diff --git a/changelogs/fragments/hashing-changes.yaml b/changelogs/fragments/hashing-changes.yaml
new file mode 100644
index 00000000000..87ebd41cc66
--- /dev/null
+++ b/changelogs/fragments/hashing-changes.yaml
@@ -0,0 +1,18 @@
+---
+bugfixes:
+- vars_prompt with encrypt does not require passlib for the algorithms
+  supported by crypt.
+- Additional checks ensure that there is always a result of hashing passwords
+  in the password_hash filter and vars_prompt, otherwise an error is returned.
+  Some modules (like user module) interprets None as no password at all,
+  which can be dangerous if the password given above is passed directly into
+  those modules.
+- Avoids deprecated functionality of passlib with newer library versions.
+- password_hash does not hard-code the salt-length, which fixes bcrypt
+  in connection with passlib as bcrypt requires a salt with length 22.
+minor_changes:
+- The password_hash filter supports all parameters of passlib.
+  This allows users to provide a rounds parameter.
+  (https://github.com/ansible/ansible/issues/15326)
+- password_hash is not restricted to the subset provided by crypt.crypt
+  (https://github.com/ansible/ansible/issues/17266)
diff --git a/docs/docsite/rst/porting_guides/porting_guide_2.7.rst b/docs/docsite/rst/porting_guides/porting_guide_2.7.rst
index 21a78dab9c4..a6001f322c5 100644
--- a/docs/docsite/rst/porting_guides/porting_guide_2.7.rst
+++ b/docs/docsite/rst/porting_guides/porting_guide_2.7.rst
@@ -71,6 +71,16 @@ In Ansible 2.7 a new module argument named ``public`` was added to the ``include
 
 There is an important difference in the way that ``include_role`` (dynamic) will expose the role's variables, as opposed to ``import_role`` (static). ``import_role`` is a pre-processor, and the ``defaults`` and ``vars`` are evaluated at playbook parsing, making the variables available to tasks and roles listed at any point in the play. ``include_role`` is a conditional task, and the ``defaults`` and ``vars`` are evaluated at execution time, making the variables available to tasks and roles listed *after* the ``include_role`` task.
 
+vars_prompt with unknown algorithms
+-----------------------------------
+
+vars_prompt now throws an error if the hash algorithm specified in encrypt is not supported by
+the controller.  This increases the safety of vars_prompt as it previously returned None if the
+algorithm was unknown.  Some modules, notably the user module, treated a password of None as
+a request not to set a password.  If your playbook starts erroring because of this, change the
+hashing algorithm being used with this filter.
+
+
 Deprecated
 ==========
 
@@ -81,7 +91,7 @@ Expedited Deprecation: Use of ``__file__`` in ``AnsibleModule``
 
 We are deprecating the use of the ``__file__`` variable to refer to the file containing the currently-running code. This common Python technique for finding a filesystem path does not always work (even in vanilla Python). Sometimes a Python module can be imported from a virtual location (like inside of a zip file). When this happens, the ``__file__`` variable will reference a virtual location pointing to inside of the zip file. This can cause problems if, for instance, the code was trying to use ``__file__`` to find the directory containing the python module to write some temporary information.
 
-Before the introduction of AnsiBallZ in Ansible 2.1, using ``__file__`` worked in ``AnsibleModule`` sometimes, but any module that used it would fail when pipelining was turned on (because the module would be piped into the python interpreter's standard input, so ``__file__`` wouldn't contain a file path). AnsiBallZ unintentionally made using ``__file__`` always work, by always creating a temporary file for ``AnsibleModule`` to reside in.
+Before the introduction of AnsiBallZ in Ansible 2.1, using ``__file__`` worked in ``AnsibleModule`` sometimes, but any module that used it would fail when pipelining was turned on (because the module would be piped into the python interpreter's standard input, so ``__file__`` wouldn't contain a file path). AnsiBallZ unintentionally made using ``__file__`` work, by always creating a temporary file for ``AnsibleModule`` to reside in.
 
 Ansible 2.8 will no longer create a temporary file for ``AnsibleModule``; instead it will read the file out of a zip file. This change should speed up module execution, but it does mean that starting with Ansible 2.8, referencing ``__file__`` will always fail in ``AnsibleModule``.
 
