Security/authd/authutilities.c

   1 /* Copyright (c) 2012-2013 Apple Inc. All Rights Reserved. */
   2
   3 #include "authutilities.h"
   4 #include "authd_private.h"
   5 #include "debugging.h"
   6
   7 #include <AssertMacros.h>
   8 #include <assert.h>
   9 #include <syslog.h>
  10
  11 xpc_object_t
  12 SerializeItemSet(const AuthorizationItemSet * itemSet)
  13 {
  14     xpc_object_t set = NULL;
  15     require_quiet(itemSet != NULL, done);
  16     require_quiet(itemSet->count != 0, done);
  17
  18     set = xpc_array_create(NULL, 0);
  19     require(set != NULL, done);
  20
  21     for (uint32_t i = 0; i < itemSet->count; i++) {
  22         xpc_object_t item = xpc_dictionary_create(NULL, NULL, 0);
  23         require(item != NULL, done);
  24
  25         xpc_dictionary_set_string(item, AUTH_XPC_ITEM_NAME, itemSet->items[i].name);
  26         xpc_dictionary_set_uint64(item, AUTH_XPC_ITEM_FLAGS, itemSet->items[i].flags);
  27         xpc_dictionary_set_data(item, AUTH_XPC_ITEM_VALUE, itemSet->items[i].value, itemSet->items[i].valueLength);
  28         xpc_array_set_value(set, XPC_ARRAY_APPEND, item);
  29         xpc_release(item);
  30     }
  31
  32 done:
  33     return set;
  34 }
  35
  36 AuthorizationItemSet *
  37 DeserializeItemSet(const xpc_object_t data)
  38 {
  39     AuthorizationItemSet * set = NULL;
  40     require_quiet(data != NULL, done);
  41     xpc_retain(data);
  42     require(xpc_get_type(data) == XPC_TYPE_ARRAY, done);
  43
  44     set = (AuthorizationItemSet*)calloc(1u, sizeof(AuthorizationItemSet));
  45     require(set != NULL, done);
  46
  47     set->count = (uint32_t)xpc_array_get_count(data);
  48     if (set->count) {
  49         set->items = (AuthorizationItem*)calloc(set->count, sizeof(AuthorizationItem));
  50         require_action(set->items != NULL, done, set->count = 0);
  51
  52         xpc_array_apply(data, ^bool(size_t index, xpc_object_t value) {
  53             require(xpc_get_type(value) == XPC_TYPE_DICTIONARY, done);
  54             size_t nameLen = 0;
  55             const char * name = xpc_dictionary_get_string(value, AUTH_XPC_ITEM_NAME);
  56             if (name) {
  57                 nameLen = strlen(name) + 1;
  58                 set->items[index].name = calloc(1u, nameLen);
  59                 require(set->items[index].name != NULL, done);
  60
  61                 strlcpy((char*)set->items[index].name, name, nameLen);
  62             }
  63             set->items[index].flags = (uint32_t)xpc_dictionary_get_uint64(value, AUTH_XPC_ITEM_FLAGS);
  64             size_t len;
  65             const void * valueData = xpc_dictionary_get_data(value, AUTH_XPC_ITEM_VALUE, &len);
  66             set->items[index].valueLength = len;
  67             if (len) {
  68                 set->items[index].value = calloc(1u, len);
  69                 require(set->items[index].value != NULL, done);
  70
  71                 memcpy(set->items[index].value, valueData, len);
  72             }
  73         done:
  74             return true;
  75         });
  76     }
  77
  78 done:
  79     if (data != NULL) {
  80         xpc_release(data);
  81     }
  82     return set;
  83 }
  84
  85 void FreeItemSet(AuthorizationItemSet * itemSet)
  86 {
  87     if (!itemSet) { return; }
  88
  89     for(uint32_t i = 0; i < itemSet->count; i++ ) {
  90         if (itemSet->items[i].name) {
  91             free((void*)itemSet->items[i].name);
  92         }
  93         if (itemSet->items[i].value) {
  94             free(itemSet->items[i].value);
  95         }
  96     }
  97     if (itemSet->items) {
  98         free(itemSet->items);
  99     }
 100
 101     free(itemSet);
 102 }
 103
 104 char *
 105 _copy_cf_string(CFTypeRef str, const char * defaultValue)
 106 {
 107     char * result = NULL;
 108     require(str != NULL, done);
 109     require(CFGetTypeID(str) == CFStringGetTypeID(), done);
 110
 111     CFIndex length = CFStringGetLength(str);
 112     CFIndex size = CFStringGetMaximumSizeForEncoding(length, kCFStringEncodingUTF8) + 1;
 113
 114     result = (char*)calloc(1u, (size_t)size);
 115     check(result != NULL);
 116
 117     if (!CFStringGetCString(str, result, size, kCFStringEncodingUTF8)) {
 118         free_safe(result);
