1 | /** |
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2 | ** abac_verifier.c |
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3 | **/ |
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4 | |
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5 | // include the GNU extension of asprintf |
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6 | #define _GNU_SOURCE |
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7 | |
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8 | #include <assert.h> |
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9 | #include <stdio.h> |
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10 | |
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11 | #include <library.h> |
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12 | |
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13 | #include "abac_internal.h" |
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14 | #include "abac_verifier.h" |
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15 | |
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16 | #include "abac_util.h" |
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17 | #include "abac_rt.h" |
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18 | |
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19 | static int debug=0; |
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20 | |
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21 | extern abac_aspect_t *abac_yy_get_rule_head_aspect(); |
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22 | extern abac_aspect_t *abac_yy_get_rule_tail_aspect(); |
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23 | extern abac_list_t *abac_yy_get_rule_clauses(); |
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24 | extern char* abac_decode_string(char *); |
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25 | extern void abac_yy_free_rule_clauses(); |
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26 | extern char *generate_pl_type_clause(char *, int); |
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27 | |
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28 | extern void abac_print_aspect_string_with_condition(abac_aspect_t *role, FILE*); |
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29 | |
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30 | struct _abac_id_credential_t { |
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31 | char *hashkeyid; |
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32 | abac_id_t *id; |
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33 | char *pl_clause; |
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34 | |
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35 | UT_hash_handle hh; |
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36 | }; |
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37 | /* hash table base on sha with a p */ |
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38 | abac_id_credential_t *id_creds = NULL; |
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39 | |
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40 | /* can store either role or oset */ |
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41 | struct _abac_credential_t { |
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42 | char *hashkeyid; |
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43 | abac_attribute_t *attr; |
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44 | abac_list_t *pl_clauses; |
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45 | |
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46 | UT_hash_handle hh; |
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47 | }; |
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48 | /* hash table base on encoded attr rule */ |
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49 | abac_credential_t *attr_creds = NULL; |
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50 | /* linked list of all the attr's hashkeyid */ |
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51 | abac_list_t *attr_hashkeyid_list = NULL; |
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52 | |
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53 | /*****************************************************************************/ |
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54 | void abac_print_cred_info(abac_credential_t *cred, FILE *fp) |
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55 | { |
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56 | if(fp == NULL) |
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57 | fp=stdout; |
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58 | |
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59 | abac_attribute_t *ptr=cred->attr; |
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60 | abac_aspect_t *head=abac_attribute_head(ptr); |
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61 | abac_aspect_t *tail=abac_attribute_tail(ptr); |
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62 | |
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63 | if(debug) { |
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64 | fprintf(fp,"---> printing out credential info cred(%d)..\n", (int) cred); |
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65 | if(head) { |
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66 | abac_print_aspect_string_with_condition(head,fp); |
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67 | } |
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68 | if(tail) { |
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69 | abac_print_aspect_string_with_condition(tail,fp); |
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70 | } |
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71 | |
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72 | abac_list_t *clauses=cred->pl_clauses; |
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73 | if (clauses != NULL) { |
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74 | char *cur=NULL; |
