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Side by Side Diff: sandbox/win/src/policy_engine_processor.h

Issue 1538283002: Switch to standard integer types in sandbox/. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: macros Created 5 years ago
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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef SANDBOX_SRC_POLICY_ENGINE_PROCESSOR_H__ 5 #ifndef SANDBOX_SRC_POLICY_ENGINE_PROCESSOR_H__
6 #define SANDBOX_SRC_POLICY_ENGINE_PROCESSOR_H__ 6 #define SANDBOX_SRC_POLICY_ENGINE_PROCESSOR_H__
7 7
8 #include "base/basictypes.h" 8 #include <stddef.h>
9 #include <stdint.h>
10
11 #include "base/macros.h"
12 #include "sandbox/win/src/policy_engine_opcodes.h"
9 #include "sandbox/win/src/policy_engine_params.h" 13 #include "sandbox/win/src/policy_engine_params.h"
10 #include "sandbox/win/src/policy_engine_opcodes.h"
11 14
12 namespace sandbox { 15 namespace sandbox {
13 16
14 // This header contains the core policy evaluator. In its simplest form 17 // This header contains the core policy evaluator. In its simplest form
15 // it evaluates a stream of opcodes assuming that they are laid out in 18 // it evaluates a stream of opcodes assuming that they are laid out in
16 // memory as opcode groups. 19 // memory as opcode groups.
17 // 20 //
18 // An opcode group has N comparison opcodes plus 1 action opcode. For 21 // An opcode group has N comparison opcodes plus 1 action opcode. For
19 // example here we have 3 opcode groups (A, B,C): 22 // example here we have 3 opcode groups (A, B,C):
20 // 23 //
(...skipping 38 matching lines...) Expand 10 before | Expand all | Expand 10 after
59 enum PolicyResult { 62 enum PolicyResult {
60 NO_POLICY_MATCH, 63 NO_POLICY_MATCH,
61 POLICY_MATCH, 64 POLICY_MATCH,
62 POLICY_ERROR 65 POLICY_ERROR
63 }; 66 };
64 67
65 // Policy evaluation flags 68 // Policy evaluation flags
66 // TODO(cpu): implement the options kStopOnErrors & kRankedEval. 69 // TODO(cpu): implement the options kStopOnErrors & kRankedEval.
67 // 70 //
68 // Stop evaluating as soon as an error is encountered. 71 // Stop evaluating as soon as an error is encountered.
69 const uint32 kStopOnErrors = 1; 72 const uint32_t kStopOnErrors = 1;
70 // Ignore all non fatal opcode evaluation errors. 73 // Ignore all non fatal opcode evaluation errors.
71 const uint32 kIgnoreErrors = 2; 74 const uint32_t kIgnoreErrors = 2;
72 // Short-circuit evaluation: Only evaluate until opcode group that 75 // Short-circuit evaluation: Only evaluate until opcode group that
73 // evaluated to true has been found. 76 // evaluated to true has been found.
74 const uint32 kShortEval = 4; 77 const uint32_t kShortEval = 4;
75 // Discussed briefly at the policy design meeting. It will evaluate 78 // Discussed briefly at the policy design meeting. It will evaluate
76 // all rules and then return the 'best' rule that evaluated true. 79 // all rules and then return the 'best' rule that evaluated true.
77 const uint32 kRankedEval = 8; 80 const uint32_t kRankedEval = 8;
78 81
79 // This class evaluates a policy-opcode stream given the memory where the 82 // This class evaluates a policy-opcode stream given the memory where the
80 // opcodes are and an input 'parameter set'. 83 // opcodes are and an input 'parameter set'.
81 // 84 //
82 // This class is designed to be callable from interception points 85 // This class is designed to be callable from interception points
83 // as low as the NtXXXX service level (it is not currently safe, but 86 // as low as the NtXXXX service level (it is not currently safe, but
84 // it is designed to be made safe). 87 // it is designed to be made safe).
85 // 88 //
86 // Its usage in an interception is: 89 // Its usage in an interception is:
87 // 90 //
(...skipping 24 matching lines...) Expand all
112 115
113 // This constructor is just a variant of the previous constructor. 116 // This constructor is just a variant of the previous constructor.
114 explicit PolicyProcessor(PolicyBuffer* policy) 117 explicit PolicyProcessor(PolicyBuffer* policy)
115 : policy_(policy) { 118 : policy_(policy) {
116 SetInternalState(0, EVAL_FALSE); 119 SetInternalState(0, EVAL_FALSE);
117 } 120 }
118 121
119 // Evaluates a policy-opcode stream. See the comments at the top of this 122 // Evaluates a policy-opcode stream. See the comments at the top of this
120 // class for more info. Returns POLICY_MATCH if a rule set was found that 123 // class for more info. Returns POLICY_MATCH if a rule set was found that
121 // matches an active policy. 124 // matches an active policy.
122 PolicyResult Evaluate(uint32 options, 125 PolicyResult Evaluate(uint32_t options,
123 ParameterSet* parameters, 126 ParameterSet* parameters,
124 size_t parameter_count); 127 size_t parameter_count);
125 128
126 // If the result of Evaluate() was POLICY_MATCH, calling this function returns 129 // If the result of Evaluate() was POLICY_MATCH, calling this function returns
127 // the recommended policy action. 130 // the recommended policy action.
128 EvalResult GetAction() const; 131 EvalResult GetAction() const;
129 132
130 private: 133 private:
131 struct { 134 struct {
132 size_t current_index_; 135 size_t current_index_;
133 EvalResult current_result_; 136 EvalResult current_result_;
134 } state_; 137 } state_;
135 138
136 // Sets the currently matching action result. 139 // Sets the currently matching action result.
137 void SetInternalState(size_t index, EvalResult result); 140 void SetInternalState(size_t index, EvalResult result);
138 141
139 PolicyBuffer* policy_; 142 PolicyBuffer* policy_;
140 DISALLOW_COPY_AND_ASSIGN(PolicyProcessor); 143 DISALLOW_COPY_AND_ASSIGN(PolicyProcessor);
141 }; 144 };
142 145
143 } // namespace sandbox 146 } // namespace sandbox
144 147
145 #endif // SANDBOX_SRC_POLICY_ENGINE_PROCESSOR_H__ 148 #endif // SANDBOX_SRC_POLICY_ENGINE_PROCESSOR_H__
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