[8bd77b5] | 1 | /** |
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| 2 | ** abac_verifier.c |
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| 3 | **/ |
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[53e540d] | 4 | |
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| 5 | // include the GNU extension of asprintf |
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| 6 | #define _GNU_SOURCE |
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| 7 | |
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[5110d42] | 8 | #include <stdio.h> |
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| 9 | #include <regex.h> |
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| 10 | #include <sys/mman.h> |
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| 11 | #include <fcntl.h> |
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[d037f54] | 12 | #include <sys/types.h> |
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| 13 | #include <sys/stat.h> |
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| 14 | #include <unistd.h> |
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| 15 | |
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[5110d42] | 16 | |
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[186cb75] | 17 | #include <assert.h> |
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[202a7f9] | 18 | #include <stdio.h> |
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[186cb75] | 19 | |
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[5450aeb] | 20 | #include <library.h> |
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| 21 | |
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[8bd77b5] | 22 | #include "abac_internal.h" |
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[43e3b71] | 23 | #include "abac_verifier.h" |
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[5450aeb] | 24 | |
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[3c251d0] | 25 | #include "abac_util.h" |
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[202a7f9] | 26 | #include "abac_rt.h" |
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[5450aeb] | 27 | |
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[8bd77b5] | 28 | static int debug=0; |
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[ba6027a] | 29 | |
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[5d06689] | 30 | /* from abac_attribute.c */ |
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| 31 | extern char *get_cred_encoding(abac_attribute_t *ptr); |
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[8bd77b5] | 32 | |
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| 33 | extern abac_aspect_t *abac_yy_get_rule_head_aspect(); |
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| 34 | extern abac_aspect_t *abac_yy_get_rule_tail_aspect(); |
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[b5a3da4] | 35 | extern abac_list_t *abac_yy_get_rule_clauses(); |
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[da5afdf] | 36 | extern char* abac_decode_string(char *); |
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[b5a3da4] | 37 | extern void abac_yy_free_rule_clauses(); |
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[0d0c3a9] | 38 | extern char *generate_pl_type_clause(char *, int); |
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[5d06689] | 39 | extern abac_list_t *generate_pl_clauses(abac_aspect_t *, abac_aspect_t *); |
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[9b43fc3] | 40 | extern void generate_pl_set_abac_yyfptr_encoded(char *string); |
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[0d0c3a9] | 41 | |
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[8bd77b5] | 42 | extern void abac_print_aspect_string_with_condition(abac_aspect_t *role, FILE*); |
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[202a7f9] | 43 | |
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[ba6027a] | 44 | extern int abac_id_load_privkey_chunk(abac_id_t *ptr, chunk_t keychunk); |
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| 45 | |
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[8bd77b5] | 46 | struct _abac_id_credential_t { |
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| 47 | char *hashkeyid; |
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| 48 | abac_id_t *id; |
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| 49 | char *pl_clause; |
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[5450aeb] | 50 | |
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| 51 | UT_hash_handle hh; |
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[202a7f9] | 52 | }; |
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[8bd77b5] | 53 | /* hash table base on sha with a p */ |
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| 54 | abac_id_credential_t *id_creds = NULL; |
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[5110d42] | 55 | /* linked list of all the ids's hashkeyid */ |
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| 56 | abac_list_t *id_hashkeyid_list = NULL; |
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[5450aeb] | 57 | |
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[da5afdf] | 58 | /* can store either role or oset */ |
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[401a054] | 59 | struct _abac_credential_t { |
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[8bd77b5] | 60 | char *hashkeyid; |
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| 61 | abac_attribute_t *attr; |
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| 62 | abac_list_t *pl_clauses; |
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[53e540d] | 63 | |
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| 64 | UT_hash_handle hh; |
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[8bd77b5] | 65 | }; |
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| 66 | /* hash table base on encoded attr rule */ |
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| 67 | abac_credential_t *attr_creds = NULL; |
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| 68 | /* linked list of all the attr's hashkeyid */ |
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| 69 | abac_list_t *attr_hashkeyid_list = NULL; |
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[202a7f9] | 70 | |
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[8bd77b5] | 71 | /*****************************************************************************/ |
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[da5afdf] | 72 | void abac_print_cred_info(abac_credential_t *cred, FILE *fp) |
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[202a7f9] | 73 | { |
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[da5afdf] | 74 | if(fp == NULL) |
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| 75 | fp=stdout; |
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| 76 | |
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[8bd77b5] | 77 | abac_attribute_t *ptr=cred->attr; |
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| 78 | abac_aspect_t *head=abac_attribute_head(ptr); |
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| 79 | abac_aspect_t *tail=abac_attribute_tail(ptr); |
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| 80 | |
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[202a7f9] | 81 | if(debug) { |
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[da5afdf] | 82 | fprintf(fp,"---> printing out credential info cred(%d)..\n", (int) cred); |
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[8bd77b5] | 83 | if(head) { |
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| 84 | abac_print_aspect_string_with_condition(head,fp); |
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[202a7f9] | 85 | } |
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[8bd77b5] | 86 | if(tail) { |
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| 87 | abac_print_aspect_string_with_condition(tail,fp); |
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[202a7f9] | 88 | } |
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| 89 | |
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[8bd77b5] | 90 | abac_list_t *clauses=cred->pl_clauses; |
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[202a7f9] | 91 | if (clauses != NULL) { |
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| 92 | char *cur=NULL; |
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| 93 | abac_list_foreach(clauses, cur, |
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[da5afdf] | 94 | fprintf(fp,"\n a clause(%d):\n",(int)cur); |
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[202a7f9] | 95 | if(cur) |
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[da5afdf] | 96 | fprintf(fp,"strlen(%d)loc(%d)(%s)\n", strlen(cur),(int)cur, cur); |
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[202a7f9] | 97 | ); |
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| 98 | } |
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| 99 | } else { |
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[da5afdf] | 100 | fprintf(fp," "); |
