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87b0af9317
This adds support for signing images in auto-generated FITs. To do this, we need to add a signature node. The algorithm name property already has its own option, but we need one for the key name hint. We could have gone the -G route and added an explicit name for the public key (like what is done for the private key). However, many places assume the public key can be constructed from the key dir and hint, and I don't want to do the refactoring necessary. As a consequence of this, it is now easier to add public keys to an existing image without signing something. This could be done all along, but now you don't have to create an its just to do it. Ideally, we wouldn't create a FIT at the end. This could be done by calling fit_image_setup_sig/info.crypto->add_verify_data directly. Signed-off-by: Sean Anderson <sean.anderson@seco.com>
331 lines
11 KiB
C
331 lines
11 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2013
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*
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* Written by Guilherme Maciel Ferreira <guilherme.maciel.ferreira@gmail.com>
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*/
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#ifndef _IMAGETOOL_H_
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#define _IMAGETOOL_H_
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#include "os_support.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <time.h>
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#include <unistd.h>
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#include <u-boot/sha1.h>
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#include <image.h>
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#include "fdt_host.h"
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
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#define __ALIGN_MASK(x, mask) (((x) + (mask)) & ~(mask))
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#define ALIGN(x, a) __ALIGN_MASK((x), (typeof(x))(a) - 1)
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#define IH_ARCH_DEFAULT IH_ARCH_INVALID
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/* Information about a file that needs to be placed into the FIT */
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struct content_info {
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struct content_info *next;
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int type; /* File type (IH_TYPE_...) */
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const char *fname;
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};
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/*
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* This structure defines all such variables those are initialized by
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* mkimage and dumpimage main core and need to be referred by image
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* type specific functions
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*/
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struct image_tool_params {
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int dflag;
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int eflag;
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int fflag;
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int iflag;
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int lflag;
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int pflag;
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int vflag;
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int xflag;
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int Aflag;
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int skipcpy;
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int os;
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int arch;
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int type;
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int comp;
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char *dtc;
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unsigned int addr;
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unsigned int ep;
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char *imagename;
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char *imagename2;
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char *datafile;
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char *imagefile;
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char *cmdname;
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const char *outfile; /* Output filename */
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const char *keydir; /* Directory holding private keys */
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const char *keydest; /* Destination .dtb for public key */
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const char *keyfile; /* Filename of private or public key */
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const char *keyname; /* Key name "hint" */
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const char *comment; /* Comment to add to signature node */
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/* Algorithm name to use for hashing/signing or NULL to use the one
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* specified in the its */
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const char *algo_name;
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int require_keys; /* 1 to mark signing keys as 'required' */
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int file_size; /* Total size of output file */
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int orig_file_size; /* Original size for file before padding */
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bool auto_its; /* Automatically create the .its file */
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int fit_image_type; /* Image type to put into the FIT */
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char *fit_ramdisk; /* Ramdisk file to include */
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struct content_info *content_head; /* List of files to include */
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struct content_info *content_tail;
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bool external_data; /* Store data outside the FIT */
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bool quiet; /* Don't output text in normal operation */
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unsigned int external_offset; /* Add padding to external data */
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int bl_len; /* Block length in byte for external data */
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const char *engine_id; /* Engine to use for signing */
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bool reset_timestamp; /* Reset the timestamp on an existing image */
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struct image_summary summary; /* results of signing process */
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};
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/*
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* image type specific variables and callback functions
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*/
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struct image_type_params {
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/* name is an identification tag string for added support */
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char *name;
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/*
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* header size is local to the specific image type to be supported,
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* mkimage core treats this as number of bytes
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*/
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uint32_t header_size;
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/* Image type header pointer */
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void *hdr;
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/*
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* There are several arguments that are passed on the command line
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* and are registered as flags in image_tool_params structure.
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* This callback function can be used to check the passed arguments
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* are in-lined with the image type to be supported
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*
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* Returns 1 if parameter check is successful
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*/
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int (*check_params) (struct image_tool_params *);
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/*
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* This function is used by list command (i.e. mkimage -l <filename>)
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* image type verification code must be put here
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*
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* Returns 0 if image header verification is successful
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* otherwise, returns respective negative error codes
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*/
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int (*verify_header) (unsigned char *, int, struct image_tool_params *);
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/* Prints image information abstracting from image header */
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void (*print_header) (const void *);
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/*
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* The header or image contents need to be set as per image type to
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* be generated using this callback function.
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* further output file post processing (for ex. checksum calculation,
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* padding bytes etc..) can also be done in this callback function.
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*/
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void (*set_header) (void *, struct stat *, int,
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struct image_tool_params *);
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/*
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* This function is used by the command to retrieve a component
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* (sub-image) from the image (i.e. dumpimage -p <position>
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* -o <component-outfile> <image>). Thus the code to extract a file
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* from an image must be put here.
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*
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* Returns 0 if the file was successfully retrieved from the image,
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* or a negative value on error.
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*/
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int (*extract_subimage)(void *, struct image_tool_params *);
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/*
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* Some image generation support for ex (default image type) supports
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* more than one type_ids, this callback function is used to check
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* whether input (-T <image_type>) is supported by registered image
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* generation/list low level code
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*/
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int (*check_image_type) (uint8_t);
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/* This callback function will be executed if fflag is defined */
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int (*fflag_handle) (struct image_tool_params *);
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/*
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* This callback function will be executed for variable size record
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* It is expected to build this header in memory and return its length
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* and a pointer to it by using image_type_params.header_size and
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* image_type_params.hdr. The return value shall indicate if an
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* additional padding should be used when copying the data image
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* by returning the padding length.
