Added support for ignoring specific file and path patterns with .fileignore

.fileignore

@@ -0,0 +1,5 @@
+# Use UNIX style pattern matching to select files for truffleHog to ignore. Use slashes for directory matching.
+# Examples:
+# *.md
+# LICENSE
+# temp/*

truffleHog/truffleHog.py

@@ -10,25 +10,45 @@
 import os
 import json
 import stat
+import fnmatch
 from git import Repo
 
 def main():
     parser = argparse.ArgumentParser(description='Find secrets hidden in the depths of git.')
     parser.add_argument('--json', dest="output_json", action="store_true", help="Output in JSON")
     parser.add_argument('git_url', type=str, help='URL for secret searching')
+
+    # if the .fileignore file exists, attempt to import file patterns
+    try:
+        with open('.fileignore', 'r') as f:
+            for line in f:
+                if not (line[0] == "#"):
+                    file_filter_patterns.append(line.rstrip())
+    except:
+        pass
+
     args = parser.parse_args()
     output = find_strings(args.git_url, args.output_json)
     project_path = output["project_path"]
     shutil.rmtree(project_path, onerror=del_rw)
 
-
 BASE64_CHARS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="
 HEX_CHARS = "1234567890abcdefABCDEF"
 
 def del_rw(action, name, exc):
     os.chmod(name, stat.S_IWRITE)
     os.remove(name)
 
+file_filter_patterns = []
+
+def pathfilter(path):
+    for pat in file_filter_patterns:
+        if ("/" in pat) or ("\\" in pat):
+            if fnmatch.fnmatch(path, pat): return None
+        else:
+            if fnmatch.fnmatch(os.path.basename(path), pat): return None
+    return path
+
 def shannon_entropy(data, iterator):
     """
     Borrowed from http://blog.dkbza.org/2007/05/scanning-data-for-entropy-anomalies.html
@@ -99,6 +119,13 @@ def find_strings(git_url, printJson=False):
                 diff = prev_commit.diff(curr_commit, create_patch=True)
                 for blob in diff:
                     #print i.a_blob.data_stream.read()
+                    if blob.a_path:
+                        path = blob.a_path
+                    else:
+                        path = blob.b_path
+                    if path:
+                        if not pathfilter(path):
+                            continue
                     printableDiff = blob.diff.decode('utf-8', errors='replace')
                     if printableDiff.startswith("Binary files"):
                         continue
@@ -121,15 +148,17 @@ def find_strings(git_url, printJson=False):
                     if len(stringsFound) > 0:
                         commit_time =  datetime.datetime.fromtimestamp(prev_commit.committed_date).strftime('%Y-%m-%d %H:%M:%S')
                         entropicDiff = {}
+                        entropicDiff['file'] = str(path)
                         entropicDiff['date'] = commit_time
                         entropicDiff['branch'] = branch_name
                         entropicDiff['commit'] = prev_commit.message
-                        entropicDiff['diff'] = blob.diff.decode('utf-8', errors='replace') 
+                        entropicDiff['diff'] = blob.diff.decode('utf-8', errors='replace')
                         entropicDiff['stringsFound'] = stringsFound
                         output["entropicDiffs"].append(entropicDiff)
                         if printJson:
                             print(json.dumps(output, sort_keys=True, indent=4))
                         else:
+                            print(bcolors.OKGREEN + "File: " + str(path) + bcolors.ENDC)
                             print(bcolors.OKGREEN + "Date: " + commit_time + bcolors.ENDC)
                             print(bcolors.OKGREEN + "Branch: " + branch_name + bcolors.ENDC)
                             print(bcolors.OKGREEN + "Commit: " + prev_commit.message + bcolors.ENDC)