chore: vendor

vendor/github.com/theupdateframework/notary/client/witness.go

@@ -0,0 +1,62 @@
+package client
+
+import (
+	"github.com/theupdateframework/notary/client/changelist"
+	"github.com/theupdateframework/notary/tuf"
+	"github.com/theupdateframework/notary/tuf/data"
+)
+
+// Witness creates change objects to witness (i.e. re-sign) the given
+// roles on the next publish. One change is created per role
+func (r *repository) Witness(roles ...data.RoleName) ([]data.RoleName, error) {
+	var err error
+	successful := make([]data.RoleName, 0, len(roles))
+	for _, role := range roles {
+		// scope is role
+		c := changelist.NewTUFChange(
+			changelist.ActionUpdate,
+			role,
+			changelist.TypeWitness,
+			"",
+			nil,
+		)
+		err = r.changelist.Add(c)
+		if err != nil {
+			break
+		}
+		successful = append(successful, role)
+	}
+	return successful, err
+}
+
+func witnessTargets(repo *tuf.Repo, invalid *tuf.Repo, role data.RoleName) error {
+	if r, ok := repo.Targets[role]; ok {
+		// role is already valid, mark for re-signing/updating
+		r.Dirty = true
+		return nil
+	}
+
+	if roleObj, err := repo.GetDelegationRole(role); err == nil && invalid != nil {
+		// A role with a threshold > len(keys) is technically invalid, but we let it build in the builder because
+		// we want to be able to download the role (which may still have targets on it), add more keys, and then
+		// witness the role, thus bringing it back to valid.  However, if no keys have been added before witnessing,
+		// then it is still an invalid role, and can't be witnessed because nothing can bring it back to valid.
+		if roleObj.Threshold > len(roleObj.Keys) {
+			return data.ErrInvalidRole{
+				Role:   role,
+				Reason: "role does not specify enough valid signing keys to meet its required threshold",
+			}
+		}
+		if r, ok := invalid.Targets[role]; ok {
+			// role is recognized but invalid, move to valid data and mark for re-signing
+			repo.Targets[role] = r
+			r.Dirty = true
+			return nil
+		}
+	}
+	// role isn't recognized, even as invalid
+	return data.ErrInvalidRole{
+		Role:   role,
+		Reason: "this role is not known",
+	}
+}