[90d20f0] | 1 | #include <assert.h> |
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[0bf0e67] | 2 | #include <err.h> |
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[03b3293] | 3 | #include <glob.h> |
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[90d20f0] | 4 | |
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[9efbfbf] | 5 | #include <chunk.h> |
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[90d20f0] | 6 | |
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[9efbfbf] | 7 | #include "abac.h" |
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[06293d1] | 8 | #include "abac_graph.h" |
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[3c251d0] | 9 | #include "abac_util.h" |
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[43e3b71] | 10 | #include "abac_verifier.h" |
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[90d20f0] | 11 | |
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[390f749] | 12 | struct _abac_context_t { |
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[06293d1] | 13 | abac_graph_t *graph; |
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[90d20f0] | 14 | }; |
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| 15 | |
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| 16 | /** |
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| 17 | * Init the library. |
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| 18 | */ |
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| 19 | void libabac_init(void) { |
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[55c272b] | 20 | void libabac_deinit(void); |
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| 21 | static int has_been_init = 0; |
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| 22 | |
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| 23 | // called every time a context is created, so only do it once |
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| 24 | if (!has_been_init) { |
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| 25 | abac_verifier_init(); |
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| 26 | atexit(libabac_deinit); |
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| 27 | has_been_init = 1; |
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| 28 | } |
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[90d20f0] | 29 | } |
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| 30 | |
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| 31 | /** |
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| 32 | * Deinit the library. |
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| 33 | */ |
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| 34 | void libabac_deinit(void) { |
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[43e3b71] | 35 | abac_verifier_deinit(); |
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[90d20f0] | 36 | } |
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| 37 | |
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| 38 | /** |
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| 39 | * Create a new abac context. |
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| 40 | */ |
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[390f749] | 41 | abac_context_t *abac_context_new(void) { |
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[55c272b] | 42 | libabac_init(); |
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| 43 | |
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[390f749] | 44 | abac_context_t *ctx = abac_xmalloc(sizeof(abac_context_t)); |
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| 45 | ctx->graph = abac_graph_new(); |
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| 46 | return ctx; |
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[90d20f0] | 47 | } |
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| 48 | |
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| 49 | /** |
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| 50 | * Deep copy an abac context. |
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| 51 | */ |
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[390f749] | 52 | abac_context_t *abac_context_dup(abac_context_t *ctx) { |
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| 53 | assert(ctx != NULL); |
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[90d20f0] | 54 | |
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[390f749] | 55 | abac_context_t *dup = abac_xmalloc(sizeof(abac_context_t)); |
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| 56 | dup->graph = abac_graph_dup(ctx->graph); |
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[90d20f0] | 57 | |
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| 58 | return dup; |
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| 59 | } |
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| 60 | |
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| 61 | /** |
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| 62 | * Free an abac context. |
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| 63 | */ |
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[390f749] | 64 | void abac_context_free(abac_context_t *ctx) { |
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| 65 | assert(ctx != NULL); |
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[90d20f0] | 66 | |
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[390f749] | 67 | abac_graph_free(ctx->graph); |
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| 68 | free(ctx); |
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[90d20f0] | 69 | } |
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| 70 | |
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| 71 | /** |
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| 72 | * Load an ID cert from a file. |
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| 73 | */ |
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[390f749] | 74 | int abac_context_load_id_file(abac_context_t *ctx, char *filename) { |
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| 75 | assert(ctx != NULL); assert(filename != NULL); |
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[43e3b71] | 76 | return abac_verifier_load_id_file(filename); |
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[90d20f0] | 77 | } |
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| 78 | |
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| 79 | /** |
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| 80 | * Load an ID cert from a chunk. |
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| 81 | */ |
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[390f749] | 82 | int abac_context_load_id_chunk(abac_context_t *ctx, abac_chunk_t cert) { |
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| 83 | assert(ctx != NULL); |
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[9efbfbf] | 84 | chunk_t cert_chunk = { cert.ptr, cert.len }; |
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[43e3b71] | 85 | return abac_verifier_load_id_chunk(cert_chunk); |
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[90d20f0] | 86 | } |
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| 87 | |
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| 88 | /** |
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| 89 | * Load an attribute cert from a file. |
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| 90 | */ |
