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crypto/mock_apple_keychain.h

Index: crypto/mock_apple_keychain.h
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+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CRYPTO_MOCK_KEYCHAIN_MAC_H_
+#define CRYPTO_MOCK_KEYCHAIN_MAC_H_
+
+#include <stdint.h>
+
+#include <map>
+#include <set>
+#include <string>
+#include <vector>
+
+#include "base/compiler_specific.h"
+#include "crypto/apple_keychain.h"
+
+namespace crypto {
+
+// Mock Keychain wrapper for testing code that interacts with the OS X
+// Keychain.  Implemented by storing SecKeychainAttributeList and
+// KeychainPasswordData values in separate mutable containers and
+// mapping them to integer keys.
+//
+// Note that "const" is pretty much meaningless for this class; the const-ness
+// of AppleKeychain doesn't apply to the actual keychain data, so all of the
+// Mock data is mutable; don't assume that it won't change over the life of
+// tests.
+class CRYPTO_EXPORT MockAppleKeychain : public AppleKeychain {
+ public:
+  MockAppleKeychain();
+  ~MockAppleKeychain() override;
+
+  // AppleKeychain implementation.
+  OSStatus FindGenericPassword(CFTypeRef keychainOrArray,
+                               UInt32 serviceNameLength,
+                               const char* serviceName,
+                               UInt32 accountNameLength,
+                               const char* accountName,
+                               UInt32* passwordLength,
+                               void** passwordData,
+                               SecKeychainItemRef* itemRef) const override;
+  OSStatus ItemFreeContent(SecKeychainAttributeList* attrList,
+                           void* data) const override;
+  OSStatus AddGenericPassword(SecKeychainRef keychain,
+                              UInt32 serviceNameLength,
+                              const char* serviceName,
+                              UInt32 accountNameLength,
+                              const char* accountName,
+                              UInt32 passwordLength,
+                              const void* passwordData,
+                              SecKeychainItemRef* itemRef) const override;
+
+  // Returns the password that OSCrypt uses to generate its encryption key.
+  std::string GetEncryptionPassword() const;
+
+#if !defined(OS_IOS)
+  OSStatus ItemCopyAttributesAndData(SecKeychainItemRef itemRef,
+                                     SecKeychainAttributeInfo* info,
+                                     SecItemClass* itemClass,
+                                     SecKeychainAttributeList** attrList,
+                                     UInt32* length,
+                                     void** outData) const override;
+  // Pass "fail_me" as the data to get errSecAuthFailed.
+  OSStatus ItemModifyAttributesAndData(SecKeychainItemRef itemRef,
+                                       const SecKeychainAttributeList* attrList,
+                                       UInt32 length,
+                                       const void* data) const override;
+  OSStatus ItemFreeAttributesAndData(SecKeychainAttributeList* attrList,
+                                     void* data) const override;
+  OSStatus ItemDelete(SecKeychainItemRef itemRef) const override;
+  OSStatus SearchCreateFromAttributes(
+      CFTypeRef keychainOrArray,
+      SecItemClass itemClass,
+      const SecKeychainAttributeList* attrList,
+      SecKeychainSearchRef* searchRef) const override;
+  OSStatus SearchCopyNext(SecKeychainSearchRef searchRef,
+                          SecKeychainItemRef* itemRef) const override;
+  // Pass "some.domain.com" as the serverName to get errSecDuplicateItem.
+  OSStatus AddInternetPassword(SecKeychainRef keychain,
+                               UInt32 serverNameLength,
+                               const char* serverName,
+                               UInt32 securityDomainLength,
+                               const char* securityDomain,
+                               UInt32 accountNameLength,
+                               const char* accountName,
+                               UInt32 pathLength,
+                               const char* path,
+                               UInt16 port,
+                               SecProtocolType protocol,
+                               SecAuthenticationType authenticationType,
+                               UInt32 passwordLength,
+                               const void* passwordData,
+                               SecKeychainItemRef* itemRef) const override;
+  void Free(CFTypeRef ref) const override;
+
+  // Return the counts of objects returned by Create/Copy functions but never
+  // Free'd as they should have been.
+  int UnfreedSearchCount() const;
+  int UnfreedKeychainItemCount() const;
+  int UnfreedAttributeDataCount() const;
+
+  // Returns true if all items added with AddInternetPassword have a creator
+  // code set.
+  bool CreatorCodesSetForAddedItems() const;
+
+  struct KeychainTestData {
+    const SecAuthenticationType auth_type;
+    const char* server;
+    const SecProtocolType protocol;
+    const char* path;
+    const UInt32 port;
+    const char* security_domain;
+    const char* creation_date;
+    const char* username;
+    const char* password;
+    const bool negative_item;
+  };
+  // Adds a keychain item with the given info to the test set.
+  void AddTestItem(const KeychainTestData& item_data);
+
+  void set_locked(bool locked) { locked_ = locked; }
+#endif  // !defined(OS_IOS)
+
+  // |FindGenericPassword()| can return different results depending on user
+  // interaction with the system Keychain.  For mocking purposes we allow the
+  // user of this class to specify the result code of the
+  // |FindGenericPassword()| call so we can simulate the result of different
+  // user interactions.
