/
pbkdf2.go
48 lines (40 loc) · 1.16 KB
/
pbkdf2.go
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package hash
import (
"encoding/hex"
"fmt"
"github.com/MagicalTux/goro/core"
"github.com/MagicalTux/goro/core/phpv"
"golang.org/x/crypto/pbkdf2"
)
//> func string hash_pbkdf2 ( string $algo , string $password , string $salt , int $iterations [, int $length = 0 [, bool $raw_output = FALSE ]] )
func fncHashPbkdf2(ctx phpv.Context, args []*phpv.ZVal) (*phpv.ZVal, error) {
var algo phpv.ZString
var password phpv.ZString
var salt phpv.ZString
var iter phpv.ZInt
var l *phpv.ZInt
var raw *phpv.ZBool
_, err := core.Expand(ctx, args, &algo, &password, &salt, &iter, &l, &raw)
if err != nil {
return nil, err
}
algN, ok := algos[algo.ToLower()]
if !ok {
return nil, fmt.Errorf("Unknown hashing algorithm: %s", algo)
}
// not sure about key length, let's go with 128 by default?
length := 128
if l != nil {
length = int(*l)
if length <= 0 {
length = 128
}
}
r := pbkdf2.Key([]byte(password), []byte(salt), int(iter), length, algN)
if raw != nil && *raw {
// return as raw
return phpv.ZString(r).ZVal(), nil
}
// convert to hex, cut to "length" because PHP implementation is weird
return phpv.ZString(hex.EncodeToString(r))[:length].ZVal(), nil
}