@@ -190,7 +200,12 @@ Noteworthy module changes
 Plugins
 =======
 
-No notable changes.
+* The hash_password filter now throws an error if the hash algorithm specified is not supported by
+  the controller.  This increases the safety of the filter as it previously returned None if the
+  algorithm was unknown.  Some modules, notably the user module, treated a password of None as
+  a request not to set a password.  If your playbook starts erroring because of this, change the
+  hashing algorithm being used with this filter.
+
 
 Porting custom scripts
 ======================
diff --git a/docs/docsite/rst/user_guide/playbooks_filters.rst b/docs/docsite/rst/user_guide/playbooks_filters.rst
index 3916cf82b9a..d8cbebcc422 100644
--- a/docs/docsite/rst/user_guide/playbooks_filters.rst
+++ b/docs/docsite/rst/user_guide/playbooks_filters.rst
@@ -783,6 +783,18 @@ An idempotent method to generate unique hashes per system is to use a salt that
 Hash types available depend on the master system running ansible,
 'hash' depends on hashlib password_hash depends on passlib (https://passlib.readthedocs.io/en/stable/lib/passlib.hash.html).
 
+.. versionadded:: 2.7
+
+Some hash types allow providing a rounds parameter::
+
+    {{ 'secretpassword'|password_hash('sha256', 'mysecretsalt', rounds=10000) }}
+
+When`Passlib <https://passlib.readthedocs.io/en/stable/>`_ is installed
+`password_hash` supports any crypt scheme and parameter supported by 'Passlib'::
+
+    {{ 'secretpassword'|password_hash('sha256_crypt', 'mysecretsalt', rounds=5000) }}
+    {{ 'secretpassword'|password_hash('bcrypt', ident='2b', rounds=14) }}
+
 .. _combine_filter:
 
 Combining hashes/dictionaries
diff --git a/docs/docsite/rst/user_guide/playbooks_prompts.rst b/docs/docsite/rst/user_guide/playbooks_prompts.rst
index 34300591593..6ae1655fe7b 100644
--- a/docs/docsite/rst/user_guide/playbooks_prompts.rst
+++ b/docs/docsite/rst/user_guide/playbooks_prompts.rst
@@ -90,6 +90,16 @@ However, the only parameters accepted are 'salt' or 'salt_size'. You can use you
 'salt', or have one generated automatically using 'salt_size'. If nothing is specified, a salt
 of size 8 will be generated.
 
+.. versionadded:: 2.7
+
+When Passlib is not installed the `crypt <https://docs.python.org/2/library/crypt.html>`_ library is used as fallback.
+Depending on your platform at most the following crypt schemes are supported:
+
+- *bcrypt* - BCrypt
+- *md5_crypt* - MD5 Crypt
+- *sha256_crypt* - SHA-256 Crypt
+- *sha512_crypt* - SHA-512 Crypt
+
 .. seealso::
 
    :doc:`playbooks`
diff --git a/lib/ansible/plugins/filter/core.py b/lib/ansible/plugins/filter/core.py
index b56c5d527b9..17309dd8aa5 100644
--- a/lib/ansible/plugins/filter/core.py
+++ b/lib/ansible/plugins/filter/core.py
@@ -41,19 +41,14 @@ from random import Random, SystemRandom, shuffle, random
 
 from jinja2.filters import environmentfilter, do_groupby as _do_groupby
 
-try:
-    import passlib.hash
-    HAS_PASSLIB = True
-except ImportError:
-    HAS_PASSLIB = False
-
-from ansible.errors import AnsibleFilterError
-from ansible.module_utils.six import iteritems, string_types, integer_types
+from ansible.errors import AnsibleError, AnsibleFilterError
+from ansible.module_utils.six import iteritems, string_types, integer_types, reraise
 from ansible.module_utils.six.moves import reduce, shlex_quote
 from ansible.module_utils._text import to_bytes, to_text
 from ansible.module_utils.common.collections import is_sequence
 from ansible.parsing.ajson import AnsibleJSONEncoder
 from ansible.parsing.yaml.dumper import AnsibleDumper
+from ansible.utils.encrypt import passlib_or_crypt
 from ansible.utils.hashing import md5s, checksum_s
 from ansible.utils.unicode import unicode_wrap
 from ansible.utils.vars import merge_hash
@@ -252,42 +247,19 @@ def get_hash(data, hashtype='sha1'):
     return h.hexdigest()
 