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[390f749] | 91 | int abac_context_load_attribute_file(abac_context_t *ctx, char *filename) { |
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[0779c99] | 92 | int ret, add_ret; |
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| 93 | abac_credential_t *cred; |
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[6dd2d1a] | 94 | |
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[390f749] | 95 | assert(ctx != NULL); assert(filename != NULL); |
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[90d20f0] | 96 | |
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[0779c99] | 97 | ret = abac_verifier_load_attribute_cert_file(filename, &cred); |
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| 98 | if (ret == ABAC_CERT_SUCCESS) { |
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| 99 | add_ret = abac_graph_add_credential(ctx->graph, cred); |
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[314869f] | 100 | assert(add_ret != ABAC_GRAPH_CRED_INVALID); |
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[401a054] | 101 | abac_credential_free(cred); |
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[6dd2d1a] | 102 | } |
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| 103 | |
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| 104 | return ret; |
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[90d20f0] | 105 | } |
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| 106 | |
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| 107 | /** |
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| 108 | * Load an attribute cert from a chunk. |
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| 109 | */ |
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[390f749] | 110 | int abac_context_load_attribute_chunk(abac_context_t *ctx, abac_chunk_t cert) { |
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[0779c99] | 111 | int ret, add_ret; |
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| 112 | abac_credential_t *cred; |
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| 113 | |
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[390f749] | 114 | assert(ctx != NULL); |
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[90d20f0] | 115 | |
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[9efbfbf] | 116 | chunk_t cert_chunk = { cert.ptr, cert.len }; |
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[0779c99] | 117 | |
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| 118 | ret = abac_verifier_load_attribute_cert_chunk(cert_chunk, &cred); |
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| 119 | if (ret == ABAC_CERT_SUCCESS) { |
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| 120 | add_ret = abac_graph_add_credential(ctx->graph, cred); |
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[314869f] | 121 | assert(add_ret != ABAC_GRAPH_CRED_INVALID); |
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[0779c99] | 122 | abac_credential_free(cred); |
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| 123 | } |
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| 124 | |
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| 125 | return ret; |
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[90d20f0] | 126 | } |
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| 127 | |
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[50b9dc9] | 128 | #define ID_PAT "/*_ID.{der,pem}" |
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[03b3293] | 129 | #define ATTR_PAT "/*_attr.der" |
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| 130 | |
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| 131 | /** |
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| 132 | * Load a directory full of certs. |
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| 133 | */ |
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[390f749] | 134 | void abac_context_load_directory(abac_context_t *ctx, char *path) { |
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[03b3293] | 135 | char *glob_pat; |
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| 136 | glob_t glob_buf; |
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| 137 | int i, ret; |
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| 138 | |
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[390f749] | 139 | assert(ctx != NULL); assert(path != NULL); |
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[03b3293] | 140 | |
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| 141 | int dirlen = strlen(path); |
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[50b9dc9] | 142 | glob_pat = abac_xmalloc(dirlen + sizeof(ID_PAT)); |
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[03b3293] | 143 | memcpy(glob_pat, path, dirlen); |
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| 144 | |
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| 145 | // first load ID certs |
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| 146 | memcpy(glob_pat + dirlen, ID_PAT, sizeof(ID_PAT)); |
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[50b9dc9] | 147 | glob(glob_pat, GLOB_BRACE, NULL, &glob_buf); // TODO check for error |
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[03b3293] | 148 | for (i = 0; i < glob_buf.gl_pathc; ++i) { |
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| 149 | char *cert_file = glob_buf.gl_pathv[i]; |
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| 150 | |
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[390f749] | 151 | ret = abac_context_load_id_file(ctx, cert_file); |
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[0779c99] | 152 | if (ret != ABAC_CERT_SUCCESS) |
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[50b9dc9] | 153 | warnx("Couldn't load ID cert %s", cert_file); |
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[03b3293] | 154 | } |
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| 155 | globfree(&glob_buf); |
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| 156 | |
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| 157 | // then load attr certs |
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| 158 | memcpy(glob_pat + dirlen, ATTR_PAT, sizeof(ATTR_PAT)); |
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| 159 | glob(glob_pat, 0, NULL, &glob_buf); // TODO check for error |
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| 160 | for (i = 0; i < glob_buf.gl_pathc; ++i) { |
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| 161 | char *cert_file = glob_buf.gl_pathv[i]; |
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| 162 | |
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[390f749] | 163 | ret = abac_context_load_attribute_file(ctx, cert_file); |
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[0779c99] | 164 | if (ret != ABAC_CERT_SUCCESS) |
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[50b9dc9] | 165 | warnx("Couldn't load attribute cert %s", cert_file); |
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[03b3293] | 166 | } |
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| 167 | globfree(&glob_buf); |
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| 168 | |
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| 169 | free(glob_pat); |
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| 170 | } |
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| 171 | |
