2 #include <linux/types.h>
3 #include <linux/kernel.h>
12 #include "aes_xcbc_mac.h"
14 int AES_xcbc_mac_set_key(aes_context_mac *ctxm, const u_int8_t *key, int keylen)
18 { 0x01010101, 0x01010101, 0x01010101, 0x01010101 },
19 { 0x02020202, 0x02020202, 0x02020202, 0x02020202 },
20 { 0x03030303, 0x03030303, 0x03030303, 0x03030303 },
22 aes_set_key(&ctxm->ctx_k1, key, keylen, 0);
23 aes_encrypt(&ctxm->ctx_k1, (u_int8_t *) kn[0], (u_int8_t *) kn[0]);
24 aes_encrypt(&ctxm->ctx_k1, (u_int8_t *) kn[1], (u_int8_t *) ctxm->k2);
25 aes_encrypt(&ctxm->ctx_k1, (u_int8_t *) kn[2], (u_int8_t *) ctxm->k3);
26 aes_set_key(&ctxm->ctx_k1, (u_int8_t *) kn[0], 16, 0);
29 static void do_pad_xor(u_int8_t *out, const u_int8_t *in, int len) {
31 for (pos=1; pos <= 16; pos++, in++, out++) {
35 DEBUG(printf("put 0x80 at pos=%d\n", pos));
41 static void xor_block(aes_block res, const aes_block op) {
47 int AES_xcbc_mac_hash(const aes_context_mac *ctxm, const u_int8_t * in, int ilen, u_int8_t hash[16]) {
49 u_int32_t out[4] = { 0, 0, 0, 0 };
50 for (; ilen > 16 ; ilen-=16) {
51 xor_block(out, (const u_int32_t*) &in[0]);
52 aes_encrypt(&ctxm->ctx_k1, in, (u_int8_t *)&out[0]);
55 do_pad_xor((u_int8_t *)&out, in, ilen);
57 DEBUG(printf("using k3\n"));
58 xor_block(out, ctxm->k3);
62 DEBUG(printf("using k2\n"));
63 xor_block(out, ctxm->k2);
65 aes_encrypt(&ctxm->ctx_k1, (u_int8_t *)out, hash);