keychain/securityd/SecDbItem.h

   1 /*
   2  * Copyright (c) 2012-2014 Apple Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 /*!
  25  @header SecDbItem
  26  The functions provided in SecDbItem provide an interface to
  27  database items (certificates, keys, identities, and passwords).
  28  */
  29
  30 #ifndef _SECURITYD_SECDBITEM_H_
  31 #define _SECURITYD_SECDBITEM_H_
  32
  33 #include <CoreFoundation/CoreFoundation.h>
  34 #include <TargetConditionals.h>
  35 #include <corecrypto/ccsha1.h> // For CCSHA1_OUTPUT_SIZE
  36 #include <sqlite3.h>
  37 #include "utilities/SecCFError.h"
  38 #include "utilities/SecCFWrappers.h"
  39 #include "utilities/SecDb.h"
  40 #include "keychain/securityd/SecKeybagSupport.h"
  41 #include <Security/SecAccessControl.h>
  42 #include <Security/SecBasePriv.h>
  43
  44 // MARK SecDbAttrKind, SecDbFlag
  45
  46 typedef enum {
  47     kSecDbBlobAttr,  // CFString or CFData, preserves caller provided type.
  48     kSecDbDataAttr,
  49     kSecDbStringAttr,
  50     kSecDbNumberAttr,
  51     kSecDbDateAttr,
  52     kSecDbCreationDateAttr,
  53     kSecDbModificationDateAttr,
  54     kSecDbSHA1Attr,
  55     kSecDbRowIdAttr,
  56     kSecDbEncryptedDataAttr,
  57     kSecDbPrimaryKeyAttr,
  58     kSecDbSyncAttr,
  59     kSecDbTombAttr,
  60     kSecDbUTombAttr,
  61     kSecDbAccessAttr,
  62     kSecDbAccessControlAttr,
  63     kSecDbUUIDAttr,
  64 } SecDbAttrKind;
  65
  66 enum {
  67     kSecDbPrimaryKeyFlag    = (1 <<  0),    // attr is part of primary key
  68     kSecDbInFlag            = (1 <<  1),    // attr exists in db
  69     kSecDbIndexFlag         = (1 <<  2),    // attr should have a db index
  70     kSecDbSHA1ValueInFlag   = (1 <<  3),    // col in db is sha1 of attr value
  71     kSecDbReturnAttrFlag    = (1 <<  4),
  72     kSecDbReturnDataFlag    = (1 <<  5),
  73     kSecDbReturnRefFlag     = (1 <<  6),
  74     kSecDbInCryptoDataFlag  = (1 <<  7),
  75     kSecDbInHashFlag        = (1 <<  8),
  76     kSecDbInBackupFlag      = (1 <<  9),
  77     kSecDbDefault0Flag      = (1 << 10),    // default attr value is 0
  78     kSecDbDefaultEmptyFlag  = (1 << 11),    // default attr value is ""
  79     kSecDbNotNullFlag       = (1 << 12),    // attr value can't be null
  80     kSecDbInAuthenticatedDataFlag = (1 << 13), // attr is in authenticated data
  81     kSecDbSyncPrimaryKeyV0  = (1 << 14),
  82     kSecDbSyncPrimaryKeyV2  = (1 << 15),
  83     kSecDbSyncFlag          = (1 << 16),
  84 };
  85
  86 #define SecVersionDbFlag(v) ((v & 0xFF) << 8)
  87
  88 #define SecDbFlagGetVersion(flags) ((flags >> 8) & 0xFF)
  89
  90 #define SECDB_ATTR(var, name, kind, flags, copyValue, setValue) const SecDbAttr var = { CFSTR(name), kSecDb ## kind ## Attr, flags, copyValue, setValue }
  91
  92 typedef struct SecDbItem *SecDbItemRef;
  93 typedef struct SecDbAttr SecDbAttr;
  94
  95 typedef CFTypeRef (*SecDbItemCopyAttrValue)(SecDbItemRef item, const SecDbAttr *attr, CFErrorRef *error);
  96 typedef bool (*SecDbItemSetAttrValue)(SecDbItemRef item, const SecDbAttr *desc, CFTypeRef value, CFErrorRef *error);
  97
  98 struct SecDbAttr {
  99     CFStringRef name;
 100     SecDbAttrKind kind;
 101     CFOptionFlags flags;
 102     SecDbItemCopyAttrValue copyValue;
 103     SecDbItemSetAttrValue setValue;
 104 };
 105
 106 typedef struct SecDbClass {
 107     CFStringRef name;
 108     bool itemclass; // true if keychain items are stored in this class, false otherwise
 109     const SecDbAttr *attrs[];
 110 } SecDbClass;
 111
 112 typedef struct SecDbSchema {
 113     int majorVersion;
 114     int minorVersion;
 115     const SecDbClass *classes[];
 116 } SecDbSchema;
 117
 118
 119 #define SecDbForEachAttr(class, attr) for (const SecDbAttr * const* _pattr = (class)->attrs, *attr = *_pattr; attr; attr = *(++_pattr))
 120
 121 #define SecDbForEachAttrWithMask(class, attr, flag_mask) SecDbForEachAttr(class, attr) if ((attr->flags & (flag_mask)) == (flag_mask))
 122
 123 CFTypeRef SecDbAttrCopyDefaultValue(const SecDbAttr *attr, CFErrorRef *error);
 124
 125
 126 // MARK: SecDbItem
 127
 128 enum SecDbItemState {
 129     kSecDbItemDirty,          // We have no edata (or if we do it's invalid), attributes are the truth
 130     kSecDbItemEncrypted,      // Attributes haven't been decrypted yet from edata
 131     kSecDbItemClean,          // Attributes and _edata are in sync.
