- SILC_GET32_MSB(ctr[0], iv);
- SILC_GET32_MSB(ctr[1], iv + 4);
- SILC_GET32_MSB(ctr[2], iv + 8);
- SILC_GET32_MSB(ctr[3], iv + 12);
-
- i = aes->u.enc.inf.b[2];
- if (!i)
- i = 16;
-
- while (len-- > 0) {
- if (i == 16) {
- if (++ctr[3] == 0)
- if (++ctr[2] == 0)
- if (++ctr[1] == 0)
- ++ctr[0];
-
- SILC_PUT32_MSB(ctr[0], iv);
- SILC_PUT32_MSB(ctr[1], iv + 4);
- SILC_PUT32_MSB(ctr[2], iv + 8);
- SILC_PUT32_MSB(ctr[3], iv + 12);
-
- aes_encrypt(iv, iv, &aes->u.enc);
- i = 0;
- }
- *dst++ = *src++ ^ iv[i++];