1 | |
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2 | /* C declarations */ |
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3 | #include <stdio.h> |
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4 | #include <string.h> |
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5 | #include <stdlib.h> |
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6 | |
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7 | #include "uthash.h" |
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8 | #include "abac_util.h" |
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9 | |
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10 | #include "abac_pl_yy.h" |
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11 | |
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12 | static int debug=0; |
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13 | |
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14 | extern abac_list_t *generate_pl_clauses(abac_role_t *, abac_role_t *); |
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15 | extern void panic(char*); |
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16 | extern char *generate_pl_type_clause(char *, int); |
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17 | void _add_yy_id_certs(char *, int); |
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18 | |
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19 | abac_list_t *abac_yap_clauses=NULL; |
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20 | /* this is to track individual id credentials */ |
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21 | abac_stack_t *abac_yap_id_clauses=NULL; |
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22 | |
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23 | abac_role_t *abac_yap_head_role=NULL; |
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24 | abac_role_t *abac_yap_tail_role=NULL; |
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25 | |
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26 | /* XXX do we want to check whether the id cert is preexisting or not */ |
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27 | /* this is to track id certs within a rule clause */ |
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28 | typedef struct _abac_yy_id_cert_t { |
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29 | char *principalname; |
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30 | int type; /* keyidtype */ |
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31 | char *clause; |
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32 | |
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33 | UT_hash_handle hh; |
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34 | } abac_yy_id_cert_t; |
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35 | |
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36 | abac_list_t *abac_yy_id_certs = NULL; |
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37 | |
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38 | /* local principal structure [keyid:USC] */ |
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39 | struct _abac_yy_principal_t { |
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40 | int type; |
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41 | char *sha; |
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42 | char *cn; |
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43 | }; |
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44 | |
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45 | /* like [principal:?Z]:..., must match a principal name */ |
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46 | struct _abac_yy_param_principal_t { |
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47 | int type; /* this needs to be implicitly determined */ |
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48 | char *name; |
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49 | char *condition; |
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50 | }; |
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51 | |
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52 | /* if has condition, then it is a variable, |
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53 | ie, |
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54 | [int:?Year]:<1930..1932>, |
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55 | if no condition, then it is a constant, |
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56 | ie, |
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57 | [int:10] |
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58 | */ |
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59 | struct _abac_yy_param_data_t { |
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60 | int is_variable; |
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61 | int type; |
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62 | char *name; |
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63 | char *condition; |
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64 | }; |
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65 | |
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66 | /* local dterm structure, will distinguish it in the future */ |
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67 | struct _abac_yy_dterm_t { |
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68 | union { |
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69 | abac_yy_principal_t *n_ptr; |
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70 | abac_yy_param_principal_t *p_ptr; |
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71 | abac_yy_param_data_t *d_ptr; |
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72 | } term; |
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73 | int type; |
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74 | struct _abac_yy_dterm_t *next; |
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75 | int bcnt; /* this is to track number of dterms in this linked up list */ |
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76 | }; |
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77 | |
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78 | /* local role structure */ |
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79 | struct _abac_yy_role_t { |
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80 | int type; |
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81 | char *name; |
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82 | abac_yy_dterm_t *dterms; |
