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- implemented check for signature and checksums for warrensbox#160 and …
…warrensbox#290 - added github action for testing - added test for checksum matching - add gitattributes for windows testing. if not present the lf line endings will be converted to crlf which messes with the checksum tests. - update changelog and readme
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| * text=auto | ||
| * text eol=lf |
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| @@ -0,0 +1,30 @@ | ||
| # This workflow will build a golang project | ||
| # For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-go | ||
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| name: Go | ||
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| on: | ||
| push: | ||
| branches: [ '*' ] | ||
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| jobs: | ||
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| integration_tests: | ||
| strategy: | ||
| matrix: | ||
| os: [ubuntu-latest, windows-latest] | ||
| go_version: ['1.22'] | ||
| runs-on: ${{ matrix.os }} | ||
| steps: | ||
| - uses: actions/checkout@v4 | ||
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| - name: Set up Go | ||
| uses: actions/setup-go@v5 | ||
| with: | ||
| go-version: ${{ matrix.go_version }} | ||
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| - name: Build | ||
| run: go build -v ./... | ||
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| - name: Test | ||
| run: go test -v ./... |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| package lib | ||
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| import ( | ||
| "bufio" | ||
| "crypto/sha256" | ||
| "encoding/hex" | ||
| "fmt" | ||
| "golang.org/x/crypto/openpgp" | ||
| "io" | ||
| "log" | ||
| "os" | ||
| "path/filepath" | ||
| "strings" | ||
| ) | ||
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| // getChecksumFromFile Extract the checksum from the signature file | ||
| func getChecksumFromHashFile(signatureFilePath string, terraformFileName string) (string, error) { | ||
| readFile, err := os.Open(signatureFilePath) | ||
| if err != nil { | ||
| fmt.Println("[Error]: Could not open ", signatureFilePath) | ||
| return "", err | ||
| } | ||
| defer readFile.Close() | ||
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| scanner := bufio.NewScanner(readFile) | ||
| scanner.Split(bufio.ScanLines) | ||
| for scanner.Scan() { | ||
| split := strings.Split(scanner.Text(), " ") | ||
| if split[1] == terraformFileName { | ||
| return split[0], nil | ||
| } | ||
| } | ||
| return "", nil | ||
| } | ||
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| // checkChecksumMatches This will calculate and compare the check sum of the downloaded zip file. | ||
| func checkChecksumMatches(hashFile string, targetFile *os.File) bool { | ||
| _, fileName := filepath.Split(targetFile.Name()) | ||
| expectedChecksum, err := getChecksumFromHashFile(hashFile, fileName) | ||
| if err != nil { | ||
| fmt.Println("[Error]: could not get expected checksum from file: " + err.Error()) | ||
| return false | ||
| } | ||
| hash := sha256.New() | ||
| if _, err := io.Copy(hash, targetFile); err != nil { | ||
| fmt.Println("[Error]: Calculating Checksum failed: " + err.Error()) | ||
| return false | ||
| } | ||
| checksum := hex.EncodeToString(hash.Sum(nil)) | ||
| if expectedChecksum != checksum { | ||
| fmt.Println("[Error]: Checksum mismatch. Expected: ", expectedChecksum, " got ", checksum) | ||
| return false | ||
| } | ||
| return true | ||
| } | ||
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| // checkSignatureOfChecksums THis will verify the signature of the file containing the hash sums | ||
| func checkSignatureOfChecksums(keyRingReader *os.File, hashFile *os.File, signatureFile *os.File) bool { | ||
| log.Println("Verifying signature of checksum file...") | ||
| keyring, err := openpgp.ReadArmoredKeyRing(keyRingReader) | ||
| if err != nil { | ||
| log.Fatal("[Error]: Read armored key ring: " + err.Error()) | ||
| return false | ||
| } | ||
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| _, err = openpgp.CheckDetachedSignature(keyring, hashFile, signatureFile) | ||
| if err != nil { | ||
