| 1 | #!/usr/bin/env python |
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| 2 | |
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| 3 | """ |
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| 4 | See README in this directory for the semantics of the example. This file |
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| 5 | constructs the credentials described and puts copies into this directory |
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| 6 | |
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| 7 | cmd1:env keystore=`pwd` ./attr.py |
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| 8 | """ |
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| 9 | |
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| 10 | import os |
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| 11 | import ABAC |
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| 12 | |
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| 13 | ctxt = ABAC.Context() |
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| 14 | print "ABAC version %s" % ctxt.version() |
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| 15 | |
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| 16 | # Keystore is the directory containing the principal credentials. |
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| 17 | # Load existing principals and/or policy credentials |
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| 18 | if (os.environ.has_key("keystore")) : |
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| 19 | keystore=os.environ["keystore"] |
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| 20 | ctxt.load_directory(keystore) |
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| 21 | |
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| 22 | out = ctxt.context_principals() |
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| 23 | print "...initial principal set..." |
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| 24 | for x in out[1]: |
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| 25 | print "%s " % x.string() |
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| 26 | print "\n" |
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| 27 | |
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| 28 | out = ctxt.context_credentials() |
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| 29 | print "...initial policy attribute set..." |
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| 30 | for c in out[1]: |
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| 31 | print "%s <- %s" % (c.head_string(), c.tail_string()) |
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| 32 | print "\n" |
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| 33 | |
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| 34 | # retrieve principals' keyid value from local credential files |
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| 35 | isiID=ABAC.ID("ISI_ID.pem") |
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| 36 | isiID.id_load_privkey_file("ISI_private.pem"); |
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| 37 | isi=isiID.id_keyid() |
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| 38 | |
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| 39 | uscID=ABAC.ID("USC_ID.pem") |
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| 40 | uscID.id_load_privkey_file("USC_private.pem"); |
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| 41 | usc=uscID.id_keyid() |
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| 42 | |
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| 43 | maryannID=ABAC.ID("Maryann_ID.pem") |
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| 44 | maryannID.id_load_privkey_file("Maryann_private.pem"); |
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| 45 | maryann=maryannID.id_keyid() |
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| 46 | |
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| 47 | johnID=ABAC.ID("John_ID.pem") |
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| 48 | johnID.id_load_privkey_file("John_private.pem"); |
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| 49 | john=johnID.id_keyid() |
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| 50 | |
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| 51 | ################################################ |
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| 52 | #[keyid:USC].role:evaluatorOf([principal:?K]) |
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| 53 | # <-[keyid:USC].role:managerOf([principal:?K]) |
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| 54 | param=ABAC.DataTerm("principal", "K") |
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| 55 | head = ABAC.Role(usc,"evaluatorOf") |
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| 56 | head.role_add_data_term(param) |
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| 57 | param=ABAC.DataTerm("principal","K") |
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| 58 | tail = ABAC.Role(usc,"managerOf") |
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| 59 | tail.role_add_data_term(param) |
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| 60 | attr=ABAC.Attribute(head, 1800) |
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| 61 | attr.attribute_add_tail(tail) |
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| 62 | attr.attribute_bake() |
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| 63 | attr.attribute_write_cert("USC_evaluatorof_qK__USC_managerof_qK_attr.der") |
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| 64 | ctxt.load_attribute_file("USC_evaluatorof_qK__USC_managerof_qK_attr.der") |
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| 65 | print attr.string() |
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| 66 | print attr.typed_string() |
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| 67 | print "\n" |
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| 68 | |
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| 69 | ################################################# |
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| 70 | # Credential 1, double uninstantiated parameters |
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| 71 | # [keyid:USC].role:managerOf([principal:?K]) |
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| 72 | # <-[keyid:ISI].role:managerOf([principal:?K]) |
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| 73 | # |
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| 74 | param=ABAC.DataTerm("principal", "K") |
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| 75 | head = ABAC.Role(usc,"managerOf") |
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| 76 | head.role_add_data_term(param) |
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| 77 | |
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| 78 | # create variable princpal parameter |
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| 79 | param=ABAC.DataTerm("principal", "K") |
