1 | |
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2 | // include the GNU extension of asprintf |
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3 | #define _GNU_SOURCE |
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4 | |
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5 | #include <assert.h> |
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6 | #include <stdio.h> |
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7 | |
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8 | #include <library.h> |
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9 | #include <credentials/certificates/certificate.h> |
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10 | #include <credentials/certificates/x509.h> |
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11 | #include <credentials/certificates/ac.h> |
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12 | |
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13 | #include "abac_verifier.h" |
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14 | |
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15 | #include "abac_list.h" |
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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 | extern abac_role_t *abac_yy_get_rule_head_role(); |
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20 | extern abac_role_t *abac_yy_get_rule_tail_role(); |
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21 | extern abac_oset_t *abac_yy_get_rule_head_oset(); |
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22 | extern abac_oset_t *abac_yy_get_rule_tail_oset(); |
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23 | extern int abac_yy_get_rule_is_oset(); |
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24 | extern abac_list_t *abac_yy_get_rule_clauses(); |
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25 | extern char* abac_decode_string(char *); |
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26 | extern void abac_yy_free_rule_clauses(); |
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27 | extern char *generate_pl_type_clause(char *, int); |
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28 | |
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29 | |
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30 | /* keeping this a fixed enum is to have tighter control of |
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31 | what are acceptabletypes of keyid are we allowing */ |
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32 | typedef enum _keyidtype_t { |
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33 | e_KEYID = 1, |
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34 | } keyidtype_t; |
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35 | |
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36 | /* keyidname[keyidtype] */ |
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37 | static char * const keyidname[] = |
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38 | { |
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39 | "badidtype", "keyid", 0 |
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40 | }; |
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41 | |
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42 | typedef enum _credtype_t { |
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43 | e_CREDTYPE_ROLE =1, |
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44 | e_CREDTYPE_OSET =2, |
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45 | } credtype_t; |
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46 | |
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47 | static int keyidname_cnt=1; |
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48 | |
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49 | struct _abac_id_cert_t { |
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50 | char *keyid; |
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51 | char *cn; |
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52 | int type; /* keyidtype */ |
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53 | certificate_t *cert; |
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54 | char *clause; |
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55 | |
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56 | UT_hash_handle hh; |
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57 | }; |
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58 | |
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59 | /* can store either role or oset */ |
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60 | struct _abac_credential_t { |
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61 | int type; |
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62 | void *head; |
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63 | void *tail; |
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64 | certificate_t *cert; |
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65 | certificate_t *issuer; |
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66 | abac_list_t *clauses; |
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67 | |
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68 | int refcount; |
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69 | }; |
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70 | |
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71 | typedef struct _abac_str_cred_t { |
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72 | char *strid; |
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73 | abac_credential_t *cred; |
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74 | |
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75 | UT_hash_handle hh; |
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76 | } abac_str_cred_t; |
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77 | |
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78 | abac_id_cert_t *id_certs = NULL; |
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79 | abac_str_cred_t *str_creds = NULL; |
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80 | |
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81 | static int debug=0; |
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82 | static void check_id_cert(abac_id_cert_t *id_cert); |
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83 | extern void abac_print_role_string_with_condition(abac_role_t *role, FILE*); |
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84 | |
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85 | // |
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86 | void abac_print_cred_info(abac_credential_t *cred, FILE *fp) |
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87 | { |
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88 | if(fp == NULL) |
