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/*
* Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/*
* CMAC low level APIs are deprecated for public use, but still ok for internal
* use.
*/
#include "internal/deprecated.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "internal/nelem.h"
#include <openssl/cmac.h>
#include <openssl/aes.h>
#include <openssl/evp.h>
#include "testutil.h"
static const char xtskey[32] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,
0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f
};
static struct test_st {
const char key[32];
int key_len;
const unsigned char data[64];
int data_len;
const char *mac;
} test[3] = {
{
{
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a,
0x0b, 0x0c, 0x0d, 0x0e, 0x0f
},
16,
"My test data",
12,
"29cec977c48f63c200bd5c4a6881b224"
},
{
{
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a,
0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15,
0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f
},
32,
"My test data",
12,
"db6493aa04e4761f473b2b453c031c9a"
},
{
{
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a,
0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15,
0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f
},
32,
"My test data again",
18,
"65c11c75ecf590badd0a5e56cbb8af60"
},
};
static char *pt(unsigned char *md, unsigned int len);
static int test_cmac_bad(void)
{
CMAC_CTX *ctx = NULL;
int ret = 0;
ctx = CMAC_CTX_new();
if (!TEST_ptr(ctx)
|| !TEST_false(CMAC_Init(ctx, NULL, 0, NULL, NULL))
|| !TEST_false(CMAC_Update(ctx, test[0].data, test[0].data_len))
/* Should be able to pass cipher first, and then key */
|| !TEST_true(CMAC_Init(ctx, NULL, 0, EVP_aes_128_cbc(), NULL))
/* Must have a key */
|| !TEST_false(CMAC_Update(ctx, test[0].data, test[0].data_len))
/* Now supply the key */
|| !TEST_true(CMAC_Init(ctx, test[0].key, test[0].key_len, NULL, NULL))
/* Update should now work */
|| !TEST_true(CMAC_Update(ctx, test[0].data, test[0].data_len))
/* XTS is not a suitable cipher to use */
|| !TEST_false(CMAC_Init(ctx, xtskey, sizeof(xtskey), EVP_aes_128_xts(),
NULL))
|| !TEST_false(CMAC_Update(ctx, test[0].data, test[0].data_len)))
goto err;
ret = 1;
err:
CMAC_CTX_free(ctx);
return ret;
}
static int test_cmac_run(void)
{
char *p;
CMAC_CTX *ctx = NULL;
unsigned char buf[AES_BLOCK_SIZE];
size_t len;
int ret = 0;
ctx = CMAC_CTX_new();
if (!TEST_true(CMAC_Init(ctx, test[0].key, test[0].key_len,
EVP_aes_128_cbc(), NULL))
|| !TEST_true(CMAC_Update(ctx, test[0].data, test[0].data_len))
|| !TEST_true(CMAC_Final(ctx, buf, &len)))
goto err;
p = pt(buf, len);
if (!TEST_str_eq(p, test[0].mac))
goto err;
if (!TEST_true(CMAC_Init(ctx, test[1].key, test[1].key_len,
EVP_aes_256_cbc(), NULL))
|| !TEST_true(CMAC_Update(ctx, test[1].data, test[1].data_len))
|| !TEST_true(CMAC_Final(ctx, buf, &len)))
goto err;
p = pt(buf, len);
if (!TEST_str_eq(p, test[1].mac))
goto err;
if (!TEST_true(CMAC_Init(ctx, test[2].key, test[2].key_len, NULL, NULL))
|| !TEST_true(CMAC_Update(ctx, test[2].data, test[2].data_len))
|| !TEST_true(CMAC_Final(ctx, buf, &len)))
goto err;
p = pt(buf, len);
if (!TEST_str_eq(p, test[2].mac))
goto err;
/* Test reusing a key */
if (!TEST_true(CMAC_Init(ctx, NULL, 0, NULL, NULL))
|| !TEST_true(CMAC_Update(ctx, test[2].data, test[2].data_len))
|| !TEST_true(CMAC_Final(ctx, buf, &len)))
goto err;
p = pt(buf, len);
if (!TEST_str_eq(p, test[2].mac))
goto err;
/* Test setting the cipher and key separately */
if (!TEST_true(CMAC_Init(ctx, NULL, 0, EVP_aes_256_cbc(), NULL))
|| !TEST_true(CMAC_Init(ctx, test[2].key, test[2].key_len, NULL, NULL))
|| !TEST_true(CMAC_Update(ctx, test[2].data, test[2].data_len))
|| !TEST_true(CMAC_Final(ctx, buf, &len)))
goto err;
p = pt(buf, len);
if (!TEST_str_eq(p, test[2].mac))
goto err;
ret = 1;
err:
CMAC_CTX_free(ctx);
return ret;
}
static int test_cmac_copy(void)
{
char *p;
CMAC_CTX *ctx = NULL, *ctx2 = NULL;
unsigned char buf[AES_BLOCK_SIZE];
size_t len;
int ret = 0;
ctx = CMAC_CTX_new();
ctx2 = CMAC_CTX_new();
if (!TEST_ptr(ctx) || !TEST_ptr(ctx2))
goto err;
if (!TEST_true(CMAC_Init(ctx, test[0].key, test[0].key_len,
EVP_aes_128_cbc(), NULL))
|| !TEST_true(CMAC_Update(ctx, test[0].data, test[0].data_len))
|| !TEST_true(CMAC_CTX_copy(ctx2, ctx))
|| !TEST_true(CMAC_Final(ctx2, buf, &len)))
goto err;
p = pt(buf, len);
if (!TEST_str_eq(p, test[0].mac))
goto err;
ret = 1;
err:
CMAC_CTX_free(ctx2);
CMAC_CTX_free(ctx);
return ret;
}
static char *pt(unsigned char *md, unsigned int len)
{
unsigned int i;
static char buf[80];
for (i = 0; i < len; i++)
sprintf(&(buf[i * 2]), "%02x", md[i]);
return buf;
}
int setup_tests(void)
{
ADD_TEST(test_cmac_bad);
ADD_TEST(test_cmac_run);
ADD_TEST(test_cmac_copy);
return 1;
}
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