1 | #!/usr/local/bin/python |
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2 | |
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3 | import os,sys |
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4 | |
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5 | from BaseHTTPServer import BaseHTTPRequestHandler |
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6 | from ZSI import * |
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7 | from M2Crypto import SSL |
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8 | from M2Crypto.m2xmlrpclib import SSL_Transport |
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9 | from M2Crypto.SSL.SSLServer import SSLServer |
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10 | import M2Crypto.httpslib |
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11 | import xmlrpclib |
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12 | |
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13 | import re |
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14 | import string |
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15 | import copy |
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16 | import pickle |
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17 | |
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18 | from fedd_access_project import access_project |
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19 | from fedd_services import * |
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20 | from fedd_util import * |
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21 | from fedd_allocate_project import * |
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22 | import parse_detail |
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23 | from service_error import * |
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24 | import logging |
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25 | |
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26 | |
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27 | # Make log messages disappear if noone configures a fedd logger |
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28 | class nullHandler(logging.Handler): |
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29 | def emit(self, record): pass |
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30 | |
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31 | fl = logging.getLogger("fedd.access") |
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32 | fl.addHandler(nullHandler()) |
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33 | |
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34 | class fedd_access: |
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35 | """ |
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36 | The implementation of access control based on mapping users to projects. |
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37 | |
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38 | Users can be mapped to existing projects or have projects created |
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39 | dynamically. This implements both direct requests and proxies. |
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40 | """ |
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41 | |
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42 | class parse_error(RuntimeError): pass |
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43 | |
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44 | bool_attrs = ("dynamic_projects", "project_priority") |
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45 | emulab_attrs = ("boss", "ops", "domain", "fileserver", "eventserver") |
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46 | id_attrs = ("testbed", "proxy", |
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47 | "proxy_cert_file", "proxy_cert_pwd", "proxy_trusted_certs", |
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48 | "dynamic_projects_url", "dynamic_projects_cert_file", |
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49 | "dynamic_projects_cert_pwd", "dynamic_projects_trusted_certs") |
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50 | id_list_attrs = ("restricted",) |
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51 | |
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52 | def read_trust(self, trust): |
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53 | """ |
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54 | Read a trust file that splits fedids into testbeds, users or projects |
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55 | |
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56 | Format is: |
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57 | |
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58 | [type] |
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59 | fedid |
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60 | fedid |
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61 | default: type |
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62 | """ |
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63 | lineno = 0; |
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64 | cat = None |
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65 | cat_re = re.compile("\[(user|testbed|project)\]$", re.IGNORECASE) |
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66 | fedid_re = re.compile("[" + string.hexdigits + "]+$") |
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67 | default_re = re.compile("default:\s*(user|testbed|project)$", |
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68 | re.IGNORECASE) |
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69 | |
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70 | f = open(trust, "r") |
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71 | for line in f: |
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72 | lineno += 1 |
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73 | line = line.strip() |
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74 | if len(line) == 0 or line.startswith("#"): |
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75 | continue |
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76 | # Category line |
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77 | m = cat_re.match(line) |
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78 | if m != None: |
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79 | cat = m.group(1).lower() |
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80 | continue |
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81 | # Fedid line |
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82 | m = fedid_re.match(line) |
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83 | if m != None: |
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84 | if cat != None: |
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85 | self.fedid_category[fedid(hexstr=m.string)] = cat |
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86 | else: |
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87 | raise self.parse_error(\ |
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88 | "Bad fedid in trust file (%s) line: %d" % \ |
