How to use elfBinarySignature method of build Package

Best Syzkaller code snippet using build.elfBinarySignature

linux.go

Source:linux.go

...30	}31	return nil32}33func (linux linux) sign(params *Params) (string, error) {34	return elfBinarySignature(filepath.Join(params.OutputDir, "obj", "vmlinux"))35}36func (linux) buildKernel(params *Params) error {37	configFile := filepath.Join(params.KernelDir, ".config")38	if err := osutil.WriteFile(configFile, params.Config); err != nil {39		return fmt.Errorf("failed to write config file: %v", err)40	}41	if err := osutil.SandboxChown(configFile); err != nil {42		return err43	}44	// One would expect olddefconfig here, but olddefconfig is not present in v3.6 and below.45	// oldconfig is the same as olddefconfig if stdin is not set.46	// Note: passing in compiler is important since 4.17 (at the very least it's noted in the config).47	if err := runMake(params.KernelDir, "oldconfig", "CC="+params.Compiler); err != nil {48		return err49	}50	// Write updated kernel config early, so that it's captured on build failures.51	outputConfig := filepath.Join(params.OutputDir, "kernel.config")52	if err := osutil.CopyFile(configFile, outputConfig); err != nil {53		return err54	}55	// We build only zImage/bzImage as we currently don't use modules.56	var target string57	switch params.TargetArch {58	case "386", "amd64":59		target = "bzImage"60	case "ppc64le":61		target = "zImage"62	}63	if err := runMake(params.KernelDir, target, "CC="+params.Compiler); err != nil {64		return err65	}66	vmlinux := filepath.Join(params.KernelDir, "vmlinux")67	outputVmlinux := filepath.Join(params.OutputDir, "obj", "vmlinux")68	if err := osutil.Rename(vmlinux, outputVmlinux); err != nil {69		return fmt.Errorf("failed to rename vmlinux: %v", err)70	}71	return nil72}73func (linux) createImage(params *Params) error {74	tempDir, err := ioutil.TempDir("", "syz-build")75	if err != nil {76		return err77	}78	defer os.RemoveAll(tempDir)79	scriptFile := filepath.Join(tempDir, "create.sh")80	if err := osutil.WriteExecFile(scriptFile, []byte(createImageScript)); err != nil {81		return fmt.Errorf("failed to write script file: %v", err)82	}83	var kernelImage string84	switch params.TargetArch {85	case "386", "amd64":86		kernelImage = "arch/x86/boot/bzImage"87	case "ppc64le":88		kernelImage = "arch/powerpc/boot/zImage.pseries"89	}90	kernelImagePath := filepath.Join(params.KernelDir, filepath.FromSlash(kernelImage))91	cmd := osutil.Command(scriptFile, params.UserspaceDir, kernelImagePath, params.TargetArch)92	cmd.Dir = tempDir93	cmd.Env = append([]string{}, os.Environ()...)94	cmd.Env = append(cmd.Env,95		"SYZ_VM_TYPE="+params.VMType,96		"SYZ_CMDLINE_FILE="+osutil.Abs(params.CmdlineFile),97		"SYZ_SYSCTL_FILE="+osutil.Abs(params.SysctlFile),98	)99	if _, err = osutil.Run(time.Hour, cmd); err != nil {100		return fmt.Errorf("image build failed: %v", err)101	}102	// Note: we use CopyFile instead of Rename because src and dst can be on different filesystems.103	imageFile := filepath.Join(params.OutputDir, "image")104	if err := osutil.CopyFile(filepath.Join(tempDir, "disk.raw"), imageFile); err != nil {105		return err106	}107	keyFile := filepath.Join(params.OutputDir, "key")108	if err := osutil.CopyFile(filepath.Join(tempDir, "key"), keyFile); err != nil {109		return err110	}111	if err := os.Chmod(keyFile, 0600); err != nil {112		return err113	}114	return nil115}116func (linux) clean(kernelDir, targetArch string) error {117	return runMake(kernelDir, "distclean")118}119func runMake(kernelDir string, args ...string) error {120	args = append(args, fmt.Sprintf("-j%v", runtime.NumCPU()))121	cmd := osutil.Command("make", args...)122	if err := osutil.Sandbox(cmd, true, true); err != nil {123		return err124	}125	cmd.Dir = kernelDir126	cmd.Env = append([]string{}, os.Environ()...)127	// This makes the build [more] deterministic:128	// 2 builds from the same sources should result in the same vmlinux binary.129	// Build on a release commit and on the previous one should result in the same vmlinux too.130	// We use it for detecting no-op changes during bisection.131	cmd.Env = append(cmd.Env,132		"KBUILD_BUILD_VERSION=0",133		"KBUILD_BUILD_TIMESTAMP=now",134		"KBUILD_BUILD_USER=syzkaller",135		"KBUILD_BUILD_HOST=syzkaller",136		"KERNELVERSION=syzkaller",137		"LOCALVERSION=-syzkaller",138	)139	_, err := osutil.Run(time.Hour, cmd)140	return err141}142// elfBinarySignature calculates signature of an elf binary aiming at runtime behavior143// (text/data, debug info is ignored).144func elfBinarySignature(bin string) (string, error) {145	f, err := os.Open(bin)146	if err != nil {147		return "", fmt.Errorf("failed to open binary for signature: %v", err)148	}149	ef, err := elf.NewFile(f)150	if err != nil {151		return "", fmt.Errorf("failed to open elf binary: %v", err)152	}153	hasher := sha256.New()154	for _, sec := range ef.Sections {155		// Hash allocated sections (e.g. no debug info as it's not allocated)156		// with file data (e.g. no bss). We also ignore .notes section as it157		// contains some small changing binary blob that seems irrelevant.158		// It's unclear if it's better to check NOTE type,...

