[8bd77b5] | 1 | |
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| 2 | /* abac.c using prolog */ |
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| 3 | |
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| 4 | #include <assert.h> |
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| 5 | #include <err.h> |
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| 6 | #include <glob.h> |
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| 7 | |
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| 8 | #include <chunk.h> |
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| 9 | |
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| 10 | #include "abac_internal.h" |
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| 11 | |
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| 12 | #include "abac_pl_yap.h" |
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| 13 | #include "abac_util.h" |
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| 14 | #include "abac_verifier.h" |
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| 15 | |
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| 16 | static int debug=0; |
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| 17 | |
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| 18 | struct _abac_context_t { |
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| 19 | abac_pl_t *pl; |
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| 20 | }; |
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| 21 | |
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| 22 | /** |
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| 23 | * Init the library. |
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| 24 | */ |
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| 25 | void libabac_init(void) { |
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| 26 | void libabac_deinit(void); |
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| 27 | static int has_been_init = 0; |
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| 28 | |
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| 29 | // called every time a context is created, so only do it once |
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| 30 | if (!has_been_init) { |
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| 31 | abac_verifier_init(); |
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| 32 | atexit(libabac_deinit); |
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| 33 | has_been_init = 1; |
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| 34 | } |
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| 35 | } |
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| 36 | |
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| 37 | /** |
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| 38 | * Deinit the library. |
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| 39 | */ |
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| 40 | void libabac_deinit(void) { |
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| 41 | abac_verifier_deinit(); |
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| 42 | } |
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| 43 | |
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| 44 | /** |
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| 45 | * Create a new abac context. |
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| 46 | */ |
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| 47 | abac_context_t *abac_context_new(void) { |
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| 48 | libabac_init(); |
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| 49 | |
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| 50 | abac_context_t *ctx = abac_xmalloc(sizeof(abac_context_t)); |
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| 51 | ctx->pl = abac_pl_new(); |
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| 52 | return ctx; |
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| 53 | } |
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| 54 | |
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| 55 | /** |
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| 56 | * Deep copy an abac context. -- XXX dummy stub |
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| 57 | */ |
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| 58 | abac_context_t *abac_context_dup(abac_context_t *ctx) { |
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| 59 | assert(ctx != NULL); |
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| 60 | abac_context_t *dup = abac_xmalloc(sizeof(abac_context_t)); |
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| 61 | return dup; |
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| 62 | } |
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| 63 | |
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| 64 | |
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| 65 | /** |
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| 66 | * Free an abac context. |
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| 67 | */ |
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| 68 | void abac_context_free(abac_context_t *ctx) { |
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| 69 | assert(ctx != NULL); |
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| 70 | |
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| 71 | abac_pl_free(ctx->pl); |
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| 72 | free(ctx); |
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| 73 | } |
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| 74 | |
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| 75 | /** |
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| 76 | * Load an ID cert from an abac_id_t. |
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| 77 | */ |
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| 78 | int abac_context_load_id_id(abac_context_t *ctx, abac_id_t *id) { |
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| 79 | assert(ctx != NULL); assert(id); |
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| 80 | abac_id_credential_t *id_cert=NULL; |
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| 81 | int ret = abac_verifier_load_id_id(id,&id_cert); |
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| 82 | if(id_cert) { |
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| 83 | int add_ret = abac_pl_add_type_credential(ctx->pl, id_cert); |
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| 84 | } |
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| 85 | return ret; |
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| 86 | } |
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| 87 | |
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| 88 | /** |