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89 | (trust, lineno)) |
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90 | continue |
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91 | # default line |
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92 | m = default_re.match(line) |
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93 | if m != None: |
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94 | self.fedid_default = m.group(1).lower() |
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95 | continue |
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96 | # Nothing matched - bad line, raise exception |
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97 | f.close() |
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98 | raise self.parse_error(\ |
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99 | "Unparsable line in trustfile %s line %d" % (trust, lineno)) |
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100 | f.close() |
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101 | |
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102 | def read_access(self, config): |
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103 | """ |
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104 | Read a configuration file and set internal parameters. |
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105 | |
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106 | The format is more complex than one might hope. The basic format is |
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107 | attribute value pairs separated by colons(:) on a signle line. The |
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108 | attributes in bool_attrs, emulab_attrs and id_attrs can all be set |
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109 | directly using the name: value syntax. E.g. |
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110 | boss: hostname |
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111 | sets self.boss to hostname. In addition, there are access lines of the |
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112 | form (tb, proj, user) -> (aproj, auser) that map the first tuple of |
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113 | names to the second for access purposes. Names in the key (left side) |
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114 | can include "<NONE> or <ANY>" to act as wildcards or to require the |
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115 | fields to be empty. Similarly aproj or auser can be <SAME> or |
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116 | <DYNAMIC> indicating that either the matching key is to be used or a |
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117 | dynamic user or project will be created. These names can also be |
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118 | federated IDs (fedid's) if prefixed with fedid:. Finally, the aproj |
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119 | can be followed with a colon-separated list of node types to which that |
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120 | project has access (or will have access if dynamic). |
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121 | Testbed attributes outside the forms above can be given using the |
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122 | format attribute: name value: value. The name is a single word and the |
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123 | value continues to the end of the line. Empty lines and lines startin |
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124 | with a # are ignored. |
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125 | |
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126 | Parsing errors result in a self.parse_error exception being raised. |
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127 | """ |
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128 | lineno=0 |
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129 | name_expr = "["+string.ascii_letters + string.digits + "\.\-_]+" |
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130 | fedid_expr = "fedid:[" + string.hexdigits + "]+" |
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131 | key_name = "(<ANY>|<NONE>|"+fedid_expr + "|"+ name_expr + ")" |
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132 | access_proj = "(<DYNAMIC>(?::" + name_expr +")*|"+ \ |
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133 | "<SAME>" + "(?::" + name_expr + ")*|" + \ |
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134 | fedid_expr + "(?::" + name_expr + ")*|" + \ |
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135 | name_expr + "(?::" + name_expr + ")*)" |
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136 | access_name = "(<DYNAMIC>|<SAME>|" + fedid_expr + "|"+ name_expr + ")" |
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137 | |
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138 | restricted_re = re.compile("restricted:\s*(.*)", re.IGNORECASE) |
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139 | attr_re = re.compile('attribute:\s*([\._\-a-z0-9]+)\s+value:\s*(.*)', |
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140 | re.IGNORECASE) |
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141 | access_re = re.compile('\('+key_name+'\s*,\s*'+key_name+'\s*,\s*'+ |
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142 | key_name+'\s*\)\s*->\s*\('+access_proj + '\s*,\s*' + |
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143 | access_name + '\s*,\s*' + access_name + '\s*\)', re.IGNORECASE) |
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144 | |
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145 | def parse_name(n): |
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146 | if n.startswith('fedid:'): return fedid(n[len('fedid:'):]) |
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147 | else: return n |
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148 | |
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149 | f = open(config, "r"); |
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150 | for line in f: |
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151 | lineno += 1 |
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152 | line = line.strip(); |
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153 | if len(line) == 0 or line.startswith('#'): |
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154 | continue |
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155 | |
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156 | # Extended (attribute: x value: y) attribute line |
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157 | m = attr_re.match(line) |
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158 | if m != None: |
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159 | attr, val = m.group(1,2) |
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160 | self.attrs[attr] = val |
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161 | continue |
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162 | |
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163 | # Restricted entry |
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164 | m = restricted_re.match(line) |
