Merge "Add tests for imgdiff."
diff --git a/applypatch/Android.mk b/applypatch/Android.mk
index fa0fe8a..61e1106 100644
--- a/applypatch/Android.mk
+++ b/applypatch/Android.mk
@@ -17,7 +17,6 @@
# libapplypatch (static library)
# ===============================
include $(CLEAR_VARS)
-LOCAL_CLANG := true
LOCAL_SRC_FILES := \
applypatch.cpp \
bspatch.cpp \
@@ -26,11 +25,11 @@
utils.cpp
LOCAL_MODULE := libapplypatch
LOCAL_MODULE_TAGS := eng
-LOCAL_C_INCLUDES += \
+LOCAL_C_INCLUDES := \
$(LOCAL_PATH)/include \
bootable/recovery
LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
-LOCAL_STATIC_LIBRARIES += \
+LOCAL_STATIC_LIBRARIES := \
libotafault \
libbase \
libcrypto \
@@ -42,36 +41,45 @@
# libimgpatch (static library)
# ===============================
include $(CLEAR_VARS)
-LOCAL_CLANG := true
-LOCAL_SRC_FILES := bspatch.cpp imgpatch.cpp utils.cpp
+LOCAL_SRC_FILES := \
+ bspatch.cpp \
+ imgpatch.cpp \
+ utils.cpp
LOCAL_MODULE := libimgpatch
-LOCAL_C_INCLUDES += \
+LOCAL_C_INCLUDES := \
$(LOCAL_PATH)/include \
bootable/recovery
LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
-LOCAL_STATIC_LIBRARIES += libcrypto libbz libz
+LOCAL_STATIC_LIBRARIES := \
+ libcrypto \
+ libbz \
+ libz
LOCAL_CFLAGS := -Werror
include $(BUILD_STATIC_LIBRARY)
# libimgpatch (host static library)
# ===============================
include $(CLEAR_VARS)
-LOCAL_CLANG := true
-LOCAL_SRC_FILES := bspatch.cpp imgpatch.cpp utils.cpp
+LOCAL_SRC_FILES := \
+ bspatch.cpp \
+ imgpatch.cpp \
+ utils.cpp
LOCAL_MODULE := libimgpatch
LOCAL_MODULE_HOST_OS := linux
-LOCAL_C_INCLUDES += \
+LOCAL_C_INCLUDES := \
$(LOCAL_PATH)/include \
bootable/recovery
LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
-LOCAL_STATIC_LIBRARIES += libcrypto libbz libz
+LOCAL_STATIC_LIBRARIES := \
+ libcrypto \
+ libbz \
+ libz
LOCAL_CFLAGS := -Werror
include $(BUILD_HOST_STATIC_LIBRARY)
# libapplypatch_modes (static library)
# ===============================
include $(CLEAR_VARS)
-LOCAL_CLANG := true
LOCAL_SRC_FILES := \
applypatch_modes.cpp
LOCAL_MODULE := libapplypatch_modes
@@ -87,7 +95,6 @@
# applypatch (target executable)
# ===============================
include $(CLEAR_VARS)
-LOCAL_CLANG := true
LOCAL_SRC_FILES := applypatch_main.cpp
LOCAL_MODULE := applypatch
LOCAL_C_INCLUDES := bootable/recovery
@@ -106,18 +113,59 @@
LOCAL_CFLAGS := -Werror
include $(BUILD_EXECUTABLE)
+libimgdiff_src_files := \
+ imgdiff.cpp \
+ utils.cpp
+
+# libbsdiff is compiled with -D_FILE_OFFSET_BITS=64.
+libimgdiff_cflags := \
+ -Werror \
+ -D_FILE_OFFSET_BITS=64
+
+libimgdiff_static_libraries := \
+ libbsdiff \
+ libz
+
+# libimgdiff (static library)
+# ===============================
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES := \
+ $(libimgdiff_src_files)
+LOCAL_MODULE := libimgdiff
+LOCAL_CFLAGS := \
+ $(libimgdiff_cflags)
+LOCAL_STATIC_LIBRARIES := \
+ $(libimgdiff_static_libraries)
+LOCAL_C_INCLUDES := \
+ $(LOCAL_PATH)/include
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
+include $(BUILD_STATIC_LIBRARY)
+
+# libimgdiff (host static library)
+# ===============================
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES := \
+ $(libimgdiff_src_files)
+LOCAL_MODULE := libimgdiff
+LOCAL_CFLAGS := \
+ $(libimgdiff_cflags)
+LOCAL_STATIC_LIBRARIES := \
+ $(libimgdiff_static_libraries)
+LOCAL_C_INCLUDES := \
+ $(LOCAL_PATH)/include
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
+include $(BUILD_HOST_STATIC_LIBRARY)
+
# imgdiff (host static executable)
# ===============================
include $(CLEAR_VARS)
-LOCAL_CLANG := true
-LOCAL_SRC_FILES := imgdiff.cpp utils.cpp
+LOCAL_SRC_FILES := imgdiff_main.cpp
LOCAL_MODULE := imgdiff
-LOCAL_STATIC_LIBRARIES += \
- libbsdiff \
- libbz \
- libdivsufsort64 \
- libdivsufsort \
- libz
LOCAL_CFLAGS := -Werror
-LOCAL_FORCE_STATIC_EXECUTABLE := true
+LOCAL_STATIC_LIBRARIES := \
+ libimgdiff \
+ $(libimgdiff_static_libraries) \
+ libbz \
+ libdivsufsort \
+ libdivsufsort64
include $(BUILD_HOST_EXECUTABLE)
diff --git a/applypatch/imgdiff.cpp b/applypatch/imgdiff.cpp
index 528daf1..18a15a1 100644
--- a/applypatch/imgdiff.cpp
+++ b/applypatch/imgdiff.cpp
@@ -121,19 +121,19 @@
* information that is stored on the system partition.
*/
+#include "applypatch/imgdiff.h"
+
#include <errno.h>
-#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
-#include <unistd.h>
#include <sys/types.h>
+#include <unistd.h>
#include <bsdiff.h>
+#include <zlib.h>
-#include "zlib.h"
-#include "imgdiff.h"
#include "utils.h"
typedef struct {
@@ -374,8 +374,7 @@
* return value when done with all the chunks. Returns NULL on
* failure.
*/
-unsigned char* ReadImage(const char* filename,
- int* num_chunks, ImageChunk** chunks) {
+unsigned char* ReadImage(const char* filename, int* num_chunks, ImageChunk** chunks) {
struct stat st;
if (stat(filename, &st) != 0) {
printf("failed to stat \"%s\": %s\n", filename, strerror(errno));
@@ -403,7 +402,7 @@
*chunks = NULL;
while (pos < sz) {
- unsigned char* p = img+pos;
+ unsigned char* p = img + pos;
if (sz - pos >= 4 &&
p[0] == 0x1f && p[1] == 0x8b &&
@@ -413,8 +412,7 @@
size_t chunk_offset = pos;
*num_chunks += 3;
- *chunks = static_cast<ImageChunk*>(realloc(*chunks,
- *num_chunks * sizeof(ImageChunk)));
+ *chunks = static_cast<ImageChunk*>(realloc(*chunks, *num_chunks * sizeof(ImageChunk)));
ImageChunk* curr = *chunks + (*num_chunks-3);
// create a normal chunk for the header.
