1 files changed, 89 insertions, 0 deletions
diff --git a/lib/ansible/utils/hashing.py b/lib/ansible/utils/hashing.py
new file mode 100644
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--- /dev/null
+++ b/lib/ansible/utils/hashing.py
@@ -0,0 +1,89 @@
+# (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com>
+#
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+
+# Make coding more python3-ish
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import os
+
+from hashlib import sha1
+
+try:
+    from hashlib import md5 as _md5
+except ImportError:
+    # Assume we're running in FIPS mode here
+    _md5 = None
+
+from ansible.errors import AnsibleError
+from ansible.module_utils._text import to_bytes
+
+
+def secure_hash_s(data, hash_func=sha1):
+    ''' Return a secure hash hex digest of data. '''
+
+    digest = hash_func()
+    data = to_bytes(data, errors='surrogate_or_strict')
+    digest.update(data)
+    return digest.hexdigest()
+
+
+def secure_hash(filename, hash_func=sha1):
+    ''' Return a secure hash hex digest of local file, None if file is not present or a directory. '''
+
+    if not os.path.exists(to_bytes(filename, errors='surrogate_or_strict')) or os.path.isdir(to_bytes(filename, errors='strict')):
+        return None
+    digest = hash_func()
+    blocksize = 64 * 1024
+    try:
+        infile = open(to_bytes(filename, errors='surrogate_or_strict'), 'rb')
+        block = infile.read(blocksize)
+        while block:
+            digest.update(block)
+            block = infile.read(blocksize)
+        infile.close()
+    except IOError as e:
+        raise AnsibleError("error while accessing the file %s, error was: %s" % (filename, e))
+    return digest.hexdigest()
+
+
+# The checksum algorithm must match with the algorithm in ShellModule.checksum() method
+checksum = secure_hash
+checksum_s = secure_hash_s
+
+
+#
+# Backwards compat functions.  Some modules include md5s in their return values
+# Continue to support that for now.  As of ansible-1.8, all of those modules
+# should also return "checksum" (sha1 for now)
+# Do not use md5 unless it is needed for:
+# 1) Optional backwards compatibility
+# 2) Compliance with a third party protocol
+#
+# MD5 will not work on systems which are FIPS-140-2 compliant.
+#
+
+def md5s(data):
+    if not _md5:
+        raise ValueError('MD5 not available.  Possibly running in FIPS mode')
+    return secure_hash_s(data, _md5)
+
+
+def md5(filename):
+    if not _md5:
+        raise ValueError('MD5 not available.  Possibly running in FIPS mode')
+    return secure_hash(filename, _md5)