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init.go
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init.go
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package hash
import (
"crypto/hmac"
"errors"
"fmt"
gohash "hash"
"github.com/MagicalTux/goro/core"
"github.com/MagicalTux/goro/core/phpobj"
"github.com/MagicalTux/goro/core/phpv"
)
//> const HASH_HMAC: phpv.ZInt(1)
//> func HashContext hash_init ( string $algo [, int $options = 0 [, string $key = NULL ]] )
func fncHashInit(ctx phpv.Context, args []*phpv.ZVal) (*phpv.ZVal, error) {
var algo phpv.ZString
var opt *phpv.ZInt
var key *phpv.ZString
_, err := core.Expand(ctx, args, &algo, &opt, &key)
if err != nil {
return nil, err
}
algN, ok := algos[algo.ToLower()]
if !ok {
return nil, fmt.Errorf("Unknown hashing algorithm: %s", algo)
}
var h gohash.Hash
if opt != nil && *opt == 1 {
// HMAC
var k []byte
if key == nil {
return nil, errors.New("HMAC requested without a key") // TODO make this a warning
} else {
k = []byte(*key)
}
h = hmac.New(algN, k)
} else {
h = algN()
}
z, err := phpobj.NewZObjectOpaque(ctx, HashContext, h)
if err != nil {
return nil, err
}
return z.ZVal(), nil
}