114 lines
3.2 KiB
Go
114 lines
3.2 KiB
Go
/* Copyright (c) 2016, Google Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
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package main
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import (
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"flag"
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"fmt"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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"syscall"
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)
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var (
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boringsslDir = flag.String("boringssl", ".", "The path to the BoringSSL checkout.")
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opensslDir = flag.String("openssl", filepath.Join("..", "openssl"), "The path to the OpenSSL checkout.")
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)
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func mapName(path string) string {
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path = strings.Replace(path, filepath.FromSlash("/fipsmodule/"), string(filepath.Separator), 1)
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switch filepath.ToSlash(path) {
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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":
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return ""
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case "crypto/ec/asm/p256-x86_64-asm.pl":
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return filepath.FromSlash("crypto/ec/asm/ecp_nistz256-x86_64.pl")
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}
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return path
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}
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func diff(from, to string) error {
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cmd := exec.Command("diff", "-u", "--", from, to)
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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err := cmd.Run()
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// diff returns exit code 1 if the files differ but it was otherwise
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// successful.
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if exitError, ok := err.(*exec.ExitError); ok && exitError.Sys().(syscall.WaitStatus).ExitStatus() == 1 {
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return nil
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}
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return err
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}
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func main() {
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flag.Usage = func() {
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fmt.Fprintf(os.Stderr, "Usage: diff_asm [flag...] [filter...]\n")
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fmt.Fprintf(os.Stderr, "Filter arguments limit to assembly files which match arguments.\n")
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fmt.Fprintf(os.Stderr, "If not using a filter, piping to `diffstat` may be useful.\n\n")
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flag.PrintDefaults()
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}
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flag.Parse()
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// Find all the assembly files.
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var files []string
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err := filepath.Walk(*boringsslDir, func(path string, info os.FileInfo, err error) error {
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if err != nil {
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return nil
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}
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path, err = filepath.Rel(*boringsslDir, path)
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if err != nil {
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return err
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}
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dir := filepath.Base(filepath.Dir(path))
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if !info.IsDir() && (dir == "asm" || dir == "perlasm") && strings.HasSuffix(filepath.Base(path), ".pl") {
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files = append(files, path)
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}
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return nil
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})
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if err != nil {
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fmt.Fprintf(os.Stderr, "Error finding assembly: %s\n", err)
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os.Exit(1)
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}
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for _, file := range files {
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opensslFile := mapName(file)
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if len(opensslFile) == 0 {
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continue
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}
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if flag.NArg() > 0 {
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var found bool
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for _, arg := range flag.Args() {
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if strings.Contains(file, arg) {
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found = true
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break
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}
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}
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if !found {
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continue
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}
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}
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if err := diff(filepath.Join(*opensslDir, opensslFile), filepath.Join(*boringsslDir, file)); err != nil {
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fmt.Fprintf(os.Stderr, "Error comparing %s: %s\n", file, err)
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os.Exit(1)
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}
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}
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}
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