TOTP does not automatically add base32 padding for Amazon secret keys

[derekjc]

I'm trying to "setup TOTP" for my amazon login. It's failing with the error You have entered an invalid secret key. The key must be in Base32 format. Example: JBSWY3DPEHPK3PXP

Expected Behavior

OTP key should be accepted

Current Behavior

OTP key is invalid

Possible fix

Automatically add base32 padding (like oathtool and other authenticator apps). For example, adding ==== to the keys below fixes the issue

Steps to Reproduce

Generate an OTP key using Amazon. Following are examples(no longer in use).
5FT7WWLR3OWA26NWZ6DFCRLM3NGEWVUE7ZYWFMGCWBGJ7K3IEWDA
QGRCOIYTPUPG37U54CDNHJEZU323J7QV63ZMKOMVPT2CCA7ZVWYA

Debug Info

KeePassXC - Version 2.5.0
Revision: 1ab8a9f

Qt 5.12.4
Debugging mode is disabled.

Operating system: Pop!_OS 19.10
CPU architecture: x86_64
Kernel: linux 5.3.0-20-generic

Enabled extensions:

• Auto-Type
• Browser Integration
• SSH Agent
• KeeShare (signed and unsigned sharing)
• YubiKey

Cryptographic libraries:
libgcrypt 1.8.4

[varjolintu]

This is fixed with #3622.