 132     kSecDbItemDecrypting,     // Temporary state while we are decrypting so set knows not to blow away the edata.
 133     kSecDbItemEncrypting,     // Temporary state while we are encrypting so set knows to move to clean.
 134     kSecDbItemAlwaysEncrypted, // As kSecDbItemEncrypted, but decryption is never attempted
 135     kSecDbItemSecretEncrypted, // Metadata is clean, but the secret data remains encrypted
 136 };
 137
 138 struct SecDbItem {
 139     CFRuntimeBase _base;
 140     const SecDbClass *class;
 141     keyclass_t keyclass;
 142     keybag_handle_t keybag;
 143     enum SecDbItemState _edataState;
 144     CFMutableDictionaryRef attributes;
 145     CFDataRef credHandle;
 146     CFTypeRef cryptoOp;
 147     CFArrayRef callerAccessGroups;
 148 };
 149
 150 // TODO: Make this a callback to client
 151 bool SecDbItemDecrypt(SecDbItemRef item, bool decryptSecretData, CFDataRef edata, CFErrorRef *error);
 152
 153 CFTypeID SecDbItemGetTypeID(void);
 154
 155 static inline size_t SecDbClassAttrCount(const SecDbClass *dbClass) {
 156     size_t n_attrs = 0;
 157     SecDbForEachAttr(dbClass, attr) { n_attrs++; }
 158     return n_attrs;
 159 }
 160
 161 const SecDbAttr *SecDbClassAttrWithKind(const SecDbClass *class, SecDbAttrKind kind, CFErrorRef *error);
 162
 163 SecDbItemRef SecDbItemCreateWithAttributes(CFAllocatorRef allocator, const SecDbClass *class, CFDictionaryRef attributes, keybag_handle_t keybag, CFErrorRef *error);
 164
 165 const SecDbClass *SecDbItemGetClass(SecDbItemRef item);
 166 keybag_handle_t SecDbItemGetKeybag(SecDbItemRef item);
 167 bool SecDbItemSetKeybag(SecDbItemRef item, keybag_handle_t keybag, CFErrorRef *error);
 168 void SecDbItemSetCredHandle(SecDbItemRef item, CFTypeRef cred_handle);
 169 void SecDbItemSetCallerAccessGroups(SecDbItemRef item, CFArrayRef caller_access_groups);
 170
 171 CFTypeRef SecDbItemGetCachedValueWithName(SecDbItemRef item, CFStringRef name);
 172 CFTypeRef SecDbItemGetValue(SecDbItemRef item, const SecDbAttr *desc, CFErrorRef *error);
 173 CFTypeRef SecDbItemGetValueKind(SecDbItemRef item, SecDbAttrKind desc, CFErrorRef *error);
 174
 175 bool SecDbItemSetValue(SecDbItemRef item, const SecDbAttr *desc, CFTypeRef value, CFErrorRef *error);
 176 bool SecDbItemSetValues(SecDbItemRef item, CFDictionaryRef values, CFErrorRef *error);
 177 bool SecDbItemSetValueWithName(SecDbItemRef item, CFStringRef name, CFTypeRef value, CFErrorRef *error);
 178
 179 sqlite3_int64 SecDbItemGetRowId(SecDbItemRef item, CFErrorRef *error);
 180 bool SecDbItemSetRowId(SecDbItemRef item, sqlite3_int64 rowid, CFErrorRef *error);
 181 bool SecDbItemClearRowId(SecDbItemRef item, CFErrorRef *error);
 182
 183 bool SecDbItemIsSyncableOrCorrupted(SecDbItemRef item);
 184 bool SecDbItemIsSyncable(SecDbItemRef item);
 185
 186 bool SecDbItemSetSyncable(SecDbItemRef item, bool sync, CFErrorRef *error);
 187
 188 bool SecDbItemIsTombstone(SecDbItemRef item);
 189
 190 CFMutableDictionaryRef SecDbItemCopyPListWithMask(SecDbItemRef item, CFOptionFlags mask, CFErrorRef *error);
 191
 192 CFDataRef SecDbItemGetPrimaryKey(SecDbItemRef item, CFErrorRef *error);
 193 CFDataRef SecDbItemGetSHA1(SecDbItemRef item, CFErrorRef *error);
 194
 195 CFDataRef SecDbItemCopyEncryptedDataToBackup(SecDbItemRef item, uint64_t handle, CFErrorRef *error);
 196
 197 SecDbItemRef SecDbItemCreateWithStatement(CFAllocatorRef allocator, const SecDbClass *class, sqlite3_stmt *stmt, keybag_handle_t keybag, CFErrorRef *error, bool (^return_attr)(const SecDbAttr *attr));
 198
 199 SecDbItemRef SecDbItemCreateWithEncryptedData(CFAllocatorRef allocator, const SecDbClass *class,
