func (key *pKey) RSASize() (int, error) {
rsa := (*C.RSA)(C.EVP_PKEY_get1_RSA(key.key))
if rsa == nil {
return 0, errors.New("failed getting rsa key")
}
defer C.RSA_free(rsa)
return int(C.RSA_size(rsa)), nil
}
func (key *pKey) PrivateSign(dst []byte, src []byte, padding int) (int, error) {
rsa := (*C.RSA)(C.EVP_PKEY_get1_RSA(key.key))
if rsa == nil {
return 0, errors.New("failed getting rsa key")
}
defer C.RSA_free(rsa)
outlen := C.RSA_private_encrypt(C.int(len(src)), (*C.uchar)(unsafe.Pointer(&src[0])), (*C.uchar)(unsafe.Pointer(&dst[0])), rsa, C.int(padding))
if outlen > 0 {
return int(outlen), nil
} else {
return int(outlen), errors.New("unable to decrypt")
}
}
func (key *pKey) MarshalPKIXPublicKeyDER() (der_block []byte,
err error) {
bio := C.BIO_new(C.BIO_s_mem())
if bio == nil {
return nil, errors.New("failed to allocate memory BIO")
}
defer C.BIO_free(bio)
rsa := (*C.RSA)(C.EVP_PKEY_get1_RSA(key.key))
if rsa == nil {
return nil, errors.New("failed getting rsa key")
}
defer C.RSA_free(rsa)
if int(C.i2d_RSA_PUBKEY_bio(bio, rsa)) != 1 {
return nil, errors.New("failed dumping public key der")
}
return ioutil.ReadAll(asAnyBio(bio))
}
func (key *pKey) MarshalPKCS1PrivateKeyPEM() (pem_block []byte,
err error) {
bio := C.BIO_new(C.BIO_s_mem())
if bio == nil {
return nil, errors.New("failed to allocate memory BIO")
}
defer C.BIO_free(bio)
rsa := (*C.RSA)(C.EVP_PKEY_get1_RSA(key.key))
if rsa == nil {
return nil, errors.New("failed getting rsa key")
}
defer C.RSA_free(rsa)
if int(C.PEM_write_bio_RSAPrivateKey(bio, rsa, nil, nil, C.int(0), nil,
nil)) != 1 {
return nil, errors.New("failed dumping private key")
}
return ioutil.ReadAll(asAnyBio(bio))
}