@@ -502,8 +500,7 @@
// the decompression.
size_t footer_size = Read4(p-4);
if (footer_size != curr[-2].len) {
- printf("Error: footer size %zu != decompressed size %zu\n",
- footer_size, curr[-2].len);
+ printf("Error: footer size %zu != decompressed size %zu\n", footer_size, curr[-2].len);
free(img);
return NULL;
}
@@ -637,7 +634,11 @@
}
}
+#if defined(__ANDROID__)
+ char ptemp[] = "/data/local/tmp/imgdiff-patch-XXXXXX";
+#else
char ptemp[] = "/tmp/imgdiff-patch-XXXXXX";
+#endif
int fd = mkstemp(ptemp);
if (fd == -1) {
@@ -793,10 +794,8 @@
*num_chunks = out;
}
-ImageChunk* FindChunkByName(const char* name,
- ImageChunk* chunks, int num_chunks) {
- int i;
- for (i = 0; i < num_chunks; ++i) {
+ImageChunk* FindChunkByName(const char* name, ImageChunk* chunks, int num_chunks) {
+ for (int i = 0; i < num_chunks; ++i) {
if (chunks[i].type == CHUNK_DEFLATE && chunks[i].filename &&
strcmp(name, chunks[i].filename) == 0) {
return chunks+i;
@@ -812,11 +811,11 @@
}
}
-int main(int argc, char** argv) {
- int zip_mode = 0;
+int imgdiff(int argc, const char** argv) {
+ bool zip_mode = false;
if (argc >= 2 && strcmp(argv[1], "-z") == 0) {
- zip_mode = 1;
+ zip_mode = true;
--argc;
++argv;
}
@@ -880,12 +879,10 @@
// Verify that the source and target images have the same chunk
// structure (ie, the same sequence of deflate and normal chunks).
- if (!zip_mode) {
- // Merge the gzip header and footer in with any adjacent
- // normal chunks.
- MergeAdjacentNormalChunks(tgt_chunks, &num_tgt_chunks);
- MergeAdjacentNormalChunks(src_chunks, &num_src_chunks);
- }
+ // Merge the gzip header and footer in with any adjacent
+ // normal chunks.
+ MergeAdjacentNormalChunks(tgt_chunks, &num_tgt_chunks);
+ MergeAdjacentNormalChunks(src_chunks, &num_src_chunks);
if (num_src_chunks != num_tgt_chunks) {
printf("source and target don't have same number of chunks!\n");
@@ -897,8 +894,7 @@
}
for (i = 0; i < num_src_chunks; ++i) {
if (src_chunks[i].type != tgt_chunks[i].type) {
- printf("source and target don't have same chunk "
- "structure! (chunk %d)\n", i);
+ printf("source and target don't have same chunk structure! (chunk %d)\n", i);
printf("source chunks:\n");
DumpChunks(src_chunks, num_src_chunks);
printf("target chunks:\n");
@@ -983,8 +979,7 @@
if (zip_mode) {
ImageChunk* src;
if (tgt_chunks[i].type == CHUNK_DEFLATE &&
- (src = FindChunkByName(tgt_chunks[i].filename, src_chunks,
- num_src_chunks))) {
+ (src = FindChunkByName(tgt_chunks[i].filename, src_chunks, num_src_chunks))) {
patch_data[i] = MakePatch(src, tgt_chunks+i, patch_size+i);
} else {
patch_data[i] = MakePatch(src_chunks, tgt_chunks+i, patch_size+i);
@@ -1000,8 +995,7 @@
patch_data[i] = MakePatch(src_chunks+i, tgt_chunks+i, patch_size+i);
}
- printf("patch %3d is %zu bytes (of %zu)\n",
- i, patch_size[i], tgt_chunks[i].source_len);
+ printf("patch %3d is %zu bytes (of %zu)\n", i, patch_size[i], tgt_chunks[i].source_len);
}
// Figure out how big the imgdiff file header is going to be, so
diff --git a/applypatch/imgdiff_main.cpp b/applypatch/imgdiff_main.cpp
new file mode 100644
index 0000000..7d5bdf9
--- /dev/null
+++ b/applypatch/imgdiff_main.cpp
@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "applypatch/imgdiff.h"
+
+int main(int argc, char** argv) {
+ return imgdiff(argc, const_cast<const char**>(argv));
+}
diff --git a/applypatch/imgpatch.cpp b/applypatch/imgpatch.cpp
index 1c4409e..ae6071f 100644
--- a/applypatch/imgpatch.cpp
+++ b/applypatch/imgpatch.cpp
@@ -14,32 +14,34 @@
* limitations under the License.
*/
-// See imgdiff.c in this directory for a description of the patch file
+// See imgdiff.cpp in this directory for a description of the patch file
// format.
+#include <applypatch/imgpatch.h>
+
+#include <errno.h>
#include <stdio.h>
+#include <string.h>
#include <sys/cdefs.h>
#include <sys/stat.h>
-#include <errno.h>
#include <unistd.h>
-#include <string.h>
#include <string>
#include <vector>
-#include "zlib.h"
-#include "openssl/sha.h"
-#include "applypatch/applypatch.h"
-#include "imgdiff.h"
+#include <applypatch/applypatch.h>
+#include <applypatch/imgdiff.h>
+#include <openssl/sha.h>
+#include <zlib.h>
+
#include "utils.h"
int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size,
const unsigned char* patch_data, ssize_t patch_size,
SinkFn sink, void* token) {
- Value patch(VAL_BLOB, std::string(
- reinterpret_cast<const char*>(patch_data), patch_size));
+ Value patch(VAL_BLOB, std::string(reinterpret_cast<const char*>(patch_data), patch_size));
- return ApplyImagePatch(old_data, old_size, &patch, sink, token, nullptr, nullptr);
+ return ApplyImagePatch(old_data, old_size, &patch, sink, token, nullptr, nullptr);
}
/*
@@ -48,208 +50,201 @@
* file, and update the SHA context with the output data as well.
* Return 0 on success.
*/
-int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size,
- const Value* patch,
- SinkFn sink, void* token, SHA_CTX* ctx,
- const Value* bonus_data) {
- if (patch->data.size() < 12) {
- printf("patch too short to contain header\n");
+int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size, const Value* patch,
+ SinkFn sink, void* token, SHA_CTX* ctx, const Value* bonus_data) {
+ if (patch->data.size() < 12) {
+ printf("patch too short to contain header\n");
+ return -1;
+ }
+
+ // IMGDIFF2 uses CHUNK_NORMAL, CHUNK_DEFLATE, and CHUNK_RAW.