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89 | fp=stdout; |
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90 | |
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91 | if(debug) { |
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92 | fprintf(fp,"---> printing out credential info cred(%d)..\n", (int) cred); |
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93 | if(cred->head) { |
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94 | fprintf(fp," head cred(%d):\n",(int)cred->head); |
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95 | if(cred->type == e_CREDTYPE_ROLE) |
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96 | abac_print_role_string_with_condition((abac_role_t*)cred->head,fp); |
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97 | else |
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98 | abac_print_oset_string_with_condition((abac_oset_t*)cred->head,fp); |
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99 | } |
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100 | if(cred->tail) { |
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101 | fprintf(fp,"\n tail cred(%d):\n",(int)cred->tail); |
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102 | if(cred->type == e_CREDTYPE_ROLE) |
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103 | abac_print_role_string_with_condition((abac_role_t*)cred->tail,fp); |
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104 | else |
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105 | abac_print_oset_string_with_condition((abac_oset_t*)cred->tail,fp); |
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106 | } |
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107 | |
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108 | abac_list_t *clauses=cred->clauses; |
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109 | if (clauses != NULL) { |
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110 | char *cur=NULL; |
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111 | abac_list_foreach(clauses, cur, |
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112 | fprintf(fp,"\n a clause(%d):\n",(int)cur); |
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113 | if(cur) |
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114 | fprintf(fp,"strlen(%d)loc(%d)(%s)\n", strlen(cur),(int)cur, cur); |
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115 | ); |
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116 | } |
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117 | } else { |
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118 | fprintf(fp," "); |
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119 | if(cred->type == e_CREDTYPE_ROLE) |
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120 | abac_print_role_string_with_condition((abac_role_t *)cred->head,fp); |
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121 | else abac_print_oset_string_with_condition((abac_oset_t *)cred->head,fp); |
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122 | fprintf(fp," <- "); |
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123 | if(cred->type == e_CREDTYPE_ROLE) |
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124 | abac_print_role_string_with_condition((abac_role_t *)cred->tail,fp); |
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125 | else abac_print_oset_string_with_condition((abac_oset_t *)cred->tail,fp); |
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126 | fprintf(fp,"\n"); |
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127 | } |
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128 | } |
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129 | |
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130 | // |
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131 | int abac_verify_keyid_type(char *type) { |
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132 | int i; |
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133 | |
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134 | if (type == NULL) |
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135 | return 0; |
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136 | |
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137 | for (i = 1; i <= keyidname_cnt ; i++) |
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138 | if(strcmp(type,keyidname[i])==0) |
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139 | return i; |
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140 | return 0; |
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141 | } |
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142 | |
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143 | char *abac_keyid_type(int i) |
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144 | { |
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145 | return keyidname[i]; |
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146 | } |
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147 | |
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148 | // convert a chunk to a lowercase binary string |
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149 | // malloc's the string |
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150 | static char *_chunk_to_string(chunk_t chunk) { |
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151 | int i; |
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152 | |
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153 | char *ret = abac_xmalloc(chunk.len * 2 + 1); |
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154 | |
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155 | for (i = 0; i < chunk.len; ++i) |
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156 | sprintf(ret + 2 * i, "%02x", chunk.ptr[i]); |
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157 | |
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158 | return ret; |
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159 | } |
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160 | |
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161 | // verify that cert was issued by issuer |
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162 | // cert and issuer can be the same, in which case the self-sig is validated |
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163 | static int _verify_signature(certificate_t *issuer, certificate_t *cert) { |
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164 | if (cert->issued_by(cert, issuer)) |
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165 | if (cert->get_validity(cert, NULL, NULL, NULL)) |
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166 | return 1; |
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167 | return 0; |
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168 | } |
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169 | |