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83 | struct _abac_yy_role_t *next; |
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84 | int bcnt; /* this is to track number of roles in this linked up list */ |
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85 | }; |
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86 | |
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87 | struct _abac_yy_role_expression_t { |
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88 | int rtype; |
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89 | abac_yy_principal_t *principal; |
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90 | abac_yy_role_t *linked_role; |
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91 | abac_yy_role_t *role; |
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92 | struct _abac_yy_role_expression_t *next; |
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93 | int bcnt; |
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94 | }; |
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95 | |
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96 | static void _free_yy_dterm(abac_yy_dterm_t *ptr); |
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97 | |
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98 | /************************************************************************/ |
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99 | abac_stack_t *abac_get_yap_id_clauses() |
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100 | { |
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101 | return abac_yap_id_clauses; |
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102 | } |
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103 | |
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104 | abac_stack_t *abac_init_yap_id_clauses() |
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105 | { |
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106 | abac_yap_id_clauses=abac_stack_new(); |
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107 | return abac_yap_id_clauses; |
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108 | } |
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109 | |
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110 | void abac_free_yap_id_clauses() |
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111 | { |
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112 | if (abac_yap_id_clauses != NULL) |
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113 | abac_stack_free(abac_yap_id_clauses); |
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114 | } |
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115 | |
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116 | void set_yap_clauses(abac_list_t *clauses) |
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117 | { |
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118 | abac_yap_clauses=clauses; |
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119 | if(debug) { |
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120 | printf("printing out abac_yap_clauses:\n"); |
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121 | abac_print_clauses(abac_yap_clauses); |
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122 | } |
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123 | } |
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124 | |
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125 | abac_list_t *abac_get_yap_clauses() |
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126 | { |
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127 | return abac_yap_clauses; |
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128 | } |
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129 | |
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130 | void abac_free_yap_clauses() |
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131 | { |
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132 | if (abac_yap_clauses != NULL) { |
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133 | char *cur; |
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134 | abac_list_foreach(abac_yy_id_certs, cur, |
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135 | if(cur) free(cur); |
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136 | ); |
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137 | abac_list_free(abac_yap_clauses); |
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138 | } |
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139 | } |
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140 | |
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141 | abac_role_t *abac_get_yap_head_role() |
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142 | { |
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143 | return abac_yap_head_role; |
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144 | } |
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145 | |
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146 | abac_role_t *abac_get_yap_tail_role() |
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147 | { |
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148 | return abac_yap_tail_role; |
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149 | } |
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150 | |
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151 | void abac_init_yy_id_certs() |
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152 | { |
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153 | abac_yy_id_certs = abac_list_new(); |
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154 | } |
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155 | |
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156 | void abac_free_yy_id_certs() |
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157 | { |
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158 | abac_yy_id_cert_t *id; |
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159 | abac_list_foreach(abac_yy_id_certs, id, |
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160 | if(id) |
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161 | free(id->principalname); |
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162 | free(id->clause); |
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163 | free(id); |
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164 | ); |
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165 | abac_list_free(abac_yy_id_certs); |
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166 | } |
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167 | |