 
-def get_encrypted_password(password, hashtype='sha512', salt=None):
-
-    # TODO: find a way to construct dynamically from system
-    cryptmethod = {
-        'md5': '1',
-        'blowfish': '2a',
-        'sha256': '5',
-        'sha512': '6',
+def get_encrypted_password(password, hashtype='sha512', salt=None, salt_size=None, rounds=None):
+    passlib_mapping = {
+        'md5': 'md5_crypt',
+        'blowfish': 'bcrypt',
+        'sha256': 'sha256_crypt',
+        'sha512': 'sha512_crypt',
     }
 
-    if hashtype in cryptmethod:
-        if salt is None:
-            r = SystemRandom()
-            if hashtype in ['md5']:
-                saltsize = 8
-            else:
-                saltsize = 16
-            saltcharset = string.ascii_letters + string.digits + '/.'
-            salt = ''.join([r.choice(saltcharset) for _ in range(saltsize)])
-
-        if not HAS_PASSLIB:
-            if sys.platform.startswith('darwin'):
-                raise AnsibleFilterError('|password_hash requires the passlib python module to generate password hashes on macOS/Darwin')
-            saltstring = "$%s$%s" % (cryptmethod[hashtype], salt)
-            encrypted = crypt.crypt(password, saltstring)
-        else:
-            if hashtype == 'blowfish':
-                cls = passlib.hash.bcrypt
-            else:
-                cls = getattr(passlib.hash, '%s_crypt' % hashtype)
-
-            encrypted = cls.encrypt(password, salt=salt)
-
-        return encrypted
-
-    return None
+    hashtype = passlib_mapping.get(hashtype, hashtype)
+    try:
+        return passlib_or_crypt(password, hashtype, salt=salt, salt_size=salt_size, rounds=rounds)
+    except AnsibleError as e:
+        reraise(AnsibleFilterError, AnsibleFilterError(str(e), orig_exc=e), sys.exc_info()[2])
 
 
 def to_uuid(string):
diff --git a/lib/ansible/plugins/lookup/password.py b/lib/ansible/plugins/lookup/password.py
index 2d41ba92629..3895e2ebd0c 100644
--- a/lib/ansible/plugins/lookup/password.py
+++ b/lib/ansible/plugins/lookup/password.py
@@ -100,7 +100,7 @@ from ansible.errors import AnsibleError, AnsibleAssertionError
 from ansible.module_utils._text import to_bytes, to_native, to_text
 from ansible.parsing.splitter import parse_kv
 from ansible.plugins.lookup import LookupBase
-from ansible.utils.encrypt import do_encrypt, random_password
+from ansible.utils.encrypt import do_encrypt, random_password, random_salt
 from ansible.utils.path import makedirs_safe
 
 
@@ -207,15 +207,6 @@ def _gen_candidate_chars(characters):
     return chars
 
 
-def _random_salt():
-    """Return a text string suitable for use as a salt for the hash functions we use to encrypt passwords.
-    """
-    # Note passlib salt values must be pure ascii so we can't let the user
-    # configure this
-    salt_chars = _gen_candidate_chars(['ascii_letters', 'digits', './'])
-    return random_password(length=8, chars=salt_chars)
-
-
 def _parse_content(content):
     '''parse our password data format into password and salt
 
@@ -329,7 +320,7 @@ class LookupModule(LookupBase):
 
             if params['encrypt'] and not salt:
                 changed = True
-                salt = _random_salt()
+                salt = random_salt()
 
             if changed and b_path != to_bytes('/dev/null'):
                 content = _format_content(plaintext_password, salt, encrypt=params['encrypt'])
diff --git a/lib/ansible/utils/encrypt.py b/lib/ansible/utils/encrypt.py
index 5e34beddbda..4445fb87c81 100644
--- a/lib/ansible/utils/encrypt.py
+++ b/lib/ansible/utils/encrypt.py
@@ -4,18 +4,25 @@
 from __future__ import (absolute_import, division, print_function)
 __metaclass__ = type
 
