From 4479575894027123f82484ae9571e972406132ff Mon Sep 17 00:00:00 2001 From: Rustam Gilyazov <16064414+rusq@users.noreply.github.com> Date: Wed, 4 May 2022 23:24:10 +1000 Subject: [PATCH] - --- .github/workflows/go.yml | 25 + .github/workflows/release.yml | 42 ++ .gitignore | 15 + LICENCE | 674 ++++++++++++++++++++++++++ Makefile | 32 ++ README.md | 29 ++ go.mod | 52 ++ go.sum | 202 ++++++++ internal/mtp/authflow/auth_term.go | 197 ++++++++ internal/mtp/authflow/util_unix.go | 9 + internal/mtp/authflow/util_windows.go | 9 + internal/mtp/bg/bg.go | 82 ++++ internal/mtp/creds_storage.go | 72 +++ internal/mtp/creds_storage_test.go | 59 +++ internal/mtp/dialogs.go | 110 +++++ internal/mtp/dialogs_filters.go | 25 + internal/mtp/messages.go | 134 +++++ internal/mtp/messages_test.go | 87 ++++ internal/mtp/mtp.go | 220 +++++++++ internal/mtp/peer_storage.go | 129 +++++ internal/secure/int.go | 44 ++ internal/secure/int_test.go | 45 ++ internal/secure/secure.go | 343 +++++++++++++ internal/secure/secure_test.go | 390 +++++++++++++++ internal/secure/string.go | 39 ++ internal/secure/string_test.go | 108 +++++ internal/sys/sys.go | 35 ++ internal/sys/sys_test.go | 36 ++ internal/tui/app.go | 137 ++++++ internal/tui/chatlist.go | 136 ++++++ internal/tui/confirm.go | 66 +++ internal/tui/find.go | 51 ++ internal/tui/fsm.go | 145 ++++++ internal/tui/nothing.go | 11 + main.go | 246 ++++++++++ 35 files changed, 4036 insertions(+) create mode 100644 .github/workflows/go.yml create mode 100644 .github/workflows/release.yml create mode 100644 .gitignore create mode 100644 LICENCE create mode 100644 Makefile create mode 100644 README.md create mode 100644 go.mod create mode 100644 go.sum create mode 100644 internal/mtp/authflow/auth_term.go create mode 100644 internal/mtp/authflow/util_unix.go create mode 100644 internal/mtp/authflow/util_windows.go create mode 100644 internal/mtp/bg/bg.go create mode 100644 internal/mtp/creds_storage.go create mode 100644 internal/mtp/creds_storage_test.go create mode 100644 internal/mtp/dialogs.go create mode 100644 internal/mtp/dialogs_filters.go create mode 100644 internal/mtp/messages.go create mode 100644 internal/mtp/messages_test.go create mode 100644 internal/mtp/mtp.go create mode 100644 internal/mtp/peer_storage.go create mode 100644 internal/secure/int.go create mode 100644 internal/secure/int_test.go create mode 100644 internal/secure/secure.go create mode 100644 internal/secure/secure_test.go create mode 100644 internal/secure/string.go create mode 100644 internal/secure/string_test.go create mode 100644 internal/sys/sys.go create mode 100644 internal/sys/sys_test.go create mode 100644 internal/tui/app.go create mode 100644 internal/tui/chatlist.go create mode 100644 internal/tui/confirm.go create mode 100644 internal/tui/find.go create mode 100644 internal/tui/fsm.go create mode 100644 internal/tui/nothing.go create mode 100644 main.go diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml new file mode 100644 index 0000000..53daa00 --- /dev/null +++ b/.github/workflows/go.yml @@ -0,0 +1,25 @@ +name: Go + +on: + push: + branches: [ master ] + pull_request: + branches: [ master ] + +jobs: + + build: + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v3 + + - name: Set up Go + uses: actions/setup-go@v3 + with: + go-version: 1.18 + + - name: Build + run: go build -v ./... + + - name: Test + run: go test -v ./... diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml new file mode 100644 index 0000000..2004fec --- /dev/null +++ b/.github/workflows/release.yml @@ -0,0 +1,42 @@ +name: Release Go Binaries + +on: + release: + types: [created] + workflow_dispatch: + +env: + CMD_PATH: ./ + + +jobs: + releases-matrix: + name: Release Matrix + runs-on: ubuntu-latest + strategy: + matrix: + goos: [linux, windows, darwin] + goarch: ["386", amd64] + exclude: + - goarch: "386" + goos: darwin + steps: + - uses: actions/checkout@v2 + + - name: Set APP_VERSION env + run: echo APP_VERSION=$(echo ${GITHUB_REF} | rev | cut -d'/' -f 1 | rev ) >> ${GITHUB_ENV} + - name: Set BUILD_TIME env + run: echo BUILD_TIME=$(date) >> ${GITHUB_ENV} + - name: Environment Printer + uses: managedkaos/print-env@v1.0 + + - uses: wangyoucao577/go-release-action@v1.28 + with: + github_token: ${{ secrets.ACTIONS_TOKEN }} + goos: ${{ matrix.goos }} + goarch: ${{ matrix.goarch }} + goversion: "1.18" + project_path: "${{ env.CMD_PATH }}" + build_flags: -v + ldflags: -X "main.version=${{ env.APP_VERSION }}" -X "main.builtOn=${{ env.BUILD_TIME }}" -X main.gitCommit=${{ github.sha }} -X main.gitRef=${{ github.ref }} + extra_files: LICENCE README.md diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..66fd13c --- /dev/null +++ b/.gitignore @@ -0,0 +1,15 @@ +# Binaries for programs and plugins +*.exe +*.exe~ +*.dll +*.so +*.dylib + +# Test binary, built with `go test -c` +*.test + +# Output of the go coverage tool, specifically when used with LiteIDE +*.out + +# Dependency directories (remove the comment below to include it) +# vendor/ diff --git a/LICENCE b/LICENCE new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/LICENCE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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No Surrender of Others' Freedom. + + If conditions are imposed on you (whether by court order, agreement or +otherwise) that contradict the conditions of this License, they do not +excuse you from the conditions of this License. If you cannot convey a +covered work so as to satisfy simultaneously your obligations under this +License and any other pertinent obligations, then as a consequence you may +not convey it at all. For example, if you agree to terms that obligate you +to collect a royalty for further conveying from those to whom you convey +the Program, the only way you could satisfy both those terms and this +License would be to refrain entirely from conveying the Program. + + 13. Use with the GNU Affero General Public License. + + Notwithstanding any other provision of this License, you have +permission to link or combine any covered work with a work licensed +under version 3 of the GNU Affero General Public License into a single +combined work, and to convey the resulting work. The terms of this +License will continue to apply to the part which is the covered work, +but the special requirements of the GNU Affero General Public License, +section 13, concerning interaction through a network will apply to the +combination as such. + + 14. Revised Versions of this License. + + The Free Software Foundation may publish revised and/or new versions of +the GNU General Public License from time to time. Such new versions will +be similar in spirit to the present version, but may differ in detail to +address new problems or concerns. + + Each version is given a distinguishing version number. If the +Program specifies that a certain numbered version of the GNU General +Public License "or any later version" applies to it, you have the +option of following the terms and conditions either of that numbered +version or of any later version published by the Free Software +Foundation. If the Program does not specify a version number of the +GNU General Public License, you may choose any version ever published +by the Free Software Foundation. + + If the Program specifies that a proxy can decide which future +versions of the GNU General Public License can be used, that proxy's +public statement of acceptance of a version permanently authorizes you +to choose that version for the Program. + + Later license versions may give you additional or different +permissions. However, no additional obligations are imposed on any +author or copyright holder as a result of your choosing to follow a +later version. + + 15. Disclaimer of Warranty. + + THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY +APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT +HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY +OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, +THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR +PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM +IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF +ALL NECESSARY SERVICING, REPAIR OR CORRECTION. + + 16. Limitation of Liability. + + IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS +THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY +GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE +USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF +DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD +PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), +EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF +SUCH DAMAGES. + + 17. Interpretation of Sections 15 and 16. + + If the disclaimer of warranty and limitation of liability provided +above cannot be given local legal effect according to their terms, +reviewing courts shall apply local law that most closely approximates +an absolute waiver of all civil liability in connection with the +Program, unless a warranty or assumption of liability accompanies a +copy of the Program in return for a fee. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..28c14a5 --- /dev/null +++ b/Makefile @@ -0,0 +1,32 @@ +SHELL=/bin/sh + +OUTPUT=tgmsgdel + +.PHONY: clean cleanall cleanfiles debug run + + +export CGO_LDFLAGS="-L/usr/local/opt/openssl/lib" + +$(OUTPUT): main.go + go build -o $@ + +debug: + dlv debug . + +run: + go run . + +clean: + -rm $(OUTPUT) + +test: + go test ./... -race -cover + +fuzz: + go test -fuzz=Fuzz -fuzztime 30s ./internal/secure + go test -fuzz=Fuzz -fuzztime 30s ./internal/mtp + +cleanfiles: + -rm -rf tdlib-db tdlib-files + +cleanall: clean cleanfiles diff --git a/README.md b/README.md new file mode 100644 index 0000000..00efaf1 --- /dev/null +++ b/README.md @@ -0,0 +1,29 @@ +# Wipe My Chat +Delete all your messages in public and private chats. + +--- +> _In loving memory of V. Gorban, 1967-2022._ +--- + +## Usage + +1. Download the release from the [Releases page][1]; +2. Unpack; +3. Run. + +You will need: +- Telegram API ID +- Telegram API HASH + +Don't worry, the program provides easy to follow instructions on how to get +those. + +To authenticate, you will use your Telegram Account phone number and the code, +that will be sent to you in-app or text message (SMS). + + +## Licence +GNU Public Licence 3.0, see [LICENCE][2] + +[1]: https://github.com/rusq/wipemychat/releases +[2]: LICENCE diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..3cc68ba --- /dev/null +++ b/go.mod @@ -0,0 +1,52 @@ +module github.com/rusq/wipemychat + +go 1.18 + +require ( + github.com/bluele/gcache v0.0.2 + github.com/fatih/color v1.13.0 + github.com/gdamore/tcell/v2 v2.4.1-0.20210905002822-f057f0a857a1 + github.com/gotd/contrib v0.12.0 + github.com/gotd/td v0.57.0 + github.com/joho/godotenv v1.4.0 + github.com/looplab/fsm v0.3.0 + github.com/mattn/go-colorable v0.1.12 + github.com/rivo/tview v0.0.0-20220307222120-9994674d60a8 + github.com/rusq/dlog v1.3.3 + github.com/rusq/osenv/v2 v2.0.1 + github.com/rusq/tracer v1.0.0 + github.com/schollz/progressbar/v3 v3.8.6 + github.com/stretchr/testify v1.7.1 + go.uber.org/zap v1.21.0 + golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 +) + +require ( + github.com/cenkalti/backoff/v4 v4.1.3 // indirect + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/gdamore/encoding v1.0.0 // indirect + github.com/go-faster/errors v0.5.0 // indirect + github.com/go-faster/jx v0.33.0 // indirect + github.com/go-faster/xor v0.3.0 // indirect + github.com/gotd/ige v0.2.2 // indirect + github.com/gotd/neo v0.1.5 // indirect + github.com/klauspost/compress v1.15.1 // indirect + github.com/lucasb-eyer/go-colorful v1.2.0 // indirect + github.com/mattn/go-isatty v0.0.14 // indirect + github.com/mattn/go-runewidth v0.0.13 // indirect + github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db // indirect + github.com/pmezard/go-difflib v1.0.0 // indirect + github.com/rivo/uniseg v0.2.0 // indirect + github.com/segmentio/asm v1.1.3 // indirect + go.uber.org/atomic v1.9.0 // indirect + go.uber.org/multierr v1.8.0 // indirect + golang.org/x/crypto v0.0.0-20220131195533-30dcbda58838 // indirect + golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2 // indirect + golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect + golang.org/x/sys v0.0.0-20220310020820-b874c991c1a5 // indirect + golang.org/x/text v0.3.7 // indirect + golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect + gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect + nhooyr.io/websocket v1.8.7 // indirect + rsc.io/qr v0.2.0 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..8068d82 --- /dev/null +++ b/go.sum @@ -0,0 +1,202 @@ +github.com/DataDog/zstd v1.4.5 h1:EndNeuB0l9syBZhut0wns3gV1hL8zX8LIu6ZiVHWLIQ= +github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8= +github.com/benbjohnson/clock v1.1.0/go.mod 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diff --git a/internal/mtp/authflow/auth_term.go b/internal/mtp/authflow/auth_term.go new file mode 100644 index 0000000..e876d17 --- /dev/null +++ b/internal/mtp/authflow/auth_term.go @@ -0,0 +1,197 @@ +package authflow + +import ( + "bufio" + "context" + "errors" + "fmt" + "io" + "os" + "strconv" + "strings" + "time" + + "github.com/fatih/color" + "github.com/gotd/td/telegram/auth" + "github.com/gotd/td/tg" + "golang.org/x/term" +) + +type FullAuthFlow interface { + auth.UserAuthenticator + + GetAPICredentials(ctx context.Context) (int, string, error) +} + +var ( + blink = color.New(color.BlinkSlow) + italic = color.New(color.Italic) + param = color.New(color.Italic, color.FgBlue, color.BgHiWhite) + warn = color.New(color.FgHiRed) + underline = color.New(color.Underline) + + line = strings.Repeat("-=", 40) +) + +// noSignUp can be embedded to prevent signing up. +type noSignUp struct{} + +func (c noSignUp) SignUp(ctx context.Context) (auth.UserInfo, error) { + return auth.UserInfo{}, errors.New("not implemented") +} + +func (c noSignUp) AcceptTermsOfService(ctx context.Context, tos tg.HelpTermsOfService) error { + return &auth.SignUpRequired{TermsOfService: tos} +} + +// TermAuth implements authentication via terminal. +type TermAuth struct { + noSignUp + + phone string +} + +func NewTermAuth(phone string) TermAuth { + return TermAuth{phone: phone} +} + +func (a TermAuth) Phone(_ context.Context) (string, error) { + clrscr(os.Stdout) + if a.phone != "" { + return a.phone, nil + } + fmt.Printf("Connected, please login to Telegram.\n\n") + fmt.Print("Enter phone: ") + return readln(os.Stdin) +} + +func (a TermAuth) Password(ctx context.Context) (string, error) { + defer fmt.Println() + fmt.Print("Enter 2FA password (won't be shown): ") + return readpass(ctx) +} + +func getCodeSpecifics(code *tg.AuthSentCode) (string, int) { + digits := func(where string, n int) string { + return fmt.Sprintf("The code %s.\nEnter exactly %d digits.", where, n) + } + + switch val := code.Type.(type) { + case *tg.AuthSentCodeTypeApp: + return digits("was sent through the telegram app", val.GetLength()), val.GetLength() + case *tg.AuthSentCodeTypeSMS: + return digits("will be sent via a text message (SMS)", val.GetLength()), val.GetLength() + case *tg.AuthSentCodeTypeCall: + return digits("will be sent via a phone call, and a synthesized voice will tell you what to input", val.GetLength()), val.GetLength() + case *tg.AuthSentCodeTypeFlashCall: + return fmt.Sprintf("The code will be sent via a flash phone call, that will be closed immediately.\nThe phone code will then be the phone number itself, just make sure that the\nphone number matches the specified pattern: %q (%d characters)", val.GetPattern(), len(val.GetPattern())), len(val.GetPattern()) + case *tg.AuthSentCodeTypeMissedCall: + + return fmt.Sprintf("The code will be sent via a flash phone call, that will be closed immediately.\nThe last digits of the phone number that calls are the code that must be entered.\nThe phone call prefix will be: %s and the length of the code is %d", val.GetPrefix(), val.GetLength()), val.GetLength() + default: + return "UNSUPPORTED AUTH TYPE", 0 + } +} + +func getCodeTimeout(code *tg.AuthSentCode) (string, time.Duration) { + timeout, ok := code.GetTimeout() + if !ok { + return "", 30 * time.Minute + } + ret := time.Duration(timeout) * time.Second + return fmt.Sprintf("(enter code within %s)", ret), ret +} + +func (a TermAuth) Code(_ context.Context, code *tg.AuthSentCode) (string, error) { + codeHelp, length := getCodeSpecifics(code) + timeoutHelp, timeoutIn := getCodeTimeout(code) + timeout := time.Now().Add(timeoutIn) + + var input string + var err error + for { + if time.Now().After(timeout) { + return "", errors.New("operation timed out") + } + fmt.Printf("(i) TIP: %s\nEnter code%s: ", codeHelp, timeoutHelp) + input, err = readln(os.Stdin) + if err != nil { + if errors.Is(err, io.EOF) { + return "", errors.New("login aborted") + } + } + if len(input) == length || length == 0 { + break + } + fmt.Println("*** Invalid code, try again [Press Ctrl+C to abort] ***") + } + return input, nil +} + +func (a TermAuth) GetAPICredentials(ctx context.Context) (int, string, error) { + instructions() + var id int + for { + fmt.Printf("Enter App '%s': ", param.Sprint(" api_id ")) + sID, err := readln(os.Stdin) + if err != nil { + return 0, "", err + } + id, err = strconv.Atoi(sID) + if err == nil { + break + } + fmt.Println("*** Input error: api_id should be an integer") + } + fmt.Printf("Enter App '%s' (won't be shown): ", param.Sprint(" api_hash ")) + hash, err := readpass(ctx) + fmt.Println() + if err != nil { + return 0, "", err + } + return id, hash, nil +} + +func instructions() { + + fmt.Println(line) + fmt.Printf("To get the API ID and API Hash, follow the instructions:\n\n") + fmt.Printf("\t1. Login to telegram \"API Development tools\":\n") + fmt.Printf("\t\t%s %s %s\n", blink.Sprint("->"), italic.Sprint("https://my.telegram.org/apps"), blink.Sprint("<-")) + fmt.Printf("\t2. Fill in the form: %s, %s and %s can be any values\n\t you like;\n"+ + "\t3. Choose \"%s\" platform\n"+ + "\t4. Click button.\n\n", + underline.Sprint("App title"), underline.Sprint("Short Name"), underline.Sprint("URL"), + underline.Sprint("Desktop")) + fmt.Printf("You will see the App '%s' and App '%s' values that you will need to\n"+ + "enter shortly. This application will encrypt and save the credentials on your\ndevice. You can delete them any time starting with -reset flag.\n\n", + param.Sprint(" api_id "), param.Sprint(" api_hash ")) + warn.Printf("VERY IMPORTANT: This is the key to your account, keep it secret, never share\n" + + "it with anyone, never publish it online.\n") + fmt.Println(line) + fmt.Println() +} + +func readln(r io.Reader) (string, error) { + line, err := bufio.NewReader(r).ReadString('\n') + if err != nil { + return "", err + } + return strings.TrimSpace(line), nil +} + +func readpass(_ context.Context) (string, error) { + stdin := int(os.Stdin.Fd()) + + oldState, err := term.MakeRaw(stdin) + if err != nil { + return "", err + } + defer term.Restore(stdin, oldState) + + bytePwd, err := term.ReadPassword(stdin) + if err != nil { + return "", err + } + return strings.TrimSpace(string(bytePwd)), nil +} diff --git a/internal/mtp/authflow/util_unix.go b/internal/mtp/authflow/util_unix.go new file mode 100644 index 0000000..6cc15e0 --- /dev/null +++ b/internal/mtp/authflow/util_unix.go @@ -0,0 +1,9 @@ +//go:build !windows + +package authflow + +import "io" + +func clrscr(w io.Writer) { + w.Write([]byte("\033c")) +} diff --git a/internal/mtp/authflow/util_windows.go b/internal/mtp/authflow/util_windows.go new file mode 100644 index 0000000..9ea09c3 --- /dev/null +++ b/internal/mtp/authflow/util_windows.go @@ -0,0 +1,9 @@ +// go:build windows + +package authflow + +import "io" + +func clrscr(w io.Writer) { + return +} diff --git a/internal/mtp/bg/bg.go b/internal/mtp/bg/bg.go new file mode 100644 index 0000000..123d7ae --- /dev/null +++ b/internal/mtp/bg/bg.go @@ -0,0 +1,82 @@ +// Package bg implements wrapper for running client in background. +// +// TODO: Once https://github.com/gotd/contrib/pull/216 is merged can be removed. +package bg + +import ( + "context" + "errors" +) + +// Client abstracts telegram client. +type Client interface { + Run(ctx context.Context, f func(ctx context.Context) error) error +} + +// StopFunc closes Client and waits until Run returns. +type StopFunc func() error + +type connectOptions struct { + ctx context.Context +} + +// Option for Connect. +type Option interface { + apply(o *connectOptions) +} + +type fnOption func(o *connectOptions) + +func (f fnOption) apply(o *connectOptions) { + f(o) +} + +// WithContext sets base context for client. +func WithContext(ctx context.Context) Option { + return fnOption(func(o *connectOptions) { + o.ctx = ctx + }) +} + +// Connect blocks until client is connected, calling Run internally in +// background. +func Connect(client Client, options ...Option) (StopFunc, error) { + opt := &connectOptions{ + ctx: context.Background(), + } + for _, o := range options { + o.apply(opt) + } + + ctx, cancel := context.WithCancel(opt.ctx) + + initDone := make(chan struct{}) + errC := make(chan error, 1) + go func() { + defer close(errC) + errC <- client.Run(ctx, func(ctx context.Context) error { + close(initDone) + <-ctx.Done() + if errors.Is(ctx.Err(), context.Canceled) { + return nil + } + return ctx.Err() + }) + }() + + select { + case <-ctx.Done(): // context cancelled + cancel() + return func() error { return nil }, ctx.Err() + case err := <-errC: // startup timeout + cancel() + return func() error { return nil }, err + case <-initDone: // init done + } + + stopFn := func() error { + cancel() + return <-errC + } + return stopFn, nil +} diff --git a/internal/mtp/creds_storage.go b/internal/mtp/creds_storage.go new file mode 100644 index 0000000..236b040 --- /dev/null +++ b/internal/mtp/creds_storage.go @@ -0,0 +1,72 @@ +package mtp + +import ( + "encoding/json" + "io" + "os" + + "github.com/rusq/wipemychat/internal/secure" +) + +type credsStorage struct { + filename string + passphrase []byte +} + +// creds is the structure of data in the storage. +type creds struct { + ApiID secure.Int `json:"api_id,omitempty"` + ApiHash secure.String `json:"api_hash,omitempty"` +} + +func (cs credsStorage) IsAvailable() bool { + return cs.filename != "" && len(cs.passphrase) > 0 +} + +func (cs credsStorage) Save(apiID int, apiHash string) error { + if err := secure.SetPassphrase(cs.passphrase); err != nil { + return err + } + f, err := os.Create(cs.filename) + if err != nil { + return err + } + defer f.Close() + + return cs.write(f, apiID, apiHash) +} + +func (cs credsStorage) write(f io.Writer, apiID int, apiHash string) error { + creds := creds{ + ApiID: secure.Int(apiID), + ApiHash: secure.String(apiHash), + } + + enc := json.NewEncoder(f) + if err := enc.Encode(creds); err != nil { + return err + } + return nil +} + +func (cs credsStorage) Load() (int, string, error) { + if err := secure.SetPassphrase(cs.passphrase); err != nil { + return 0, "", err + } + f, err := os.Open(cs.filename) + if err != nil { + return 0, "", err + } + defer f.Close() + + return cs.read(f) +} + +func (cs credsStorage) read(r io.Reader) (int, string, error) { + var creds creds + dec := json.NewDecoder(r) + if err := dec.Decode(&creds); err != nil { + return 0, "", err + } + return int(creds.ApiID), creds.ApiHash.String(), nil +} diff --git a/internal/mtp/creds_storage_test.go b/internal/mtp/creds_storage_test.go new file mode 100644 index 0000000..833a9c9 --- /dev/null +++ b/internal/mtp/creds_storage_test.go @@ -0,0 +1,59 @@ +package mtp + +import ( + "bytes" + "testing" + + "github.com/stretchr/testify/assert" + + "github.com/rusq/wipemychat/internal/secure" +) + +func init() { + mac := []byte{0xde, 0xfe, 0xc8, 0xed, 0xba, 0xbe} + if err := secure.SetPassphrase(mac); err != nil { + panic(err) + } +} + +func Test_encryptDecrypt(t *testing.T) { + var ( + ApiID = 12345 + ApiHash = "very secure" + ) + var buf bytes.Buffer + cs := credsStorage{} + err := cs.write(&buf, ApiID, ApiHash) + assert.NoError(t, err) + + gotID, gotHash, gotErr := cs.read(&buf) + assert.NoError(t, gotErr) + assert.Equal(t, ApiID, gotID) + assert.Equal(t, ApiHash, gotHash) + +} + +func FuzzWriteRead(f *testing.F) { + type testcase struct { + id int + hash string + } + var testcases = []testcase{{12345, "very secure"}, {0, "12345"}, {42, ""}, {-100, "blah"}} + for _, tc := range testcases { + f.Add(tc.id, tc.hash) + } + cs := credsStorage{} + f.Fuzz(func(t *testing.T, id int, hash string) { + var buf bytes.Buffer + err := cs.write(&buf, id, hash) + if err != nil { + return + } + gotID, gotHash, gotErr := cs.read(&buf) + if gotErr != nil { + return + } + assert.Equal(t, id, gotID) + assert.Equal(t, hash, gotHash) + }) +} diff --git a/internal/mtp/dialogs.go b/internal/mtp/dialogs.go new file mode 100644 index 0000000..ab30014 --- /dev/null +++ b/internal/mtp/dialogs.go @@ -0,0 +1,110 @@ +package mtp + +import ( + "context" + "errors" + "runtime/trace" + + "github.com/gotd/contrib/storage" + + "github.com/gotd/td/telegram/query/dialogs" + "github.com/gotd/td/tg" +) + +// GetChats retrieves the account chats. +func (c *Client) GetChats(ctx context.Context) ([]Entity, error) { + return c.GetEntities(ctx, FilterChat()) +} + +// GetChannels retrieves the account channels. +func (c *Client) GetChannels(ctx context.Context) ([]Entity, error) { + return c.GetEntities(ctx, FilterChannel()) +} + +// GetEntities ensures that storage is populated, then iterates through storage +// peers calling filterFn for each peer. The filterFn should return Entity and +// true, if the peer satisfies the criteria, or nil and false, otherwise. +func (c *Client) GetEntities(ctx context.Context, filterFn FilterFunc) ([]Entity, error) { + ctx, task := trace.NewTask(ctx, "GetEntities") + defer task.End() + + if err := c.ensureStoragePopulated(ctx); err != nil { + return nil, err + } + + peerIter, err := c.storage.Iterate(ctx) + if err != nil { + return nil, err + } + defer peerIter.Close() + + var ee []Entity + + for peerIter.Next(ctx) { + ent, ok := filterFn(peerIter.Value()) + if !ok { + continue + } + ee = append(ee, ent) + } + if err := peerIter.Err(); err != nil { + return nil, err + } + return ee, nil +} + +// ensureStoragePopulated ensures that the peer storage has been populated within +// defCacheEvict duration. +func (c *Client) ensureStoragePopulated(ctx context.Context) error { + if cached, err := c.cache.Get(cacheDlgStorage); err == nil && cached.(bool) { + trace.Log(ctx, "cache", "hit") + return nil + } + // populating the storage + trace.Log(ctx, "cache", "miss") + + dlgIter := dialogs.NewQueryBuilder(c.cl.API()). + GetDialogs(). + BatchSize(defBatchSize). + Iter() + if err := storage.CollectPeers(c.storage).Dialogs(ctx, dlgIter); err != nil { + return err + } + if err := c.cache.SetWithExpire(cacheDlgStorage, true, defCacheEvict); err != nil { + return err + } + + return nil +} + +// CreateChat creates a Chat (not a Mega- or Gigagroup). +// +// Example +// +// if err := cl.CreateChat(ctx, "mtproto-test",123455678, 312849128); err != nil { +// return err +// } +func (c *Client) CreateChat(ctx context.Context, title string, userIDs ...int64) error { + if len(userIDs) == 0 { + return errors.New("at least one user is required") + } + + var others = make([]tg.InputUserClass, len(userIDs)) + for i := range userIDs { + others[i] = &tg.InputUser{UserID: userIDs[i]} + } + + var users = append([]tg.InputUserClass{&tg.InputUserSelf{}}, others...) + + var resp tg.Updates + if err := c.cl.Invoke(ctx, + &tg.MessagesCreateChatRequest{ + Users: users, + Title: title, + }, + &resp, + ); err != nil { + return err + } + return nil +} diff --git a/internal/mtp/dialogs_filters.go b/internal/mtp/dialogs_filters.go new file mode 100644 index 0000000..a612773 --- /dev/null +++ b/internal/mtp/dialogs_filters.go @@ -0,0 +1,25 @@ +package mtp + +import "github.com/gotd/contrib/storage" + +type FilterFunc func(storage.Peer) (ent Entity, ok bool) + +func FilterChat() FilterFunc { + return func(peer storage.Peer) (Entity, bool) { + if peer.Chat != nil { + return peer.Chat, true + } else if peer.Channel != nil && !peer.Channel.Broadcast { + return peer.Channel, true + } + return nil, false + } +} + +func FilterChannel() FilterFunc { + return func(peer storage.Peer) (Entity, bool) { + if peer.Channel != nil && peer.Channel.Broadcast { + return peer.Channel, true + } + return nil, false + } +} diff --git a/internal/mtp/messages.go b/internal/mtp/messages.go new file mode 100644 index 0000000..332ab83 --- /dev/null +++ b/internal/mtp/messages.go @@ -0,0 +1,134 @@ +package mtp + +import ( + "context" + "fmt" + "runtime/trace" + + "github.com/gotd/td/telegram/message" + "github.com/gotd/td/telegram/query" + "github.com/gotd/td/telegram/query/messages" + "github.com/gotd/td/tg" +) + +// SearchAllMyMessages returns the current authorized user messages from chat or +// channel `dlg`. For each API call, the callback function will be invoked, if +// not nil. +func (c *Client) SearchAllMyMessages(ctx context.Context, dlg Entity, cb func(n int)) ([]messages.Elem, error) { + return c.SearchAllMessages(ctx, dlg, &tg.InputPeerSelf{}, cb) +} + +// SearchAllMessages search messages in the chat or channel `dlg`. It finds ALL +// messages from the person `who`. returns a slice of message.Elem. For each API +// call, the callback function will be invoked, if not nil. +func (c *Client) SearchAllMessages(ctx context.Context, dlg Entity, who tg.InputPeerClass, cb func(n int)) ([]messages.Elem, error) { + if cached, err := c.cache.Get(cacheKey(dlg.GetID())); err == nil { + msgs := cached.([]messages.Elem) + if cb != nil { + cb(len(msgs)) + } + return msgs, nil + } + + ip, err := asInputPeer(dlg) + if err != nil { + return nil, err + } + + bld := query.Messages(c.cl.API()). + Search(ip). + BatchSize(defBatchSize). + FromID(who). + Filter(&tg.InputMessagesFilterEmpty{}) + elems, err := collectMessages(ctx, bld, cb) + if err != nil { + return nil, err + } + + if err := c.cache.Set(cacheKey(dlg.GetID()), elems); err != nil { + return nil, err + } + return elems, err +} + +func (c *Client) DeleteMessages(ctx context.Context, dlg Entity, messages []messages.Elem) (int, error) { + ctx, task := trace.NewTask(ctx, "DeleteMessages") + defer task.End() + + ip, err := asInputPeer(dlg) + if err != nil { + trace.Log(ctx, "logic", err.Error()) + return 0, err + } + ids := splitBy(defBatchSize, messages, func(i int) int { return messages[i].Msg.GetID() }) + trace.Logf(ctx, "logic", "split chunks: %d", len(ids)) + + // clearing cache. + if c.cache.Remove(cacheKey(dlg.GetID())) { + trace.Log(ctx, "logic", "cache cleared") + } + + total := 0 + for _, chunk := range ids { + resp, err := message.NewSender(c.cl.API()).To(ip).Revoke().Messages(ctx, chunk...) + if err != nil { + trace.Logf(ctx, "api", "revoke error: %s", err) + return 0, fmt.Errorf("failed to delete: %w", err) + } + total += resp.GetPtsCount() + } + trace.Log(ctx, "logic", "ok") + return total, nil +} + +func asInputPeer(ent Entity) (tg.InputPeerClass, error) { + switch peer := ent.