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#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

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

int
hmac_md5_test(struct IMB_MGR *mb_mgr);

extern const struct mac_test hmac_md5_test_json[];

static int
hmac_md5_job_ok(const struct mac_test *vec, const struct IMB_JOB *job, const uint8_t *auth,
                const uint8_t *padding, const size_t sizeof_padding)
{
        if (job->status != IMB_STATUS_COMPLETED) {
                printf("line:%d job error status:%d ", __LINE__, job->status);
                return 0;
        }

        /* hash checks */
        if (memcmp(padding, &auth[sizeof_padding + (vec->tagSize / 8)], sizeof_padding)) {
                printf("hash overwrite tail\n");
                hexdump(stderr, "Target", &auth[sizeof_padding + (vec->tagSize / 8)],
                        sizeof_padding);
                return 0;
        }

        if (memcmp(padding, &auth[0], sizeof_padding)) {
                printf("hash overwrite head\n");
                hexdump(stderr, "Target", &auth[0], sizeof_padding);
                return 0;
        }

        if (memcmp(vec->tag, &auth[sizeof_padding], vec->tagSize / 8)) {
                printf("hash mismatched\n");
                hexdump(stderr, "Received", &auth[sizeof_padding], vec->tagSize / 8);
                hexdump(stderr, "Expected", vec->tag, vec->tagSize / 8);
                return 0;
        }
        return 1;
}

static int
test_hmac_md5(struct IMB_MGR *mb_mgr, const struct mac_test *vec, const int num_jobs)
{
        struct IMB_JOB *job;
        uint8_t padding[16];
        uint8_t **auths = malloc(num_jobs * sizeof(void *));
        int i = 0, jobs_rx = 0, ret = -1;
        DECLARE_ALIGNED(uint8_t ipad_hash[IMB_MD5_DIGEST_SIZE_IN_BYTES], 16);
        DECLARE_ALIGNED(uint8_t opad_hash[IMB_MD5_DIGEST_SIZE_IN_BYTES], 16);

        if (auths == NULL) {
                fprintf(stderr, "Can't allocate buffer memory\n");
                goto end2;
        }

        memset(padding, -1, sizeof(padding));
        memset(auths, 0, num_jobs * sizeof(void *));

        for (i = 0; i < num_jobs; i++) {
                const size_t alloc_len = (vec->tagSize / 8) + (sizeof(padding) * 2);

                auths[i] = malloc(alloc_len);
                if (auths[i] == NULL) {
                        fprintf(stderr, "Can't allocate buffer memory\n");
                        goto end;
                }
                memset(auths[i], -1, alloc_len);
        }

        imb_hmac_ipad_opad(mb_mgr, IMB_AUTH_MD5, vec->key, vec->keySize / 8, ipad_hash, opad_hash);

        /* empty the manager */
        while (IMB_FLUSH_JOB(mb_mgr) != NULL)
                ;

        for (i = 0; i < num_jobs; i++) {
                job = IMB_GET_NEXT_JOB(mb_mgr);
                job->enc_keys = NULL;
                job->dec_keys = NULL;
                job->cipher_direction = IMB_DIR_ENCRYPT;
                job->chain_order = IMB_ORDER_HASH_CIPHER;
                job->dst = NULL;
                job->key_len_in_bytes = 0;
                job->auth_tag_output = auths[i] + sizeof(padding);
                job->auth_tag_output_len_in_bytes = vec->tagSize / 8;
                job->iv = NULL;
                job->iv_len_in_bytes = 0;
                job->src = (const void *) vec->msg;
                job->cipher_start_src_offset_in_bytes = 0;
                job->msg_len_to_cipher_in_bytes = 0;
                job->hash_start_src_offset_in_bytes = 0;
                job->msg_len_to_hash_in_bytes = vec->msgSize / 8;
                job->u.HMAC._hashed_auth_key_xor_ipad = ipad_hash;
                job->u.HMAC._hashed_auth_key_xor_opad = opad_hash;
                job->cipher_mode = IMB_CIPHER_NULL;
                job->hash_alg = IMB_AUTH_MD5;

                job->user_data = auths[i];

                job = IMB_SUBMIT_JOB(mb_mgr);
                if (job) {
                        jobs_rx++;
                        /*
                         * HMAC-MD5 requires 8 submissions to get one back
                         */
                        if (num_jobs < 8) {
                                printf("%d Unexpected return from submit_job\n", __LINE__);
                                goto end;
                        }
                        if (!hmac_md5_job_ok(vec, job, job->user_data, padding, sizeof(padding)))
                                goto end;
                }
        }

        while ((job = IMB_FLUSH_JOB(mb_mgr)) != NULL) {
                jobs_rx++;
                if (!hmac_md5_job_ok(vec, job, job->user_data, padding, sizeof(padding)))
                        goto end;
        }

        if (jobs_rx != num_jobs) {
                printf("Expected %d jobs, received %d\n", num_jobs, jobs_rx);
                goto end;
        }
        ret = 0;

end:
        /* empty the manager before next tests */
        while (IMB_FLUSH_JOB(mb_mgr) != NULL)
                ;

        for (i = 0; i < num_jobs; i++) {
                if (auths[i] != NULL)
                        free(auths[i]);
        }

end2:
        if (auths != NULL)
                free(auths);

        return ret;
}

static void
test_hmac_md5_std_vectors(struct IMB_MGR *mb_mgr, const int num_jobs, struct test_suite_context *ts)
{

        const struct mac_test *v = hmac_md5_test_json;

        if (!quiet_mode)
                printf("HMAC-MD5 standard test vectors (N jobs = %d):\n", num_jobs);
        for (; v->msg != NULL; v++) {
                if (!quiet_mode) {
#ifdef DEBUG
                        printf("RFC2202 Test Case %zu key_len:%zu "
                               "data_len:%zu digest_len:%zu\n",
                               v->tcId, v->keySize / 8, v->msgSize / 8, v->tagSize / 8);
#else
                        printf(".");
#endif
                }
                /* No functionality for keys larger than block size */
                if ((v->keySize / 8) > IMB_MD5_BLOCK_SIZE) {
#ifdef DEBUG
                        if (!quiet_mode)
                                printf("Skipped vector %zu, "
                                       "Key size larger than block size\n",
                                       v->tcId);
#endif
                        continue;
                }
                if (test_hmac_md5(mb_mgr, v, num_jobs)) {
                        printf("error #%zu\n", v->tcId);
                        test_suite_update(ts, 0, 1);
                } else {
                        test_suite_update(ts, 1, 0);
                }
        }
        if (!quiet_mode)
                printf("\n");
}

int
hmac_md5_test(struct IMB_MGR *mb_mgr)
{
        struct test_suite_context ts;
        int num_jobs, errors = 0;

        test_suite_start(&ts, "HMAC-MD5");
        for (num_jobs = 1; num_jobs <= 17; num_jobs++)
                test_hmac_md5_std_vectors(mb_mgr, num_jobs, &ts);
        errors = test_suite_end(&ts);

        return errors;
}