+import crypt
 import multiprocessing
 import random
+import string
+import sys
+
+from collections import namedtuple
 
 from ansible import constants as C
 from ansible.errors import AnsibleError, AnsibleAssertionError
 from ansible.module_utils.six import text_type
 from ansible.module_utils._text import to_text, to_bytes
 
-
 PASSLIB_AVAILABLE = False
 try:
+    import passlib
     import passlib.hash
+    from passlib.utils.handlers import HasRawSalt
+
     PASSLIB_AVAILABLE = True
 except:
     pass
@@ -33,33 +40,6 @@ _LOCK = multiprocessing.Lock()
 DEFAULT_PASSWORD_LENGTH = 20
 
 
-def do_encrypt(result, encrypt, salt_size=None, salt=None):
-    if PASSLIB_AVAILABLE:
-        try:
-            crypt = getattr(passlib.hash, encrypt)
-        except:
-            raise AnsibleError("passlib does not support '%s' algorithm" % encrypt)
-
-        if salt_size:
-            result = crypt.encrypt(result, salt_size=salt_size)
-        elif salt:
-            if crypt._salt_is_bytes:
-                salt = to_bytes(salt, encoding='ascii', errors='strict')
-            else:
-                salt = to_text(salt, encoding='ascii', errors='strict')
-            result = crypt.encrypt(result, salt=salt)
-        else:
-            result = crypt.encrypt(result)
-    else:
-        raise AnsibleError("passlib must be installed to encrypt vars_prompt values")
-
-    # Hashes from passlib.hash should be represented as ascii strings of hex
-    # digits so this should not traceback.  If it's not representable as such
-    # we need to traceback and then blacklist such algorithms because it may
-    # impact calling code.
-    return to_text(result, errors='strict')
-
-
 def random_password(length=DEFAULT_PASSWORD_LENGTH, chars=C.DEFAULT_PASSWORD_CHARS):
     '''Return a random password string of length containing only chars
 
@@ -72,3 +52,149 @@ def random_password(length=DEFAULT_PASSWORD_LENGTH, chars=C.DEFAULT_PASSWORD_CHA
 
