/
hash.go
57 lines (44 loc) · 1.18 KB
/
hash.go
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package hash
import (
"crypto/subtle"
"encoding/hex"
"fmt"
"github.com/MagicalTux/goro/core"
"github.com/MagicalTux/goro/core/phpv"
)
//> func string hash ( string $algo , string $data [, bool $raw_output = FALSE ] )
func fncHash(ctx phpv.Context, args []*phpv.ZVal) (*phpv.ZVal, error) {
var algo phpv.ZString
var data phpv.ZString
var raw *phpv.ZBool
_, err := core.Expand(ctx, args, &algo, &data, &raw)
if err != nil {
return nil, err
}
algN, ok := algos[algo.ToLower()]
if !ok {
return nil, fmt.Errorf("Unknown hashing algorithm: %s", algo)
}
a := algN()
_, err = a.Write([]byte(data))
if err != nil {
return nil, err
}
r := a.Sum(nil)
if raw != nil && *raw {
// return as raw
return phpv.ZString(r).ZVal(), nil
}
// convert to hex
return phpv.ZString(hex.EncodeToString(r)).ZVal(), nil
}
//> func bool hash_equals ( string $known_string , string $user_string )
func fncHashEquals(ctx phpv.Context, args []*phpv.ZVal) (*phpv.ZVal, error) {
var known, user phpv.ZString
_, err := core.Expand(ctx, args, &known, &user)
if err != nil {
return nil, err
}
r := subtle.ConstantTimeCompare([]byte(known), []byte(user))
return phpv.ZBool(r == 1).ZVal(), nil
}