1// Copyright (c) 2017, Google Inc. 2// 3// Permission to use, copy, modify, and/or distribute this software for any 4// purpose with or without fee is hereby granted, provided that the above 5// copyright notice and this permission notice appear in all copies. 6// 7// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 8// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 9// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 10// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 11// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 12// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 13// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 14 15//go:build ignore 16 17// check_imported_libraries.go checks that each of its arguments only imports 18// allowed libraries. This is used to avoid accidental dependencies on 19// libstdc++.so. 20package main 21 22import ( 23 "debug/elf" 24 "fmt" 25 "os" 26 "path/filepath" 27) 28 29func checkImportedLibraries(path string) bool { 30 file, err := elf.Open(path) 31 if err != nil { 32 fmt.Fprintf(os.Stderr, "Error opening %s: %s\n", path, err) 33 return false 34 } 35 defer file.Close() 36 37 libs, err := file.ImportedLibraries() 38 if err != nil { 39 fmt.Fprintf(os.Stderr, "Error reading %s: %s\n", path, err) 40 return false 41 } 42 43 allowCpp := filepath.Base(path) == "libssl.so" 44 for _, lib := range libs { 45 if lib == "libc.so.6" || lib == "libcrypto.so" || lib == "libpthread.so.0" || lib == "libgcc_s.so.1" { 46 continue 47 } 48 if allowCpp && lib == "libstdc++.so.6" { 49 continue 50 } 51 fmt.Printf("Invalid dependency for %s: %s\n", path, lib) 52 fmt.Printf("All dependencies:\n") 53 for _, lib := range libs { 54 fmt.Printf(" %s\n", lib) 55 } 56 return false 57 } 58 return true 59} 60 61func main() { 62 ok := true 63 for _, path := range os.Args[1:] { 64 if !checkImportedLibraries(path) { 65 ok = false 66 } 67 } 68 if !ok { 69 os.Exit(1) 70 } 71} 72