Use OpenSSH-style public keys as the preferred format of SSH public keys.

Public keys in the old format (raw RFC 4253 blob) are automatically
converted to OpenSSH-style public keys. OpenSSH-style public keys are now
stored in LDAP.

Changed sshpubkeyfp to be an output parameter, as that is what it actually
is.

Allow parameter normalizers to be used on values of any type, not just
unicode, so that public key blobs (which are str) can be normalized to
OpenSSH-style public keys.

ticket 2932, 2935

ipalib/util.py

@@ -34,7 +34,7 @@ from dns.exception import DNSException
 
 from ipalib import errors
 from ipalib.text import _
-from ipapython.ipautil import decode_ssh_pubkey
+from ipapython.ssh import SSHPublicKey
 from ipapython.dn import DN, RDN
 
 
@@ -266,37 +266,55 @@ def validate_hostname(hostname, check_fqdn=True, allow_underscore=False):
     else:
         validate_domain_name(hostname,allow_underscore)
 
-def validate_sshpubkey(ugettext, pubkey):
+def normalize_sshpubkey(value):
+    return SSHPublicKey(value).openssh()
+
+def validate_sshpubkey(ugettext, value):
     try:
-        algo, data, fp = decode_ssh_pubkey(pubkey)
-    except ValueError:
+        SSHPublicKey(value)
+    except ValueError, UnicodeDecodeError:
         return _('invalid SSH public key')
 
-def output_sshpubkey(ldap, dn, entry_attrs):
+def validate_sshpubkey_no_options(ugettext, value):
+    try:
+        pubkey = SSHPublicKey(value)
+    except ValueError, UnicodeDecodeError:
+        return _('invalid SSH public key')
+
+    if pubkey.has_options():
+        return _('options are not allowed')
+
+def convert_sshpubkey_post(ldap, dn, entry_attrs):
     if 'ipasshpubkey' in entry_attrs:
-        pubkeys = entry_attrs.get('ipasshpubkey')
+        pubkeys = entry_attrs.pop('ipasshpubkey')
     else:
-        entry = ldap.get_entry(dn, ['ipasshpubkey'])
-        pubkeys = entry[1].get('ipasshpubkey')
-    if pubkeys is None:
+        old_entry_attrs = ldap.get_entry(dn, ['ipasshpubkey'])
+        pubkeys = old_entry_attrs[1].get('ipasshpubkey')
+    if not pubkeys:
         return
 
+    newpubkeys = []
     fingerprints = []
     for pubkey in pubkeys:
         try:
-            algo, data, fp = decode_ssh_pubkey(pubkey)
-            fp = u':'.join([fp[j:j+2] for j in range(0, len(fp), 2)])
-            fingerprints.append(u'%s (%s)' % (fp, algo))
-        except ValueError:
-            pass
+            pubkey = SSHPublicKey(pubkey)
+        except ValueError, UnicodeDecodeError:
+            continue
+
+        fp = pubkey.fingerprint_hex_md5()
+        comment = pubkey.comment()
+        if comment:
+            fp = u'%s %s' % (fp, comment)
+        fp = u'%s (%s)' % (fp, pubkey.keytype())
+
+        newpubkeys.append(pubkey.openssh())
+        fingerprints.append(fp)
+
+    if newpubkeys:
+        entry_attrs['ipasshpubkey'] = newpubkeys
     if fingerprints:
         entry_attrs['sshpubkeyfp'] = fingerprints
 
-def normalize_sshpubkeyfp(value):
-    value = value.split()[0]
-    value = unicode(c for c in value if c in '0123456789ABCDEFabcdef')
-    return value
-
 class cachedproperty(object):
     """
     A property-like attribute that caches the return value of a method call.