Google Authenticator migration decoder

Convert Google Authenticator otpauth-migration://offline?data=... transfer links to plain otpauth links.

Usage

• Navigate to ⋮ → Transfer accounts → Export accounts.
• Extract migration link from QR-code using your preferred software.
• Pass link to otpauth tool.

Flags

  -cache string
    	cache file (default "migration.bin")
  -eval
    	evaluate otps
  -http string
    	serve http (e.g. localhost:6060)
  -info
    	display batch info
  -link string
    	migration link (required)
  -qr
    	generate QR-codes (optauth://)
  -rev
    	reverse QR-code (otpauth-migration://)

Example

NOTE: at least Go 1.16 required, or use latest binary release.

go get github.com/dim13/otpauth
~/go/bin/otpauth -link "otpauth-migration://offline?data=CjEKCkhlbGxvId6tvu8SGEV4YW1wbGU6YWxpY2VAZ29vZ2xlLmNvbRoHRXhhbXBsZTAC"

Will output:

otpauth://totp/Example:[email protected]?issuer=Example&secret=JBSWY3DPEHPK3PXP

QR-Codes

~/go/bin/otpauth -qr -link "otpauth-migration://offline?data=CjEKCkhlbGxvId6tvu8SGEV4YW1wbGU6YWxpY2VAZ29vZ2xlLmNvbRoHRXhhbXBsZTAC"
# view and scan *.png in current working directory

Will generate:

Serve http

~/go/bin/otpauth -http=localhost:6060 -link "otpauth-migration://offline?data=CjEKCkhlbGxvId6tvu8SGEV4YW1wbGU6YWxpY2VAZ29vZ2xlLmNvbRoHRXhhbXBsZTAC"

Navigate to http://localhost:6060/