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75 | abac_list_foreach(clauses, cur, |
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76 | fprintf(fp,"\n a clause(%d):\n",(int)cur); |
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77 | if(cur) |
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78 | fprintf(fp,"strlen(%d)loc(%d)(%s)\n", strlen(cur),(int)cur, cur); |
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79 | ); |
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80 | } |
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81 | } else { |
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82 | fprintf(fp," "); |
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83 | abac_print_aspect_string_with_condition(head,fp); |
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84 | fprintf(fp," <- "); |
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85 | abac_print_aspect_string_with_condition(tail,fp); |
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86 | fprintf(fp,"\n"); |
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87 | } |
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88 | } |
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89 | |
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90 | // |
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91 | int abac_verify_idtype_type(char *type) { |
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92 | int i; |
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93 | |
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94 | if (type == NULL) |
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95 | return 0; |
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96 | |
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97 | for (i = 1; i <= _idtypename_cnt ; i++) |
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98 | if(strcmp(type,_idtypename[i])==0) |
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99 | return i; |
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100 | return 0; |
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101 | } |
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102 | |
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103 | char *abac_idtype_string(int i) |
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104 | { |
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105 | if(i > _idtypename_cnt) |
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106 | panic("abac_idtype_string: went out of range on idtypename"); |
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107 | return _idtypename[i]; |
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108 | } |
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109 | |
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110 | // convert a chunk to a lowercase binary string |
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111 | // malloc's the string |
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112 | static char *_chunk_to_string(chunk_t chunk) { |
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113 | int i; |
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114 | |
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115 | char *ret = abac_xmalloc(chunk.len * 2 + 1); |
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116 | |
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117 | for (i = 0; i < chunk.len; ++i) |
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118 | sprintf(ret + 2 * i, "%02x", chunk.ptr[i]); |
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119 | |
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120 | return ret; |
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121 | } |
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122 | |
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123 | // verify that cert was issued by issuer |
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124 | // cert and issuer can be the same, in which case the self-sig is validated |
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125 | static int _verify_signature(certificate_t *issuer_cert, certificate_t *cert) { |
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126 | if (cert->issued_by(cert, issuer_cert)) |
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127 | if (cert->get_validity(cert, NULL, NULL, NULL)) |
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128 | return 1; |
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129 | return 0; |
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130 | } |
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131 | |
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132 | /** |
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133 | * Init the verifier subsystem. |
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134 | */ |
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135 | void abac_verifier_init(void) { |
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136 | // silence all debugging |
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137 | |
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138 | if (!library_init(NULL)) |
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139 | exit(SS_RC_LIBSTRONGSWAN_INTEGRITY); |
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140 | |
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141 | if (!lib->plugins->load(lib->plugins, NULL, |
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142 | lib->settings->get_str(lib->settings, "pki.load", PLUGINS))) |
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143 | exit(SS_RC_INITIALIZATION_FAILED); |
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144 | |
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145 | attr_hashkeyid_list = abac_list_new(); |
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146 | } |
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147 | |
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148 | /** |
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149 | * Uninitialize the system, free up any allocated memory. |