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| 89 | * Load an ID cert from a file. |
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| 90 | */ |
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[5110d42] | 91 | int abac_context_load_id_id_file_key_file(abac_context_t *ctx, char *filename, char *keyfilename) { |
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[d037f54] | 92 | assert(ctx != NULL); assert(filename != NULL); assert(keyfilename!=NULL); |
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[8bd77b5] | 93 | abac_id_credential_t *id_cert=NULL; |
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[5110d42] | 94 | int ret = abac_verifier_load_id_file_key_file(filename,keyfilename,&id_cert); |
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| 95 | if(id_cert) { |
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| 96 | int add_ret = abac_pl_add_type_credential(ctx->pl, id_cert); |
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| 97 | } |
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| 98 | return ret; |
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| 99 | } |
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| 100 | /** |
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| 101 | * Load an ID cert from a file, it may contain key part but not necessary. |
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| 102 | */ |
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| 103 | int abac_context_load_id_idkey_file(abac_context_t *ctx, char *filename) { |
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| 104 | assert(ctx != NULL); assert(filename != NULL); |
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| 105 | abac_id_credential_t *id_cert=NULL; |
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| 106 | int ret = abac_verifier_load_idkey_file(filename,&id_cert); |
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[8bd77b5] | 107 | if(id_cert) { |
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| 108 | int add_ret = abac_pl_add_type_credential(ctx->pl, id_cert); |
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| 109 | } |
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| 110 | return ret; |
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| 111 | } |
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| 112 | |
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| 113 | /** |
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| 114 | * Load an ID cert from a chunk. |
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| 115 | */ |
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| 116 | int abac_context_load_id_chunk(abac_context_t *ctx, abac_chunk_t cert) { |
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| 117 | assert(ctx != NULL); |
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| 118 | abac_id_credential_t *id_cert=NULL; |
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| 119 | chunk_t cert_chunk = { cert.ptr, cert.len }; |
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| 120 | int ret=abac_verifier_load_id_chunk(cert_chunk,&id_cert); |
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| 121 | if(id_cert) { |
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| 122 | int add_ret = abac_pl_add_type_credential(ctx->pl, id_cert); |
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| 123 | } |
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| 124 | return ret; |
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| 125 | } |
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| 126 | |
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[9b43fc3] | 127 | |
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| 128 | /** |
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| 129 | * Load an ID cert and privkey from chunks. |
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| 130 | */ |
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| 131 | int abac_context_load_id_privkey_chunk(abac_context_t *ctx, abac_chunk_t cert, abac_chunk_t privkey) { |
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| 132 | assert(ctx != NULL); |
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| 133 | abac_id_credential_t *id_cert=NULL; |
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| 134 | chunk_t cert_chunk = { cert.ptr, cert.len }; |
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| 135 | chunk_t privkey_chunk = { privkey.ptr, privkey.len }; |
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| 136 | int ret=abac_verifier_load_id_privkey_chunk(cert_chunk, privkey_chunk, &id_cert); |
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| 137 | |
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| 138 | if(id_cert) { |
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| 139 | int add_ret = abac_pl_add_type_credential(ctx->pl, id_cert); |
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| 140 | } |
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| 141 | return ret; |
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| 142 | } |
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| 143 | |
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| 144 | |
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[8bd77b5] | 145 | /** |
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| 146 | * Load an attribute cert from an abac_attribute_t. |
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| 147 | */ |
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| 148 | int abac_context_load_attribute_attribute(abac_context_t *ctx, abac_attribute_t *ptr) |
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| 149 | { |
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[5d06689] | 150 | int ret, add_ret; |
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| 151 | abac_credential_t *cred=NULL; |
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| 152 | |
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| 153 | assert(ctx != NULL); |
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| 154 | |
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| 155 | ret = abac_verifier_load_attribute_cert_attribute(ptr, &cred); |
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| 156 | if (ret == ABAC_CERT_SUCCESS) { |
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| 157 | add_ret = abac_pl_add_credential(ctx->pl, cred); |
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| 158 | assert(add_ret != ABAC_PL_CRED_INVALID); |
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| 159 | } |
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| 160 | |
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[8bd77b5] | 161 | return ret; |
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[5d06689] | 162 | |