+ // (IMGDIFF1, which is no longer supported, used CHUNK_NORMAL and
+ // CHUNK_GZIP.)
+ size_t pos = 12;
+ const char* header = &patch->data[0];
+ if (memcmp(header, "IMGDIFF2", 8) != 0) {
+ printf("corrupt patch file header (magic number)\n");
+ return -1;
+ }
+
+ int num_chunks = Read4(header + 8);
+
+ for (int i = 0; i < num_chunks; ++i) {
+ // each chunk's header record starts with 4 bytes.
+ if (pos + 4 > patch->data.size()) {
+ printf("failed to read chunk %d record\n", i);
+ return -1;
+ }
+ int type = Read4(&patch->data[pos]);
+ pos += 4;
+
+ if (type == CHUNK_NORMAL) {
+ const char* normal_header = &patch->data[pos];
+ pos += 24;
+ if (pos > patch->data.size()) {
+ printf("failed to read chunk %d normal header data\n", i);
return -1;
- }
+ }
- // IMGDIFF2 uses CHUNK_NORMAL, CHUNK_DEFLATE, and CHUNK_RAW.
- // (IMGDIFF1, which is no longer supported, used CHUNK_NORMAL and
- // CHUNK_GZIP.)
- size_t pos = 12;
- const char* header = &patch->data[0];
- if (memcmp(header, "IMGDIFF2", 8) != 0) {
- printf("corrupt patch file header (magic number)\n");
+ size_t src_start = Read8(normal_header);
+ size_t src_len = Read8(normal_header + 8);
+ size_t patch_offset = Read8(normal_header + 16);
+
+ if (src_start + src_len > static_cast<size_t>(old_size)) {
+ printf("source data too short\n");
return -1;
- }
+ }
+ ApplyBSDiffPatch(old_data + src_start, src_len, patch, patch_offset, sink, token, ctx);
+ } else if (type == CHUNK_RAW) {
+ const char* raw_header = &patch->data[pos];
+ pos += 4;
+ if (pos > patch->data.size()) {
+ printf("failed to read chunk %d raw header data\n", i);
+ return -1;
+ }
- int num_chunks = Read4(header+8);
+ ssize_t data_len = Read4(raw_header);
- for (int i = 0; i < num_chunks; ++i) {
- // each chunk's header record starts with 4 bytes.
- if (pos + 4 > patch->data.size()) {
- printf("failed to read chunk %d record\n", i);
- return -1;
+ if (pos + data_len > patch->data.size()) {
+ printf("failed to read chunk %d raw data\n", i);
+ return -1;
+ }
+ if (ctx) SHA1_Update(ctx, &patch->data[pos], data_len);
+ if (sink(reinterpret_cast<const unsigned char*>(&patch->data[pos]), data_len, token) !=
+ data_len) {
+ printf("failed to write chunk %d raw data\n", i);
+ return -1;
+ }
+ pos += data_len;
+ } else if (type == CHUNK_DEFLATE) {
+ // deflate chunks have an additional 60 bytes in their chunk header.
+ const char* deflate_header = &patch->data[pos];
+ pos += 60;
+ if (pos > patch->data.size()) {
+ printf("failed to read chunk %d deflate header data\n", i);
+ return -1;
+ }
+
+ size_t src_start = Read8(deflate_header);
+ size_t src_len = Read8(deflate_header + 8);
+ size_t patch_offset = Read8(deflate_header + 16);
+ size_t expanded_len = Read8(deflate_header + 24);
+ size_t target_len = Read8(deflate_header + 32);
+ int level = Read4(deflate_header + 40);
+ int method = Read4(deflate_header + 44);
+ int windowBits = Read4(deflate_header + 48);
+ int memLevel = Read4(deflate_header + 52);
+ int strategy = Read4(deflate_header + 56);
+
+ if (src_start + src_len > static_cast<size_t>(old_size)) {
+ printf("source data too short\n");
+ return -1;
+ }
+
+ // Decompress the source data; the chunk header tells us exactly
+ // how big we expect it to be when decompressed.
+
+ // Note: expanded_len will include the bonus data size if
+ // the patch was constructed with bonus data. The
+ // deflation will come up 'bonus_size' bytes short; these
+ // must be appended from the bonus_data value.
+ size_t bonus_size = (i == 1 && bonus_data != NULL) ? bonus_data->data.size() : 0;
+
+ std::vector<unsigned char> expanded_source(expanded_len);
+
+ // inflate() doesn't like strm.next_out being a nullptr even with
+ // avail_out being zero (Z_STREAM_ERROR).
+ if (expanded_len != 0) {
+ z_stream strm;
+ strm.zalloc = Z_NULL;
+ strm.zfree = Z_NULL;
+ strm.opaque = Z_NULL;
+ strm.avail_in = src_len;
+ strm.next_in = const_cast<unsigned char*>(old_data + src_start);
+ strm.avail_out = expanded_len;
+ strm.next_out = expanded_source.data();
+
+ int ret = inflateInit2(&strm, -15);
+ if (ret != Z_OK) {
+ printf("failed to init source inflation: %d\n", ret);
+ return -1;
}
- int type = Read4(&patch->data[pos]);
- pos += 4;
- if (type == CHUNK_NORMAL) {
- const char* normal_header = &patch->data[pos];
- pos += 24;
- if (pos > patch->data.size()) {
- printf("failed to read chunk %d normal header data\n", i);
- return -1;
- }
-
- size_t src_start = Read8(normal_header);
- size_t src_len = Read8(normal_header+8);
- size_t patch_offset = Read8(normal_header+16);
-
- if (src_start + src_len > static_cast<size_t>(old_size)) {
- printf("source data too short\n");
- return -1;
- }
- ApplyBSDiffPatch(old_data + src_start, src_len,
- patch, patch_offset, sink, token, ctx);
- } else if (type == CHUNK_RAW) {
- const char* raw_header = &patch->data[pos];
- pos += 4;
- if (pos > patch->data.size()) {
- printf("failed to read chunk %d raw header data\n", i);
- return -1;
- }
-
- ssize_t data_len = Read4(raw_header);
-
- if (pos + data_len > patch->data.size()) {
- printf("failed to read chunk %d raw data\n", i);
- return -1;
- }
- if (ctx) SHA1_Update(ctx, &patch->data[pos], data_len);
- if (sink(reinterpret_cast<const unsigned char*>(&patch->data[pos]),
- data_len, token) != data_len) {
- printf("failed to write chunk %d raw data\n", i);
- return -1;
- }
- pos += data_len;
- } else if (type == CHUNK_DEFLATE) {
- // deflate chunks have an additional 60 bytes in their chunk header.
