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-rw-r--r--lunzcrash.cc66
1 files changed, 35 insertions, 31 deletions
diff --git a/lunzcrash.cc b/lunzcrash.cc
index 577d355..6267ce8 100644
--- a/lunzcrash.cc
+++ b/lunzcrash.cc
@@ -1,5 +1,5 @@
/* Lziprecover - Data recovery tool for the lzip format
- Copyright (C) 2009-2022 Antonio Diaz Diaz.
+ Copyright (C) 2009-2023 Antonio Diaz Diaz.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -37,31 +37,31 @@
namespace {
-bool verify_member( const uint8_t * const mbuffer, const long long msize,
- const unsigned dictionary_size, const char * const name,
- uint8_t digest[16] )
+bool check_member( const uint8_t * const mbuffer, const long msize,
+ const unsigned dictionary_size, const char * const name,
+ md5_type & digest )
{
MD5SUM md5sum;
LZ_mtester mtester( mbuffer, msize, dictionary_size, -1, &md5sum );
if( mtester.test_member() != 0 || !mtester.finished() )
- { show_file_error( name, "Error verifying input file." ); return false; }
+ { show_file_error( name, "Error checking input file." ); return false; }
md5sum.md5_finish( digest );
return true;
}
-bool compare_member( const uint8_t * const mbuffer, const long long msize,
+bool compare_member( const uint8_t * const mbuffer, const long msize,
const unsigned dictionary_size,
- const long long byte_pos, const uint8_t digest[16] )
+ const long long byte_pos, const md5_type & digest )
{
MD5SUM md5sum;
LZ_mtester mtester( mbuffer, msize, dictionary_size, -1, &md5sum );
bool error = ( mtester.test_member() != 0 || !mtester.finished() );
if( !error )
{
- uint8_t new_digest[16];
+ md5_type new_digest;
md5sum.md5_finish( new_digest );
- if( std::memcmp( digest, new_digest, 16 ) != 0 ) error = true;
+ if( digest != new_digest ) error = true;
}
if( error && verbosity >= 0 )
std::printf( "byte %llu comparison failed\n", byte_pos );
@@ -75,14 +75,14 @@ int test_member_rest( const LZ_mtester & master, uint8_t * const buffer2,
{
LZ_mtester mtester( master ); // tester with external buffer
mtester.duplicate_buffer( buffer2 );
- int result = mtester.test_member( LLONG_MAX, LLONG_MAX, stdout, byte_pos );
+ int result = mtester.test_member( LONG_MAX, LLONG_MAX, stdout, byte_pos );
if( result == 0 && !mtester.finished() ) result = -1; // false negative
if( result != 0 ) *failure_posp = mtester.member_position();
return result;
}
-long next_pct_pos( const Lzip_index & lzip_index, const int i, const int pct,
+long next_pct_pos( const Lzip_index & lzip_index, const long i, const int pct,
const int sector_size = 0 )
{
if( pct <= 0 ) return 0;
@@ -103,13 +103,14 @@ long next_pct_pos( const Lzip_index & lzip_index, const int i, const int pct,
/* Test 1-bit errors in LZMA streams in file.