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170 | /** |
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171 | * Init the verifier subsystem. |
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172 | */ |
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173 | void abac_verifier_init(void) { |
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174 | // silence all debugging |
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175 | |
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176 | if (!library_init(NULL)) |
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177 | exit(SS_RC_LIBSTRONGSWAN_INTEGRITY); |
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178 | |
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179 | if (!lib->plugins->load(lib->plugins, NULL, |
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180 | lib->settings->get_str(lib->settings, "pki.load", PLUGINS))) |
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181 | exit(SS_RC_INITIALIZATION_FAILED); |
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182 | } |
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183 | |
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184 | /** |
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185 | * Uninitialize the system, free up any allocated memory. |
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186 | */ |
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187 | void abac_verifier_deinit(void) { |
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188 | abac_id_cert_t *id; |
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189 | while ((id = id_certs) != NULL) { |
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190 | HASH_DEL(id_certs, id); |
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191 | |
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192 | free(id->keyid); |
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193 | free(id->cn); |
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194 | id->cert->destroy(id->cert); |
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195 | free(id); |
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196 | } |
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197 | |
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198 | abac_str_cred_t *id2; |
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199 | while ((id2 = str_creds) != NULL) { |
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200 | HASH_DEL(str_creds, id2); |
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201 | |
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202 | free(id2->strid); |
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203 | free(id2); |
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204 | } |
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205 | |
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206 | library_deinit(); |
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207 | } |
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208 | |
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209 | /** |
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210 | * Load an ID certificate. |
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211 | */ |
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212 | static int _load_id(certificate_t *cert, abac_id_cert_t **id_cert_ret) { |
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213 | abac_id_cert_t *id_cert = NULL; |
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214 | char *keyid = NULL; |
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215 | chunk_t id; |
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216 | int ret; |
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217 | x509_t *x509 = (x509_t *)cert; |
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218 | |
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219 | assert(cert != NULL); |
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220 | |
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221 | // get the key ID |
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222 | id = x509->get_subjectKeyIdentifier(x509); |
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223 | keyid = _chunk_to_string(id); |
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224 | |
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225 | /* Mike said this is the way it is */ |
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226 | char *str; |
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227 | int rv = asprintf(&str, "%Y", cert->get_issuer(cert)); |
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228 | |
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229 | /* add p to cn name here */ |
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230 | char *cn=(char *)abac_xmalloc(strlen(str)+2); |
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231 | cn[0]='p'; |
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232 | int n=sscanf(str,"CN=%s", &(cn[1])); |
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233 | if ( n!=1 ) { |
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234 | ret = ABAC_CERT_BAD_CN; |
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235 | goto error; |
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236 | } |
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237 | |
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238 | if(debug) { |
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239 | printf ("DEBUG:keyid %s \n", keyid); |
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240 | printf( "DEBUG:issuer '%s' \n", str); |
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241 | printf ("DEBUG:cn %s \n", cn); |
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242 | } |
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243 | free(str); |
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244 | |
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245 | // if we already have this cert 'error' with success |
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246 | HASH_FIND_STR(id_certs, keyid, id_cert); |
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247 | if (id_cert != NULL) { |
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248 | ret = ABAC_CERT_SUCCESS; |
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249 | goto error; |
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250 | } |
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251 | |
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252 | // validate sig |
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253 | ret = _verify_signature(cert, cert); |
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254 | if (!ret) { |
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255 | ret = ABAC_CERT_BAD_SIG; |
