| 1 | #!/usr/local/bin/python |
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| 2 | |
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| 3 | import sys, os |
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| 4 | import re |
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| 5 | |
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| 6 | from federation.fedid import fedid |
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| 7 | from optparse import OptionParser, OptionValueError |
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| 8 | |
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| 9 | class attribute: |
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| 10 | def __init__(self, p, a): |
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| 11 | self.principal = p |
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| 12 | self.attr = a |
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| 13 | |
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| 14 | def __str__(self): |
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| 15 | return "%s.%s" % (self.principal, self.attr) |
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| 16 | |
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| 17 | class credential: |
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| 18 | def __init__(self, p, a, req): |
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| 19 | self.principal = p |
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| 20 | if isinstance(a, (tuple, list, set)) and len(a) == 1: |
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| 21 | self.attr = a[0] |
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| 22 | else: |
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| 23 | self.attr = a |
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| 24 | self.req = req |
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| 25 | |
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| 26 | def __str__(self): |
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| 27 | if isinstance(self.req, (tuple, list, set)): |
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| 28 | return "%s.%s <- %s" % (self.principal, self.attr, |
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| 29 | " & ".join(["%s" % r for r in self.req])) |
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| 30 | else: |
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| 31 | return "%s.%s <- %s" % (self.principal, self.attr, self.req) |
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| 32 | |
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| 33 | class parse_error(RuntimeError): pass |
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| 34 | |
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| 35 | def parse_emulab(l, creds, me, to_id, p, gp, gu): |
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| 36 | right_side_str = '\s*,\s*\(\s*%s\s*,\s*%s\s*,\s*%s\s*\)' % \ |
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| 37 | (id_same_str, id_same_str,id_same_str) |
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| 38 | |
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| 39 | m = re.match(right_side_str, l) |
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| 40 | if m: |
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| 41 | project, user = m.group(1,2) |
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| 42 | if project == '<same>': |
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| 43 | if gp is not None: |
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| 44 | project = gp |
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| 45 | else: |
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| 46 | raise parse_error("Project cannot be decisively mapped: %s" % l) |
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| 47 | if user == '<same>': |
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| 48 | if gu is not None: |
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| 49 | project = gu |
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| 50 | else: |
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| 51 | raise parse_error("User cannot be decisively mapped: %s" % l) |
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| 52 | if project and user: |
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| 53 | a = 'project_%s_user_%s' % (project, user) |
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| 54 | elif project: |
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| 55 | a = 'project_%s' % project |
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| 56 | elif user: |
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| 57 | a = 'user_%s' % user |
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| 58 | else: |
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| 59 | raise parse_error("No mapping for %s/%s!?" % (gp, gu)) |
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| 60 | |
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| 61 | c = credential(me, a, |
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| 62 | [attribute(p, x) for x in (gp, gu) if x is not None]) |
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| 63 | creds.add(c) |
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| 64 | if (project, user) in to_id: to_id[(project,user)].append(c) |
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| 65 | else: to_id[(project,user)] = [ c ] |
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| 66 | else: |
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| 67 | raise parse_error("Badly formatted local mapping: %s" % l) |
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| 68 | |
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| 69 | |
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| 70 | def parse_protogeni(l, creds, me, to_id, p, gp, gu): |
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| 71 | right_side_str = '\s*,\s*\(\s*(%s)\s*,\s*(%s)\s*,\s*(%s)\s*,\s*(%s)\s*\)' \ |
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| 72 | % (path_str, id_str, path_str, id_str) |
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| 73 | |
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| 74 | m = re.match(right_side_str, l) |
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| 75 | if m: |
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| 76 | cert, user, key, pw = m.group(1,2,3,4) |
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| 77 | acert = re.sub('/', '_', cert) |
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| 78 | |
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| 79 | a = "cert_%s_user_%s" % (acert, user) |
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| 80 | c = credential(me, a, |
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| 81 | [attribute(p, x) for x in (gp, gu) if x is not None]) |
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| 82 | creds.add(c) |
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| 83 | if (cert, user, key, pw) in to_id: |
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| 84 | to_id[(cert, user, key, pw)].append(c) |
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| 85 | else: |
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| 86 | to_id[(cert, user, key, pw)] = [ c ] |
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| 87 | else: |
