htpasswd: fix hash_scheme aliases and Apache-compatible bcrypt (#12123)

* fix(htpasswd): support HtpasswdFile aliases and Apache-compatible bcrypt

CryptContext does not recognise HtpasswdFile alias names such as
portable, portable_apache_24, host_apache_24, causing a KeyError.
In addition, building a CryptContext for bcrypt produced $2b$ hashes
that Apache rejects (it only accepts $2y$/$2a$).

Use htpasswd_context for schemes it already supports, fall back to
htpasswd_context on KeyError for aliases, and import CryptContext
from module_utils/_crypt.py instead of passlib directly.

Fixes #6135

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(changelog): add fragment for PR 12123

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix(_crypt): silence DeprecationWarning when importing stdlib crypt

On Python 3.11/3.12, `import crypt` emits a DeprecationWarning that
ansible-test sanity --test import treats as an error. Suppress it since
the import is an intentional fallback when passlib is not available.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix(htpasswd): fix sanity ignores and bcrypt version constraint

- Revert _crypt.py DeprecationWarning suppression; add sanity ignore
  entries for htpasswd.py import-3.11/3.12 instead (mirrors existing
  entries for _crypt.py itself)
- Pin bcrypt<4.2 in integration tests: bcrypt 4.2 removed __about__
  which passlib 1.7.x uses, breaking passlib.apache import
- Fix regex_search assertion to use 'is not none' for a boolean result
- Add bcrypt version constraint note to module documentation

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix(htpasswd): handle system-installed bcrypt in integration tests

On Debian/Ubuntu, bcrypt may be installed by the system package manager
with no RECORD file, making pip downgrade impossible. Move bcrypt
installation into a self-contained block in test_schemes.yml with
ignore_errors, a functional passlib+bcrypt check, and always-cleanup.
Bcrypt tests are skipped when a compatible version cannot be used.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* refactor(htpasswd): extract obtain_crypt_context(); import CryptContext from passlib directly

Extract context selection logic into obtain_crypt_context(). Import
CryptContext inside the deps.declare("passlib") block instead of from
module_utils/_crypt.py — passlib is already a hard dependency and
other symbols are imported from it there. Remove now-unnecessary
htpasswd.py sanity import ignore entries.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

plugins/modules/htpasswd.py

@@ -66,6 +66,8 @@ notes:
   - 'On Debian < 11, Ubuntu <= 20.04, or Fedora: install C(python-passlib).'
   - 'On Debian, Ubuntu: install C(python3-passlib).'
   - 'On RHEL or CentOS: Enable EPEL, then install C(python-passlib).'
+  - To use V(bcrypt) as O(hash_scheme), the C(bcrypt) Python library must also be installed.
+    Due to incompatibilities in C(passlib) 1.7.x, use C(bcrypt<4.2).
 requirements: [passlib>=1.6]
 author: "Ansible Core Team"
 extends_documentation_fragment:
@@ -109,7 +111,7 @@ with deps.declare("passlib"):
     # Apparently the type infos don't know htpasswd_context, which *does* exist
     # (but isn't mentioned in the documentation for some reason)
     from passlib.apache import HtpasswdFile, htpasswd_context  # type: ignore[attr-defined]
-    from passlib.context import CryptContext
+    from passlib.context import CryptContext  # type: ignore[assignment]
 
 
 apache_hashes = ["apr_md5_crypt", "des_crypt", "ldap_sha1", "plaintext"]
@@ -121,14 +123,24 @@ def create_missing_directories(dest):
         os.makedirs(destpath)
 
 
+def obtain_crypt_context(hash_scheme):
+    if hash_scheme in apache_hashes or hash_scheme in htpasswd_context.schemes():
+        # Use htpasswd_context for all officially-supported schemes, including bcrypt
+        # (htpasswd_context produces Apache-compatible $2y$ bcrypt, not $2b$)
+        return htpasswd_context
+    try:
+        return CryptContext(schemes=[hash_scheme] + apache_hashes)
+    except KeyError:
+        # hash_scheme is a HtpasswdFile alias (e.g. portable, portable_apache_24)
+        # that is not a valid passlib scheme name; let HtpasswdFile resolve it natively
+        return htpasswd_context
+
+
 def present(dest, username, password, hash_scheme, create, check_mode):
     """Ensures user is present
 
     Returns (msg, changed)"""
-    if hash_scheme in apache_hashes:
-        context = htpasswd_context
-    else:
-        context = CryptContext(schemes=[hash_scheme] + apache_hashes)
+    context = obtain_crypt_context(hash_scheme)
     if not os.path.exists(dest):
         if not create:
             raise ValueError(f"Destination {dest} does not exist")