;
            entry = <0x8>;
            kernel-version = <1>;
            hash-1 {
                algo = "sha256";
            };
        };
        fdt-1 {
            description = "snow";
            data = /incbin/("sandbox-kernel.dtb");
            type = "flat_dt";
            arch = "sandbox";
            compression = "none";
            fdt-version = <1>;
            hash-1 {
                algo = "sha256";
            };
        };
    };
    configurations {
        default = "conf-1";
        conf-1 {
            kernel = "kernel";
            fdt = "fdt-1";
            signature {
                algo = "sha256,rsa2048";
                key-name-hint = "dev";
                sign-images = "fdt", "kernel";
            };
        };
    };
};