1 files changed, 85 insertions, 0 deletions
diff --git a/testsuite/unzcrash.cc b/testsuite/unzcrash.cc
new file mode 100644
index 0000000..bf44628
--- /dev/null
+++ b/testsuite/unzcrash.cc
@@ -0,0 +1,85 @@
+/*  Unzcrash - A test program written to test robustness to
+               decompression of corrupted data.
+    Inspired by unzcrash.c from Julian Seward's bzip2.
+    Copyright (C) 2008, 2009 Antonio Diaz Diaz.
+
+    This program is free software: you have unlimited permission
+    to copy, distribute and modify it.
+
+    Usage is:
+      unzcrash "lzip -tv" filename.lz
+
+    This program reads the specified file and then repeatedly
+    decompresses it, increasing 256 times each byte of the compressed
+    data, so as to test all possible one-byte errors. This should not
+    cause any invalid memory accesses. If it does, please, report it as
+    a bug.
+
+    Compile this file with the command:
+      g++ -O2 -Wall -W -o unzcrash testsuite/unzcrash.cc
+*/
+
+#include <cstdio>
+#include <cstdlib>
+#include <stdint.h>
+#include <signal.h>
+#include <unistd.h>
+
+
+int main( const int argc, const char * argv[] )
+  {
+  if( argc < 3 )
+    {
+    std::fprintf( stderr, "Usage: unzcrash \"lzip -tv\" filename.lz\n" );
+    return 1;
+    }
+
+  FILE *f = std::fopen( argv[2], "rb" );
+  if( !f )
+    {
+    std::fprintf( stderr, "Can't open file `%s' for reading\n", argv[2] );
+    return 1;
+    }
+
+  const int buffer_size = 1 << 20;
+  uint8_t buffer[buffer_size];
+  const int size = std::fread( buffer, 1, buffer_size, f );
+  if( size >= buffer_size )
+    {
+    std::fprintf( stderr, "input file `%s' too big.\n", argv[2] );
+    return 1;
+    }
+  std::fclose( f );
+
+  f = popen( argv[1], "w" );
+  if( !f )
+    {
+    std::fprintf( stderr, "incorrect parameters or too many files.\n" );
+    return 1;
+    }
+  const int wr = std::fwrite( buffer, 1, size, f );
+  if( wr != size || pclose( f ) != 0 )
+    {
+    std::fprintf( stderr, "Could not run `%s' or other error.\n", argv[1] );
+    return 1;
+    }
+
+  signal( SIGPIPE, SIG_IGN );
+
+  for( int byte = 0; byte < size; ++byte )
+    {
+    std::fprintf( stderr, "byte %d\n", byte );
+    for( int i = 0; i < 255; ++i )
+      {
+      ++buffer[byte];
+      f = popen( argv[1], "w" );
+      if( !f )
+        { std::fprintf( stderr, "Can't open pipe.\n" ); return 1; }
+      std::fwrite( buffer, 1, size, f );
+      pclose( f );
+      }
+    ++buffer[byte];
+    }
+
+  return 0;
+  }