1 files changed, 63 insertions, 0 deletions
diff --git a/batch/removeGccVersion.py b/batch/removeGccVersion.py
new file mode 100755
index 0000000..b88f581
--- /dev/null
+++ b/batch/removeGccVersion.py
@@ -0,0 +1,63 @@
+#!/usr/bin/env python2.7
+
+import sys
+import struct
+import os
+
+# replaces 'GCC: (GNU) 4.9.4' with zeroes (.rdata$zzz)
+needle  = '\x47\x43\x43\x3a\x20\x28\x47\x4e\x55\x29\x20\x34\x2e\x39\x2e\x34'
+# zeroing major+minor linker version (0x010b = magic, 0x02 major, 0x19 minor => GNU ld 2.25)
+needle2 = '\x0b\x01\x02\x19'
+
+def main(argv):
+    found    = 0
+    absfound = 0
+    buf      = bytearray()
+    with open(argv[0], "rb") as fin:
+        for line in fin:
+            buf += line
+    with open(argv[0], "wb") as fout:
+        pos = str(buf).find(needle)
+        while pos > -1:
+            poslen = 0
+            if pos > -1:
+                for v in buf[pos:]:
+                    if v == 0:
+                        break
+                    poslen += 1
+                buf[pos:pos+poslen] = '\x00'*poslen
+                found += 1
+                absfound += poslen
+            pos = str(buf).find(needle)
+
+        pos = str(buf).find(needle2)
+        ldsig = False
+        if pos > -1 and pos <= 0x200:
+            ldsig = True
+            buf[pos+2] = '\x00'
+            buf[pos+3] = '\x00'
+
+        fout.write(str(buf))
+        fout.flush()
+    return ( bool(ldsig), int(found), int(absfound) )
+
+if __name__ == "__main__":
+    bname = os.path.basename(sys.argv[0])
+    if len(sys.argv) < 2:
+        sys.stderr.write(bname + ' usage: ' + sys.argv[0] + ' [WIN32_PE]\n')
+        sys.exit(1)
+    if not os.access(sys.argv[1], os.W_OK):
+        sys.stderr.write(bname + ': No write access: ' + sys.argv[1] + '\n')
+        sys.exit(2)
+    print bname + ': Searching for GCC Fingerprint:', needle.encode('hex')
+    (ldsig, found, abslen) = main(sys.argv[1:])
+    if found > 0:
+        print bname + ': Found', found, 'occurences; Zero\'d:', found * len(needle) + abslen, 'bytes'
+    else:
+        print bname + ': None found .. (.rdata$zzz already removed)'
+    if ldsig:
+        print bname + ': Linker signature removed ..'
+    else:
+        print bname + ': No Linker signature found'
+
+    sys.exit(0)