39 lines
1.0 KiB
Go
39 lines
1.0 KiB
Go
package crypt
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import (
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"errors"
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"github.com/ZZMarquis/gm/sm4"
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"github.com/ZZMarquis/gm/util"
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"github.com/ssgo/u"
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)
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func (c *CMCrypt) Encrypt(data []byte, key []byte, iv []byte) (enData []byte, err error) {
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return u.EncryptAesBytes(data, key, iv)
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}
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func (c *CMCrypt) Decrypt(enData []byte, key []byte, iv []byte) (data []byte, err error) {
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return u.DecryptAesBytes(enData, key, iv)
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}
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func (c *GMCrypt) Encrypt(data []byte, key []byte, iv []byte) (enData []byte, err error) {
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return sm4.CBCEncrypt(key[0:16], iv[0:16], util.PKCS5Padding(data, 16))
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}
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func (c *GMCrypt) Decrypt(enData []byte, key []byte, iv []byte) (data []byte, err error) {
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data, err = sm4.CBCDecrypt(key[0:16], iv[0:16], enData)
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if err == nil {
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length := len(data)
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if length > 0 {
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unpadding := int(data[length-1])
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if length-unpadding >= 0 {
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data = util.PKCS5UnPadding(data)
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} else {
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return nil, errors.New("failed to decrypt by gm4")
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}
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} else {
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return nil, errors.New("failed to decrypt by gm4")
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}
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}
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return data, err
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}
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