static void cmac_process(void *vctx, const uint8_t *block)
{
cf_cmac_stream *ctx = vctx;
uint8_t output[CF_MAXBLOCK];
cf_cbc_encrypt(&ctx->cbc, block, output, 1);
ctx->processed += ctx->cmac.prp->blocksz;
}
static void cmac_process_final(cf_cmac_stream *ctx, const uint8_t *block,
const uint8_t *xor)
{
uint8_t input[CF_MAXBLOCK];
uint8_t output[CF_MAXBLOCK];
xor_bb(input, block, xor, ctx->cmac.prp->blocksz);
cf_cbc_encrypt(&ctx->cbc, input, output, 1);
ctx->processed += ctx->cmac.prp->blocksz;
/* signature is in ctx->cbc.block. */
}
static void test_cbc(void)
{
uint8_t out[16];
const void *iv = "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f";
const void *key = "\x2b\x7e\x15\x16\x28\xae\xd2\xa6\xab\xf7\x15\x88\x09\xcf\x4f\x3c";
const void *inp = "\x6b\xc1\xbe\xe2\x2e\x40\x9f\x96\xe9\x3d\x7e\x11\x73\x93\x17\x2a";
const void *expect = "\x76\x49\xab\xac\x81\x19\xb2\x46\xce\xe9\x8e\x9b\x12\xe9\x19\x7d";
cf_aes_context aes;
cf_aes_init(&aes, key, 16);
cf_cbc cbc;
cf_cbc_init(&cbc, &cf_aes, &aes, iv);
cf_cbc_encrypt(&cbc, inp, out, 1);
TEST_CHECK(memcmp(out, expect, 16) == 0);
uint8_t decrypt[16];
cf_cbc_init(&cbc, &cf_aes, &aes, iv);
cf_cbc_decrypt(&cbc, out, decrypt, 1);
TEST_CHECK(memcmp(decrypt, inp, 16) == 0);
}