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165 | if m != None: |
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166 | val = m.group(1) |
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167 | self.restricted.append(val) |
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168 | continue |
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169 | |
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170 | # Access line (t, p, u) -> (ap, cu, su) line |
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171 | m = access_re.match(line) |
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172 | if m != None: |
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173 | access_key = tuple([ parse_name(x) for x in m.group(1,2,3)]) |
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174 | aps = m.group(4).split(":"); |
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175 | if aps[0] == 'fedid:': |
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176 | del aps[0] |
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177 | aps[0] = fedid(hexstr=aps[0]) |
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178 | |
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179 | cu = parse_name(m.group(5)) |
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180 | su = parse_name(m.group(6)) |
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181 | |
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182 | access_val = (access_project(aps[0], aps[1:]), |
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183 | parse_name(m.group(5)), parse_name(m.group(6))) |
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184 | |
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185 | self.access[access_key] = access_val |
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186 | continue |
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187 | |
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188 | # Nothing matched to here: unknown line - raise exception |
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189 | f.close() |
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190 | raise self.parse_error("Unknown statement at line %d of %s" % \ |
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191 | (lineno, config)) |
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192 | f.close() |
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193 | |
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194 | |
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195 | def __init__(self, config=None): |
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196 | """ |
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197 | Initializer. Pulls parameters out of the ConfigParser's access section. |
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198 | """ |
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199 | |
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200 | # Make sure that the configuration is in place |
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201 | if config: |
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202 | if not config.has_section("access"): |
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203 | config.add_section("access") |
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204 | if not config.has_section("globals"): |
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205 | config.add_section("globals") |
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206 | else: |
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207 | raise RunTimeError("No config to fedd_access") |
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208 | |
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209 | |
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210 | # Create instance attributes from the static lists |
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211 | for a in fedd_access.bool_attrs: |
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212 | if config.has_option("access", a): |
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213 | setattr(self, a, config.get("access", a)) |
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214 | else: |
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215 | setattr(self, a, False) |
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216 | |
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217 | for a in fedd_access.emulab_attrs + fedd_access.id_attrs: |
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218 | if config.has_option("access", a): |
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219 | setattr(self, a, config.get("access",a)) |
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220 | else: |
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221 | setattr(self, a, None) |
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222 | |
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223 | self.attrs = { } |
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224 | self.access = { } |
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225 | self.restricted = [ ] |
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226 | self.fedid_category = { } |
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227 | self.projects = { } |
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228 | self.keys = { } |
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229 | self.allocation = { } |
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230 | self.state = { |
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231 | 'projects': self.projects, |
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232 | 'allocation' : self.allocation, |
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233 | 'keys' : self.keys |
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234 | } |
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235 | self.fedid_default = "testbed" |
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236 | if config.has_option("access", "accessdb"): |
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237 | self.read_access(config.get("access", "accessdb")) |
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238 | if config.has_option("access", "trustdb"): |
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239 | self.read_trust(config.get("access", "trustdb")) |
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240 | |
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241 | self.state_filename = config.get("access", "access_state", "") |
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242 | self.log = logging.getLogger("fedd.access") |
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243 | self.read_state() |
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244 | |
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245 | |
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246 | # Certs are promoted from the generic to the specific, so without a |
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247 | # specific proxy certificate, the main certificates are used for |
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248 | # proxy interactions. If no dynamic project certificates, then |
