Configuration Users

Purpose

Use this skill for user <username> entries inside local identity store blocks. The Caddyfile syntax is authoritative in caddyfile_identity_store.go; the provisioning behavior is authoritative in the local go-authcrunch source, especially pkg/ids/local/user.go, pkg/ids/local/authenticator.go, and pkg/identity/database.go.

Use configuration-identity-stores for the surrounding store.

Shape

local identity store localdb {
	realm local
	path assets/config/users.json

	user alice {
		name "Alice Example"
		email alice@example.com
		password {env.ALICE_PASSWORD} overwrite
		roles authp/user authp/admin
		api key kid123456789012345678901 {env.ALICE_API_KEY_BCRYPT}
	}
}

kid123456789012345678901 is intentionally 24 characters. For static user API keys, authcrunch treats the Caddyfile key id as the API key prefix and currently requires exactly 24 characters.

Fields

The current Caddyfile parser supports only these subdirectives:

• name <full name> with one or more words; multi-word names are joined with spaces.
• email <address>.
• password <plain_text_or_bcrypt_value> [overwrite].
• roles <role> [<role>...].
• api key <key_id> <bcrypt_value_or_secret_reference>.

Use overwrite when the configured password should replace the existing stored password during provisioning. Passwords may be plaintext or bcrypt:<cost>:<hash> values; authcrunch hashes plaintext passwords before storing them.

Static user blocks are not a full sync mechanism. During local store configuration, authcrunch creates the user when it does not exist. When the user already exists, the static block updates only the password when overwrite is present; it does not overwrite the user's name, email, or roles from the block.

For api key, use a stable 24-character key id and a bcrypt-formatted payload or a placeholder/secret that resolves to one. Do not generate plaintext static API key payload examples.

Do not generate unsupported user subdirectives. In particular, the underlying go-authcrunch/pkg/ids/local.User struct has fields such as AuthChallengeRules and API key Overwrite, but the current caddy-security Caddyfile parser does not expose auth_challenge_rules or API key overwrite syntax inside user blocks.

Authentication challenge rules may still exist in local user records and can be managed outside the Caddyfile, such as with authdbctl or Profile API paths in go-authcrunch. Rules use challenge names like password, totp, u2f, and mfa, plus conditions such as if u2f not available. Treat those as runtime user-database behavior for troubleshooting; do not add auth challenges ... lines to generated local-user Caddyfile blocks until parser support and tests exist.

Secrets

Prefer environment placeholders or secret lookups for passwords and API keys:

password "{env.USERS_ADMIN_SECRET}" overwrite
password "secrets:users/alice:password" overwrite
api key kid123456789012345678901 "secrets:users/alice:api_key"

Make sure API key placeholders and secret lookups resolve to a value in the bcrypt:<cost>:<hash> form.

Use configuration-secrets and configuration-runtime-resolution for secret-backed values.

Review Checklist

Check generated local user entries against these code-backed constraints:

• The entry is inside local identity store <name> { ... }, not an LDAP store.
• The username is present and compatible with the local database policy; the default policy requires length 3-50.
• New users have a password compatible with the local database policy; the default policy requires length 8-128.
• email, when present, is a single valid email address.
• roles has at least one role when used.
• password overwrite has only the literal overwrite as its second argument.
• api key has exactly key, a 24-character key id, and one payload value.
• Static API key payloads are bcrypt-formatted or resolve to bcrypt-formatted values.

Fixtures

Use these examples:

• caddyfile_identity_store.go for accepted Caddyfile subdirectives.
• caddyfile_identity_store_test.go for local store parser coverage.
• testdata/caddyfile_adapt/testcase_security_authentication_portal.Caddyfile.

There is no current authoritative Caddyfile fixture covering static user API keys; verify any generated example against both caddyfile_identity_store.go and the go-authcrunch local identity-store code.