From 9344591ce01d954ea969634b3c2d29432dd34bce Mon Sep 17 00:00:00 2001 From: Ilya Sosnovsky Date: Fri, 5 Feb 2021 09:37:12 +0300 Subject: [PATCH] Initial commit --- .dockerignore | 8 ++ .gitignore | 9 ++ Dockerfile | 4 + LICENSE | 201 +++++++++++++++++++++++++++++++++++++++++++++ README.md | 62 ++++++++++++++ auth.sh | 5 ++ build.sh | 3 + go.mod | 14 ++++ go.sum | 33 ++++++++ openvpn-user.go | 212 ++++++++++++++++++++++++++++++++++++++++++++++++ 10 files changed, 551 insertions(+) create mode 100644 .dockerignore create mode 100644 .gitignore create mode 100644 Dockerfile create mode 100644 LICENSE create mode 100644 README.md create mode 100644 auth.sh create mode 100755 build.sh create mode 100644 go.mod create mode 100644 go.sum create mode 100644 openvpn-user.go diff --git a/.dockerignore b/.dockerignore new file mode 100644 index 0000000..83ec10e --- /dev/null +++ b/.dockerignore @@ -0,0 +1,8 @@ +# IntelliJ project files +.idea +*.iml +out +gen + +openvpn-user.db +openvpn-user diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..984f48b --- /dev/null +++ b/.gitignore @@ -0,0 +1,9 @@ +openvpn-user +openvpn-user.db + +# Editor directories and files +.idea +*.suo +*.ntvs* +*.njsproj +*.sln \ No newline at end of file diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..b17a77b --- /dev/null +++ b/Dockerfile @@ -0,0 +1,4 @@ +FROM golang:1.14.2-alpine3.11 AS builder +COPY . /app +RUN cd /app && env CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -ldflags='-linkmode external -extldflags "-static" -s -w' -o openvpn-user + diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..261eeb9 --- /dev/null +++ b/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. + + END OF TERMS AND CONDITIONS + + APPENDIX: How to apply the Apache License to your work. + + To apply the Apache License to your work, attach the following + boilerplate notice, with the fields enclosed by brackets "[]" + replaced with your own identifying information. (Don't include + the brackets!) The text should be enclosed in the appropriate + comment syntax for the file format. We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/README.md b/README.md new file mode 100644 index 0000000..4169d38 --- /dev/null +++ b/README.md @@ -0,0 +1,62 @@ +# openvpn-user + +### disclaimer +Not tested in production environments! + +Use it on your own risk =) + +### Description +A simple tool to use with openvpn when you need to use `–auth-user-pass-verify` or wherever you want + +### Example + +part of openvpn server config +```bash +auth-user-pass-verify /etc/openvpn/scripts/auth.sh via-file +``` + +make sure `openvpn-user` binary available through `PATH` variable +i.e. put it in `/usr/local/sbin/openvpn-user` + +### Usage +``` +usage: openvpn-user [] [ ...] + +Flags: + --help Show context-sensitive help (also try --help-long and --help-man). + --db.path="./openvpn-user.db" path do openvpn-user db + +Commands: + help [...] + Show help. + + db-init + Init db. + + db-migrate + STUB: Migrate db. + + create --user=USER --password=PASSWORD + Create user. + + delete --user=USER + Delete user. + + revoke --user=USER + Revoke user. + + restore --user=USER + Restore user. + + list [] + List active users. + + flags: + --all Show all users include revoked and delete + + auth --user=USER --password=PASSWORD + Auth user. + + change-password --user=USER --password=PASSWORD + Change password +``` diff --git a/auth.sh b/auth.sh new file mode 100644 index 0000000..81f8f08 --- /dev/null +++ b/auth.sh @@ -0,0 +1,5 @@ +#!/usr/bin/env sh + +set -e + +openvpn-user auth --user $(head -1 $1) --password $(tail -1 $1) diff --git a/build.sh b/build.sh new file mode 100755 index 0000000..1e7c40e --- /dev/null +++ b/build.sh @@ -0,0 +1,3 @@ +#!/usr/bin/env bash + +env CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -ldflags='-linkmode external -extldflags "-static" -s -w' -o openvpn-user diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..7ee090a --- /dev/null +++ b/go.mod @@ -0,0 +1,14 @@ +module openvpn-user + +go 1.14 + +require ( + github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 // indirect + github.com/alecthomas/units v0.0.0-20201120081800-1786d5ef83d4 // indirect + github.com/iamacarpet/go-sqlite3-dynamic v0.0.0-20190515092955-345069c6d7b9 + github.com/mattn/go-sqlite3 v1.14.6 + github.com/notti/nocgo v0.0.0-20190619201224-fc443047424c // indirect + github.com/stretchr/testify v1.7.0 // indirect + golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad + gopkg.in/alecthomas/kingpin.v2 v2.2.6 +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..b46dd97 --- /dev/null +++ b/go.sum @@ -0,0 +1,33 @@ +github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 h1:JYp7IbQjafoB+tBA3gMyHYHrpOtNuDiK/uB5uXxq5wM= +github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc= +github.com/alecthomas/units v0.0.0-20201120081800-1786d5ef83d4 h1:EBTWhcAX7rNQ80RLwLCpHZBBrJuzallFHnF+yMXo928= +github.com/alecthomas/units v0.0.0-20201120081800-1786d5ef83d4/go.mod h1:OMCwj8VM1Kc9e19TLln2VL61YJF0x1XFtfdL4JdbSyE= +github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8= +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/iamacarpet/go-sqlite3-dynamic v0.0.0-20190515092955-345069c6d7b9 h1:MDZ6mJ7Ouz9lSwLtD7v2QeDlbdL6rONTAJRNEQqRYC0= +github.com/iamacarpet/go-sqlite3-dynamic v0.0.0-20190515092955-345069c6d7b9/go.mod h1:HSsZaV17NZLgfHsNz3wzjE66Gd2EGlF8OuC0DdPpgPk= +github.com/mattn/go-sqlite3 v1.14.6 h1:dNPt6NO46WmLVt2DLNpwczCmdV5boIZ6g/tlDrlRUbg= +github.com/mattn/go-sqlite3 v1.14.6/go.mod h1:NyWgC/yNuGj7Q9rpYnZvas74GogHl5/Z4A/KQRfk6bU= +github.com/notti/nocgo v0.0.0-20190619201224-fc443047424c h1:3fTZ9+GLtn9eqKC1RGLojMG7St2WsskOeGXKFEhNTlo= +github.com/notti/nocgo v0.0.0-20190619201224-fc443047424c/go.mod h1:kJHUidcvEI83gsDlB+I58aaOuzvJmPfbqrqYjTqmdHA= +github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM= +github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= +github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= +github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4= +github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY= +github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg= +golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w= +golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad h1:DN0cp81fZ3njFcrLCytUHRSUkqBjfTo4Tx9RJTWs0EY= +golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I= +golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= +golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= +golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw= +golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= +gopkg.in/alecthomas/kingpin.v2 v2.2.6 h1:jMFz6MfLP0/4fUyZle81rXUoxOBFi19VUFKVDOQfozc= +gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw= +gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM= +gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo= +gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= diff --git a/openvpn-user.go b/openvpn-user.go new file mode 100644 index 0000000..49c3d93 --- /dev/null +++ b/openvpn-user.go @@ -0,0 +1,212 @@ +package main + +import ( + "database/sql" + "fmt" + _ "github.com/mattn/go-sqlite3" + "golang.org/x/crypto/bcrypt" + "gopkg.in/alecthomas/kingpin.v2" + "os" + "text/tabwriter" +) + +var ( + dbPath = kingpin.Flag("db.path", "path do openvpn-user db").Default("./openvpn-user.db").String() + + dbInitCommand = kingpin.Command("db-init", "Init db.") + dbMigrateCommand = kingpin.Command("db-migrate", "STUB: Migrate db.") + + createCommand = kingpin.Command("create", "Create user.") + createCommandUserFlag = createCommand.Flag("user", "Username.").Required().String() + createCommandPasswordFlag = createCommand.Flag("password", "Password.").Required().String() + + deleteCommand = kingpin.Command("delete", "Delete user.") + deleteCommandUserFlag = deleteCommand.Flag("user", "Username.").Required().String() + + revokeCommand = kingpin.Command("revoke", "Revoke user.") + revokeCommandUserFlag = revokeCommand.Flag("user", "Username.").Required().String() + + restoreCommand = kingpin.Command("restore", "Restore user.") + restoreCommandUserFlag = restoreCommand.Flag("user", "Username.").Required().String() + + listCommand = kingpin.Command("list", "List active users.") + listAll = listCommand.Flag("all", "Show all users include revoked and deleted.").Default("false").Bool() + + authCommand = kingpin.Command("auth", "Auth user.") + authCommandUserFlag = authCommand.Flag("user", "Username.").Required().String() + authCommandPasswordFlag = authCommand.Flag("password", "Password.").Required().String() + + changePasswordCommand = kingpin.Command("change-password", "Change password") + changePasswordCommandUserFlag = changePasswordCommand.Flag("user", "Username.").Required().String() + changePasswordCommandPasswordFlag = changePasswordCommand.Flag("password", "Password.").Required().String() + + //debug = kingpin.Flag("debug", "Enable debug mode.").Default("false").Bool() + //verbose = kingpin.Flag("verbose", "Enable