}
}
}
+
+void aes_cfb8_encrypt(const uint8_t *in, uint8_t *out,
+ size_t length, const AES_KEY *key,
+ uint8_t *iv, int forward)
+{
+ size_t i;
+
+ for (i=0; i < length; i++) {
+ uint8_t tiv[AES_BLOCK_SIZE*2];
+
+ memcpy(tiv, iv, AES_BLOCK_SIZE);
+ AES_encrypt(iv, iv, key);
+ if (!forward) {
+ tiv[AES_BLOCK_SIZE] = in[i];
+ }
+ out[i] = in[i] ^ iv[0];
+ if (forward) {
+ tiv[AES_BLOCK_SIZE] = out[i];
+ }
+ memcpy(iv, tiv+1, AES_BLOCK_SIZE);
+ }
+}