1/*
2 * Copyright (c) 2000-2001,2004,2011-2012,2014 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//
26// PrimaryKey.cpp
27//
28
29#include "PrimaryKey.h"
30
31using namespace KeychainCore;
32using namespace CssmClient;
33
34
35PrimaryKeyImpl::PrimaryKeyImpl(const CSSM_DATA &data)
36: CssmDataContainer(data.Data, data.Length), mMutex(Mutex::recursive)
37{
38
39//@@@ do bounds checking here, throw if invalid
40
41}
42
43PrimaryKeyImpl::PrimaryKeyImpl(const DbAttributes &primaryKeyAttrs) : mMutex(Mutex::recursive)
44{
45	Length = sizeof(uint32);
46	for (uint32 ix = 0; ix < primaryKeyAttrs.size(); ++ix)
47	{
48		if (primaryKeyAttrs.at(ix).size() == 0)
49			MacOSError::throwMe(errSecInvalidKeychain);
50
51		Length += sizeof(uint32) + primaryKeyAttrs.at(ix).Value[0].Length;
52	}
53
54	// Careful with exceptions
55	Data = mAllocator.alloc<uint8>((UInt32)Length);
56	uint8 *p = Data;
57
58	putUInt32(p, primaryKeyAttrs.recordType());
59	for (uint32 ix = 0; ix < primaryKeyAttrs.size(); ++ix)
60	{
61		UInt32 len = (UInt32)primaryKeyAttrs.at(ix).Value[0].Length;
62		putUInt32(p, len);
63		memcpy(p, primaryKeyAttrs.at(ix).Value[0].Data, len);
64		p += len;
65	}
66}
67
68CssmClient::DbCursor
69PrimaryKeyImpl::createCursor(const Keychain &keychain)
70{
71	StLock<Mutex>_(mMutex);
72	DbCursor cursor(keychain->database());
73
74	// @@@ Set up cursor to find item with this.
75	uint8 *p = Data;
76	uint32 left = (uint32)Length;
77	if (left < sizeof(*p))
78		MacOSError::throwMe(errSecNoSuchAttr); // XXX Not really but whatever.
79
80	CSSM_DB_RECORDTYPE rt = getUInt32(p, left);
81	const CssmAutoDbRecordAttributeInfo &infos = keychain->primaryKeyInfosFor(rt);
82
83	cursor->recordType(rt);
84	cursor->conjunctive(CSSM_DB_AND);
85	for (uint32 ix = 0; ix < infos.size(); ++ix)
86	{
87		uint32 len = getUInt32(p, left);
88
89		if (left < len)
90			MacOSError::throwMe(errSecNoSuchAttr); // XXX Not really but whatever.
91
92		CssmData value(p, len);
93		left -= len;
94		p += len;
95
96		cursor->add(CSSM_DB_EQUAL, infos.at(ix), value);
97	}
98
99	return cursor;
100}
101
102
103void
104PrimaryKeyImpl::putUInt32(uint8 *&p, uint32 value)
105{
106	*p++ = (value >> 24);
107	*p++ = (value >> 16) & 0xff;
108	*p++ = (value >> 8) & 0xff;
109	*p++ = value & 0xff;
110}
111
112uint32
113PrimaryKeyImpl::getUInt32(uint8 *&p, uint32 &left) const
114{
115	if (left < sizeof(uint32))
116		MacOSError::throwMe(errSecNoSuchAttr); // XXX Not really but whatever.
117
118
119	// @@@ Assumes data written in big endian.
120	uint32 value = (p[0] << 24) + (p[1] << 16) + (p[2] << 8) + p[3];
121	p += sizeof(uint32);
122	left -= sizeof(uint32);
123	return value;
124}
125
126
127
128CSSM_DB_RECORDTYPE
129PrimaryKeyImpl::recordType() const
130{
131	uint8 *data = Data;
132	uint32 length = (uint32)Length;
133	return getUInt32(data, length);
134}
135