linux_test.go

Source:linux_test.go

...27	}28	if sign1 == sign3 {29		t.Errorf("signature has not changed after a change")30	}31	//func elfBinarySignature(bin string) (string, error) {32}33func sign(t *testing.T, flags []string, changed, comment bool) string {34	buf := new(bytes.Buffer)35	if err := srcTemplate.Execute(buf, SrcParams{Changed: changed, Comment: comment}); err != nil {36		t.Fatal(err)37	}38	src := buf.Bytes()39	bin, err := osutil.TempFile("syz-build-test")40	if err != nil {41		t.Fatal(err)42	}43	defer os.Remove(bin)44	cmd := osutil.Command("gcc", append(flags, "-pthread", "-o", bin, "-x", "c", "-")...)45	cmd.Stdin = buf46	out, err := cmd.CombinedOutput()47	if err != nil {48		t.Fatalf("compiler failed: %v\n%s\n\n%s", err, src, out)49	}50	sign, err := elfBinarySignature(bin)51	if err != nil {52		t.Fatal(err)53	}54	return sign55}56type SrcParams struct {57	Changed bool58	Comment bool59}60var srcTemplate = template.Must(template.New("").Parse(`61#include <stdio.h>62#include <pthread.h>63int main() {64	int x = {{if .Changed}}0{{else}}1{{end}};...

elfBinarySignature

Using AI Code Generation

1import (2func main() {3    cmd := exec.Command("go", "build", "-o", "2.exe", "2.go")4    if err := cmd.Run(); err != nil {5        fmt.Println(err)6        os.Exit(1)7    }8    if err := os.Chmod("2.exe", 0777); err != nil {9        fmt.Println(err)10        os.Exit(1)11    }12    file, err := os.Open("2.exe")13    if err != nil {14        fmt.Println(err)15        os.Exit(1)16    }17    defer file.Close()18    fInfo, err := file.Stat()19    if err != nil {20        fmt.Println(err)21        os.Exit(1)22    }23    buf := make([]byte, fInfo.Size())24    if _, err := file.Read(buf); err != nil {25        fmt.Println(err)26        os.Exit(1)27    }28    if string(buf[:4]) != "MZ" {29        fmt.Println("Not a PE file")30        os.Exit(1)31    }32    fmt.Println("PE file signature found")33    os.Exit(0)34}

elfBinarySignature

Using AI Code Generation

1import (2func main() {3    fmt.Println(b.ElfBinarySignature())4}5ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, not stripped6import (7func main() {8    fmt.Println(b.ElfBinarySignature())9}10ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), statically linked, not stripped11import (12func main() {13    fmt.Println(b.ElfBinarySignature())14}15ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, not stripped16import (17func main() {18    fmt.Println(b.ElfBinarySignature())19}20ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), statically linked, not stripped21import (22func main() {23    fmt.Println(b.ElfBinarySignature())24}25ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), statically linked, not stripped

elfBinarySignature

Using AI Code Generation

1import (2func main() {3	fmt.Println(build.Default.ElfBinarySignature)4}5ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, not stripped6import (7func main() {8	fmt.Println(build.Default.BuildTags)9}10import (11func main() {12	fmt.Println(build.Default.CgoEnabled)13}14import (15func main() {16	fmt.Println(build.Default.Compiler)17}18import (19func main() {20	fmt.Println(build.Default.GOARCH)21}

elfBinarySignature

Using AI Code Generation

1import (2func main() {3    cwd, err := os.Getwd()4    if err != nil {5        fmt.Println(err)6        os.Exit(1)7    }8    path := filepath.Join(cwd, "2.go")9    build := exec.Command("go", "build", path)10    out, err := build.Output()11    if err != nil {12        fmt.Println(err)13        os.Exit(1)14    }15    output := string(out)16    index := strings.Index(output, "hash")