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256 | goto error; |
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257 | } |
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258 | |
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259 | // success, add the key to the map of certificates |
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260 | id_cert = abac_xmalloc(sizeof(abac_id_cert_t)); |
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261 | id_cert->keyid = keyid; |
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262 | id_cert->cert = cert; |
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263 | id_cert->cn = cn; |
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264 | id_cert->type = e_KEYID; |
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265 | id_cert->clause = generate_pl_type_clause(cn, id_cert->type); |
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266 | |
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267 | HASH_ADD_KEYPTR(hh, id_certs, id_cert->keyid, strlen(id_cert->keyid), id_cert); |
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268 | |
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269 | *id_cert_ret=id_cert; |
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270 | |
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271 | return ABAC_CERT_SUCCESS; |
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272 | |
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273 | error: |
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274 | if (keyid != NULL) free(keyid); |
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275 | if (cn != NULL) free(cn); |
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276 | |
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277 | return ret; |
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278 | } |
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279 | |
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280 | static void check_id_cert(abac_id_cert_t *id_cert) |
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281 | { |
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282 | if(id_cert) { |
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283 | printf("checking on this id_cert %d\n", (int)id_cert); |
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284 | printf(" --> sha is (%s)\n", id_cert->keyid); |
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285 | printf(" --> cn is (%s)\n", id_cert->cn); |
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286 | } |
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287 | } |
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288 | |
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289 | /** |
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290 | * Load an attribute cert as string. |
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291 | * have minimum syntax & validity check |
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292 | */ |
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293 | static int _load_attribute_string(char* attr_string) { |
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294 | printf("NOT implemented yet!!!"); |
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295 | return ABAC_CERT_INVALID; |
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296 | } |
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297 | |
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298 | /** |
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299 | * Load an ID cert from a file. |
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300 | */ |
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301 | int abac_verifier_load_id_file(char *filename, abac_id_cert_t **id_cert_ret) { |
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302 | if (lib == NULL) |
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303 | errx(1, "looks like you didn't call libabac_init() (lib is NULL)"); |
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304 | |
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305 | // load the cert |
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306 | certificate_t *cert = lib->creds->create( |
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307 | lib->creds, CRED_CERTIFICATE, CERT_X509, |
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308 | BUILD_FROM_FILE, filename, |
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309 | BUILD_X509_FLAG, X509_AA, // attribute authority, dumb |
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310 | BUILD_END |
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311 | ); |
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312 | if (cert == NULL) |
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313 | return ABAC_CERT_INVALID; |
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314 | return _load_id(cert,id_cert_ret); |
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315 | } |
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316 | |
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317 | /** |
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318 | * Load an ID cert from a chunk. |
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319 | */ |
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320 | int abac_verifier_load_id_chunk(chunk_t chunk, abac_id_cert_t **id_cert_ret) { |
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321 | // load the cert |
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322 | certificate_t *cert = lib->creds->create( |
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323 | lib->creds, CRED_CERTIFICATE, CERT_X509, |
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324 | BUILD_BLOB_ASN1_DER, chunk, |
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325 | BUILD_X509_FLAG, X509_AA, // attribute authority, dumb |
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326 | BUILD_END |
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327 | ); |
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328 | if (cert == NULL) |
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329 | return ABAC_CERT_INVALID; |
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330 | return _load_id(cert,id_cert_ret); |
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331 | } |
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332 | |
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333 | |
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334 | void abac_print_clauses(abac_list_t *clauses, FILE *fp) |
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335 | { |
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336 | if (clauses != NULL) { |
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337 | char *cur; |
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338 | abac_list_foreach(clauses, cur, |
