signlk: do not hardcode the number of segment

The current scripts assume the ELF file to sign contains two segments. Instead,
generate the segment with a specific file name pattern and loop through all
files, without hardcoding any number.

Signed-off-by: Nicolas Dechesne <nicolas.dechesne@linaro.org>

signer/signlk.cpp

@@ -225,7 +225,7 @@ int main( int argc, char** argv )
        const char * data=pseg->get_data();
        if (data != NULL)  
        {
-          std::string tmpFileName = tmp_path+"/";
+          std::string tmpFileName = tmp_path+"/segment";
           char index = i+hash_offset+'0';
           tmpFileName.append(&index,1);
           saveDataToFile(tmpFileName, pseg->get_data(), pseg->get_file_size());

signlk.sh

@@ -120,8 +120,10 @@ $EXECUTABLE $INFILE $TMPOUTFILE $tmpdir
 
 openssl sha256 -binary $tmpdir/header > $tmpdir/data
 cat $tmpdir/hash>> $tmpdir/data
-openssl sha256 -binary $tmpdir/2 >> $tmpdir/data
-openssl sha256 -binary $tmpdir/3 >> $tmpdir/data
+
+for f in $tmpdir/segment*; do
+  openssl sha256 -binary $f >> $tmpdir/data
+done
 
 openssl sha256 -binary $tmpdir/data > $tmpdir/stp0
 cat $tmpdir/Si > $tmpdir/tmpDigest0