int
adapt_decompress(void *src, uint64_t srclen, void *dst,
uint64_t *dstlen, int level, uchar_t chdr, int btype, void *data)
{
struct adapt_data *adat = (struct adapt_data *)(data);
uchar_t cmp_flags;
cmp_flags = CHDR_ALGO(chdr);
if (cmp_flags == ADAPT_COMPRESS_LZ4) {
return (lz4_decompress(src, srclen, dst, dstlen, 1, chdr, btype, adat->lz4_data));
} else if (cmp_flags == ADAPT_COMPRESS_LZMA) {
return (lzma_decompress(src, srclen, dst, dstlen, level, chdr, btype, adat->lzma_data));
} else if (cmp_flags == ADAPT_COMPRESS_BZIP2) {
return (bzip2_decompress(src, srclen, dst, dstlen, level, chdr, btype, NULL));
} else if (cmp_flags == ADAPT_COMPRESS_PPMD) {
return (ppmd_decompress(src, srclen, dst, dstlen, level, chdr, btype, adat->ppmd_data));
} else if (cmp_flags == ADAPT_COMPRESS_BSC) {
#ifdef ENABLE_PC_LIBBSC
return (libbsc_decompress(src, srclen, dst, dstlen, level, chdr, btype, adat->bsc_data));
#else
log_msg(LOG_ERR, 0, "Cannot decompress chunk. Libbsc support not present.\n");
return (-1);
#endif
} else {
log_msg(LOG_ERR, 0, "Unrecognized compression mode: %d, file corrupt.\n", cmp_flags);
}
return (-1);
}
static int lz4hc_decompress_crypto(struct crypto_tfm *tfm, const u8 *src,
unsigned int slen, u8 *dst, unsigned int *dlen)
{
int err;
size_t tmp_len = *dlen;
err = lz4_decompress(src, &slen, dst, tmp_len);
if (err < 0)
return -EINVAL;
*dlen = tmp_len;
return err;
}
static inline int unlz4(u8 *input, int in_len,
int (*fill) (void *, unsigned int),
int (*flush) (void *, unsigned int),
u8 *output, int *posp,
void (*error) (char *x))
{
int ret = -1;
size_t chunksize = 0;
size_t uncomp_chunksize = LZ4_DEFAULT_UNCOMPRESSED_CHUNK_SIZE;
u8 *inp;
u8 *inp_start;
u8 *outp;
int size = in_len;
#ifdef PREBOOT
size_t out_len = get_unaligned_le32(input + in_len);
#endif
size_t dest_len;
if (output) {
outp = output;
} else if (!flush) {
error("NULL output pointer and no flush function provided");
goto exit_0;
} else {
outp = MALLOC(uncomp_chunksize);
if (!outp) {
error("Could not allocate output buffer");
goto exit_0;
}
}
if (input && fill) {
error("Both input pointer and fill function provided,");
goto exit_1;
} else if (input) {
inp = input;
} else if (!fill) {
error("NULL input pointer and missing fill function");
goto exit_1;
} else {
inp = MALLOC(lz4_compressbound(uncomp_chunksize));
if (!inp) {
error("Could not allocate input buffer");
goto exit_1;
}
}
inp_start = inp;
if (posp)
*posp = 0;
if (fill)
fill(inp, 4);
chunksize = get_unaligned_le32(inp);
if (chunksize == ARCHIVE_MAGICNUMBER) {
inp += 4;
size -= 4;
} else {
error("invalid header");
goto exit_2;
}
if (posp)
*posp += 4;
for (;;) {
if (fill)
fill(inp, 4);
chunksize = get_unaligned_le32(inp);
if (chunksize == ARCHIVE_MAGICNUMBER) {
inp += 4;
size -= 4;
if (posp)
*posp += 4;
continue;
}
inp += 4;
size -= 4;
if (posp)
*posp += 4;
if (fill) {
if (chunksize > lz4_compressbound(uncomp_chunksize)) {
error("chunk length is longer than allocated");
goto exit_2;
}
fill(inp, chunksize);
}
#ifdef PREBOOT
if (out_len >= uncomp_chunksize) {
dest_len = uncomp_chunksize;
out_len -= dest_len;
} else
dest_len = out_len;
ret = lz4_decompress(inp, &chunksize, outp, dest_len);
#else
dest_len = uncomp_chunksize;
ret = lz4_decompress_unknownoutputsize(inp, chunksize, outp,
&dest_len);
#endif
if (ret < 0) {
error("Decoding failed");
goto exit_2;
}
if (flush && flush(outp, dest_len) != dest_len)
goto exit_2;
if (output)
outp += dest_len;
if (posp)
*posp += chunksize;
size -= chunksize;
if (size == 0)
break;
else if (size < 0) {
error("data corrupted");
goto exit_2;
}
inp += chunksize;
if (fill)
inp = inp_start;
}
ret = 0;
exit_2:
if (!input)
FREE(inp_start);
exit_1:
if (!output)
FREE(outp);
exit_0:
return ret;
}