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150 | */ |
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151 | void abac_verifier_deinit(void) { |
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152 | abac_id_credential_t *ptr; |
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153 | while ((ptr = id_creds) != NULL) { |
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154 | HASH_DEL(id_creds, ptr); |
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155 | |
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156 | free(ptr->hashkeyid); |
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157 | free(ptr->pl_clause); |
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158 | abac_id_free(ptr->id); |
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159 | free(ptr); |
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160 | } |
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161 | |
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162 | abac_credential_t *ptr2; |
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163 | while ((ptr2 = attr_creds) != NULL) { |
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164 | HASH_DEL(attr_creds, ptr2); |
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165 | if(debug) { |
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166 | printf("attr_creds -- %s\n",ptr2->hashkeyid); |
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167 | } |
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168 | free(ptr2->hashkeyid); |
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169 | abac_attribute_free(ptr2->attr); |
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170 | char *cur=NULL; |
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171 | abac_list_foreach(ptr2->pl_clauses, cur, |
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172 | free(cur); |
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173 | ); |
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174 | free(ptr2->pl_clauses); |
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175 | free(ptr2); |
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176 | } |
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177 | |
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178 | if(attr_hashkeyid_list) { |
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179 | char *cur; |
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180 | if(attr_hashkeyid_list) { |
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181 | abac_list_foreach(attr_hashkeyid_list, cur, |
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182 | if(cur) free(cur); |
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183 | ); |
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184 | } |
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185 | abac_list_free(attr_hashkeyid_list); |
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186 | } |
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187 | library_deinit(); |
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188 | } |
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189 | |
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190 | abac_id_credential_t *abac_verifier_add_id_credential(abac_id_t *a_id) |
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191 | { |
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192 | abac_id_credential_t *id_cred; |
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193 | char *cn=abac_id_cn(a_id); |
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194 | char *keyid=NULL; |
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195 | asprintf(&keyid,"p%s",abac_id_keyid(a_id)); |
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196 | |
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197 | // add the abac_id to the map of id credentials |
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198 | id_cred = abac_xmalloc(sizeof(abac_id_credential_t)); |
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199 | id_cred->hashkeyid = abac_xstrdup(keyid); |
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200 | id_cred->id=abac_id_dup(a_id); |
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201 | |
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202 | /* special handling here */ |
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203 | if(USE("ABAC_CN")) { |
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204 | id_cred->pl_clause = generate_pl_type_clause(cn, abac_id_idtype(a_id)); |
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205 | } else { |
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206 | id_cred->pl_clause=generate_pl_type_clause(keyid, abac_id_idtype(a_id)); |
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207 | } |
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208 | HASH_ADD_KEYPTR(hh, id_creds, id_cred->hashkeyid, strlen(id_cred->hashkeyid), id_cred); |
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209 | if(debug) |
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210 | printf("-->adding into id_creds, (%s)..cnt(%d)\n", |
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211 | id_cred->hashkeyid, HASH_COUNT(id_creds)); |
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212 | |
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213 | free(keyid); |
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214 | return id_cred; |
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215 | } |
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216 | |
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217 | /** |
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218 | * Load an ID certificate. |
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219 | */ |
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220 | static int _load_id(abac_id_t **a_id,certificate_t *cert, abac_id_credential_t **id_cred_ret) { |
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221 | abac_id_credential_t *id_cred = NULL; |
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222 | char *okeyid, *keyid = NULL; |
