[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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| 127 | /** |
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| 128 | * Load an attribute cert from an abac_attribute_t. |
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| 129 | */ |
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| 130 | int abac_context_load_attribute_attribute(abac_context_t *ctx, abac_attribute_t *ptr) |
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| 131 | { |
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| 132 | /* XXX */ |
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| 133 | int ret=0; |
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| 134 | return ret; |
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| 135 | } |
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| 136 | |
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| 137 | /** |
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| 138 | * Load an attribute cert from a file. |
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| 139 | */ |
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| 140 | int abac_context_load_attribute_file(abac_context_t *ctx, char *filename) { |
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| 141 | int ret, add_ret; |
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[5110d42] | 142 | abac_credential_t *cred=NULL; |
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[8bd77b5] | 143 | |
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| 144 | assert(ctx != NULL); assert(filename != NULL); |
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| 145 | |
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| 146 | ret = abac_verifier_load_attribute_cert_file(filename, &cred); |
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| 147 | if (ret == ABAC_CERT_SUCCESS) { |
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| 148 | add_ret = abac_pl_add_credential(ctx->pl, cred); |
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| 149 | assert(add_ret != ABAC_PL_CRED_INVALID); |
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| 150 | } |
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| 151 | |
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| 152 | return ret; |
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| 153 | } |
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| 154 | |
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| 155 | /** |
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| 156 | * Load an attribute cert from a chunk. |
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| 157 | */ |
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| 158 | int abac_context_load_attribute_chunk(abac_context_t *ctx, abac_chunk_t cert) { |
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| 159 | int ret, add_ret; |
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[5110d42] | 160 | abac_credential_t *cred=NULL; |
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[8bd77b5] | 161 | |
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| 162 | assert(ctx != NULL); |
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| 163 | |
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| 164 | chunk_t cert_chunk = { cert.ptr, cert.len }; |
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| 165 | |
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| 166 | ret = abac_verifier_load_attribute_cert_chunk(cert_chunk, &cred); |
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| 167 | if (ret == ABAC_CERT_SUCCESS) { |
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| 168 | add_ret = abac_pl_add_credential(ctx->pl, cred); |
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| 169 | assert(add_ret != ABAC_PL_CRED_INVALID); |
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| 170 | abac_credential_free(cred); |
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| 171 | } |
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| 172 | |
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| 173 | return ret; |
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| 174 | } |
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| 175 | |
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[d037f54] | 176 | #define KEY_PAT "/*_private.{der,pem}" |
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[8bd77b5] | 177 | #define ID_PAT "/*_ID.{der,pem}" |
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| 178 | #define ATTR_PAT "/*_attr.der" |
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[5110d42] | 179 | #define IDKEY_PAT "/*_IDKEY.{der,pem}" |
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[8bd77b5] | 180 | |
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[d037f54] | 181 | char *_make_key_filename(char *cert_file) |
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| 182 | { |
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| 183 | char *p=strstr(cert_file,"_ID."); |
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| 184 | char *head=strndup(cert_file,p-cert_file); |
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| 185 | char *tail=p+4; |
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| 186 | char *keyfile=NULL; |
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| 187 | asprintf(&keyfile,"%s_private.%s",head,tail); |
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| 188 | free(head); |
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| 189 | return keyfile; |
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| 190 | } |
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[8bd77b5] | 191 | /** |
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| 192 | * Load a directory full of certs. |
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| 193 | */ |
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| 194 | void abac_context_load_directory(abac_context_t *ctx, char *path) { |
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[d037f54] | 195 | char *glob_pat, *key_pat; |
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[8bd77b5] | 196 | glob_t glob_buf; |
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| 197 | int i, ret; |
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| 198 | |
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| 199 | assert(ctx != NULL); assert(path != NULL); |
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| 200 | |
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| 201 | int dirlen = strlen(path); |
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[5110d42] | 202 | |
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| 203 | /* make sure pick the larger one */ |
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| 204 | glob_pat = abac_xmalloc(dirlen + sizeof(IDKEY_PAT)); |
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[8bd77b5] | 205 | memcpy(glob_pat, path, dirlen); |
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| 206 | |
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| 207 | // first load ID certs |
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| 208 | memcpy(glob_pat + dirlen, ID_PAT, sizeof(ID_PAT)); |
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| 209 | glob(glob_pat, GLOB_BRACE, NULL, &glob_buf); // TODO check for error |
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| 210 | for (i = 0; i < glob_buf.gl_pathc; ++i) { |
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[d037f54] | 211 | /* blah_ID.pem */ |
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[8bd77b5] | 212 | char *cert_file = glob_buf.gl_pathv[i]; |
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[d037f54] | 213 | /* blah_private.pem */ |
