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main.go
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main.go
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package main
import (
"bufio"
"context"
"flag"
"fmt"
"os"
"strings"
"time"
"golang.org/x/crypto/ssh/terminal"
"github.com/chromedp/chromedp"
"github.com/fatih/color"
"github.com/sethvargo/go-password/password"
)
func main() {
flag.Usage = usage
var (
// Things for command line arguments.
username = flag.String(
"username", "", "Username to login with.",
)
oldPassword = flag.String(
"old-password", "", "Current password.",
)
updatePassword = flag.String(
"new-password", "", "Updated password.",
)
autoGeneratePassword = flag.Bool(
"auto-generate", false, "Generate a new password.")
autoGenerateLen = flag.Int(
"max-len",
16,
"auto-generate: The maximum length of the password.",
)
autoGenerateDigits = flag.Int(
"num-digits",
4,
"auto-generate: The number of digits the password should contain.",
)
autoGenerateChars = flag.Int(
"num-symbols",
4,
"auto-generate: The number of symbols the password should contain.",
)
autoGenerateUpper = flag.Bool(
"no-upper",
false,
"auto-generate: Disable upper-case letter in the password.",
)
autoGenerateAllowRepeat = flag.Bool(
"allow-repeat",
false,
"auto-generate: Allow repetitions in the password.",
)
tmpDir = flag.String(
"tmp-dir",
"nflx-passwd-rotate-tmpdir",
"Temporary directory for user-data.",
)
devLogout = flag.Bool(
"dev-logout",
false,
"Force logout from all devices.",
)
noColor = flag.Bool("no-color", false, "Disable color output.")
outFile = flag.String(
"out-file", "", "Write the new password to this file.",
)
execPath = flag.String(
"exec-path", "", "Path to the `google-chrome' binary.",
)
timeout = flag.Uint(
"wait",
(10 * netflixVerifyWait),
"Time to wait for the operation to complete.",
)
test = flag.Bool("test", false, "For testing only.")
// Things for interactive inputs.
usrInt bool
oldPwInt bool
newPwInt bool
overrideInt bool
rdr *bufio.Reader
wtr *bufio.Writer
// Things for the browser.
err error
eval bool
evalStr string
tasks chromedp.Tasks
execCtx context.Context
bwsrCtx context.Context
waitCtx context.Context
execCancel context.CancelFunc
bwsrCancel context.CancelFunc
waitCancel context.CancelFunc
login = &netflixLogin{}
update = &netflixPasswordUpdate{}
// Misc.
tmp []byte
pword *password.Generator
errno *int
status int
pwFile *os.File
)
errno = &status
defer exit(errno)
flag.Parse()
rdr = bufio.NewReader(os.Stdin)
if *noColor {
color.NoColor = true
}
if *username == "" {
usrInt = true
}
if *oldPassword == "" {
oldPwInt = true
}
if *updatePassword == "" {
newPwInt = true
}
if !newPwInt && *autoGeneratePassword {
wrnColor(
os.Stderr,
"WRN: Conflicting options -- `new-password' (non-empty)"+
" and `auto-generate'; choosing the latter.\n",
)
overrideInt = true
}
if overrideInt || *autoGeneratePassword {
pword, err = password.NewGenerator(&password.GeneratorInput{
Symbols: autoGenerateSymsAll,
})
// For testing only.
if *test {
pword, err = password.NewGenerator(&password.GeneratorInput{
Symbols: autoGenerateSymsTest,
})
}
if err != nil {
errColor(
os.Stderr,
"ERR: Unable to initialize the password generator (%s).\n",
err,
)
}
*updatePassword, err = pword.Generate(
*autoGenerateLen,
*autoGenerateChars,
*autoGenerateDigits,
*autoGenerateUpper,
*autoGenerateAllowRepeat,
)
if err != nil {
// Fallback to interactive input.