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[8bd77b5] | 163 | } |
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| 164 | |
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| 165 | /** |
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| 166 | * Load an attribute cert from a file. |
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| 167 | */ |
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| 168 | int abac_context_load_attribute_file(abac_context_t *ctx, char *filename) { |
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| 169 | int ret, add_ret; |
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[5110d42] | 170 | abac_credential_t *cred=NULL; |
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[8bd77b5] | 171 | |
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| 172 | assert(ctx != NULL); assert(filename != NULL); |
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| 173 | |
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| 174 | ret = abac_verifier_load_attribute_cert_file(filename, &cred); |
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| 175 | if (ret == ABAC_CERT_SUCCESS) { |
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| 176 | add_ret = abac_pl_add_credential(ctx->pl, cred); |
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| 177 | assert(add_ret != ABAC_PL_CRED_INVALID); |
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| 178 | } |
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| 179 | |
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| 180 | return ret; |
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| 181 | } |
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| 182 | |
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| 183 | /** |
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| 184 | * Load an attribute cert from a chunk. |
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| 185 | */ |
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| 186 | int abac_context_load_attribute_chunk(abac_context_t *ctx, abac_chunk_t cert) { |
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| 187 | int ret, add_ret; |
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[5110d42] | 188 | abac_credential_t *cred=NULL; |
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[8bd77b5] | 189 | |
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| 190 | assert(ctx != NULL); |
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| 191 | |
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| 192 | chunk_t cert_chunk = { cert.ptr, cert.len }; |
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| 193 | |
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| 194 | ret = abac_verifier_load_attribute_cert_chunk(cert_chunk, &cred); |
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| 195 | if (ret == ABAC_CERT_SUCCESS) { |
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| 196 | add_ret = abac_pl_add_credential(ctx->pl, cred); |
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| 197 | assert(add_ret != ABAC_PL_CRED_INVALID); |
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[9b43fc3] | 198 | /* abac_credential_free(cred); */ |
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[8bd77b5] | 199 | } |
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| 200 | |
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| 201 | return ret; |
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| 202 | } |
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| 203 | |
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[d037f54] | 204 | #define KEY_PAT "/*_private.{der,pem}" |
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[8bd77b5] | 205 | #define ID_PAT "/*_ID.{der,pem}" |
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| 206 | #define ATTR_PAT "/*_attr.der" |
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[5110d42] | 207 | #define IDKEY_PAT "/*_IDKEY.{der,pem}" |
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[8bd77b5] | 208 | |
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[d037f54] | 209 | char *_make_key_filename(char *cert_file) |
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| 210 | { |
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| 211 | char *p=strstr(cert_file,"_ID."); |
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| 212 | char *head=strndup(cert_file,p-cert_file); |
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| 213 | char *tail=p+4; |
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| 214 | char *keyfile=NULL; |
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| 215 | asprintf(&keyfile,"%s_private.%s",head,tail); |
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| 216 | free(head); |
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| 217 | return keyfile; |
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| 218 | } |
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[2efdff5] | 219 | |
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| 220 | |
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[8bd77b5] | 221 | /** |
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[2efdff5] | 222 | * Load a directory full of principal certs. |
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[8bd77b5] | 223 | */ |
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[2efdff5] | 224 | void abac_context_load_principals(abac_context_t *ctx, char *path) { |
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[d037f54] | 225 | char *glob_pat, *key_pat; |
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[8bd77b5] | 226 | glob_t glob_buf; |
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| 227 | int i, ret; |
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| 228 | |
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| 229 | assert(ctx != NULL); assert(path != NULL); |
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| 230 | |
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| 231 | int dirlen = strlen(path); |
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[5110d42] | 232 | |
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| 233 | /* make sure pick the larger one */ |
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| 234 | glob_pat = abac_xmalloc(dirlen + sizeof(IDKEY_PAT)); |
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[8bd77b5] | 235 | memcpy(glob_pat, path, dirlen); |
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| 236 | |
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[2efdff5] | 237 | // load ID certs |
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[8bd77b5] | 238 | memcpy(glob_pat + dirlen, ID_PAT, sizeof(ID_PAT)); |
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| 239 | glob(glob_pat, GLOB_BRACE, NULL, &glob_buf); // TODO check for error |