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[90d20f0] | 172 | /** |
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[dc62c68] | 173 | * Run a query on the data in an abac context. Returns a NULL-terminated array |
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[38782df] | 174 | * of abac_credential_t. Success/failure in *success. |
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[90d20f0] | 175 | */ |
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[4e426c9] | 176 | abac_credential_t **abac_context_query(abac_context_t *ctx, char *role, char *principal, int *success) { |
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[401a054] | 177 | abac_credential_t **credentials = NULL, *cur; |
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[dc62c68] | 178 | int i = 0; |
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| 179 | |
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[4e426c9] | 180 | assert(ctx != NULL); assert(role != NULL); assert(principal != NULL); assert(success != NULL); |
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[90d20f0] | 181 | |
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[390f749] | 182 | abac_graph_t *result_graph = abac_graph_query(ctx->graph, role, principal); |
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[401a054] | 183 | abac_list_t *result = abac_graph_credentials(result_graph); |
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[90d20f0] | 184 | |
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[06293d1] | 185 | abac_graph_free(result_graph); |
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[90d20f0] | 186 | |
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[6d5623e] | 187 | int size = abac_list_size(result); |
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[4e426c9] | 188 | if (size > 0) |
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| 189 | *success = 1; |
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| 190 | |
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| 191 | // if there is no actual path, return everything that can reach the role |
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| 192 | else { |
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| 193 | *success = 0; |
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| 194 | abac_list_free(result); |
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| 195 | |
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[e9e28b7] | 196 | // TODO: fix this when we can return a sane value for partial proofs |
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| 197 | // result = abac_graph_postorder_credentials(ctx->graph, role); |
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| 198 | result = abac_graph_credentials(ctx->graph); |
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[4e426c9] | 199 | size = abac_list_size(result); |
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| 200 | } |
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| 201 | |
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[38782df] | 202 | // make the array (leave space to NULL terminate it) |
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| 203 | // n.b., even if the list is empty, we still return an array that |
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| 204 | // only contains the NULL terminator |
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| 205 | credentials = abac_xmalloc(sizeof(abac_credential_t *) * (size + 1)); |
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| 206 | abac_list_foreach(result, cur, |
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| 207 | credentials[i++] = cur; |
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| 208 | ); |
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| 209 | credentials[i] = NULL; |
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[dc62c68] | 210 | |
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[6d5623e] | 211 | abac_list_free(result); |
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[dc62c68] | 212 | |
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[401a054] | 213 | return credentials; |
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[90d20f0] | 214 | } |
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| 215 | |
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| 216 | /** |
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[3c4fd68] | 217 | * A NULL-terminated array of all the credentials in the context. |
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[90d20f0] | 218 | */ |
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[3c4fd68] | 219 | abac_credential_t **abac_context_credentials(abac_context_t *ctx) { |
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| 220 | abac_credential_t *cred; |
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| 221 | int i = 0; |
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| 222 | |
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| 223 | assert(ctx != NULL); |
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| 224 | |
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| 225 | abac_list_t *cred_list = abac_graph_credentials(ctx->graph); |
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| 226 | int size = abac_list_size(cred_list); |
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| 227 | |
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| 228 | abac_credential_t **credentials = abac_xmalloc(sizeof(abac_credential_t *) * (size + 1)); |
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| 229 | abac_list_foreach(cred_list, cred, |
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| 230 | credentials[i++] = cred; |
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| 231 | ); |
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| 232 | credentials[i] = NULL; |
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| 233 | |
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| 234 | abac_list_free(cred_list); |
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| 235 | |
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| 236 | return credentials; |
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| 237 | } |
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| 238 | |
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| 239 | /** |
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| 240 | * Frees a NULL-terminated list of credentials. |
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| 241 | */ |
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| 242 | void abac_context_credentials_free(abac_credential_t **credentials) { |
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[dc62c68] | 243 | int i; |
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[90d20f0] | 244 | |
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[401a054] | 245 | if (credentials == NULL) |
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[90d20f0] | 246 | return; |
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| 247 | |
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[401a054] | 248 | for (i = 0; credentials[i] != NULL; ++i) |
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| 249 | abac_credential_free(credentials[i]); |
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| 250 | free(credentials); |
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[90d20f0] | 251 | } |
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