     random_generator = random.SystemRandom()
     return u''.join(random_generator.choice(chars) for dummy in range(length))
+
+
+def random_salt(length=8):
+    """Return a text string suitable for use as a salt for the hash functions we use to encrypt passwords.
+    """
+    # Note passlib salt values must be pure ascii so we can't let the user
+    # configure this
+    salt_chars = string.ascii_letters + string.digits + u'./'
+    return random_password(length=length, chars=salt_chars)
+
+
+class BaseHash(object):
+    algo = namedtuple('algo', ['crypt_id', 'salt_size', 'implicit_rounds'])
+    algorithms = {
+        'md5_crypt': algo(crypt_id='1', salt_size=8, implicit_rounds=None),
+        'bcrypt': algo(crypt_id='2a', salt_size=22, implicit_rounds=None),
+        'sha256_crypt': algo(crypt_id='5', salt_size=16, implicit_rounds=5000),
+        'sha512_crypt': algo(crypt_id='6', salt_size=16, implicit_rounds=5000),
+    }
+
+    def __init__(self, algorithm):
+        self.algorithm = algorithm
+
+
+class CryptHash(BaseHash):
+    def __init__(self, algorithm):
+        super(CryptHash, self).__init__(algorithm)
+
+        if sys.platform.startswith('darwin'):
+            raise AnsibleError("crypt.crypt not supported on Mac OS X/Darwin, install passlib python module")
+
+        if algorithm not in self.algorithms:
+            raise AnsibleError("crypt.crypt does not support '%s' algorithm" % self.algorithm)
+        self.algo_data = self.algorithms[algorithm]
+
+    def hash(self, secret, salt=None, salt_size=None, rounds=None):
+        salt = self._salt(salt, salt_size)
+        rounds = self._rounds(rounds)
+        return self._hash(secret, salt, rounds)
+
+    def _salt(self, salt, salt_size):
+        salt_size = salt_size or self.algo_data.salt_size
+        return salt or random_salt(salt_size)
+
+    def _rounds(self, rounds):
+        if rounds == self.algo_data.implicit_rounds:
+            # Passlib does not include the rounds if it is the same as implict_rounds.
+            # Make crypt lib behave the same, by not explicitly specifying the rounds in that case.
+            return None
+        else:
+            return rounds
+
+    def _hash(self, secret, salt, rounds):
+        if rounds is None:
+            saltstring = "$%s$%s" % (self.algo_data.crypt_id, salt)
+        else:
+            saltstring = "$%s$rounds=%d$%s" % (self.algo_data.crypt_id, rounds, salt)
+        result = crypt.crypt(secret, saltstring)
+
+        # crypt.crypt returns None if it cannot parse saltstring
+        # None as result would be interpreted by the some modules (user module)
+        # as no password at all.
+        if not result:
+            raise AnsibleError("crypt.crypt does not support '%s' algorithm" % self.algorithm)
+
+        return result
+
+
+class PasslibHash(BaseHash):
+    def __init__(self, algorithm):
+        super(PasslibHash, self).__init__(algorithm)
+
+        if not PASSLIB_AVAILABLE:
+            raise AnsibleError("passlib must be installed to hash with '%s'" % algorithm)
+
+        try:
+            self.crypt_algo = getattr(passlib.hash, algorithm)
+        except:
+            raise AnsibleError("passlib does not support '%s' algorithm" % algorithm)
+
+    def hash(self, secret, salt=None, salt_size=None, rounds=None):
+        salt = self._clean_salt(salt)
+        rounds = self._clean_rounds(rounds)
+        return self._hash(secret, salt=salt, salt_size=salt_size, rounds=rounds)
+
+    def _clean_salt(self, salt):
+        if not salt:
+            return None
+        elif issubclass(self.crypt_algo, HasRawSalt):
+            return to_bytes(salt, encoding='ascii', errors='strict')
+        else:
+            return to_text(salt, encoding='ascii', errors='strict')
+
+    def _clean_rounds(self, rounds):
+        algo_data = self.algorithms.get(self.algorithm)
+        if rounds:
+            return rounds
+        elif algo_data and algo_data.implicit_rounds:
+            # The default rounds used by passlib depend on the passlib version.
+            # For consistency ensure that passlib behaves the same as crypt in case no rounds were specified.
+            # Thus use the crypt defaults.
+            return algo_data.implicit_rounds
+        else:
+            return None
+
+    def _hash(self, secret, salt, salt_size, rounds):
+        # Not every hash algorithm supports every paramter.
+        # Thus create the settings dict only with set parameters.
+        settings = {}
+        if salt:
+            settings['salt'] = salt
+        if salt_size:
+            settings['salt_size'] = salt_size
+        if rounds:
+            settings['rounds'] = rounds
+
+        # starting with passlib 1.7 'using' and 'hash' should be used instead of 'encrypt'
+        if hasattr(self.crypt_algo, 'hash'):
+            result = self.crypt_algo.using(**settings).hash(secret)
+        elif hasattr(self.crypt_algo, 'encrypt'):
+            result = self.crypt_algo.encrypt(secret, **settings)
+        else:
+            raise AnsibleError("installed passlib version %s not supported" % passlib.__version__)
+
+        # passlib.hash should always return something or raise an exception.
+        # Still ensure that there is always a result.
+        # Otherwise an empty password might be assumed by some modules, like the user module.
+        if not result:
+            raise AnsibleError("failed to hash with algorithm '%s'" % self.algorithm)
+
+        # Hashes from passlib.hash should be represented as ascii strings of hex
+        # digits so this should not traceback.  If it's not representable as such
+        # we need to traceback and then blacklist such algorithms because it may
+        # impact calling code.
+        return to_text(result, errors='strict')
+
+
+def passlib_or_crypt(secret, algorithm, salt=None, salt_size=None, rounds=None):
+    if PASSLIB_AVAILABLE:
+        return PasslibHash(algorithm).hash(secret, salt=salt, salt_size=salt_size, rounds=rounds)
+    else:
+        return CryptHash(algorithm).hash(secret, salt=salt, salt_size=salt_size, rounds=rounds)
+
+
+def do_encrypt(result, encrypt, salt_size=None, salt=None):
+    return passlib_or_crypt(result, encrypt, salt_size=salt_size, salt=salt)
diff --git a/test/integration/targets/vars_prompt/test-vars_prompt.py b/test/integration/targets/vars_prompt/test-vars_prompt.py
index 39f834af4c7..45b9f017ff4 100644
--- a/test/integration/targets/vars_prompt/test-vars_prompt.py
+++ b/test/integration/targets/vars_prompt/test-vars_prompt.py
@@ -94,7 +94,7 @@ tests = [
      'test_spec': [
          [('password', 'Scenic-Improving-Payphone\r'),
           ('confirm password', 'Scenic-Improving-Payphone\r')],
-         r'"password": "\$6\$rounds=']},
+         r'"password": "\$6\$']},
 