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168 | int abac_cnt_yy_id_certs() |
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169 | { |
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170 | return abac_list_size(abac_yy_id_certs); |
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171 | } |
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172 | |
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173 | char *abac_string_yy_id_certs() |
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174 | { |
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175 | int first=1; |
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176 | char *tmp=NULL; |
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177 | abac_yy_id_cert_t *cur; |
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178 | abac_list_foreach(abac_yy_id_certs, cur, |
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179 | if(cur) |
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180 | if(first) { |
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181 | tmp=abac_xstrdup(cur->clause); |
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182 | first=0; |
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183 | } else { |
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184 | int cnt=asprintf(&tmp,"%s,%s", tmp, cur->clause); |
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185 | } |
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186 | ); |
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187 | return tmp; |
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188 | } |
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189 | |
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190 | void _add_yy_id_certs(char *principalname, int type) |
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191 | { |
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192 | abac_yy_id_cert_t *id_cert=NULL; |
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193 | |
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194 | int found=0; |
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195 | abac_yy_id_cert_t *cur; |
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196 | abac_list_foreach(abac_yy_id_certs, cur, |
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197 | if(cur) |
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198 | if(strcmp(cur->principalname,principalname)==0) { |
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199 | found=1; |
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200 | break; |
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201 | } |
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202 | ); |
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203 | |
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204 | if (found) { |
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205 | return; |
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206 | } else { |
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207 | id_cert=abac_xmalloc(sizeof(abac_yy_id_cert_t)); |
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208 | id_cert->principalname=abac_xstrdup(principalname); |
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209 | id_cert->type=type; |
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210 | id_cert->clause=generate_pl_type_clause(principalname,type); |
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211 | abac_list_add(abac_yy_id_certs, id_cert); |
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212 | } |
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213 | } |
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214 | |
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215 | /****************************************************************************/ |
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216 | abac_yy_principal_t *make_yy_principal(char *sha, char *cn, int type) |
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217 | { |
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218 | abac_yy_principal_t *ptr= |
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219 | (abac_yy_principal_t*)abac_xmalloc(sizeof(abac_yy_principal_t)); |
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220 | ptr->sha=abac_xstrdup(sha); |
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221 | ptr->cn=abac_xstrdup(cn); |
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222 | ptr->type=type; |
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223 | return ptr; |
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224 | } |
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225 | |
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226 | static void _free_yy_principal(abac_yy_principal_t *ptr) |
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227 | { |
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228 | free(ptr->sha); |
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229 | if(ptr->cn) |
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230 | free(ptr->cn); |
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231 | free(ptr); |
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232 | } |
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233 | |
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234 | abac_yy_role_t *make_yy_role(char *name, abac_yy_dterm_t *dterms) |
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235 | { |
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236 | abac_yy_role_t *ptr=(abac_yy_role_t*)abac_xmalloc(sizeof(abac_yy_role_t)); |
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237 | ptr->name=abac_xstrdup(name); |
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238 | ptr->dterms=dterms; |
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239 | ptr->next=NULL; |
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240 | ptr->bcnt=1; |
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241 | return ptr; |
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242 | } |
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243 | |
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244 | static void _free_yy_role(abac_yy_role_t *ptr) |
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245 | { |
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246 | free(ptr->name); |
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247 | if(ptr->dterms) |
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248 | _free_yy_dterm(ptr->dterms); |
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249 | if(ptr->next) |
