For reasons that I am not understand yet, using the libmd version of

SHA256 would make libarchive based application to give:

	archive_read_extract(): Lzma library error: Corrupted input data

(Internally this is LZMA_DATA_ERR)

However, the libmd version of SHA256 is supposed to give same result
as the bundled version do, and xz(1) is not affected.

As a precaution, revert the SHA256 portion of r281316 for now until
we figure out why it breaks libarchive interoperability as we can't
yet rule out this change have introduced an ABI breakage.

lib/liblzma/Makefile

@@ -77,7 +77,8 @@ SRCS+=	common.c \
 .PATH: ${LZMADIR}/check
 SRCS+=	check.c \
 	crc32_table.c \
-	crc64_table.c
+	crc64_table.c \
+	sha256.c
 .if defined(MACHINE_ARCH) && ${MACHINE_ARCH} == "i386"
 SRCS+=	crc32_x86.S \
 	crc64_x86.S
@@ -145,7 +146,7 @@ CFLAGS+=	-DHAVE_CONFIG_H \
 		-I${LZMADIR}/simple \
 		-I${LZMADIR}/../common
 
-LIBADD+=	md pthread
+LIBADD+=	pthread
 
 VERSION_DEF=	${.CURDIR}/Versions.def
 SYMBOL_MAPS=	${.CURDIR}/Symbol.map

lib/liblzma/Symbol.map

@@ -180,6 +180,9 @@ XZprivate_1.0 {
 	lzma_raw_coder_memusage;
 	lzma_raw_decoder_init;
 	lzma_raw_encoder_init;
+	lzma_sha256_finish;
+	lzma_sha256_init;
+	lzma_sha256_update;
 	lzma_simple_arm_decoder_init;
 	lzma_simple_arm_encoder_init;
 	lzma_simple_armthumb_decoder_init;

lib/liblzma/config.h

@@ -203,13 +203,16 @@
 /* #undef HAVE_SHA256INIT */
 
 /* Define to 1 if the system has the type `SHA256_CTX'. */
-#define HAVE_SHA256_CTX 1
+/* FreeBSD - disabled libmd SHA256 for now */
+/* #undef HAVE_SHA256_CTX */
 
 /* Define to 1 if you have the <sha256.h> header file. */
-#define HAVE_SHA256_H 1
+/* FreeBSD - disabled libmd SHA256 for now */
+/* #undef HAVE_SHA256_H */
 
 /* Define to 1 if you have the `SHA256_Init' function. */
-#define HAVE_SHA256_INIT 1
+/* FreeBSD - disabled libmd SHA256 for now */
+/* #undef HAVE_SHA256_INIT */
 
 /* Define to 1 if the system has the type `SHA2_CTX'. */
 /* #undef HAVE_SHA2_CTX */