mindoc/utils/password.go

139 lines
2.9 KiB
Go

package utils
import (
"crypto/md5"
"crypto/rand"
"crypto/sha256"
"crypto/sha512"
"encoding/base64"
"encoding/hex"
"io"
mt "math/rand"
"strconv"
"strings"
)
const (
saltSize = 16
delmiter = "$"
stretching_password = 500
salt_local_secret = "ahfw*&TGdsfnbi*^Wt"
)
//加密密码
func PasswordHash(pass string) (string, error) {
salt_secret, err := salt_secret()
if err != nil {
return "", err
}
salt, err := salt(salt_local_secret + salt_secret)
if err != nil {
return "", err
}
interation := randInt(1, 20)
hash, err := hash(pass, salt_secret, salt, int64(interation))
if err != nil {
return "", err
}
interation_string := strconv.Itoa(interation)
password := salt_secret + delmiter + interation_string + delmiter + hash + delmiter + salt
return password, nil
}
//校验密码是否有效
func PasswordVerify(hashing string, pass string) (bool, error) {
data := trim_salt_hash(hashing)
interation, _ := strconv.ParseInt(data["interation_string"], 10, 64)
has, err := hash(pass, data["salt_secret"], data["salt"], int64(interation))
if err != nil {
return false, err
}
if (data["salt_secret"] + delmiter + data["interation_string"] + delmiter + has + delmiter + data["salt"]) == hashing {
return true, nil
} else {
return false, nil
}
}
func hash(pass string, salt_secret string, salt string, interation int64) (string, error) {
var pass_salt string = salt_secret + pass + salt + salt_secret + pass + salt + pass + pass + salt
var i int
hash_pass := salt_local_secret
hash_start := sha512.New()
hash_center := sha256.New()
hash_output := sha256.New224()
i = 0
for i <= stretching_password {
i = i + 1
hash_start.Write([]byte(pass_salt + hash_pass))
hash_pass = hex.EncodeToString(hash_start.Sum(nil))
}
i = 0
for int64(i) <= interation {
i = i + 1
hash_pass = hash_pass + hash_pass
}
i = 0
for i <= stretching_password {
i = i + 1
hash_center.Write([]byte(hash_pass + salt_secret))
hash_pass = hex.EncodeToString(hash_center.Sum(nil))
}
hash_output.Write([]byte(hash_pass + salt_local_secret))
hash_pass = hex.EncodeToString(hash_output.Sum(nil))
return hash_pass, nil
}
func trim_salt_hash(hash string) map[string]string {
str := strings.Split(hash, delmiter)
return map[string]string{
"salt_secret": str[0],
"interation_string": str[1],
"hash": str[2],
"salt": str[3],
}
}
func salt(secret string) (string, error) {
buf := make([]byte, saltSize, saltSize+md5.Size)
_, err := io.ReadFull(rand.Reader, buf)
if err != nil {
return "", err
}
hash := md5.New()
hash.Write(buf)
hash.Write([]byte(secret))
return hex.EncodeToString(hash.Sum(buf)), nil
}
func salt_secret() (string, error) {
rb := make([]byte, randInt(10, 100))
_, err := rand.Read(rb)
if err != nil {
return "", err
}
return base64.URLEncoding.EncodeToString(rb), nil
}
func randInt(min int, max int) int {
return min + mt.Intn(max-min)
}