(type) { + case *tg.Chat: + return peer.AsInputPeer(), nil + case *tg.Channel: + return peer.AsInputPeer(), nil + default: + return nil, fmt.Errorf("unsupported input peer type: %T", peer) + } + // unreachable +} + +// splitBy splits the chunk input of M items to X chunks of `n` items. +// For each element of input, the fn is called, that should return +// the value. +func splitBy[T, S any](n int, input []S, fn func(i int) T) [][]T { + var out [][]T = make([][]T, 0, len(input)/n) + var chunk []T + for i := range input { + if i > 0 && i%n == 0 { + out = append(out, chunk) + chunk = make([]T, 0, n) + } + chunk = append(chunk, fn(i)) + } + if len(chunk) > 0 { + out = append(out, chunk) + } + return out +} + +// collectMessages is the copy/pasta from the td/telegram/message package with added +// optional callback function. It creates iterator and collects all elements to +// slice, calling callback function for each iteration, if it's not nil. +func collectMessages(ctx context.Context, b *messages.SearchQueryBuilder, cb func(n int)) ([]messages.Elem, error) { + iter := b.Iter() + c, err := iter.Total(ctx) + if err != nil { + return nil, fmt.Errorf("get total: %w", err) + } + + r := make([]messages.Elem, 0, c) + for iter.Next(ctx) { + r = append(r, iter.Value()) + if cb != nil { + cb(1) + } + } + + return r, iter.Err() +} diff --git a/internal/mtp/messages_test.go b/internal/mtp/messages_test.go new file mode 100644 index 0000000..a8332c7 --- /dev/null +++ b/internal/mtp/messages_test.go @@ -0,0 +1,87 @@ +package mtp + +import ( + "reflect" + "testing" +) + +func Test_splitBy(t *testing.T) { + var ( + testInputEven = []int{1, 2, 3, 4, 5} + testInputOdd = []int{1, 2, 3, 4, 5, 6} + testInputSngl = []int{42} + ) + type args struct { + n int + input []int + fn func(i int) int8 + } + tests := []struct { + name string + args args + want [][]int8 + }{ + { + "splits as expected (even)", + args{ + n: 2, + input: testInputEven, + fn: func(i int) int8 { + return int8(testInputEven[i]) + }, + }, + [][]int8{{1, 2}, {3, 4}, {5}}, + }, + { + "splits as expected (odd)", + args{ + n: 2, + input: testInputOdd, + fn: func(i int) int8 { + return int8(testInputOdd[i]) + }, + }, + [][]int8{{1, 2}, {3, 4}, {5, 6}}, + }, + { + "splits as expected (odd)", + args{ + n: 3, + input: testInputOdd, + fn: func(i int) int8 { + return int8(testInputOdd[i]) + }, + }, + [][]int8{{1, 2, 3}, {4, 5, 6}}, + }, + { + "splits as expected (empty)", + args{ + n: 2, + input: []int{}, + fn: func(i int) int8 { + return 0 + }, + }, + [][]int8{}, + }, + { + "splits as expected (one)", + args{ + n: 2, + input: testInputSngl, + fn: func(i int) int8 { + return int8(testInputSngl[i]) + }, + }, + [][]int8{{42}}, + }, + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + if got := splitBy(tt.args.n, tt.args.input, tt.args.fn); !reflect.DeepEqual(got, tt.want) { + t.Errorf("splitBy() = %v, want %v", got, tt.want) + } + }) + } +} diff --git a/internal/mtp/mtp.go b/internal/mtp/mtp.go new file mode 100644 index 0000000..a30d6dc --- /dev/null +++ b/internal/mtp/mtp.go @@ -0,0 +1,220 @@ +// Package mtp provides some functions for the gotd/td functions +package mtp + +import ( + "context" + "errors" + "fmt" + "io" + "time" + + "github.com/bluele/gcache" + "github.com/gotd/contrib/middleware/floodwait" + "github.com/gotd/contrib/storage" + "github.com/gotd/td/session" + "github.com/gotd/td/tdp" + "github.com/gotd/td/telegram" + "github.com/gotd/td/telegram/auth" + "github.com/mattn/go-colorable" + "github.com/rusq/dlog" + "go.uber.org/zap" + "go.uber.org/zap/zapcore" + + "github.com/rusq/wipemychat/internal/mtp/authflow" + "github.com/rusq/wipemychat/internal/mtp/bg" +) + +const ( + defBatchSize = 100 + defCacheEvict = 10 * time.Minute + defCacheSz = 20 +) + +var ( + // ErrAlreadyRunning is returned if the attempt is made to start the client, + // while there's another instance running asynchronously. + ErrAlreadyRunning = errors.New("already running asynchronously, stop the running instance first") +) + +type Client struct { + cl *telegram.Client + + cache gcache.Cache + storage storage.PeerStorage + creds credsStorage + + waiter *floodwait.SimpleWaiter + waiterStop func() + + stop bg.StopFunc + + auth authflow.FullAuthFlow + sendcodeOpts auth.SendCodeOptions + telegramOpts telegram.Options +} + +// Entity interface is the subset of functions that are commonly defined on most +// entities in telegram lib. It can be a user, a chat or channel, or any other +// telegram Entity. +type Entity interface { + GetID() int64 + GetTitle() string + TypeInfo() tdp.Type + Zero() bool +} + +type cacheKey int64 + +const ( + cacheDlgStorage cacheKey = iota +) + +type Option func(c *Client) + +func WithMTPOptions(opts telegram.Options) Option { + return func(c *Client) { + c.telegramOpts = opts + } +} + +// WithStorage allows to specify custom session storage. +func WithStorage(path string) Option { + return func(c *Client) { + c.telegramOpts.SessionStorage = &session.FileStorage{Path: path} + } +} + +// WithPeerStorage allows to specify a custom storage for peer data. +func WithPeerStorage(s storage.PeerStorage) Option { + return func(c *Client) { + if s == nil { + return + } + c.storage = s + } +} + +// WithAuth allows to override the authorization flow +func WithAuth(flow authflow.FullAuthFlow) Option { + return func(c *Client) { + c.auth = flow + } +} + +func WithApiCredsFile(path string, passphrase []byte) Option { + return func(c *Client) { + c.creds = credsStorage{filename: path, passphrase: passphrase} + } +} + +func WithDebug(enable bool) Option { + return func(c *Client) { + if !enable { + c.telegramOpts.Logger = nil + return + } + cfg := zap.NewDevelopmentEncoderConfig() + cfg.EncodeLevel = zapcore.CapitalColorLevelEncoder + c.telegramOpts.Logger = zap.New(zapcore.NewCore( + zapcore.NewConsoleEncoder(cfg), + zapcore.AddSync(colorable.NewColorableStdout()), + zapcore.DebugLevel, + )) + } +} + +func New(appID int, appHash string, opts ...Option) (*Client, error) { + // Client with the default parameters + var c = Client{ + cache: gcache.New(defCacheSz).LFU().Expiration(defCacheEvict).Build(), + storage: NewMemStorage(), + + auth: authflow.TermAuth{}, // default is the terminal authentication + waiter: floodwait.NewSimpleWaiter(), + + telegramOpts: telegram.Options{}, + } + + for _, opt := range opts { + opt(&c) + } + + c.telegramOpts.Middlewares = append(c.telegramOpts.Middlewares, c.waiter) + if (appID == 0 || appHash == "") && c.creds.IsAvailable() { + var err error + appID, appHash, err = c.loadCredentials() + if err != nil { + return nil, err + } + } + + c.cl = telegram.NewClient(appID, appHash, c.telegramOpts) + + return &c, nil +} + +func (c *Client) loadCredentials() (int, string, error) { + var err error + apiID, apiHash, err := c.creds.Load() + if err == nil && apiID > 0 && apiHash != "" { + return apiID, apiHash, nil + } + dlog.Debugf("warning: error loading credentials file, requesting manual input: %s", err) + apiID, apiHash, err = c.auth.GetAPICredentials(context.Background()) + if err != nil { + fmt.Println() + if errors.Is(io.EOF, err) { + return 0, "", errors.New("exit") + } + return 0, "", err + } + if err := c.creds.Save(apiID, apiHash); err != nil { + // not a fatal error + dlog.Debugf("failed to save credentials: %s", err) + } + return apiID, apiHash, nil +} + +// Start starts the telegram session in goroutine +func (c *Client) Start(ctx context.Context) error { + if c.stop != nil { + return ErrAlreadyRunning + } + + stop, err := bg.Connect(c.cl) + if err != nil { + return err + } + c.stop = stop + + flow := auth.NewFlow(c.auth, c.sendcodeOpts) + if err := c.cl.Auth().IfNecessary(ctx, flow); err != nil { + if err := c.Stop(); err != nil { + dlog.Debugf("error stopping: %s", err) + } + return err + } + dlog.Debug("auth success") + + return nil +} + +func (c *Client) Stop() error { + if c.stop != nil { + if c.waiterStop != nil { + defer c.waiterStop() + } + return c.stop() + } + return nil +} + +// Run runs an arbitrary telegram session. +func (c *Client) Run(ctx context.Context, fn func(context.Context, *telegram.Client) error) error { + if c.stop != nil { + return ErrAlreadyRunning + } + return c.cl.Run(ctx, func(ctx context.Context) error { + return fn(ctx, c.cl) + }) +} diff --git a/internal/mtp/peer_storage.go b/internal/mtp/peer_storage.go new file mode 100644 index 0000000..972f0e8 --- /dev/null +++ b/internal/mtp/peer_storage.go @@ -0,0 +1,129 @@ +package mtp + +import ( + "context" + "errors" + "sort" + "sync" + + "github.com/gotd/contrib/storage" +) + +// MemStorage is the default peer storage for MTP. It uses a map to store all +// peers, hence, it's not a persistent store. +type MemStorage struct { + s map[string]storage.Peer + + mu sync.RWMutex + iterating bool + + // iterator + keys []string + keyIdx int + + iterErr error +} + +func NewMemStorage() *MemStorage { + return &MemStorage{ + s: make(map[string]storage.Peer, 0), + } +} + +func (ms *MemStorage) Add(_ context.Context, value storage.Peer) error { + ms.mu.Lock() + defer ms.mu.Unlock() + + key := storage.KeyFromPeer(value).String() + ms.s[key] = value + return nil +} + +func (ms *MemStorage) Find(ctx context.Context, key storage.PeerKey) (storage.Peer, error) { + return ms.Resolve(ctx, key.String()) +} + +func (ms *MemStorage) Assign(_ context.Context, key string, value storage.Peer) error { + ms.mu.Lock() + defer ms.mu.Unlock() + + ms.s[key] = value + + return nil +} + +func (ms *MemStorage) Resolve(_ context.Context, key string) (storage.Peer, error) { + ms.mu.RLock() + defer ms.mu.RUnlock() + + peer, ok := ms.s[key] + if !ok { + return storage.Peer{}, storage.ErrPeerNotFound + } + return peer, nil +} + +func (ms *MemStorage) Iterate(ctx context.Context) (storage.PeerIterator, error) { + select { + case <-ctx.Done(): + return nil, ctx.Err() + default: + } + if ms.IsIterating() { + return nil, errors.New("already iterating") + } + + // preparing the iterator + ms.mu.Lock() + ms.keys = make([]string, 0, len(ms.s)) + for k := range ms.s { + ms.keys = append(ms.keys, k) + } + sort.Strings(ms.keys) + ms.keyIdx = -1 // set the passphrase start value + + ms.iterating = true + ms.iterErr = nil + ms.mu.Unlock() + + // locking for iteration + ms.mu.RLock() + return ms, nil +} + +func (ms *MemStorage) Next(ctx context.Context) bool { + select { + case <-ctx.Done(): + ms.iterErr = ctx.Err() + return false + default: + } + ms.keyIdx++ + return ms.keyIdx < len(ms.keys) +} + +func (ms *MemStorage) Err() error { + return ms.iterErr +} + +func (ms *MemStorage) Value() storage.Peer { + if !ms.IsIterating() { + return storage.Peer{} + } + return ms.s[ms.keys[ms.keyIdx]] +} + +func (ms *MemStorage) Close() error { + if !ms.IsIterating() { + return nil + } + ms.mu.RUnlock() + ms.mu.Lock() + ms.iterating = false + ms.mu.Unlock() + return nil +} + +func (ms *MemStorage) IsIterating() bool { + return ms.iterating +} diff --git a/internal/secure/int.go b/internal/secure/int.go new file mode 100644 index 0000000..1f111f5 --- /dev/null +++ b/internal/secure/int.go @@ -0,0 +1,44 @@ +package secure + +import ( + "bytes" + "fmt" + "strconv" +) + +type Int int + +func (ei Int) String() string { + return strconv.Itoa(int(ei)) +} + +func (ei Int) MarshalJSON() ([]byte, error) { + data, err := Encrypt(ei.String()) + return []byte(`"` + data + `"`), err +} + +func (ei *Int) UnmarshalJSON(b []byte) error { + b = bytes.Trim(b, `"`) + if len(b) == 0 { + *ei = 0 + return nil + } + pt, err := Decrypt(string(b)) + if err != nil { + if err == ErrNotEncrypted { + val, err := strconv.Atoi(string(b)) + if err != nil { + return err + } + *ei = Int(val) + return nil + } + return fmt.Errorf("%w, while decrypting: %q", err, string(b)) + } + val, err := strconv.Atoi(pt) + if err != nil { + return err + } + *ei = Int(val) + return nil +} diff --git a/internal/secure/int_test.go b/internal/secure/int_test.go new file mode 100644 index 0000000..c65867c --- /dev/null +++ b/internal/secure/int_test.go @@ -0,0 +1,45 @@ +package secure + +import ( + "math" + "testing" +) + +func TestInt_MarshalUnmarshalJSON(t *testing.T) { + s := newTestKeySentinel() + defer s.Reset() + + testcases := []int{123, -1, math.MaxInt} + for _, tc := range testcases { + val := Int(tc) + data, err := val.MarshalJSON() + if err != nil { + t.Fatal(err) + } + var got Int + if err := got.UnmarshalJSON(data); err != nil { + t.Fatal(err) + } + } +} + +func FuzzMarshalUnmarshalJSON(f *testing.F) { + s := newTestKeySentinel() + defer s.Reset() + + testcases := []int{123, -1, math.MaxInt} + for _, tc := range testcases { + f.Add(tc) + } + f.Fuzz(func(t *testing.T, input int) { + val := Int(input) + data, err := val.MarshalJSON() + if err != nil { + t.Fatal(err) + } + var got Int + if err := got.UnmarshalJSON(data); err != nil { + t.Fatal(err) + } + }) +} diff --git a/internal/secure/secure.go b/internal/secure/secure.go new file mode 100644 index 0000000..dd6e434 --- /dev/null +++ b/internal/secure/secure.go @@ -0,0 +1,343 @@ +// Package secure provides encryption and decryption functions. +// +// Encryption implementation +// +// "Salt" is a fixed 256 byte array of pseudo-random values, taken from +// /dev/urandom. +// +// Encryption key is a 256-bit value (32 bytes). +// +// Encryption key is derived in the following manner: +// +// 1. Repeat bytes of the passphrase to form 32 bytes of the Key +// 2. Take the first byte of the passphrase and use it for the value of Offset in +// the Salt array. +// 3. For each byte of the key, and `i` being the counter: +// - `Key[i] ^= Salt[(Offset+i)%Key_length] +// +// Then the plain text is encrypted with the Key using AES-256 in GCM and signed +// together with additional data. +// +// Then additional data, nonce and ciphertext are packed into the following +// sequence of bytes: +// +// |_|__...__|_________|__...__| +// ^ ^ ^ ^ +// | | | +- ciphertext, n bytes. +// | | +---------- nonce, (nonceSz bytes) +// | +------------------- additinal data, m bytes, (maxDataSz bytes), +// +------------------------ additional data length value (adlSz bytes). +// +// After this, packed byte sequence is armoured with base64 and the signature +// prefix added to it to distinct it from the plain text. +package secure + +import ( + "bytes" + "crypto/aes" + "crypto/cipher" + "crypto/rand" + "encoding/base64" + "errors" + "fmt" + "io" + "strings" +) + +const ( + nonceSz = 12 // bytes, nonce sz + keyBits = 256 // encryption gKey size. + keySz = keyBits / 8 // bytes, gKey size + adlSz = 1 // bytes, size of additional data length field + maxDataSz = 1<<(adlSz*8) - 1 // bytes, max additional data size (this is maximum that can fit into (adlSz) bytes) + + signature = "TGD." // used to identified encrypted strings + sigSz = len(signature) +) + +// salt will be used to XOR the gKey which we generate by padding the passphrase. +var salt = [keySz * 8]byte{ + 0x1a, 0x98, 0x15, 0x70, 0xbf, 0x57, 0x16, 0x35, 0xba, 0x78, 0x1e, 0xbc, + 0x97, 0x09, 0x24, 0x47, 0xe7, 0xa6, 0xac, 0x72, 0x0d, 0x60, 0x28, 0x8b, + 0x40, 0x13, 0x02, 0x0d, 0xd6, 0x38, 0xa3, 0xfa, 0x95, 0x14, 0xc6, 0x7d, + 0x65, 0x3d, 0xb2, 0xd9, 0x86, 0x4f, 0x61, 0x5f, 0xa5, 0xe7, 0xdc, 0x30, + 0x52, 0x49, 0x0c, 0x6d, 0x1a, 0xea, 0x2b, 0x5b, 0xf6, 0x4a, 0x5f, 0xd2, + 0xfd, 0x01, 0x1a, 0xc8, 0x48, 0x68, 0xcf, 0x7b, 0xfa, 0x64, 0xc7, 0x46, + 0x82, 0xdc, 0x78, 0xb6, 0xc0, 0x80, 0x07, 0xb5, 0xa0, 0x79, 0x3f, 0xcb, + 0xe5, 0xee, 0x55, 0x72, 0x74, 0x66, 0x6d, 0xe4, 0x8e, 0xed, 0xd1, 0xff, + 0xba, 0x6b, 0x51, 0xf7, 0xca, 0xfe, 0x43, 0x3f, 0xbd, 0x37, 0xb5, 0x37, + 0xa3, 0xa4, 0x05, 0x44, 0xd4, 0x1f, 0xb9, 0xd9, 0xc0, 0x2f, 0x41, 0xa6, + 0xe9, 0x14, 0x6b, 0xef, 0xdd, 0x67, 0x0d, 0x5e, 0x10, 0x31, 0xca, 0xdc, + 0xd1, 0x42, 0xdd, 0x9d, 0xef, 0x14, 0x7f, 0xff, 0x4d, 0x03, 0x65, 0xdc, + 0x66, 0x5d, 0x92, 0x4c, 0x23, 0x89, 0xf7, 0x62, 0x9d, 0x2a, 0x06, 0xe1, + 0x66, 0x0a, 0x47, 0x24, 0xd3, 0x08, 0xc1, 0x04, 0x45, 0xb5, 0xcd, 0x1c, + 0x61, 0x08, 0x52, 0xf5, 0x4e, 0xb8, 0xbd, 0x47, 0x69, 0x30, 0xec, 0x02, + 0x61, 0xf9, 0xd8, 0xc9, 0x93, 0x20, 0x8b, 0x33, 0xe9, 0x96, 0xab, 0xd4, + 0x43, 0x91, 0x59, 0xe0, 0x4e, 0x45, 0x5c, 0xda, 0x57, 0x0e, 0x12, 0x77, + 0xa4, 0xe2, 0x0d, 0x7e, 0xee, 0xe3, 0x2e, 0x80, 0x98, 0x39, 0xd1, 0x98, + 0x34, 0x4e, 0x3f, 0xff, 0xcf, 0xca, 0x1f, 0xe6, 0x36, 0xfc, 0x58, 0x12, + 0xfd, 0x8e, 0x28, 0x83, 0x74, 0xbc, 0xf9, 0xeb, 0xf8, 0xd3, 0x4f, 0x39, + 0x35, 0x74, 0x5d, 0xa7, 0x65, 0x64, 0x0b, 0x13, 0x38, 0x0e, 0x4b, 0x63, + 0xcf, 0x47, 0x64, 0xf2, +} + +var ( + ErrNotEncrypted = errors.New("string not encrypted") + ErrNoEncryptionKey = errors.New("no encryption gKey") + ErrDataOverflow = errors.New("additional data overflow") + ErrInvalidKeySz = errors.New("invalid Key size") +) + +// CipherError indicates that there was an error during decrypting of +// ciphertext. +type CipherError struct { + Err error +} + +func (e *CipherError) Error() string { + return e.Err.Error() +} + +func (e *CipherError) Unwrap() error { + return e.Err +} + +func (e *CipherError) Is(target error) bool { + t, ok := target.(*CipherError) + if !ok { + return false + } + return e.Err.Error() == t.Err.Error() +} + +type CorruptError struct { + Value []byte +} + +func (e *CorruptError) Error() string { + return "corrupt packed data" +} + +func (e *CorruptError) Is(target error) bool { + t, ok := target.(*CorruptError) + if !ok { + return false + } + return bytes.Equal(t.Value, e.Value) +} + +var gKey []byte + +// setGlobalKey sets the encryption gKey globally. +func setGlobalKey(k []byte) error { + if len(k) != keySz { + return ErrInvalidKeySz + } + gKey = k + return nil +} + +func SetPassphrase(b []byte) error { + k, err := deriveKey(b) + if err != nil { + return err + } + return setGlobalKey(k) +} + +// deriveKey interpolates the passphrase value to the gKey size and xors it with salt. +func deriveKey(pass []byte) ([]byte, error) { + if len(pass) == 0 { + return nil, errors.New("empty passphrase") + } + if len(pass) > keySz { + return nil, errors.New("passphrase is too big") + } + + var key = make([]byte, keySz) + var startOffset = int(pass[0]) // starting offset in salt is the first byte of the password + + for i := range key { + key[i] = pass[i%len(pass)] ^ salt[(i+startOffset)%len(salt)] + } + return key, nil +} + +// Encrypt encrypts the plain text password to use in the configuration file +// with the gKey generated by KeyFn. +func Encrypt(plaintext string) (string, error) { + return encrypt(plaintext, gKey, nil) +} + +// Decrypt attempts to decrypt the string and return the password. +// In case s is not an encrypted string, ErrNotEncrypted returned along with +// original string. +func Decrypt(s string) (string, error) { + return decrypt(s, gKey) +} + +// EncryptWithPassphrase encrypts plaintext with the provided passphrase +func EncryptWithPassphrase(plaintext string, passphrase []byte) (string, error) { + key, err := deriveKey(passphrase) + if err != nil { + return "", err + } + return encrypt(plaintext, key, nil) +} + +// DecryptWithPassphrase attempts to descrypt string with the provided MAC +// address. +func DecryptWithPassphrase(s string, passphrase []byte) (string, error) { + key, err := deriveKey(passphrase) + if err != nil { + return "", err + } + return decrypt(s, key) +} + +// Encrypt encrypts the plain text password to use in the configuration file. +func encrypt(plaintext string, key []byte, additionalData []byte) (string, error) { + if len(key) == 0 { + return "", ErrNoEncryptionKey + } + if len(key) != keySz { + return "", ErrInvalidKeySz + } + if len(plaintext) == 0 { + return "", errors.New("nothing to encrypt") + } + if len(additionalData) > maxDataSz { + return "", fmt.Errorf("size of additional data can't exceed %d B", maxDataSz) + } + + gcm, err := initGCM(key) + if err != nil { + return "", err + } + + nonce := make([]byte, nonceSz) + if _, err := io.ReadFull(rand.Reader, nonce); err != nil { + return "", err + } + ciphertext := gcm.Seal(nil, nonce, []byte(plaintext), additionalData) + + // return signature + base64.StdEncoding.EncodeToString(data), nil + packed, err := pack(ciphermsg{nonce, ciphertext, additionalData}) + if err != nil { + return "", err + } + + return armor(packed), nil +} + +// initGCM initialises the Galois/Counter Mode +func initGCM(key []byte) (cipher.AEAD, error) { + block, err := aes.NewCipher(key) + if err != nil { + return nil, err + } + return cipher.NewGCM(block) +} + +func pack(cm ciphermsg) ([]byte, error) { + if len(cm.nonce) == 0 { + return nil, errors.New("pack: empty nonce") + } + if len(cm.ciphertext) == 0 { + return nil, errors.New("pack: no ciphertext") + } + dataLen := len(cm.additionalData) + if dataLen > maxDataSz { + return nil, ErrDataOverflow + } + + packed := make([]byte, nonceSz+len(cm.ciphertext)+1+dataLen) + packed[0] = byte(dataLen) + if dataLen > 0 { + copy(packed[adlSz:], cm.additionalData) + } + copy(packed[adlSz+dataLen:], cm.nonce) + copy(packed[adlSz+dataLen+nonceSz:], cm.ciphertext) + + return packed, nil +} + +func armor(packed []byte) string { + return signature + base64.StdEncoding.EncodeToString(packed) +} + +func unarmor(s string) ([]byte, error) { + s = strings.TrimSpace(s) + if len(s) < sigSz || s[0:sigSz] != signature { + return nil, ErrNotEncrypted + } + packed, err := base64.StdEncoding.DecodeString(s[sigSz:]) + if err != nil { + return nil, err + } + return packed, nil +} + +type ciphermsg struct { + nonce []byte + ciphertext []byte + additionalData []byte +} + +func unpack(packed []byte) (*ciphermsg, error) { + if len(packed) == 0 { + return nil, errors.New("unpack: empty input") + } + var ( + dataLen = int(packed[0]) + payloadSz = len(packed) - adlSz - nonceSz // payload is data + ct size + ) + if dataLen > payloadSz || payloadSz-dataLen == 0 { + return nil, &CorruptError{packed} + } + cm := &ciphermsg{ + nonce: packed[adlSz+dataLen : adlSz+dataLen+nonceSz], + ciphertext: packed[adlSz+dataLen+nonceSz:], + } + if dataLen > 0 { + cm.additionalData = packed[adlSz : adlSz+dataLen] + } + return cm, nil +} + +func decrypt(s string, key []byte) (string, error) { + packed, err := unarmor(s) + if err != nil { + if err == ErrNotEncrypted { + return s, err + } + return "", err // other error + } + if len(key) == 0 { + return "", ErrNoEncryptionKey + } + cm, err := unpack(packed) + if err != nil { + return "", err + } + aesgcm, err := initGCM(key) + if err != nil { + return "", err + } + + plaintext, err := aesgcm.Open(nil, cm.nonce, cm.ciphertext, cm.additionalData) + if err != nil { + return "", &CipherError{err} + } + return string(plaintext), nil +} + +// IsDecryptError returns true if there was a decryption error or corrupt data +// error and false if it's a different kind of error. +func IsDecryptError(err error) bool { + switch err.