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249 | # proxy certs are used, and if none of those the main certs. |
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250 | |
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251 | if config.has_option("globals", "proxy_cert_file"): |
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252 | if not self.dynamic_projects_cert_file: |
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253 | self.dynamic_projects_cert_file = \ |
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254 | config.get("globals", "proxy_cert_file") |
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255 | if config.has_option("globals", "porxy_cert_pwd"): |
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256 | self.dynamic_projects_cert_pwd = \ |
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257 | config.get("globals", "proxy_cert_pwd") |
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258 | |
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259 | if config.has_option("globals", "proxy_trusted_certs"): |
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260 | if not self.dynamic_projects_trusted_certs: |
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261 | self.dynamic_projects_trusted_certs =\ |
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262 | config.get("globals", proxy_trusted_certs) |
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263 | |
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264 | if config.has_option("globals", "cert_file"): |
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265 | has_pwd = config.has_option("globals", "cert_pwd") |
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266 | if not self.dynamic_projects_cert_file: |
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267 | self.dynamic_projects_cert_file = \ |
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268 | config.get("globals", "cert_file") |
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269 | if has_pwd: |
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270 | self.dynamic_projects_cert_pwd = \ |
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271 | config.get("globals", "cert_pwd") |
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272 | if not self.proxy_cert_file: |
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273 | self.proxy_cert_file = config.get("globals", "cert_file") |
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274 | if has_pwd: |
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275 | self.proxy_cert_pwd = config.get("globals", "cert_pwd") |
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276 | |
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277 | if config.get("globals", "trusted_certs"): |
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278 | if not self.proxy_trusted_certs: |
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279 | self.proxy_trusted_certs = \ |
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280 | config.get("globals", "trusted_certs") |
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281 | if not self.dynamic_projects_trusted_certs: |
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282 | self.dynamic_projects_trusted_certs = \ |
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283 | config.get("globals", "trusted_certs") |
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284 | |
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285 | proj_certs = (self.dynamic_projects_cert_file, |
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286 | self.dynamic_projects_trusted_certs, |
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287 | self.dynamic_projects_cert_pwd) |
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288 | |
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289 | self.soap_services = {\ |
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290 | 'RequestAccess': make_soap_handler(\ |
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291 | RequestAccessRequestMessage.typecode,\ |
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292 | self.RequestAccess, RequestAccessResponseMessage,\ |
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293 | "RequestAccessResponseBody"), \ |
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294 | 'ReleaseAccess': make_soap_handler(\ |
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295 | ReleaseAccessRequestMessage.typecode,\ |
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296 | self.ReleaseAccess, ReleaseAccessResponseMessage,\ |
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297 | "ReleaseAccessResponseBody")\ |
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298 | } |
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299 | self.xmlrpc_services = {\ |
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300 | 'RequestAccess': make_xmlrpc_handler(\ |
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301 | self.RequestAccess, "RequestAccessResponseBody"),\ |
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302 | 'ReleaseAccess': make_xmlrpc_handler(\ |
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303 | self.ReleaseAccess, "ReleaseAccessResponseBody")\ |
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304 | } |
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305 | |
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306 | |
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307 | if not config.has_option("access", "dynamic_projects_url"): |
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308 | self.allocate_project = \ |
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309 | fedd_allocate_project_local(config) |
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310 | else: |
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311 | self.allocate_project = \ |
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312 | fedd_allocate_project_remote(config) |
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313 | |
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314 | # If the project allocator exports services, put them in this object's |
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315 | # maps so that classes that instantiate this can call the services. |
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316 | self.soap_services.update(self.allocate_project.soap_services) |
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317 | self.xmlrpc_services.update(self.allocate_project.xmlrpc_services) |
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318 | |
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319 | def dump_state(self): |
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320 | """ |
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321 | Dump the state read from a configuration file. Mostly for debugging. |
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322 | """ |
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323 | for a in fedd_access.bool_attrs: |
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324 | print "%s: %s" % (a, getattr(self, a )) |
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325 | for a in fedd_access.emulab_attrs + fedd_access.id_attrs: |
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326 | print "%s: %s" % (a, getattr(self, a)) |