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223 | chunk_t id; |
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224 | int ret; |
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225 | x509_t *x509 = (x509_t *)cert; |
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226 | |
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227 | assert(cert != NULL); |
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228 | |
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229 | // get the key ID, add p to keyid SHA here */ |
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230 | id = x509->get_subjectKeyIdentifier(x509); |
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231 | okeyid = _chunk_to_string(id); |
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232 | asprintf(&keyid,"p%s",okeyid); |
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233 | |
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234 | /* Mike said this is the way it is */ |
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235 | char *str; |
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236 | int rv = asprintf(&str, "%Y", cert->get_issuer(cert)); |
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237 | |
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238 | /* add p to cn name here */ |
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239 | char *cn=(char *)abac_xmalloc(strlen(str)+2); |
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240 | cn[0]='p'; |
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241 | int n=sscanf(str,"CN=%s", &(cn[1])); |
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242 | if ( n!=1 ) { |
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243 | ret = ABAC_CERT_BAD_CN; |
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244 | goto error; |
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245 | } |
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246 | |
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247 | if(debug) { |
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248 | printf ("DEBUG:keyid %s \n", keyid); |
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249 | printf( "DEBUG:issuer '%s' \n", str); |
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250 | printf ("DEBUG:cn %s \n", cn); |
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251 | } |
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252 | free(str); |
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253 | |
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254 | // if we already have this cert 'error' with success |
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255 | HASH_FIND_STR(id_creds, keyid, id_cred); |
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256 | if (id_cred != NULL) { |
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257 | ret = ABAC_CERT_SUCCESS; |
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258 | goto error; |
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259 | } |
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260 | |
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261 | // validate sig |
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262 | ret = _verify_signature(cert, cert); |
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263 | if (!ret) { |
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264 | ret = ABAC_CERT_BAD_SIG; |
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265 | goto error; |
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266 | } |
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267 | |
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268 | // success, add a new abac_id |
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269 | if(*a_id ==NULL) |
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270 | *a_id = abac_id_keyid_new(okeyid,cn,cert); |
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271 | |
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272 | abac_id_credential_t *n_id_cred=abac_verifier_add_id_credential(*a_id); |
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273 | *id_cred_ret=n_id_cred; |
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274 | |
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275 | return ABAC_CERT_SUCCESS; |
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276 | |
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277 | error: |
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278 | if (keyid != NULL) free(keyid); |
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279 | if (cn != NULL) free(cn); |
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280 | |
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281 | return ret; |
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282 | } |
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283 | |
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284 | /* collect all the creds stored so far */ |
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285 | abac_stack_t *abac_verifier_dump_creds() |
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286 | { |
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287 | abac_stack_t *cred_list = abac_stack_new(); |
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288 | |
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289 | int cnt=0; |
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290 | if(attr_hashkeyid_list) { |
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291 | char *keyid; |
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292 | abac_credential_t *cred; |
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293 | abac_list_foreach(attr_hashkeyid_list, keyid, |
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294 | cred=abac_credential_lookup(keyid); |
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295 | abac_stack_push(cred_list, cred); |
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296 | cnt++; |
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297 | ); |
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298 | } |
