[8bd77b5] | 1 | /** |
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| 2 | ** abac_attribute.c |
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| 3 | **/ |
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| 4 | |
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| 5 | #include <assert.h> |
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| 6 | #include <ctype.h> |
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| 7 | #include <string.h> |
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| 8 | #include <time.h> |
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| 9 | |
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[2e9455f] | 10 | #include <credentials/certificates/x509.h> |
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| 11 | #include <credentials/certificates/certificate.h> |
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| 12 | #include <credentials/certificates/ac.h> |
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[8bd77b5] | 13 | |
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[2e9455f] | 14 | #include "abac_util.h" |
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| 15 | #include "abac_aspect.h" |
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| 16 | #include "abac_m64.h" |
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| 17 | #include "abac_id.h" |
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| 18 | #include "abac_pl_yy.h" |
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| 19 | #include "rt2_yy.h" |
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| 20 | #include "abac_verifier.h" |
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| 21 | #include "abac_util_cert.h" |
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| 22 | #include "abac_id.h" |
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| 23 | |
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| 24 | /*****************************************************************/ |
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[8bd77b5] | 25 | static int debug=0; |
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| 26 | |
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[2e9455f] | 27 | /* the correct setting of using_this depends on user if the attribute is |
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| 28 | not generate from yyparse call */ |
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[8bd77b5] | 29 | struct _abac_attribute_t { |
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| 30 | abac_id_t *issuer_id; |
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| 31 | abac_aspect_t *head; |
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| 32 | abac_aspect_t *tail; |
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| 33 | int validity; |
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[2e9455f] | 34 | int using_this; /* tracking use of (?This) */ |
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[8bd77b5] | 35 | certificate_t *cert; // NULL until baked |
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| 36 | certificate_t *issuer_cert; |
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| 37 | |
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| 38 | int refcount; |
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| 39 | }; |
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| 40 | |
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[2e9455f] | 41 | /* local */ |
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| 42 | abac_attribute_t *abac_attribute_set_head(abac_attribute_t *ptr, abac_aspect_t *head); |
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| 43 | abac_aspect_t *abac_attribute_head(abac_attribute_t *ptr); |
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| 44 | abac_aspect_t *abac_attribute_tail(abac_attribute_t *ptr); |
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| 45 | abac_attribute_t *abac_attribute_add_tail(abac_attribute_t *ptr, abac_aspect_t *tail); |
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| 46 | void abac_attribute_set_using_this(abac_attribute_t *ptr, int using_this); |
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| 47 | |
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[8bd77b5] | 48 | /********************************************************************/ |
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[2e9455f] | 49 | /* currently the hashkeyid is the uuencoded 'sha attribute string' */ |
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[5d06689] | 50 | char *get_cred_encoding(abac_attribute_t *ptr) |
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[8bd77b5] | 51 | { |
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| 52 | char *encoding=NULL; |
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| 53 | |
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| 54 | /* must have a head aspect and tail aspect */ |
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| 55 | assert(ptr->head != NULL); |
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| 56 | assert(ptr->tail != NULL); |
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| 57 | |
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[2e9455f] | 58 | if(ptr->cert != NULL) { /* already a baked one */ |
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| 59 | ac_t *ac = (ac_t *)ptr->cert; |
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| 60 | ietf_attributes_t *attr_cert = ac->get_groups(ac); |
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| 61 | char *encoded_attr_string=attr_cert->get_string(attr_cert); |
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| 62 | return encoded_attr_string; |
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| 63 | } |
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| 64 | |
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| 65 | /* not a baked one should not be in ABAC_CN mode at all !!! */ |
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| 66 | /* needs to be the one with sha */ |
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| 67 | if(USE("ABAC_CN")) { |
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| 68 | fprintf(stderr,"get_cred_encoding, MIGHT be BAD..\n"); |
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| 69 | } |
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[8bd77b5] | 70 | char *head_string=abac_aspect_typed_string_with_condition(ptr->head); |
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| 71 | char *tail_string=abac_aspect_typed_string_with_condition(ptr->tail); |
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| 72 | |
