Commit Graph

20 Commits (3a4b69096f68cf73ed8fc45cbd4b8be429871170)

Author SHA1 Message Date
Matt Clay e45c763b64 Fix invalid string escape sequences. 7 years ago
Adrian Likins 9c58827410
Better handling of malformed vault data envelope (#32515)
* Better handling of malformed vault data envelope

If an embedded vaulted variable ('!vault' in yaml)
had an invalid format, it would eventually cause
an error for seemingly unrelated reasons.
"Invalid" meaning not valid hexlify (extra chars,
non-hex chars, etc).

For ex, if a host_vars file had invalid vault format
variables, on py2, it would cause an error like:

  'ansible.vars.hostvars.HostVars object' has no
  attribute u'broken.example.com'

Depending on where the invalid vault is, it could
also cause "VARIABLE IS NOT DEFINED!". The behavior
can also change if ansible-playbook is py2 or py3.

Root cause is errors from binascii.unhexlify() not
being handled consistently.

Fix is to add a AnsibleVaultFormatError exception and
raise it on any unhexlify() errors and to handle it
properly elsewhere.

Add a _unhexlify() that try/excepts around a binascii.unhexlify()
and raises an AnsibleVaultFormatError on invalid vault data.
This is so the same exception type is always raised for this
case. Previous it was different between py2 and py3.

binascii.unhexlify() raises a binascii.Error if the hexlified
blobs in a vault data blob are invalid.

On py2, binascii.Error is a subclass of Exception.
On py3, binascii.Error is a subclass of TypeError

When decrypting content of vault encrypted variables,
if a binascii.Error is raised it propagates up to
playbook.base.Base.post_validate(). post_validate()
handles exceptions for TypeErrors but not for
base Exception subclasses (like py2 binascii.Error).

* Add a display.warning on vault format errors
* Unit tests for _unhexlify, parse_vaulttext*
* Add intg test cases for invalid vault formats

Fixes #28038
7 years ago
Adrian Likins 297dfb1d50 Vault secrets script client inc new 'keyring' client (#27669)
This adds a new type of vault-password script  (a 'client') that takes advantage of and enhances the 
multiple vault password support.

If a vault password script basename ends with the name '-client', consider it a vault password script client. 

A vault password script 'client' just means that the script will take a '--vault-id' command line arg.

The previous vault password script (as invoked by --vault-password-file pointing to an executable) takes
no args and returns the password on stdout. But it doesnt know anything about --vault-id or multiple vault
passwords.

The new 'protocol' of the vault password script takes a cli arg ('--vault-id') so that it can lookup that specific
vault-id and return it's password.

Since existing vault password scripts don't know the new 'protocol', a way to distinguish password scripts
that do understand the protocol was needed.  The convention now is to consider password scripts that are
named like 'something-client.py' (and executable) to be vault password client scripts.

The new client scripts get invoked with the '--vault-id' they were requested for. An example:

     ansible-playbook --vault-id my_vault_id@contrib/vault/vault-keyring-client.py some_playbook.yml

That will cause the 'contrib/vault/vault-keyring-client.py' script to be invoked as:

     contrib/vault/vault-keyring-client.py --vault-id my_vault_id

The previous vault-keyring.py password script was extended to become vault-keyring-client.py. It uses
the python 'keyring' module to request secrets from various backends. The plain 'vault-keyring.py' script
would determine which key id and keyring name to use based on values that had to be set in ansible.cfg.
So it was also limited to one keyring name.

The new vault-keyring-client.py will request the secret for the vault id provided via the '--vault-id' option.
The script can be used without config and can be used for multiple keyring ids (and keyrings).

On success, a vault password client script will print the password to stdout and exit with a return code of 0.
If the 'client' script can't find a secret for the --vault-id, the script will exit with return code of 2 and print an error to stderr.
7 years ago
Adrian Likins e287af1ac8 Vault secrets empty password (#28186)
* Better handling of empty/invalid passwords

empty password files are global error and cause an
exit. A warning is also emitted with more detail.

ie, if any of the password/secret sources provide
a bogus password (ie, empty) or fail (exception,
 ctrl-d, EOFError), we stop at the first error and exit. 

This makes behavior when entering empty password at
prompt match 2.3 (ie, an error)
7 years ago
Adrian Likins 220db9cdd2 Better vault pass prompt behav on EOF, more unit tests (#27981) 7 years ago
Adrian Likins 2b0a7338d4 Handle win style CRLF newlines in vault text (#27590)
When parsing a vaulttext blob, use .splitlines()
instead of split(b'\n') to handle \n newlines and
windows style \r\n (CRLF) new lines.

The vaulttext enevelope at this point is just the header line
and a hexlify()'ed blob, so CRLF is a valid newline here.