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250 | _free_yy_role(ptr->next); |
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251 | free(ptr); |
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252 | } |
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253 | |
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254 | abac_yy_role_expression_t *make_yy_role_expression(int rtype, |
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255 | abac_yy_principal_t *principal, abac_yy_role_t *role, abac_yy_role_t *linked_role) |
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256 | { |
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257 | abac_yy_role_expression_t *ptr= |
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258 | (abac_yy_role_expression_t*)abac_xmalloc(sizeof(abac_yy_role_expression_t)); |
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259 | ptr->rtype = rtype; |
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260 | ptr->principal = principal; |
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261 | ptr->role = role; |
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262 | ptr->linked_role=linked_role; |
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263 | ptr->next=NULL; |
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264 | |
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265 | return ptr; |
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266 | } |
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267 | |
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268 | abac_yy_role_expression_t *add_yy_role_expression(abac_yy_role_expression_t *nexpr, |
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269 | abac_yy_role_expression_t *exprs) |
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270 | { |
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271 | int i=exprs->bcnt; |
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272 | nexpr->next=exprs; |
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273 | nexpr->bcnt=i+1; |
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274 | return nexpr; |
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275 | } |
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276 | |
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277 | |
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278 | static void _free_yy_role_expression(abac_yy_role_expression_t *ptr) |
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279 | { |
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280 | if(ptr->principal) |
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281 | _free_yy_principal(ptr->principal); |
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282 | if(ptr->role) |
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283 | _free_yy_role(ptr->role); |
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284 | if(ptr->linked_role) |
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285 | _free_yy_role(ptr->linked_role); |
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286 | if(ptr->next) |
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287 | _free_yy_role_expression(ptr->next); |
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288 | |
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289 | free(ptr); |
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290 | } |
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291 | |
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292 | abac_yy_param_data_t *make_yy_param_data(char* name, char* typestr) |
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293 | { |
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294 | int type=abac_verify_dterm_type(typestr); |
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295 | abac_yy_param_data_t *ptr= |
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296 | (abac_yy_param_data_t*)abac_xmalloc(sizeof(abac_yy_param_data_t)); |
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297 | ptr->name=abac_xstrdup(name); |
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298 | ptr->type=type; |
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299 | ptr->condition=NULL; |
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300 | ptr->is_variable=0; |
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301 | return ptr; |
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302 | } |
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303 | |
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304 | void set_yy_param_data_is_variable(abac_yy_param_data_t *ptr) |
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305 | { |
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306 | ptr->is_variable=1; |
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307 | } |
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308 | |
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309 | static void _free_yy_param_data(abac_yy_param_data_t *ptr) |
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310 | { |
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311 | free(ptr->name); |
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312 | if(ptr->condition) |
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313 | free(ptr->condition); |
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314 | free(ptr); |
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315 | } |
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316 | |
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317 | abac_yy_param_principal_t *make_yy_param_principal(char* name) |
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318 | { |
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319 | abac_yy_param_principal_t *ptr= |
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320 | (abac_yy_param_principal_t*)abac_xmalloc(sizeof(abac_yy_param_principal_t)); |
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321 | ptr->name=abac_xstrdup(name); |
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322 | ptr->condition=NULL; |
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323 | return ptr; |
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324 | } |
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325 | |
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326 | static void _free_yy_param_principal(abac_yy_param_principal_t *ptr) |
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327 | { |
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328 | free(ptr->name); |
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329 | if(ptr->condition) |