- const char* deflate_header = &patch->data[pos];
- pos += 60;
- if (pos > patch->data.size()) {
- printf("failed to read chunk %d deflate header data\n", i);
- return -1;
- }
-
- size_t src_start = Read8(deflate_header);
- size_t src_len = Read8(deflate_header+8);
- size_t patch_offset = Read8(deflate_header+16);
- size_t expanded_len = Read8(deflate_header+24);
- size_t target_len = Read8(deflate_header+32);
- int level = Read4(deflate_header+40);
- int method = Read4(deflate_header+44);
- int windowBits = Read4(deflate_header+48);
- int memLevel = Read4(deflate_header+52);
- int strategy = Read4(deflate_header+56);
-
- if (src_start + src_len > static_cast<size_t>(old_size)) {
- printf("source data too short\n");
- return -1;
- }
-
- // Decompress the source data; the chunk header tells us exactly
- // how big we expect it to be when decompressed.
-
- // Note: expanded_len will include the bonus data size if
- // the patch was constructed with bonus data. The
- // deflation will come up 'bonus_size' bytes short; these
- // must be appended from the bonus_data value.
- size_t bonus_size = (i == 1 && bonus_data != NULL) ? bonus_data->data.size() : 0;
-
- std::vector<unsigned char> expanded_source(expanded_len);
-
- // inflate() doesn't like strm.next_out being a nullptr even with
- // avail_out being zero (Z_STREAM_ERROR).
- if (expanded_len != 0) {
- z_stream strm;
- strm.zalloc = Z_NULL;
- strm.zfree = Z_NULL;
- strm.opaque = Z_NULL;
- strm.avail_in = src_len;
- strm.next_in = (unsigned char*)(old_data + src_start);
- strm.avail_out = expanded_len;
- strm.next_out = expanded_source.data();
-
- int ret;
- ret = inflateInit2(&strm, -15);
- if (ret != Z_OK) {
- printf("failed to init source inflation: %d\n", ret);
- return -1;
- }
-
- // Because we've provided enough room to accommodate the output
- // data, we expect one call to inflate() to suffice.
- ret = inflate(&strm, Z_SYNC_FLUSH);
- if (ret != Z_STREAM_END) {
- printf("source inflation returned %d\n", ret);
- return -1;
- }
- // We should have filled the output buffer exactly, except
- // for the bonus_size.
- if (strm.avail_out != bonus_size) {
- printf("source inflation short by %zu bytes\n", strm.avail_out-bonus_size);
- return -1;
- }
- inflateEnd(&strm);
-
- if (bonus_size) {
- memcpy(expanded_source.data() + (expanded_len - bonus_size),
- &bonus_data->data[0], bonus_size);
- }
- }
-
- // Next, apply the bsdiff patch (in memory) to the uncompressed
- // data.
- std::vector<unsigned char> uncompressed_target_data;
- if (ApplyBSDiffPatchMem(expanded_source.data(), expanded_len,
- patch, patch_offset,
- &uncompressed_target_data) != 0) {
- return -1;
- }
- if (uncompressed_target_data.size() != target_len) {
- printf("expected target len to be %zu, but it's %zu\n",
- target_len, uncompressed_target_data.size());
- return -1;
- }
-
- // Now compress the target data and append it to the output.
-
- // we're done with the expanded_source data buffer, so we'll
- // reuse that memory to receive the output of deflate.
- if (expanded_source.size() < 32768U) {
- expanded_source.resize(32768U);
- }
-
- {
- std::vector<unsigned char>& temp_data = expanded_source;
-
- // now the deflate stream
- z_stream strm;
- strm.zalloc = Z_NULL;
- strm.zfree = Z_NULL;
- strm.opaque = Z_NULL;
- strm.avail_in = uncompressed_target_data.size();
- strm.next_in = uncompressed_target_data.data();
- int ret = deflateInit2(&strm, level, method, windowBits, memLevel, strategy);
- if (ret != Z_OK) {
- printf("failed to init uncompressed data deflation: %d\n", ret);
- return -1;
- }
- do {
- strm.avail_out = temp_data.size();
- strm.next_out = temp_data.data();
- ret = deflate(&strm, Z_FINISH);
- ssize_t have = temp_data.size() - strm.avail_out;
-
- if (sink(temp_data.data(), have, token) != have) {
- printf("failed to write %zd compressed bytes to output\n",
- have);
- return -1;
- }
- if (ctx) SHA1_Update(ctx, temp_data.data(), have);
- } while (ret != Z_STREAM_END);
- deflateEnd(&strm);
- }
- } else {
- printf("patch chunk %d is unknown type %d\n", i, type);
- return -1;
+ // Because we've provided enough room to accommodate the output
+ // data, we expect one call to inflate() to suffice.
+ ret = inflate(&strm, Z_SYNC_FLUSH);
+ if (ret != Z_STREAM_END) {
+ printf("source inflation returned %d\n", ret);
+ return -1;
}
- }
+ // We should have filled the output buffer exactly, except
+ // for the bonus_size.
+ if (strm.avail_out != bonus_size) {
+ printf("source inflation short by %zu bytes\n", strm.avail_out - bonus_size);
+ return -1;
+ }
+ inflateEnd(&strm);
- return 0;
+ if (bonus_size) {
+ memcpy(expanded_source.data() + (expanded_len - bonus_size), &bonus_data->data[0],
+ bonus_size);
+ }
+ }
+
+ // Next, apply the bsdiff patch (in memory) to the uncompressed data.
+ std::vector<unsigned char> uncompressed_target_data;
+ if (ApplyBSDiffPatchMem(expanded_source.data(), expanded_len, patch, patch_offset,
+ &uncompressed_target_data) != 0) {
+ return -1;
+ }
+ if (uncompressed_target_data.size() != target_len) {
+ printf("expected target len to be %zu, but it's %zu\n", target_len,
+ uncompressed_target_data.size());
+ return -1;
+ }
+
+ // Now compress the target data and append it to the output.
+
+ // we're done with the expanded_source data buffer, so we'll
+ // reuse that memory to receive the output of deflate.
+ if (expanded_source.size() < 32768U) {
+ expanded_source.resize(32768U);
+ }
+
+ {
+ std::vector<unsigned char>& temp_data = expanded_source;
+
+ // now the deflate stream
+ z_stream strm;
+ strm.zalloc = Z_NULL;
+ strm.zfree = Z_NULL;
+ strm.opaque = Z_NULL;
+ strm.avail_in = uncompressed_target_data.size();
+ strm.next_in = uncompressed_target_data.data();
+ int ret = deflateInit2(&strm, level, method, windowBits, memLevel, strategy);
+ if (ret != Z_OK) {
+ printf("failed to init uncompressed data deflation: %d\n", ret);
+ return -1;
+ }
+ do {
+ strm.avail_out = temp_data.size();
+ strm.next_out = temp_data.data();
+ ret = deflate(&strm, Z_FINISH);
+ ssize_t have = temp_data.size() - strm.avail_out;
+
+ if (sink(temp_data.data(), have, token) != have) {
+ printf("failed to write %zd compressed bytes to output\n", have);
+ return -1;
+ }
+ if (ctx) SHA1_Update(ctx, temp_data.data(), have);
+ } while (ret != Z_STREAM_END);
+ deflateEnd(&strm);
+ }
+ } else {
+ printf("patch chunk %d is unknown type %d\n", i, type);
+ return -1;
+ }
+ }
+
+ return 0;
}
diff --git a/applypatch/imgdiff.h b/applypatch/include/applypatch/imgdiff.h
similarity index 69%
rename from applypatch/imgdiff.h
rename to applypatch/include/applypatch/imgdiff.h
index f2069b4..22cbd4f 100644
--- a/applypatch/imgdiff.h
+++ b/applypatch/include/applypatch/imgdiff.h
@@ -14,17 +14,26 @@
* limitations under the License.