Fixes #22914
7 years ago
Adrian Likins 934b645191 Support multiple vault passwords (#22756)
Fixes #13243

** Add --vault-id to name/identify multiple vault passwords

Use --vault-id to indicate id and path/type

 --vault-id=prompt  # prompt for default vault id password
 --vault-id=myorg@prompt  # prompt for a vault_id named 'myorg'
 --vault-id=a_password_file  # load ./a_password_file for default id
 --vault-id=myorg@a_password_file # load file for 'myorg' vault id

vault_id's are created implicitly for existing --vault-password-file
and --ask-vault-pass options.

Vault ids are just for UX purposes and bookkeeping. Only the vault
payload and the password bytestring is needed to decrypt a
vault blob.

Replace passing password around everywhere with
a VaultSecrets object.

If we specify a vault_id, mention that in password prompts

Specifying multiple -vault-password-files will
now try each until one works

** Rev vault format in a backwards compatible way

The 1.2 vault format adds the vault_id to the header line
of the vault text. This is backwards compatible with older
versions of ansible. Old versions will just ignore it and
treat it as the default (and only) vault id.

Note: only 2.4+ supports multiple vault passwords, so while
earlier ansible versions can read the vault-1.2 format, it
does not make them magically support multiple vault passwords.

use 1.1 format for 'default' vault_id

Vaulted items that need to include a vault_id will be
written in 1.2 format.

If we set a new DEFAULT_VAULT_IDENTITY, then the default will
use version 1.2

vault will only use a vault_id if one is specified. So if none
is specified and C.DEFAULT_VAULT_IDENTITY is 'default'
we use the old format.

** Changes/refactors needed to implement multiple vault passwords

raise exceptions on decrypt fail, check vault id early

split out parsing the vault plaintext envelope (with the
sha/original plaintext) to _split_plaintext_envelope()

some cli fixups for specifying multiple paths in
the unfrack_paths optparse callback

fix py3 dict.keys() 'dict_keys object is not indexable' error

pluralize cli.options.vault_password_file -> vault_password_files
pluralize cli.options.new_vault_password_file -> new_vault_password_files
pluralize cli.options.vault_id -> cli.options.vault_ids

** Add a config option (vault_id_match) to force vault id matching.

With 'vault_id_match=True' and an ansible
vault that provides a vault_id, then decryption will require
that a matching vault_id is required. (via
--vault-id=my_vault_id@password_file, for ex).

In other words, if the config option is true, then only
the vault secrets with matching vault ids are candidates for
decrypting a vault. If option is false (the default), then
all of the provided vault secrets will be selected.

If a user doesn't want all vault secrets to be tried to
decrypt any vault content, they can enable this option.

Note: The vault id used for the match is not encrypted or
cryptographically signed. It is just a label/id/nickname used
for referencing a specific vault secret.
7 years ago
Toshio Kuratomi e238ae999b Cyptography pr 20566 rebase (#25560)
Make pyca/cryptography the preferred backend for cryptographic needs (mainly vault) falling back to pycrypto

pyca/cryptography is already implicitly a dependency in many cases
through paramiko (2.0+) as well as the new openssl_publickey module,
which requires pyOpenSSL 16.0+. Additionally, pyca/cryptography is
an optional dep for better performance with vault already.

This commit leverages cryptography's padding, constant time comparisons,
and CBC/CTR modes to reduce the amount of code ansible needs to
maintain.

* Handle wrong password given for VaultAES format

* Do not display deprecation warning for cryptography on python-2.6

* Namespace all of the pycrypto imports and always import them

  Makes unittests better and the code less likely to get stupid mistakes
  (like using HMAC from cryptogrpahy when the one from pycrypto is needed)

* Add back in atfork since we need pycrypto to reinitialize its RNG just in case we're being used with old paramiko

* contrib/inventory/gce: Remove spurious require on pycrypto

(cherry picked from commit 9e16b9db275263b3ea8d1b124966fdebfc9ab271)

* Add cryptography to ec2_win_password module requirements
  * Fix python3 bug which would pass text strings to a function which
    requires byte strings.

* Attempt to add pycrypto version to setup deps

* Change hacking README for dual pycrypto/cryptography

* update dependencies for various CI scripts

* additional CI dockerfile/script updates

* add paramiko to the windows and sanity requirement set

  This is needed because ansible lists it as a requirement. Previously
  the missing dep wasn't enforced, but cryptography imports pkg_resources
  so you can't ignore a requirement any more

* Add integration test cases for old vault and for wrong passwords

* helper script for manual testing of pycrypto/cryptography

* Skip the pycrypto tests so that users without it installed can still run the unittests

* Run unittests for vault with both cryptography and pycrypto backend
8 years ago
Dag Wieers 4efec414e7 test/: PEP8 compliancy (#24803)
* test/: PEP8 compliancy

- Make PEP8 compliant

* Python3 chokes on casting int to bytes (#24952)

But if we tell the formatter that the var is a number, it works
8 years ago
Toshio Kuratomi 2fff690caa Update module_utils.six to latest (#22855)
* Update module_utils.six to latest

