func authenticateRequest(req *messages.Request, role, ident string) bool {
tx, err := db.Begin()
if err != nil {
log.Printf("initiating database transaction failed (%v)", err)
return false
}
// Check key against revocation list.
log.Println("checking key against revocation list")
revoked, err := db.IsKeyRevoked(tx, req.Public)
if err != nil {
log.Printf("failed to check revocation list (%v)", err)
db.Finalise(tx, err)
return false
} else if revoked {
log.Println("request made with revoked key")
db.Finalise(tx, err)
return false
}
// Verify that the secret falls under the purported role.
secRole, err := db.GetSecretRole(tx, ident)
if err != nil {
if err != sql.ErrNoRows {
log.Printf("failed to retrieve secret's role (%v)", err)
db.Finalise(tx, err)
} else {
log.Println("secret doesn't exist")
}
} else if secRole != role {
log.Printf("request made under a role that didn't match the secret's role")
db.Finalise(tx, err)
return false
}
log.Println("getting role signer")
signer, err := db.GetRoleSigner(tx, role)
if err != nil {
log.Printf("failed to retrieve %s signer role (%v)", role, err)
db.Finalise(tx, err)
return false
} else if signer == nil {
log.Printf("request made for non-existent role %s", role)
db.Finalise(tx, err)
return false
}
db.Finalise(tx, err)
return crypto.CheckRequestSignature(req, signer)
}
func updateRole(tx *sql.Tx, req *messages.Request, adm *messages.AdminRequest, role string) ([]byte, error) {
log.Println("request to update role as admin")
log.Println("checking revocation list")
// Check key against revocation list.
revoked, err := db.IsKeyRevoked(tx, req.Public)
if err != nil {
log.Printf("failed to check revocation list (%v)", err)
return messages.NewServerResponse(false, "Not authorised.", nil)
} else if revoked {
log.Println("request attempted with revoked key")
return messages.NewServerResponse(false, "Not authorised.", nil)
}
// Retrieve the admin key, and ensure that the request was properly signed by this key.
adminSigner, err := db.GetRoleSigner(tx, "admin")
if err != nil {
log.Printf("failed to get admin signer (%v)", err)
return messages.NewServerResponse(false, "Not authorised.", nil)
}
// If the role is admin, ensure the key is the admin key.
if role == "admin" {
if !bytes.Equal(adminSigner, req.Public) {
log.Printf("request to change admin role from key that is not admin key")
return messages.NewServerResponse(false, "Not authorised.", nil)
}
}
if !crypto.CheckRequestSignature(req, adminSigner) {
log.Println("admin request made with bad signature")
return messages.NewServerResponse(false, "Not authorised.", nil)
}
roleSigner, err := db.GetRoleSigner(tx, role)
if err != nil {
log.Println("failed to get role signer")
return messages.NewServerResponse(false, "Not authorised.", nil)
} else if roleSigner == nil {
log.Println("role does not exist: create new role", role)
return newRole(tx, req, adm, role)
}
err = db.UpdateRoleSigner(tx, adm.Public, role)
if err != nil {
log.Printf("failed to update role (%v)", err)
return messages.NewServerResponse(false, "Failed to update role.", nil)
}
log.Println("role updated")
return messages.NewServerResponse(true, "Role updated.", nil)
}