- silc_mp_bin2mp(key_data + 4, e_len, &key->e);
-
- memcpy(tmp, key_data + 4 + e_len, 4);
- SILC_GET32_MSB(n_len, tmp);
- if (e_len + n_len > key_len) {
- silc_mp_uninit(&key->e);
- silc_mp_uninit(&key->n);
- return FALSE;
- }
-
- silc_mp_bin2mp(key_data + 4 + e_len + 4, n_len, &key->n);
-
- memcpy(tmp, key_data + 4 + e_len + 4 + n_len, 4);
- SILC_GET32_MSB(d_len, tmp);
- if (e_len + n_len + d_len > key_len) {
- silc_mp_uninit(&key->e);
- silc_mp_uninit(&key->n);
- return FALSE;
- }
-
- silc_mp_bin2mp(key_data + 4 + e_len + 4 + n_len + 4, d_len, &key->d);
-
- key->bits = n_len * 8;
-
- return TRUE;
-}
-
-SILC_PKCS_API_CONTEXT_LEN(rsa)
-{
- return sizeof(RsaKey);
-}
-
-SILC_PKCS_API_ENCRYPT(rsa)
-{
- RsaKey *key = (RsaKey *)context;
- int i, tmplen;
- SilcMPInt mp_tmp;
- SilcMPInt mp_dst;
-
- silc_mp_init(&mp_tmp);
- silc_mp_init(&mp_dst);
- silc_mp_set_ui(&mp_tmp, 0);
- silc_mp_set_ui(&mp_dst, 0);
-
- /* Format the data into MP int */
- for (i = 0; i < src_len; i++) {
- silc_mp_mul_2exp(&mp_tmp, &mp_tmp, 8);
- silc_mp_add_ui(&mp_tmp, &mp_tmp, src[i]);
- }
-
- /* Encrypt */
- rsa_en_de_crypt(&mp_dst, &mp_tmp, &key->e, &key->n);
-
- tmplen = (key->bits + 7) / 8;
-
- /* Format the MP int back into data */
- for (i = tmplen; i > 0; i--) {
- dst[i - 1] = (unsigned char)(silc_mp_get_ui(&mp_dst) & 0xff);
- silc_mp_div_2exp(&mp_dst, &mp_dst, 8);
- }
- *dst_len = tmplen;
-
- silc_mp_uninit(&mp_tmp);
- silc_mp_uninit(&mp_dst);
-
- return TRUE;
-}
-
-SILC_PKCS_API_DECRYPT(rsa)
-{
- RsaKey *key = (RsaKey *)context;
- int i, tmplen;
- SilcMPInt mp_tmp;
- SilcMPInt mp_dst;
-
- silc_mp_init(&mp_tmp);
- silc_mp_init(&mp_dst);
- silc_mp_set_ui(&mp_tmp, 0);
- silc_mp_set_ui(&mp_dst, 0);
-
- /* Format the data into MP int */
- for (i = 0; i < src_len; i++) {
- silc_mp_mul_2exp(&mp_tmp, &mp_tmp, 8);
- silc_mp_add_ui(&mp_tmp, &mp_tmp, src[i]);
- }
-
- /* Decrypt */
- rsa_en_de_crypt(&mp_dst, &mp_tmp, &key->d, &key->n);
-
- tmplen = (key->bits + 7) / 8;
-
- /* Format the MP int back into data */
- for (i = tmplen; i > 0; i--) {
- dst[i - 1] = (unsigned char)(silc_mp_get_ui(&mp_dst) & 0xff);
- silc_mp_div_2exp(&mp_dst, &mp_dst, 8);
- }
- *dst_len = tmplen;
-
- silc_mp_uninit(&mp_tmp);
- silc_mp_uninit(&mp_dst);
-
- return TRUE;
-}
-
-SILC_PKCS_API_SIGN(rsa)
-{
- RsaKey *key = (RsaKey *)context;
- int i, tmplen;
- SilcMPInt mp_tmp;
- SilcMPInt mp_dst;
-
- silc_mp_init(&mp_tmp);
- silc_mp_init(&mp_dst);
- silc_mp_set_ui(&mp_tmp, 0);
- silc_mp_set_ui(&mp_dst, 0);
-
- /* Format the data into MP int */
- for (i = 0; i < src_len; i++) {
- silc_mp_mul_2exp(&mp_tmp, &mp_tmp, 8);
- silc_mp_add_ui(&mp_tmp, &mp_tmp, src[i]);
- }
-
- /* Sign */
- rsa_en_de_crypt(&mp_dst, &mp_tmp, &key->d, &key->n);
-
- tmplen = (key->bits + 7) / 8;