func (c *cipher) Crypt(source, target []byte) ([]byte, error) {
if len(source) > cap(target) {
return nil, errors.New("aes: target must be at least as long as the source")
}
var outl C.int
cgolock.Lock()
C.EVP_EncryptUpdate(&c.evp, (*C.uchar)(&target[0]), &outl, (*C.uchar)(&source[0]), C.int(len(source)))
cgolock.Unlock()
return target[:int(outl)], nil
}
func New(key, iv []byte) Cipher {
c := &cipher{}
cgolock.Lock()
defer cgolock.Unlock()
C.EVP_CIPHER_CTX_init(&c.evp)
runtime.SetFinalizer(c, func(c *cipher) {
C.EVP_CIPHER_CTX_cleanup(&c.evp)
})
C.EVP_EncryptInit_ex(&c.evp, C.EVP_aes_128_ctr(), nil, (*C.uchar)(&key[0]), (*C.uchar)(&iv[0]))
return c
}