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       this list of conditions and the following disclaimer.
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#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include <intel-ipsec-mb.h>
#include "utils.h"

#define PAD_SIZE 16
#define BUF_SIZE 32

int
null_test(struct IMB_MGR *mb_mgr);

static void
test_null_hash(struct IMB_MGR *mb_mgr, struct test_suite_context *ctx,
               IMB_CIPHER_DIRECTION cipher_dir, IMB_CHAIN_ORDER chain_order)
{
        DECLARE_ALIGNED(uint8_t cipher_key[16], 16) = { 0 };
        DECLARE_ALIGNED(uint32_t expkey[4 * 15], 16);
        DECLARE_ALIGNED(uint32_t dust[4 * 15], 16);
        DECLARE_ALIGNED(uint8_t iv[16], 16);
        DECLARE_ALIGNED(uint8_t digest[16], 16) = { 0 };
        DECLARE_ALIGNED(uint8_t all_zeros[16], 16) = { 0 };
        struct IMB_JOB *job;
        uint8_t padding[PAD_SIZE];
        uint8_t target[BUF_SIZE + 2 * PAD_SIZE];
        uint8_t in_text[BUF_SIZE];
        int ret = -1;

        memset(target, -1, sizeof(target));
        memset(padding, -1, sizeof(padding));

        IMB_AES_KEYEXP_128(mb_mgr, cipher_key, expkey, dust);
        while (IMB_FLUSH_JOB(mb_mgr) != NULL)
                ;

        job = IMB_GET_NEXT_JOB(mb_mgr);
        job->cipher_direction = cipher_dir;
        job->chain_order = chain_order;
        job->dst = target + PAD_SIZE;
        job->src = in_text;
        job->cipher_mode = IMB_CIPHER_CNTR;
        job->enc_keys = expkey;
        job->dec_keys = expkey;
        job->key_len_in_bytes = 16;
        job->iv = iv;
        job->iv_len_in_bytes = 16;
        job->cipher_start_src_offset_in_bytes = 0;
        job->msg_len_to_cipher_in_bytes = BUF_SIZE;

        job->hash_alg = IMB_AUTH_NULL;
        job->auth_tag_output = digest;
        job->auth_tag_output_len_in_bytes = 0;

        job = IMB_SUBMIT_JOB(mb_mgr);
        if (!job)
                job = IMB_FLUSH_JOB(mb_mgr);

        if (!job) {
                printf("%d Unexpected null return from submit/flush_job\n", __LINE__);
                goto end;
        }

        /* Check that padding has not been changed */
        if (memcmp(padding, target, PAD_SIZE)) {
                printf("overwrite head\n");
                hexdump(stderr, "Target", target, BUF_SIZE + PAD_SIZE * 2);
                goto end;
        }
        if (memcmp(padding, target + PAD_SIZE + BUF_SIZE, PAD_SIZE)) {
                printf("overwrite tail\n");
                hexdump(stderr, "Target", target, BUF_SIZE + PAD_SIZE * 2);
                goto end;
        }
        /* Check that authentication tag has not been modified */
        if (memcmp(digest, all_zeros, 16) != 0) {
                printf("overwrite auth tag\n");
                hexdump(stderr, "Auth tag", digest, 16);
                goto end;
        }

        ret = 0;
        while (IMB_FLUSH_JOB(mb_mgr) != NULL)
                ;
end:
        if (ret == 0)
                test_suite_update(ctx, 1, 0);
        else
                test_suite_update(ctx, 0, 1);
}

static void
test_null_cipher(struct IMB_MGR *mb_mgr, struct test_suite_context *ctx,
                 IMB_CIPHER_DIRECTION cipher_dir, IMB_CHAIN_ORDER chain_order)
{
        DECLARE_ALIGNED(uint8_t auth_key[16], 16);
        DECLARE_ALIGNED(uint32_t expkey[4 * 15], 16);
        DECLARE_ALIGNED(uint32_t dust[4 * 15], 16);
        uint32_t skey1[4], skey2[4];
        DECLARE_ALIGNED(uint8_t digest[16], 16) = { 0 };
        struct IMB_JOB *job;
        uint8_t in_text[BUF_SIZE] = { 0 };
        DECLARE_ALIGNED(uint8_t all_zeros[BUF_SIZE], 16) = { 0 };
        int ret = -1;

        memset(auth_key, 0x55, sizeof(auth_key));