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327 | for k, v in self.attrs.iteritems(): |
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328 | print "%s %s" % (k, v) |
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329 | print "Access DB:" |
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330 | for k, v in self.access.iteritems(): |
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331 | print "%s %s" % (k, v) |
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332 | print "Trust DB:" |
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333 | for k, v in self.fedid_category.iteritems(): |
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334 | print "%s %s" % (k, v) |
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335 | print "Restricted: %s" % str(',').join(sorted(self.restricted)) |
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336 | |
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337 | def get_users(self, obj): |
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338 | """ |
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339 | Return a list of the IDs of the users in dict |
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340 | """ |
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341 | if obj.has_key('user'): |
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342 | return [ unpack_id(u['userID']) \ |
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343 | for u in obj['user'] if u.has_key('userID') ] |
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344 | else: |
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345 | return None |
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346 | |
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347 | def write_state(self): |
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348 | try: |
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349 | f = open(self.state_filename, 'w') |
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350 | pickle.dump(self.state, f) |
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351 | except IOError, e: |
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352 | self.log.error("Can't write file %s: %s" % \ |
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353 | (self.state_filename, e)) |
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354 | except pickle.PicklingError, e: |
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355 | self.log.error("Pickling problem: %s" % e) |
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356 | except TypeError, e: |
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357 | self.log.error("Pickling problem (TypeError): %s" % e) |
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358 | |
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359 | |
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360 | def read_state(self): |
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361 | """ |
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362 | Read a new copy of access state. Old state is overwritten. |
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363 | |
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364 | State format is a simple pickling of the state dictionary. |
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365 | """ |
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366 | try: |
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367 | f = open(self.state_filename, "r") |
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368 | self.state = pickle.load(f) |
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369 | |
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370 | self.allocation = self.state['allocation'] |
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371 | self.projects = self.state['projects'] |
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372 | self.keys = self.state['keys'] |
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373 | |
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374 | self.log.debug("[read_state]: Read state from %s" % \ |
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375 | self.state_filename) |
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376 | except IOError, e: |
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377 | self.log.warning("[read_state]: No saved state: Can't open %s: %s"\ |
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378 | % (self.state_filename, e)) |
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379 | except EOFError, e: |
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380 | self.log.warning("[read_state]: Empty or damaged state file: %s:"\ |
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381 | % self.state_filename) |
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382 | except pickle.UnpicklingError, e: |
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383 | self.log.warning(("[read_state]: No saved state: " + \ |
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384 | "Unpickling failed: %s") % e) |
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385 | |
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386 | |
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387 | def proxy_xmlrpc_request(self, dt, req): |
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388 | """Send an XMLRPC proxy request. Called if the SOAP RPC fails""" |
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389 | |
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390 | # No retry loop here. Proxy servers must correctly authenticate |
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391 | # themselves without help |
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392 | try: |
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393 | ctx = fedd_ssl_context(self.proxy_cert_file, |
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394 | self.proxy_trusted_certs, password=self.proxy_cert_pwd) |
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395 | except SSL.SSLError: |
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396 | raise service_error(service_error.server_config, |
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397 | "Server certificates misconfigured") |
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398 | |
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399 | # Of all the dumbass things. The XMLRPC library in use here won't |
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400 | # properly encode unicode strings, so we make a copy of req with the |
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401 | # unicode objects converted. We also convert the destination testbed |
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402 | # to a basic string if it isn't one already. |
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403 | if isinstance(dt, str): url = dt |
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404 | else: url = str(dt) |
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405 | |
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406 | r = strip_unicode(copy.deepcopy(req)) |
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407 | |
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408 | transport = SSL_Transport(ctx) |