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[8bd77b5] | 101 | abac_print_aspect_string_with_condition(head,fp); |
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[da5afdf] | 102 | fprintf(fp," <- "); |
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[8bd77b5] | 103 | abac_print_aspect_string_with_condition(tail,fp); |
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[da5afdf] | 104 | fprintf(fp,"\n"); |
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[202a7f9] | 105 | } |
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| 106 | } |
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| 107 | |
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[5110d42] | 108 | void abac_print_prin_info(abac_id_credential_t *prin, FILE *fp) |
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| 109 | { |
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| 110 | if(fp == NULL) |
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| 111 | return; |
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| 112 | |
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| 113 | abac_id_t *ptr=abac_id_credential_id(prin); |
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| 114 | |
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| 115 | if(debug) fprintf(fp,"---> printing out principal info ..\n"); |
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| 116 | if(abac_id_has_privkey(ptr)) |
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| 117 | fprintf(fp," (%s,%s,y)\n",abac_id_name(ptr),abac_id_idtype_string(ptr)); |
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| 118 | else |
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| 119 | fprintf(fp," (%s,%s,n)\n",abac_id_name(ptr),abac_id_idtype_string(ptr)); |
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| 120 | } |
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| 121 | |
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[202a7f9] | 122 | // |
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[8bd77b5] | 123 | int abac_verify_idtype_type(char *type) { |
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[202a7f9] | 124 | int i; |
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| 125 | |
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| 126 | if (type == NULL) |
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| 127 | return 0; |
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| 128 | |
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[8bd77b5] | 129 | for (i = 1; i <= _idtypename_cnt ; i++) |
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| 130 | if(strcmp(type,_idtypename[i])==0) |
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[202a7f9] | 131 | return i; |
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| 132 | return 0; |
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| 133 | } |
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| 134 | |
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[8bd77b5] | 135 | char *abac_idtype_string(int i) |
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[202a7f9] | 136 | { |
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[440ba20] | 137 | if(i > _idtypename_cnt) { |
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| 138 | printf("bad idtypename idx %d\n", i); |
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[8bd77b5] | 139 | panic("abac_idtype_string: went out of range on idtypename"); |
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[440ba20] | 140 | } |
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| 141 | return (char*) _idtypename[i]; |
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[202a7f9] | 142 | } |
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| 143 | |
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[5450aeb] | 144 | // convert a chunk to a lowercase binary string |
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| 145 | // malloc's the string |
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| 146 | static char *_chunk_to_string(chunk_t chunk) { |
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| 147 | int i; |
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| 148 | |
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[3c251d0] | 149 | char *ret = abac_xmalloc(chunk.len * 2 + 1); |
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[5450aeb] | 150 | |
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| 151 | for (i = 0; i < chunk.len; ++i) |
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| 152 | sprintf(ret + 2 * i, "%02x", chunk.ptr[i]); |
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| 153 | |
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| 154 | return ret; |
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| 155 | } |
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| 156 | |
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| 157 | // verify that cert was issued by issuer |
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| 158 | // cert and issuer can be the same, in which case the self-sig is validated |
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[dfe6b61] | 159 | int verify_signature(certificate_t *issuer_cert, certificate_t *cert) { |
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[8bd77b5] | 160 | if (cert->issued_by(cert, issuer_cert)) |
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[5450aeb] | 161 | if (cert->get_validity(cert, NULL, NULL, NULL)) |
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| 162 | return 1; |
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| 163 | return 0; |
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| 164 | } |
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| 165 | |
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[cfa7b6e] | 166 | // verify that cert is still valid |
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| 167 | static int _verify_validity(certificate_t *cert) { |
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| 168 | if (cert->get_validity(cert, NULL, NULL, NULL)) |
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| 169 | return 1; |
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| 170 | return 0; |
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| 171 | } |
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| 172 | |
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[5450aeb] | 173 | /** |
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| 174 | * Init the verifier subsystem. |
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| 175 | */ |
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[43e3b71] | 176 | void abac_verifier_init(void) { |
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[1324a63] | 177 | // silence all debugging |
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| 178 | |
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[5450aeb] | 179 | if (!library_init(NULL)) |
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| 180 | exit(SS_RC_LIBSTRONGSWAN_INTEGRITY); |
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| 181 | |
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| 182 | if (!lib->plugins->load(lib->plugins, NULL, |
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| 183 | lib->settings->get_str(lib->settings, "pki.load", PLUGINS))) |
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| 184 | exit(SS_RC_INITIALIZATION_FAILED); |
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[8bd77b5] | 185 | |
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| 186 | attr_hashkeyid_list = abac_list_new(); |
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[5110d42] | 187 | id_hashkeyid_list = abac_list_new(); |
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[5450aeb] | 188 | } |
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| 189 | |
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[186cb75] | 190 | /** |
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| 191 | * Uninitialize the system, free up any allocated memory. |
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| 192 | */ |
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[43e3b71] | 193 | void abac_verifier_deinit(void) { |
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[2485307] | 194 | if(debug)fprintf(stderr, "abac_verifier_deinit... being called..\n"); |
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[137b55f] | 195 | |
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[8bd77b5] | 196 | abac_id_credential_t *ptr; |
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| 197 | while ((ptr = id_creds) != NULL) { |
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[2485307] | 198 | if(debug) fprintf(stderr, "abac_verifier_deinit: deleting id (%s)\n",abac_id_name(ptr->id)); |
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[8bd77b5] | 199 | HASH_DEL(id_creds, ptr); |
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| 200 | |
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[137b55f] | 201 | free(ptr->hashkeyid); |
