cbc_dec
cbc_dec (out, in, iv, len2);
cbc_dec (tmp, output, ivec, len);
cbc_dec (out, in, iv, len2);
cbc_dec (tmp, test_case[testno].output, ivec, len);
cbc_dec(key, block, 1, iv);
cbc_dec(key, iov_cursor_ptr(&cursor), ncontig, iv);
cbc_dec(key, block, 1, iv);
cbc_dec(key, blockN2, 1, dummy_iv);
cbc_dec(key, blockN1, 1, iv);
cbc_dec(key, block, 1, iv);
cbc_dec(key, iov_cursor_ptr(&cursor), ncontig, iv);
cbc_dec(key, block, 1, iv);
cbc_dec(key, blockN2, 1, dummy_iv);
cbc_dec(key, blockN1, 1, iv);