overrideInt = false
errColor(
os.Stderr,
"ERR: Unable to auto-generate a new password (%s).\n",
err,
)
*errno = errAutoFail
return
} else {
if *outFile == "" {
infColor(
os.Stderr,
"INF: Generated Password: \"%s\" "+
"(does not include the encolsing quotes).\n",
*updatePassword,
)
}
}
overrideInt = true
}
if usrInt {
inpColor(os.Stdout, "Netflix Username: ")
*username, err = rdr.ReadString('\n')
if err != nil {
errColor(
os.Stderr,
"ERR: Unable to read the input string (%s).\n",
err,
)
*errno = errFlagFail
return
}
*username = strings.TrimSpace(*username)
}
if oldPwInt {
inpColor(os.Stdout, "Netflix Password (for %s, current): ", *username)
tmp, err = terminal.ReadPassword(int(os.Stdin.Fd()))
if err != nil {
errColor(
os.Stderr,
"ERR: Unable to read the input string (%s).\n",
err,
)
*errno = errFlagFail
return
}
*oldPassword = string(tmp)
fmt.Println()
}
if !overrideInt && newPwInt {
inpColor(os.Stdout, "Netflix Password (for %s, updated): ", *username)
tmp, err = terminal.ReadPassword(int(os.Stdin.Fd()))
if err != nil {
errColor(
os.Stderr,
"ERR: Unable to read the input string (%s).\n",
err,
)
*errno = errFlagFail
return
}
*updatePassword = string(tmp)
fmt.Println()
inpColor(os.Stdout, "Netflix Password (for %s, confirm): ", *username)
tmp, err = terminal.ReadPassword(int(os.Stdin.Fd()))
if err != nil {
errColor(
os.Stderr,
"ERR: Unable to read the input string (%s).\n",
err,
)
*errno = errFlagFail
return
}
fmt.Println()
if string(tmp) != *updatePassword {
errColor(os.Stderr, "ERR: Passwords do not match.\n")
*errno = errFlagFail
return
}
}
// Create a temporary directory for user data.
*tmpDir, err = mkTmpDir(*tmpDir)
if err != nil {
errColor(
os.Stderr,
"ERR: Unable to create a temporary directory (%s).\n",
err,
)
*errno = errTmpFail
return
}
defer os.RemoveAll(*tmpDir)
// Create an execution alloator.
execCtx, execCancel = genExecContext(*tmpDir, *execPath)
defer execCancel()
// Add a wait context for timeouts.
waitCtx, waitCancel = context.WithTimeout(
execCtx, (time.Duration(*timeout) * time.Second),
)
defer waitCancel()
// This is the main context for the browser.
bwsrCtx, bwsrCancel = chromedp.NewContext(waitCtx)
defer bwsrCancel()
// Get the login credentials.
login.loadLoginParams(*username, *oldPassword)
// Get the list of actions for login.
tasks = loginActions(login)
// Login to Netflix.
err = exec(bwsrCtx, tasks)
if err != nil {
errColor(os.Stderr, "ERR: Browser execution failed (%s).\n", err)
*errno = errExecFail
return
}
// Check if the login works.
evalStr, eval = getFailureReason(bwsrCtx, "login")
if eval {
errColor(os.Stderr, "ERR: %s\n", evalStr)
*errno = errVerifyFail
return
} else {
eval, err = jsEval(
bwsrCtx, fmt.Sprintf(netflixEval, login.evalXpath, " === null"),
)
if err != nil {
errColor(
os.Stderr,
"ERR: Netflix login verification failed (%s).\n",
err,
)
*errno = errVerifyFail
return
}
if !eval {
errColor(os.Stderr, "ERR: Netflix login failed.\n")
*errno = errLoginFail
return
}
}
// Get the update credentials.
update.loadUpdateParams(*oldPassword, *updatePassword, *devLogout)
// Get the list of actions for update.
tasks = updateActions(update)
// Update the password.
err = exec(bwsrCtx, tasks)
if err != nil {
errColor(os.Stderr, "ERR: Browser execution failed (%s).\n", err)
*errno = errExecFail
return
}
// Check if the update worked.
evalStr, eval = getFailureReason(bwsrCtx, "update")
if eval {
errColor(os.Stderr, "ERR: %s\n", evalStr)
*errno = errVerifyFail
return
} else {
eval, err = jsEval(
bwsrCtx, fmt.Sprintf(netflixEval, update.evalXpath, " !== null"),
)
if err != nil {
errColor(
os.Stderr,
"ERR: Netflix password update verification failed (%s).\n",
err,
)
*errno = errVerifyFail
return
}
if !eval {
errColor(os.Stderr, "ERR: Password update failed.\n")
*errno = errUpdateFail
return
}
}
// Write the new password to a file.
if *outFile != "" {
infColor(
os.Stdout, "INF: Writing the new password to: \"%s\".\n", *outFile,
)
pwFile, err = os.Create(*outFile)
if err != nil {
errColor(
os.Stderr,
"ERR: Unable to open file for writing (%s).\n",
err,
)
*errno = errWriteFail
return
}
defer pwFile.Close()
wtr = bufio.NewWriter(pwFile)
_, err = wtr.WriteString(*updatePassword + "\n")
if err != nil {
errColor(
os.Stderr,
"ERR: Unable to write password to file (%s)\n",
err,
)
*errno = errWriteFail
return
}
wtr.Flush()
}
okColor(
os.Stdout,
"INF: The password for Netflix was updated successfully!\n",
)
}