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339 | if(cur) { |
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340 | if(fp) |
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341 | fprintf (fp,"a clause, %d(%s)\n", (int)cur,cur); |
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342 | else printf ("a clause, %d(%s)\n", (int)cur,cur); |
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343 | } |
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344 | ); |
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345 | } |
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346 | } |
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347 | |
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348 | static int _verify_valid_role_credential(certificate_t *cert, |
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349 | abac_credential_t **cred_ret, char *encoded_attr_string) |
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350 | { |
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351 | abac_role_t *head_role = NULL; |
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352 | abac_role_t *tail_role = NULL; |
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353 | abac_list_t *clauses=NULL; |
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354 | abac_id_cert_t *issuer; |
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355 | int ret, i; |
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356 | |
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357 | // get the attr |
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358 | head_role = abac_yy_get_rule_head_role(); |
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359 | tail_role = abac_yy_get_rule_tail_role(); |
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360 | clauses = abac_yy_get_rule_clauses(); |
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361 | |
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362 | // get the issuer based on keyid |
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363 | char *principalname = abac_role_principal(head_role); |
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364 | HASH_FIND_STR(id_certs, principalname, issuer); |
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365 | if (issuer == NULL) { |
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366 | ret = ABAC_CERT_MISSING_ISSUER; |
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367 | goto error; |
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368 | } |
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369 | |
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370 | // make sure the issuer's signed it |
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371 | ret = _verify_signature(issuer->cert, cert); |
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372 | if (!ret) { |
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373 | abac_yy_set_error_code(ABAC_RT_CERT_BAD_SIG); |
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374 | goto error; |
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375 | } |
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376 | |
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377 | // at this point we know we have a good attribute cert |
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378 | abac_credential_t *cred = abac_xmalloc(sizeof(abac_credential_t)); |
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379 | cred->type= e_CREDTYPE_ROLE; |
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380 | cred->head = head_role; |
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381 | cred->tail = tail_role; |
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382 | cred->cert = cert; |
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383 | cred->issuer = issuer->cert->get_ref(issuer->cert); |
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384 | cred->clauses = clauses; |
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385 | cred->refcount = 1; |
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386 | *cred_ret = cred; |
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387 | |
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388 | // success, add the key to the map of certificates |
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389 | abac_str_cred_t *str_cred; |
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390 | str_cred=abac_xmalloc(sizeof(abac_str_cred_t)); |
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391 | str_cred->strid=strdup(encoded_attr_string); |
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392 | str_cred->cred=cred; |
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393 | HASH_ADD_KEYPTR(hh, str_creds, str_cred->strid, strlen(str_cred->strid), str_cred); |
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394 | |
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395 | return ABAC_CERT_SUCCESS; |
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396 | |
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397 | error: |
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398 | if (head_role) abac_role_free(head_role); |
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399 | if (tail_role) abac_role_free(tail_role); |
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400 | abac_yy_free_rule_clauses(); |
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401 | |
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402 | return ret; |
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403 | } |
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404 | |
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405 | static int _verify_valid_oset_credential(certificate_t *cert, |
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406 | abac_credential_t **cred_ret, char *encoded_attr_string) |
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407 | { |
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408 | abac_oset_t *head_oset = NULL; |
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409 | abac_oset_t *tail_oset = NULL; |
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410 | abac_list_t *clauses=NULL; |
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411 | abac_id_cert_t *issuer; |
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412 | int ret, i; |
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413 | |
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414 | // get the attr |
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415 | head_oset = abac_yy_get_rule_head_oset(); |
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416 | tail_oset = abac_yy_get_rule_tail_oset(); |
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417 | clauses = abac_yy_get_rule_clauses(); |
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418 | |