     # Test variables in prompt field
     # https://github.com/ansible/ansible/issues/32723
diff --git a/test/units/plugins/lookup/test_password.py b/test/units/plugins/lookup/test_password.py
index 9dcd783ee2e..8f3e31750da 100644
--- a/test/units/plugins/lookup/test_password.py
+++ b/test/units/plugins/lookup/test_password.py
@@ -292,15 +292,6 @@ class TestRandomPassword(unittest.TestCase):
                               (char, candidate_chars, params['chars']))
 
 
-class TestRandomSalt(unittest.TestCase):
-    def test(self):
-        res = password._random_salt()
-        expected_salt_candidate_chars = u'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./'
-        self.assertEquals(len(res), 8)
-        for res_char in res:
-            self.assertIn(res_char, expected_salt_candidate_chars)
-
-
 class TestParseContent(unittest.TestCase):
     def test_empty_password_file(self):
         plaintext_password, salt = password._parse_content(u'')
diff --git a/test/units/utils/test_encrypt.py b/test/units/utils/test_encrypt.py
new file mode 100644
index 00000000000..22dd76287f0
--- /dev/null
+++ b/test/units/utils/test_encrypt.py
@@ -0,0 +1,133 @@
+# (c) 2018, Matthias Fuchs <matthias.s.fuchs@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/>.
+
+import pytest
+import sys
+
+from ansible.errors import AnsibleError, AnsibleFilterError
+from ansible.plugins.filter.core import get_encrypted_password
+from ansible.utils import encrypt
+
+
+class passlib_off(object):
+    def __init__(self):
+        self.orig = encrypt.PASSLIB_AVAILABLE
+
+    def __enter__(self):
+        encrypt.PASSLIB_AVAILABLE = False
+        return self
+
+    def __exit__(self, exception_type, exception_value, traceback):
+        encrypt.PASSLIB_AVAILABLE = self.orig
+
+
+def assert_hash(expected, secret, algorithm, **settings):
+    assert encrypt.CryptHash(algorithm).hash(secret, **settings) == expected
+
+    if encrypt.PASSLIB_AVAILABLE:
+        assert encrypt.passlib_or_crypt(secret, algorithm, **settings) == expected
+        assert encrypt.PasslibHash(algorithm).hash(secret, **settings) == expected
+    else:
+        with pytest.raises(AnsibleFilterError):
+            encrypt.PasslibHash(algorithm).hash(secret, **settings)
+
+
+def test_encrypt_with_rounds():
+    assert_hash("$5$12345678$uAZsE3BenI2G.nA8DpTl.9Dc8JiqacI53pEqRr5ppT7",
+                secret="123", algorithm="sha256_crypt", salt="12345678", rounds=5000)
+    assert_hash("$5$rounds=10000$12345678$JBinliYMFEcBeAXKZnLjenhgEhTmJBvZn3aR8l70Oy/",
+                secret="123", algorithm="sha256_crypt", salt="12345678", rounds=10000)
+    assert_hash("$6$12345678$LcV9LQiaPekQxZ.OfkMADjFdSO2k9zfbDQrHPVcYjSLqSdjLYpsgqviYvTEP/R41yPmhH3CCeEDqVhW1VHr3L.",
+                secret="123", algorithm="sha512_crypt", salt="12345678", rounds=5000)
+
+
+def test_encrypt_default_rounds():
+    assert_hash("$1$12345678$tRy4cXc3kmcfRZVj4iFXr/",
+                secret="123", algorithm="md5_crypt", salt="12345678")
+    assert_hash("$5$12345678$uAZsE3BenI2G.nA8DpTl.9Dc8JiqacI53pEqRr5ppT7",
+                secret="123", algorithm="sha256_crypt", salt="12345678")
