// DecodeHash expects a hash created from this package, and parses it to return the params used to
// create it, as well as the salt and key (password hash).
DecodeHash expects a hash created from this package, and parses it to return the params used to
create it, as well as the salt and key (password hash).
// DecodeHash expects a hash created from this package and parses it to return the params used to // create it as well as the salt and key ( password hash ) .
func DecodeHash(hash string) (params *Params, salt, key []byte, err error) {
	vals := strings.Split(hash, "$")
	if len(vals) != 6 {
		return nil, nil, nil, ErrInvalidHash
	}
	var version int
	_, err = fmt.Sscanf(vals[2], "v=%d", &version)
	if err != nil {
		return nil, nil, nil, err
	}
	if version != argon2.Version {
		return nil, nil, nil, ErrIncompatibleVersion
	}
	params = &Params{}
	_, err = fmt.Sscanf(vals[3], "m=%d,t=%d,p=%d", &params.Memory, &params.Iterations, &params.Parallelism)
	if err != nil {
		return nil, nil, nil, err
	}
	salt, err = base64.RawStdEncoding.Strict().DecodeString(vals[4])
	if err != nil {
		return nil, nil, nil, err
	}
	params.SaltLength = uint32(len(salt))
	key, err = base64.RawStdEncoding.Strict().DecodeString(vals[5])
	if err != nil {
		return nil, nil, nil, err
	}
	params.KeyLength = uint32(len(key))
	return params, salt, key, nil
}
func DecodeHash ( hash string ) ( params * Params , salt , key [ ] byte , err error ) { vals := strings . Split ( hash , " " ) if len ( vals ) != 6 { return nil , nil , nil , ErrInvalidHash } var version int _ , err = fmt . Sscanf ( vals [ 2 ] , " " , & version ) if err != nil { return nil , nil , nil , err } if version != argon2 . Version { return nil , nil , nil , ErrIncompatibleVersion } params = & Params { } _ , err = fmt . Sscanf ( vals [ 3 ] , " " , & params . Memory , & params . Iterations , & params . Parallelism ) if err != nil { return nil , nil , nil , err } salt , err = base64 . RawStdEncoding . Strict ( ) . DecodeString ( vals [ 4 ] ) if err != nil { return nil , nil , nil , err } params . SaltLength = uint32 ( len ( salt ) ) key , err = base64 . RawStdEncoding . Strict ( ) . DecodeString ( vals [ 5 ] ) if err != nil { return nil , nil , nil , err } params . KeyLength = uint32 ( len ( key ) ) return params , salt , key , nil }
DecodeHash expects a hash created from this package, and parses it to return the params used to
create it, as well as the salt and key (password hash).
DecodeHash expects a hash created from this package and parses it to return the params used to create it as well as the salt and key ( password hash ) .