*/
+#ifndef _APPLYPATCH_IMGDIFF_H
+#define _APPLYPATCH_IMGDIFF_H
+
+#include <stddef.h>
+
// Image patch chunk types
-#define CHUNK_NORMAL 0
-#define CHUNK_GZIP 1 // version 1 only
-#define CHUNK_DEFLATE 2 // version 2 only
-#define CHUNK_RAW 3 // version 2 only
+#define CHUNK_NORMAL 0
+#define CHUNK_GZIP 1 // version 1 only
+#define CHUNK_DEFLATE 2 // version 2 only
+#define CHUNK_RAW 3 // version 2 only
// The gzip header size is actually variable, but we currently don't
// support gzipped data with any of the optional fields, so for now it
// will always be ten bytes. See RFC 1952 for the definition of the
// gzip format.
-#define GZIP_HEADER_LEN 10
+static constexpr size_t GZIP_HEADER_LEN = 10;
// The gzip footer size really is fixed.
-#define GZIP_FOOTER_LEN 8
+static constexpr size_t GZIP_FOOTER_LEN = 8;
+
+int imgdiff(int argc, const char** argv);
+
+#endif // _APPLYPATCH_IMGDIFF_H
diff --git a/applypatch/include/applypatch/imgpatch.h b/applypatch/include/applypatch/imgpatch.h
index 64d9aa9..6549f79 100644
--- a/applypatch/include/applypatch/imgpatch.h
+++ b/applypatch/include/applypatch/imgpatch.h
@@ -14,13 +14,15 @@
* limitations under the License.
*/
-#ifndef _IMGPATCH_H
-#define _IMGPATCH_H
+#ifndef _APPLYPATCH_IMGPATCH_H
+#define _APPLYPATCH_IMGPATCH_H
-typedef ssize_t (*SinkFn)(const unsigned char*, ssize_t, void*);
+#include <sys/types.h>
+
+using SinkFn = ssize_t (*)(const unsigned char*, ssize_t, void*);
int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size,
const unsigned char* patch_data, ssize_t patch_size,
SinkFn sink, void* token);
-#endif //_IMGPATCH_H
+#endif // _APPLYPATCH_IMGPATCH_H
diff --git a/tests/Android.mk b/tests/Android.mk
index 17e2b7f..0aca8c6 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -65,6 +65,7 @@
component/applypatch_test.cpp \
component/bootloader_message_test.cpp \
component/edify_test.cpp \
+ component/imgdiff_test.cpp \
component/uncrypt_test.cpp \
component/updater_test.cpp \
component/verifier_test.cpp
@@ -83,6 +84,9 @@
libapplypatch_modes \
libapplypatch \
libedify \
+ libimgdiff \
+ libimgpatch \
+ libbsdiff \
libotafault \
libupdater \
libbootloader_message \
@@ -90,6 +94,8 @@
libminui \
libotautil \
libmounts \
+ libdivsufsort \
+ libdivsufsort64 \
libfs_mgr \
liblog \
libselinux \
@@ -130,3 +136,26 @@
LOCAL_PICKUP_FILES := $(testdata_continuous_zip_prefix)
include $(BUILD_NATIVE_TEST)
+
+# Host tests
+include $(CLEAR_VARS)
+LOCAL_CFLAGS := -Werror
+LOCAL_MODULE := recovery_host_test
+LOCAL_MODULE_HOST_OS := linux
+LOCAL_C_INCLUDES := bootable/recovery
+LOCAL_SRC_FILES := \
+ component/imgdiff_test.cpp
+LOCAL_STATIC_LIBRARIES := \
+ libimgdiff \
+ libimgpatch \
+ libbsdiff \
+ libziparchive \
+ libbase \
+ libcrypto \
+ libbz \
+ libdivsufsort64 \
+ libdivsufsort \
+ libz
+LOCAL_SHARED_LIBRARIES := \
+ liblog
+include $(BUILD_HOST_NATIVE_TEST)
diff --git a/tests/component/imgdiff_test.cpp b/tests/component/imgdiff_test.cpp
new file mode 100644
index 0000000..3711859
--- /dev/null
+++ b/tests/component/imgdiff_test.cpp
@@ -0,0 +1,448 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <string>
+#include <vector>
+
+#include <android-base/file.h>
+#include <android-base/test_utils.h>
+#include <applypatch/imgdiff.h>
+#include <applypatch/imgpatch.h>
+#include <gtest/gtest.h>
+#include <ziparchive/zip_writer.h>
+
+#include "applypatch/utils.h"
+
+static ssize_t MemorySink(const unsigned char* data, ssize_t len, void* token) {
+ std::string* s = static_cast<std::string*>(token);
+ s->append(reinterpret_cast<const char*>(data), len);
+ return len;
+}
+
+// Sanity check for the given imgdiff patch header.
+static void verify_patch_header(const std::string& patch, size_t* num_normal, size_t* num_raw,
+ size_t* num_deflate) {
+ const size_t size = patch.size();
+ const char* data = patch.data();
+
+ ASSERT_GE(size, 12U);
+ ASSERT_EQ("IMGDIFF2", std::string(data, 8));
+
+ const int num_chunks = Read4(data + 8);
+ ASSERT_GE(num_chunks, 0);
+
+ size_t normal = 0;
+ size_t raw = 0;
+ size_t deflate = 0;
+
+ size_t pos = 12;
+ for (int i = 0; i < num_chunks; ++i) {
+ ASSERT_LE(pos + 4, size);
+ int type = Read4(data + pos);
+ pos += 4;
+ if (type == CHUNK_NORMAL) {
+ pos += 24;
+ ASSERT_LE(pos, size);
+ normal++;
+ } else if (type == CHUNK_RAW) {
+ ASSERT_LE(pos + 4, size);
+ ssize_t data_len = Read4(data + pos);
+ ASSERT_GT(data_len, 0);
+ pos += 4 + data_len;
+ ASSERT_LE(pos, size);
+ raw++;
+ } else if (type == CHUNK_DEFLATE) {
+ pos += 60;
+ ASSERT_LE(pos, size);
+ deflate++;
+ } else {
+ FAIL() << "Invalid patch type: " << type;
+ }
+ }
+
+ if (num_normal != nullptr) *num_normal = normal;
+ if (num_raw != nullptr) *num_raw = raw;
+ if (num_deflate != nullptr) *num_deflate = deflate;
+}
+
+TEST(ImgdiffTest, invalid_args) {
+ // Insufficient inputs.