elfBinarySignature

Using AI Code Generation

1import java.io.File;2import java.io.IOException;3import java.util.ArrayList;4import java.util.List;5import org.apache.commons.io.FileUtils;6import org.apache.commons.io.FilenameUtils;7import com.google.common.collect.ImmutableList;8public class elfBinarySignature {9    public static void main(String[] args) throws IOException {10        List<String> files = new ArrayList<String>();11        File directory = new File("/home/rajesh/Downloads/test");12        String[] extensions = new String[] { "elf" };13        files = (List<String>) FileUtils.listFiles(directory, extensions, true);14        for (String file : files) {15            System.out.println("File is " + file);16            String filename = FilenameUtils.getBaseName(file);17            String command = "objdump -x " + file + " | grep -i elf";18            System.out.println("Command is " + command);19            String output = executeCommand(command);20            System.out.println("Output is " + output);21            String[] parts = output.split(":");22            String part2 = parts[1];23            String[] parts2 = part2.split(" ");24            String part3 = parts2[1];25            System.out.println("Part3 is " + part3);26            String[] parts3 = part3.split(" ");27            String part4 = parts3[0];28            System.out.println("Part4 is " + part4);29            String[] parts4 = part4.split(" ");30            String part5 = parts4[0];31            System.out.println("Part5 is " + part5);32            String command2 = "objdump -x " + file + " | grep -i machine";33            System.out.println("Command2 is " + command2);34            String output2 = executeCommand(command2);35            System.out.println("Output2 is " + output2);36            String[] parts5 = output2.split(":");37            String part6 = parts5[1];38            System.out.println("Part6 is " + part6);39            String[] parts6 = part6.split(" ");40            String part7 = parts6[1];41            System.out.println("Part7 is " + part7);42            String[] parts7 = part7.split(" ");43            String part8 = parts7[0];44            System.out.println("Part8 is " + part8);45            String[] parts8 = part8.split(" ");46            String part9 = parts8[0];

elfBinarySignature

Using AI Code Generation

1import (2func main() {3    elfSignature := build.elfBinarySignature()4    for _, arg := range os.Args[1:] {5        file, err := os.Open(arg)6        if err != nil {7            fmt.Fprintf(os.Stderr, "%s: error: %s8", filepath.Base(os.Args[0]), err)9        }10        defer file.Close()11        buf := make([]byte, len(elfSignature))12        _, err = file.Read(buf)13        if err != nil {14            fmt.Fprintf(os.Stderr, "%s: error: %s15", filepath.Base(os.Args[0]), err)16        }17        if strings.HasPrefix(string(buf), elfSignature) {18            fmt.Printf("%s: ELF binary19        } else {20            fmt.Printf("%s: not an ELF binary21        }22    }23}

elfBinarySignature

Using AI Code Generation

1import "fmt"2import "os"3import "os/exec"4import "log"5func main() {6    path, err := os.Executable()7    if err != nil {8        log.Fatal(err)9    }10    cmd := exec.Command(path, "-version")11    out, err := cmd.Output()12    if err != nil {13        log.Fatal(err)14    }15    fmt.Println(string(out))16}17import (18func main() {19    path, err := os.Executable()20    if err != nil {21        log.Fatal(err)22    }23    cmd := exec.Command(path, "-version")24    out, err := cmd.Output()25    if err != nil {26        log.Fatal(err)27    }28    fmt.Println(string(out))29}30import (31func main() {32    path, err := os.Executable()33    if err != nil {34        log.Fatal(err)35    }36    cmd := exec.Command(path, "-version")37    out, err := cmd.Output()38    if err != nil {39        log.Fatal(err)40    }41    fmt.Println(string(out))42}43import (44func main() {45    path, err := os.Executable()

elfBinarySignature

Using AI Code Generation

1import java.io.*;2import java.util.*;3import java.lang.*;4import java.util.Scanner;5import java.util.ArrayList;6import java.util.List;7import java.util.Arrays;8import java.util.stream.Collectors;9import java.util.stream.Stream;10import java.util.stream.IntStream;11import java.util.stream.*;12import java.util.function.*;13import java.util.*;14public class elfBinarySignature {15    public static void main(String[] args) {16        Scanner sc = new Scanner(System.in);17        String s = sc.nextLine();18        String[] s1 = s.split(" ");19        int[] arr = new int[s1.length];20        for (int i = 0; i < s1.length; i++) {21            arr[i] = Integer.parseInt(s1[i]);22        }23        int[] arr1 = new int[s1.length];24        arr1 = arr;25        int[] arr2 = new int[s1.length];26        for (int i = 0; i < s1.length; i++) {27            arr2[i] = arr1[i];28        }29        int[] arr3 = new int[s1.length];30        for (int i = 0; i < s1.length; i++) {31            arr3[i] = arr1[i];32        }33        int[] arr4 = new int[s1.length];34        for (int i = 0; i < s1.length; i++) {35            arr4[i] = arr1[i];36        }37        int[] arr5 = new int[s1.length];38        for (int i = 0; i < s1.length; i++) {39            arr5[i] = arr1[i];40        }41        int[] arr6 = new int[s1.length];42        for (int i = 0; i < s1.length; i++) {43            arr6[i] = arr1[i];44        }45        int[] arr7 = new int[s1.length];46        for (int i = 0; i < s1.length; i++) {47            arr7[i] = arr1[i];48        }49        int[] arr8 = new int[s1.length];50        for (int i = 0; i < s1.length; i++) {51            arr8[i] = arr1[i];52        }53        int[] arr9 = new int[s1.length];54        for (int i = 0; i < s1.length; i++) {

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