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| 88 | raise parse_error("Badly formatted local mapping: %s" % l) |
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| 89 | |
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| 90 | def parse_dragon(l, creds, me, to_id, p, gp, gu): |
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| 91 | right_side_str = '\s*,\s*\(\s*(%s)\s*\)' % \ |
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| 92 | (id_str) |
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| 93 | |
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| 94 | m = re.match(right_side_str, l) |
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| 95 | if m: |
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| 96 | repo= m.group(1) |
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| 97 | c = credential(me, 'repo_%s' % repo, |
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| 98 | [attribute(p, x) for x in (gp, gu) if x is not None]) |
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| 99 | creds.add(c) |
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| 100 | if repo in to_id: to_id[repo].append(c) |
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| 101 | else: to_id[repo] = [ c ] |
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| 102 | else: |
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| 103 | raise parse_error("Badly formatted local mapping: %s" % l) |
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| 104 | |
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| 105 | parse_skel = parse_dragon |
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| 106 | |
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| 107 | def parse_internal(l, creds, me, to_id, p, gp, gu): pass |
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| 108 | |
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| 109 | |
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| 110 | class access_opts(OptionParser): |
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| 111 | mappers = { |
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| 112 | 'emulab': parse_emulab, |
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| 113 | 'dragon': parse_dragon, |
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| 114 | 'internal': parse_internal, |
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| 115 | 'skel': parse_skel, |
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| 116 | 'protogeni': parse_protogeni, |
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| 117 | } |
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| 118 | |
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| 119 | @staticmethod |
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| 120 | def parse_mapper(opt, s, val, parser, dest): |
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| 121 | if val in access_opts.mappers: |
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| 122 | setattr(parser.values, dest, access_opts.mappers[val]) |
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| 123 | else: |
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| 124 | raise OptionValueError('%s must be one of %s' % \ |
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| 125 | (s, ", ".join(access_opts.mappers.keys()))) |
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| 126 | |
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| 127 | def __init__(self): |
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| 128 | OptionParser.__init__(self, usage='%prog [opts] file [...]') |
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| 129 | self.add_option('--cert', dest='cert', default=None, |
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| 130 | help='my fedid as an X.509 certificate') |
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| 131 | self.add_option('--key', dest='key', default=None, |
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| 132 | help='key for the certificate') |
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| 133 | self.add_option('--dir', dest='dir', default=None, |
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| 134 | help='Output directory for credentials') |
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| 135 | self.add_option('--type', action='callback', nargs=1, type='str', |
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| 136 | callback=access_opts.parse_mapper, |
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| 137 | callback_kwargs = { 'dest': 'mapper'}, |
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| 138 | help='Type of access file to parse. One of %s. ' %\ |
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| 139 | ", ".join(access_opts.mappers.keys()) + \ |
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| 140 | 'Omit for generic parsing.') |
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| 141 | self.add_option('--quiet', dest='quiet', action='store_true', |
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| 142 | default=False, |
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| 143 | help='Do not print credential to local attribute map') |
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| 144 | self.add_option('--create-creds', action='store_true', |
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| 145 | dest='create_creds', default=False, |
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| 146 | help='create credentials for rules. Requires ' + \ |
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| 147 | '--cert, --key, and --dir to be given.') |
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| 148 | self.set_defaults(mapper=None) |
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| 149 | |
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| 150 | def create_creds(creds, cert, key, dir, creddy='/usr/local/bin/creddy'): |
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| 151 | def attrs(r): |
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| 152 | if r.principal and r.attr: |
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| 153 | return ['--subject-id=%s' % r.principal, |
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| 154 | '--subject-role=%s' %r.attr] |
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| 155 | elif r.principal: |
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| 156 | return ['--subject-id=%s' % r.prinicpal] |
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| 157 | else: |
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| 158 | raise parse_error('Attribute without a principal?') |
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| 159 | |
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| 160 | for i, c in enumerate(creds): |
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| 161 | cmd = [creddy, '--attribute', '--issuer=%s' % cert, '--key=%s' % key, |
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| 162 | '--role=%s' % c.attr, '--out=%s/cred%d' % (dir, i)] |
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| 163 | for r in c.req: |
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| 164 | cmd.extend(attrs(r)) |
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| 165 | print " ".join(cmd) |
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| 166 | |
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| 167 | comment_re = re.compile('^\s*#|^$') |