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| 73 | asprintf(&encoding,"%s<-%s", head_string,tail_string); |
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| 74 | char* base64_encoding=abac_encode_string(encoding); |
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| 75 | |
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[2e9455f] | 76 | if(USE("ABAC_CN")) { |
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| 77 | fprintf(stderr," --> (%s)\n", encoding); |
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| 78 | } |
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[8bd77b5] | 79 | |
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| 80 | free(encoding); |
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| 81 | free(head_string); |
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| 82 | free(tail_string); |
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| 83 | return base64_encoding; |
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| 84 | } |
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| 85 | |
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[2e9455f] | 86 | static abac_attribute_t *_abac_attribute_init() |
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[8bd77b5] | 87 | { |
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| 88 | abac_attribute_t *ptr = abac_xmalloc(sizeof(abac_attribute_t)); |
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[2e9455f] | 89 | ptr->issuer_id = NULL; |
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[8bd77b5] | 90 | ptr->head = NULL; |
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| 91 | ptr->tail = NULL; |
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| 92 | ptr->validity= 365 * 86400; // default |
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[2e9455f] | 93 | // NULL until baked |
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| 94 | ptr->using_this=0; |
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| 95 | ptr->cert= NULL; |
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| 96 | ptr->issuer_cert= NULL; |
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| 97 | ptr->refcount=1; |
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| 98 | return ptr; |
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| 99 | } |
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| 100 | |
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| 101 | /********************************************************************/ |
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| 102 | abac_attribute_t *abac_attribute_new(abac_id_t *issuer, certificate_t *cert, |
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| 103 | certificate_t *issuer_cert) |
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| 104 | { |
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| 105 | abac_attribute_t *ptr = _abac_attribute_init(); |
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| 106 | ptr->issuer_id = abac_id_dup(issuer); |
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[8bd77b5] | 107 | ptr->cert=cert; // already baked.. |
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| 108 | ptr->issuer_cert=issuer_cert; |
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| 109 | ptr->refcount=1; |
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| 110 | return ptr; |
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| 111 | } |
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| 112 | |
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| 113 | // validity is measured in seconds (as of 0.2.0) |
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[2e9455f] | 114 | // remember using_this, |
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| 115 | int abac_attribute_create(abac_attribute_t **ret, abac_aspect_t *head, |
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| 116 | abac_aspect_t *tail, int validity) |
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[8bd77b5] | 117 | { |
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| 118 | abac_id_t *issuer_id=abac_aspect_get_issuer_id(head); |
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[ba6027a] | 119 | if(debug) |
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| 120 | print_abac_key("abac_attribute_create" , abac_id_keyptr(issuer_id)); |
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| 121 | |
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[8bd77b5] | 122 | char *name=abac_aspect_aspect_name(head); |
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| 123 | |
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[ba6027a] | 124 | if (!abac_id_has_privkey(issuer_id)) |
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[8bd77b5] | 125 | return ABAC_ATTRIBUTE_ISSUER_NOKEY; |
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| 126 | if (!abac_validate_clean_aspect_name(name)) |
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| 127 | return ABAC_ATTRIBUTE_INVALID_ROLE; |
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| 128 | if (validity < 0) |
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| 129 | return ABAC_ATTRIBUTE_INVALID_VALIDITY; |
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| 130 | |
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[2e9455f] | 131 | abac_attribute_t *ptr = _abac_attribute_init(); |
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[8bd77b5] | 132 | ptr->issuer_id = abac_id_dup(issuer_id); |
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| 133 | ptr->head = abac_aspect_dup(head); |
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[2e9455f] | 134 | if(tail) |
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| 135 | ptr->tail = abac_aspect_dup(tail); |
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[8bd77b5] | 136 | ptr->validity=(validity==0?(365 * 86400):validity); |
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| 137 | |
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| 138 | *ret = ptr; |
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| 139 | return ABAC_ATTRIBUTE_SUCCESS; |
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| 140 | } |
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| 141 | |
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| 142 | // validity is measured in seconds (as of 0.2.0) |
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| 143 | int abac_attribute_create_creddy(abac_attribute_t **ret, abac_id_t *issuer, |
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[2e9455f] | 144 | abac_aspect_t *head_aspect, abac_aspect_t *tail_aspect, char *name, |
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| 145 | int validity) |