We've been held back on the version of six we could use on the module
side to 1.4.x because of python-2.4 compatibility.  Now that our minimum
is Python-2.6, we can update to the latest version of six in
module_utils and get rid of the second copy in lib/ansible/compat.
8 years ago
Toshio Kuratomi e70066a6f7 Many Cleanups to vault
* Make is_encrypted_file handle both files opened in text and binary mode
  On python3, by default files are opened in text mode.  Since we know
  the encoding of vault files (and especially the header which is the
  first set of bytes) we can decide whether the file is an encrypted
  vault file in either case.
* Fix is_encrypted_file not resetting the file position
* Update is_encrypted_file to check that all the data in the file is ascii
* For is_encrypted_file(), add start_pos and count parameters
  This allows callers to specify reading vaulttext from the middle of
  a file if necessary.
* Combine VaultLib.encrypt() and VaultLib.encrypt_bytestring()
* Change vault's is_encrypted() to take either text or byte strings and to return False if any part of the data is non-ascii.
* Remove unnecessary use of six.b
* Vault Cipher: mark a few methods as private.
* VaultAES256._is_equal throws a TypeError if given non byte strings
* Make VaultAES256 methods that don't need self staticmethods and classmethods
* Mark VaultAES and is_encrypted as deprecated
* Get rid of VaultFile (unused and feature implemented in a different way)
* Normalize variable and parameter names on plaintext, ciphertext, vaulttext
* Normalize variable and parameter names on "b_" prefix when dealing with bytes
* Test changes:
  * Remove redundant tests( both checking the same byte string)
  * Fix use of format string without format operator
  * Enable vault editor tests on python3
  * Initialize the vault_cipher for VaultAES256 testing in setUp()
  * Make assertTrue and assertFalse take the actual method calls for
    better error messages.
  * Test that non-ascii byte strings compare correctly.
  * Test that unicode strings and ints raise TypeError

* Test-specific:
  * Removed test_methods_exist().  We only have one VaultLib so the
    implementation is the assurance that the methods exist. (Can use an abc for
    this if it changes).
  * Add tests for both byte string and text string input where the API takes either.
  * Convert "assert" to unittest assert functions or add a custom message where
    that will make failures easier to debug.
  * Move instantiating the VaultLib into setUp().
8 years ago
Toshio Kuratomi 4ed88512e4 Move uses of to_bytes, to_text, to_native to use the module_utils version (#17423)
We couldn't copy to_unicode, to_bytes, to_str into module_utils because
of licensing.  So once created it we had two sets of functions that did
the same things but had different implementations.  To remedy that, this
change removes the ansible.utils.unicode versions of those functions.
8 years ago
Adrian Likins e396d5d508 Implement vault encrypted yaml variables. (#16274)
Make !vault-encrypted create a AnsibleVaultUnicode
yaml object that can be used as a regular string object.

This allows a playbook to include a encrypted vault
blob for the value of a yaml variable. A 'secret_password'
variable can have it's value encrypted instead of having
to vault encrypt an entire vars file.

Add __ENCRYPTED__ to the vault yaml types so
template.Template can treat it similar
to __UNSAFE__ flags.

vault.VaultLib api changes:
    - Split VaultLib.encrypt to encrypt and encrypt_bytestring

    - VaultLib.encrypt() previously accepted the plaintext data
      as either a byte string or a unicode string.
      Doing the right thing based on the input type would fail
      on py3 if given a arg of type 'bytes'. To simplify the
      API, vaultlib.encrypt() now assumes input plaintext is a
      py2 unicode or py3 str. It will encode to utf-8 then call
      the new encrypt_bytestring(). The new methods are less
      ambiguous.

    - moved VaultLib.is_encrypted logic to vault module scope
      and split to is_encrypted() and is_encrypted_file().

Add a test/unit/mock/yaml_helper.py
It has some helpers for testing parsing/yaml

Integration tests added as roles test_vault and test_vault_embedded
8 years ago
Marius Gedminas ec3ada1cda Fix test on Python 3: vault code expects bytes
(All tests now succeed on Python 3.5)
9 years ago
Marius Gedminas 5c70f932bd Fix test on Python 3: vault code expects bytes
(Third failing test out of four.)
9 years ago
Marius Gedminas a1d95536f9 Fix test on Python 3: vault code expects bytes
(Different test than the last commit.)
9 years ago
Marius Gedminas f58f0c62e1 Fix test on Python 3: vault code expects bytes 9 years ago
Abhijit Menon-Sen 4f3a98eff6 Update Vault tests to make sure AES decryption works
Note that this test was broken in devel because it was really just
duplicating the AES256 test because setting v.cipher_name to 'AES'
no longer selected AES after it was de-write-whitelisted.

Now that we've removed the VaultAES encryption code, we embed static
output from an earlier version and test that we can decrypt it.
9 years ago
Toshio Kuratomi a3fd4817ef Unicode and other fixes for vault 9 years ago
James Cammarata ce3ef7f4c1 Making the switch to v2 10 years ago