Unless verbosity >= 1, print only the bytes with interesting results. */
-int lunzcrash_bit( const char * const input_filename )
+int lunzcrash_bit( const char * const input_filename,
+ const Cl_options & cl_opts )
{
struct stat in_stats; // not used
const int infd = open_instream( input_filename, &in_stats, false, true );
if( infd < 0 ) return 1;
- const Lzip_index lzip_index( infd, true, true );
+ const Lzip_index lzip_index( infd, cl_opts );
if( lzip_index.retval() != 0 )
{ show_file_error( input_filename, lzip_index.error().c_str() );
return lzip_index.retval(); }
@@ -122,12 +123,12 @@ int lunzcrash_bit( const char * const input_filename )
{
const long long mpos = lzip_index.mblock( i ).pos();
const long long msize = lzip_index.mblock( i ).size();
- const unsigned dictionary_size = lzip_index.dictionary_size( i );
- uint8_t * const mbuffer = read_member( infd, mpos, msize );
+ uint8_t * const mbuffer = read_member( infd, mpos, msize, input_filename );
if( !mbuffer ) return 1;
- uint8_t md5_orig[16];
- if( !verify_member( mbuffer, msize, dictionary_size, input_filename,
- md5_orig ) ) return 2;
+ const unsigned dictionary_size = lzip_index.dictionary_size( i );
+ md5_type md5_orig;
+ if( !check_member( mbuffer, msize, dictionary_size, input_filename,
+ md5_orig ) ) return 2;
long pct_pos = next_pct_pos( lzip_index, i, pct );
long pos = Lzip_header::size + 1, printed = 0; // last pos printed
const long end = msize - 20;
@@ -212,7 +213,7 @@ int lunzcrash_bit( const char * const input_filename )
if( failed_comparisons > 0 )
std::printf( ", of which\n%9ld comparisons failed\n",
failed_comparisons );
- else std::fputs( "\n all comparisons passed\n", stdout );
+ else std::fputs( "\n all comparisons passed\n", stdout );
}
else std::fputc( '\n', stdout );
}
@@ -222,13 +223,14 @@ int lunzcrash_bit( const char * const input_filename )
/* Test zeroed blocks of given size in LZMA streams in file.
Unless verbosity >= 1, print only the bytes with interesting results. */
-int lunzcrash_block( const char * const input_filename, const int sector_size )
+int lunzcrash_block( const char * const input_filename,
+ const Cl_options & cl_opts, const int sector_size )
{
struct stat in_stats; // not used
const int infd = open_instream( input_filename, &in_stats, false, true );
if( infd < 0 ) return 1;
- const Lzip_index lzip_index( infd, true, true );
+ const Lzip_index lzip_index( infd, cl_opts );
if( lzip_index.retval() != 0 )
{ show_file_error( input_filename, lzip_index.error().c_str() );
return lzip_index.retval(); }
@@ -242,16 +244,17 @@ int lunzcrash_block( const char * const input_filename, const int sector_size )
{
const long long mpos = lzip_index.mblock( i ).pos();
const long long msize = lzip_index.mblock( i ).size();
- long pos = Lzip_header::size + 1;
- const long end = msize - sector_size - 20;
- if( end <= pos ) continue; // sector_size larger than LZMA stream
- const unsigned dictionary_size = lzip_index.dictionary_size( i );
- uint8_t * const mbuffer = read_member( infd, mpos, msize );
+ // skip members with LZMA stream smaller than sector_size
+ if( msize - Lzip_header::size - 1 - 20 <= sector_size ) continue;
+ uint8_t * const mbuffer = read_member( infd, mpos, msize, input_filename );
if( !mbuffer ) return 1;
- uint8_t md5_orig[16];
- if( !verify_member( mbuffer, msize, dictionary_size, input_filename,
- md5_orig ) ) return 2;
+ const unsigned dictionary_size = lzip_index.dictionary_size( i );
+ md5_type md5_orig;
+ if( !check_member( mbuffer, msize, dictionary_size, input_filename,
+ md5_orig ) ) return 2;
long pct_pos = next_pct_pos( lzip_index, i, pct, sector_size );
+ long pos = Lzip_header::size + 1;
+ const long end = msize - sector_size - 20;
if( verbosity >= 0 ) // give a clue of the range being tested
std::printf( "Testing blocks of size %u from pos %llu to %llu\n",
sector_size, mpos + pos, mpos + end - 1 );
@@ -324,7 +327,7 @@ int lunzcrash_block( const char * const input_filename, const int sector_size )
if( failed_comparisons > 0 )
std::printf( ", of which\n%9ld comparisons failed\n",
failed_comparisons );
- else std::fputs( "\n all comparisons passed\n", stdout );
+ else std::fputs( "\n all comparisons passed\n", stdout );
}
else std::fputc( '\n', stdout );
}
@@ -348,7 +351,8 @@ int md5sum_files( const std::vector< std::string > & filenames )
if( infd < 0 ) { set_retval( retval, 1 ); continue; }
enum { buffer_size = 16384 };
- uint8_t buffer[buffer_size], md5_digest[16];
+ uint8_t buffer[buffer_size];
+ md5_type md5_digest;
MD5SUM md5sum;
while( true )
{
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-23 02:26:09 +0000