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299 | return cred_list; |
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300 | } |
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301 | |
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302 | |
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303 | static void check_id_cred(abac_id_credential_t *id_cred) |
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304 | { |
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305 | if(id_cred) { |
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306 | printf("checking on this id_cred location %d\n", (int)id_cred); |
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307 | printf(" --> sha is (%s)\n", abac_id_keyid(id_cred->id)); |
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308 | printf(" --> cn is (%s)\n", abac_id_cn(id_cred->id)); |
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309 | } |
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310 | } |
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311 | |
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312 | /** |
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313 | * Load an attribute cert as string. |
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314 | * have minimum syntax & validity check |
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315 | */ |
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316 | static int _load_attribute_string(char* attr_string) { |
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317 | printf("NOT implemented yet!!!"); |
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318 | return ABAC_CERT_INVALID; |
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319 | } |
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320 | |
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321 | /** |
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322 | * Load an ID cert from a file. |
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323 | */ |
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324 | int abac_verifier_load_id_file(char *filename, abac_id_credential_t **id_cred_ret) { |
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325 | abac_id_t *id=NULL; |
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326 | if (lib == NULL) |
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327 | errx(1, "looks like you didn't call libabac_init() (lib is NULL)"); |
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328 | |
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329 | // load the cert |
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330 | certificate_t *cert = lib->creds->create( |
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331 | lib->creds, CRED_CERTIFICATE, CERT_X509, |
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332 | BUILD_FROM_FILE, filename, |
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333 | BUILD_X509_FLAG, X509_AA, // attribute authority, dumb |
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334 | BUILD_END |
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335 | ); |
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336 | if (cert == NULL) |
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337 | return ABAC_CERT_INVALID; |
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338 | return _load_id(&id,cert,id_cred_ret); |
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339 | } |
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340 | |
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341 | /** |
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342 | * Load an ID cert from a abac_id_t |
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343 | */ |
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344 | int abac_verifier_load_id_id(abac_id_t *id, abac_id_credential_t **id_cred_ret) { |
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345 | certificate_t *cert = abac_id_cert(id); |
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346 | return _load_id(&id,cert,id_cred_ret); |
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347 | } |
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348 | |
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349 | /** |
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350 | * Load an ID cert from a chunk. |
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351 | */ |
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352 | int abac_verifier_load_id_chunk(chunk_t chunk, abac_id_credential_t **id_cred_ret) { |
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353 | abac_id_t *id=NULL; |
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354 | // load the cert |
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355 | certificate_t *cert = lib->creds->create( |
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356 | lib->creds, CRED_CERTIFICATE, CERT_X509, |
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357 | BUILD_BLOB_ASN1_DER, chunk, |
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358 | BUILD_X509_FLAG, X509_AA, // attribute authority, dumb |
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359 | BUILD_END |
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360 | ); |
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361 | if (cert == NULL) |
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362 | return ABAC_CERT_INVALID; |
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363 | return _load_id(&id, cert,id_cred_ret); |
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364 | } |
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365 | |
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366 | |
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367 | void abac_print_clauses(abac_list_t *clauses, FILE *fp) |
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368 | { |
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369 | if (clauses != NULL) { |
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370 | char *cur; |
