keychainAPI.m revision ca0b57e07cfa029d4a6a061260727625bd833fd4 
1// RUN: %clang_cc1 -analyze -analyzer-checker=experimental.osx.KeychainAPI %s -verify
2
3// Fake typedefs.
4typedef unsigned int OSStatus;
5typedef unsigned int SecKeychainAttributeList;
6typedef unsigned int SecKeychainItemRef;
7typedef unsigned int SecItemClass;
8typedef unsigned int UInt32;
9typedef unsigned int CFTypeRef;
10typedef unsigned int UInt16;
11typedef unsigned int SecProtocolType;
12typedef unsigned int SecAuthenticationType;
13typedef unsigned int SecKeychainAttributeInfo;
14enum {
15  noErr                      = 0,
16  GenericError               = 1
17};
18
19// Functions that allocate data.
20OSStatus SecKeychainItemCopyContent (
21    SecKeychainItemRef itemRef,
22    SecItemClass *itemClass,
23    SecKeychainAttributeList *attrList,
24    UInt32 *length,
25    void **outData
26);
27OSStatus SecKeychainFindGenericPassword (
28    CFTypeRef keychainOrArray,
29    UInt32 serviceNameLength,
30    const char *serviceName,
31    UInt32 accountNameLength,
32    const char *accountName,
33    UInt32 *passwordLength,
34    void **passwordData,
35    SecKeychainItemRef *itemRef
36);
37OSStatus SecKeychainFindInternetPassword (
38    CFTypeRef keychainOrArray,
39    UInt32 serverNameLength,
40    const char *serverName,
41    UInt32 securityDomainLength,
42    const char *securityDomain,
43    UInt32 accountNameLength,
44    const char *accountName,
45    UInt32 pathLength,
46    const char *path,
47    UInt16 port,
48    SecProtocolType protocol,
49    SecAuthenticationType authenticationType,
50    UInt32 *passwordLength,
51    void **passwordData,
52    SecKeychainItemRef *itemRef
53);
54OSStatus SecKeychainItemCopyAttributesAndData (
55   SecKeychainItemRef itemRef,
56   SecKeychainAttributeInfo *info,
57   SecItemClass *itemClass,
58   SecKeychainAttributeList **attrList,
59   UInt32 *length,
60   void **outData
61);
62
63// Functions which free data.
64OSStatus SecKeychainItemFreeContent (
65    SecKeychainAttributeList *attrList,
66    void *data
67);
68OSStatus SecKeychainItemFreeAttributesAndData (
69   SecKeychainAttributeList *attrList,
70   void *data
71);
72
73void errRetVal() {
74	unsigned int *ptr = 0;
75	OSStatus st = 0;
76	UInt32 length;
77	void *outData;
78	st = SecKeychainItemCopyContent(2, ptr, ptr, &length, &outData);
79	if (st == GenericError) // expected-warning{{Allocated data is not released: missing a call to 'SecKeychainItemFreeContent'.}}
80		SecKeychainItemFreeContent(ptr, outData); // expected-warning{{Trying to free data which has not been allocated.}}
81}
82
83// If null is passed in, the data is not allocated, so no need for the matching free.
84void fooDoNotReportNull() {
85    unsigned int *ptr = 0;
86    OSStatus st = 0;
87    UInt32 *length = 0;
88    void **outData = 0;
89    SecKeychainItemCopyContent(2, ptr, ptr, 0, 0);
90    SecKeychainItemCopyContent(2, ptr, ptr, length, outData);
91}// no-warning
92
93void doubleAlloc() {
94    unsigned int *ptr = 0;
95    OSStatus st = 0;
96    UInt32 length;
97    void *outData;
98    st = SecKeychainItemCopyContent(2, ptr, ptr, &length, &outData);
99    st = SecKeychainItemCopyContent(2, ptr, ptr, &length, &outData); // expected-warning {{Allocated data should be released before another call to the allocator:}}
100    if (st == noErr)
101      SecKeychainItemFreeContent(ptr, outData);
102}
103
104void fooOnlyFree() {
105  unsigned int *ptr = 0;
106  OSStatus st = 0;
107  UInt32 length;
108  void *outData = &length;
109  SecKeychainItemFreeContent(ptr, outData);// expected-warning{{Trying to free data which has not been allocated}}
110}
111
112// Do not warn if undefined value is passed to a function.
113void fooOnlyFreeUndef() {
114  unsigned int *ptr = 0;
115  OSStatus st = 0;
116  UInt32 length;
117  void *outData;
118  SecKeychainItemFreeContent(ptr, outData);
119}// no-warning
120
121// Do not warn if the address is a parameter in the enclosing function.
122void fooOnlyFreeParam(void *attrList, void* X) {
123    SecKeychainItemFreeContent(attrList, X); 
124}// no-warning
125
126// If we are returning the value, no not report.
127void* returnContent() {
128  unsigned int *ptr = 0;
129  OSStatus st = 0;
130  UInt32 length;
131  void *outData;
132  st = SecKeychainItemCopyContent(2, ptr, ptr, &length, &outData);
133  return outData;
134} // no-warning
135
136int apiMismatch(SecKeychainItemRef itemRef, 
137         SecKeychainAttributeInfo *info,
138         SecItemClass *itemClass) {
139  OSStatus st = 0;
140  SecKeychainAttributeList *attrList;
141  UInt32 length;
142  void *outData;
143  
144  st = SecKeychainItemCopyAttributesAndData(itemRef, info, itemClass, 
145                                            &attrList, &length, &outData); 
146  if (st == noErr)
147    SecKeychainItemFreeContent(attrList, outData); // expected-warning{{Allocator doesn't match the deallocator}}
148  return 0;
149}
150
151int ErrorCodesFromDifferentAPISDoNotInterfere(SecKeychainItemRef itemRef, 
152                                              SecKeychainAttributeInfo *info,
153                                              SecItemClass *itemClass) {
154  unsigned int *ptr = 0;
155  OSStatus st = 0;
156  UInt32 length;
157  void *outData;
158  OSStatus st2 = 0;
159  SecKeychainAttributeList *attrList;
160  UInt32 length2;
161  void *outData2;
162
163  st2 = SecKeychainItemCopyAttributesAndData(itemRef, info, itemClass, 
164                                             &attrList, &length2, &outData2);
165  st = SecKeychainItemCopyContent(2, ptr, ptr, &length, &outData);  
166  if (st == noErr) {
167    SecKeychainItemFreeContent(ptr, outData);
168    if (st2 == noErr) {
169      SecKeychainItemFreeAttributesAndData(attrList, outData2);
170    }
171  } 
172  return 0; // expected-warning{{Allocated data is not released: missing a call to 'SecKeychainItemFreeAttributesAndData'}}
173}
174
175int foo() {
176  unsigned int *ptr = 0;
177  OSStatus st = 0;
178
179  UInt32 length;
180  void *outData;
181
182  st = SecKeychainItemCopyContent(2, ptr, ptr, &length, &outData);
183  if (st == noErr)
184    SecKeychainItemFreeContent(ptr, outData);
185
186  return 0;
187}// no-warning
188