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[8bd77b5] | 202 | free(ptr->pl_clause); |
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[137b55f] | 203 | abac_id_free(ptr->id); |
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[8bd77b5] | 204 | free(ptr); |
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[186cb75] | 205 | } |
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[55c272b] | 206 | |
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[8bd77b5] | 207 | abac_credential_t *ptr2; |
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| 208 | while ((ptr2 = attr_creds) != NULL) { |
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| 209 | HASH_DEL(attr_creds, ptr2); |
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| 210 | if(debug) { |
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[2485307] | 211 | fprintf(stderr, "abac_verifier_deinit: deleting attr hashkey(%s)\n",ptr2->hashkeyid); |
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[8bd77b5] | 212 | } |
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| 213 | free(ptr2->hashkeyid); |
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| 214 | abac_attribute_free(ptr2->attr); |
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| 215 | char *cur=NULL; |
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| 216 | abac_list_foreach(ptr2->pl_clauses, cur, |
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| 217 | free(cur); |
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| 218 | ); |
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| 219 | free(ptr2->pl_clauses); |
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| 220 | free(ptr2); |
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[53e540d] | 221 | } |
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| 222 | |
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[8bd77b5] | 223 | if(attr_hashkeyid_list) { |
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| 224 | char *cur; |
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| 225 | if(attr_hashkeyid_list) { |
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| 226 | abac_list_foreach(attr_hashkeyid_list, cur, |
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| 227 | if(cur) free(cur); |
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| 228 | ); |
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| 229 | } |
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| 230 | abac_list_free(attr_hashkeyid_list); |
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| 231 | } |
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[137b55f] | 232 | |
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[5110d42] | 233 | if(id_hashkeyid_list) { |
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[2485307] | 234 | if(debug) fprintf(stderr, "looking to free id_hashkeyid_lst..\n"); |
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[5110d42] | 235 | char *cur; |
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| 236 | if(id_hashkeyid_list) { |
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| 237 | abac_list_foreach(id_hashkeyid_list, cur, |
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[137b55f] | 238 | if(cur) { |
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[2485307] | 239 | if(debug) fprintf(stderr, "hum.. id hashkey being freed.. %s\n", cur); |
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[137b55f] | 240 | free(cur); |
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| 241 | } |
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[5110d42] | 242 | ); |
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| 243 | } |
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| 244 | abac_list_free(id_hashkeyid_list); |
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| 245 | } |
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| 246 | |
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[55c272b] | 247 | library_deinit(); |
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[186cb75] | 248 | } |
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| 249 | |
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[8bd77b5] | 250 | abac_id_credential_t *abac_verifier_add_id_credential(abac_id_t *a_id) |
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| 251 | { |
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| 252 | abac_id_credential_t *id_cred; |
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| 253 | char *cn=abac_id_cn(a_id); |
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[d037f54] | 254 | char *keyid=abac_id_keyid(a_id); |
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[8bd77b5] | 255 | |
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[440ba20] | 256 | if(debug) { |
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[2485307] | 257 | fprintf(stderr, "abac_verifier_add_id_credential, cn(%s),keyid(%s)\n", |
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[440ba20] | 258 | cn, keyid); |
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| 259 | } |
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| 260 | |
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[8bd77b5] | 261 | // add the abac_id to the map of id credentials |
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| 262 | id_cred = abac_xmalloc(sizeof(abac_id_credential_t)); |
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| 263 | id_cred->hashkeyid = abac_xstrdup(keyid); |
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| 264 | id_cred->id=abac_id_dup(a_id); |
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| 265 | |
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| 266 | /* special handling here */ |
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| 267 | if(USE("ABAC_CN")) { |
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| 268 | id_cred->pl_clause = generate_pl_type_clause(cn, abac_id_idtype(a_id)); |
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| 269 | } else { |
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[d037f54] | 270 | id_cred->pl_clause=generate_pl_type_clause(prologIt(keyid), abac_id_idtype(a_id)); |
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[8bd77b5] | 271 | } |
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| 272 | HASH_ADD_KEYPTR(hh, id_creds, id_cred->hashkeyid, strlen(id_cred->hashkeyid), id_cred); |
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| 273 | if(debug) |
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[2485307] | 274 | fprintf(stderr, "-->adding into id_creds, (%s)..cnt(%d)(%d)\n", |
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[ba6027a] | 275 | id_cred->hashkeyid, HASH_COUNT(id_creds),(int)id_cred); |
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[8bd77b5] | 276 | |
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[5110d42] | 277 | assert(id_hashkeyid_list); |
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| 278 | abac_list_add(id_hashkeyid_list, abac_xstrdup(id_cred->hashkeyid)); |
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| 279 | return id_cred; |
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[8bd77b5] | 280 | } |
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| 281 | |
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[6244e28] | 282 | /* have to find the last cn |
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| 283 | CN=test/emailAddress=abac.isi.edu, CN=12345678 |
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| 284 | CN=client |
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| 285 | ..CN=255a03f3-ed30/emailAddress=.. |
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| 286 | */ |
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| 287 | static char* _extract_cn(char *string) |
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| 288 | { |
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[cfa7b6e] | 289 | /* find the first CN= */ |
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[6244e28] | 290 | char *ptr=strstr(string,"CN="); |
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| 291 | if(ptr == NULL) return NULL; |
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| 292 | |
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| 293 | /* look for last CN= */ |
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| 294 | while(1) { |
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| 295 | char *tptr=ptr+3; |
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| 296 | char *p=strstr(tptr,"CN="); |
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| 297 | if(p) ptr=p; |
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| 298 | else break; |
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| 299 | } |
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| 300 | |
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| 301 | /* remove the possible additional stuff */ |
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| 302 | char *cn=abac_xstrdup(ptr); /* it would get write over */ |
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| 303 | char *nptr=strtok(cn,"/"); |
