forked from TrueCloudLab/certificates
88 lines
2 KiB
Go
88 lines
2 KiB
Go
package nosql
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import (
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"context"
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"encoding/json"
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"time"
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"github.com/pkg/errors"
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nosqlDB "github.com/smallstep/nosql/database"
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"go.step.sm/crypto/randutil"
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)
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var (
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adminsTable = []byte("admins")
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provisionersTable = []byte("provisioners")
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)
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// DB is a struct that implements the AdminDB interface.
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type DB struct {
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db nosqlDB.DB
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authorityID string
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}
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// New configures and returns a new Authority DB backend implemented using a nosql DB.
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func New(db nosqlDB.DB, authorityID string) (*DB, error) {
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tables := [][]byte{adminsTable, provisionersTable}
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for _, b := range tables {
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if err := db.CreateTable(b); err != nil {
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return nil, errors.Wrapf(err, "error creating table %s",
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string(b))
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}
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}
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return &DB{db, authorityID}, nil
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}
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// save writes the new data to the database, overwriting the old data if it
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// existed.
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func (db *DB) save(ctx context.Context, id string, nu interface{}, old interface{}, typ string, table []byte) error {
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var (
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err error
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newB []byte
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)
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if nu == nil {
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newB = nil
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} else {
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newB, err = json.Marshal(nu)
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if err != nil {
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return errors.Wrapf(err, "error marshaling authority type: %s, value: %v", typ, nu)
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}
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}
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var oldB []byte
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if old == nil {
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oldB = nil
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} else {
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oldB, err = json.Marshal(old)
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if err != nil {
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return errors.Wrapf(err, "error marshaling admin type: %s, value: %v", typ, old)
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}
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}
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_, swapped, err := db.db.CmpAndSwap(table, []byte(id), oldB, newB)
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switch {
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case err != nil:
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return errors.Wrapf(err, "error saving authority %s", typ)
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case !swapped:
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return errors.Errorf("error saving authority %s; changed since last read", typ)
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default:
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return nil
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}
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}
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func randID() (val string, err error) {
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val, err = randutil.UUIDv4()
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if err != nil {
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return "", errors.Wrap(err, "error generating random alphanumeric ID")
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}
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return val, nil
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}
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// Clock that returns time in UTC rounded to seconds.
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type Clock struct{}
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// Now returns the UTC time rounded to seconds.
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func (c *Clock) Now() time.Time {
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return time.Now().UTC().Truncate(time.Second)
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}
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var clock = new(Clock)
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