 200                                               CFDataRef edata, keybag_handle_t keybag, CFErrorRef *error);
 201
 202 SecDbItemRef SecDbItemCreateWithPrimaryKey(CFAllocatorRef allocator, const SecDbClass *class, CFDataRef primary_key);
 203
 204 #if 0
 205 SecDbItemRef SecDbItemCreateWithRowId(CFAllocatorRef allocator, const SecDbClass *class, sqlite_int64 row_id, keybag_handle_t keybag, CFErrorRef *error);
 206 #endif
 207
 208 bool SecDbItemEnsureDecrypted(SecDbItemRef item, bool decryptSecretData, CFErrorRef *error);
 209
 210 SecDbItemRef SecDbItemCopyWithUpdates(SecDbItemRef item, CFDictionaryRef updates, CFErrorRef *error);
 211
 212 bool SecDbItemInsertOrReplace(SecDbItemRef item, SecDbConnectionRef dbconn, CFErrorRef *error, void(^duplicate)(SecDbItemRef item, SecDbItemRef *replace));
 213
 214 // SecDbItemInsertOrReplace returns an error even when it succeeds; use this to determine if it's spurious
 215 bool SecErrorIsSqliteDuplicateItemError(CFErrorRef error);
 216
 217 bool SecDbItemInsert(SecDbItemRef item, SecDbConnectionRef dbconn, CFErrorRef *error);
 218
 219 bool SecDbItemDelete(SecDbItemRef item, SecDbConnectionRef dbconn, CFBooleanRef makeTombstone, CFErrorRef *error);
 220
 221 bool SecDbItemDoDeleteSilently(SecDbItemRef item, SecDbConnectionRef dbconn, CFErrorRef *error);
 222
 223 // Low level update, just do the update
 224 bool SecDbItemDoUpdate(SecDbItemRef old_item, SecDbItemRef new_item, SecDbConnectionRef dbconn, CFErrorRef *error, bool (^use_attr_in_where)(const SecDbAttr *attr));
 225
 226 // High level update, will replace tombstones and create them if needed.
 227 bool SecDbItemUpdate(SecDbItemRef old_item, SecDbItemRef new_item, SecDbConnectionRef dbconn, CFBooleanRef makeTombstone, bool uuid_from_primary_key, CFErrorRef *error);
 228
 229
 230 // MARK: -
 231 // MARK: SQL Construction helpers -- These should become private in the future
 232
 233 void SecDbAppendElement(CFMutableStringRef sql, CFStringRef value, bool *needComma);
 234 void SecDbAppendWhereOrAnd(CFMutableStringRef sql, bool *needWhere);
 235 void SecDbAppendWhereOrAndEquals(CFMutableStringRef sql, CFStringRef col, bool *needWhere);
 236 void SecDbAppendWhereOrAndNotEquals(CFMutableStringRef sql, CFStringRef col, bool *needWhere);
 237 void SecDbAppendWhereOrAndIn(CFMutableStringRef sql, CFStringRef col, bool *needWhere, CFIndex count);
 238 void SecDbAppendWhereOrAndNotIn(CFMutableStringRef sql, CFStringRef col, bool *needWhere, CFIndex count);
 239
 240 // MARK: type converters.
 241 // TODO: these should be static and private to SecDbItem, or part of the schema
 242
 243 CFStringRef copyString(CFTypeRef obj);
 244 CFDataRef copyData(CFTypeRef obj);
 245 CFTypeRef copyBlob(CFTypeRef obj);
 246 CFDataRef copySHA1(CFTypeRef obj);
 247 CFTypeRef copyNumber(CFTypeRef obj);
 248 CFDateRef copyDate(CFTypeRef obj);
 249 CFTypeRef copyUUID(CFTypeRef obj);
 250
 251 // MARK: cFErrorPropagate which handles errSecAuthNeeded
 252 static inline
 253 bool SecErrorPropagate(CFErrorRef possibleError CF_CONSUMED, CFErrorRef *error) {
 254     if (possibleError && error && *error && CFErrorGetCode(*error) == errSecAuthNeeded)
 255         CFReleaseNull(*error);
 256     return CFErrorPropagate(possibleError, error);
 257 }
 258
 259 // TODO: Hack
 260 bool SecDbItemInV2(SecDbItemRef item);
 261 bool SecDbItemInV2AlsoInV0(SecDbItemRef item);
 262
 263 // For debug output filtering
 264 bool SecDbItemIsEngineInternalState(SecDbItemRef itemObject);
 265
 266 __END_DECLS
 267
 268 #endif /* _SECURITYD_SECDBITEM_H_ */