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419 | // get the issuer based on keyid |
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420 | char *principalname = abac_oset_principal(head_oset); |
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421 | HASH_FIND_STR(id_certs, principalname, issuer); |
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422 | if (issuer == NULL) { |
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423 | ret = ABAC_CERT_MISSING_ISSUER; |
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424 | goto error; |
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425 | } |
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426 | |
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427 | // make sure the issuer's signed it |
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428 | ret = _verify_signature(issuer->cert, cert); |
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429 | if (!ret) { |
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430 | abac_yy_set_error_code(ABAC_RT_CERT_BAD_SIG); |
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431 | goto error; |
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432 | } |
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433 | |
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434 | // at this point we know we have a good attribute cert |
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435 | abac_credential_t *cred = abac_xmalloc(sizeof(abac_credential_t)); |
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436 | cred->type= e_CREDTYPE_OSET; |
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437 | cred->head = head_oset; |
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438 | cred->tail = tail_oset; |
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439 | cred->cert = cert; |
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440 | cred->issuer = issuer->cert->get_ref(issuer->cert); |
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441 | cred->clauses = clauses; |
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442 | cred->refcount = 1; |
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443 | *cred_ret = cred; |
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444 | |
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445 | // success, add the key to the map of certificates |
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446 | abac_str_cred_t *str_cred; |
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447 | str_cred=abac_xmalloc(sizeof(abac_str_cred_t)); |
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448 | str_cred->strid=strdup(encoded_attr_string); |
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449 | str_cred->cred=cred; |
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450 | HASH_ADD_KEYPTR(hh, str_creds, str_cred->strid, strlen(str_cred->strid), str_cred); |
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451 | |
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452 | return ABAC_CERT_SUCCESS; |
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453 | |
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454 | error: |
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455 | if (head_oset) abac_oset_free(head_oset); |
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456 | if (tail_oset) abac_oset_free(tail_oset); |
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457 | abac_yy_free_rule_clauses(); |
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458 | |
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459 | return ret; |
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460 | } |
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461 | /** |
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462 | * Load an attribute cert. |
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463 | * Returns true only if the certificate is valid and is issued by the proper |
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464 | * authority. |
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465 | */ |
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466 | static int _load_attribute_cert(certificate_t *cert, abac_credential_t **cred_ret) { |
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467 | ietf_attributes_t *attr_cert = NULL; |
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468 | abac_id_cert_t *issuer; |
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469 | int ret, i; |
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470 | |
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471 | // get the attr |
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472 | ac_t *ac = (ac_t *)cert; |
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473 | attr_cert = ac->get_groups(ac); |
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474 | if (attr_cert == NULL) { |
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475 | ret = ABAC_CERT_INVALID; |
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476 | goto error; |
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477 | } |
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478 | |
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479 | char *encoded_attr_string=attr_cert->get_string(attr_cert); |
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480 | char *attr_string = abac_decode_string(encoded_attr_string); |
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481 | if(debug) |
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482 | printf("string to be yyparse..(%s)\n",attr_string); |
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483 | |
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484 | if (attr_string == NULL) { |
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485 | ret = ABAC_CERT_INVALID; |
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486 | goto error; |
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487 | } |
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488 | |
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489 | /* call into yacc parser */ |
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490 | abac_reset_yyfptr(attr_string); |
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491 | abac_yy_init(); |
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492 | int rc=yyparse(); |
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493 | if (rc) { |
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494 | ret = ABAC_CERT_INVALID; |
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495 | goto error; |
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496 | } |
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497 | |
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498 | if(abac_yy_get_rule_is_oset()) { |
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499 | ret=_verify_valid_oset_credential(cert,cred_ret,encoded_attr_string); |