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409 | port = xmlrpclib.ServerProxy(url, transport=transport) |
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410 | |
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411 | # Reconstruct the full request message |
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412 | try: |
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413 | resp = port.RequestAccess( |
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414 | { "RequestAccessRequestBody": r}) |
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415 | resp, method = xmlrpclib.loads(resp) |
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416 | except xmlrpclib.Fault, f: |
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417 | se = service_error(None, f.faultString, f.faultCode) |
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418 | raise se |
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419 | except xmlrpclib.Error, e: |
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420 | raise service_error(service_error.proxy, |
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421 | "Remote XMLRPC Fault: %s" % e) |
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422 | |
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423 | if resp[0].has_key('RequestAccessResponseBody'): |
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424 | return resp[0]['RequestAccessResponseBody'] |
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425 | else: |
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426 | raise service_error(service_error.proxy, |
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427 | "Bad proxy response") |
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428 | |
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429 | def proxy_request(self, dt, req): |
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430 | """ |
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431 | Send req on to the real destination in dt and return the response |
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432 | |
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433 | Req is just the requestType object. This function re-wraps it. It |
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434 | also rethrows any faults. |
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435 | """ |
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436 | # No retry loop here. Proxy servers must correctly authenticate |
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437 | # themselves without help |
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438 | try: |
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439 | ctx = fedd_ssl_context(self.proxy_cert_file, |
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440 | self.proxy_trusted_certs, password=self.proxy_cert_pwd) |
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441 | except SSL.SSLError: |
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442 | raise service_error(service_error.server_config, |
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443 | "Server certificates misconfigured") |
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444 | |
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445 | loc = feddServiceLocator(); |
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446 | port = loc.getfeddPortType(dt, |
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447 | transport=M2Crypto.httpslib.HTTPSConnection, |
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448 | transdict={ 'ssl_context' : ctx }) |
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449 | |
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450 | # Reconstruct the full request message |
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451 | msg = RequestAccessRequestMessage() |
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452 | msg.set_element_RequestAccessRequestBody( |
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453 | pack_soap(msg, "RequestAccessRequestBody", req)) |
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454 | try: |
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455 | resp = port.RequestAccess(msg) |
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456 | except ZSI.ParseException, e: |
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457 | raise service_error(service_error.proxy, |
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458 | "Bad format message (XMLRPC??): %s" % |
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459 | str(e)) |
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460 | r = unpack_soap(resp) |
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461 | |
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462 | if r.has_key('RequestAccessResponseBody'): |
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463 | return r['RequestAccessResponseBody'] |
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464 | else: |
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465 | raise service_error(service_error.proxy, |
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466 | "Bad proxy response") |
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467 | |
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468 | def permute_wildcards(self, a, p): |
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469 | """Return a copy of a with various fields wildcarded. |
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470 | |
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471 | The bits of p control the wildcards. A set bit is a wildcard |
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472 | replacement with the lowest bit being user then project then testbed. |
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473 | """ |
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474 | if p & 1: user = ["<any>"] |
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475 | else: user = a[2] |
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476 | if p & 2: proj = "<any>" |
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477 | else: proj = a[1] |
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478 | if p & 4: tb = "<any>" |
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479 | else: tb = a[0] |
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480 | |
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481 | return (tb, proj, user) |
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482 | |
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483 | def find_access(self, search): |
---|
484 | """ |
---|
485 | Search the access DB for a match on this tuple. Return the matching |
---|
486 | access tuple and the user that matched. |
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487 | |
---|
488 | NB, if the initial tuple fails to match we start inserting wildcards in |
---|
489 | an order determined by self.project_priority. Try the list of users in |
---|
490 | order (when wildcarded, there's only one user in the list). |
---|
491 | """ |
---|
492 | if self.project_priority: perm = (0, 1, 2, 3, 4, 5, 6, 7) |
---|
493 | else: perm = (0, 2, 1, 3, 4, 6, 5, 7) |
---|
494 | |
---|
495 | for p in perm: |
---|
496 | s = self.permute_wildcards(search, p) |