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[8bd77b5] | 146 | { |
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[ba6027a] | 147 | if (!abac_id_has_privkey(issuer)) |
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[8bd77b5] | 148 | return ABAC_ATTRIBUTE_ISSUER_NOKEY; |
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| 149 | if (!abac_validate_clean_aspect_name(name)) |
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| 150 | return ABAC_ATTRIBUTE_INVALID_ROLE; |
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| 151 | if (validity < 0) |
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| 152 | return ABAC_ATTRIBUTE_INVALID_VALIDITY; |
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| 153 | |
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[2e9455f] | 154 | abac_attribute_t *ptr = _abac_attribute_init(); |
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[8bd77b5] | 155 | ptr->issuer_id = abac_id_dup(issuer); |
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| 156 | ptr->head=head_aspect; |
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| 157 | ptr->tail=tail_aspect; |
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| 158 | ptr->validity = validity; |
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| 159 | |
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| 160 | *ret = ptr; |
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| 161 | return ABAC_ATTRIBUTE_SUCCESS; |
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| 162 | } |
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| 163 | |
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[2e9455f] | 164 | static void _check_cert_group(certificate_t *cert, char *estring) |
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| 165 | { |
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| 166 | ietf_attributes_t *attr_cert = NULL; |
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| 167 | int ret, i; |
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| 168 | |
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| 169 | // get the attr |
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| 170 | ac_t *ac = (ac_t *)cert; |
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| 171 | attr_cert = ac->get_groups(ac); |
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| 172 | if(attr_cert == NULL) { |
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| 173 | fprintf(stderr,"BAD group from the cert !!!\n"); |
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| 174 | return; |
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| 175 | } |
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| 176 | char *encoded_attr_string=attr_cert->get_string(attr_cert); |
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| 177 | if(encoded_attr_string==NULL) { |
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| 178 | fprintf(stderr,"BAD empty, encoded attr string from the cert !!!\n"); |
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| 179 | /* |
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| 180 | chunk_t b64 = chunk_to_base64(chunk, NULL); |
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| 181 | chunk_t chk = chunk_from_base64(base64, NULL); |
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| 182 | */ |
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| 183 | int len = strlen(estring); |
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| 184 | chunk_t b64 = { estring, len }; |
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| 185 | chunk_t chk= chunk_from_base64(b64, NULL); |
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| 186 | chk.ptr[chk.len]='\0'; |
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| 187 | fprintf(stderr,"new convert: (%s)\n", chk.ptr); |
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| 188 | chunk_t nb64 = chunk_to_base64(chk, NULL); |
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| 189 | fprintf(stderr,"back again: (%d)(%s)\n", strlen(nb64.ptr), nb64.ptr); |
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| 190 | } |
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| 191 | } |
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| 192 | |
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[8bd77b5] | 193 | int abac_attribute_bake(abac_attribute_t *ptr) { |
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| 194 | assert(ptr); |
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| 195 | |
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[5d06689] | 196 | char *cred_encoding = get_cred_encoding(ptr); |
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[8bd77b5] | 197 | |
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| 198 | // create attribute cert |
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| 199 | time_t not_before = time(NULL); |
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| 200 | time_t not_after = not_before + ptr->validity; |
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| 201 | chunk_t serial = abac_generate_serial(); |
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| 202 | |
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[ba6027a] | 203 | private_key_t *private = abac_id_privkey(ptr->issuer_id); |
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| 204 | |
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| 205 | if(private==NULL) |
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| 206 | errx(1,"can not bake without a private key!!!"); |
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| 207 | |
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[2e9455f] | 208 | /**** XXX this needs to be removed !!!!! limitation from strongswan... ****/ |
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| 209 | if(strlen(cred_encoding) > 512) { |
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| 210 | fprintf(stderr,"due to BUILD_IETF_GROUP_ATTR buffer size limit, can not bake this attribute (%d)!!\n", strlen(cred_encoding)); |
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| 211 | return 0; |
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| 212 | } |
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| 213 | |
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[8bd77b5] | 214 | certificate_t *attr_cert = lib->creds->create(lib->creds, |
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| 215 | CRED_CERTIFICATE, CERT_X509_AC, |
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| 216 | BUILD_CERT, abac_id_cert(ptr->issuer_id), |
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| 217 | BUILD_NOT_BEFORE_TIME, not_before, |