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| 304 | char *pcn=abac_xmalloc(sizeof(char) * strlen(nptr)); |
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| 305 | pcn[0]='p'; |
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[cfa7b6e] | 306 | /* special case.. replace empty space with _ */ |
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| 307 | int i=strlen(nptr); |
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| 308 | while(i--) |
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| 309 | if(nptr[i]==' ') nptr[i]='_'; |
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[6244e28] | 310 | sscanf(nptr,"CN=%s", &pcn[1]); |
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| 311 | free(cn); |
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| 312 | return pcn; |
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| 313 | } |
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| 314 | |
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[5450aeb] | 315 | /** |
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[440ba20] | 316 | * Load an ID |
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[5450aeb] | 317 | */ |
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[8bd77b5] | 318 | static int _load_id(abac_id_t **a_id,certificate_t *cert, abac_id_credential_t **id_cred_ret) { |
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| 319 | abac_id_credential_t *id_cred = NULL; |
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[d037f54] | 320 | char *keyid = NULL; |
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[5450aeb] | 321 | chunk_t id; |
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| 322 | int ret; |
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[2ef48fa] | 323 | x509_t *x509 = (x509_t *)cert; |
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[5450aeb] | 324 | |
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[e898049] | 325 | assert(cert != NULL); |
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[5450aeb] | 326 | |
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[7727f26] | 327 | // get the key ID, add p to keyid SHA here */ |
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[2ef48fa] | 328 | id = x509->get_subjectKeyIdentifier(x509); |
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[d037f54] | 329 | keyid = _chunk_to_string(id); |
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[327e808] | 330 | |
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[0d0c3a9] | 331 | /* Mike said this is the way it is */ |
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[6244e28] | 332 | char *str=NULL; |
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[53e540d] | 333 | int rv = asprintf(&str, "%Y", cert->get_issuer(cert)); |
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| 334 | |
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[cfa7b6e] | 335 | /* add p to cn name here, if there is no useable one |
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| 336 | reuse keyid */ |
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[6244e28] | 337 | char *cn=_extract_cn(str); |
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| 338 | if(cn == NULL) { |
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[cfa7b6e] | 339 | if(debug) |
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| 340 | fprintf(stderr, "DEBUG:did not find usable cn, reuse keyid\n"); |
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| 341 | cn=abac_xstrdup(keyid); |
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[53e540d] | 342 | } |
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| 343 | |
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[202a7f9] | 344 | if(debug) { |
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[2485307] | 345 | fprintf(stderr, "DEBUG:keyid %s \n", keyid); |
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| 346 | fprintf(stderr, "DEBUG:issuer '%s' \n", str); |
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| 347 | fprintf(stderr, "DEBUG:cn %s \n", cn); |
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[202a7f9] | 348 | } |
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[53e540d] | 349 | free(str); |
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| 350 | |
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[327e808] | 351 | // if we already have this cert 'error' with success |
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[8bd77b5] | 352 | HASH_FIND_STR(id_creds, keyid, id_cred); |
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| 353 | if (id_cred != NULL) { |
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[2485307] | 354 | if(debug) fprintf(stderr, "existing cert \n"); |
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[440ba20] | 355 | ret = ABAC_CERT_EXISTS; |
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[327e808] | 356 | goto error; |
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| 357 | } |
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| 358 | |
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[cfa7b6e] | 359 | // validate validity |
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| 360 | ret = _verify_validity(cert); |
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| 361 | if (!ret) { |
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| 362 | ret = ABAC_CERT_INVALID; |
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| 363 | goto error; |
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| 364 | } |
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| 365 | |
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[5450aeb] | 366 | // validate sig |
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[dfe6b61] | 367 | ret = verify_signature(cert, cert); |
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[0779c99] | 368 | if (!ret) { |
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[cfa7b6e] | 369 | /* well.. this is not a self signed cert, don't fault it anymore */ |
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| 370 | if(debug) fprintf(stderr, "This is not a self-signed cert \n"); |
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| 371 | } else { |
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| 372 | if(debug) fprintf(stderr, "This is a self-signed cert \n"); |
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[0779c99] | 373 | } |
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[5450aeb] | 374 | |
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[8bd77b5] | 375 | // success, add a new abac_id |
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[440ba20] | 376 | if(*a_id==NULL) { |
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| 377 | *a_id=abac_id_keyid_new(keyid,cn,cert); |
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| 378 | } |
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[5450aeb] | 379 | |
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[8bd77b5] | 380 | abac_id_credential_t *n_id_cred=abac_verifier_add_id_credential(*a_id); |
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| 381 | *id_cred_ret=n_id_cred; |
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[202a7f9] | 382 | |
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[6244e28] | 383 | if (keyid != NULL) free(keyid); |
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| 384 | if (cn != NULL) free(cn); |
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| 385 | |
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[0779c99] | 386 | return ABAC_CERT_SUCCESS; |
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[5450aeb] | 387 | |
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| 388 | error: |
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[327e808] | 389 | if (keyid != NULL) free(keyid); |
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[53e540d] | 390 | if (cn != NULL) free(cn); |
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[5450aeb] | 391 | |
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[0779c99] | 392 | return ret; |
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[5450aeb] | 393 | } |
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| 394 | |
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[8bd77b5] | 395 | /* collect all the creds stored so far */ |
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| 396 | abac_stack_t *abac_verifier_dump_creds() |
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[202a7f9] | 397 | { |
---|
[8bd77b5] | 398 | abac_stack_t *cred_list = abac_stack_new(); |
---|
| 399 | |
---|
| 400 | int cnt=0; |
---|
| 401 | if(attr_hashkeyid_list) { |
---|
| 402 | char *keyid; |
---|
| 403 | abac_credential_t *cred; |
---|
| 404 | abac_list_foreach(attr_hashkeyid_list, keyid, |
---|
| 405 | cred=abac_credential_lookup(keyid); |
---|
| 406 | abac_stack_push(cred_list, cred); |
---|
| 407 | cnt++; |
---|
| 408 | ); |
---|
| 409 | } |
---|
[2485307] | 410 | if(debug) fprintf(stderr, "abac_verifier_dump_cred: %d\n",cnt); |
---|
[8bd77b5] | 411 | return cred_list; |
