add passlib for sha-512 salted hash generation

passlib/hosts.py

@@ -0,0 +1,115 @@
+"""passlib.hosts"""
+#=============================================================================
+# imports
+#=============================================================================
+# core
+import sys
+from warnings import warn
+# pkg
+from passlib.context import LazyCryptContext
+from passlib.exc import PasslibRuntimeWarning
+from passlib.registry import get_crypt_handler
+from passlib.utils import has_crypt, unix_crypt_schemes
+# local
+__all__ = [
+    "linux_context", "linux2_context",
+    "openbsd_context",
+    "netbsd_context",
+    "freebsd_context",
+    "host_context",
+]
+
+#=============================================================================
+# linux support
+#=============================================================================
+
+# known platform names - linux2
+
+linux_context = linux2_context = LazyCryptContext(
+    schemes = [ "sha512_crypt", "sha256_crypt", "md5_crypt",
+               "des_crypt", "unix_disabled" ],
+    deprecated = [ "des_crypt" ],
+    )
+
+#=============================================================================
+# bsd support
+#=============================================================================
+
+# known platform names -
+#   freebsd2
+#   freebsd3
+#   freebsd4
+#   freebsd5
+#   freebsd6
+#   freebsd7
+#
+#   netbsd1
+
+# referencing source via -http://fxr.googlebit.com
+# freebsd 6,7,8 - des, md5, bcrypt, bsd_nthash
+# netbsd - des, ext, md5, bcrypt, sha1
+# openbsd - des, ext, md5, bcrypt
+
+freebsd_context = LazyCryptContext(["bcrypt", "md5_crypt", "bsd_nthash",
+                                    "des_crypt", "unix_disabled"])
+
+openbsd_context = LazyCryptContext(["bcrypt", "md5_crypt", "bsdi_crypt",
+                                    "des_crypt", "unix_disabled"])
+
+netbsd_context = LazyCryptContext(["bcrypt", "sha1_crypt", "md5_crypt",
+                                   "bsdi_crypt", "des_crypt", "unix_disabled"])
+
+# XXX: include darwin in this list? it's got a BSD crypt variant,
+# but that's not what it uses for user passwords.
+
+#=============================================================================
+# current host
+#=============================================================================
+if has_crypt:
+    # NOTE: this is basically mimicing the output of os crypt(),
+    # except that it uses passlib's (usually stronger) defaults settings,
+    # and can be introspected and used much more flexibly.
+
+    def _iter_os_crypt_schemes():
+        "helper which iterates over supported os_crypt schemes"
+        found = False
+        for name in unix_crypt_schemes:
+            handler = get_crypt_handler(name)
+            if handler.has_backend("os_crypt"):
+                found = True
+                yield name
+        if found:
+            # only offer disabled handler if there's another scheme in front,
+            # as this can't actually hash any passwords
+            yield "unix_disabled"
+        else: # pragma: no cover -- sanity check
+            # no idea what OS this could happen on...
+            warn("crypt.crypt() function is present, but doesn't support any "
+                 "formats known to passlib!", PasslibRuntimeWarning)
+
+    host_context = LazyCryptContext(_iter_os_crypt_schemes())
+
+#=============================================================================
+# other platforms
+#=============================================================================
+
+# known platform strings -
+# aix3
+# aix4
+# atheos
+# beos5
+# darwin
+# generic
+# hp-ux11
+# irix5
+# irix6
+# mac
+# next3
+# os2emx
+# riscos
+# sunos5
+# unixware7
+
+#=============================================================================
+# eof
+#=============================================================================