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330 | free(ptr->condition); |
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331 | free(ptr); |
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332 | } |
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333 | |
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334 | abac_yy_dterm_t *make_yy_dterm_anonymous() |
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335 | { |
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336 | abac_yy_dterm_t *ptr=(abac_yy_dterm_t*)abac_xmalloc(sizeof(abac_yy_dterm_t)); |
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337 | ptr->type = DTERM_ANONYMOUS; |
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338 | ptr->next=NULL; |
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339 | ptr->bcnt=1; |
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340 | return ptr; |
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341 | } |
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342 | |
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343 | abac_yy_dterm_t *make_yy_dterm_principal(abac_yy_param_principal_t *pptr) |
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344 | { |
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345 | abac_yy_dterm_t *ptr=(abac_yy_dterm_t*)abac_xmalloc(sizeof(abac_yy_dterm_t)); |
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346 | ptr->type = DTERM_PRINCIPAL; |
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347 | ptr->term.p_ptr=pptr; |
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348 | ptr->next=NULL; |
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349 | ptr->bcnt=1; |
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350 | return ptr; |
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351 | } |
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352 | |
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353 | abac_yy_dterm_t *make_yy_dterm_named(abac_yy_principal_t *nptr) |
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354 | { |
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355 | abac_yy_dterm_t *ptr=(abac_yy_dterm_t*)abac_xmalloc(sizeof(abac_yy_dterm_t)); |
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356 | ptr->type = DTERM_NAMED; |
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357 | ptr->term.n_ptr=nptr; |
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358 | ptr->next=NULL; |
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359 | ptr->bcnt=1; |
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360 | return ptr; |
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361 | } |
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362 | |
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363 | abac_yy_dterm_t *make_yy_dterm_data(abac_yy_param_data_t *dptr) |
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364 | { |
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365 | abac_yy_dterm_t *ptr=(abac_yy_dterm_t*)abac_xmalloc(sizeof(abac_yy_dterm_t)); |
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366 | ptr->type = DTERM_DATA; |
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367 | ptr->term.d_ptr=dptr; |
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368 | ptr->next=NULL; |
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369 | ptr->bcnt=1; |
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370 | return ptr; |
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371 | } |
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372 | |
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373 | abac_yy_dterm_t *add_yy_dterm(abac_yy_dterm_t *nterm, abac_yy_dterm_t *dterms) |
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374 | { |
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375 | int i=dterms->bcnt; |
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376 | nterm->next=dterms; |
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377 | nterm->bcnt=i+1; |
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378 | return nterm; |
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379 | } |
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380 | |
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381 | static void _free_yy_dterm(abac_yy_dterm_t *ptr) |
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382 | { |
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383 | switch (ptr->type) { |
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384 | case DTERM_DATA: |
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385 | _free_yy_param_data(ptr->term.d_ptr); |
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386 | break; |
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387 | case DTERM_NAMED: |
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388 | _free_yy_principal(ptr->term.n_ptr); |
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389 | break; |
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390 | case DTERM_PRINCIPAL: |
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391 | _free_yy_param_principal(ptr->term.p_ptr); |
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392 | break; |
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393 | case DTERM_ANONYMOUS: |
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394 | break; |
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395 | } |
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396 | if(ptr->next) |
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397 | _free_yy_dterm(ptr->next); |
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398 | free(ptr); |
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399 | } |
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400 | |
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401 | /****************************************************************/ |
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402 | static void _role_add_dterms(int linked, abac_role_t *role, abac_yy_dterm_t *dterms) |
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403 | { |
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404 | abac_yy_dterm_t *curr = dterms; |
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405 | int type; |
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406 | char *name=NULL; |
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407 | char *cond=NULL; |
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408 | while (curr) { |
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409 | switch (curr->type) { |