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| 218 | BUILD_NOT_AFTER_TIME, not_after, |
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| 219 | BUILD_SERIAL, serial, |
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| 220 | BUILD_IETF_GROUP_ATTR, cred_encoding, |
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| 221 | BUILD_SIGNING_CERT, abac_id_cert(ptr->issuer_id), |
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[ba6027a] | 222 | BUILD_SIGNING_KEY, private, |
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[8bd77b5] | 223 | BUILD_END |
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| 224 | ); |
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[d037f54] | 225 | |
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[2e9455f] | 226 | _check_cert_group(attr_cert, cred_encoding); |
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| 227 | |
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[ba6027a] | 228 | DESTROY_IF(private); |
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| 229 | |
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[8bd77b5] | 230 | if (attr_cert == NULL) |
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| 231 | return 0; |
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| 232 | |
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| 233 | ptr->cert = attr_cert; |
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[137b55f] | 234 | // cert and issuer can be the same, in which case it is the self signing |
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[8bd77b5] | 235 | ptr->issuer_cert= attr_cert->get_ref(attr_cert); |
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| 236 | |
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| 237 | free(cred_encoding); |
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| 238 | free(serial.ptr); |
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| 239 | return 1; |
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| 240 | } |
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| 241 | |
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| 242 | abac_chunk_t abac_attribute_cert_chunk(abac_attribute_t *ptr) { |
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| 243 | assert(ptr->cert); |
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[137b55f] | 244 | chunk_t encoding = chunk_empty; |
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| 245 | int rc=ptr->cert->get_encoding(ptr->cert,CERT_ASN1_DER,&encoding); |
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[8bd77b5] | 246 | abac_chunk_t ret = { encoding.ptr, encoding.len }; |
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| 247 | return ret; |
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| 248 | } |
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| 249 | |
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[2efdff5] | 250 | /* just loading it without any verifying */ |
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[dfe6b61] | 251 | certificate_t *abac_attribute_cert_from_file(char *filename) { |
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[2efdff5] | 252 | |
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| 253 | if(!file_exist(filename)) return NULL; |
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| 254 | |
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| 255 | libabac_init(); |
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[2e9455f] | 256 | |
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| 257 | certificate_t *cert = cert_get_attr_cert_from_file(filename); |
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[2efdff5] | 258 | if (cert == NULL) |
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| 259 | errx(1, "Couldn't load attribute cert %s", filename); |
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| 260 | |
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| 261 | return cert; |
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| 262 | } |
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| 263 | |
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| 264 | |
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[dfe6b61] | 265 | certificate_t *abac_attribute_cert_from_chunk(abac_chunk_t achunk) { |
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| 266 | |
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| 267 | chunk_t chunk = { .ptr = achunk.ptr, .len = achunk.len }; |
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| 268 | if(achunk.len == 0) { |
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| 269 | errx(1, "Couldn't load attribute chunk, size of 0"); |
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| 270 | } |
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| 271 | |
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| 272 | libabac_init(); |
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[2e9455f] | 273 | certificate_t *cert = cert_get_attr_cert_from_chunk(chunk); |
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[dfe6b61] | 274 | if (cert == NULL) |
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| 275 | errx(1, "Couldn't load attribute chunk"); |
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| 276 | |
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| 277 | return cert; |
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| 278 | } |
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| 279 | |
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| 280 | |
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| 281 | /** |
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| 282 | * Load an attribute cert with a cert. |
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| 283 | * Returns true only if the certificate is valid and is issued by the proper |
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| 284 | * authority. |
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| 285 | * attribute string is parsed via yyparse call |
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| 286 | */ |
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[2e9455f] | 287 | static abac_attribute_t *_load_attribute_from_cert(certificate_t *cert) |
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| 288 | { |
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[dfe6b61] | 289 | ietf_attributes_t *attr_cert = NULL; |
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| 290 | int ret, i; |
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[2e9455f] | 291 | int using_this=0; |
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[dfe6b61] | 292 | |