| log.Fatal("[Error]: Checking detached signature: " + err.Error()) | ||
| return false | ||
| } | ||
| log.Println("Verification successful.") | ||
| return true | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| package lib | ||
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| import ( | ||
| "os" | ||
| "testing" | ||
| ) | ||
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| func Test_getChecksumFromHashFile(t *testing.T) { | ||
| expected := "3ff056b5e8259003f67fd0f0ed7229499cfb0b41f3ff55cc184088589994f7a5" | ||
| got, err := getChecksumFromHashFile("../test-data/terraform_1.7.5_SHA256SUMS", "terraform_1.7.5_linux_amd64.zip") | ||
| if err != nil { | ||
| t.Errorf("getChecksumFromHashFile() error = %v", err) | ||
| return | ||
| } | ||
| if got != expected { | ||
| t.Errorf("getChecksumFromHashFile() got = %v, expected %v", got, expected) | ||
| } | ||
| } | ||
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| func Test_checkChecksumMatches(t *testing.T) { | ||
| targetFile, err := os.Open("../test-data/checksum-check-file") | ||
| if err != nil { | ||
| t.Errorf("[Error]: Could not open testfile for signature verification.") | ||
| } | ||
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| if got := checkChecksumMatches("../test-data/terraform_1.7.5_SHA256SUMS", targetFile); got != true { | ||
| t.Errorf("checkChecksumMatches() = %v, want %v", got, true) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,47 +1,142 @@ | ||
| package lib | ||
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| import ( | ||
| "errors" | ||
| "fmt" | ||
| "io" | ||
| "log" | ||
| "net/http" | ||
| "os" | ||
| "path/filepath" | ||
| "strings" | ||
| ) | ||
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| // DownloadFromURL : Downloads the binary from the source url | ||
| func DownloadFromURL(installLocation string, url string) (string, error) { | ||
| const ( | ||
| pubKeyId = "72D7468F" | ||
| pubKeyPrefix = "hashicorp_" | ||
| pubKeySuffix = ".asc" | ||
| pubKeyUri = "https://www.hashicorp.com/.well-known/pgp-key.txt" | ||
| ) | ||
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| // DownloadFromURL : Downloads the terraform binary and its hash from the source url | ||
| func DownloadFromURL(installLocation string, mirrorURL string, tfversion string, versionPrefix string, goos string, goarch string) (string, error) { | ||
| pubKeyFilename := filepath.Join(installLocation, "/", pubKeyPrefix+pubKeyId+pubKeySuffix) | ||
| zipUrl := mirrorURL + tfversion + "/" + versionPrefix + tfversion + "_" + goos + "_" + goarch + ".zip" | ||
| hashUrl := mirrorURL + tfversion + "/" + versionPrefix + tfversion + "_SHA256SUMS" | ||
| hashSignatureUrl := mirrorURL + tfversion + "/" + versionPrefix + tfversion + "_SHA256SUMS." + pubKeyId + ".sig" | ||
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| err := downloadPublicKey(installLocation, pubKeyFilename) | ||
| if err != nil { | ||
| log.Fatal("[Error]: Could not download public key file") | ||
| return "", err | ||
| } | ||
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| log.Println("Downloading ", zipUrl) | ||
| zipFilePath, err := downloadFromURL(installLocation, zipUrl) | ||
| if err != nil { | ||
| log.Fatal("[Error]: Could not download zip file") | ||
| return "", err | ||
| } | ||
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| log.Println("Downloading ", hashUrl) | ||
| hashFilePath, err := downloadFromURL(installLocation, hashUrl) | ||
| if err != nil { | ||
| log.Fatal("[Error]: Could not download hash file") | ||
| return "", err | ||
| } | ||
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| log.Println("Downloading ", hashSignatureUrl) | ||
| hashSigFilePath, err := downloadFromURL(installLocation, hashSignatureUrl) | ||
| if err != nil { | ||
| log.Fatal("[Error]: Could not download hash signature file") | ||
| return "", err | ||
| } | ||
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| publicKeyFile, err := os.Open(pubKeyFilename) | ||
| if err != nil { | ||
| log.Fatal("[Error]: Could not open the public key") | ||
| return "", err | ||
| } | ||
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| signatureFile, err := os.Open(hashSigFilePath) | ||
| if err != nil { | ||