+    assert_hash("$6$12345678$LcV9LQiaPekQxZ.OfkMADjFdSO2k9zfbDQrHPVcYjSLqSdjLYpsgqviYvTEP/R41yPmhH3CCeEDqVhW1VHr3L.",
+                secret="123", algorithm="sha512_crypt", salt="12345678")
+
+    assert encrypt.CryptHash("md5_crypt").hash("123")
+
+
+def test_password_hash_filter_no_passlib():
+    with passlib_off():
+        assert not encrypt.PASSLIB_AVAILABLE
+        assert get_encrypted_password("123", "md5", salt="12345678") == "$1$12345678$tRy4cXc3kmcfRZVj4iFXr/"
+
+        with pytest.raises(AnsibleFilterError):
+            get_encrypted_password("123", "crypt16", salt="12")
+
+
+def test_password_hash_filter_passlib():
+    if not encrypt.PASSLIB_AVAILABLE:
+        pytest.skip("passlib not available")
+
+    with pytest.raises(AnsibleFilterError):
+        get_encrypted_password("123", "sha257", salt="12345678")
+
+    # Uses 5000 rounds by default for sha256 matching crypt behaviour
+    assert get_encrypted_password("123", "sha256", salt="12345678") == "$5$12345678$uAZsE3BenI2G.nA8DpTl.9Dc8JiqacI53pEqRr5ppT7"
+    assert get_encrypted_password("123", "sha256", salt="12345678", rounds=5000) == "$5$12345678$uAZsE3BenI2G.nA8DpTl.9Dc8JiqacI53pEqRr5ppT7"
+
+    assert (get_encrypted_password("123", "sha256", salt="12345678", rounds=10000) ==
+            "$5$rounds=10000$12345678$JBinliYMFEcBeAXKZnLjenhgEhTmJBvZn3aR8l70Oy/")
+
+    assert (get_encrypted_password("123", "sha512", salt="12345678", rounds=6000) ==
+            "$6$rounds=6000$12345678$l/fC67BdJwZrJ7qneKGP1b6PcatfBr0dI7W6JLBrsv8P1wnv/0pu4WJsWq5p6WiXgZ2gt9Aoir3MeORJxg4.Z/")
+
+    assert (get_encrypted_password("123", "sha512", salt="12345678", rounds=5000) ==
+            "$6$12345678$LcV9LQiaPekQxZ.OfkMADjFdSO2k9zfbDQrHPVcYjSLqSdjLYpsgqviYvTEP/R41yPmhH3CCeEDqVhW1VHr3L.")
+
+    assert get_encrypted_password("123", "crypt16", salt="12") == "12pELHK2ME3McUFlHxel6uMM"
+
+    # Try algorithm that uses a raw salt
+    assert get_encrypted_password("123", "pbkdf2_sha256")
+
+
+def test_do_encrypt_no_passlib():
+    with passlib_off():
+        assert not encrypt.PASSLIB_AVAILABLE
+        assert encrypt.do_encrypt("123", "md5_crypt", salt="12345678") == "$1$12345678$tRy4cXc3kmcfRZVj4iFXr/"
+
+        with pytest.raises(AnsibleError):
+            encrypt.do_encrypt("123", "crypt16", salt="12")
+
+
+def test_do_encrypt_passlib():
+    if not encrypt.PASSLIB_AVAILABLE:
+        pytest.skip("passlib not available")
+
+    with pytest.raises(AnsibleError):
+        encrypt.do_encrypt("123", "sha257_crypt", salt="12345678")
+
+    # Uses 5000 rounds by default for sha256 matching crypt behaviour.
+    assert encrypt.do_encrypt("123", "sha256_crypt", salt="12345678") == "$5$12345678$uAZsE3BenI2G.nA8DpTl.9Dc8JiqacI53pEqRr5ppT7"
+
+    assert encrypt.do_encrypt("123", "md5_crypt", salt="12345678") == "$1$12345678$tRy4cXc3kmcfRZVj4iFXr/"
+
+    assert encrypt.do_encrypt("123", "crypt16", salt="12") == "12pELHK2ME3McUFlHxel6uMM"
+
+
+def test_random_salt():
+    res = encrypt.random_salt()
+    expected_salt_candidate_chars = u'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./'
+    assert len(res) == 8
+    for res_char in res:
+        assert res_char in expected_salt_candidate_chars