56 lines
1.4 KiB
Go
56 lines
1.4 KiB
Go
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package libPassword
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import "golang.org/x/crypto/pbkdf2"
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import "hash"
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import "strconv"
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import "encoding/base64"
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import "crypto/sha1"
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import "crypto/sha256"
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import "crypto/sha512"
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import "crypto/rand"
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import "fmt"
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import "strings"
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const (
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salt_length = 8
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hesh_length = 20
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interations = 10000
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hashfunc string = "sha256"
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)
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var hashlib = map[string] func()hash.Hash{
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"sha1":sha1.New,
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"sha256":sha256.New,
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"sha512":sha512.New,
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}
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func Validate(hash,password string)(output,replace bool){
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parts := strings.Split(hash,"$")
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if len(parts) == 3 {
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return false,false
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}
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cur_iter,err := strconv.Atoi(parts[1])
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if err != nil {
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return false,false
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}
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hashfunc_c := strings.Split(parts[0],"_")[1]
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replace = (hashfunc_c!=hashfunc)
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dk := pbkdf2.Key([]byte(password), []byte(parts[2]), cur_iter, len(parts[3])-8, hashlib[hashfunc_c])
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x := fmt.Sprintf("pbkdf2_%s$%s$%s$%s",hashfunc_c,parts[1],parts[2],base64.StdEncoding.EncodeToString(dk))
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output = (x==hash)
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return
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}
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func GenerateRandomString(n int) (string, error) {
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b := make([]byte, n)
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_, err := rand.Read(b)
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if err != nil {
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return "", err
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}
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return base64.URLEncoding.EncodeToString(b), nil
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}
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func NewHesh(password string)string{
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salt,_ := GenerateRandomString(salt_length)
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dk := pbkdf2.Key([]byte(password), []byte(salt), interations, hesh_length, hashlib[hashfunc])
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return fmt.Sprintf("pbkdf2_%s$%d$%s$%s",hashfunc,interations,salt,base64.StdEncoding.EncodeToString(dk))
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}
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