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| 293 | // get the attr |
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| 294 | ac_t *ac = (ac_t *)cert; |
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| 295 | attr_cert = ac->get_groups(ac); |
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| 296 | if (attr_cert == NULL) { |
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| 297 | ret = ABAC_CERT_INVALID; |
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| 298 | goto error; |
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| 299 | } |
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| 300 | |
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| 301 | char *encoded_attr_string=attr_cert->get_string(attr_cert); |
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| 302 | char *attr_string = abac_decode_string(encoded_attr_string); |
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| 303 | if(debug) |
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| 304 | fprintf(stderr, "string to be yyparse..(%d)(%s)\n",strlen(attr_string),attr_string); |
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| 305 | |
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| 306 | if (attr_string == NULL) { |
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| 307 | ret = ABAC_CERT_INVALID; |
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| 308 | goto error; |
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| 309 | } |
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| 310 | |
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[2e9455f] | 311 | abac_id_credential_t *id_cred; |
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| 312 | abac_id_t *issuer_id; |
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| 313 | |
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| 314 | /* reset lex input line, call into yacc parser */ |
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| 315 | abac_aspect_t *head_aspect = NULL; |
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| 316 | abac_aspect_t *tail_aspect = NULL; |
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| 317 | int rc=abac_yy_parse(NULL, attr_string, &head_aspect, &tail_aspect, &using_this); |
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[dfe6b61] | 318 | if (rc) { |
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| 319 | ret = ABAC_CERT_INVALID; |
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| 320 | goto error; |
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| 321 | } |
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| 322 | |
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| 323 | // get the issuer based on keyid |
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| 324 | char *principalname = abac_aspect_principal_principalname(head_aspect); |
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| 325 | if(debug) fprintf(stderr, "LOOKING for %s\n", principalname); |
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| 326 | |
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| 327 | id_cred = abac_id_credential_lookup(principalname); |
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| 328 | if(id_cred == NULL) { |
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| 329 | ret = ABAC_CERT_MISSING_ISSUER; |
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| 330 | if(debug) |
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| 331 | fprintf(stderr, "can not find %s in id_creds\n", principalname); |
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| 332 | goto error; |
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| 333 | } |
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| 334 | |
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| 335 | issuer_id=abac_id_credential_id(id_cred); |
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| 336 | if (issuer_id == NULL) { |
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| 337 | ret = ABAC_CERT_MISSING_ISSUER; |
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| 338 | if(debug) |
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| 339 | fprintf(stderr, "can not find %s in id_creds\n", principalname); |
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| 340 | goto error; |
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| 341 | } |
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| 342 | // make sure the issuer's signed it |
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| 343 | ret = verify_signature(abac_id_cert(issuer_id), cert); |
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| 344 | if (!ret) { |
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| 345 | abac_yy_set_error_code(ABAC_RT_CERT_BAD_SIG); |
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| 346 | ret=ABAC_CERT_BAD_SIG; |
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| 347 | goto error; |
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| 348 | } |
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| 349 | |
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| 350 | // at this point we know we have a good attribute cert baked it in |
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| 351 | abac_attribute_t *attr=abac_attribute_new(issuer_id, cert, cert->get_ref(cert)); |
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| 352 | abac_attribute_set_head(attr, head_aspect); |
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| 353 | abac_attribute_add_tail(attr, tail_aspect); |
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[2e9455f] | 354 | abac_attribute_set_using_this(attr, using_this); |
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[dfe6b61] | 355 | |
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| 356 | // free up some stuff |
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| 357 | attr_cert->destroy(attr_cert); |
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| 358 | |
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| 359 | return attr; |
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| 360 | |
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| 361 | error: |
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| 362 | if (cert) cert->destroy(cert); |
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| 363 | errx(1, "fail to extract attribute from a cert properly\n"); |
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| 364 | } |
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| 365 | |
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| 366 | abac_attribute_t *abac_attribute_from_chunk(abac_chunk_t achunk) |