---|
500 | } else { |
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501 | ret=_verify_valid_role_credential(cert,cred_ret,encoded_attr_string); |
---|
502 | } |
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503 | |
---|
504 | // free up some crap |
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505 | attr_cert->destroy(attr_cert); |
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506 | |
---|
507 | return ABAC_CERT_SUCCESS; |
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508 | |
---|
509 | error: |
---|
510 | if (cert) cert->destroy(cert); |
---|
511 | if (attr_cert) attr_cert->destroy(attr_cert); |
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512 | return ret; |
---|
513 | } |
---|
514 | |
---|
515 | /** |
---|
516 | * Load an attribute cert from a file. |
---|
517 | */ |
---|
518 | int abac_verifier_load_attribute_cert_file(char *filename, abac_credential_t **cred) { |
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519 | // load the cert |
---|
520 | certificate_t *cert = lib->creds->create( |
---|
521 | lib->creds, CRED_CERTIFICATE, CERT_X509_AC, |
---|
522 | BUILD_FROM_FILE, filename, |
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523 | BUILD_END |
---|
524 | ); |
---|
525 | if (cert == NULL) |
---|
526 | return ABAC_CERT_INVALID; |
---|
527 | return _load_attribute_cert(cert, cred); |
---|
528 | } |
---|
529 | |
---|
530 | /** |
---|
531 | * Load attribute cert rules from a file. (this should only be used to test) |
---|
532 | */ |
---|
533 | int abac_verifier_load_certs_file(char *filename) { |
---|
534 | size_t nbytes=0; |
---|
535 | char *input=NULL; |
---|
536 | FILE *fp; |
---|
537 | int ret; |
---|
538 | |
---|
539 | fp=fopen(filename, "r"); |
---|
540 | |
---|
541 | if(fp == NULL) |
---|
542 | return ABAC_CERT_INVALID; |
---|
543 | |
---|
544 | while( (ret=getline(&input, &nbytes, fp)) != -1 ) { |
---|
545 | ret=_load_attribute_string(input); |
---|
546 | free(input); |
---|
547 | if(ret != ABAC_CERT_SUCCESS ) |
---|
548 | fclose(fp); |
---|
549 | return ret; |
---|
550 | } |
---|
551 | fclose(fp); |
---|
552 | return ABAC_CERT_SUCCESS; |
---|
553 | } |
---|
554 | |
---|
555 | |
---|
556 | /** |
---|
557 | * Load an attribute cert from a chunk. |
---|
558 | */ |
---|
559 | int abac_verifier_load_attribute_cert_chunk(chunk_t chunk, abac_credential_t **cred) { |
---|
560 | // load the cert |
---|
561 | certificate_t *cert = lib->creds->create( |
---|
562 | lib->creds, CRED_CERTIFICATE, CERT_X509_AC, |
---|
563 | BUILD_BLOB_ASN1_DER, chunk, |
---|
564 | BUILD_END |
---|
565 | ); |
---|
566 | if (cert == NULL) |
---|
567 | return ABAC_CERT_INVALID; |
---|
568 | return _load_attribute_cert(cert, cred); |
---|
569 | } |
---|
570 | |
---|
571 | /** |
---|
572 | * Return the encoding of the attribute cert. |
---|
573 | */ |
---|
574 | abac_chunk_t abac_credential_attribute_cert(abac_credential_t *cred) { |
---|
575 | chunk_t encoding = cred->cert->get_encoding(cred->cert); |
---|
576 | abac_chunk_t ret = { encoding.ptr, encoding.len }; |
---|
577 | return ret; |
---|
578 | } |
---|
579 | |
---|
580 | /** |
---|
581 | * Return the encoding of the issuer cert. |
---|
582 | */ |
---|
583 | abac_chunk_t abac_credential_issuer_cert(abac_credential_t *cred) { |
---|
584 | chunk_t encoding = cred->issuer->get_encoding(cred->issuer); |
---|
585 | abac_chunk_t ret = { encoding.ptr, encoding.len }; |
---|
586 | return ret; |
---|
587 | } |
---|
588 | |
---|
589 | /** |
---|
590 | * Return the clause of the cert |
---|
591 | */ |
---|
592 | abac_list_t *abac_credential_clauses(abac_credential_t *cred) { |
---|
593 | return cred->clauses; |
---|
594 | } |
---|
595 | |
---|
596 | |
---|
597 | /** |
---|
598 | * Increase the ref count of a credential. |
---|
599 | */ |
---|
600 | abac_credential_t *abac_credential_dup(abac_credential_t *cred) { |
---|
601 | assert(cred != NULL); |
---|
602 | |
---|
603 | ++cred->refcount; |
---|
604 | return cred; |
---|
605 | } |
---|
606 | |
---|
607 | /** |
---|
608 | * lookup for a credential. |
---|
609 | */ |
---|
610 | abac_credential_t *abac_credential_lookup(char* cred_string) |
---|
611 | { |
---|
612 | if(debug) |
---|
613 | printf("DEBUG:doing abac_crendential_lookup ... (%s)\n", cred_string); |
---|
614 | abac_str_cred_t *str_cred; |
---|
615 | HASH_FIND_STR(str_creds, cred_string, str_cred); |
---|
616 | if (str_cred == NULL) { |
---|
617 | if(debug) printf("DEBUG:NOT FOUND..\n"); |
---|
618 | return NULL; |
---|
619 | } |
---|
620 | if(debug) printf("DEBUG:FOUND..(%d)\n", (int) str_cred->cred); |
---|
621 | return str_cred->cred; |
---|
622 | } |
---|
623 | |
---|
624 | /** |
---|
625 | * Decrease the reference count of a credential, freeing it when it reaches 0. |
---|
626 | */ |
---|
627 | void abac_credential_free(abac_credential_t *cred) |
---|
628 | { |
---|
629 | if(debug) |
---|
630 | printf("DEBUG:freeing cred(%d)clause(%d)\n", (int)cred, (int)cred->clauses); |
---|
631 | |
---|
632 | if (cred == NULL) |
---|
633 | return; |
---|
634 | |
---|
635 | --cred->refcount; |
---|
636 | if (cred->refcount > 0) |
---|
637 | return; |
---|
638 | |
---|
639 | if(cred->type == e_CREDTYPE_ROLE) { |
---|
640 | abac_role_free((abac_role_t *)cred->head); |
---|
641 | abac_role_free((abac_role_t *)cred->tail); |
---|
642 | } else { |
---|
643 | abac_oset_free((abac_oset_t *)cred->head); |
---|
644 | abac_oset_free((abac_oset_t *)cred->tail); |
---|
645 | } |
---|
646 | cred->cert->destroy(cred->cert); |
---|
647 | cred->issuer->destroy(cred->issuer); // reference counted |
---|
648 | /* no need to freeyap_clauses here */ |
---|
649 | free(cred); |
---|
650 | } |
---|
651 | |
---|
652 | char *abac_id_clause(abac_id_cert_t *id_cert) |
---|
653 | { |
---|
654 | if(id_cert) |
---|
655 | return id_cert->clause; |
---|
656 | return NULL; |
---|
657 | } |
---|
658 | |
---|
659 | /* retrieve the cn that is associated with this sha_string */ |
---|
660 | char *abac_cn_with_sha(char *sha_string) { |
---|
661 | |
---|
662 | // get the issuer based on keyid |
---|
663 | abac_id_cert_t *id_cert; |
---|
664 | HASH_FIND_STR(id_certs, sha_string, id_cert); |
---|
665 | if (id_cert == NULL) { |
---|
666 | return NULL; |
---|
667 | } |
---|
668 | if(debug) |
---|
669 | check_id_cert(id_cert); |
---|
670 | return id_cert->cn; |
---|
671 | } |
---|
672 | |
---|
673 | /* retrieve the cn that is associated with the principal of this role */ |
---|
674 | char *abac_cn_with_role(abac_role_t *role) { |
---|
675 | |
---|
676 | char *principal = abac_role_principal(role); |
---|
677 | return abac_cn_with_sha(principal); |
---|
678 | } |
---|
679 | |
---|
680 | /* retrieve the cn that is associated with the principal of this oset */ |
---|
681 | char *abac_cn_with_oset(abac_oset_t *oset) { |
---|
682 | char *principal = abac_oset_principal(oset); |
---|
683 | return abac_cn_with_sha(principal); |
---|
684 | } |
---|
685 | |
---|