| log.Fatal("[Error]: Could not open the public key") | ||
| return "", err | ||
| } | ||
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| targetFile, err := os.Open(zipFilePath) | ||
| if err != nil { | ||
| log.Fatal("[Error]: Could not open the terraform binary for signature verification.") | ||
| return "", err | ||
| } | ||
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| hashFile, err := os.Open(hashFilePath) | ||
| if err != nil { | ||
| log.Fatal("[Error]: Could not open the terraform binary for signature verification.") | ||
| return "", err | ||
| } | ||
| verified := checkSignatureOfChecksums(publicKeyFile, hashFile, signatureFile) | ||
| if !verified { | ||
| return "", errors.New("signature of checksum files could not be verified") | ||
| } | ||
| match := checkChecksumMatches(hashFilePath, targetFile) | ||
| if !match { | ||
| return "", errors.New("checksums did not match") | ||
| } | ||
| return zipFilePath, err | ||
| } | ||
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| func downloadFromURL(installLocation string, url string) (string, error) { | ||
| tokens := strings.Split(url, "/") | ||
| fileName := tokens[len(tokens)-1] | ||
| fmt.Printf("Downloading to: %s\n", installLocation) | ||
| log.Printf("Downloading to: %s\n", filepath.Join(installLocation, "/", fileName)) | ||
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| response, err := http.Get(url) | ||
| if err != nil { | ||
| fmt.Println("[Error] : Error while downloading", url, "-", err) | ||
| log.Fatal("[Error] : Error while downloading", url, "-", err) | ||
| return "", err | ||
| } | ||
| defer response.Body.Close() | ||
|
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| if response.StatusCode != 200 { | ||
| //Sometimes hashicorp terraform file names are not consistent | ||
| //For example 0.12.0-alpha4 naming convention in the release repo is not consistent | ||
| return "", fmt.Errorf("[Error] : Unable to download from %s", url) | ||
| log.Fatalf("[Error] : Unable to download from %s", url) | ||
| } | ||
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| zipFile := filepath.Join(installLocation, fileName) | ||
| output, err := os.Create(zipFile) | ||
| if err != nil { | ||
| fmt.Println("[Error] : Error while creating", zipFile, "-", err) | ||
| log.Fatal("[Error] : Error while creating", zipFile, "-", err) | ||
| return "", err | ||
| } | ||
| defer output.Close() | ||
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| n, err := io.Copy(output, response.Body) | ||
| if err != nil { | ||
| fmt.Println("[Error] : Error while downloading", url, "-", err) | ||
| log.Fatal("[Error] : Error while writing file", url, "-", err) | ||
| return "", err | ||
| } | ||
|
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| fmt.Println(n, "bytes downloaded") | ||
| log.Println(n, "bytes downloaded") | ||
| return zipFile, nil | ||
| } | ||
|
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| func downloadPublicKey(installLocation string, targetFileName string) error { | ||
| fmt.Println("Looking up public key file at ", targetFileName) | ||
| publicKeyFileExists := FileExists(targetFileName) | ||
| if !publicKeyFileExists { | ||
| // Public key does not exist. Let's grab it from hashicorp | ||
| pubKeyFile, errDl := downloadFromURL(installLocation, pubKeyUri) | ||
| if errDl != nil { | ||
| log.Fatal("[Error]: Error while fetching the public key file from ", pubKeyUri) | ||
| return errDl | ||
| } | ||
| errRename := os.Rename(pubKeyFile, targetFileName) | ||
| if errRename != nil { | ||
| log.Fatal("[Error]: Error while renaming the public key file from ", pubKeyFile, " to ", targetFileName) | ||
| return errRename | ||
| } | ||
| } | ||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| package lib | ||
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| import "os" | ||
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| // fileExists checks if a file exists and is not a directory before we try using it to prevent further errors. | ||
| func FileExists(filename string) bool { | ||
| info, err := os.Stat(filename) | ||
| if os.IsNotExist(err) { | ||
| return false | ||
| } | ||
| return !info.IsDir() | ||
| } |
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