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| 367 | { |
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| 368 | certificate_t *cert=abac_attribute_cert_from_chunk(achunk); |
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| 369 | abac_attribute_t *ret=_load_attribute_from_cert(cert); |
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| 370 | return ret; |
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| 371 | } |
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| 372 | |
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| 373 | // returns 0 if the cert hasn't been baked |
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[8bd77b5] | 374 | int abac_attribute_baked(abac_attribute_t *ptr) { |
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| 375 | return ptr->cert != NULL; |
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| 376 | } |
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| 377 | |
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[5d06689] | 378 | int abac_attribute_write_cert(abac_attribute_t *ptr, FILE *out) { |
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[8bd77b5] | 379 | assert(ptr != NULL); |
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| 380 | |
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| 381 | if (ptr->cert == NULL) |
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| 382 | return 0; |
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| 383 | |
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| 384 | // write to file |
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[137b55f] | 385 | chunk_t encoding = chunk_empty; |
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| 386 | int rc=ptr->cert->get_encoding(ptr->cert,CERT_ASN1_DER,&encoding); |
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| 387 | |
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| 388 | if(rc) { |
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| 389 | fwrite(encoding.ptr, encoding.len, 1, out); |
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| 390 | free(encoding.ptr); |
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| 391 | return 1; |
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| 392 | } |
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| 393 | return 0; |
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[8bd77b5] | 394 | } |
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| 395 | |
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| 396 | abac_attribute_t *abac_attribute_dup(abac_attribute_t *ptr) |
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| 397 | { |
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| 398 | assert(ptr); |
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[2e9455f] | 399 | abac_id_dup(ptr->issuer_id); |
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[8bd77b5] | 400 | ++ptr->refcount; |
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| 401 | return ptr; |
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| 402 | } |
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| 403 | |
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[2e9455f] | 404 | static certificate_t *_cert_copy(certificate_t *cert) |
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| 405 | { |
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| 406 | if(cert==NULL) return NULL; |
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| 407 | chunk_t encoding = chunk_empty; |
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| 408 | int rc=cert->get_encoding(cert,CERT_ASN1_DER,&encoding); |
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| 409 | certificate_t *ncert = cert_get_attr_cert_from_chunk(encoding); |
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| 410 | return ncert; |
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| 411 | } |
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| 412 | |
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| 413 | /* deep copy of a attribute structure, this is used by libabac |
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| 414 | api so that we can have a local control of the data within |
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| 415 | libabac |
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| 416 | */ |
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| 417 | abac_attribute_t *abac_attribute_copy(abac_attribute_t *ptr) |
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| 418 | { |
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| 419 | assert(ptr); |
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| 420 | abac_aspect_t *tmp; |
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| 421 | abac_attribute_t *nptr = _abac_attribute_init(); |
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| 422 | nptr->issuer_id = abac_id_copy(ptr->issuer_id); |
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| 423 | nptr->head=abac_aspect_copy(abac_attribute_head(ptr)); |
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| 424 | nptr->tail=abac_aspect_copy(abac_attribute_tail(ptr)); |
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| 425 | |
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| 426 | nptr->validity= ptr->validity; |
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| 427 | nptr->using_this = ptr->using_this; |
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| 428 | certificate_t *attr_cert=_cert_copy(ptr->cert); |
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| 429 | nptr->cert=attr_cert; // already baked.. |
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| 430 | if(attr_cert) |
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| 431 | nptr->issuer_cert= attr_cert->get_ref(attr_cert); |
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| 432 | nptr->refcount=ptr->refcount+1; |
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| 433 | return nptr; |
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| 434 | } |
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| 435 | |
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[8bd77b5] | 436 | void abac_attribute_free(abac_attribute_t *ptr) { |
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| 437 | int i; |
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| 438 | |
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| 439 | if (ptr == NULL) |
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| 440 | return; |
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| 441 | |
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| 442 | --ptr->refcount; |