(type) { + case *CipherError, *CorruptError: + return true + } + return false +} diff --git a/internal/secure/secure_test.go b/internal/secure/secure_test.go new file mode 100644 index 0000000..39f2107 --- /dev/null +++ b/internal/secure/secure_test.go @@ -0,0 +1,390 @@ +package secure + +import ( + "bytes" + "errors" + "fmt" + "log" + "reflect" + "testing" + + "github.com/stretchr/testify/assert" +) + +const ( + encryptedPlainText = "TGD.APO/yw5Y6DjATD6ShhbAH/mBRYLXgV09wSUT5YJ82UgU/98iCQBx" +) + +var testPassphrase = []byte{0, 0, 0, 0, 0, 0} + +func TestEncryptPlainText(t *testing.T) { + out, err := EncryptWithPassphrase("plain text", testPassphrase) + if err != nil { + fmt.Println("brokeh:", err) + return + } + t.Log(out) + // Output: +} + +func testNonce(b byte) []byte { + var n = make([]byte, nonceSz) + for i := range n { + n[i] = b + } + return n +} + +func Test_deriveKey(t *testing.T) { + type args struct { + pass []byte + } + tests := []struct { + name string + args args + want []byte + wantErr bool + }{ + {"zero", args{testPassphrase}, salt[:keyBits/8], false}, + {"offset 1", + args{[]byte{1, 0, 0, 0, 0, 0}}, + // salt bytes, offset 1, every 6-th byte is XORed with 0x01: + []byte{0x99, 0x15, 0x70, 0xbf, 0x57, 0x16, 0x34, 0xba, 0x78, 0x1e, 0xbc, 0x97, 0x8, 0x24, 0x47, 0xe7, 0xa6, 0xac, 0x73, 0xd, 0x60, 0x28, 0x8b, 0x40, 0x12, 0x2, 0xd, 0xd6, 0x38, 0xa3, 0xfb, 0x95}, + false, + }, + {"empty pass", args{nil}, nil, true}, + {"invalid len", args{make([]byte, keyBits/8+1)}, nil, true}, + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + got, err := deriveKey(tt.args.pass) + if (err != nil) != tt.wantErr { + t.Errorf("deriveKey() error = %v, wantErr %v", err, tt.wantErr) + return + } + if !reflect.DeepEqual(got, tt.want) { + t.Errorf("deriveKey() got = %#v, want %#v", got, tt.want) + } + }) + } +} + +// to reset it's value. +type keySentinel struct { + oldKey []byte +} + +// newKeySentinel sets the global gKey to the specified value. Call Reset() on +// the sentinel to reset the initial variable value. +func newKeySentinel(k []byte) keySentinel { + m := keySentinel{gKey} + if err := setGlobalKey(k); err != nil { + panic(err) + } + return m +} + +// Reset resets the old value of KeyFromHwAddr +func (m keySentinel) Reset() { + if err := setGlobalKey(m.oldKey); err != nil { + log.Printf("this is ok: %s", err) + } +} + +// newTestKeySentinel sets the gKey to test password +func newTestKeySentinel() keySentinel { + k, err := deriveKey(testPassphrase) + if err != nil { + panic(err) + } + return newKeySentinel(k) +} + +func Test_Encryption(t *testing.T) { + const testPT = "plain text" + + m := newTestKeySentinel() + defer m.Reset() + + key, err := deriveKey(testPassphrase) + if err != nil { + t.Fatal(err) + } + ct, err := encrypt(testPT, key, []byte("123")) + if err != nil { + t.Fatal(err) + } + t.Log(ct) + pt, err := decrypt(ct, key) + if err != nil { + t.Fatal(err) + } + assert.Equal(t, testPT, pt) +} + +func Test_EncryptDecryptWithPassphrase(t *testing.T) { + const testPT = "plain text" + + ct, err := EncryptWithPassphrase(testPT, []byte("1234567890")) + if err != nil { + t.Fatal(err) + } + t.Log(ct) + pt, err := DecryptWithPassphrase(ct+" ", []byte("1234567890")) + if err != nil { + t.Error(err) + } + assert.Equal(t, testPT, pt) + + // trying to decrypt with different passphrase should return error + pt, err = DecryptWithPassphrase(ct, []byte("11:22:33:44:55:66")) + if err == nil { + t.Errorf("should have failed to decrypt, but did not, pt=%v", pt) + } +} + +func TestDecrypt(t *testing.T) { + z := newTestKeySentinel() + defer z.Reset() + + type args struct { + s string + } + + tests := []struct { + name string + args args + want string + wantErr bool + }{ + {"encrypted password", args{encryptedPlainText}, "plain text", false}, + {"trim", args{" " + encryptedPlainText + "\n"}, "plain text", false}, + {"invalid base64", args{encryptedPlainText[:len(encryptedPlainText)-1]}, "", true}, + {"non-encrypted password", args{"plain text"}, "plain text", true}, + {"signature, but non-encrypted (error)", args{signature + "plain text"}, "", true}, + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + got, err := Decrypt(tt.args.s) + if (err != nil) != tt.wantErr { + t.Errorf("Decrypt() error = %v, wantErr %v", err, tt.wantErr) + return + } + if got != tt.want { + t.Errorf("Decrypt() got = %v, want %v", got, tt.want) + } + }) + } +} + +var ( + validPacked = bytesjoin([]byte{3, 1, 2, 3}, testNonce(0xcc), []byte{4, 5, 6}) + validCm = ciphermsg{ + additionalData: []byte{1, 2, 3}, + nonce: testNonce(0xcc), + ciphertext: []byte{4, 5, 6}, + } +) + +func Test_pack(t *testing.T) { + type args struct { + cm ciphermsg + } + tests := []struct { + name string + args args + want []byte + wantErr bool + }{ + {"packing ok", + args{validCm}, + validPacked, + false, + }, + {"data too big", + args{ciphermsg{ + additionalData: make([]byte, maxDataSz+1), + nonce: testNonce(0xcc), + ciphertext: []byte{4, 5, 6}}}, + nil, + true, + }, + {"empty additional data", + args{ciphermsg{ + additionalData: nil, + nonce: testNonce(0xcc), + ciphertext: []byte{255, 254, 253}, + }}, + bytesjoin([]byte{0}, testNonce(0xcc), []byte{255, 254, 253}), + false, + }, + {"empty nonce", + args{ciphermsg{ + additionalData: []byte{1, 2, 3}, + nonce: nil, + ciphertext: []byte{255, 254, 253}, + }}, + nil, + true, + }, + {"empty ct", + args{ciphermsg{ + additionalData: []byte{1, 2, 3}, + nonce: testNonce(0xcc), + ciphertext: nil, + }}, + nil, + true, + }, + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + got, err := pack(tt.args.cm) + if (err != nil) != tt.wantErr { + t.Errorf("pack() error = %v, wantErr %v", err, tt.wantErr) + return + } + if !bytes.Equal(got, tt.want) { + t.Errorf("pack() = %v, want %v", got, tt.want) + } + }) + } +} + +func Test_unpack(t *testing.T) { + type args struct { + packed []byte + } + tests := []struct { + name string + args args + want *ciphermsg + wantErr bool + }{ + {"ok", + args{validPacked}, + &validCm, + false, + }, + {"empty input", args{}, nil, true}, + {"invalid data length", + args{bytesjoin([]byte{6, 1, 2, 3}, testNonce(0xcc), []byte{4, 5, 6})}, + nil, + true, + }, + {"empty data", + args{bytesjoin([]byte{0}, testNonce(0xcc), []byte{4, 5, 6})}, + &ciphermsg{ + additionalData: nil, + nonce: testNonce(0xcc), + ciphertext: []byte{4, 5, 6}, + }, + false, + }, + {"empty CT", + args{bytesjoin([]byte{1, 0xdd}, testNonce(0xcc))}, + nil, + true, + }, + {"empty everything except data", + args{[]byte{1, 0xdd}}, + nil, + true, + }, + {"nothing to do", + args{[]byte{0}}, + nil, + true, + }, + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + got, err := unpack(tt.args.packed) + if (err != nil) != tt.wantErr { + t.Errorf("unpack() error = %v, wantErr %v", err, tt.wantErr) + return + } + if !reflect.DeepEqual(got, tt.want) { + t.Errorf("unpack() = %v, want %v", got, tt.want) + } + }) + } +} + +// bytejoin aims to declutter the bytes.Join call in tests. +func bytesjoin(bb ...[]byte) []byte { + return bytes.Join(bb, []byte{}) +} + +func Test_armor(t *testing.T) { + type args struct { + packed []byte + } + tests := []struct { + name string + args args + want string + }{ + {"ok", args{validPacked}, signature + "AwECA8zMzMzMzMzMzMzMzAQFBg=="}, + {"another one", args{}, signature}, + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + if got := armor(tt.args.packed); got != tt.want { + t.Errorf("armor() = %v, want %v", got, tt.want) + } + }) + } +} + +func Test_unarmor(t *testing.T) { + type args struct { + s string + } + tests := []struct { + name string + args args + want []byte + wantErr bool + }{ + {"plain text", args{"some text"}, nil, true}, + {"illegal base64", args{signature + "hey you"}, nil, true}, + {"armored data", args{signature + "AwECA8zMzMzMzMzMzMzMzAQFBg=="}, validPacked, false}, + {"empty text", args{""}, nil, true}, + {"trim space", args{" " + signature + "AwECA8zMzMzMzMzMzMzMzAQFBg== "}, validPacked, false}, + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + got, err := unarmor(tt.args.s) + if (err != nil) != tt.wantErr { + t.Errorf("unarmor() error = %v, wantErr %v", err, tt.wantErr) + return + } + if !reflect.DeepEqual(got, tt.want) { + t.Errorf("unarmor() = %v, want %v", got, tt.want) + } + }) + } +} + +func TestIsDecryptError(t *testing.T) { + type args struct { + err error + } + tests := []struct { + name string + args args + want bool + }{ + {"cipher", args{&CipherError{nil}}, true}, + {"corrupt", args{&CorruptError{nil}}, true}, + {"other", args{errors.New("your shotgun is nearby")}, false}, + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + if got := IsDecryptError(tt.args.err); got != tt.want { + t.Errorf("IsDecryptError() = %v, want %v", got, tt.want) + } + }) + } +} diff --git a/internal/secure/string.go b/internal/secure/string.go new file mode 100644 index 0000000..3e2bcd9 --- /dev/null +++ b/internal/secure/string.go @@ -0,0 +1,39 @@ +package secure + +import ( + "bytes" + "fmt" +) + +// String is a type of encrypted string. Surprise. +type String string + +func (es String) String() string { + return string(es) +} + +func (es String) MarshalJSON() ([]byte, error) { + if len(es) == 0 { + return []byte(`""`), nil + } + data, err := Encrypt(string(es)) + return []byte(`"` + data + `"`), err +} + +func (es *String) UnmarshalJSON(b []byte) error { + b = bytes.Trim(b, `"`) + if len(b) == 0 { + *es = "" + return nil + } + pt, err := Decrypt(string(b)) + if err != nil { + if err == ErrNotEncrypted { + *es = String(b) + return nil + } + return fmt.Errorf("%w, while decrypting: %q", err, string(b)) + } + *es = String(pt) + return nil +} diff --git a/internal/secure/string_test.go b/internal/secure/string_test.go new file mode 100644 index 0000000..e888ff2 --- /dev/null +++ b/internal/secure/string_test.go @@ -0,0 +1,108 @@ +package secure + +import ( + "bytes" + "encoding/json" + "reflect" + "testing" + + "github.com/stretchr/testify/assert" +) + +const sampleJson = ` +{ + "id": 24, + "username": "hide_ur_pain", + "secret": "` + encryptedPlainText + `" +} +` + +type testType struct { + ID int `json:"id"` + Username string `json:"username"` + Secret String `json:"secret"` +} + +var testStruct = testType{ + ID: 24, + Username: "hide_ur_pain", + Secret: "plain text", +} + +func TestString_UnmarshalJSONtoStruct(t *testing.T) { + z := newTestKeySentinel() + defer z.Reset() + + var got testType + err := json.Unmarshal([]byte(sampleJson), &got) + assert.NoError(t, err, "Unmarshal() unexpected error") + assert.Equal(t, testStruct, got) +} + +func TestString_UnmarshalJSON(t *testing.T) { + z := newTestKeySentinel() + defer z.Reset() + + type args struct { + b []byte + } + tests := []struct { + name string + args args + wantES String + wantErr bool + }{ + {"unencrypted", args{[]byte("unencrypted")}, "unencrypted", false}, + {"unencrypted quoted", args{[]byte("\"unencrypted\"")}, "unencrypted", false}, + {"encrypted", args{[]byte(encryptedPlainText)}, "plain text", false}, + {"encrypted quoted", args{[]byte(`"` + encryptedPlainText + `"`)}, "plain text", false}, + {"invalid", args{[]byte(signature + "i must break you")}, "", true}, + {"empty", args{[]byte{}}, "", false}, + {"empty