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371 | printf("total-- %d clauses\n", abac_list_size(clauses)); |
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372 | abac_list_foreach(clauses, cur, |
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373 | if(cur) { |
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374 | if(fp) |
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375 | fprintf (fp,"a clause, %d(%s)\n", (int)cur,cur); |
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376 | else printf ("a clause, %d(%s)\n", (int)cur,cur); |
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377 | } |
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378 | ); |
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379 | } |
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380 | } |
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381 | |
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382 | abac_id_credential_t *abac_id_credential_dup(abac_id_credential_t *ptr) { |
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383 | assert(ptr != NULL); |
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384 | abac_id_dup(ptr->id); |
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385 | return ptr; |
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386 | } |
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387 | |
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388 | abac_id_t *abac_id_credential_id(abac_id_credential_t *ptr) |
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389 | { |
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390 | assert(ptr); |
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391 | return ptr->id; |
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392 | } |
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393 | |
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394 | |
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395 | abac_id_credential_t *abac_id_credential_lookup(char *pname) |
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396 | { |
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397 | abac_id_credential_t *id_cred=NULL; |
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398 | HASH_FIND_STR(id_creds, pname, id_cred); |
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399 | return id_cred; |
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400 | } |
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401 | |
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402 | void abac_id_credential_free(abac_id_credential_t *ptr) |
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403 | { |
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404 | if (ptr == NULL) |
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405 | return; |
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406 | |
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407 | // this is very hacky... |
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408 | int last=abac_id_lastone(ptr->id); |
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409 | if(!last) { |
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410 | abac_id_free(ptr->id); |
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411 | } else { |
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412 | free(ptr->hashkeyid); |
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413 | if(ptr->pl_clause) |
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414 | free(ptr->pl_clause); |
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415 | abac_id_free(ptr->id); |
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416 | HASH_DEL(id_creds, ptr); |
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417 | free(ptr); |
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418 | } |
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419 | } |
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420 | |
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421 | /****************************************************************************/ |
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422 | |
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423 | static int _verify_valid_credential(certificate_t *cert, |
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424 | abac_credential_t **cred_ret, char *encoded_attr_string) |
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425 | { |
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426 | abac_aspect_t *head_aspect = NULL; |
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427 | abac_aspect_t *tail_aspect = NULL; |
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428 | abac_list_t *clauses=NULL; |
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429 | abac_id_credential_t *id_cred; |
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430 | abac_id_t *issuer_id; |
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431 | int ret, i; |
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432 | |
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433 | // get the attr |
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434 | head_aspect = abac_yy_get_rule_head_aspect(); |
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435 | tail_aspect = abac_yy_get_rule_tail_aspect(); |
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436 | clauses = abac_yy_get_rule_clauses(); |
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437 | |
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438 | // get the issuer based on keyid |
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439 | char *principalname = abac_aspect_principal_principalname(head_aspect); |
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440 | if(debug) printf("LOOKING for %s\n", principalname); |
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441 | |
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442 | HASH_FIND_STR(id_creds, principalname, id_cred); |
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443 | issuer_id=id_cred->id; |
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444 | if (issuer_id == NULL) { |