        IMB_AES_KEYEXP_128(mb_mgr, auth_key, expkey, dust);
        IMB_AES_CMAC_SUBKEY_GEN_128(mb_mgr, expkey, skey1, skey2);
        while (IMB_FLUSH_JOB(mb_mgr) != NULL)
                ;

        job = IMB_GET_NEXT_JOB(mb_mgr);
        memset(job, 0, sizeof(*job));
        job->cipher_direction = cipher_dir;
        job->chain_order = chain_order;
        job->src = in_text;
        job->cipher_mode = IMB_CIPHER_NULL;
        job->enc_keys = expkey;
        job->dec_keys = expkey;

        job->hash_alg = IMB_AUTH_AES_CMAC;
        job->u.CMAC._key_expanded = expkey;
        job->u.CMAC._skey1 = skey1;
        job->u.CMAC._skey2 = skey2;
        job->auth_tag_output = digest;
        job->auth_tag_output_len_in_bytes = 16;

        job = IMB_SUBMIT_JOB(mb_mgr);
        if (!job)
                job = IMB_FLUSH_JOB(mb_mgr);

        if (!job) {
                printf("%d Unexpected null return from submit/flush_job\n", __LINE__);
                goto end;
        }
        if (job->status != IMB_STATUS_COMPLETED) {
                printf("%d Error status:%d", __LINE__, job->status);
                goto end;
        }

        /* Check that input text has not been changed */
        if (memcmp(in_text, all_zeros, BUF_SIZE)) {
                printf("overwrite source\n");
                hexdump(stderr, "Source", in_text, BUF_SIZE);
                goto end;
        }
        /* Check that authentication tag has been modified */
        if (memcmp(digest, all_zeros, 16) == 0) {
                printf("auth tag still zeros\n");
                hexdump(stderr, "Auth tag", digest, 16);
                goto end;
        }

        ret = 0;
        while (IMB_FLUSH_JOB(mb_mgr) != NULL)
                ;
end:
        if (ret == 0)
                test_suite_update(ctx, 1, 0);
        else
                test_suite_update(ctx, 0, 1);
}

int
null_test(struct IMB_MGR *mb_mgr)
{
        int errors = 0;
        struct test_suite_context ctx;

        /* NULL-HASH test */
        test_suite_start(&ctx, "NULL-HASH");
        test_null_hash(mb_mgr, &ctx, IMB_DIR_ENCRYPT, IMB_ORDER_CIPHER_HASH);
        test_null_hash(mb_mgr, &ctx, IMB_DIR_ENCRYPT, IMB_ORDER_HASH_CIPHER);
        test_null_hash(mb_mgr, &ctx, IMB_DIR_DECRYPT, IMB_ORDER_CIPHER_HASH);
        test_null_hash(mb_mgr, &ctx, IMB_DIR_DECRYPT, IMB_ORDER_HASH_CIPHER);
        errors += test_suite_end(&ctx);

        /* NULL-CIPHER test */
        test_suite_start(&ctx, "NULL-CIPHER");
        test_null_cipher(mb_mgr, &ctx, IMB_DIR_ENCRYPT, IMB_ORDER_CIPHER_HASH);
        test_null_cipher(mb_mgr, &ctx, IMB_DIR_ENCRYPT, IMB_ORDER_HASH_CIPHER);
        test_null_cipher(mb_mgr, &ctx, IMB_DIR_DECRYPT, IMB_ORDER_CIPHER_HASH);
        test_null_cipher(mb_mgr, &ctx, IMB_DIR_DECRYPT, IMB_ORDER_HASH_CIPHER);
        errors += test_suite_end(&ctx);

        return errors;
}