+ ASSERT_EQ(2, imgdiff(1, (const char* []){ "imgdiff" }));
+ ASSERT_EQ(2, imgdiff(2, (const char* []){ "imgdiff", "-z" }));
+ ASSERT_EQ(2, imgdiff(2, (const char* []){ "imgdiff", "-b" }));
+ ASSERT_EQ(2, imgdiff(3, (const char* []){ "imgdiff", "-z", "-b" }));
+
+ // Failed to read bonus file.
+ ASSERT_EQ(1, imgdiff(3, (const char* []){ "imgdiff", "-b", "doesntexist" }));
+
+ // Failed to read input files.
+ ASSERT_EQ(1, imgdiff(4, (const char* []){ "imgdiff", "doesntexist", "doesntexist", "output" }));
+ ASSERT_EQ(
+ 1, imgdiff(5, (const char* []){ "imgdiff", "-z", "doesntexist", "doesntexist", "output" }));
+}
+
+TEST(ImgdiffTest, image_mode_smoke) {
+ // Random bytes.
+ const std::string src("abcdefg");
+ TemporaryFile src_file;
+ ASSERT_TRUE(android::base::WriteStringToFile(src, src_file.path));
+
+ const std::string tgt("abcdefgxyz");
+ TemporaryFile tgt_file;
+ ASSERT_TRUE(android::base::WriteStringToFile(tgt, tgt_file.path));
+
+ TemporaryFile patch_file;
+ std::vector<const char*> args = {
+ "imgdiff", src_file.path, tgt_file.path, patch_file.path,
+ };
+ ASSERT_EQ(0, imgdiff(args.size(), args.data()));
+
+ // Verify.
+ std::string patch;
+ ASSERT_TRUE(android::base::ReadFileToString(patch_file.path, &patch));
+
+ // Expect one CHUNK_RAW entry.
+ size_t num_normal;
+ size_t num_raw;
+ size_t num_deflate;
+ verify_patch_header(patch, &num_normal, &num_raw, &num_deflate);
+ ASSERT_EQ(0U, num_normal);
+ ASSERT_EQ(0U, num_deflate);
+ ASSERT_EQ(1U, num_raw);
+
+ std::string patched;
+ ASSERT_EQ(0, ApplyImagePatch(reinterpret_cast<const unsigned char*>(src.data()), src.size(),
+ reinterpret_cast<const unsigned char*>(patch.data()), patch.size(),
+ MemorySink, &patched));
+ ASSERT_EQ(tgt, patched);
+}
+
+TEST(ImgdiffTest, zip_mode_smoke_store) {
+ // Construct src and tgt zip files.
+ TemporaryFile src_file;
+ FILE* src_file_ptr = fdopen(src_file.fd, "wb");
+ ZipWriter src_writer(src_file_ptr);
+ ASSERT_EQ(0, src_writer.StartEntry("file1.txt", 0)); // Store mode.
+ const std::string src_content("abcdefg");
+ ASSERT_EQ(0, src_writer.WriteBytes(src_content.data(), src_content.size()));
+ ASSERT_EQ(0, src_writer.FinishEntry());
+ ASSERT_EQ(0, src_writer.Finish());
+ ASSERT_EQ(0, fclose(src_file_ptr));
+
+ TemporaryFile tgt_file;
+ FILE* tgt_file_ptr = fdopen(tgt_file.fd, "wb");
+ ZipWriter tgt_writer(tgt_file_ptr);
+ ASSERT_EQ(0, tgt_writer.StartEntry("file1.txt", 0)); // Store mode.
+ const std::string tgt_content("abcdefgxyz");
+ ASSERT_EQ(0, tgt_writer.WriteBytes(tgt_content.data(), tgt_content.size()));
+ ASSERT_EQ(0, tgt_writer.FinishEntry());
+ ASSERT_EQ(0, tgt_writer.Finish());
+ ASSERT_EQ(0, fclose(tgt_file_ptr));
+
+ // Compute patch.
+ TemporaryFile patch_file;
+ std::vector<const char*> args = {
+ "imgdiff", "-z", src_file.path, tgt_file.path, patch_file.path,
+ };
+ ASSERT_EQ(0, imgdiff(args.size(), args.data()));
+
+ // Verify.
+ std::string tgt;
+ ASSERT_TRUE(android::base::ReadFileToString(tgt_file.path, &tgt));
+ std::string src;
+ ASSERT_TRUE(android::base::ReadFileToString(src_file.path, &src));
+ std::string patch;
+ ASSERT_TRUE(android::base::ReadFileToString(patch_file.path, &patch));
+
+ // Expect one CHUNK_RAW entry.
+ size_t num_normal;
+ size_t num_raw;
+ size_t num_deflate;
+ verify_patch_header(patch, &num_normal, &num_raw, &num_deflate);
+ ASSERT_EQ(0U, num_normal);
+ ASSERT_EQ(0U, num_deflate);
+ ASSERT_EQ(1U, num_raw);
+
+ std::string patched;
+ ASSERT_EQ(0, ApplyImagePatch(reinterpret_cast<const unsigned char*>(src.data()), src.size(),
+ reinterpret_cast<const unsigned char*>(patch.data()), patch.size(),
+ MemorySink, &patched));
+ ASSERT_EQ(tgt, patched);
+}
+
+TEST(ImgdiffTest, zip_mode_smoke_compressed) {
+ // Construct src and tgt zip files.
+ TemporaryFile src_file;
+ FILE* src_file_ptr = fdopen(src_file.fd, "wb");
+ ZipWriter src_writer(src_file_ptr);
+ ASSERT_EQ(0, src_writer.StartEntry("file1.txt", ZipWriter::kCompress));
+ const std::string src_content("abcdefg");
+ ASSERT_EQ(0, src_writer.WriteBytes(src_content.data(), src_content.size()));
+ ASSERT_EQ(0, src_writer.FinishEntry());
+ ASSERT_EQ(0, src_writer.Finish());
+ ASSERT_EQ(0, fclose(src_file_ptr));
+
+ TemporaryFile tgt_file;
+ FILE* tgt_file_ptr = fdopen(tgt_file.fd, "wb");
+ ZipWriter tgt_writer(tgt_file_ptr);
+ ASSERT_EQ(0, tgt_writer.StartEntry("file1.txt", ZipWriter::kCompress));
+ const std::string tgt_content("abcdefgxyz");
+ ASSERT_EQ(0, tgt_writer.WriteBytes(tgt_content.data(), tgt_content.size()));
+ ASSERT_EQ(0, tgt_writer.FinishEntry());
+ ASSERT_EQ(0, tgt_writer.Finish());
+ ASSERT_EQ(0, fclose(tgt_file_ptr));
+
+ // Compute patch.
