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-rw-r--r--applypatch/bspatch.cpp38
-rw-r--r--applypatch/imgpatch.cpp14
-rw-r--r--applypatch/include/applypatch/applypatch.h2
-rw-r--r--tests/component/imgdiff_test.cpp39
4 files changed, 71 insertions, 22 deletions
diff --git a/applypatch/bspatch.cpp b/applypatch/bspatch.cpp
index f75a2c680..65ee614ef 100644
--- a/applypatch/bspatch.cpp
+++ b/applypatch/bspatch.cpp
@@ -23,10 +23,14 @@
#include <stdio.h>
#include <sys/types.h>
+#include <string>
+
+#include <android-base/logging.h>
#include <bspatch.h>
#include <openssl/sha.h>
#include "applypatch/applypatch.h"
+#include "print_sha1.h"
void ShowBSDiffLicense() {
puts("The bsdiff library used herein is:\n"
@@ -67,18 +71,24 @@ int ApplyBSDiffPatch(const unsigned char* old_data, size_t old_size, const Value
if (ctx) SHA1_Update(ctx, data, len);
return len;
};
- return bsdiff::bspatch(old_data, old_size,
- reinterpret_cast<const uint8_t*>(&patch->data[patch_offset]),
- patch->data.size(), sha_sink);
-}
-int ApplyBSDiffPatchMem(const unsigned char* old_data, size_t old_size, const Value* patch,
- size_t patch_offset, std::vector<unsigned char>* new_data) {
- auto vector_sink = [new_data](const uint8_t* data, size_t len) {
- new_data->insert(new_data->end(), data, data + len);
- return len;
- };
- return bsdiff::bspatch(old_data, old_size,
- reinterpret_cast<const uint8_t*>(&patch->data[patch_offset]),
- patch->data.size(), vector_sink);
-}
+ CHECK(patch != nullptr);
+ CHECK_LE(patch_offset, patch->data.size());
+
+ int result = bsdiff::bspatch(old_data, old_size,
+ reinterpret_cast<const uint8_t*>(&patch->data[patch_offset]),
+ patch->data.size() - patch_offset, sha_sink);
+ if (result != 0) {
+ LOG(ERROR) << "bspatch failed, result: " << result;
+ // print SHA1 of the patch in the case of a data error.
+ if (result == 2) {
+ uint8_t digest[SHA_DIGEST_LENGTH];
+ SHA1(reinterpret_cast<const uint8_t*>(patch->data.data() + patch_offset),
+ patch->data.size() - patch_offset, digest);
+ std::string patch_sha1 = print_sha1(digest);
+ LOG(ERROR) << "Patch may be corrupted, offset: " << patch_offset << ", SHA1: "
+ << patch_sha1;
+ }
+ }
+ return result;
+} \ No newline at end of file
diff --git a/applypatch/imgpatch.cpp b/applypatch/imgpatch.cpp
index 3d905f7b4..702a624ae 100644
--- a/applypatch/imgpatch.cpp
+++ b/applypatch/imgpatch.cpp
@@ -200,12 +200,14 @@ int ApplyImagePatch(const unsigned char* old_data, size_t old_size, const Value*
}
// Next, apply the bsdiff patch (in memory) to the uncompressed data.
- std::vector<unsigned char> uncompressed_target_data;
- // TODO(senj): Remove the only usage of ApplyBSDiffPatchMem here,
- // replace it with ApplyBSDiffPatch with a custom sink function that
- // wraps the given sink function to stream output to save memory.
- if (ApplyBSDiffPatchMem(expanded_source.data(), expanded_len, patch, patch_offset,
- &uncompressed_target_data) != 0) {
+ std::vector<uint8_t> uncompressed_target_data;
+ // TODO: replace the custom sink function passed into ApplyBSDiffPatch so that it wraps the
+ // given sink function to stream output to save memory.
+ if (ApplyBSDiffPatch(expanded_source.data(), expanded_len, patch, patch_offset,
+ [&uncompressed_target_data](const uint8_t* data, size_t len) {
+ uncompressed_target_data.insert(uncompressed_target_data.end(), data, data + len);
+ return len;
+ }, nullptr) != 0) {
return -1;
}
if (uncompressed_target_data.size() != target_len) {
diff --git a/applypatch/include/applypatch/applypatch.h b/applypatch/include/applypatch/applypatch.h
index da55432d5..581360ef1 100644
--- a/applypatch/include/applypatch/applypatch.h
+++ b/applypatch/include/applypatch/applypatch.h
@@ -69,8 +69,6 @@ int SaveFileContents(const char* filename, const FileContents* file);
void ShowBSDiffLicense();
int ApplyBSDiffPatch(const unsigned char* old_data, size_t old_size, const Value* patch,
size_t patch_offset, SinkFn sink, SHA_CTX* ctx);
-int ApplyBSDiffPatchMem(const unsigned char* old_data, size_t old_size, const Value* patch,
- size_t patch_offset, std::vector<unsigned char>* new_data);
// imgpatch.cpp
int ApplyImagePatch(const unsigned char* old_data, size_t old_size, const Value* patch, SinkFn sink,
diff --git a/tests/component/imgdiff_test.cpp b/tests/component/imgdiff_test.cpp
index 7d00a3d53..6f5960bbd 100644
--- a/tests/component/imgdiff_test.cpp
+++ b/tests/component/imgdiff_test.cpp
@@ -551,3 +551,42 @@ TEST(ImgdiffTest, image_mode_single_entry_long) {
verify_patched_image(src, patch, tgt);
}
+
+TEST(ImgpatchTest, image_mode_patch_corruption) {
+ // 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));
+ verify_patched_image(src, patch, tgt);
+
+ // Corrupt the end of the patch and expect the ApplyImagePatch to fail.
+ patch.insert(patch.end() - 10, 10, '0');
+ ASSERT_EQ(-1, ApplyImagePatch(reinterpret_cast<const unsigned char*>(src.data()), src.size(),
+ reinterpret_cast<const unsigned char*>(patch.data()), patch.size(),
+ [](const unsigned char* /*data*/, size_t len) { return len; }));
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 08:13:37 +0100