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| 214 | char *key_file=_make_key_filename(cert_file); |
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| 215 | if(debug) { |
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| 216 | printf("--> ID cert... %s\n", cert_file); |
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| 217 | printf("--> KEY cert... %s\n", key_file); |
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| 218 | } |
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[5110d42] | 219 | ret = abac_context_load_id_id_file_key_file(ctx, cert_file, key_file); |
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[8bd77b5] | 220 | if (ret != ABAC_CERT_SUCCESS) |
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| 221 | warnx("Couldn't load ID cert %s", cert_file); |
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| 222 | } |
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| 223 | globfree(&glob_buf); |
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| 224 | |
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[5110d42] | 225 | // first load IDKEY certs |
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| 226 | memcpy(glob_pat + dirlen, IDKEY_PAT, sizeof(IDKEY_PAT)); |
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| 227 | glob(glob_pat, GLOB_BRACE, NULL, &glob_buf); // TODO check for error |
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| 228 | for (i = 0; i < glob_buf.gl_pathc; ++i) { |
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| 229 | /* blah_IDKEY.pem */ |
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| 230 | char *certkey_file = glob_buf.gl_pathv[i]; |
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| 231 | if(debug) { |
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| 232 | printf("--> IDKEY certkey... %s\n", certkey_file); |
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| 233 | } |
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| 234 | ret = abac_context_load_id_idkey_file(ctx, certkey_file); |
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| 235 | if (ret != ABAC_CERT_SUCCESS) |
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| 236 | warnx("Couldn't load ID/KEY IDKEY cert %s", certkey_file); |
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| 237 | } |
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| 238 | globfree(&glob_buf); |
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| 239 | |
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[8bd77b5] | 240 | memcpy(glob_pat + dirlen, ATTR_PAT, sizeof(ATTR_PAT)); |
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| 241 | glob(glob_pat, 0, NULL, &glob_buf); // TODO check for error |
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| 242 | for (i = 0; i < glob_buf.gl_pathc; ++i) { |
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| 243 | char *cert_file = glob_buf.gl_pathv[i]; |
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| 244 | |
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| 245 | if(debug) printf("--> attr file... %s\n", cert_file); |
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| 246 | ret = abac_context_load_attribute_file(ctx, cert_file); |
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| 247 | if (ret != ABAC_CERT_SUCCESS) |
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| 248 | warnx("Couldn't load attribute cert %s", cert_file); |
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[5110d42] | 249 | if(debug) printf("Loaded.. %s\n", cert_file); |
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[8bd77b5] | 250 | } |
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| 251 | globfree(&glob_buf); |
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| 252 | |
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| 253 | free(glob_pat); |
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| 254 | } |
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| 255 | |
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| 256 | /** |
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| 257 | * Run a query on the data in an abac context. Returns a NULL-terminated array |
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| 258 | * of abac_credential_t. Success/failure in *success. |
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| 259 | * queryfor(either role or oset), with(either keyid or object type) |
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| 260 | */ |
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| 261 | abac_credential_t **abac_context_query(abac_context_t *ctx, char *queryfor, char *with, int *success) { |
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| 262 | if(debug) { |
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| 263 | printf("abac_context_query about(%s) with(%s)\n", queryfor, with); |
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| 264 | } |
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| 265 | abac_credential_t **credentials = NULL, *cur; |
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| 266 | assert(ctx != NULL); assert(queryfor != NULL); |
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| 267 | assert(with != NULL); assert(success != NULL); |
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| 268 | |
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| 269 | abac_stack_t *result = abac_pl_query(ctx->pl, queryfor, with); |
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| 270 | |
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| 271 | int size = abac_stack_size(result); |
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| 272 | if (size > 0) { |
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| 273 | *success = 1; |
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| 274 | } else { |
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| 275 | // XXX NOT SURE YET.. |
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| 276 | // return partial proof |
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| 277 | *success = 0; |
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| 278 | } |
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| 279 | |
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| 280 | // make the array (leave space to NULL terminate it) |
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| 281 | // n.b., even if the list is empty, we still return an array that |
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| 282 | // only contains the NULL terminator |
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| 283 | credentials = abac_xmalloc(sizeof(abac_credential_t *) * (size + 1)); |
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| 284 | int i = 0; |
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| 285 | if(size) { |
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| 286 | while(i<size) { |
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| 287 | cur=(abac_credential_t *) abac_stack_pop(result); |
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| 288 | credentials[i++] = cur; |
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| 289 | } |
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| 290 | } |
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| 291 | credentials[i] = NULL; |
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| 292 | |
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| 293 | if(result) |
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| 294 | abac_stack_free(result); |
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| 295 | |
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| 296 | return credentials; |
