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| stage | group | info | type |
|---|---|---|---|
| none | unassigned | To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments | reference |
Password Storage
GitLab stores user passwords in a hashed format, to prevent passwords from being visible.
GitLab uses the Devise authentication library, which handles the hashing of user passwords. Password hashes are created with the following attributes:
- Hashing: the
bcrypthashing function is used to generate the hash of the provided password. This is a strong, industry-standard cryptographic hashing function. - Stretching: Password hashes are stretched to harden against brute-force attacks. GitLab uses a stretching factor of 10 by default.
- Salting: A cryptographic salt is added to each password to harden against pre-computed hash and dictionary attacks. Each salt is randomly generated for each password, so that no two passwords share a salt, to further increase security.