 119     }
 120
 121 done:
 122     if (result == NULL && defaultValue) {
 123         size_t len = strlen(defaultValue);
 124         result = (char*)calloc(1u, len);
 125         check(result != NULL);
 126
 127         strlcpy(result, defaultValue, len);
 128     }
 129
 130     return result;
 131 }
 132
 133 int64_t
 134 _get_cf_int(CFTypeRef num, int64_t defaultValue)
 135 {
 136     int64_t result = defaultValue;
 137     require(num != NULL, done);
 138     require(CFGetTypeID(num) == CFNumberGetTypeID(), done);
 139
 140     if (!CFNumberGetValue(num, kCFNumberSInt64Type, &result)) {
 141         result = defaultValue;
 142     }
 143
 144 done:
 145     return result;
 146 }
 147
 148 bool
 149 _get_cf_bool(CFTypeRef value, bool defaultValue)
 150 {
 151     bool result = defaultValue;
 152     require(value != NULL, done);
 153     require(CFGetTypeID(value) == CFBooleanGetTypeID(), done);
 154
 155     result = CFBooleanGetValue(value);
 156
 157 done:
 158     return result;
 159 }
 160
 161 bool
 162 _compare_string(const char * str1, const char * str2)
 163 {
 164     if (!(str1 == str2)) {  // compare null or same pointer
 165         if (str1 && str2) { // check both are non null
 166             if (strcasecmp(str1, str2) != 0) { // compare strings
 167                 return false; // return false if not equal
 168             }
 169         } else {
 170             return false; // return false if one null
 171         }
 172     }
 173
 174     return true;
 175 }
 176
 177 char *
 178 _copy_string(const char * str)
 179 {
 180     char * result = NULL;
 181     require(str != NULL, done);
 182
 183     size_t len = strlen(str) + 1;
 184     result = calloc(1u, len);
 185     require(result != NULL, done);
 186
 187     strlcpy(result, str, len);
 188
 189 done:
 190     return result;
 191 }
 192
 193 void *
 194 _copy_data(const void * data, size_t dataLen)
 195 {
 196     void * result = NULL;
 197     require(data != NULL, done);
 198
 199     result = calloc(1u, dataLen);
 200     require(result != NULL, done);
 201
 202     memcpy(result, data, dataLen);
 203
 204 done:
 205     return result;
 206 }
 207
 208 bool _cf_set_iterate(CFSetRef set, bool(^iterator)(CFTypeRef value))
 209 {
 210     bool result = false;
 211     CFTypeRef* values = NULL;
 212
 213     require(set != NULL, done);
 214
 215     CFIndex count = CFSetGetCount(set);
 216     values = calloc((size_t)count, sizeof(CFTypeRef));
 217     require(values != NULL, done);
 218
 219     CFSetGetValues(set, values);
 220     for (CFIndex i = 0; i < count; i++) {
 221         result = iterator(values[i]);
 222         if (!result) {
 223             break;
 224         }
 225     }
 226
 227 done:
 228     free_safe(values);
 229     return result;
 230 }
 231
 232 bool _cf_bag_iterate(CFBagRef bag, bool(^iterator)(CFTypeRef value))
 233 {
 234     bool result = false;
 235     CFTypeRef* values = NULL;
 236
 237     require(bag != NULL, done);
 238
 239     CFIndex count = CFBagGetCount(bag);
 240     values = calloc((size_t)count, sizeof(CFTypeRef));
 241     require(values != NULL, done);
 242
 243     CFBagGetValues(bag, values);
 244     for (CFIndex i = 0; i < count; i++) {
 245         result = iterator(values[i]);
 246         if (!result) {
 247             break;
 248         }
 249     }
 250
 251 done:
 252     free_safe(values);
 253     return result;
 254 }
 255
 256 bool _cf_dictionary_iterate(CFDictionaryRef dict, bool(^iterator)(CFTypeRef key, CFTypeRef value))
 257 {
 258     bool result = false;
 259     CFTypeRef* keys = NULL;
 260     CFTypeRef* values = NULL;
 261
 262     require(dict != NULL, done);
 263
 264     CFIndex count = CFDictionaryGetCount(dict);
 265     keys = calloc((size_t)count, sizeof(CFTypeRef));
 266     require(keys != NULL, done);
 267
 268     values = calloc((size_t)count, sizeof(CFTypeRef));
 269     require(values != NULL, done);
 270
 271     CFDictionaryGetKeysAndValues(dict, keys, values);
 272     for (CFIndex i = 0; i < count; i++) {
 273         result = iterator(keys[i], values[i]);
 274         if (!result) {
 275             break;
 276         }
 277     }
 278
 279 done:
 280     free_safe(keys);
 281     free_safe(values);
 282     return result;
 283 }