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| 443 | if (ptr->refcount > 0) |
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| 444 | return; |
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| 445 | |
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| 446 | if(ptr->issuer_id) abac_id_free(ptr->issuer_id); |
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| 447 | if(ptr->head) abac_aspect_free(ptr->head); |
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| 448 | if(ptr->tail) abac_aspect_free(ptr->tail); |
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| 449 | |
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| 450 | if(ptr->cert) DESTROY_IF(ptr->cert); |
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| 451 | if(ptr->issuer_cert) DESTROY_IF(ptr->issuer_cert); |
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| 452 | free(ptr); |
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| 453 | } |
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| 454 | |
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[5d06689] | 455 | |
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| 456 | char *abac_attribute_string(abac_attribute_t *ptr) |
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| 457 | { |
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| 458 | char *head=abac_aspect_string_with_condition(ptr->head); |
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| 459 | char *tail=abac_aspect_string_with_condition(ptr->tail); |
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| 460 | if(head==NULL || tail==NULL) |
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[2efdff5] | 461 | errx(1, "attribute string, head and tail can not be NULL"); |
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[5d06689] | 462 | char *tmp=NULL; |
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| 463 | asprintf(&tmp,"%s<-%s",head,tail); |
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| 464 | return tmp; |
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| 465 | } |
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| 466 | char *abac_attribute_typed_string(abac_attribute_t *ptr) |
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| 467 | { |
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| 468 | char *head=abac_aspect_typed_string_with_condition(ptr->head); |
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| 469 | char *tail=abac_aspect_typed_string_with_condition(ptr->tail); |
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| 470 | if(head==NULL || tail==NULL) |
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[2efdff5] | 471 | errx(1, "attribute typed string, head and tail can not be NULL"); |
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[5d06689] | 472 | char *tmp=NULL; |
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| 473 | asprintf(&tmp,"%s<-%s",head,tail); |
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| 474 | return tmp; |
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| 475 | } |
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| 476 | |
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[8bd77b5] | 477 | /********************************************************************/ |
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| 478 | certificate_t *abac_attribute_issuer_cert(abac_attribute_t *ptr) |
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| 479 | { |
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| 480 | assert(ptr); |
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| 481 | return ptr->issuer_cert; |
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| 482 | } |
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| 483 | |
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| 484 | abac_aspect_t *abac_attribute_head(abac_attribute_t *ptr) |
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| 485 | { |
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| 486 | assert(ptr); |
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| 487 | return ptr->head; |
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| 488 | } |
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| 489 | |
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[2a73357] | 490 | int abac_attribute_is_role(abac_attribute_t *ptr) |
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[adc0815] | 491 | { |
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| 492 | assert(ptr); |
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| 493 | assert(ptr->head); |
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| 494 | return abac_aspect_is_role(ptr->head); |
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| 495 | } |
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| 496 | |
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[8bd77b5] | 497 | abac_attribute_t *abac_attribute_set_head(abac_attribute_t *ptr, abac_aspect_t *head) |
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| 498 | { |
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| 499 | assert(ptr); |
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| 500 | ptr->head=head; |
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| 501 | return ptr; |
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| 502 | } |
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| 503 | |
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[2e9455f] | 504 | void abac_attribute_set_using_this(abac_attribute_t *ptr, int using_this) |
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| 505 | { |
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| 506 | assert(ptr); |
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| 507 | ptr->using_this=using_this; |
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| 508 | } |
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| 509 | |
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| 510 | int abac_attribute_get_this(abac_attribute_t *ptr) |
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| 511 | { |
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| 512 | assert(ptr); |
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| 513 | return ptr->using_this; |
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| 514 | } |
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| 515 | |
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[8bd77b5] | 516 | abac_aspect_t *abac_attribute_tail(abac_attribute_t *ptr) |
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| 517 | { |
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| 518 | assert(ptr); |
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| 519 | return ptr->tail; |