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| 240 | for (i = 0; i < glob_buf.gl_pathc; ++i) { |
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[d037f54] | 241 | /* blah_ID.pem */ |
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[8bd77b5] | 242 | char *cert_file = glob_buf.gl_pathv[i]; |
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[d037f54] | 243 | /* blah_private.pem */ |
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| 244 | char *key_file=_make_key_filename(cert_file); |
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| 245 | if(debug) { |
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| 246 | printf("--> ID cert... %s\n", cert_file); |
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| 247 | printf("--> KEY cert... %s\n", key_file); |
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| 248 | } |
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[5110d42] | 249 | ret = abac_context_load_id_id_file_key_file(ctx, cert_file, key_file); |
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[8bd77b5] | 250 | if (ret != ABAC_CERT_SUCCESS) |
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| 251 | warnx("Couldn't load ID cert %s", cert_file); |
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| 252 | } |
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| 253 | globfree(&glob_buf); |
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| 254 | |
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[2efdff5] | 255 | // next load IDKEY certs |
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[5110d42] | 256 | memcpy(glob_pat + dirlen, IDKEY_PAT, sizeof(IDKEY_PAT)); |
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| 257 | glob(glob_pat, GLOB_BRACE, NULL, &glob_buf); // TODO check for error |
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| 258 | for (i = 0; i < glob_buf.gl_pathc; ++i) { |
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| 259 | /* blah_IDKEY.pem */ |
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| 260 | char *certkey_file = glob_buf.gl_pathv[i]; |
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[2efdff5] | 261 | if(debug) printf("--> IDKEY certkey... %s\n", certkey_file); |
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[5110d42] | 262 | ret = abac_context_load_id_idkey_file(ctx, certkey_file); |
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| 263 | if (ret != ABAC_CERT_SUCCESS) |
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| 264 | warnx("Couldn't load ID/KEY IDKEY cert %s", certkey_file); |
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| 265 | } |
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| 266 | globfree(&glob_buf); |
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| 267 | |
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[2efdff5] | 268 | free(glob_pat); |
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| 269 | } |
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| 270 | |
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| 271 | /** |
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| 272 | * Load a directory full of certs. |
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| 273 | */ |
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| 274 | void abac_context_load_directory(abac_context_t *ctx, char *path) { |
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| 275 | char *glob_pat, *key_pat; |
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| 276 | glob_t glob_buf; |
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| 277 | int i, ret; |
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| 278 | |
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| 279 | abac_context_load_principals(ctx,path); |
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| 280 | int dirlen = strlen(path); |
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| 281 | |
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| 282 | /* make sure pick the larger one */ |
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| 283 | glob_pat = abac_xmalloc(dirlen + sizeof(IDKEY_PAT)); |
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| 284 | memcpy(glob_pat, path, dirlen); |
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| 285 | |
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[8bd77b5] | 286 | memcpy(glob_pat + dirlen, ATTR_PAT, sizeof(ATTR_PAT)); |
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| 287 | glob(glob_pat, 0, NULL, &glob_buf); // TODO check for error |
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| 288 | for (i = 0; i < glob_buf.gl_pathc; ++i) { |
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| 289 | char *cert_file = glob_buf.gl_pathv[i]; |
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| 290 | |
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[2efdff5] | 291 | if(debug) printf("--> attr file... (%s)\n", cert_file); |
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[8bd77b5] | 292 | ret = abac_context_load_attribute_file(ctx, cert_file); |
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| 293 | if (ret != ABAC_CERT_SUCCESS) |
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| 294 | warnx("Couldn't load attribute cert %s", cert_file); |
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[2efdff5] | 295 | if(debug) printf("Loaded.. (%s)\n", cert_file); |
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[8bd77b5] | 296 | } |
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| 297 | globfree(&glob_buf); |
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| 298 | |
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| 299 | free(glob_pat); |
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| 300 | } |
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| 301 | |
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| 302 | /** |
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| 303 | * Run a query on the data in an abac context. Returns a NULL-terminated array |
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| 304 | * of abac_credential_t. Success/failure in *success. |
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| 305 | * queryfor(either role or oset), with(either keyid or object type) |
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| 306 | */ |
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| 307 | abac_credential_t **abac_context_query(abac_context_t *ctx, char *queryfor, char *with, int *success) { |
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[2efdff5] | 308 | if(debug) printf("abac_context_query about(%s) with(%s)\n", queryfor, with); |
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[8bd77b5] | 309 | abac_credential_t **credentials = NULL, *cur; |
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| 310 | assert(ctx != NULL); assert(queryfor != NULL); |