---|
| 412 | } |
---|
| 413 | |
---|
[5110d42] | 414 | /* collect all the id stored so far */ |
---|
| 415 | abac_stack_t *abac_verifier_dump_principals() |
---|
| 416 | { |
---|
| 417 | abac_stack_t *id_list = abac_stack_new(); |
---|
| 418 | |
---|
| 419 | int cnt=0; |
---|
| 420 | if(id_hashkeyid_list) { |
---|
| 421 | char *keyid; |
---|
| 422 | abac_id_credential_t *id; |
---|
| 423 | abac_list_foreach(id_hashkeyid_list, keyid, |
---|
| 424 | id=abac_id_credential_lookup(keyid); |
---|
| 425 | abac_stack_push(id_list, id); |
---|
| 426 | cnt++; |
---|
| 427 | ); |
---|
| 428 | } |
---|
[2485307] | 429 | if(debug) fprintf(stderr, "abac_verifier_dump_principals: %d\n",cnt); |
---|
[5110d42] | 430 | return id_list; |
---|
| 431 | } |
---|
| 432 | |
---|
[8bd77b5] | 433 | |
---|
| 434 | static void check_id_cred(abac_id_credential_t *id_cred) |
---|
| 435 | { |
---|
| 436 | if(id_cred) { |
---|
| 437 | printf("checking on this id_cred location %d\n", (int)id_cred); |
---|
| 438 | printf(" --> sha is (%s)\n", abac_id_keyid(id_cred->id)); |
---|
| 439 | printf(" --> cn is (%s)\n", abac_id_cn(id_cred->id)); |
---|
[202a7f9] | 440 | } |
---|
| 441 | } |
---|
| 442 | |
---|
| 443 | /** |
---|
| 444 | * Load an attribute cert as string. |
---|
| 445 | * have minimum syntax & validity check |
---|
| 446 | */ |
---|
| 447 | static int _load_attribute_string(char* attr_string) { |
---|
| 448 | printf("NOT implemented yet!!!"); |
---|
| 449 | return ABAC_CERT_INVALID; |
---|
| 450 | } |
---|
| 451 | |
---|
[e898049] | 452 | /** |
---|
| 453 | * Load an ID cert from a file. |
---|
| 454 | */ |
---|
[ba6027a] | 455 | int abac_verifier_load_id_file_key_file(char *filename, char *keyfilename, |
---|
| 456 | abac_id_credential_t **id_cred_ret) |
---|
| 457 | { |
---|
[8bd77b5] | 458 | abac_id_t *id=NULL; |
---|
[61278ec] | 459 | if (lib == NULL) |
---|
| 460 | errx(1, "looks like you didn't call libabac_init() (lib is NULL)"); |
---|
| 461 | |
---|
[2485307] | 462 | if(debug) fprintf(stderr, "loading id file... %s\n", filename); |
---|
[d037f54] | 463 | |
---|
[137b55f] | 464 | // load the cert, with public key |
---|
[e898049] | 465 | certificate_t *cert = lib->creds->create( |
---|
| 466 | lib->creds, CRED_CERTIFICATE, CERT_X509, |
---|
| 467 | BUILD_FROM_FILE, filename, |
---|
| 468 | BUILD_X509_FLAG, X509_AA, // attribute authority, dumb |
---|
| 469 | BUILD_END |
---|
| 470 | ); |
---|
[d037f54] | 471 | |
---|
[e898049] | 472 | if (cert == NULL) |
---|
[0779c99] | 473 | return ABAC_CERT_INVALID; |
---|
[d037f54] | 474 | |
---|
| 475 | int rc=_load_id(&id,cert,id_cred_ret); |
---|
[440ba20] | 476 | if(rc==ABAC_CERT_EXISTS) { |
---|
[2485307] | 477 | if(debug) fprintf(stderr, "abac_verifier_load_id_files: id already exists\n"); |
---|
[440ba20] | 478 | return ABAC_CERT_SUCCESS; |
---|
| 479 | } |
---|
| 480 | |
---|
[d037f54] | 481 | /* try to load the private key if it is there */ |
---|
[2efdff5] | 482 | if((rc==ABAC_CERT_SUCCESS) && keyfilename!=NULL && file_exist(keyfilename)) { |
---|
[2485307] | 483 | if(debug) fprintf(stderr, "loading... %s\n", keyfilename); |
---|
[5110d42] | 484 | int keyrc=abac_id_load_privkey_file(id, keyfilename); |
---|
[d037f54] | 485 | if(debug) { |
---|
[2485307] | 486 | if(keyrc == 1) fprintf(stderr, "..load_id_file: load(%s) with a private key\n",filename); |
---|
[d037f54] | 487 | else printf("..load_id_file: load(%s) without a private key\n",filename); |
---|
| 488 | } |
---|
| 489 | } |
---|
[2efdff5] | 490 | return ABAC_CERT_SUCCESS; |
---|
[8bd77b5] | 491 | } |
---|
| 492 | |
---|
[ba6027a] | 493 | int abac_verifier_load_enc_id_file_key_file(char *filename, char *keyfilename, |
---|
| 494 | char *pfile, abac_id_credential_t **id_cred_ret) |
---|
| 495 | { |
---|
| 496 | abac_id_t *id=NULL; |
---|
| 497 | if (lib == NULL) |
---|
| 498 | errx(1, "looks like you didn't call libabac_init() (lib is NULL)"); |
---|
| 499 | |
---|
[2485307] | 500 | if(debug) fprintf(stderr, "loading id file... %s\n", filename); |
---|
[ba6027a] | 501 | |
---|
| 502 | // load the cert, with public key |
---|
| 503 | certificate_t *cert = lib->creds->create( |
---|
| 504 | lib->creds, CRED_CERTIFICATE, CERT_X509, |
---|
| 505 | BUILD_FROM_FILE, filename, |
---|
| 506 | BUILD_X509_FLAG, X509_AA, // attribute authority, dumb |
---|
| 507 | BUILD_END |
---|
| 508 | ); |
---|
| 509 | |
---|
| 510 | if (cert == NULL) |
---|
| 511 | return ABAC_CERT_INVALID; |
---|
| 512 | |
---|
| 513 | int rc=_load_id(&id,cert,id_cred_ret); |
---|
| 514 | if(rc==ABAC_CERT_EXISTS) { |
---|
[2485307] | 515 | if(debug) fprintf(stderr, "abac_verifier_load_id_files: id already exists\n"); |
---|
[ba6027a] | 516 | return ABAC_CERT_SUCCESS; |
---|
| 517 | } |
---|
| 518 | |
---|
| 519 | /* try to load the private key if it is there */ |
---|
| 520 | if((rc==ABAC_CERT_SUCCESS) && keyfilename!=NULL && file_exist(keyfilename)) { |
---|
[2485307] | 521 | if(debug) fprintf(stderr, "loading... %s\n", keyfilename); |
---|
[ba6027a] | 522 | int keyrc=abac_id_load_enc_privkey_file(id, keyfilename, pfile); |
---|
| 523 | if(debug) { |
---|
[2485307] | 524 | if(keyrc == 1) fprintf(stderr, "..load_id_file: load(%s) with a private key\n",filename); |
---|
[ba6027a] | 525 | else printf("..load_id_file: load(%s) without a private key\n",filename); |
---|
| 526 | } |
---|
| 527 | } |
---|
| 528 | return ABAC_CERT_SUCCESS; |
---|
| 529 | } |
---|
| 530 | |
---|
[8bd77b5] | 531 | /** |
---|
| 532 | * Load an ID cert from a abac_id_t |
---|
| 533 | */ |
---|
| 534 | int abac_verifier_load_id_id(abac_id_t *id, abac_id_credential_t **id_cred_ret) { |
---|
| 535 | certificate_t *cert = abac_id_cert(id); |
---|
| 536 | return _load_id(&id,cert,id_cred_ret); |
---|
[e898049] | 537 | } |
---|
| 538 | |
---|
[5110d42] | 539 | /** |
---|
| 540 | * Load an ID cert from a chunk. |
---|
| 541 | */ |
---|
| 542 | int abac_verifier_load_id_pem_chunk(chunk_t chunk, abac_id_credential_t **id_cred_ret) { |
---|
| 543 | abac_id_t *id=NULL; |
---|
| 544 | // load the cert |
---|
| 545 | certificate_t *cert = lib->creds->create( |
---|
| 546 | lib->creds, CRED_CERTIFICATE, CERT_X509, |
---|
| 547 | BUILD_BLOB_PEM, chunk, |
---|
| 548 | BUILD_X509_FLAG, X509_AA, // attribute authority, dumb |
---|
| 549 | BUILD_END |
---|
| 550 | ); |
---|
| 551 | if (cert == NULL) |
---|
| 552 | return ABAC_CERT_INVALID; |
---|
| 553 | return _load_id(&id, cert,id_cred_ret); |
---|
| 554 | } |
---|
[e898049] | 555 | /** |
---|
[9b43fc3] | 556 | * Load an ID cert from a chunk, Note, this only loads the id cert part |
---|
| 557 | * and so it is not suitable for creating an attribute credential with. |
---|
| 558 | * Only a complete id cert + privkey could create attribute credential. |
---|
[e898049] | 559 | */ |
---|
[8bd77b5] | 560 | int abac_verifier_load_id_chunk(chunk_t chunk, abac_id_credential_t **id_cred_ret) { |
---|
| 561 | abac_id_t *id=NULL; |
---|
[e898049] | 562 | // load the cert |
---|
| 563 | certificate_t *cert = lib->creds->create( |
---|
| 564 | lib->creds, CRED_CERTIFICATE, CERT_X509, |
---|
| 565 | BUILD_BLOB_ASN1_DER, chunk, |
---|
| 566 | BUILD_X509_FLAG, X509_AA, // attribute authority, dumb |
---|
| 567 | BUILD_END |
---|
| 568 | ); |
---|
| 569 | if (cert == NULL) |
---|
[0779c99] | 570 | return ABAC_CERT_INVALID; |
---|
[8bd77b5] | 571 | return _load_id(&id, cert,id_cred_ret); |
---|
[e898049] | 572 | } |
---|
| 573 | |
---|
[9b43fc3] | 574 | /** |
---|
| 575 | * Load an ID cert from a cert chunk and a privkey chunk, |
---|
| 576 | * this complete id cert + privkey could create attribute credential. |
---|
| 577 | */ |
---|
| 578 | int abac_verifier_load_id_privkey_chunk(chunk_t chunk, chunk_t privkey_chunk, |
---|
| 579 | abac_id_credential_t **id_cred_ret) { |
---|
| 580 | |
---|
| 581 | abac_id_t *id=NULL; |
---|
| 582 | // load the cert |
---|
| 583 | certificate_t *cert = lib->creds->create( |
---|
| 584 | lib->creds, CRED_CERTIFICATE, CERT_X509, |
---|
| 585 | BUILD_BLOB_ASN1_DER, chunk, |
---|
| 586 | BUILD_X509_FLAG, X509_AA, // attribute authority, dumb |
---|
| 587 | BUILD_END |
---|
| 588 | ); |
---|
| 589 | if (cert == NULL) |
---|
| 590 | return ABAC_CERT_INVALID; |
---|
| 591 | |
---|
| 592 | int rc=_load_id(&id, cert,id_cred_ret); |
---|
| 593 | if(rc == ABAC_CERT_SUCCESS) { |
---|
| 594 | rc=abac_id_load_privkey_chunk(id, privkey_chunk); |
---|
| 595 | } |
---|
| 596 | |
---|
| 597 | return rc; |
---|
| 598 | } |
---|
| 599 | |
---|
[ba6027a] | 600 | int abac_verifier_load_id_enc_privkey_chunk(chunk_t chunk, chunk_t privkey_chunk, |
---|
| 601 | char* pfile, abac_id_credential_t **id_cred_ret) { |
---|
| 602 | |
---|
| 603 | abac_id_t *id=NULL; |
---|
| 604 | // load the cert |
---|
| 605 | certificate_t *cert = lib->creds->create( |
---|
| 606 | lib->creds, CRED_CERTIFICATE, CERT_X509, |
---|
| 607 | BUILD_BLOB_ASN1_DER, chunk, |
---|
| 608 | BUILD_X509_FLAG, X509_AA, // attribute authority, dumb |
---|
| 609 | BUILD_END |
---|
| 610 | ); |
---|
| 611 | if (cert == NULL) |
---|
| 612 | return ABAC_CERT_INVALID; |
---|
| 613 | |
---|
| 614 | int rc=_load_id(&id, cert,id_cred_ret); |