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| 297 | } |
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| 298 | |
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| 299 | /** |
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| 300 | * A NULL-terminated array of all the credentials in the context. |
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| 301 | */ |
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| 302 | abac_credential_t **abac_context_credentials(abac_context_t *ctx) { |
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| 303 | abac_credential_t **credentials = NULL, *cur; |
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| 304 | assert(ctx != NULL); |
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| 305 | |
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| 306 | abac_stack_t *result = abac_pl_credentials(ctx->pl); |
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| 307 | int size = abac_stack_size(result); |
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| 308 | |
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| 309 | // make the array (leave space to NULL terminate it) |
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| 310 | // n.b., even if the list is empty, we still return an array that |
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| 311 | // only contains the NULL terminator |
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| 312 | credentials = abac_xmalloc(sizeof(abac_credential_t *) * (size + 1)); |
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| 313 | int i = 0; |
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| 314 | if(size) { |
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| 315 | while(i<size) { |
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| 316 | cur=(abac_credential_t *) abac_stack_pop(result); |
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| 317 | /* if not in there yet, add into it */ |
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| 318 | credentials[i++] = cur; |
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| 319 | } |
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| 320 | } |
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| 321 | credentials[i] = NULL; |
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| 322 | |
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| 323 | if(result) |
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| 324 | abac_stack_free(result); |
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| 325 | return credentials; |
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| 326 | } |
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| 327 | |
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| 328 | /** |
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| 329 | * Frees a NULL-terminated list of credentials. |
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| 330 | */ |
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| 331 | void abac_context_credentials_free(abac_credential_t **credentials) { |
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| 332 | int i; |
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| 333 | |
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| 334 | if (credentials == NULL) |
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| 335 | return; |
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| 336 | |
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| 337 | for (i = 0; credentials[i] != NULL; ++i) |
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| 338 | abac_credential_free(credentials[i]); |
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| 339 | free(credentials); |
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| 340 | } |
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| 341 | |
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[5110d42] | 342 | /** |
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| 343 | * A NULL-terminated array of all the principals in the context. |
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| 344 | */ |
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| 345 | abac_id_credential_t **abac_context_principals(abac_context_t *ctx) { |
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| 346 | abac_id_credential_t **principals = NULL, *cur; |
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| 347 | assert(ctx != NULL); |
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| 348 | |
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| 349 | abac_stack_t *result = abac_pl_principals(ctx->pl); |
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| 350 | |
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| 351 | int size = abac_stack_size(result); |
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| 352 | |
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| 353 | // make the array (leave space to NULL terminate it) |
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| 354 | // n.b., even if the list is empty, we still return an array that |
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| 355 | // only contains the NULL terminator |
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| 356 | principals = abac_xmalloc(sizeof(abac_id_credential_t *) * (size + 1)); |
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| 357 | int i = 0; |
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| 358 | if(size) { |
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| 359 | while(i<size) { |
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| 360 | cur=(abac_id_credential_t *) abac_stack_pop(result); |
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| 361 | /* if not in there yet, add into it */ |
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| 362 | principals[i++] = cur; |
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| 363 | } |
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| 364 | } |
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| 365 | principals[i] = NULL; |
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| 366 | |
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| 367 | if(result) |
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| 368 | abac_stack_free(result); |
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| 369 | return principals; |
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| 370 | } |
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| 371 | |
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| 372 | /** |
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| 373 | * Frees a NULL-terminated list of principals. |
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| 374 | */ |
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| 375 | void abac_context_principals_free(abac_id_credential_t **principals) { |
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| 376 | int i; |
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| 377 | |
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| 378 | if (principals == NULL) |
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| 379 | return; |
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| 380 | |
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| 381 | for (i = 0; principals[i] != NULL; ++i) |
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| 382 | abac_id_credential_free(principals[i]); |
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| 383 | free(principals); |
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| 384 | } |
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| 385 | |
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