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410 | case DTERM_DATA: |
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411 | { |
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412 | abac_yy_param_data_t *ptr=curr->term.d_ptr; |
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413 | type=ptr->type; |
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414 | name=abac_xstrdup(ptr->name); |
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415 | cond=abac_xstrdup(ptr->condition); |
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416 | if(ptr->is_variable) { |
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417 | /* XXX do some tracking */ |
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418 | } |
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419 | break; |
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420 | } |
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421 | case DTERM_PRINCIPAL: |
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422 | { |
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423 | abac_yy_param_principal_t *ptr=curr->term.p_ptr; |
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424 | type=abac_verify_dterm_type("principal"); |
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425 | name=abac_xstrdup(ptr->name); |
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426 | cond=abac_xstrdup(ptr->condition); |
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427 | /* XXX variable one, do some tracking */ |
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428 | break; |
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429 | } |
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430 | case DTERM_NAMED: |
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431 | { |
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432 | abac_yy_principal_t *ptr=curr->term.n_ptr; |
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433 | type=ptr->type; |
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434 | /* XXX should be switching to sha in the future */ |
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435 | name=abac_xstrdup(ptr->cn); |
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436 | cond=NULL; |
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437 | break; |
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438 | } |
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439 | case DTERM_ANONYMOUS: |
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440 | { |
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441 | type=0; |
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442 | name=abac_xstrdup("_"); |
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443 | cond=NULL; |
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444 | break; |
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445 | } |
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446 | } |
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447 | if (linked) |
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448 | abac_role_role_add_linked_param(role, type, name, cond); |
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449 | else |
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450 | abac_role_role_add_param(role, type, name, cond); |
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451 | curr=curr->next; |
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452 | } |
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453 | } |
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454 | |
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455 | static void _role_add_linked_dterms(abac_role_t *role, abac_yy_dterm_t *dterms) |
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456 | { |
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457 | int linked=1; |
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458 | _role_add_dterms(linked, role, dterms); |
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459 | } |
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460 | |
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461 | static void _role_add_role_dterms(abac_role_t *role, abac_yy_dterm_t *dterms) |
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462 | { |
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463 | int linked=0; |
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464 | _role_add_dterms(linked, role, dterms); |
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465 | } |
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466 | |
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467 | |
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468 | abac_role_t *validate_intersected_tail_role(abac_role_t *role) |
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469 | { |
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470 | abac_role_t *ret_role=NULL; |
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471 | abac_list_t *prereqs = abac_list_new(); |
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472 | abac_list_add(prereqs, role); |
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473 | ret_role = abac_role_intersection_new("intersectingROLE", prereqs); |
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474 | return ret_role; |
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475 | } |
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476 | |
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477 | abac_role_t *validate_head_role(abac_yy_role_expression_t *expr) |
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478 | { |
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479 | abac_yy_principal_t *principal=expr->principal; |
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480 | abac_yy_role_t *role=expr->role; |
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481 | |
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482 | char *principalname=principal->sha; |
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483 | char *rolename=role->name; |
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484 | abac_yy_dterm_t *dterms=role->dterms; |
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485 | abac_role_t *ret_role=NULL; |
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486 | |
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487 | ret_role=abac_role_role_new(principalname, rolename); |
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488 | if (ret_role==NULL) { |
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489 | set_error_code(ABAC_RT_ROLE_INVALID); |