---|
| 615 | if(rc == ABAC_CERT_SUCCESS) { |
---|
| 616 | rc=abac_id_load_enc_privkey_chunk(id, privkey_chunk, pfile); |
---|
| 617 | } |
---|
| 618 | |
---|
| 619 | return rc; |
---|
| 620 | } |
---|
| 621 | |
---|
| 622 | |
---|
[9b43fc3] | 623 | |
---|
[2efdff5] | 624 | abac_id_t *abac_verifier_load_issuer(char *filename, char *keyfilename) |
---|
| 625 | { |
---|
| 626 | abac_id_credential_t *id_cred=NULL; |
---|
| 627 | int ret=abac_verifier_load_id_file_key_file(filename,keyfilename,&id_cred); |
---|
| 628 | if(ret !=ABAC_CERT_SUCCESS) |
---|
| 629 | return NULL; |
---|
| 630 | abac_id_t *issuer=abac_id_credential_id(id_cred); |
---|
| 631 | return issuer; |
---|
| 632 | } |
---|
| 633 | |
---|
[53e540d] | 634 | |
---|
[5110d42] | 635 | static int matchex(const char *subject, const char *pattern, int *so, int *eo) |
---|
| 636 | { |
---|
| 637 | int rc; // Returned code |
---|
| 638 | regmatch_t pmatch; |
---|
| 639 | |
---|
| 640 | regex_t re; // Compiled regexp pattern |
---|
| 641 | |
---|
| 642 | if (regcomp(&re, pattern, 0) != 0) return 0; |
---|
| 643 | |
---|
| 644 | rc = regexec(&re, subject, 1 , &pmatch, 0); |
---|
| 645 | regfree(&re); |
---|
| 646 | |
---|
| 647 | if (rc == REG_NOMATCH ) return 0; |
---|
| 648 | |
---|
| 649 | *so=pmatch.rm_so; |
---|
| 650 | *eo=pmatch.rm_eo; |
---|
| 651 | |
---|
| 652 | return 1; |
---|
| 653 | } |
---|
| 654 | |
---|
| 655 | |
---|
| 656 | |
---|
| 657 | static chunk_t _extract_chunk(char *data, char* startline, char* endline) |
---|
| 658 | { |
---|
| 659 | int found=0; |
---|
| 660 | int startos=0; |
---|
| 661 | int endos=0; |
---|
| 662 | regex_t re; |
---|
| 663 | regmatch_t pm; |
---|
| 664 | int rc; |
---|
| 665 | |
---|
| 666 | int st; |
---|
| 667 | int et; |
---|
| 668 | |
---|
| 669 | rc=matchex(data, startline, &st, &et); |
---|
| 670 | if(rc==0) return chunk_empty; |
---|
| 671 | startos=st; |
---|
| 672 | |
---|
| 673 | rc=matchex(data, endline, &st, &et); |
---|
| 674 | if(rc==0) return chunk_empty; |
---|
| 675 | endos=et; |
---|
| 676 | |
---|
| 677 | int len=endos - startos; |
---|
| 678 | |
---|
[2485307] | 679 | if(debug) fprintf(stderr, "making a chunk of size (%d) from %d and %d\n",len, startos,endos); |
---|
[5110d42] | 680 | char *ptr=strndup(data+startos,len); |
---|
| 681 | |
---|
| 682 | chunk_t ret = { ptr, len }; |
---|
| 683 | return ret; |
---|
| 684 | } |
---|
| 685 | |
---|
| 686 | |
---|
| 687 | int abac_verifier_load_idkey_file(char *filename, abac_id_credential_t **id_cred_ret) |
---|
| 688 | { |
---|
| 689 | struct stat sb; |
---|
| 690 | int fd; |
---|
| 691 | int rc; |
---|
| 692 | |
---|
| 693 | fd = open(filename, O_RDONLY); |
---|
| 694 | if (fd == -1) { return 1; } |
---|
| 695 | if(stat(filename, &sb) == -1) { |
---|
| 696 | close(fd); |
---|
| 697 | return 1; |
---|
| 698 | } |
---|
| 699 | char* data = (char *)mmap(NULL, sb.st_size, PROT_READ, MAP_PRIVATE, fd, 0); |
---|
| 700 | if(data == MAP_FAILED) { |
---|
| 701 | close(fd); |
---|
| 702 | return 1; |
---|
| 703 | } |
---|
| 704 | close(fd); |
---|
| 705 | |
---|
| 706 | chunk_t key_pem_chunk=_extract_chunk(data, |
---|
| 707 | "-----BEGIN RSA PRIVATE KEY-----","-----END RSA PRIVATE KEY-----"); |
---|
| 708 | chunk_t cert_pem_chunk=_extract_chunk(data, |
---|
| 709 | "-----BEGIN CERTIFICATE-----","-----END CERTIFICATE-----"); |
---|
| 710 | |
---|
| 711 | /* key=0, cert=0 */ |
---|
| 712 | if(key_pem_chunk.len==0 && cert_pem_chunk.len==0) { |
---|
[2485307] | 713 | if(debug) fprintf(stderr, "abac_verifier_load_idkey_file: no key or id in idkey_file\n"); |
---|
[5110d42] | 714 | goto error; |
---|
| 715 | } |
---|
| 716 | |
---|
| 717 | /* key=0, cert=1 */ |
---|
| 718 | if(key_pem_chunk.len==0) { |
---|
[2485307] | 719 | if(debug) fprintf(stderr, "abac_verifier_load_idkey_file: no key in idkey_file\n"); |
---|
[5110d42] | 720 | munmap(data, sb.st_size); |
---|
| 721 | chunk_free(&key_pem_chunk); |
---|
| 722 | return abac_verifier_load_id_file_key_file(filename,NULL,id_cred_ret); |
---|
| 723 | } |
---|
| 724 | |
---|
| 725 | /* key=1, cert=1 */ |
---|
| 726 | if(cert_pem_chunk.len!=0) { |
---|
| 727 | if(debug) { |
---|
[2485307] | 728 | fprintf(stderr, "loading cert pem chunk %d\n", cert_pem_chunk.len); |
---|
[5110d42] | 729 | printf("(%s)\n",cert_pem_chunk.ptr); |
---|
| 730 | } |
---|
| 731 | rc=abac_verifier_load_id_pem_chunk(cert_pem_chunk, id_cred_ret); |
---|
| 732 | if(rc != 0) { |
---|
[2485307] | 733 | if(debug) fprintf(stderr, "abac_verifier_load_idkey_file: fail to load the id\n"); |
---|
[5110d42] | 734 | goto error; |
---|
| 735 | } |
---|
| 736 | /* key=1, cert=0 */ |
---|
| 737 | } else { |
---|
[2485307] | 738 | if(debug) fprintf(stderr, "abac_verifier_load_idkey_file: there is no id info in there\n"); |
---|
[5110d42] | 739 | goto error; |
---|
| 740 | } |
---|
| 741 | |
---|
| 742 | /* handle the key_pem_chunk */ |
---|
| 743 | if(debug) { |
---|
[2485307] | 744 | fprintf(stderr, "loading key pem chunk %d\n", key_pem_chunk.len); |
---|
[5110d42] | 745 | printf("(%s)\n",key_pem_chunk.ptr); |
---|
| 746 | } |
---|
| 747 | abac_id_t *id=abac_id_credential_id(*id_cred_ret); |
---|
| 748 | rc=abac_id_load_privkey_chunk(id, key_pem_chunk); |
---|
| 749 | if(rc==0) { |
---|
| 750 | printf("abac_verifier_load_idkey_file:failed to load priv key!!!\n"); |
---|
| 751 | goto error; |
---|
| 752 | } |
---|
| 753 | |
---|
| 754 | munmap(data, sb.st_size); |
---|
| 755 | return 0; |
---|
| 756 | |
---|
| 757 | error: |
---|
| 758 | munmap(data, sb.st_size); |
---|
| 759 | return 1; |
---|
| 760 | } |
---|
| 761 | |
---|
| 762 | |
---|
[ba6027a] | 763 | int abac_verifier_load_enc_idkey_file(char *filename, char *pfile, |
---|
| 764 | abac_id_credential_t **id_cred_ret) |
---|
| 765 | { |
---|
| 766 | struct stat sb; |
---|
| 767 | int fd; |
---|
| 768 | int rc; |
---|
| 769 | |
---|
| 770 | fd = open(filename, O_RDONLY); |
---|
| 771 | if (fd == -1) { return 1; } |
---|
| 772 | if(stat(filename, &sb) == -1) { |
---|
| 773 | close(fd); |
---|
| 774 | return 1; |
---|
| 775 | } |
---|
| 776 | char* data = (char *)mmap(NULL, sb.st_size, PROT_READ, MAP_PRIVATE, fd, 0); |
---|
| 777 | if(data == MAP_FAILED) { |
---|
| 778 | close(fd); |
---|
| 779 | return 1; |
---|
| 780 | } |
---|
| 781 | close(fd); |
---|
| 782 | |
---|
| 783 | chunk_t key_pem_chunk=_extract_chunk(data, |
---|
| 784 | "-----BEGIN RSA PRIVATE KEY-----","-----END RSA PRIVATE KEY-----"); |
---|
| 785 | chunk_t cert_pem_chunk=_extract_chunk(data, |
---|
| 786 | "-----BEGIN CERTIFICATE-----","-----END CERTIFICATE-----"); |
---|
| 787 | |
---|
| 788 | /* key=0, cert=0 */ |
---|
| 789 | if(key_pem_chunk.len==0 && cert_pem_chunk.len==0) { |
---|
[2485307] | 790 | if(debug) fprintf(stderr, "abac_verifier_load_idkey_file: no key or id in idkey_file\n"); |
---|
[ba6027a] | 791 | goto error; |
---|
| 792 | } |
---|
| 793 | |
---|
| 794 | /* key=0, cert=1 */ |
---|
| 795 | if(key_pem_chunk.len==0) { |
---|
[2485307] | 796 | if(debug) fprintf(stderr, "abac_verifier_load_idkey_file: no key in idkey_file\n"); |
---|
[ba6027a] | 797 | munmap(data, sb.st_size); |
---|
| 798 | chunk_free(&key_pem_chunk); |
---|
| 799 | return abac_verifier_load_id_file_key_file(filename,NULL,id_cred_ret); |
---|
| 800 | } |
---|
| 801 | |
---|
| 802 | /* key=1, cert=1 */ |
---|
| 803 | if(cert_pem_chunk.len!=0) { |
---|
| 804 | if(debug) { |
---|
[2485307] | 805 | fprintf(stderr, "loading cert pem chunk %d\n", cert_pem_chunk.len); |
---|
[ba6027a] | 806 | printf("(%s)\n",cert_pem_chunk.ptr); |
---|
| 807 | } |
---|
| 808 | rc=abac_verifier_load_id_pem_chunk(cert_pem_chunk, id_cred_ret); |
---|
| 809 | if(rc != 0) { |
---|
[2485307] | 810 | if(debug) fprintf(stderr, "abac_verifier_load_idkey_file: fail to load the id\n"); |
---|
[ba6027a] | 811 | goto error; |
---|
| 812 | } |
---|
| 813 | /* key=1, cert=0 */ |
---|
| 814 | } else { |
---|
[2485307] | 815 | if(debug) fprintf(stderr, "abac_verifier_load_idkey_file: there is no id info in there\n"); |
---|
[ba6027a] | 816 | goto error; |
---|
| 817 | } |
---|
| 818 | |
---|
| 819 | /* handle the key_pem_chunk */ |
---|
| 820 | if(debug) { |
---|
[2485307] | 821 | fprintf(stderr, "loading key pem chunk %d\n", key_pem_chunk.len); |
---|
[ba6027a] | 822 | printf("(%s)\n",key_pem_chunk.ptr); |
---|
| 823 | printf("(%d)\n",strlen(key_pem_chunk.ptr)); |
---|
| 824 | } |
---|
| 825 | abac_id_t *id=abac_id_credential_id(*id_cred_ret); |
---|
| 826 | rc=abac_id_load_enc_privkey_chunk(id, key_pem_chunk, pfile); |
---|
| 827 | if(rc==0) { |
---|
| 828 | printf("abac_verifier_load_idkey_file:failed to load priv key!!!\n"); |
---|
| 829 | goto error; |
---|
| 830 | } |
---|
| 831 | |
---|
| 832 | munmap(data, sb.st_size); |
---|
| 833 | return 0; |
---|
| 834 | |
---|
| 835 | error: |
---|
| 836 | munmap(data, sb.st_size); |
---|
| 837 | return 1; |
---|
| 838 | } |
---|
[5110d42] | 839 | |
---|
[da5afdf] | 840 | void abac_print_clauses(abac_list_t *clauses, FILE *fp) |
---|
[202a7f9] | 841 | { |
---|
| 842 | if (clauses != NULL) { |
---|
| 843 | char *cur; |
---|
[7b548fa] | 844 | printf("total-- %d clauses\n", abac_list_size(clauses)); |