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| 80 | tail = ABAC.Role(isi,"managerOf") |
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| 81 | tail.role_add_data_term(param) |
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| 82 | attr=ABAC.Attribute(head, 1800) |
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| 83 | |
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| 84 | # compose the attribute for the policy |
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| 85 | attr.attribute_add_tail(tail) |
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| 86 | |
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| 87 | # finalize the policy |
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| 88 | attr.attribute_bake() |
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| 89 | |
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| 90 | # write the policy to a file |
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| 91 | attr.attribute_write_cert("USC_managerof_qK__USC_employee_attr.der") |
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| 92 | ctxt.load_attribute_file("USC_managerof_qK__USC_employee_attr.der") |
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| 93 | print attr.string() |
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| 94 | print attr.typed_string() |
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| 95 | print "\n" |
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| 96 | |
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| 97 | ################################################# |
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| 98 | # Credential 2 |
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| 99 | # [keyid:ISI].role:managerOf([keyid:Maryann]) |
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| 100 | # <- [keyid:John] |
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| 101 | param=ABAC.DataTerm(maryannID) |
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| 102 | head = ABAC.Role(isi,"managerOf") |
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| 103 | head.role_add_data_term(param) |
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| 104 | tail = ABAC.Role(john) |
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| 105 | attr=ABAC.Attribute(head, 1800) |
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| 106 | attr.attribute_add_tail(tail) |
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| 107 | attr.attribute_bake() |
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| 108 | attr.attribute_write_cert("ISI_manageof_Maryann__John_attr.der") |
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| 109 | ctxt.load_attribute_file("ISI_manageof_Maryann__John_attr.der") |
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| 110 | print attr.string() |
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| 111 | print attr.typed_string() |
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| 112 | print "\n" |
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| 113 | |
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| 114 | ################################################ |
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| 115 | # Credential 3 |
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| 116 | # [keyid:USC].role:employee <- [keyid:ISI].role:employee |
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| 117 | head=ABAC.Role(usc,"employee") |
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| 118 | tail = ABAC.Role(isi,"employee") |
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| 119 | attr=ABAC.Attribute(head, 1800) |
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| 120 | attr.attribute_add_tail(tail) |
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| 121 | attr.attribute_bake() |
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| 122 | attr.attribute_write_cert("USC_employee__ISI_employee_attr.der") |
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| 123 | ctxt.load_attribute(attr) |
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| 124 | print attr.string() |
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| 125 | print attr.typed_string() |
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| 126 | print "\n" |
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| 127 | |
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| 128 | |
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| 129 | ################################################# |
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| 130 | # Credential 4 |
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| 131 | # [keyid:ISI].role:employee <- [keyid:Maryann] |
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| 132 | head = ABAC.Role(isi,"employee") |
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| 133 | tail= ABAC.Role(maryann) |
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| 134 | attr=ABAC.Attribute(head, 1800) |
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| 135 | attr.attribute_add_tail(tail) |
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| 136 | attr.attribute_bake() |
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| 137 | attr.attribute_write_cert("ISI_employee__Maryann_attr.der") |
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| 138 | ctxt.load_attribute(attr) |
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| 139 | print attr.string() |
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| 140 | print attr.typed_string() |
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| 141 | print "\n" |
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| 142 | |
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| 143 | ################################################# |
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| 144 | # Credential 4 |
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| 145 | # [keyid:ISI].role:employee <- [keyid:John] |
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| 146 | head = ABAC.Role(isi,"employee") |
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| 147 | tail= ABAC.Role(john) |
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| 148 | attr=ABAC.Attribute(head, 1800) |
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| 149 | attr.attribute_add_tail(tail) |
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| 150 | attr.attribute_bake() |
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| 151 | attr.attribute_write_cert("ISI_employee__John_attr.der") |
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| 152 | ctxt.load_attribute(attr) |
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| 153 | print attr.string() |
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| 154 | print attr.typed_string() |
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| 155 | print "\n" |
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| 156 | |
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