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490 | goto error; |
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491 | } |
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492 | if (!abac_role_is_role(ret_role)) { |
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493 | set_error_code(ABAC_RT_CERT_INVALID); |
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494 | goto error; |
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495 | } |
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496 | // insert the params for the role |
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497 | if(dterms) { |
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498 | _role_add_role_dterms(ret_role, dterms); |
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499 | } |
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500 | |
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501 | _add_yy_id_certs(principal->cn,principal->type); |
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502 | |
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503 | return ret_role; |
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504 | |
---|
505 | error: |
---|
506 | return NULL; |
---|
507 | } |
---|
508 | |
---|
509 | abac_role_t *validate_named_tail_role(abac_yy_role_expression_t *expr) |
---|
510 | { |
---|
511 | abac_yy_principal_t *principal=expr->principal; |
---|
512 | char *principalname=principal->sha; |
---|
513 | abac_role_t *ret_role=NULL; |
---|
514 | |
---|
515 | ret_role = abac_role_principal_new(principalname); |
---|
516 | |
---|
517 | _add_yy_id_certs(principal->cn,principal->type); |
---|
518 | |
---|
519 | if (ret_role==NULL) |
---|
520 | goto error; |
---|
521 | return ret_role; |
---|
522 | |
---|
523 | error: |
---|
524 | panic("can not generate a simple named tail role"); |
---|
525 | return NULL; |
---|
526 | } |
---|
527 | |
---|
528 | abac_role_t *validate_role_tail_role(abac_yy_role_expression_t *expr) |
---|
529 | { |
---|
530 | abac_yy_principal_t *principal=expr->principal; |
---|
531 | abac_yy_role_t *role=expr->role; |
---|
532 | |
---|
533 | char *principalname=principal->sha; |
---|
534 | |
---|
535 | char *rolename=role->name; |
---|
536 | abac_yy_dterm_t *dterms=role->dterms; |
---|
537 | |
---|
538 | int ret; |
---|
539 | abac_role_t *ret_role=NULL; |
---|
540 | |
---|
541 | ret_role = abac_role_role_new(principalname, rolename); |
---|
542 | if (ret_role==NULL) |
---|
543 | goto error; |
---|
544 | |
---|
545 | if(dterms) { |
---|
546 | _role_add_role_dterms(ret_role, dterms); |
---|
547 | } |
---|
548 | |
---|
549 | _add_yy_id_certs(principal->cn,principal->type); |
---|
550 | |
---|
551 | return ret_role; |
---|
552 | |
---|
553 | error: |
---|
554 | panic("can not generate a simple tail role"); |
---|
555 | return NULL; |
---|
556 | } |
---|
557 | /* need to validate/generate a linked role out of this */ |
---|
558 | abac_role_t *validate_linked_tail_role(abac_yy_role_expression_t *expr) |
---|
559 | { |
---|
560 | abac_yy_principal_t *principal=expr->principal; |
---|
561 | abac_yy_role_t *role=expr->role; |
---|
562 | abac_yy_role_t *linked_role=expr->linked_role; |
---|
563 | |
---|
564 | char *principalname=principal->sha; |
---|
565 | |
---|
566 | char *rolename=role->name; |
---|
567 | abac_yy_dterm_t *dterms=role->dterms; |
---|
568 | |
---|
569 | char *linkedrolename=linked_role->name; |
---|
570 | abac_yy_dterm_t *linked_dterms=linked_role->dterms; |
---|
571 | |
---|
572 | int ret; |
---|
573 | abac_role_t *ret_role=NULL; |
---|
574 | |
---|
575 | ret_role = abac_role_linking_new(principalname, linkedrolename, rolename); |
---|
576 | if (ret_role==NULL) |
---|
577 | goto error; |
---|
578 | |
---|
579 | if(linked_dterms) { |
---|
580 | _role_add_linked_dterms(ret_role, linked_dterms); |
---|
581 | } |
---|
582 | if(dterms) { |
---|
583 | _role_add_role_dterms(ret_role, dterms); |
---|
584 | } |
---|
585 | |
---|
586 | _add_yy_id_certs(principal->cn,principal->type); |
---|
587 | |
---|
588 | return ret_role; |
---|
589 | |
---|
590 | error: |
---|
591 | panic("can not generate linked tail role"); |
---|
592 | return NULL; |
---|
593 | } |
---|
594 | |
---|
595 | |
---|
596 | abac_list_t *make_statement(abac_yy_role_expression_t *headexpr, |
---|
597 | abac_yy_role_expression_t *tailexpr) |
---|
598 | { |
---|
599 | abac_role_t *head_role=NULL; |
---|
600 | abac_role_t *tail_role=NULL; |
---|
601 | |
---|
602 | /* build up left side's abac role structure */ |
---|
603 | head_role=validate_head_role(headexpr); |
---|
604 | if(head_role == NULL) |
---|
605 | goto error; |
---|
606 | |
---|
607 | /* build up the right side's abac role structure */ |
---|
608 | abac_yy_role_expression_t *curr_tail = tailexpr; |
---|
609 | int intersecting=(tailexpr->next != NULL)? 1:0; |
---|
610 | abac_role_t *curr_role = NULL; |
---|
611 | while (curr_tail) { |
---|
612 | switch(curr_tail->rtype) { |
---|
613 | case EXPR_NAMED: |
---|
614 | curr_role=validate_named_tail_role(curr_tail); |
---|
615 | break; |
---|
616 | case EXPR_ROLE: |
---|
617 | curr_role=validate_role_tail_role(curr_tail); |
---|
618 | break; |
---|
619 | case EXPR_LINKED: |
---|
620 | curr_role=validate_linked_tail_role(curr_tail); |
---|
621 | break; |
---|
622 | } |
---|
623 | if(curr_role==NULL) |
---|
624 | goto error; |
---|
625 | |
---|
626 | /* check if first one */ |
---|
627 | if(tail_role==NULL) { |
---|
628 | if(intersecting) |
---|
629 | tail_role=validate_intersected_tail_role(curr_role); |
---|
630 | else |
---|
631 | tail_role=curr_role; |
---|
632 | } else { |
---|
633 | abac_role_add_intersecting_role(tail_role,curr_role); |
---|
634 | } |
---|
635 | curr_tail=curr_tail->next; |
---|
636 | } /* while */ |
---|
637 | |
---|
638 | /* collect up type clauses and generate rule clauses */ |
---|
639 | abac_list_t *tmp=generate_pl_clauses(head_role,tail_role); |
---|
640 | if(tmp == NULL) |
---|
641 | goto error; |
---|
642 | |
---|
643 | if(debug) { |
---|
644 | abac_print_role_string_with_condition(head_role); |
---|
645 | abac_print_role_string_with_condition(tail_role); |
---|
646 | } |
---|
647 | |
---|
648 | _free_yy_role_expression(headexpr); |
---|
649 | _free_yy_role_expression(tailexpr); |
---|
650 | abac_yap_head_role=head_role; |
---|
651 | abac_yap_tail_role=tail_role; |
---|
652 | return tmp; |
---|
653 | |
---|
654 | error: |
---|
655 | _free_yy_role_expression(headexpr); |
---|
656 | _free_yy_role_expression(tailexpr); |
---|
657 | if(head_role) |
---|
658 | abac_role_free(head_role); |
---|
659 | if(tail_role) |
---|
660 | abac_role_free(tail_role); |
---|
661 | return NULL; |
---|
662 | } |
---|