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package crypt
import (
"database/sql/driver"
"fmt"
"github.com/go-crypt/crypt/algorithm"
)
// NewDigest wraps an algorithm.Digest in the convenience layer of the crypt.Digest.
func NewDigest(d algorithm.Digest) (digest *Digest, err error) {
if d == nil {
return nil, fmt.Errorf("can't create crypt.Digest from nil")
}
return &Digest{digest: d}, nil
}
// NewDigestDecode decodes a string into a algorithm.Digest and wraps it in the convenience layer of the crypt.Digest.
func NewDigestDecode(encodedDigest string) (digest *Digest, err error) {
if len(encodedDigest) == 0 {
return nil, fmt.Errorf("can't create crypt.Digest from empty string")
}
var d algorithm.Digest
if d, err = Decode(encodedDigest); err != nil {
return nil, err
}
return &Digest{digest: d}, nil
}
// NewNullDigest wraps an algorithm.Digest in the convenience layer of the crypt.NullDigest.
func NewNullDigest(d algorithm.Digest) (digest *NullDigest) {
return &NullDigest{digest: d}
}
// NewNullDigestDecode decodes a string into a algorithm.Digest and wraps it in the convenience layer of the crypt.NullDigest.
func NewNullDigestDecode(encodedDigest string) (digest *NullDigest, err error) {
if len(encodedDigest) == 0 {
return &NullDigest{}, nil
}
var (
d algorithm.Digest
)
if d, err = Decode(encodedDigest); err != nil {
return nil, err
}
return &NullDigest{digest: d}, nil
}
// Digest is a decorator struct which wraps the algorithm.Digest and adds sql.Scanner/driver.Valuer,
// encoding.TextMarshaler/encoding.TextUnmarshaler, and encoding.BinaryMarshaler/encoding.BinaryUnmarshaler
// implementations.
type Digest struct {
digest algorithm.Digest
}
// Encode decorates the algorithm.Digest Encode function.
func (d *Digest) Encode() string {
return d.digest.Encode()
}
// String decorates the algorithm.Digest String function.
func (d *Digest) String() string {
return d.digest.String()
}
// MatchBytes decorates the algorithm.Digest MatchBytes function.
func (d *Digest) MatchBytes(passwordBytes []byte) (match bool) {
return d.digest.MatchBytes(passwordBytes)
}
// MatchAdvanced decorates the algorithm.Digest MatchAdvanced function.
func (d *Digest) MatchAdvanced(password string) (match bool, err error) {
return d.digest.MatchAdvanced(password)
}
// MatchBytesAdvanced decorates the algorithm.Digest MatchBytesAdvanced function.
func (d *Digest) MatchBytesAdvanced(passwordBytes []byte) (match bool, err error) {
return d.digest.MatchBytesAdvanced(passwordBytes)
}
// Match decorates the algorithm.Digest Match function.
func (d *Digest) Match(password string) (match bool) {
return d.digest.Match(password)
}
// Value implements driver.Valuer.
func (d *Digest) Value() (value driver.Value, err error) {
if d.digest == nil {
return "", nil
}
return d.digest.Encode(), nil
}
// Scan implements sql.Scanner.
func (d *Digest) Scan(src any) (err error) {
switch digest := src.(type) {
case nil:
return fmt.Errorf("invalid type for crypt.Digest: can't scan nil value into crypt.Digest: use crypt.NullDigest instead")
case string:
if d.digest, err = Decode(digest); err != nil {
return err
}
return nil
case byte:
if d.digest, err = Decode(string(digest)); err != nil {
return err
}
return nil
default:
return fmt.Errorf("invalid type for crypt.Digest: can't scan %T into crypt.Digest", digest)
}
}
// MarshalText implements encoding.TextMarshaler.
func (d *Digest) MarshalText() (data []byte, err error) {
if d.digest == nil {
return []byte(""), nil
}
return []byte(d.digest.Encode()), nil
}
// UnmarshalText implements encoding.TextUnmarshaler.
func (d *Digest) UnmarshalText(data []byte) (err error) {
if len(data) == 0 {
return fmt.Errorf("can't unmarhsal empty data to crypt.Digest")
}
var digest algorithm.Digest
if digest, err = Decode(string(data)); err != nil {
return err
}
d.digest = digest
return nil
}
// MarshalBinary implements encoding.BinaryMarshaler.
func (d *Digest) MarshalBinary() (data []byte, err error) {
return d.MarshalText()
}
// UnmarshalBinary implements encoding.BinaryUnmarshaler.
func (d *Digest) UnmarshalBinary(data []byte) (err error) {
return d.UnmarshalText(data)
}
// NullDigest is variation of crypt.Digest which accepts nulls.
type NullDigest struct {
digest algorithm.Digest
}
// Encode decorates the algorithm.Digest Encode function.
func (d *NullDigest) Encode() string {
if d.digest == nil {
return ""
}
return d.digest.Encode()
}
// String decorates the algorithm.Digest String function.
func (d *NullDigest) String() string {
if d.digest == nil {
return ""
}
return d.digest.String()
}
// Match decorates the algorithm.Digest Match function.
func (d *NullDigest) Match(password string) (match bool) {
if d.digest == nil {
return false
}
return d.digest.Match(password)
}
// MatchBytes decorates the algorithm.Digest MatchBytes function.
func (d *NullDigest) MatchBytes(passwordBytes []byte) (match bool) {
if d.digest == nil {
return false
}
return d.digest.MatchBytes(passwordBytes)
}
// MatchAdvanced decorates the algorithm.Digest MatchAdvanced function.
func (d *NullDigest) MatchAdvanced(password string) (match bool, err error) {
if d.digest == nil {
return false, nil
}
return d.digest.MatchAdvanced(password)
}
// MatchBytesAdvanced decorates the algorithm.Digest MatchBytesAdvanced function.
func (d *NullDigest) MatchBytesAdvanced(passwordBytes []byte) (match bool, err error) {
if d.digest == nil {
return false, nil
}
return d.digest.MatchBytesAdvanced(passwordBytes)
}
// Value implements driver.Valuer.
func (d *NullDigest) Value() (value driver.Value, err error) {
if d.digest == nil {
return nil, nil
}
return d.digest.Encode(), nil
}
// Scan implements sql.Scanner.
func (d *NullDigest) Scan(src any) (err error) {
switch digest := src.(type) {
case nil:
d.digest = nil
return nil
case string:
if d.digest, err = Decode(digest); err != nil {
return err
}
return nil
case byte:
if d.digest, err = Decode(string(digest)); err != nil {
return err
}
return nil
default:
return fmt.Errorf("invalid type for crypt.Digest: can't scan %T into crypt.Digest", digest)
}
}
// MarshalText implements encoding.TextMarshaler.
func (d *NullDigest) MarshalText() (data []byte, err error) {
if d.digest == nil {
return nil, nil
}
return []byte(d.digest.Encode()), nil
}
// UnmarshalText implements encoding.TextUnmarshaler.
func (d *NullDigest) UnmarshalText(data []byte) (err error) {
if len(data) == 0 {
d.digest = nil
return nil
}
var digest algorithm.Digest
if digest, err = Decode(string(data)); err != nil {
return err
}
d.digest = digest
return nil
}
// MarshalBinary implements encoding.BinaryMarshaler.
func (d *NullDigest) MarshalBinary() (data []byte, err error) {
return d.MarshalText()
}
// UnmarshalBinary implements encoding.BinaryUnmarshaler.
func (d *NullDigest) UnmarshalBinary(data []byte) (err error) {
return d.UnmarshalText(data)
}
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