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/*
* Copyright (c) 2010-2012 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
* Copyright (c) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
*
* Under GPLv2 only
*/
#include <common.h>
#include <crypto/sha.h>
#include <crypto/pbl-sha.h>
#include <digest.h>
#include <asm/sections.h>
#include <pbl.h>
#include <debug_ll.h>
#define STATIC static
#ifdef CONFIG_IMAGE_COMPRESSION_LZ4
#include "../../../lib/decompress_unlz4.c"
#endif
#ifdef CONFIG_IMAGE_COMPRESSION_LZO
#include "../../../lib/decompress_unlzo.c"
#endif
#ifdef CONFIG_IMAGE_COMPRESSION_GZIP
#include "../../../lib/decompress_inflate.c"
#endif
#ifdef CONFIG_IMAGE_COMPRESSION_XZKERN
#include "../../../lib/decompress_unxz.c"
#endif
#ifdef CONFIG_IMAGE_COMPRESSION_NONE
STATIC int decompress(u8 *input, int in_len,
int (*fill) (void *, unsigned int),
int (*flush) (void *, unsigned int),
u8 *output, int *posp,
void (*error) (char *x))
{
memcpy(output, input, in_len);
return 0;
}
#endif
static void noinline errorfn(char *error)
{
puts_ll("ERROR: ");
puts_ll(error);
puts_ll("\nHANG\n");
while (1);
}
extern unsigned char sha_sum[];
extern unsigned char sha_sum_end[];
static int pbl_barebox_verify(void *compressed_start, unsigned int len, void *hash,
unsigned int hash_len)
{
struct sha256_state sha_state = { 0 };
struct digest d = { .ctx = &sha_state };
char computed_hash[SHA256_DIGEST_SIZE];
int i;
char *char_hash = hash;
if (hash_len != SHA256_DIGEST_SIZE)
return -1;
sha256_init(&d);
sha256_update(&d, compressed_start, len);
sha256_final(&d, computed_hash);
if (IS_ENABLED(CONFIG_DEBUG_LL)) {
putc_ll('C');
putc_ll('H');
putc_ll('\n');
for (i = 0; i < SHA256_DIGEST_SIZE; i++) {
puthex_ll(computed_hash[i]);
putc_ll('\n');
}
putc_ll('I');
putc_ll('H');
putc_ll('\n');
for (i = 0; i < SHA256_DIGEST_SIZE; i++) {
puthex_ll(char_hash[i]);
putc_ll('\n');
}
}
return memcmp(hash, computed_hash, SHA256_DIGEST_SIZE);
}
void pbl_barebox_uncompress(void *dest, void *compressed_start, unsigned int len)
{
uint32_t pbl_hash_len;
void *pbl_hash_start, *pbl_hash_end;
if (IS_ENABLED(CONFIG_PBL_VERIFY_PIGGY)) {
pbl_hash_start = sha_sum;
pbl_hash_end = sha_sum_end;
pbl_hash_len = pbl_hash_end - pbl_hash_start;
if (pbl_barebox_verify(compressed_start, len, pbl_hash_start,
pbl_hash_len) != 0) {
putc_ll('!');
panic("hash mismatch, refusing to decompress");
}
}
decompress((void *)compressed_start,
len,
NULL, NULL,
dest, NULL, errorfn);
}
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