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## gitsign initialize
Initializes Sigstore root to retrieve trusted certificate and key targets for verification.
### Synopsis
Initializes Sigstore root to retrieve trusted certificate and key targets for verification.
The following options are used by default:
- The current trusted Sigstore TUF root is embedded inside gitsign at the time of release.
- Sigstore remote TUF repository is pulled from the CDN mirror at tuf-repo-cdn.sigstore.dev.
To provide an out-of-band trusted initial root.json, use the -root flag with a file or URL reference.
This will enable you to point gitsign to a separate TUF root.
Any updated TUF repository will be written to $HOME/.sigstore/root/.
Trusted keys and certificate used in gitsign verification (e.g. verifying Fulcio issued certificates
with Fulcio root CA) are pulled form the trusted metadata.
```
gitsign initialize [flags]
```
### Examples
```
gitsign initialize -mirror <url> -out <file>
# initialize root with distributed root keys, default mirror, and default out path.
gitsign initialize
# initialize with an out-of-band root key file, using the default mirror.
gitsign initialize -root <url>
# initialize with an out-of-band root key file and custom repository mirror.
gitsign initialize -mirror <url> -root <url>
```
### Options
```
-h, --help help for initialize
--mirror string GCS bucket to a Sigstore TUF repository, or HTTP(S) base URL, or file:/// for local filestore remote (air-gap) (default "https://tuf-repo-cdn.sigstore.dev")
--root string path to trusted initial root. defaults to embedded root
```
### SEE ALSO
* [gitsign](gitsign.md) - Keyless Git signing with Sigstore!
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