/*************************************************************************
* Copyright (C) 2022 Intel Corporation
*
* Licensed under the Apache License,  Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* 	http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law  or agreed  to  in  writing,  software
* distributed under  the License  is  distributed  on  an  "AS IS"  BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the  specific  language  governing  permissions  and
* limitations under the License.
*************************************************************************/

#include <internal/common/ifma_defs.h>
#include <internal/sm4/sm4_ccm_mb.h>

DLL_PUBLIC
mbx_status16
mbx_sm4_ccm_encrypt_mb16(int8u *pa_out[SM4_LINES], const int8u *const pa_in[SM4_LINES], const int in_len[SM4_LINES], SM4_CCM_CTX_mb16 *p_context)
{
    int buf_no;
    mbx_status16 status = 0;
    __mmask16 mb_mask   = 0xFFFF;
    int64u *processed_len = SM4_CCM_CONTEXT_PROCESSED_LEN(p_context);
    int64u *msg_len = SM4_CCM_CONTEXT_MSG_LEN(p_context);

    /* Test input pointers */
    if (NULL == pa_out || NULL == pa_in || NULL == in_len || NULL == p_context) {
        status = MBX_SET_STS16_ALL(MBX_STATUS_NULL_PARAM_ERR);
        return status;
    }

   /* Check state */
   if (sm4_ccm_update_aad != SM4_CCM_CONTEXT_STATE(p_context) &&
       sm4_ccm_start_encdec != SM4_CCM_CONTEXT_STATE(p_context) &&
       sm4_ccm_enc != SM4_CCM_CONTEXT_STATE(p_context)) {

      status = MBX_SET_STS16_ALL(MBX_STATUS_MISMATCH_PARAM_ERR);
      return status;
   }

    /* Don't process buffers with NULL pointers or invalid lengths */
    for (buf_no = 0; buf_no < SM4_LINES; buf_no++) {
        if (pa_out[buf_no] == NULL || pa_in[buf_no] == NULL) {
            status = MBX_SET_STS16(status, buf_no, MBX_STATUS_NULL_PARAM_ERR);
            mb_mask &= ~(0x1 << buf_no);
            continue;
        }

        if (in_len[buf_no] < 0) {
            status = MBX_SET_STS16(status, buf_no, MBX_STATUS_MISMATCH_PARAM_ERR);
            mb_mask &= ~(0x1 << buf_no);
            continue;
        }

        processed_len[buf_no] += in_len[buf_no];
        /* Check if total processed length will exceed the total message length passed at init */
        if (processed_len[buf_no] > msg_len[buf_no]) {
            status = MBX_SET_STS16(status, buf_no, MBX_STATUS_MISMATCH_PARAM_ERR);
            mb_mask &= ~(0x1 << buf_no);
        }
    }

    if (MBX_IS_ANY_OK_STS16(status))
        sm4_ccm_encrypt_mb16(pa_out, pa_in, in_len, mb_mask, p_context);

    return status;
}