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| 520 | } |
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| 521 | |
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| 522 | abac_attribute_t *abac_attribute_add_tail(abac_attribute_t *ptr, abac_aspect_t *tail) |
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| 523 | { |
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| 524 | assert(ptr); |
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| 525 | assert(tail); |
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| 526 | |
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| 527 | /* type of head and tail has to match */ |
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| 528 | abac_aspect_t *head=abac_attribute_head(ptr); |
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[2a73357] | 529 | |
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[6244e28] | 530 | if(debug) { |
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| 531 | fprintf(stderr, "head->(%s)\n",abac_aspect_type_string(head)); |
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| 532 | fprintf(stderr, "tail->(%s)\n",abac_aspect_type_string(tail)); |
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| 533 | } |
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[8bd77b5] | 534 | if(abac_aspect_is_intersecting(tail)) { |
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| 535 | if(debug) { |
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[b92a620] | 536 | fprintf(stderr, "tail is intersection \n"); |
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| 537 | fprintf(stderr, "tail is (%s)\n", abac_aspect_string_with_condition(tail)); |
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[8bd77b5] | 538 | } |
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| 539 | if(abac_aspect_intersecting_aspect_type(tail) != abac_aspect_aspect_type(head)) |
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[6244e28] | 540 | errx(1, "head and intersecting tail's aspect type does not match"); |
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[8bd77b5] | 541 | } else { |
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| 542 | if(abac_aspect_aspect_type(head) != abac_aspect_aspect_type(tail)) { |
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[6244e28] | 543 | if(debug) |
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[b92a620] | 544 | fprintf(stderr, "tail is (%s)\n", abac_aspect_string_with_condition(tail)); |
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[8bd77b5] | 545 | errx(1, "head and tail's aspect type does not match"); |
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| 546 | } |
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| 547 | } |
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| 548 | |
---|
| 549 | if(ptr->tail == NULL) { |
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| 550 | ptr->tail=abac_aspect_dup(tail); |
---|
| 551 | } else { |
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| 552 | if(abac_aspect_is_intersecting(ptr->tail)) { |
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| 553 | abac_aspect_add_intersecting_aspect(ptr->tail, tail); |
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| 554 | } else { |
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| 555 | /* special case.. if there is a tail there already and it is not an intersecting |
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| 556 | tail, need to turn this into an intersecting tails */ |
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| 557 | abac_aspect_t *nptr=abac_aspect_intersection_new(ptr->tail); |
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| 558 | abac_aspect_add_intersecting_aspect(nptr, tail); |
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| 559 | ptr->tail=nptr; |
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| 560 | } |
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| 561 | } |
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| 562 | return ptr; |
---|
| 563 | } |
---|
| 564 | |
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| 565 | certificate_t *abac_attribute_cert(abac_attribute_t *ptr) |
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| 566 | { |
---|
| 567 | assert(ptr); |
---|
| 568 | return ptr->cert; |
---|
| 569 | } |
---|
| 570 | |
---|
| 571 | int abac_attribute_lastone(abac_attribute_t *ptr) |
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| 572 | { |
---|
| 573 | assert(ptr); |
---|
| 574 | if(ptr->refcount == 1) |
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| 575 | return 1; |
---|
| 576 | return 0; |
---|
| 577 | } |
---|
| 578 | |
---|
| 579 | |
---|
| 580 | abac_aspect_t **abac_attribute_tail_vectorized(abac_attribute_t *ptr) |
---|
| 581 | { |
---|
| 582 | abac_aspect_t **tails=NULL; |
---|
| 583 | abac_aspect_t *tail=ptr->tail; |
---|
| 584 | abac_list_t *list=NULL; |
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| 585 | int cnt=0; |
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| 586 | if(tail != NULL) { |
---|
| 587 | if(!abac_aspect_is_intersecting(tail)) { |
---|
| 588 | tails = abac_xmalloc(sizeof(abac_aspect_t *) * 2); |
---|
| 589 | tails[0] = abac_aspect_dup(tail); |
---|
| 590 | tails[1] = NULL; |
---|
| 591 | if(debug) { |
---|
[b92a620] | 592 | fprintf(stderr, "abac_attribute_tail_vectorized, only 1 tail\n"); |
---|
[8bd77b5] | 593 | } |
---|
| 594 | return tails; |
---|
| 595 | } else { |
---|
| 596 | abac_list_t *list=abac_aspect_prereqs(tail); |
---|
| 597 | cnt=abac_list_size(list); |
---|
| 598 | } |
---|
| 599 | } |
---|
| 600 | // make the array (leave space to NULL terminate it) |
---|
| 601 | // n.b., even if the list is empty, we still return an array that |
---|
| 602 | // only contains the NULL terminator |
---|
| 603 | tails = abac_xmalloc(sizeof(abac_aspect_t *) * (cnt + 1)); |
---|
| 604 | abac_aspect_t *cur; |
---|
| 605 | int i = 0; |
---|
| 606 | if(i<cnt) { |
---|
| 607 | abac_list_foreach(list, cur, |
---|
| 608 | tails[i++] = abac_aspect_dup(cur); |
---|
| 609 | ); |
---|
| 610 | } |
---|
| 611 | tails[i] = NULL; |
---|
| 612 | if(debug) |
---|
[b92a620] | 613 | fprintf(stderr, "abac_attribute_tail_vectorized, %d tails\n", cnt); |
---|
[8bd77b5] | 614 | return tails; |
---|
| 615 | } |
---|
| 616 | |
---|
| 617 | void abac_aspects_free(abac_aspect_t **aspects) |
---|
| 618 | { |
---|
| 619 | /* always null terminating */ |
---|
| 620 | assert(aspects); |
---|
| 621 | int i; |
---|
| 622 | for (i = 0; aspects[i] != NULL; ++i) { |
---|
| 623 | abac_aspect_free(aspects[i]); |
---|
| 624 | } |
---|
| 625 | free(aspects); |
---|
| 626 | } |
---|