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*/
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int (*vrec_header) (struct image_tool_params *,
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struct image_type_params *);
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};
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/**
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* imagetool_get_type() - find the image type params for a given image type
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*
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* It scans all registers image type supports
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* checks the input type for each supported image type
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*
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* if successful,
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* returns respective image_type_params pointer if success
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* if input type_id is not supported by any of image_type_support
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* returns NULL
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*/
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struct image_type_params *imagetool_get_type(int type);
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/*
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* imagetool_verify_print_header() - verifies the image header
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*
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* Verify the image_header for the image type given by tparams.
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* If tparams is NULL then scan registered image types and verify the
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* image_header for each supported image type.
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* If verification is successful, this prints the respective header.
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* @ptr: pointer the the image header
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* @sbuf: stat information about the file pointed to by ptr
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* @tparams: image type parameters or NULL
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* @params: mkimage parameters
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*
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* Return: 0 on success, negative if input image format does not match with
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* the given image type
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*/
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int imagetool_verify_print_header(
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void *ptr,
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struct stat *sbuf,
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struct image_type_params *tparams,
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struct image_tool_params *params);
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/**
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* imagetool_save_subimage - store data into a file
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* @file_name: name of the destination file
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* @file_data: data to be written
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* @file_len: the amount of data to store
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*
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* imagetool_save_subimage() store file_len bytes of data pointed by file_data
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* into the file name by file_name.
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*
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* returns:
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* zero in case of success or a negative value if fail.
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*/
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int imagetool_save_subimage(
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const char *file_name,
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ulong file_data,
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ulong file_len);
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/**
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* imagetool_get_filesize() - Utility function to obtain the size of a file
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*
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* This function prints a message if an error occurs, showing the error that
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* was obtained.
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*
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* @params: mkimage parameters
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* @fname: filename to check
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* Return: size of file, or -ve value on error
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*/
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int imagetool_get_filesize(struct image_tool_params *params, const char *fname);
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/**
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* imagetool_get_source_date() - Get timestamp for build output.
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*
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* Gets a timestamp for embedding it in a build output. If set
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* SOURCE_DATE_EPOCH is used. Else the given fallback value is returned. Prints
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* an error message if SOURCE_DATE_EPOCH contains an invalid value and returns
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* 0.
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*
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* @cmdname: command name
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* @fallback: timestamp to use if SOURCE_DATE_EPOCH isn't set
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* Return: timestamp based on SOURCE_DATE_EPOCH
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*/
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time_t imagetool_get_source_date(
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const char *cmdname,
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time_t fallback);
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/*
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* There is a c file associated with supported image type low level code
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* for ex. default_image.c, fit_image.c
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*/
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void pbl_load_uboot(int fd, struct image_tool_params *mparams);
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int zynqmpbif_copy_image(int fd, struct image_tool_params *mparams);
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int imx8image_copy_image(int fd, struct image_tool_params *mparams);
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int imx8mimage_copy_image(int fd, struct image_tool_params *mparams);
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int rockchip_copy_image(int fd, struct image_tool_params *mparams);
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#define ___cat(a, b) a ## b
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#define __cat(a, b) ___cat(a, b)
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/* we need some special handling for this host tool running eventually on
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* Darwin. The Mach-O section handling is a bit different than ELF section
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* handling. The differnces in detail are:
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* a) we have segments which have sections
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* b) we need a API call to get the respective section symbols */
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#if defined(__MACH__)
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#include <mach-o/getsect.h>
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#include <mach-o/dyld.h>
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#define INIT_SECTION(name) do { \
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unsigned long name ## _len; \
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char *__cat(pstart_, name) = getsectdata("__DATA", \
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#name, &__cat(name, _len)); \
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__cat(pstart_, name) += _dyld_get_image_vmaddr_slide(0);\
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char *__cat(pstop_, name) = __cat(pstart_, name) + \
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__cat(name, _len); \
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__cat(__start_, name) = (void *)__cat(pstart_, name); \
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__cat(__stop_, name) = (void *)__cat(pstop_, name); \
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} while (0)
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#define SECTION(name) __attribute__((section("__DATA, " #name)))
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struct image_type_params **__start_image_type, **__stop_image_type;
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#else
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#define INIT_SECTION(name) /* no-op for ELF */
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#define SECTION(name) __attribute__((section(#name)))
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/* We construct a table of pointers in an ELF section (pointers generally
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* go unpadded by gcc). ld creates boundary syms for us. */
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extern struct image_type_params *__start_image_type[], *__stop_image_type[];
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#endif /* __MACH__ */
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#if !defined(__used)
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# if __GNUC__ == 3 && __GNUC_MINOR__ < 3
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# define __used __attribute__((__unused__))
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# else
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# define __used __attribute__((__used__))
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# endif
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#endif
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#define U_BOOT_IMAGE_TYPE( \
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_id, \
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_name, \
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_header_size, \
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_header, \
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_check_params, \
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_verify_header, \
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_print_header, \
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_set_header, \
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_extract_subimage, \
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_check_image_type, \
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_fflag_handle, \
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_vrec_header \
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) \
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static struct image_type_params __cat(image_type_, _id) = \
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{ \
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.name = _name, \
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.header_size = _header_size, \
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.hdr = _header, \
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.check_params = _check_params, \
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.verify_header = _verify_header, \
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.print_header = _print_header, \
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.set_header = _set_header, \
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.extract_subimage = _extract_subimage, \
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.check_image_type = _check_image_type, \
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.fflag_handle = _fflag_handle, \
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.vrec_header = _vrec_header \
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}; \
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static struct image_type_params *SECTION(image_type) __used \
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__cat(image_type_ptr_, _id) = &__cat(image_type_, _id)
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#endif /* _IMAGETOOL_H_ */
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