github.com/aigarnetwork/aigar@v0.0.0-20191115204914-d59a6eb70f8e/signer/core/validation.go (about)

     1  //  Copyright 2018 The go-ethereum Authors
     2  //  Copyright 2019 The go-aigar Authors
     3  //  This file is part of the go-aigar library.
     4  //
     5  //  The go-aigar library is free software: you can redistribute it and/or modify
     6  //  it under the terms of the GNU Lesser General Public License as published by
     7  //  the Free Software Foundation, either version 3 of the License, or
     8  //  (at your option) any later version.
     9  //
    10  //  The go-aigar library is distributed in the hope that it will be useful,
    11  //  but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    13  //  GNU Lesser General Public License for more details.
    14  //
    15  //  You should have received a copy of the GNU Lesser General Public License
    16  //  along with the go-aigar library. If not, see <http://www.gnu.org/licenses/>.
    17  
    18  package core
    19  
    20  import (
    21  	"errors"
    22  	"regexp"
    23  )
    24  
    25  var printable7BitAscii = regexp.MustCompile("^[A-Za-z0-9!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~ ]+$")
    26  
    27  // ValidatePasswordFormat returns an error if the password is too short, or consists of characters
    28  // outside the range of the printable 7bit ascii set
    29  func ValidatePasswordFormat(password string) error {
    30  	if len(password) < 10 {
    31  		return errors.New("password too short (<10 characters)")
    32  	}
    33  	if !printable7BitAscii.MatchString(password) {
    34  		return errors.New("password contains invalid characters - only 7bit printable ascii allowed")
    35  	}
    36  	return nil
    37  }