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445 | ret = ABAC_CERT_MISSING_ISSUER; |
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446 | if(debug) |
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447 | printf("can not find %s in id_creds\n", principalname); |
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448 | goto error; |
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449 | } |
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450 | |
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451 | |
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452 | // make sure the issuer's signed it |
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453 | ret = _verify_signature(abac_id_cert(issuer_id), cert); |
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454 | if (!ret) { |
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455 | abac_yy_set_error_code(ABAC_RT_CERT_BAD_SIG); |
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456 | goto error; |
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457 | } |
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458 | |
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459 | // at this point we know we have a good attribute cert baked it in |
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460 | abac_attribute_t *attr=abac_attribute_new(issuer_id, cert, cert->get_ref(cert)); |
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461 | abac_attribute_set_head(attr, head_aspect); |
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462 | abac_attribute_add_tail(attr, tail_aspect); |
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463 | |
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464 | abac_credential_t *cred = abac_xmalloc(sizeof(abac_credential_t)); |
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465 | cred->hashkeyid=abac_xstrdup(encoded_attr_string); |
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466 | cred->attr=attr; |
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467 | cred->pl_clauses = clauses; |
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468 | *cred_ret = cred; |
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469 | |
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470 | // success, add the key to the map of certificates |
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471 | HASH_ADD_KEYPTR(hh, attr_creds, cred->hashkeyid, strlen(cred->hashkeyid), cred); |
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472 | |
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473 | assert(attr_hashkeyid_list); |
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474 | abac_list_add(attr_hashkeyid_list, abac_xstrdup(cred->hashkeyid)); |
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475 | return ABAC_CERT_SUCCESS; |
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476 | |
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477 | error: |
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478 | if (head_aspect) abac_aspect_free(head_aspect); |
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479 | if (tail_aspect) abac_aspect_free(tail_aspect); |
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480 | abac_yy_free_rule_clauses(); |
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481 | |
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482 | return ret; |
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483 | } |
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484 | |
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485 | /** |
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486 | * Load an attribute cert. |
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487 | * Returns true only if the certificate is valid and is issued by the proper |
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488 | * authority. |
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489 | */ |
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490 | static int _load_attribute_cert(certificate_t *cert, abac_credential_t **cred_ret) { |
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491 | ietf_attributes_t *attr_cert = NULL; |
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492 | abac_id_credential_t *issuer; |
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493 | int ret, i; |
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494 | |
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495 | // get the attr |
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496 | ac_t *ac = (ac_t *)cert; |
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497 | attr_cert = ac->get_groups(ac); |
---|
498 | if (attr_cert == NULL) { |
---|
499 | ret = ABAC_CERT_INVALID; |
---|
500 | goto error; |
---|
501 | } |
---|
502 | |
---|
503 | char *encoded_attr_string=attr_cert->get_string(attr_cert); |
---|
504 | char *attr_string = abac_decode_string(encoded_attr_string); |
---|
505 | if(debug) |
---|
506 | printf("string to be yyparse..(%s)\n",attr_string); |
---|
507 | |
---|
508 | if (attr_string == NULL) { |
---|
509 | ret = ABAC_CERT_INVALID; |
---|
510 | goto error; |
---|
511 | } |
---|
512 | |
---|
513 | /* call into yacc parser */ |
---|
514 | abac_reset_yyfptr(attr_string); |
---|
515 | abac_yy_init(); |
---|
516 | int rc=yyparse(); |
---|
517 | if (rc) { |
---|
518 | ret = ABAC_CERT_INVALID; |
---|
519 | goto error; |
---|
520 | } |
---|
521 | |
---|
522 | ret=_verify_valid_credential(cert,cred_ret,encoded_attr_string); |
---|
523 | |
---|
524 | // free up some crap |
---|
525 | attr_cert->destroy(attr_cert); |
---|
526 | |
---|
527 | return ABAC_CERT_SUCCESS; |
---|
528 | |
---|
529 | error: |
---|
530 | if (cert) cert->destroy(cert); |
---|
531 | if (attr_cert) attr_cert->destroy(attr_cert); |
---|
532 | return ret; |
---|
533 | } |
---|
534 | |
---|
535 | /** |
---|
536 | * Load an attribute cert from a abac_attribute_t. |
---|
537 | */ |
---|
538 | int abac_verifier_load_attribute_cert_attribute(abac_attribute_t *attr, abac_credential_t **cred) { |
---|
539 | // load the cert |