quoted", args{[]byte(`""`)}, "", false}, + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + var es String + if err := es.UnmarshalJSON(tt.args.b); (err != nil) != tt.wantErr { + t.Errorf("UnmarshalJSON() error = %v, wantErr %v", err, tt.wantErr) + } + assert.Equal(t, string(tt.wantES), string(es)) + }) + } +} + +func TestString_MarshalJSON(t *testing.T) { + z := newTestKeySentinel() + defer z.Reset() + + tests := []struct { + name string + es String + want string + wantErr bool + }{ + {"plain text", String("plain text"), "plain text", false}, + {"empty", String(""), ``, false}, + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + encrypted, err := tt.es.MarshalJSON() + if (err != nil) != tt.wantErr { + t.Errorf("MarshalJSON() error = %v, wantErr %v", err, tt.wantErr) + return + } + + encrypted = bytes.Trim(encrypted, `"`) + if len(encrypted) == 0 && len(tt.want) == 0 { + return // all good, empty string is an empty string. + } + got, err := Decrypt(string(encrypted)) + if err != nil { + t.Errorf("unexpected decrypt error: %s", err) + } + if !reflect.DeepEqual(got, tt.want) { + t.Errorf("MarshalJSON() got = %v, want %v", got, tt.want) + } + }) + } +} diff --git a/internal/sys/sys.go b/internal/sys/sys.go new file mode 100644 index 0000000..a099dfc --- /dev/null +++ b/internal/sys/sys.go @@ -0,0 +1,35 @@ +package sys + +import ( + "errors" + "net" +) + +// Errors. +var ( + ErrNetNoIface = errors.New("unable find a suitable interface") +) + +// FindIface returns name of the first active interface with non-nil MAC +// address. +func FindIface() (string, error) { + interfaces, err := net.Interfaces() + if err != nil { + return "", err + } + for _, i := range interfaces { + if i.Flags&net.FlagUp != 0 && len(i.HardwareAddr) > 0 { + return i.Name, nil + } + } + return "", ErrNetNoIface +} + +// IfaceMAC returns the MAC address for the Interface. +func IfaceMAC(name string) (net.HardwareAddr, error) { + iface, err := net.InterfaceByName(name) + if err != nil { + return nil, err + } + return iface.HardwareAddr, nil +} diff --git a/internal/sys/sys_test.go b/internal/sys/sys_test.go new file mode 100644 index 0000000..fbdbc41 --- /dev/null +++ b/internal/sys/sys_test.go @@ -0,0 +1,36 @@ +package sys + +import ( + "bytes" + "testing" +) + +var testMAC = []byte{0, 0, 0, 0, 0, 0} + +func TestFindIface(t *testing.T) { + t.Run("normal run", func(t *testing.T) { + nif, err := FindIface() + if err != nil { + t.Errorf("unexpected error: %s", err) + } + if nif == "" { + t.Errorf("expected interface name, got: %q", nif) + } + }) +} + +func TestIfaceMAC(t *testing.T) { + t.Run("mac for real interface", func(t *testing.T) { + nif, err := FindIface() + if err != nil { + t.Errorf("FindIface() unexpected error: %s", err) + } + mac, err := IfaceMAC(nif) + if err != nil { + t.Fatalf("IfaceMAC() unexpected error: %s", err) + } + if len(mac) == 0 || bytes.Equal(testMAC, mac) { + t.Errorf("unexpected mac value: %v", mac) + } + }) +} diff --git a/internal/tui/app.go b/internal/tui/app.go new file mode 100644 index 0000000..1ef5ab1 --- /dev/null +++ b/internal/tui/app.go @@ -0,0 +1,137 @@ +package tui + +import ( + "context" + "fmt" + + "github.com/gdamore/tcell/v2" + "github.com/gotd/td/telegram/query/messages" + "github.com/looplab/fsm" + "github.com/rivo/tview" + "github.com/rusq/dlog" + "github.com/rusq/osenv/v2" + + "github.com/rusq/wipemychat/internal/mtp" +) + +const ( + btnYes = "Yes" + btnNo = "No" + btnOK = "OK" +) + +type App struct { + tva *tview.Application + tg telegramer + log *dlog.Logger + fsm *fsm.FSM + + pages *tview.Pages + view views +} + +type telegramer interface { + GetChats(ctx context.Context) ([]mtp.Entity, error) + SearchAllMyMessages(ctx context.Context, dlg mtp.Entity, cb func(n int)) ([]messages.Elem, error) + DeleteMessages(ctx context.Context, dlg mtp.Entity, messages []messages.Elem) (int, error) +} + +type views struct { + main *tview.Flex + mbConfirm *tview.Modal + mbNothing *tview.Modal + fmSearch *tview.Form + + lvChats *tview.List + tvLog *tview.TextView +} + +func New(tg telegramer) *App { + app := &App{ + tva: tview.NewApplication(), + tg: tg, + + pages: tview.NewPages(), + view: views{ + main: tview.NewFlex(), + mbConfirm: tview.NewModal(), + mbNothing: tview.NewModal(), + fmSearch: tview.NewForm(), + + lvChats: tview.NewList(), + tvLog: tview.NewTextView(), + }, + } + + app.initMain() + app.initFind() + app.initConfirm() + app.initNothing() + + app.tva.SetInputCapture(app.handleKeystrokes) + + app.log = dlog.New(app.view.tvLog, "", dlog.Flags(), osenv.Value("DEBUG", "") != "") + + // init finite state machine + app.fsm = initFSM(app) + + return app +} + +func (app *App) Run(ctx context.Context, chats []mtp.Entity) error { + app.populateChatList(ctx, chats) + + if err := app.tva.SetRoot(app.pages, true).EnableMouse(false).Run(); err != nil { + return err + } + return nil +} + +func (app *App) logf(format string, a ...any) { + app.log.Printf(format, a...) +} + +func (app *App) error(err error) { + app.log.Printf("ERROR: %s", err) +} + +func (app *App) handleKeystrokes(event *tcell.EventKey) *tcell.EventKey { + if app.fsm.Current() == stDeleting { + // we do not process keystrokes until deletion is finished. + return event + } + + switch event.Key() { + case tcell.KeyCtrlQ, tcell.KeyF10: + app.tva.Stop() + default: + return event + } + return nil +} + +// cancel sends a evCancelled event. +func (app *App) cancel() { + app.event(evCancelled) +} + +// event sends an event to FSM, will return true, if there were no errors. +func (app *App) event(event string) bool { + if err := app.fsm.Event(event); err != nil { + app.error(err) + return false + } + return true +} + +func (app *App) printf(format string, a ...any) { + _, _ = fmt.Fprintf(app.view.tvLog, format, a...) +} + +// modal wraps a primitive in a modal box. +func modal(p tview.Primitive, width int, height int) tview.Primitive { + return tview.NewGrid(). + SetColumns(0, width, 0). + SetRows(0, height, 0). + AddItem(p, 1, 1, 1, 1, 0, 0, true) +} diff --git a/internal/tui/chatlist.go b/internal/tui/chatlist.go new file mode 100644 index 0000000..2b17816 --- /dev/null +++ b/internal/tui/chatlist.go @@ -0,0 +1,136 @@ +package tui + +import ( + "context" + "fmt" + + "github.com/gdamore/tcell/v2" + "github.com/rivo/tview" + + "github.com/rusq/wipemychat/internal/mtp" +) + +const infoText = "Press [Ctrl+Q] or [F10] to quit, [Ctrl+F] or [/] to search chats" + +func (app *App) initMain() { + app.view.lvChats. + SetHighlightFullLine(true). + SetSelectedBackgroundColor(tcell.Color190). + SetSelectedTextColor(tcell.ColorBlack). + SetMainTextColor(tcell.Color190). + ShowSecondaryText(true). + SetBorder(true). + SetInputCapture(app.chatInputCapture). + SetTitle("[ Chats ]") + + app.view.tvLog. + SetWordWrap(true). + SetScrollable(true). + SetChangedFunc(func() { app.tva.Draw() }). + SetBorder(true). + SetTitle("[ Information ]") + + // main is the main screen, split in two parts. + workspace := tview.NewFlex(). + AddItem(app.view.lvChats, 0, 25, true). + AddItem(app.view.tvLog, 0, 75, false) + + // The bottom row is the help message + info := tview.NewTextView(). + SetDynamicColors(true). + SetWrap(false). + SetTextAlign(tview.AlignCenter). + SetTextColor(tcell.ColorRed). + SetText(infoText) + + mainScreen := tview.NewFlex(). + SetDirection(tview.FlexRow). + AddItem(workspace, 0, 1, true). + AddItem(info, 1, 1, false) + + app.pages.AddPage(stSelecting, mainScreen, true, true) + +} + +func (app *App) populateChatList(ctx context.Context, chats []mtp.Entity) { + for _, chat := range chats { + app.view.lvChats.AddItem( + chat.GetTitle(), + fmt.Sprintf(" %s (%d)", chat.TypeInfo().Name, chat.GetID()), + 0, + func() { app.handleChats(ctx, chats) }, + ) + } +} + +func (app *App) handleChats(ctx context.Context, chats []mtp.Entity) { + if !app.event(evSelected) { + return + } + + selected := chats[app.view.lvChats.GetCurrentItem()] + // async fetch is needed so that the tvLog will keep updating. + go app.runDelete(selected) +} + +func (app *App) runDelete(selected mtp.Entity) { + // disable input on lvChats + app.view.lvChats.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey { return nil }) + defer func() { + // once finished collecting information, reenable the input. + app.view.lvChats.SetInputCapture(app.chatInputCapture) + }() + app.view.tvLog.Clear() + + app.logf("Scanning chat: %s, please wait...", selected.GetTitle()) + total := 0 + msgs, err := app.tg.SearchAllMyMessages(context.Background(), selected, func(n int) { + total += n + if total > 0 && total%100 == 0 { + app.printf("...%d", total) + } + }) + if total > 0 { + app.printf("...%d\n", total) + } + if err != nil { + app.error(err) + app.cancel() + return + } + app.logf("Scan complete, found %d messages", len(msgs)) + + if len(msgs) == 0 { + // show nothing to do message. + if !app.event(evNothingToDo) { + app.cancel() + } + return + } + + app.fsm.SetMetadata(metaChat, selected) + app.fsm.SetMetadata(metaMessages, msgs) + app.view.mbConfirm.SetText(fmt.Sprintf("Found %d messages in %q. Delete?", len(msgs), selected.GetTitle())) + + if !app.event(evFetched) { + app.cancel() + return + } +} + +func (app *App) chatInputCapture(event *tcell.EventKey) *tcell.EventKey { + switch event.Key() { + case tcell.KeyCtrlF: + if !app.event(evSearch) { + return event + } + case tcell.KeyRune: + switch event.Rune() { + case '/': + if !app.event(evSearch) { + return event + } + } + } + return event +} diff --git a/internal/tui/confirm.go b/internal/tui/confirm.go new file mode 100644 index 0000000..5589889 --- /dev/null +++ b/internal/tui/confirm.go @@ -0,0 +1,66 @@ +package tui + +import ( + "context" + "fmt" + + "github.com/gdamore/tcell/v2" + "github.com/gotd/td/telegram/query/messages" + + "github.com/rusq/wipemychat/internal/mtp" +) + +func (app *App) initConfirm() { + app.pages.AddPage(stConfirming, app.view.mbConfirm, false, false) + app.view.mbConfirm. + AddButtons([]string{btnYes, btnNo}). + SetDoneFunc(app.handleConfirm). + SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey { + if event.Key() == tcell.KeyESC { + app.cancel() + return nil + } + return event + }) +} + +func (app *App) handleConfirm(_ int, buttonLabel string) { + var err error + switch buttonLabel { + case btnYes: + if !app.event(evConfirmed) { + return + } + err = app.handleDelete() + case btnNo: + app.cancel() + default: + err = nil + } + if err != nil { + app.error(err) + } +} + +// handleDelete handles the deletion of the messages. It gets the chat +// and messages to delete from the FSM Metadata. +func (app *App) handleDelete() error { + defer app.event(evDeleted) + chat, err := metadata[mtp.Entity](app.fsm, metaChat) + if err != nil { + return fmt.Errorf("chat missing: %s", err) + } + + msgs, err := metadata[[]messages.Elem](app.fsm, metaMessages) + if err != nil { + return fmt.Errorf("messages missing: %s", err) + } + app.logf("Deleting %d messages from %s, please wait . . .", len(msgs), chat.GetTitle()) + n, err := app.tg.DeleteMessages(context.Background(), chat, msgs) + if err != nil { + return err + } + app.logf("%d messages deleted in %q", n, chat.GetTitle()) + + return nil +} diff --git a/internal/tui/find.go b/internal/tui/find.go new file mode 100644 index 0000000..9bae891 --- /dev/null +++ b/internal/tui/find.go @@ -0,0 +1,51 @@ +package tui + +import ( + "github.com/gdamore/tcell/v2" + "github.com/rivo/tview" +) + +func (app *App) initFind() { + app.pages.AddPage(stSearching, modal(app.view.fmSearch, 60, 5), true, false) + input := tview.NewInputField().SetLabel("Search") + app.view.fmSearch. + AddFormItem(input). + SetBorder(true). + SetTitle("[ Find Chat ]"). + SetBackgroundColor(tcell.ColorDarkCyan). + SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey { + switch event.Key() { + case tcell.KeyCR: + app.findChat() + input.SetText("") + return nil + case tcell.KeyESC: + app.cancel() + return nil + } + return event + }) +} + +func (app *App) findChat() { + val := app.view.fmSearch.GetFormItem(0).