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| 168 | fedid_str = 'fedid:([0-9a-fA-F]{40})' |
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| 169 | id_str = '[a-zA-Z][\w_-]*' |
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| 170 | path_str = '[a-zA-Z_/\.-]+' |
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| 171 | id_any_str = '(%s|<any>)' % id_str |
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| 172 | id_same_str = '(%s|<same>)' % id_str |
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| 173 | left_side_str = '\(\s*%s\s*,\s*%s\s*,\s*%s\s*\)' % \ |
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| 174 | (fedid_str, id_any_str, id_any_str) |
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| 175 | right_side_str = '(%s)(\s*,\s*\(.*\))?' % (id_str) |
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| 176 | line_re = re.compile('%s\s*->\s*%s' % (left_side_str, right_side_str)) |
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| 177 | |
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| 178 | p = access_opts() |
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| 179 | opts, args = p.parse_args() |
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| 180 | |
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| 181 | if len(args) < 1: |
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| 182 | sys.exit('No filenames given to parse') |
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| 183 | |
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| 184 | if opts.cert: |
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| 185 | try: |
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| 186 | me = fedid(file=opts.cert) |
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| 187 | except EnvironmentError, e: |
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| 188 | sys.exit('Bad --cert: %s (%s)' % (e.strerror, e.filename or '?!')) |
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| 189 | else: |
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| 190 | print >>sys.stderr, 'No --cert, using dummy fedid' |
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| 191 | me = fedid(hexstr='0123456789012345678901234567890123456789') |
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| 192 | |
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| 193 | if opts.key and not os.access(opts.key, os.R_OK): |
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| 194 | sys.exit('Cannot read key (%s)' % opts.key) |
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| 195 | |
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| 196 | if opts.dir: |
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| 197 | if not os.path.isdir(opts.dir): |
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| 198 | sys.exit('%s is not a directory' % opts.dir) |
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| 199 | elif not os.access(opts.dir, os.W_OK): |
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| 200 | sys.exit('%s is not writable' % opts.dir) |
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| 201 | |
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| 202 | mapper = opts.mapper |
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| 203 | |
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| 204 | for fn in args: |
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| 205 | creds = set() |
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| 206 | to_id = { } |
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| 207 | try: |
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| 208 | f = open(fn, "r") |
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| 209 | for i, l in enumerate(f): |
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| 210 | try: |
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| 211 | if comment_re.match(l): |
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| 212 | continue |
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| 213 | else: |
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| 214 | m = line_re.match(l) |
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| 215 | if m: |
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| 216 | p, da = m.group(1, 4) |
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| 217 | gp, gu = m.group(2, 3) |
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| 218 | if gp == '<any>': gp = None |
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| 219 | if gu == '<any>': gu = None |
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| 220 | |
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| 221 | creds.add(credential(me, da, |
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| 222 | [attribute(p, x) for x in (gp, gu) \ |
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| 223 | if x is not None])) |
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| 224 | if m.group(5) and mapper: |
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| 225 | mapper(m.group(5), creds, me, to_id, p, gp, gu) |
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| 226 | else: |
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| 227 | raise parse_error('Syntax error') |
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| 228 | except parse_error, e: |
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| 229 | raise parse_error('Error on line %d of %s: %s' % \ |
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| 230 | (i, fn, e.message)) |
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| 231 | |
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| 232 | f.close() |
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| 233 | except parse_error, e: |
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| 234 | print >> sys.stderr, "%s" % e |
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| 235 | continue |
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| 236 | |
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| 237 | except EnvironmentError, e: |
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| 238 | print >>sys.stderr, "File error %s: %s" % \ |
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| 239 | (e.filename or '!?', e.strerror) |
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| 240 | continue |
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| 241 | |
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| 242 | if opts.create_creds: |
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| 243 | if all([opts.cert, opts.key, opts.dir]): |
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| 244 | create_creds([c for c in creds if c.principal == me], |
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| 245 | opts.cert, opts.key, opts.dir) |
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| 246 | else: |
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| 247 | print >>sys.stderr, 'Cannot create credentials. Missing parameter' |
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| 248 | |
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| 249 | if not opts.quiet: |
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| 250 | for k, c in to_id.items(): |
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| 251 | for a in set(["%s.%s" % (x.principal, x.attr) for x in c]): |
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| 252 | print "%s -> (%s)" % ( a, ", ".join(k)) |
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