---|
540 | certificate_t *cert = abac_attribute_cert(attr); |
---|
541 | if (cert == NULL) |
---|
542 | return ABAC_CERT_INVALID; |
---|
543 | |
---|
544 | // XXX need to skip the parsing part |
---|
545 | return _load_attribute_cert(cert, cred); |
---|
546 | } |
---|
547 | |
---|
548 | /** |
---|
549 | * Load an attribute cert from a file. |
---|
550 | */ |
---|
551 | int abac_verifier_load_attribute_cert_file(char *filename, abac_credential_t **cred) { |
---|
552 | // load the cert |
---|
553 | certificate_t *cert = lib->creds->create( |
---|
554 | lib->creds, CRED_CERTIFICATE, CERT_X509_AC, |
---|
555 | BUILD_FROM_FILE, filename, |
---|
556 | BUILD_END |
---|
557 | ); |
---|
558 | if (cert == NULL) |
---|
559 | return ABAC_CERT_INVALID; |
---|
560 | return _load_attribute_cert(cert, cred); |
---|
561 | } |
---|
562 | |
---|
563 | /** |
---|
564 | * Load an attribute cert from a chunk. |
---|
565 | */ |
---|
566 | int abac_verifier_load_attribute_cert_chunk(chunk_t chunk, abac_credential_t **cred) { |
---|
567 | // load the cert |
---|
568 | certificate_t *cert = lib->creds->create( |
---|
569 | lib->creds, CRED_CERTIFICATE, CERT_X509_AC, |
---|
570 | BUILD_BLOB_ASN1_DER, chunk, |
---|
571 | BUILD_END |
---|
572 | ); |
---|
573 | if (cert == NULL) |
---|
574 | return ABAC_CERT_INVALID; |
---|
575 | return _load_attribute_cert(cert, cred); |
---|
576 | } |
---|
577 | |
---|
578 | /** |
---|
579 | * Return the encoding of the attribute cert. |
---|
580 | */ |
---|
581 | abac_chunk_t abac_credential_attribute_cert(abac_credential_t *cred) { |
---|
582 | abac_attribute_t *ptr=cred->attr; |
---|
583 | certificate_t *cert=abac_attribute_cert(ptr); |
---|
584 | chunk_t encoding = cert->get_encoding(cert); |
---|
585 | abac_chunk_t ret = { encoding.ptr, encoding.len }; |
---|
586 | return ret; |
---|
587 | } |
---|
588 | |
---|
589 | /** |
---|
590 | * Return the encoding of the issuer cert. |
---|
591 | */ |
---|
592 | abac_chunk_t abac_credential_issuer_cert(abac_credential_t *cred) { |
---|
593 | certificate_t *issuer_cert=abac_attribute_issuer_cert(cred->attr); |
---|
594 | assert(issuer_cert); |
---|
595 | chunk_t encoding = issuer_cert->get_encoding(issuer_cert); |
---|
596 | abac_chunk_t ret = { encoding.ptr, encoding.len }; |
---|
597 | return ret; |
---|
598 | } |
---|
599 | |
---|
600 | /** |
---|
601 | * Return the clause of the cert |
---|
602 | */ |
---|
603 | abac_list_t *abac_credential_clauses(abac_credential_t *cred) { |
---|
604 | return cred->pl_clauses; |
---|
605 | } |
---|
606 | |
---|
607 | abac_attribute_t *abac_credential_attribute(abac_credential_t *cred) { |
---|
608 | assert(cred); |
---|
609 | return cred->attr; |
---|
610 | } |
---|
611 | |
---|
612 | /** |
---|
613 | * Increase the ref count of a credential. |
---|
614 | */ |
---|
615 | abac_credential_t *abac_credential_dup(abac_credential_t *cred) { |
---|
616 | assert(cred != NULL); |
---|
617 | |
---|
618 | abac_attribute_dup(cred->attr); |
---|
619 | return cred; |
---|
620 | } |
---|
621 | |
---|
622 | /** |
---|
623 | * lookup for a credential. |
---|
624 | */ |
---|
625 | abac_credential_t *abac_credential_lookup(char* cred_string) |
---|
626 | { |
---|
627 | if(debug) |
---|
628 | printf("abac_credential_lookup: looking for (%s)\n", cred_string); |
---|
629 | abac_credential_t *attr_cred; |
---|
630 | HASH_FIND_STR(attr_creds, cred_string, attr_cred); |
---|
631 | if (attr_cred == NULL) { |
---|
632 | if(debug) printf("DEBUG:NOT FOUND..\n"); |
---|
633 | return NULL; |
---|
634 | } |
---|
635 | abac_credential_t *rt=abac_credential_dup(attr_cred); |
---|
636 | if(debug) printf("DEBUG:FOUND.. (%d) returning, (%d)\n", (int)attr_cred, (int) rt); |
---|
637 | return rt; |
---|
638 | } |
---|
639 | |
---|
640 | /** |
---|
641 | * Decrease the reference count of a credential, freeing it when it reaches 0. |
---|
642 | */ |
---|
643 | void abac_credential_free(abac_credential_t *cred) |
---|
644 | { |
---|
645 | if(debug) |
---|
646 | printf("abac_credential_free:freeing cred(%d)clause(%d)\n", (int)cred, (int)cred->pl_clauses); |
---|
647 | |
---|
648 | if (cred == NULL) |
---|
649 | return; |
---|
650 | |
---|
651 | // this is very hacky... |
---|
652 | int last=abac_attribute_lastone(cred->attr); |
---|
653 | if(!last) { |
---|
654 | abac_attribute_free(cred->attr); |
---|
655 | } else { |
---|
656 | free(cred->hashkeyid); |
---|
657 | char *cur=NULL; |
---|
658 | abac_list_foreach(cred->pl_clauses, cur, |
---|
659 | free(cur); |
---|
660 | ); |
---|
661 | abac_attribute_free(cred->attr); |
---|
662 | HASH_DEL(attr_creds, cred); |
---|
663 | free(cred); |
---|
664 | } |
---|
665 | } |
---|
666 | |
---|
667 | char *abac_id_clause(abac_id_credential_t *id_cred) |
---|
668 | { |
---|
669 | if(id_cred) |
---|
670 | return id_cred->pl_clause; |
---|
671 | return NULL; |
---|
672 | } |
---|
673 | |
---|
674 | /* retrieve the cn that is associated with this sha_string */ |
---|
675 | char *abac_cn_with_sha(char *sha_string) { |
---|
676 | |
---|
677 | // get the issuer based on keyid |
---|
678 | abac_id_credential_t *id_cred; |
---|
679 | HASH_FIND_STR(id_creds, sha_string, id_cred); |
---|
680 | if (id_cred == NULL) { |
---|
681 | return NULL; |
---|
682 | } |
---|
683 | if(debug) |
---|
684 | check_id_cred(id_cred); |
---|
685 | return abac_id_cn(id_cred->id); |
---|
686 | } |
---|
687 | |
---|
688 | char *abac_idtype_with_sha(char* sha_string) |
---|
689 | { |
---|
690 | // get the issuer based on keyid |
---|
691 | abac_id_credential_t *id_cred; |
---|
692 | HASH_FIND_STR(id_creds, sha_string, id_cred); |
---|
693 | if (id_cred == NULL) { |
---|
694 | return NULL; |
---|
695 | } |
---|
696 | int idtype=abac_id_idtype(id_cred->id); |
---|
697 | |
---|
698 | return abac_idtype_string(idtype); |
---|
699 | } |
---|
700 | |
---|
701 | abac_aspect_t *abac_credential_head(abac_credential_t *cred) { |
---|
702 | return abac_attribute_head(cred->attr); |
---|
703 | } |
---|
704 | |
---|
705 | abac_aspect_t *abac_credential_tail(abac_credential_t *cred) { |
---|
706 | return abac_attribute_tail(cred->attr); |
---|
707 | } |
---|
708 | |
---|
709 | |
---|