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| 311 | assert(with != NULL); assert(success != NULL); |
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| 312 | |
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| 313 | abac_stack_t *result = abac_pl_query(ctx->pl, queryfor, with); |
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| 314 | |
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| 315 | int size = abac_stack_size(result); |
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[d9c3886] | 316 | if (size > 0) { |
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| 317 | *success = 1; |
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| 318 | } else { |
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| 319 | // XXX NOT SURE YET.. |
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| 320 | // return partial proof |
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| 321 | *success = 0; |
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| 322 | } |
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| 323 | |
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| 324 | // make the array (leave space to NULL terminate it) |
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| 325 | // n.b., even if the list is empty, we still return an array that |
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| 326 | // only contains the NULL terminator |
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| 327 | credentials = abac_xmalloc(sizeof(abac_credential_t *) * (size + 1)); |
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| 328 | int i = 0; |
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| 329 | if(size) { |
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| 330 | while(i<size) { |
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| 331 | cur=(abac_credential_t *) abac_stack_pop(result); |
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| 332 | credentials[i++] = cur; |
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| 333 | } |
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| 334 | } |
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| 335 | credentials[i] = NULL; |
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| 336 | |
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| 337 | if(result) |
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| 338 | abac_stack_free(result); |
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| 339 | |
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| 340 | return credentials; |
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| 341 | } |
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| 342 | |
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| 343 | abac_credential_t **abac_context_query_with_structure(abac_context_t *ctx, |
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| 344 | abac_aspect_t *queryfor, abac_aspect_t *with, int *success) |
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| 345 | { |
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[2efdff5] | 346 | if(debug) printf("abac_context_query_with_structure\n"); |
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[d9c3886] | 347 | abac_credential_t **credentials = NULL, *cur; |
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| 348 | assert(ctx != NULL); assert(queryfor != NULL); |
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| 349 | assert(with != NULL); assert(success != NULL); |
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| 350 | |
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| 351 | abac_stack_t *result = abac_pl_query_with_structure(ctx->pl, queryfor, with); |
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| 352 | |
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| 353 | int size = abac_stack_size(result); |
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[8bd77b5] | 354 | if (size > 0) { |
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| 355 | *success = 1; |
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| 356 | } else { |
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| 357 | // XXX NOT SURE YET.. |
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| 358 | // return partial proof |
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| 359 | *success = 0; |
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| 360 | } |
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| 361 | |
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| 362 | // make the array (leave space to NULL terminate it) |
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| 363 | // n.b., even if the list is empty, we still return an array that |
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| 364 | // only contains the NULL terminator |
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| 365 | credentials = abac_xmalloc(sizeof(abac_credential_t *) * (size + 1)); |
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| 366 | int i = 0; |
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| 367 | if(size) { |
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| 368 | while(i<size) { |
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| 369 | cur=(abac_credential_t *) abac_stack_pop(result); |
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| 370 | credentials[i++] = cur; |
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| 371 | } |
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| 372 | } |
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| 373 | credentials[i] = NULL; |
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| 374 | |
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| 375 | if(result) |
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| 376 | abac_stack_free(result); |
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| 377 | |
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| 378 | return credentials; |
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| 379 | } |
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| 380 | |
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| 381 | /** |
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| 382 | * A NULL-terminated array of all the credentials in the context. |
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| 383 | */ |
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| 384 | abac_credential_t **abac_context_credentials(abac_context_t *ctx) { |
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| 385 | abac_credential_t **credentials = NULL, *cur; |
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| 386 | assert(ctx != NULL); |
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| 387 | |
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| 388 | abac_stack_t *result = abac_pl_credentials(ctx->pl); |