(*tview.InputField) + + text := val.GetText() + if text == "" { + app.logf("search input is empty") + app.cancel() + return + } + + loc := app.view.lvChats.FindItems(text, text, false, true) + if len(loc) == 0 { + app.logf("search term not found: %q", text) + app.cancel() + return + } + + app.view.lvChats.SetCurrentItem(loc[0]) + if !app.event(evLocate) { + return + } +} diff --git a/internal/tui/fsm.go b/internal/tui/fsm.go new file mode 100644 index 0000000..6724e19 --- /dev/null +++ b/internal/tui/fsm.go @@ -0,0 +1,145 @@ +package tui + +import ( + "fmt" + "log" + "os" + + "github.com/looplab/fsm" +) + +type machine struct { + app *App + fsm *fsm.FSM +} + +const ( + // events + evSelected = "selected" + evCancelled = "cancelled" + evConfirmed = "confirmed" + evDeleted = "deleted" + evFetched = "fetched" + evNothingToDo = "nothing_to_do" + evSearch = "search" + evLocate = "locate" + + // states + stSelecting = "selecting" + stSearching = "searching" + stFetching = "fetching" + stConfirming = "confirming" + stDeleting = "deleting" + stNothing = "nothing" + + // metadata + metaMessages = "messages" + metaChat = "chat" +) + +func initFSM(app *App) *fsm.FSM { + m := machine{app: app} + sm := fsm.NewFSM( + stSelecting, + fsm.Events{ + {Name: evSelected, Src: []string{stSelecting}, Dst: stFetching}, + {Name: evFetched, Src: []string{stFetching}, Dst: stConfirming}, + {Name: evNothingToDo, Src: []string{stFetching}, Dst: stNothing}, + {Name: evConfirmed, Src: []string{stConfirming}, Dst: stDeleting}, + {Name: evDeleted, Src: []string{stDeleting}, Dst: stSelecting}, + // search + {Name: evSearch, Src: []string{stSelecting}, Dst: stSearching}, + {Name: evLocate, Src: []string{stSearching}, Dst: stSelecting}, + // cancel + {Name: evCancelled, Src: []string{stFetching, stConfirming, stNothing, stSearching}, Dst: stSelecting}, + }, + fsm.Callbacks{ + m.enter("state"): func(e *fsm.Event) { + m.app.log.Debugf("*** transition: %q -> %q\n", e.Src, e.Dst) + m.app.pages.ShowPage(e.Dst) + }, + // states + m.leave(stConfirming): m.hidePage, + m.leave(stNothing): m.hidePage, + m.leave(stSearching): m.hidePage, + m.leave(stDeleting): m.leaveDeleting, + // events + m.after(evCancelled): m.afterCancelled, + }, + ) + m.fsm = sm + + return m.fsm +} + +func (*machine) leave(state string) string { + return "leave_" + state +} + +func (*machine) enter(state string) string { + return "enter_" + state +} + +func (*machine) after(event string) string { + return "after_" + event +} + +// +// States +// + +func (m *machine) hidePage(e *fsm.Event) { + m.app.pages.HidePage(e.Src) +} + +func (m *machine) leaveDeleting(e *fsm.Event) { + m.cleanUp() + m.hidePage(e) +} + +// +// Events +// + +func (m *machine) afterCancelled(*fsm.Event) { + // clear metadata + m.cleanUp() + m.app.logf("Operation cancelled") +} + +func (m *machine) cleanUp() { + m.fsm.SetMetadata(metaChat, nil) + m.fsm.SetMetadata(metaMessages, nil) +} + +// eventValue allows to get an event value at idx. +func eventValue[T any](e *fsm.Event, idx int) (T, bool) { + var ret T + if len(e.Args)-1 < idx { + return ret, false + } + ret, ok := e.Args[idx].(T) + if !ok { + return ret, false + } + return ret, true +} + +func metadata[T any](fsm *fsm.FSM, key string) (T, error) { + var ret T + val, ok := fsm.Metadata(key) + if !ok || val == nil { + return ret, fmt.Errorf("value of type %T not present in metadata", ret) + } + ret, ok = val.(T) + if !ok { + return ret, fmt.Errorf("invalid type (metadata: %T, want %T)", val, ret) + } + return ret, nil +} + +func visualise(m *fsm.FSM) { + if err := os.WriteFile("fsm.dot", []byte(fsm.Visualize(m)), 0666); err != nil { + log.Panicf("error writing fsm: %s", err) + } +} diff --git a/internal/tui/nothing.go b/internal/tui/nothing.go new file mode 100644 index 0000000..b02e227 --- /dev/null +++ b/internal/tui/nothing.go @@ -0,0 +1,11 @@ +package tui + +func (app *App) initNothing() { + app.pages.AddPage(stNothing, app.view.mbNothing, false, false) + app.view.mbNothing. + SetDoneFunc(func(_ int, _ string) { + app.cancel() + }). + SetText("There are no messages to delete"). + AddButtons([]string{btnOK}) +} diff --git a/main.go b/main.go new file mode 100644 index 0000000..e32bdb5 --- /dev/null +++ b/main.go @@ -0,0 +1,246 @@ +package main + +import ( + "context" + "flag" + "fmt" + "io" + "os" + "os/signal" + "path/filepath" + "sort" + "strings" + "syscall" + "time" + + "github.com/fatih/color" + "github.com/gotd/td/session" + "github.com/gotd/td/telegram" + "github.com/joho/godotenv" + "github.com/rusq/dlog" + "github.com/rusq/osenv/v2" + "github.com/rusq/tracer" + "github.com/schollz/progressbar/v3" + + "github.com/rusq/wipemychat/internal/mtp" + "github.com/rusq/wipemychat/internal/mtp/authflow" + "github.com/rusq/wipemychat/internal/sys" + "github.com/rusq/wipemychat/internal/tui" +) + +const cacheDirName = "tgmsg_revoker" + +const AppName = "Wipe My Chat for Telegram" + +var ( + version = "dev" + builtOn = "just now" + gitCommit = "" + gitRef = "" + + versionSig = fmt.Sprintf("%s %s (built %s)", AppName, version, builtOn) +) + +var _ = godotenv.Load() // load environment variables from .env, if present + +type Params struct { + CacheDirName string + ApiID int + ApiHash string + Phone string + Reset bool + + Version bool + Verbose bool + Trace string + + cacheDir string +} + +func main() { + p, err := parseCmdLine() + if err != nil { + dlog.Fatal(err) + } + if p.Version { + ver(os.Stdout) + return + } + + dlog.SetDebug(p.Verbose) + + if err := p.initCacheDir(cacheDirName); err != nil { + dlog.Fatalf("failed to create cache directory: %s", err) + } + + dlog.SetDebug(p.Verbose) + + if err := run(context.Background(), p); err != nil { + dlog.Fatal(err) + } +} + +func parseCmdLine() (Params, error) { + var p = Params{CacheDirName: cacheDirName} + { + flag.IntVar(&p.ApiID, "api-id", osenv.Secret("APP_ID", 0), "Telegram API ID") + flag.StringVar(&p.ApiHash, "api-token", osenv.Secret("APP_HASH", ""), "Telegram API token") + flag.StringVar(&p.Phone, "phone", osenv.Value("PHONE", ""), "phone `number` in international format for authentication (optional)") + flag.BoolVar(&p.Reset, "reset", false, "reset authentication") + + flag.BoolVar(&p.Version, "v", false, "print version and exit") + flag.BoolVar(&p.Verbose, "verbose", osenv.Value("DEBUG", "") != "", "verbose output") + flag.StringVar(&p.Trace, "trace", osenv.Value("TRACE_FILE", ""), "trace `filename`") + + flag.Parse() + } + return p, nil +} + +func (p *Params) initCacheDir(appName string) error { + cacheDir, err := os.UserCacheDir() + if err != nil { + return err + } + cacheDir = filepath.Join(cacheDir, appName) + if err := os.MkdirAll(cacheDir, 0700); err != nil { + return err + } + p.cacheDir = cacheDir + return nil +} + +func unlink(path string) error { + if err := os.Remove(path); err != nil && !os.IsNotExist(err) { + return err + } + return nil +} + +func run(ctx context.Context, p Params) error { + if p.Trace != "" { + tr := tracer.New(p.Trace) + if err := tr.Start(); err != nil { + return err + } + defer tr.End() + } + + header(os.Stdout) + fmt.Println() + + sessStorage := session.FileStorage{Path: filepath.Join(p.cacheDir, "session.dat")} + apiCredsFile := filepath.Join(p.cacheDir, "telegram.dat") + if p.Reset { + if err := unlink(sessStorage.Path); err != nil { + return err + } + if err := unlink(apiCredsFile); err != nil { + return err + } + } + + opts := telegram.Options{ + SessionStorage: &sessStorage, + } + + iface, err := sys.FindIface() + if err != nil { + return err + } + key, err := sys.IfaceMAC(iface) + if err != nil { + return err + } + + cl, err := mtp.New(p.ApiID, p.ApiHash, + mtp.WithAuth(authflow.NewTermAuth(p.Phone)), + mtp.WithApiCredsFile(apiCredsFile, key), + mtp.WithMTPOptions(opts), + mtp.WithDebug(p.Verbose), + ) + if err != nil { + return err + } + + dlog.Println("Connecting to telegram . . .") + if err := cl.Start(ctx); err != nil { + return err + } + defer func() { + if err := cl.Stop(); err != nil { + dlog.Printf("stop error: %s", err) + } + }() + + ctx, stop := signal.NotifyContext(ctx, os.Interrupt, syscall.SIGTERM) + defer stop() + + done, finished := fakeProgress("Getting chats . . .", 0) + chats, err := cl.GetChats(ctx) + close(done) + <-finished + + if err != nil { + return err + } + sort.Slice(chats, func(i, j int) bool { + return chats[i].GetTitle() < chats[j].GetTitle() + }) + dlog.Printf("got %d chats", len(chats)) + + tva := tui.New(cl) + if err := tva.Run(ctx, chats); err != nil { + return err + } + + return nil +} + +// fakeProgress starts a fake spinner and returns a channel that must be closed +// once the operation completes. interval is interval between iterations. If not +// set, will default to 50ms. +func fakeProgress(title string, interval time.Duration) (chan<- struct{}, <-chan struct{}) { + if interval == 0 { + interval = 50 * time.Millisecond + } + done := make(chan struct{}) + finished := make(chan struct{}) + go func() { + bar := progressbar.NewOptions( + -1, + progressbar.OptionSetDescription(title), + progressbar.OptionSetPredictTime(false), + progressbar.OptionSpinnerType(9), + ) + t := time.NewTicker(interval) + defer t.Stop() + + for { + select { + case <-done: + bar.Finish() + fmt.Println() + close(finished) + return + case <-t.C: + bar.Add(1) + } + } + }() + return done, finished +} + +func header(w io.Writer) { + fmt.Fprintf(w, + "%s\n%s\n%s\n", versionSig, strings.Repeat("-", len(versionSig)), + color.New(color.Italic).Sprint("In loving memory of V. Gorban, 1967-2022."), + ) +} + +func ver(w io.Writer) { + header(w) + if gitCommit != "" { + fmt.Fprintf(w, "commit: %s ref: %s\n", gitCommit, gitRef) + } +}