+ TemporaryFile patch_file;
+ std::vector<const char*> args = {
+ "imgdiff", "-z", src_file.path, tgt_file.path, patch_file.path,
+ };
+ ASSERT_EQ(0, imgdiff(args.size(), args.data()));
+
+ // Verify.
+ std::string tgt;
+ ASSERT_TRUE(android::base::ReadFileToString(tgt_file.path, &tgt));
+ std::string src;
+ ASSERT_TRUE(android::base::ReadFileToString(src_file.path, &src));
+ std::string patch;
+ ASSERT_TRUE(android::base::ReadFileToString(patch_file.path, &patch));
+
+ // Expect three entries: CHUNK_RAW (header) + CHUNK_DEFLATE (data) + CHUNK_RAW (footer).
+ size_t num_normal;
+ size_t num_raw;
+ size_t num_deflate;
+ verify_patch_header(patch, &num_normal, &num_raw, &num_deflate);
+ ASSERT_EQ(0U, num_normal);
+ ASSERT_EQ(1U, num_deflate);
+ ASSERT_EQ(2U, num_raw);
+
+ std::string patched;
+ ASSERT_EQ(0, ApplyImagePatch(reinterpret_cast<const unsigned char*>(src.data()), src.size(),
+ reinterpret_cast<const unsigned char*>(patch.data()), patch.size(),
+ MemorySink, &patched));
+ ASSERT_EQ(tgt, patched);
+}
+
+TEST(ImgdiffTest, image_mode_simple) {
+ // src: "abcdefgh" + gzipped "xyz" (echo -n "xyz" | gzip -f | hd).
+ const std::vector<char> src_data = { 'a', 'b', 'c', 'd', 'e', 'f', 'g',
+ 'h', '\x1f', '\x8b', '\x08', '\x00', '\xc4', '\x1e',
+ '\x53', '\x58', '\x00', '\x03', '\xab', '\xa8', '\xac',
+ '\x02', '\x00', '\x67', '\xba', '\x8e', '\xeb', '\x03',
+ '\x00', '\x00', '\x00' };
+ const std::string src(src_data.cbegin(), src_data.cend());
+ TemporaryFile src_file;
+ ASSERT_TRUE(android::base::WriteStringToFile(src, src_file.path));
+
+ // tgt: "abcdefgxyz" + gzipped "xxyyzz".
+ const std::vector<char> tgt_data = {
+ 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'x', 'y', 'z', '\x1f', '\x8b',
+ '\x08', '\x00', '\x62', '\x1f', '\x53', '\x58', '\x00', '\x03', '\xab', '\xa8', '\xa8', '\xac',
+ '\xac', '\xaa', '\x02', '\x00', '\x96', '\x30', '\x06', '\xb7', '\x06', '\x00', '\x00', '\x00'
+ };
+ const std::string tgt(tgt_data.cbegin(), tgt_data.cend());
+ TemporaryFile tgt_file;
+ ASSERT_TRUE(android::base::WriteStringToFile(tgt, tgt_file.path));
+
+ TemporaryFile patch_file;
+ std::vector<const char*> args = {
+ "imgdiff", src_file.path, tgt_file.path, patch_file.path,
+ };
+ ASSERT_EQ(0, imgdiff(args.size(), args.data()));
+
+ // Verify.
+ std::string patch;
+ ASSERT_TRUE(android::base::ReadFileToString(patch_file.path, &patch));
+
+ // Expect three entries: CHUNK_RAW (header) + CHUNK_DEFLATE (data) + CHUNK_RAW (footer).
+ size_t num_normal;
+ size_t num_raw;
+ size_t num_deflate;
+ verify_patch_header(patch, &num_normal, &num_raw, &num_deflate);
+ ASSERT_EQ(0U, num_normal);
+ ASSERT_EQ(1U, num_deflate);
+ ASSERT_EQ(2U, num_raw);
+
+ std::string patched;
+ ASSERT_EQ(0, ApplyImagePatch(reinterpret_cast<const unsigned char*>(src.data()), src.size(),
+ reinterpret_cast<const unsigned char*>(patch.data()), patch.size(),
+ MemorySink, &patched));
+ ASSERT_EQ(tgt, patched);
+}
+
+TEST(ImgdiffTest, image_mode_different_num_chunks) {
+ // src: "abcdefgh" + gzipped "xyz" (echo -n "xyz" | gzip -f | hd) + gzipped "test".
+ const std::vector<char> src_data = {
+ 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', '\x1f', '\x8b', '\x08',
+ '\x00', '\xc4', '\x1e', '\x53', '\x58', '\x00', '\x03', '\xab', '\xa8', '\xac', '\x02',
+ '\x00', '\x67', '\xba', '\x8e', '\xeb', '\x03', '\x00', '\x00', '\x00', '\x1f', '\x8b',
+ '\x08', '\x00', '\xb2', '\x3a', '\x53', '\x58', '\x00', '\x03', '\x2b', '\x49', '\x2d',
+ '\x2e', '\x01', '\x00', '\x0c', '\x7e', '\x7f', '\xd8', '\x04', '\x00', '\x00', '\x00'
+ };
+ const std::string src(src_data.cbegin(), src_data.cend());
+ TemporaryFile src_file;
+ ASSERT_TRUE(android::base::WriteStringToFile(src, src_file.path));
+
+ // tgt: "abcdefgxyz" + gzipped "xxyyzz".
+ const std::vector<char> tgt_data = {
+ 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'x', 'y', 'z', '\x1f', '\x8b',
+ '\x08', '\x00', '\x62', '\x1f', '\x53', '\x58', '\x00', '\x03', '\xab', '\xa8', '\xa8', '\xac',
+ '\xac', '\xaa', '\x02', '\x00', '\x96', '\x30', '\x06', '\xb7', '\x06', '\x00', '\x00', '\x00'
+ };
+ const std::string tgt(tgt_data.cbegin(), tgt_data.cend());
+ TemporaryFile tgt_file;
+ ASSERT_TRUE(android::base::WriteStringToFile(tgt, tgt_file.path));
+
+ TemporaryFile patch_file;
+ std::vector<const char*> args = {
+ "imgdiff", src_file.path, tgt_file.path, patch_file.path,
+ };
+ ASSERT_EQ(1, imgdiff(args.size(), args.data()));
+}
+
+TEST(ImgdiffTest, image_mode_merge_chunks) {
+ // src: "abcdefgh" + gzipped "xyz" (echo -n "xyz" | gzip -f | hd).