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| 389 | int size = abac_stack_size(result); |
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| 390 | |
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| 391 | // make the array (leave space to NULL terminate it) |
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| 392 | // n.b., even if the list is empty, we still return an array that |
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| 393 | // only contains the NULL terminator |
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| 394 | credentials = abac_xmalloc(sizeof(abac_credential_t *) * (size + 1)); |
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| 395 | int i = 0; |
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| 396 | if(size) { |
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| 397 | while(i<size) { |
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| 398 | cur=(abac_credential_t *) abac_stack_pop(result); |
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| 399 | /* if not in there yet, add into it */ |
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| 400 | credentials[i++] = cur; |
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| 401 | } |
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| 402 | } |
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| 403 | credentials[i] = NULL; |
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| 404 | |
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| 405 | if(result) |
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| 406 | abac_stack_free(result); |
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| 407 | return credentials; |
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| 408 | } |
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| 409 | |
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| 410 | /** |
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| 411 | * Frees a NULL-terminated list of credentials. |
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| 412 | */ |
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| 413 | void abac_context_credentials_free(abac_credential_t **credentials) { |
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| 414 | int i; |
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| 415 | |
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| 416 | if (credentials == NULL) |
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| 417 | return; |
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| 418 | |
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| 419 | for (i = 0; credentials[i] != NULL; ++i) |
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| 420 | abac_credential_free(credentials[i]); |
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| 421 | free(credentials); |
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| 422 | } |
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| 423 | |
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[5110d42] | 424 | /** |
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| 425 | * A NULL-terminated array of all the principals in the context. |
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| 426 | */ |
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| 427 | abac_id_credential_t **abac_context_principals(abac_context_t *ctx) { |
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| 428 | abac_id_credential_t **principals = NULL, *cur; |
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| 429 | assert(ctx != NULL); |
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| 430 | |
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| 431 | abac_stack_t *result = abac_pl_principals(ctx->pl); |
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| 432 | |
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| 433 | int size = abac_stack_size(result); |
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| 434 | |
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| 435 | // make the array (leave space to NULL terminate it) |
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| 436 | // n.b., even if the list is empty, we still return an array that |
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| 437 | // only contains the NULL terminator |
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| 438 | principals = abac_xmalloc(sizeof(abac_id_credential_t *) * (size + 1)); |
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| 439 | int i = 0; |
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| 440 | if(size) { |
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| 441 | while(i<size) { |
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| 442 | cur=(abac_id_credential_t *) abac_stack_pop(result); |
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| 443 | /* if not in there yet, add into it */ |
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| 444 | principals[i++] = cur; |
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| 445 | } |
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| 446 | } |
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| 447 | principals[i] = NULL; |
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| 448 | |
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| 449 | if(result) |
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| 450 | abac_stack_free(result); |
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| 451 | return principals; |
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| 452 | } |
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| 453 | |
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| 454 | /** |
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| 455 | * Frees a NULL-terminated list of principals. |
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| 456 | */ |
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| 457 | void abac_context_principals_free(abac_id_credential_t **principals) { |
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| 458 | int i; |
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| 459 | |
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| 460 | if (principals == NULL) |
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| 461 | return; |
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| 462 | |
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| 463 | for (i = 0; principals[i] != NULL; ++i) |
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| 464 | abac_id_credential_free(principals[i]); |
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| 465 | free(principals); |
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| 466 | } |
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| 467 | |
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