Managing Passwords

Duplicacy will attempt to retrieve in three ways the storage password and the storage-specific access tokens/keys.

• If a secret vault service is available, Duplicacy will store passwords/keys entered by the user in such a secret vault and later retrieve them when needed. On Mac OS X it is Keychain, and on Linux it is gnome-keyring. On Windows the passwords/keys are encrypted and decrypted by the Data Protection API, and encrypted passwords/keys are stored in the file .duplicacy/keyring. However, if the -no-save-password option is specified for the storage, then Duplicacy will not save passwords this way.
• If an environment variable for a password is provided, Duplicacy will always take it. The table below shows the name of the environment variable for each kind of password. Note that if the storage is not the default one, the storage name will be included in the name of the environment variable (in uppercase). For example, if your storage name is b2, then the environment variable should be named DUPLICACY_B2_PASSWORD.
• If a matching key and its value are saved to the preference file (.duplicacy/preferences) by the set command, the value will be used as the password. The last column in the table below lists the name of the preference key for each type of password.

password type	environment variable (default storage)	environment variable (non-default storage in uppercase)	key in preferences
storage password	DUPLICACY_PASSWORD	DUPLICACY_<STORAGENAME>_PASSWORD	password
sftp password	DUPLICACY_SSH_PASSWORD	DUPLICACY_<STORAGENAME>_SSH_PASSWORD	ssh_password
sftp key file	DUPLICACY_SSH_KEY_FILE	DUPLICACY_<STORAGENAME>_SSH_KEY_FILE	ssh_key_file
Dropbox Token	DUPLICACY_DROPBOX_TOKEN	DUPLICACY_<STORAGENAME>>_DROPBOX_TOKEN	dropbox_token
S3 Access ID	DUPLICACY_S3_ID	DUPLICACY_<STORAGENAME>_S3_ID	s3_id
S3 Secret Key	DUPLICACY_S3_SECRET	DUPLICACY_<STORAGENAME>_S3_SECRET	s3_secret
BackBlaze Account ID	DUPLICACY_B2_ID	DUPLICACY_<STORAGENAME>_B2_ID	b2_id
Backblaze Application Key	DUPLICACY_B2_KEY	DUPLICACY_<STORAGENAME>_B2_KEY	b2_key
Azure Access Key	DUPLICACY_AZURE_KEY	DUPLICACY_<STORAGENAME>_AZURE_KEY	azure_key
Google Drive Token File	DUPLICACY_GCD_TOKEN	DUPLICACY_<STORAGENAME>_GCD_TOKEN	gcd_token
Google Cloud Storage Token File	DUPLICACY_GCS_TOKEN	DUPLICACY_<STORAGENAME>_GCS_TOKEN	gcs_token
Microsoft OneDrive Token File	DUPLICACY_ONE_TOKEN	DUPLICACY_<STORAGENAME>_ONE_TOKEN	one_token
Hubic Token File	DUPLICACY_HUBIC_TOKEN	DUPLICACY_<STORAGENAME>_HUBIC_TOKEN	hubic_token

Note that the passwords stored in the environment variable and the preference need to be in plaintext and thus are insecure and should be avoided whenever possible.

Saving credentials to Duplicacy config file

Use one of the above environment variables, but lowercase and remove duplicacy_

Example: duplicacy set -key b2_id -value 6fdd6eeeefff or: duplicacy set -key mybackupstorage_b2_id -value 6fdd6eeeefff or: duplicacy set -key b2_id -value "passphrase with spaces"