electron/docs/api/safe-storage.md
Darshan Sen 03e68e2efe
fix: fix a crash in safeStorage on Linux (#33913)
On Linux, `isEncryptionAvailable()` was crashing instead of returning a
boolean before the 'ready' event was emitted by the app. The reason of
the crash is that [`CreateKeyStorage()`](https://source.chromium.org/chromium/chromium/src/+/main:components/os_crypt/os_crypt_linux.cc;l=74;drc=35be6215ec8f09e50176f36753c68f26c63d1885;bpv=1;bpt=0)
expects the config to be set but the function responsible for setting the
config, [`SetConfig()`](https://source.chromium.org/chromium/chromium/src/+/main:components/os_crypt/os_crypt_linux.cc;l=237;drc=35be6215ec8f09e50176f36753c68f26c63d1885;bpv=1;bpt=0),
is called only after the app is ready inside [`PostCreateMainMessageLoop()`](https://github.com/electron/electron/blob/main/shell/browser/electron_browser_main_parts.cc#L499).
So this changes `IsEncryptionAvailable()` to return `false` when the app
is not ready on Linux and uses that instead of the raw API in other
places like `EncryptString()` and `DecryptString()`.

Fixes: https://github.com/electron/electron/issues/32206
Signed-off-by: Darshan Sen <raisinten@gmail.com>
2022-05-09 09:38:53 -04:00

1.3 KiB

safeStorage

Allows access to simple encryption and decryption of strings for storage on the local machine.

Process: Main

This module protects data stored on disk from being accessed by other applications or users with full disk access.

Note that on Mac, access to the system Keychain is required and these calls can block the current thread to collect user input. The same is true for Linux, if a password management tool is available.

Methods

The safeStorage module has the following methods:

safeStorage.isEncryptionAvailable()

Returns boolean - Whether encryption is available.

On Linux, returns true if the app has emitted the ready event and the secret key is available. On MacOS, returns true if Keychain is available. On Windows, returns true once the app has emitted the ready event.

safeStorage.encryptString(plainText)

  • plainText string

Returns Buffer - An array of bytes representing the encrypted string.

This function will throw an error if encryption fails.

safeStorage.decryptString(encrypted)

  • encrypted Buffer

Returns string - the decrypted string. Decrypts the encrypted buffer obtained with safeStorage.encryptString back into a string.

This function will throw an error if decryption fails.