Add support for SCRAM PLUS variants and mechanism pinning.
Martin Dosch
8 months ago
parent
df33680a0b
commit
7dbbcf45e7
@ -0,0 +1,72 @@
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// Copyright Martin Dosch.
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// Use of this source code is governed by the BSD-2-clause
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// license that can be found in the LICENSE file.
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package main
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import (
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"errors"
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"fmt"
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"os"
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"os/user"
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"strings"
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)
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func findPinFilePath(username string) (string, error) {
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osDataDir := os.Getenv("$XDG_DATA_HOME")
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if osDataDir == "" {
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// Get the current user.
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curUser, err := user.Current()
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if err != nil {
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return strError, fmt.Errorf("findConfig: failed to get current user: %w", err)
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}
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// Get home directory.
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home := curUser.HomeDir
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if home == "" {
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return strError, errors.New("no home directory found")
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}
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osDataDir = home + "/.local/share/"
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}
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authPinFilePath := osDataDir + "/go-sendxmpp/" + username + "/"
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return authPinFilePath, nil
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}
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// Opens the auth mechanism pin file and returns the value.
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func parsePinFile(user string) (string, error) {
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// Find auth pin file
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authPinFile, err := findPinFilePath(user)
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if err != nil {
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return "", err
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}
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// Read file.
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m, err := os.ReadFile(authPinFile + "authmechanism")
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if err != nil {
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return "", err
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}
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// Strip trailing newline.
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mechanism := strings.TrimSuffix(string(m), "\n")
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return mechanism, nil
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}
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// Writes the used mechanism to the auth pin file.
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func writePinFile(mechanism string, user string) error {
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// Find auth pin file
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authPinFilePath, err := findPinFilePath(user)
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if err != nil {
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return err
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}
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if _, err = os.Stat(authPinFilePath); os.IsNotExist(err) {
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err = os.MkdirAll(authPinFilePath, defaultDirRights)
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if err != nil {
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return fmt.Errorf("writePinFile: could not create folder for auth pin file: %w", err)
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}
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}
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err = os.WriteFile(authPinFilePath+"authmechanism", []byte(mechanism+"\n"), 0o400)
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if err != nil {
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return err
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}
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return nil
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}
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