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| author | Lasse Collin <lasse.collin@tukaani.org> | 2014-08-05 22:03:30 +0300 |
|---|---|---|
| committer | Lasse Collin <lasse.collin@tukaani.org> | 2014-08-05 22:03:30 +0300 |
| commit | 0e0f34b8e4f1c60ecaec15c2105982381cc9c3e6 (patch) | |
| tree | b3bf3edf8e17dcb53f0bad5edc6403947a5ef72d /src/liblzma/common/block_decoder.c | |
| parent | liblzma: Use lzma_memcmplen() in the BT3 match finder. (diff) | |
| download | xz-0e0f34b8e4f1c60ecaec15c2105982381cc9c3e6.tar.xz | |
liblzma: Add support for lzma_block.ignore_check.
Note that this slightly changes how lzma_block_header_decode()
has been documented. Earlier it said that the .version is set
to the lowest required value, but now it says that the .version
field is kept unchanged if possible. In practice this doesn't
affect any old code, because before this commit the only
possible .version was 0.
Diffstat (limited to '')
| -rw-r--r-- | src/liblzma/common/block_decoder.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/src/liblzma/common/block_decoder.c b/src/liblzma/common/block_decoder.c index cee6c782..685c3b03 100644 --- a/src/liblzma/common/block_decoder.c +++ b/src/liblzma/common/block_decoder.c @@ -45,6 +45,9 @@ struct lzma_coder_s { /// Check of the uncompressed data lzma_check_state check; + + /// True if the integrity check won't be calculated and verified. + bool ignore_check; }; @@ -97,8 +100,9 @@ block_decode(lzma_coder *coder, const lzma_allocator *allocator, coder->block->uncompressed_size)) return LZMA_DATA_ERROR; - lzma_check_update(&coder->check, coder->block->check, - out + out_start, out_used); + if (!coder->ignore_check) + lzma_check_update(&coder->check, coder->block->check, + out + out_start, out_used); if (ret != LZMA_STREAM_END) return ret; @@ -140,7 +144,9 @@ block_decode(lzma_coder *coder, const lzma_allocator *allocator, if (coder->block->check == LZMA_CHECK_NONE) return LZMA_STREAM_END; - lzma_check_finish(&coder->check, coder->block->check); + if (!coder->ignore_check) + lzma_check_finish(&coder->check, coder->block->check); + coder->sequence = SEQ_CHECK; // Fall through @@ -155,7 +161,8 @@ block_decode(lzma_coder *coder, const lzma_allocator *allocator, // Validate the Check only if we support it. // coder->check.buffer may be uninitialized // when the Check ID is not supported. - if (lzma_check_is_supported(coder->block->check) + if (!coder->ignore_check + && lzma_check_is_supported(coder->block->check) && memcmp(coder->block->raw_check, coder->check.buffer.u8, check_size) != 0) @@ -224,6 +231,9 @@ lzma_block_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator, next->coder->check_pos = 0; lzma_check_init(&next->coder->check, block->check); + next->coder->ignore_check = block->version >= 1 + ? block->ignore_check : false; + // Initialize the filter chain. return lzma_raw_decoder_init(&next->coder->next, allocator, block->filters); |