---|
497 | # s[2] is None on an anonymous, unwildcarded request |
---|
498 | if s[2] != None: |
---|
499 | for u in s[2]: |
---|
500 | if self.access.has_key((s[0], s[1], u)): |
---|
501 | return (self.access[(s[0], s[1], u)], u) |
---|
502 | else: |
---|
503 | if self.access.has_key(s): |
---|
504 | return (self.access[s], None) |
---|
505 | return None, None |
---|
506 | |
---|
507 | def lookup_access(self, req, fid): |
---|
508 | """ |
---|
509 | Determine the allowed access for this request. Return the access and |
---|
510 | which fields are dynamic. |
---|
511 | |
---|
512 | The fedid is needed to construct the request |
---|
513 | """ |
---|
514 | # Search keys |
---|
515 | tb = None |
---|
516 | project = None |
---|
517 | user = None |
---|
518 | # Return values |
---|
519 | rp = access_project(None, ()) |
---|
520 | ru = None |
---|
521 | |
---|
522 | |
---|
523 | principal_type = self.fedid_category.get(fid, self.fedid_default) |
---|
524 | |
---|
525 | if principal_type == "testbed": tb = fid |
---|
526 | |
---|
527 | if req.has_key('project'): |
---|
528 | p = req['project'] |
---|
529 | if p.has_key('name'): |
---|
530 | project = unpack_id(p['name']) |
---|
531 | user = self.get_users(p) |
---|
532 | else: |
---|
533 | user = self.get_users(req) |
---|
534 | |
---|
535 | # Now filter by prinicpal type |
---|
536 | if principal_type == "user": |
---|
537 | if user != None: |
---|
538 | fedids = [ u for u in user if isinstance(u, type(fid))] |
---|
539 | if len(fedids) > 1: |
---|
540 | raise service_error(service_error.req, |
---|
541 | "User asserting multiple fedids") |
---|
542 | elif len(fedids) == 1 and fedids[0] != fid: |
---|
543 | raise service_error(service_error.req, |
---|
544 | "User asserting different fedid") |
---|
545 | project = None |
---|
546 | tb = None |
---|
547 | elif principal_type == "project": |
---|
548 | if isinstance(project, type(fid)) and fid != project: |
---|
549 | raise service_error(service_error.req, |
---|
550 | "Project asserting different fedid") |
---|
551 | tb = None |
---|
552 | |
---|
553 | # Ready to look up access |
---|
554 | found, user_match = self.find_access((tb, project, user)) |
---|
555 | |
---|
556 | if found == None: |
---|
557 | raise service_error(service_error.access, |
---|
558 | "Access denied") |
---|
559 | |
---|
560 | # resolve <dynamic> and <same> in found |
---|
561 | dyn_proj = False |
---|
562 | dyn_create_user = False |
---|
563 | dyn_service_user = False |
---|
564 | |
---|
565 | if found[0].name == "<same>": |
---|
566 | if project != None: |
---|
567 | rp.name = project |
---|
568 | else : |
---|
569 | raise service_error(\ |
---|
570 | service_error.server_config, |
---|
571 | "Project matched <same> when no project given") |
---|
572 | elif found[0].name == "<dynamic>": |
---|
573 | rp.name = None |
---|
574 | dyn_proj = True |
---|
575 | else: |
---|
576 | rp.name = found[0].name |
---|
577 | rp.node_types = found[0].node_types; |
---|
578 | |
---|
579 | if found[1] == "<same>": |
---|
580 | if user_match == "<any>": |
---|
581 | if user != None: rcu = user[0] |
---|
582 | else: raise service_error(\ |
---|
583 | service_error.server_config, |
---|
584 | "Matched <same> on anonymous request") |
---|
585 | else: |
---|
586 | rcu = user_match |
---|
587 | elif found[1] == "<dynamic>": |
---|
588 | rcu = None |
---|
589 | dyn_create_user = True |
---|
590 | |
---|
591 | if found[2] == "<same>": |
---|
592 | if user_match == "<any>": |
---|
593 | if user != None: rsu = user[0] |
---|
594 | else: raise service_error(\ |
---|
595 | service_error.server_config, |
---|
596 | "Matched <same> on anonymous request") |
---|
597 | else: |
---|
598 | rsu = user_match |
---|
599 | elif found[2] == "<dynamic>": |
---|
600 | rsu = None |
---|
601 | dyn_service_user = True |
---|
602 | |
---|
603 | return (rp, rcu, rsu), (dyn_create_user, dyn_service_user, dyn_proj) |
---|
604 | |
---|
605 | def build_response(self, alloc_id, ap): |
---|
606 | """ |
---|
607 | Create the SOAP response. |
---|
608 | |
---|
609 | Build the dictionary description of the response and use |
---|
610 | fedd_utils.pack_soap to create the soap message. NB that alloc_id is |
---|
611 | a fedd_services_types.IDType_Holder pulled from the incoming message. |
---|
612 | ap is the allocate project message returned from a remote project |
---|
613 | allocation (even if that allocation was done locally). |
---|
614 | """ |
---|
615 | # Because alloc_id is already a fedd_services_types.IDType_Holder, |
---|
616 | # there's no need to repack it |
---|
617 | msg = { |
---|
618 | 'allocID': alloc_id, |
---|
619 | 'emulab': { |
---|
620 | 'domain': self.domain, |
---|
621 | 'boss': self.boss, |
---|
622 | 'ops': self.ops, |
---|
623 | 'fileServer': self.fileserver, |
---|
624 | 'eventServer': self.eventserver, |
---|
625 | 'project': ap['project'] |
---|
626 | }, |
---|
627 | } |
---|
628 | if len(self.attrs) > 0: |
---|
629 | msg['emulab']['fedAttr'] = \ |
---|
630 | [ { 'attribute': x, 'value' : y } \ |
---|
631 | for x,y in self.attrs.iteritems()] |
---|
632 | return msg |
---|
633 | |
---|
634 | def RequestAccess(self, req, fid): |
---|
635 | """ |
---|
636 | Handle the access request. Proxy if not for us. |
---|
637 | |
---|
638 | Parse out the fields and make the allocations or rejections if for us, |
---|
639 | otherwise, assuming we're willing to proxy, proxy the request out. |
---|
640 | """ |
---|
641 | |
---|
642 | # The dance to get into the request body |
---|
643 | if req.has_key('RequestAccessRequestBody'): |
---|
644 | req = req['RequestAccessRequestBody'] |
---|
645 | else: |
---|
646 | raise service_error(service_error.req, "No request!?") |
---|
647 | |
---|
648 | if req.has_key('destinationTestbed'): |
---|
649 | dt = unpack_id(req['destinationTestbed']) |
---|
650 | |
---|
651 | if dt == None or dt == self.testbed: |
---|
652 | # Request for this fedd |
---|
653 | found, dyn = self.lookup_access(req, fid) |
---|
654 | restricted = None |
---|
655 | ap = None |
---|
656 | |
---|
657 | # Check for access to restricted nodes |
---|
658 | if req.has_key('resources') and req['resources'].has_key('node'): |
---|
659 | resources = req['resources'] |
---|
660 | restricted = [ t for n in resources['node'] \ |
---|
661 | if n.has_key('hardware') \ |
---|
662 | for t in n['hardware'] \ |
---|
663 | if t in self.restricted ] |
---|
664 | inaccessible = [ t for t in restricted \ |
---|
665 | if t not in found[0].node_types] |
---|
666 | if len(inaccessible) > 0: |
---|
667 | raise service_error(service_error.access, |
---|
668 | "Access denied (nodetypes %s)" % \ |
---|
669 | str(', ').join(inaccessible)) |
---|
670 | # These collect the keys for teh two roles into single sets, one |
---|
671 | # for creation and one for service. The sets are a simple way to |
---|
672 | # eliminate duplicates |
---|
673 | create_ssh = set([ x['sshPubkey'] \ |
---|
674 | for x in req['createAccess'] \ |
---|
675 | if x.has_key('sshPubkey')]) |
---|
676 | |
---|
677 | service_ssh = set([ x['sshPubkey'] \ |
---|
678 | for x in req['serviceAccess'] \ |
---|
679 | if x.has_key('sshPubkey')]) |
---|
680 | |
---|
681 | if len(create_ssh) > 0 and len(service_ssh) >0: |
---|
682 | if dyn[1]: |
---|
683 | # Compose the dynamic project request |
---|
684 | # (only dynamic, dynamic currently allowed) |