verbose mode.").Default("false").Bool() + +) + +type User struct { + id int64 + name string + password string + revoked bool + deleted bool +} + +func main() { + + switch kingpin.Parse() { + case createCommand.FullCommand(): + createUser(*createCommandUserFlag, *createCommandPasswordFlag) + case deleteCommand.FullCommand(): + deleteUser(*deleteCommandUserFlag) + case revokeCommand.FullCommand(): + revokedUser(*revokeCommandUserFlag) + case restoreCommand.FullCommand(): + restoreUser(*restoreCommandUserFlag) + case listCommand.FullCommand(): + printUsers() + case authCommand.FullCommand(): + authUser(*authCommandUserFlag, *authCommandPasswordFlag) + case changePasswordCommand.FullCommand(): + changeUserPassword(*changePasswordCommandUserFlag, *changePasswordCommandPasswordFlag) + case dbInitCommand.FullCommand(): + initDb() + case dbMigrateCommand.FullCommand(): + migrateDb() + } +} + +func getDb() *sql.DB { + db, err := sql.Open("sqlite3", *dbPath) + checkErr(err) + if db == nil { + panic("db is nil") + } + return db +} + +func initDb() { + // boolean fields are integer because of sqlite does not support boolean: 1 = true, 0 = false + _, err := getDb().Exec("CREATE TABLE IF NOT EXISTS users(id integer not null primary key autoincrement, username string UNIQUE, password string, revoked integer default 0, deleted integer default 0)") + checkErr(err) + fmt.Printf("Database initialized at %s\n", *dbPath) +} + +func migrateDb() { + fmt.Println("STUB: Migrations are up to date") +} + +func createUser(username, password string) { + if !checkUserExistent(username) { + hash, _ := bcrypt.GenerateFromPassword([]byte(password), bcrypt.MinCost) + _, err := getDb().Exec("INSERT INTO users(username, password) VALUES ($1, $2)", username, string(hash)) + checkErr(err) + fmt.Printf("User %s created\n", username) + } +} + +func deleteUser(username string) { + _, err := getDb().Exec("UPDATE users SET deleted = 1 WHERE username = $1", username) + checkErr(err) + fmt.Printf("User %s deleted\n", username) +} + +func revokedUser(username string) { + // TODO: ignore deleted user + _, err := getDb().Exec("UPDATE users SET revoked = 1 WHERE username = $1", username) + checkErr(err) + fmt.Printf("User %s revoked\n", username) +} + +func restoreUser(username string) { + // TODO: ignore deleted user + _, err := getDb().Exec("UPDATE users SET revoked = 0 WHERE username = $1", username) + checkErr(err) + fmt.Printf("User %s restored\n", username) +} + +func checkUserExistent(username string) bool { + // we need to check if there is already such a user + + var c int + _ = getDb().QueryRow("SELECT count(*) FROM users WHERE username = $1", username).Scan(&c) + if c == 1 { + fmt.Printf("WARNING: User %s already registered\n", username) + return true + } else { + return false + } +} + +func listUsers() []User { + condition := "WHERE deleted = 0 AND revoked = 0" + var users []User + if *listAll { + condition = "" + } + query := "SELECT * FROM users " + condition + rows, err := getDb().Query(query) + checkErr(err) + + for rows.Next() { + u := User{} + err := rows.Scan(&u.id, &u.name, &u.password, &u.revoked, &u.deleted) + if err != nil { + fmt.Println(err) + continue + } + users = append(users, u) + } + + return users +} + +func printUsers() { + ul := listUsers() + if len(ul) > 0 { + w := tabwriter.NewWriter(os.Stdout, 0, 0, 1, ' ', tabwriter.TabIndent|tabwriter.Debug) + _, _ = fmt.Fprintln(w, "id\t username\t revoked\t deleted") + for _, u := range ul { + fmt.Fprintf(w, "%d\t %s\t %v\t %v\n", u.id, u.name, u.revoked, u.deleted) + } + _ = w.Flush() + } else { + fmt.Println("No users created yet") + } +} + +func changeUserPassword(username, password string) { + hash, _ := bcrypt.GenerateFromPassword([]byte(password), bcrypt.MinCost) + _, err := getDb().Exec("UPDATE users SET password = $1 WHERE username = $2", hash, username) + checkErr(err) + + fmt.Println("Password changed") +} + +func authUser(username, password string) { + + row := getDb().QueryRow("select * from users where username = $1", username) + u := User{} + err := row.Scan(&u.id, &u.name, &u.password, &u.revoked, &u.deleted) + checkErr(err) + + if ! u.revoked && ! u.deleted { + err = bcrypt.CompareHashAndPassword([]byte(u.password), []byte(password)) + if err != nil { + fmt.Println("Passwords mismatched") + os.Exit(1) + } else { + fmt.Println("Auth successful") + os.Exit(0) + } + } + fmt.Println("Authorization failed") + os.Exit(1) +} + +func checkErr(err error) { + if err != nil { + panic(err) + } +}