---|
[202a7f9] | 845 | abac_list_foreach(clauses, cur, |
---|
[da5afdf] | 846 | if(cur) { |
---|
| 847 | if(fp) |
---|
| 848 | fprintf (fp,"a clause, %d(%s)\n", (int)cur,cur); |
---|
| 849 | else printf ("a clause, %d(%s)\n", (int)cur,cur); |
---|
| 850 | } |
---|
[202a7f9] | 851 | ); |
---|
| 852 | } |
---|
| 853 | } |
---|
| 854 | |
---|
[8bd77b5] | 855 | abac_id_credential_t *abac_id_credential_dup(abac_id_credential_t *ptr) { |
---|
| 856 | assert(ptr != NULL); |
---|
[ba6027a] | 857 | if(debug) |
---|
[2485307] | 858 | fprintf(stderr, "calling abac_id_credential_dup, increment id ref count\n"); |
---|
[8bd77b5] | 859 | abac_id_dup(ptr->id); |
---|
| 860 | return ptr; |
---|
| 861 | } |
---|
| 862 | |
---|
| 863 | abac_id_t *abac_id_credential_id(abac_id_credential_t *ptr) |
---|
[da5afdf] | 864 | { |
---|
[8bd77b5] | 865 | assert(ptr); |
---|
| 866 | return ptr->id; |
---|
| 867 | } |
---|
[53e540d] | 868 | |
---|
| 869 | |
---|
[8bd77b5] | 870 | abac_id_credential_t *abac_id_credential_lookup(char *pname) |
---|
| 871 | { |
---|
| 872 | abac_id_credential_t *id_cred=NULL; |
---|
| 873 | HASH_FIND_STR(id_creds, pname, id_cred); |
---|
[5110d42] | 874 | if(id_cred != NULL) |
---|
| 875 | return abac_id_credential_dup(id_cred); |
---|
| 876 | else return NULL; |
---|
[8bd77b5] | 877 | } |
---|
[7727f26] | 878 | |
---|
[8bd77b5] | 879 | void abac_id_credential_free(abac_id_credential_t *ptr) |
---|
| 880 | { |
---|
| 881 | if (ptr == NULL) |
---|
| 882 | return; |
---|
[53e540d] | 883 | |
---|
[5110d42] | 884 | if(debug) |
---|
[2485307] | 885 | fprintf(stderr, "abac_id_credential_free:freeing (%s)\n", abac_id_name(ptr->id)); |
---|
[5110d42] | 886 | |
---|
[8bd77b5] | 887 | // this is very hacky... |
---|
| 888 | int last=abac_id_lastone(ptr->id); |
---|
| 889 | if(!last) { |
---|
[2485307] | 890 | if(debug) fprintf(stderr, "abac_id_credential_free:not last one\n"); |
---|
[8bd77b5] | 891 | abac_id_free(ptr->id); |
---|
| 892 | } else { |
---|
[2485307] | 893 | if(debug) fprintf(stderr, "abac_id_credential_free: deleting id (%s)\n",abac_id_name(ptr->id)); |
---|
[8bd77b5] | 894 | free(ptr->hashkeyid); |
---|
| 895 | if(ptr->pl_clause) |
---|
| 896 | free(ptr->pl_clause); |
---|
| 897 | abac_id_free(ptr->id); |
---|
| 898 | HASH_DEL(id_creds, ptr); |
---|
| 899 | free(ptr); |
---|
[53e540d] | 900 | } |
---|
[da5afdf] | 901 | } |
---|
| 902 | |
---|
[8bd77b5] | 903 | /****************************************************************************/ |
---|
| 904 | |
---|
[5d06689] | 905 | static int _verify_valid_credential_string(certificate_t *cert, |
---|
[da5afdf] | 906 | abac_credential_t **cred_ret, char *encoded_attr_string) |
---|
| 907 | { |
---|
[8bd77b5] | 908 | abac_aspect_t *head_aspect = NULL; |
---|
| 909 | abac_aspect_t *tail_aspect = NULL; |
---|
[da5afdf] | 910 | abac_list_t *clauses=NULL; |
---|
[8bd77b5] | 911 | abac_id_credential_t *id_cred; |
---|
| 912 | abac_id_t *issuer_id; |
---|
[da5afdf] | 913 | int ret, i; |
---|
| 914 | |
---|
| 915 | // get the attr |
---|
[8bd77b5] | 916 | head_aspect = abac_yy_get_rule_head_aspect(); |
---|
| 917 | tail_aspect = abac_yy_get_rule_tail_aspect(); |
---|
[b5a3da4] | 918 | clauses = abac_yy_get_rule_clauses(); |
---|
[53e540d] | 919 | |
---|
| 920 | // get the issuer based on keyid |
---|
[8bd77b5] | 921 | char *principalname = abac_aspect_principal_principalname(head_aspect); |
---|
[2485307] | 922 | if(debug) fprintf(stderr, "LOOKING for %s\n", principalname); |
---|
[8bd77b5] | 923 | |
---|
| 924 | HASH_FIND_STR(id_creds, principalname, id_cred); |
---|
[d037f54] | 925 | if(id_cred == NULL) { |
---|
| 926 | ret = ABAC_CERT_MISSING_ISSUER; |
---|
| 927 | if(debug) |
---|
[2485307] | 928 | fprintf(stderr, "can not find %s in id_creds\n", principalname); |
---|
[d037f54] | 929 | goto error; |
---|
| 930 | } |
---|
[8bd77b5] | 931 | issuer_id=id_cred->id; |
---|
| 932 | if (issuer_id == NULL) { |
---|
[53e540d] | 933 | ret = ABAC_CERT_MISSING_ISSUER; |
---|
[8bd77b5] | 934 | if(debug) |
---|
[2485307] | 935 | fprintf(stderr, "can not find %s in id_creds\n", principalname); |
---|
[53e540d] | 936 | goto error; |
---|
| 937 | } |
---|
| 938 | |
---|
| 939 | // make sure the issuer's signed it |
---|
[dfe6b61] | 940 | ret = verify_signature(abac_id_cert(issuer_id), cert); |
---|
[53e540d] | 941 | if (!ret) { |
---|
[b5a3da4] | 942 | abac_yy_set_error_code(ABAC_RT_CERT_BAD_SIG); |
---|
[5110d42] | 943 | ret=ABAC_CERT_BAD_SIG; |
---|
[53e540d] | 944 | goto error; |
---|
| 945 | } |
---|
| 946 | |
---|
[8bd77b5] | 947 | // at this point we know we have a good attribute cert baked it in |
---|
| 948 | abac_attribute_t *attr=abac_attribute_new(issuer_id, cert, cert->get_ref(cert)); |
---|
| 949 | abac_attribute_set_head(attr, head_aspect); |
---|
| 950 | abac_attribute_add_tail(attr, tail_aspect); |
---|
| 951 | |
---|
[53e540d] | 952 | abac_credential_t *cred = abac_xmalloc(sizeof(abac_credential_t)); |
---|
[8bd77b5] | 953 | cred->hashkeyid=abac_xstrdup(encoded_attr_string); |
---|
| 954 | cred->attr=attr; |
---|
| 955 | cred->pl_clauses = clauses; |
---|
[53e540d] | 956 | *cred_ret = cred; |
---|
| 957 | |
---|
| 958 | // success, add the key to the map of certificates |
---|
[8bd77b5] | 959 | HASH_ADD_KEYPTR(hh, attr_creds, cred->hashkeyid, strlen(cred->hashkeyid), cred); |
---|
[53e540d] | 960 | |
---|
[8bd77b5] | 961 | assert(attr_hashkeyid_list); |
---|
| 962 | abac_list_add(attr_hashkeyid_list, abac_xstrdup(cred->hashkeyid)); |
---|
[9b43fc3] | 963 | |
---|
| 964 | if(debug) |
---|
[2485307] | 965 | fprintf(stderr, "-->adding into attr_creds 2, (%s)..cnt(%d)\n", |
---|
[9b43fc3] | 966 | cred->hashkeyid, HASH_COUNT(attr_creds)); |
---|
| 967 | |
---|
[da5afdf] | 968 | return ABAC_CERT_SUCCESS; |
---|
| 969 | |
---|
| 970 | error: |
---|
[8bd77b5] | 971 | if (head_aspect) abac_aspect_free(head_aspect); |
---|
| 972 | if (tail_aspect) abac_aspect_free(tail_aspect); |
---|
[b5a3da4] | 973 | abac_yy_free_rule_clauses(); |
---|
[da5afdf] | 974 | |
---|
| 975 | return ret; |
---|
| 976 | } |
---|
[8bd77b5] | 977 | |
---|
[da5afdf] | 978 | /** |
---|
| 979 | * Load an attribute cert. |
---|
| 980 | * Returns true only if the certificate is valid and is issued by the proper |
---|
| 981 | * authority. |
---|
[5d06689] | 982 | * attribute string is parsed via yyparse call |
---|
[da5afdf] | 983 | */ |
---|
| 984 | static int _load_attribute_cert(certificate_t *cert, abac_credential_t **cred_ret) { |
---|
| 985 | ietf_attributes_t *attr_cert = NULL; |
---|
| 986 | int ret, i; |
---|
| 987 | |
---|
| 988 | // get the attr |
---|
| 989 | ac_t *ac = (ac_t *)cert; |
---|
| 990 | attr_cert = ac->get_groups(ac); |
---|
| 991 | if (attr_cert == NULL) { |
---|
| 992 | ret = ABAC_CERT_INVALID; |
---|
| 993 | goto error; |
---|
| 994 | } |
---|
| 995 | |
---|
| 996 | char *encoded_attr_string=attr_cert->get_string(attr_cert); |
---|
| 997 | char *attr_string = abac_decode_string(encoded_attr_string); |
---|
| 998 | if(debug) |
---|
[2485307] | 999 | fprintf(stderr, "string to be yyparse..(%d)(%s)\n",strlen(attr_string),attr_string); |
---|
[da5afdf] | 1000 | |
---|
| 1001 | if (attr_string == NULL) { |
---|
| 1002 | ret = ABAC_CERT_INVALID; |
---|
| 1003 | goto error; |
---|
| 1004 | } |
---|
| 1005 | |
---|
| 1006 | /* call into yacc parser */ |
---|
| 1007 | abac_reset_yyfptr(attr_string); |
---|
[b5a3da4] | 1008 | abac_yy_init(); |
---|
[da5afdf] | 1009 | int rc=yyparse(); |
---|
| 1010 | if (rc) { |
---|
| 1011 | ret = ABAC_CERT_INVALID; |
---|
| 1012 | goto error; |
---|
| 1013 | } |
---|
| 1014 | |
---|
[5d06689] | 1015 | ret=_verify_valid_credential_string(cert,cred_ret,encoded_attr_string); |
---|
[da5afdf] | 1016 | |
---|
[5110d42] | 1017 | if(ret != ABAC_CERT_SUCCESS) { |
---|
[671c065] | 1018 | char *tmp=NULL; |
---|
| 1019 | asprintf(&tmp,"_load_attribute_cert: fail to process (%s)",encoded_attr_string); |
---|
| 1020 | panic(tmp); |
---|
[5110d42] | 1021 | } |
---|
| 1022 | |
---|
[53e540d] | 1023 | // free up some crap |
---|
| 1024 | attr_cert->destroy(attr_cert); |
---|
| 1025 | |
---|
[5110d42] | 1026 | return ret; |
---|
[53e540d] | 1027 | |
---|
| 1028 | error: |
---|
[202a7f9] | 1029 | if (cert) cert->destroy(cert); |
---|
| 1030 | if (attr_cert) attr_cert->destroy(attr_cert); |
---|
[0779c99] | 1031 | return ret; |
---|
[5450aeb] | 1032 | } |
---|
[5f99fbc] | 1033 | |
---|
[8bd77b5] | 1034 | /** |
---|
| 1035 | * Load an attribute cert from a abac_attribute_t. |
---|
[5d06689] | 1036 | * attr should be all checked out before arriving here |
---|
[8bd77b5] | 1037 | */ |
---|
[5d06689] | 1038 | int abac_verifier_load_attribute_cert_attribute(abac_attribute_t *ptr, abac_credential_t **cred_ret) { |
---|
| 1039 | // get the attr |
---|
| 1040 | abac_aspect_t *head=abac_attribute_head(ptr); |
---|
| 1041 | abac_aspect_t *tail=abac_attribute_tail(ptr); |
---|
| 1042 | |
---|
| 1043 | // preprocess for constraint part |
---|
| 1044 | preprocess_pl_head(head); |
---|
| 1045 | preprocess_pl_tail(tail); |
---|
| 1046 | |
---|
[9b43fc3] | 1047 | /* setup the encoded attribute string */ |
---|