---|
685 | preq = { 'AllocateProjectRequestBody': \ |
---|
686 | { 'project' : {\ |
---|
687 | 'user': [ \ |
---|
688 | { \ |
---|
689 | 'access': [ { 'sshPubkey': s } \ |
---|
690 | for s in service_ssh ], |
---|
691 | 'role': "serviceAccess",\ |
---|
692 | }, \ |
---|
693 | { \ |
---|
694 | 'access': [ { 'sshPubkey': s } \ |
---|
695 | for s in create_ssh ], |
---|
696 | 'role': "experimentCreation",\ |
---|
697 | }, \ |
---|
698 | ], \ |
---|
699 | }\ |
---|
700 | }\ |
---|
701 | } |
---|
702 | if restricted != None and len(restricted) > 0: |
---|
703 | preq['AllocateProjectRequestBody']['resources'] = \ |
---|
704 | [ {'node': { 'hardware' : [ h ] } } \ |
---|
705 | for h in restricted ] |
---|
706 | |
---|
707 | ap = self.allocate_project.dynamic_project(preq) |
---|
708 | else: |
---|
709 | preq = {'StaticProjectRequestBody' : \ |
---|
710 | { 'project': \ |
---|
711 | { 'name' : { 'localname' : found[0].name },\ |
---|
712 | 'user' : [ \ |
---|
713 | {\ |
---|
714 | 'userID': { 'localname' : found[1] }, \ |
---|
715 | 'access': [ { 'sshPubkey': s } |
---|
716 | for s in create_ssh ], |
---|
717 | 'role': 'experimentCreation'\ |
---|
718 | },\ |
---|
719 | {\ |
---|
720 | 'userID': { 'localname' : found[2] }, \ |
---|
721 | 'access': [ { 'sshPubkey': s } |
---|
722 | for s in service_ssh ], |
---|
723 | 'role': 'serviceAccess'\ |
---|
724 | },\ |
---|
725 | ]}\ |
---|
726 | }\ |
---|
727 | } |
---|
728 | if restricted != None and len(restricted) > 0: |
---|
729 | preq['StaticProjectRequestBody']['resources'] = \ |
---|
730 | [ {'node': { 'hardware' : [ h ] } } \ |
---|
731 | for h in restricted ] |
---|
732 | ap = self.allocate_project.static_project(preq) |
---|
733 | else: |
---|
734 | raise service_error(service_error.req, |
---|
735 | "SSH access parameters required") |
---|
736 | # keep track of what's been added |
---|
737 | if req['allocID'].has_key('fedid'): |
---|
738 | aid = unicode(req['allocId']['fedid']) |
---|
739 | elif req['allocID'].has_key('localname'): |
---|
740 | aid = req['allocID']['localname'] |
---|
741 | else: |
---|
742 | raise service_error(service_error.req, "Bad allocation ID") |
---|
743 | |
---|
744 | self.allocation[aid] = { } |
---|
745 | if dyn[1]: |
---|
746 | try: |
---|
747 | pname = ap['project']['name']['localname'] |
---|
748 | except KeyError: |
---|
749 | raise service_error(service_error.internal, |
---|
750 | "Misformed allocation response?") |
---|
751 | if self.projects.has_key(pname): self.projects[pname] += 1 |
---|
752 | else: self.projects[pname] = 1 |
---|
753 | self.allocation[aid]['project'] = pname |
---|
754 | |
---|
755 | self.allocation[aid]['keys'] = [ ] |
---|
756 | |
---|
757 | try: |
---|
758 | for u in ap['project']['user']: |
---|
759 | uname = u['userID']['localname'] |
---|
760 | for k in [ k['sshPubkey'] for k in u['access'] \ |
---|
761 | if k.has_key('sshPubkey') ]: |
---|
762 | kv = "%s:%s" % (uname, k) |
---|
763 | if self.keys.has_key(kv): self.keys[kv] += 1 |
---|
764 | else: self.keys[kv] = 1 |
---|
765 | self.allocation[aid]['keys'].append((uname, k)) |
---|
766 | except KeyError: |
---|
767 | raise service_error(service_error.internal, |
---|
768 | "Misformed allocation response?") |
---|
769 | |
---|
770 | self.write_state() |
---|
771 | resp = self.build_response(req['allocID'], ap) |
---|
772 | return resp |
---|
773 | else: |
---|
774 | p_fault = None # Any SOAP failure (sent unless XMLRPC works) |
---|
775 | try: |
---|
776 | # Proxy the request using SOAP |
---|
777 | return self.proxy_request(dt, req) |
---|
778 | except service_error, e: |
---|
779 | if e.code == service_error.proxy: p_fault = None |
---|
780 | else: raise |
---|
781 | except ZSI.FaultException, f: |
---|
782 | p_fault = f.fault.detail[0] |
---|
783 | |
---|
784 | |
---|
785 | # If we could not get a valid SOAP response to the request above, |
---|
786 | # try the same address using XMLRPC and let any faults flow back |
---|
787 | # out. |
---|
788 | if p_fault == None: |
---|
789 | return self.proxy_xmlrpc_request(dt, req) |
---|
790 | else: |
---|
791 | # Build the fault |
---|
792 | body = p_fault.get_element_FeddFaultBody() |
---|
793 | if body != None: |
---|
794 | raise service_error(body.get_element_code(), |
---|
795 | body.get_element_desc()); |
---|
796 | else: |
---|
797 | raise service_error(\ |
---|
798 | service_error.proxy, |
---|
799 | "Undefined fault from proxy??"); |
---|
800 | |
---|
801 | def ReleaseAccess(self, req, fid): |
---|
802 | # The dance to get into the request body |
---|
803 | if req.has_key('ReleaseAccessRequestBody'): |
---|
804 | req = req['ReleaseAccessRequestBody'] |
---|
805 | else: |
---|
806 | raise service_error(service_error.req, "No request!?") |
---|
807 | |
---|
808 | print req |
---|
809 | try: |
---|
810 | if req['allocID'].has_key('localname'): |
---|
811 | aid = req['allocID']['localname'] |
---|
812 | elif req['allocID'].has_key('fedid'): |
---|
813 | aid = unicode(req['allocID']['fedid']) |
---|
814 | else: |
---|
815 | raise service_error(service_error.req, |
---|
816 | "Only localnames and fedids are understood") |
---|
817 | except KeyError: |
---|
818 | raise service_error(service_error.req, "Badly formed request") |
---|
819 | |
---|
820 | # If we know this allocation, reduce the reference counts and remove |
---|
821 | # the local allocations. Otherwise report an error. If there is an |
---|
822 | # allocation to delete, del_users will be a dictonary of sets where the |
---|
823 | # key is the user that owns the keys in the set. We use a set to avoid |
---|
824 | # duplicates. del_project is just the name of any dynamic project to |
---|
825 | # delete. |
---|
826 | del_users = { } |
---|
827 | del_project = None |
---|
828 | if self.allocation.has_key(aid): |
---|
829 | for k in self.allocation[aid]['keys']: |
---|
830 | kk = "%s:%s" % k |
---|
831 | self.keys[kk] -= 1 |
---|
832 | if self.keys[kk] == 0: |
---|
833 | if not del_users.has_key(k[0]): |
---|
834 | del_users[k[0]] = set() |
---|
835 | del_users[k[0]].add(k[1]) |
---|
836 | del self.keys[kk] |
---|
837 | |
---|
838 | if self.allocation[aid].has_key('project'): |
---|
839 | pname = self.allocation[aid]['project'] |
---|
840 | self.projects[pname] -= 1 |
---|
841 | if self.projects[pname] == 0: |
---|
842 | del_project = pname |
---|
843 | del self.projects[pname] |
---|
844 | |
---|
845 | del self.allocation[aid] |
---|
846 | # If we actually have resources to deallocate, prepare the call. |
---|
847 | if del_project or del_users: |
---|
848 | msg = { 'project': { }} |
---|
849 | if del_project: |
---|
850 | msg['project']['name']['localname'] = del_project |
---|
851 | users = [ ] |
---|
852 | for u in del_users.keys(): |
---|
853 | users.append({ 'userID': { 'localname': u },\ |
---|
854 | 'access' : \ |
---|
855 | [ {'sshPubkey' : s } for s in del_users[u]]\ |
---|
856 | }) |
---|
857 | if users: |
---|
858 | msg['project']['user'] = users |
---|
859 | if self.allocate_project.release_project: |
---|
860 | msg = { 'ReleaseProjectRequestBody' : msg} |
---|
861 | self.allocate_project.release_project(msg) |
---|
862 | self.write_state() |
---|
863 | return { 'allocID': req['allocID'] } |
---|
864 | else: |
---|
865 | raise service_error(service_error.req, "No such allocation") |
---|
866 | |
---|
867 | |
---|
868 | |
---|