+  void set_find_generic_result(OSStatus result) {
+    find_generic_result_ = result;
+  }
+
+  // Returns the true if |AddGenericPassword()| was called.
+  bool called_add_generic() const { return called_add_generic_; }
+
+  // Returns the value of the password set when |AddGenericPassword()| was
+  // called.
+  std::string add_generic_password() const { return add_generic_password_; }
+
+  // Returns the number of allocations - deallocations for password data.
+  int password_data_count() const { return password_data_count_; }
+
+ private:
+  // Type used for the keys in the std::map(s) and MockAppleKeychain items.
+  typedef uintptr_t MockKeychainItemType;
+
+  // Type of the map holding the mock keychain attributes.
+  typedef std::map<MockKeychainItemType, SecKeychainAttributeList>
+      MockKeychainAttributesMap;
+
+#if !defined(OS_IOS)
+  // Returns true if the keychain already contains a password that matches the
+  // attributes provided.
+  bool AlreadyContainsInternetPassword(
+      UInt32 serverNameLength,
+      const char* serverName,
+      UInt32 securityDomainLength,
+      const char* securityDomain,
+      UInt32 accountNameLength,
+      const char* accountName,
+      UInt32 pathLength,
+      const char* path,
+      UInt16 port,
+      SecProtocolType protocol,
+      SecAuthenticationType authenticationType) const;
+  // Initializes storage for keychain data at |key|.
+  void InitializeKeychainData(MockKeychainItemType key) const;
+  // Sets the data and length of |tag| in the item-th test item.
+  void SetTestDataBytes(
+      MockKeychainItemType item,
+      UInt32 tag,
+      const void* data,
+      size_t length);
+  // Sets the data and length of |tag| in the item-th test item based on
+  // |value|. The null-terminator will not be included; the Keychain Services
+  // docs don't indicate whether it is or not, so clients should not assume
+  // that it will be.
+  void SetTestDataString(MockKeychainItemType item,
+                         UInt32 tag,
+                         const char* value);
+  // Sets the data of the corresponding attribute of the item-th test item to
+  // |value|. Assumes that the space has alread been allocated, and the length
+  // set.
+  void SetTestDataPort(MockKeychainItemType item, UInt32 value);
+  void SetTestDataProtocol(MockKeychainItemType item, SecProtocolType value);
+  void SetTestDataAuthType(MockKeychainItemType item,
+                           SecAuthenticationType value);
+  void SetTestDataNegativeItem(MockKeychainItemType item, Boolean value);
+  void SetTestDataCreator(MockKeychainItemType item, OSType value);
+  // Sets the password data and length for the item-th test item.
+  void SetTestDataPasswordBytes(MockKeychainItemType item,
+                                const void* data,
+                                size_t length);
+  // Sets the password for the item-th test item. As with SetTestDataString,
+  // the data will not be null-terminated.
+  void SetTestDataPasswordString(MockKeychainItemType item, const char* value);
+
+  // Returns the address of the attribute in attribute_list with tag |tag|.
+  static SecKeychainAttribute* AttributeWithTag(
+      const SecKeychainAttributeList& attribute_list,
+      UInt32 tag);
+
+  static const SecKeychainSearchRef kDummySearchRef;
+
+  // Simulates the state when the user refuses to unclock the Keychain.
+  // If true, reading and modifying a password value result in errSecAuthFailed.
+  bool locked_;
+
+  typedef struct KeychainPasswordData {
+    KeychainPasswordData() : data(NULL), length(0) {}
+    void* data;
+    UInt32 length;
+  } KeychainPasswordData;
+
+  // Mutable because the MockAppleKeychain API requires its internal keychain
+  // storage to be modifiable by users of this class.
+  mutable MockKeychainAttributesMap keychain_attr_list_;
+  mutable std::map<MockKeychainItemType,
+                   KeychainPasswordData> keychain_data_;
+  mutable MockKeychainItemType next_item_key_;
+
+  // Tracks the items that should be returned in subsequent calls to
+  // SearchCopyNext, based on the last call to SearchCreateFromAttributes.
+  // We can't handle multiple active searches, since we don't track the search
+  // ref we return, but we don't need to for our mocking.
+  mutable std::vector<MockKeychainItemType> remaining_search_results_;
+
+  // Track copies and releases to make sure they balance. Really these should
+  // be maps to track per item, but this should be good enough to catch
+  // real mistakes.
+  mutable int search_copy_count_;
+  mutable int keychain_item_copy_count_;
+  mutable int attribute_data_copy_count_;
+
+  // Tracks which items (by key) were added with AddInternetPassword.
+  mutable std::set<MockKeychainItemType> added_via_api_;
+#endif  // !defined(OS_IOS)
+
+  // Result code for the |FindGenericPassword()| method.
+  OSStatus find_generic_result_;
+
+  // Records whether |AddGenericPassword()| gets called.
+  mutable bool called_add_generic_;
+
+  // Tracks the allocations and frees of password data in |FindGenericPassword|
+  // and |ItemFreeContent|.
+  mutable int password_data_count_;
+
+  // Records the password being set when |AddGenericPassword()| gets called.
+  mutable std::string add_generic_password_;
+};
+
+}  // namespace crypto
+
+#endif  // CRYPTO_MOCK_KEYCHAIN_MAC_H_