| 1048 | char *encoded_attr_string=get_cred_encoding(ptr); |
---|
| 1049 | generate_pl_set_abac_yyfptr_encoded(encoded_attr_string); |
---|
| 1050 | /* collect up type clauses, constraint clauses and |
---|
[5d06689] | 1051 | generate rule clauses */ |
---|
| 1052 | abac_list_t *clauses=generate_pl_clauses(head,tail); |
---|
[9b43fc3] | 1053 | |
---|
[b8a6fd2a] | 1054 | if(debug) abac_print_clauses(clauses,NULL); |
---|
[5d06689] | 1055 | |
---|
| 1056 | abac_credential_t *cred = abac_xmalloc(sizeof(abac_credential_t)); |
---|
| 1057 | cred->hashkeyid=abac_xstrdup(encoded_attr_string); |
---|
| 1058 | cred->attr=abac_attribute_dup(ptr); |
---|
| 1059 | cred->pl_clauses = clauses; |
---|
| 1060 | *cred_ret = cred; |
---|
| 1061 | |
---|
| 1062 | // success, add the key to the map of certificates |
---|
| 1063 | HASH_ADD_KEYPTR(hh, attr_creds, cred->hashkeyid, strlen(cred->hashkeyid), cred); |
---|
| 1064 | |
---|
| 1065 | assert(attr_hashkeyid_list); |
---|
| 1066 | abac_list_add(attr_hashkeyid_list, abac_xstrdup(cred->hashkeyid)); |
---|
[9b43fc3] | 1067 | |
---|
| 1068 | if(debug) |
---|
[2485307] | 1069 | fprintf(stderr, "-->adding into attr_creds, (%s)..cnt(%d)\n", |
---|
[9b43fc3] | 1070 | cred->hashkeyid, HASH_COUNT(attr_creds)); |
---|
[5d06689] | 1071 | return ABAC_CERT_SUCCESS; |
---|
[8bd77b5] | 1072 | } |
---|
| 1073 | |
---|
[e898049] | 1074 | /** |
---|
| 1075 | * Load an attribute cert from a file. |
---|
| 1076 | */ |
---|
[0779c99] | 1077 | int abac_verifier_load_attribute_cert_file(char *filename, abac_credential_t **cred) { |
---|
[e898049] | 1078 | // load the cert |
---|
[2485307] | 1079 | if(debug) fprintf(stderr, "..loading attr file %s\n", filename); |
---|
[e898049] | 1080 | certificate_t *cert = lib->creds->create( |
---|
| 1081 | lib->creds, CRED_CERTIFICATE, CERT_X509_AC, |
---|
| 1082 | BUILD_FROM_FILE, filename, |
---|
| 1083 | BUILD_END |
---|
| 1084 | ); |
---|
| 1085 | if (cert == NULL) |
---|
[0779c99] | 1086 | return ABAC_CERT_INVALID; |
---|
| 1087 | return _load_attribute_cert(cert, cred); |
---|
[e898049] | 1088 | } |
---|
| 1089 | |
---|
| 1090 | /** |
---|
| 1091 | * Load an attribute cert from a chunk. |
---|
| 1092 | */ |
---|
[0779c99] | 1093 | int abac_verifier_load_attribute_cert_chunk(chunk_t chunk, abac_credential_t **cred) { |
---|
[e898049] | 1094 | // load the cert |
---|
| 1095 | certificate_t *cert = lib->creds->create( |
---|
| 1096 | lib->creds, CRED_CERTIFICATE, CERT_X509_AC, |
---|
| 1097 | BUILD_BLOB_ASN1_DER, chunk, |
---|
| 1098 | BUILD_END |
---|
| 1099 | ); |
---|
| 1100 | if (cert == NULL) |
---|
[0779c99] | 1101 | return ABAC_CERT_INVALID; |
---|
[9b43fc3] | 1102 | |
---|
[0779c99] | 1103 | return _load_attribute_cert(cert, cred); |
---|
[e898049] | 1104 | } |
---|
| 1105 | |
---|
[85cdf53] | 1106 | /** |
---|
| 1107 | * Return the encoding of the attribute cert. |
---|
| 1108 | */ |
---|
[401a054] | 1109 | abac_chunk_t abac_credential_attribute_cert(abac_credential_t *cred) { |
---|
[8bd77b5] | 1110 | abac_attribute_t *ptr=cred->attr; |
---|
| 1111 | certificate_t *cert=abac_attribute_cert(ptr); |
---|
[137b55f] | 1112 | chunk_t encoding = chunk_empty; |
---|
| 1113 | int rc=cert->get_encoding(cert,CERT_ASN1_DER,&encoding); |
---|
[9efbfbf] | 1114 | abac_chunk_t ret = { encoding.ptr, encoding.len }; |
---|
| 1115 | return ret; |
---|
[85cdf53] | 1116 | } |
---|
| 1117 | |
---|
| 1118 | /** |
---|
| 1119 | * Return the encoding of the issuer cert. |
---|
| 1120 | */ |
---|
[401a054] | 1121 | abac_chunk_t abac_credential_issuer_cert(abac_credential_t *cred) { |
---|
[8bd77b5] | 1122 | certificate_t *issuer_cert=abac_attribute_issuer_cert(cred->attr); |
---|
| 1123 | assert(issuer_cert); |
---|
[137b55f] | 1124 | chunk_t encoding = chunk_empty; |
---|
| 1125 | // XXX MEI, not sure ?? |
---|
| 1126 | int rc=issuer_cert->get_encoding(issuer_cert,CERT_ASN1_DER,&encoding); |
---|
[9efbfbf] | 1127 | abac_chunk_t ret = { encoding.ptr, encoding.len }; |
---|
| 1128 | return ret; |
---|
[85cdf53] | 1129 | } |
---|
[186cb75] | 1130 | |
---|
[53e540d] | 1131 | /** |
---|
| 1132 | * Return the clause of the cert |
---|
| 1133 | */ |
---|
[202a7f9] | 1134 | abac_list_t *abac_credential_clauses(abac_credential_t *cred) { |
---|
[8bd77b5] | 1135 | return cred->pl_clauses; |
---|
[53e540d] | 1136 | } |
---|
| 1137 | |
---|
[8bd77b5] | 1138 | abac_attribute_t *abac_credential_attribute(abac_credential_t *cred) { |
---|
| 1139 | assert(cred); |
---|
| 1140 | return cred->attr; |
---|
| 1141 | } |
---|
[202a7f9] | 1142 | |
---|
[186cb75] | 1143 | /** |
---|
[fbb591e] | 1144 | * Increase the ref count of a credential. |
---|
[186cb75] | 1145 | */ |
---|
[401a054] | 1146 | abac_credential_t *abac_credential_dup(abac_credential_t *cred) { |
---|
| 1147 | assert(cred != NULL); |
---|
[186cb75] | 1148 | |
---|
[8bd77b5] | 1149 | abac_attribute_dup(cred->attr); |
---|
[fbb591e] | 1150 | return cred; |
---|
[186cb75] | 1151 | } |
---|
| 1152 | |
---|
[53e540d] | 1153 | /** |
---|
| 1154 | * lookup for a credential. |
---|
| 1155 | */ |
---|
[202a7f9] | 1156 | abac_credential_t *abac_credential_lookup(char* cred_string) |
---|
| 1157 | { |
---|
| 1158 | if(debug) |
---|
[2485307] | 1159 | fprintf(stderr, "abac_credential_lookup: looking for (%s)\n", cred_string); |
---|
[8bd77b5] | 1160 | abac_credential_t *attr_cred; |
---|
[9b43fc3] | 1161 | |
---|
[8bd77b5] | 1162 | HASH_FIND_STR(attr_creds, cred_string, attr_cred); |
---|
| 1163 | if (attr_cred == NULL) { |
---|
[2485307] | 1164 | if(debug) fprintf(stderr, "DEBUG:NOT FOUND..\n"); |
---|
[53e540d] | 1165 | return NULL; |
---|
| 1166 | } |
---|
[8bd77b5] | 1167 | abac_credential_t *rt=abac_credential_dup(attr_cred); |
---|
[2485307] | 1168 | if(debug) fprintf(stderr, "DEBUG:FOUND.. (%d) returning, (%d)\n", (int)attr_cred, (int) rt); |
---|
[8bd77b5] | 1169 | return rt; |
---|
[53e540d] | 1170 | } |
---|
| 1171 | |
---|
[186cb75] | 1172 | /** |
---|
[fbb591e] | 1173 | * Decrease the reference count of a credential, freeing it when it reaches 0. |
---|
[186cb75] | 1174 | */ |
---|
[202a7f9] | 1175 | void abac_credential_free(abac_credential_t *cred) |
---|
| 1176 | { |
---|
| 1177 | if(debug) |
---|
[2485307] | 1178 | fprintf(stderr, "abac_credential_free:freeing cred(%d)clause(%d)\n", (int)cred, (int)cred->pl_clauses); |
---|
[202a7f9] | 1179 | |
---|
[401a054] | 1180 | if (cred == NULL) |
---|
[186cb75] | 1181 | return; |
---|
| 1182 | |
---|
[8bd77b5] | 1183 | // this is very hacky... |
---|
| 1184 | int last=abac_attribute_lastone(cred->attr); |
---|
| 1185 | if(!last) { |
---|
| 1186 | abac_attribute_free(cred->attr); |
---|
[da5afdf] | 1187 | } else { |
---|
[2485307] | 1188 | if(debug) fprintf(stderr, "abac_credential_free: real free for (%d)\n",(int) cred); |
---|
[8bd77b5] | 1189 | free(cred->hashkeyid); |
---|
| 1190 | char *cur=NULL; |
---|
| 1191 | abac_list_foreach(cred->pl_clauses, cur, |
---|
| 1192 | free(cur); |
---|
| 1193 | ); |
---|
| 1194 | abac_attribute_free(cred->attr); |
---|
| 1195 | HASH_DEL(attr_creds, cred); |
---|
| 1196 | free(cred); |
---|
[da5afdf] | 1197 | } |
---|
[186cb75] | 1198 | } |
---|
[53e540d] | 1199 | |
---|
[8bd77b5] | 1200 | char *abac_id_clause(abac_id_credential_t *id_cred) |
---|
[202a7f9] | 1201 | { |
---|
[8bd77b5] | 1202 | if(id_cred) |
---|
| 1203 | return id_cred->pl_clause; |
---|
[202a7f9] | 1204 | return NULL; |
---|
| 1205 | } |
---|
| 1206 | |
---|
[53e540d] | 1207 | /* retrieve the cn that is associated with this sha_string */ |
---|
[5110d42] | 1208 | char *abac_cn_with_sha(char *sha_string) |
---|
| 1209 | { |
---|
[53e540d] | 1210 | // get the issuer based on keyid |
---|
[8bd77b5] | 1211 | abac_id_credential_t *id_cred; |
---|
| 1212 | HASH_FIND_STR(id_creds, sha_string, id_cred); |
---|
| 1213 | if (id_cred == NULL) { |
---|
[53e540d] | 1214 | return NULL; |
---|
| 1215 | } |
---|
[202a7f9] | 1216 | if(debug) |
---|
[8bd77b5] | 1217 | check_id_cred(id_cred); |
---|
| 1218 | return abac_id_cn(id_cred->id); |
---|
[53e540d] | 1219 | } |
---|
| 1220 | |
---|
[8bd77b5] | 1221 | char *abac_idtype_with_sha(char* sha_string) |
---|
| 1222 | { |
---|
| 1223 | // get the issuer based on keyid |
---|
| 1224 | abac_id_credential_t *id_cred; |
---|
| 1225 | HASH_FIND_STR(id_creds, sha_string, id_cred); |
---|
| 1226 | if (id_cred == NULL) { |
---|
[6244e28] | 1227 | // this id, sha string is not in the db... |
---|
| 1228 | if(debug) |
---|
| 1229 | fprintf(stderr,"abac_idtype_with_sha: this id is not in the id_creds list\n"); |
---|
[8bd77b5] | 1230 | return NULL; |
---|
| 1231 | } |
---|
| 1232 | int idtype=abac_id_idtype(id_cred->id); |
---|
| 1233 | |
---|
| 1234 | return abac_idtype_string(idtype); |
---|
[923b4dd] | 1235 | } |
---|
| 1236 | |
---|
[8bd77b5] | 1237 | abac_aspect_t *abac_credential_head(abac_credential_t *cred) { |
---|
| 1238 | return abac_attribute_head(cred->attr); |
---|
[923b4dd] | 1239 | } |
---|
| 1240 | |
---|
[8bd77b5] | 1241 | abac_aspect_t *abac_credential_tail(abac_credential_t *cred) { |
---|
| 1242 | return abac_attribute_tail(cred->attr); |
---|
[923b4dd] | 1243 | } |
---|
| 1244 | |
---|
| 1245 | |
---|