+ const std::vector<char> src_data = { 'a', 'b', 'c', 'd', 'e', 'f', 'g',
+ 'h', '\x1f', '\x8b', '\x08', '\x00', '\xc4', '\x1e',
+ '\x53', '\x58', '\x00', '\x03', '\xab', '\xa8', '\xac',
+ '\x02', '\x00', '\x67', '\xba', '\x8e', '\xeb', '\x03',
+ '\x00', '\x00', '\x00' };
+ const std::string src(src_data.cbegin(), src_data.cend());
+ TemporaryFile src_file;
+ ASSERT_TRUE(android::base::WriteStringToFile(src, src_file.path));
+
+ // tgt: gzipped "xyz" + "abcdefgh".
+ const std::vector<char> tgt_data = {
+ '\x1f', '\x8b', '\x08', '\x00', '\x62', '\x1f', '\x53', '\x58', '\x00', '\x03', '\xab', '\xa8',
+ '\xa8', '\xac', '\xac', '\xaa', '\x02', '\x00', '\x96', '\x30', '\x06', '\xb7', '\x06', '\x00',
+ '\x00', '\x00', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'x', 'y', 'z'
+ };
+ const std::string tgt(tgt_data.cbegin(), tgt_data.cend());
+ TemporaryFile tgt_file;
+ ASSERT_TRUE(android::base::WriteStringToFile(tgt, tgt_file.path));
+
+ // Since a gzipped entry will become CHUNK_RAW (header) + CHUNK_DEFLATE (data) +
+ // CHUNK_RAW (footer), they both should contain the same chunk types after merging.
+
+ TemporaryFile patch_file;
+ std::vector<const char*> args = {
+ "imgdiff", src_file.path, tgt_file.path, patch_file.path,
+ };
+ ASSERT_EQ(0, imgdiff(args.size(), args.data()));
+
+ // Verify.
+ std::string patch;
+ ASSERT_TRUE(android::base::ReadFileToString(patch_file.path, &patch));
+
+ // Expect three entries: CHUNK_RAW (header) + CHUNK_DEFLATE (data) + CHUNK_RAW (footer).
+ size_t num_normal;
+ size_t num_raw;
+ size_t num_deflate;
+ verify_patch_header(patch, &num_normal, &num_raw, &num_deflate);
+ ASSERT_EQ(0U, num_normal);
+ ASSERT_EQ(1U, num_deflate);
+ ASSERT_EQ(2U, num_raw);
+
+ std::string patched;
+ ASSERT_EQ(0, ApplyImagePatch(reinterpret_cast<const unsigned char*>(src.data()), src.size(),
+ reinterpret_cast<const unsigned char*>(patch.data()), patch.size(),
+ MemorySink, &patched));
+ ASSERT_EQ(tgt, patched);
+}
+
+TEST(ImgdiffTest, image_mode_spurious_magic) {
+ // src: "abcdefgh" + '0x1f8b0b00' + some bytes.
+ const std::vector<char> src_data = { 'a', 'b', 'c', 'd', 'e', 'f', 'g',
+ 'h', '\x1f', '\x8b', '\x08', '\x00', '\xc4', '\x1e',
+ '\x53', '\x58', 't', 'e', 's', 't' };
+ const std::string src(src_data.cbegin(), src_data.cend());
+ TemporaryFile src_file;
+ ASSERT_TRUE(android::base::WriteStringToFile(src, src_file.path));
+
+ // tgt: "abcdefgxyz".
+ const std::vector<char> tgt_data = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'x', 'y', 'z' };
+ const std::string tgt(tgt_data.cbegin(), tgt_data.cend());
+ TemporaryFile tgt_file;
+ ASSERT_TRUE(android::base::WriteStringToFile(tgt, tgt_file.path));
+
+ TemporaryFile patch_file;
+ std::vector<const char*> args = {
+ "imgdiff", src_file.path, tgt_file.path, patch_file.path,
+ };
+ ASSERT_EQ(0, imgdiff(args.size(), args.data()));
+
+ // Verify.
+ std::string patch;
+ ASSERT_TRUE(android::base::ReadFileToString(patch_file.path, &patch));
+
+ // Expect one CHUNK_RAW (header) entry.
+ size_t num_normal;
+ size_t num_raw;
+ size_t num_deflate;
+ verify_patch_header(patch, &num_normal, &num_raw, &num_deflate);
+ ASSERT_EQ(0U, num_normal);
+ ASSERT_EQ(0U, num_deflate);
+ ASSERT_EQ(1U, num_raw);
+
+ std::string patched;
+ ASSERT_EQ(0, ApplyImagePatch(reinterpret_cast<const unsigned char*>(src.data()), src.size(),
+ reinterpret_cast<const unsigned char*>(patch.data()), patch.size(),
+ MemorySink, &patched));
+ ASSERT_EQ(tgt, patched);
+}
+
+TEST(ImgdiffTest, image_mode_single_entry_long) {
+ // src: "abcdefgh" + '0x1f8b0b00' + some bytes.
+ const std::vector<char> src_data = { 'a', 'b', 'c', 'd', 'e', 'f', 'g',
+ 'h', '\x1f', '\x8b', '\x08', '\x00', '\xc4', '\x1e',
+ '\x53', '\x58', 't', 'e', 's', 't' };
+ const std::string src(src_data.cbegin(), src_data.cend());
+ TemporaryFile src_file;
+ ASSERT_TRUE(android::base::WriteStringToFile(src, src_file.path));
+
+ // tgt: "abcdefgxyz" + 200 bytes.
+ std::vector<char> tgt_data = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'x', 'y', 'z' };
+ tgt_data.resize(tgt_data.size() + 200);
+
+ const std::string tgt(tgt_data.cbegin(), tgt_data.cend());
+ TemporaryFile tgt_file;
+ ASSERT_TRUE(android::base::WriteStringToFile(tgt, tgt_file.path));
+
+ TemporaryFile patch_file;
+ std::vector<const char*> args = {
+ "imgdiff", src_file.path, tgt_file.path, patch_file.path,
+ };
+ ASSERT_EQ(0, imgdiff(args.size(), args.data()));
+
+ // Verify.
+ std::string patch;
+ ASSERT_TRUE(android::base::ReadFileToString(patch_file.path, &patch));
+
+ // Expect one CHUNK_NORMAL entry, since it's exceeding the 160-byte limit for RAW.
+ size_t num_normal;
+ size_t num_raw;
+ size_t num_deflate;
+ verify_patch_header(patch, &num_normal, &num_raw, &num_deflate);
+ ASSERT_EQ(1U, num_normal);
+ ASSERT_EQ(0U, num_deflate);
+ ASSERT_EQ(0U, num_raw);
+
+ std::string patched;
+ ASSERT_EQ(0, ApplyImagePatch(reinterpret_cast<const unsigned char*>(src.data()), src.size(),
+ reinterpret_cast<const unsigned char*>(patch.data()), patch.size(),
+ MemorySink, &patched));
+ ASSERT_EQ(tgt, patched);
+}