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72 lines
2.3 KiB
72 lines
2.3 KiB
/*
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* Copyright (C) 2023 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SHELL_AS_CONTEXT_H_
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#define SHELL_AS_CONTEXT_H_
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#include <selinux/selinux.h>
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#include <sys/capability.h>
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#include <memory>
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#include <optional>
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#include <vector>
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namespace shell_as {
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// Enumeration of the possible seccomp filters that Android may apply to a
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// process.
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//
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// This should be kept in sync with the policies defined in:
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// bionic/libc/seccomp/include/seccomp_policy.h
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enum SeccompFilter {
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kAppFilter = 0,
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kAppZygoteFilter = 1,
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kSystemFilter = 2,
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};
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typedef struct SecurityContext {
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std::optional<uid_t> user_id;
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std::optional<gid_t> group_id;
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std::optional<std::vector<gid_t>> supplementary_group_ids;
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std::optional<char *> selinux_context;
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std::optional<SeccompFilter> seccomp_filter;
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std::optional<cap_t> capabilities;
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} SecurityContext;
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// Infers the appropriate seccomp filter from a user ID.
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//
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// This mimics the behavior of the zygote process and provides a sane default
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// method of picking a filter. However, it is not 100% accurate since it does
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// not assign the app zygote filter and would not return an appropriate value
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// for processes not started by the zygote.
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SeccompFilter SeccompFilterFromUserId(uid_t user_id);
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// Derives a complete security context from a given process.
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//
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// If unable to determine any field of the context this method will return false
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// and not modify the given context.
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bool SecurityContextFromProcess(pid_t process_id, SecurityContext* context);
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// Derives a complete security context from the bundled test app.
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//
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// If unable to determine any field of the context this method will return false
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// and not modify the given context.
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bool SecurityContextFromTestApp(SecurityContext* context);
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} // namespace shell_as
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#endif // SHELL_AS_CONTEXT_H_
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