David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 1 | /* Copyright (c) 2016, 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 | package main |
| 16 | |
| 17 | import ( |
| 18 | "flag" |
| 19 | "fmt" |
| 20 | "os" |
| 21 | "os/exec" |
| 22 | "path/filepath" |
| 23 | "strings" |
| 24 | "syscall" |
| 25 | ) |
| 26 | |
| 27 | var ( |
| 28 | boringsslDir = flag.String("boringssl", ".", "The path to the BoringSSL checkout.") |
| 29 | opensslDir = flag.String("openssl", filepath.Join("..", "openssl"), "The path to the OpenSSL checkout.") |
| 30 | ) |
| 31 | |
| 32 | func mapName(path string) string { |
Robert Sloan | 572a4e2 | 2017-04-17 10:52:19 -0700 | [diff] [blame] | 33 | path = strings.Replace(path, filepath.FromSlash("/fipsmodule/"), string(filepath.Separator), 1) |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 34 | switch filepath.ToSlash(path) { |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame^] | 35 | case "crypto/cipher_extra/asm/aes128gcmsiv-x86_64.pl", "crypto/cipher_extra/asm/chacha20_poly1305_x86_64.pl", "crypto/rand/asm/rdrand-x86_64.pl": |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 36 | return "" |
| 37 | case "crypto/ec/asm/p256-x86_64-asm.pl": |
| 38 | return filepath.FromSlash("crypto/ec/asm/ecp_nistz256-x86_64.pl") |
| 39 | } |
| 40 | return path |
| 41 | } |
| 42 | |
| 43 | func diff(from, to string) error { |
| 44 | cmd := exec.Command("diff", "-u", "--", from, to) |
| 45 | cmd.Stdout = os.Stdout |
| 46 | cmd.Stderr = os.Stderr |
| 47 | err := cmd.Run() |
| 48 | // diff returns exit code 1 if the files differ but it was otherwise |
| 49 | // successful. |
| 50 | if exitError, ok := err.(*exec.ExitError); ok && exitError.Sys().(syscall.WaitStatus).ExitStatus() == 1 { |
| 51 | return nil |
| 52 | } |
| 53 | return err |
| 54 | } |
| 55 | |
| 56 | func main() { |
| 57 | flag.Usage = func() { |
| 58 | fmt.Fprintf(os.Stderr, "Usage: diff_asm [flag...] [filter...]\n") |
| 59 | fmt.Fprintf(os.Stderr, "Filter arguments limit to assembly files which match arguments.\n") |
| 60 | fmt.Fprintf(os.Stderr, "If not using a filter, piping to `diffstat` may be useful.\n\n") |
| 61 | flag.PrintDefaults() |
| 62 | } |
| 63 | flag.Parse() |
| 64 | |
| 65 | // Find all the assembly files. |
| 66 | var files []string |
| 67 | err := filepath.Walk(*boringsslDir, func(path string, info os.FileInfo, err error) error { |
| 68 | if err != nil { |
| 69 | return nil |
| 70 | } |
| 71 | |
| 72 | path, err = filepath.Rel(*boringsslDir, path) |
| 73 | if err != nil { |
| 74 | return err |
| 75 | } |
| 76 | |
| 77 | dir := filepath.Base(filepath.Dir(path)) |
| 78 | if !info.IsDir() && (dir == "asm" || dir == "perlasm") && strings.HasSuffix(filepath.Base(path), ".pl") { |
| 79 | files = append(files, path) |
| 80 | } |
| 81 | |
| 82 | return nil |
| 83 | }) |
| 84 | if err != nil { |
| 85 | fmt.Fprintf(os.Stderr, "Error finding assembly: %s\n", err) |
| 86 | os.Exit(1) |
| 87 | } |
| 88 | |
| 89 | for _, file := range files { |
| 90 | opensslFile := mapName(file) |
| 91 | if len(opensslFile) == 0 { |
| 92 | continue |
| 93 | } |
| 94 | |
| 95 | if flag.NArg() > 0 { |
| 96 | var found bool |
| 97 | for _, arg := range flag.Args() { |
| 98 | if strings.Contains(file, arg) { |
| 99 | found = true |
| 100 | break |
| 101 | } |
| 102 | } |
| 103 | if !found { |
| 104 | continue |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | if err := diff(filepath.Join(*opensslDir, opensslFile), filepath.Join(*boringsslDir, file)); err != nil { |
| 109 | fmt.Fprintf(os.Stderr, "Error comparing %s: %s\n", file, err) |
| 110 | os.Exit(1) |
| 111 | } |
| 112 | } |
| 113 | } |