LZMA: Add a version of ulzma which takes the input and output buffer sizes.

This new version is used to implement the version which doesn't take the
input and output buffer sizes.

Old-Change-Id: I8935024aca0849bc939263d7fc3036c586e63c68
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/65510
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Stefan Reinauer <reinauer@google.com>
Tested-by: Gabe Black <gabeblack@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit 465d167ad2f6a67d0b2c91fb6c68c8f9a09dd395)

libpayload: Make lzma truncation non-fatal.

If the size the lzma header claims it needs is bigger than the space we have,
print a message and continue rather than erroring out. Apparently the encoder
is lazy sometimes and just puts a large value there regardless of what the
actual size is.

This was the original intention for this code, but an outdated version of the
patch ended up being submitted.

Old-Change-Id: Ibcf7ac0fd4b65ce85377421a4ee67b82d92d29d3
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/66235
Reviewed-by: Stefan Reinauer <reinauer@google.com>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit 30c628eeada274fc8b94f8f69f9df4f33cbfc773)

Squashed two related commits and updated the commit message to be
more clear.

Change-Id: I484b5c1e3809781033d146609a35a9e5e666c8ed
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6408
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

1 files changed, 10 insertions, 2 deletions

diff --git a/payloads/libpayload/include/lzma.h b/payloads/libpayload/include/lzma.h
index 818c16da1e..523bc8c99e 100644
--- a/payloads/libpayload/include/lzma.h
+++ b/payloads/libpayload/include/lzma.h
@@ -30,10 +30,18 @@
 #ifndef _LZMA_H
 #define _LZMA_H
 
-/* decompresses the data stream at src to dst, determining its length from
+/* Decompresses the data stream at src to dst. The sizes of the source and
+ * destination buffers are in srcn and dstn.
+ *
+ * Returns the decompressed size, or 0 on error
+ */
+unsigned long ulzman(const unsigned char *src, unsigned long srcn,
+		     unsigned char *dst, unsigned long dstn);
+
+/* Decompresses the data stream at src to dst, determining its length from
  * the data stream itself.
  *
- * returns the decompressed size, or 0 on error
+ * Returns the decompressed size, or 0 on error
  */
 unsigned long ulzma(const unsigned char *src, unsigned char *dst);