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       1                 :             : /**
       2                 :             :  *  Copyright Notice:
       3                 :             :  *  Copyright 2025-2026 DMTF. All rights reserved.
       4                 :             :  *  License: BSD 3-Clause License. For full text see link: https://github.com/DMTF/libspdm/blob/main/LICENSE.md
       5                 :             :  **/
       6                 :             : 
       7                 :             : #include "internal/libspdm_secured_message_lib.h"
       8                 :             : 
       9                 :           0 : void *libspdm_secured_message_kem_new(spdm_version_number_t spdm_version,
      10                 :             :                                       uint32_t kem_alg, bool is_initiator)
      11                 :             : {
      12                 :           0 :     return libspdm_kem_new(spdm_version, kem_alg, is_initiator);
      13                 :             : }
      14                 :             : 
      15                 :           0 : void libspdm_secured_message_kem_free(uint32_t kem_alg, void *kem_context)
      16                 :             : {
      17                 :           0 :     libspdm_kem_free(kem_alg, kem_context);
      18                 :           0 : }
      19                 :             : 
      20                 :           0 : bool libspdm_secured_message_kem_generate_key(uint32_t kem_alg,
      21                 :             :                                               void *kem_context,
      22                 :             :                                               uint8_t *encap_key,
      23                 :             :                                               size_t *encap_key_size)
      24                 :             : {
      25                 :           0 :     return libspdm_kem_generate_key(kem_alg, kem_context, encap_key, encap_key_size);
      26                 :             : }
      27                 :             : 
      28                 :           0 : bool libspdm_secured_message_kem_encapsulate(
      29                 :             :     uint32_t kem_alg, void *kem_context,
      30                 :             :     const uint8_t *peer_encap_key, size_t peer_encap_key_size,
      31                 :             :     uint8_t *cipher_text, size_t *cipher_text_size,
      32                 :             :     void *spdm_secured_message_context)
      33                 :             : {
      34                 :             :     libspdm_secured_message_context_t *secured_message_context;
      35                 :             :     uint8_t final_key[LIBSPDM_MAX_KEM_SS_SIZE];
      36                 :             :     size_t final_key_size;
      37                 :             :     bool ret;
      38                 :             : 
      39                 :           0 :     secured_message_context = spdm_secured_message_context;
      40                 :             : 
      41                 :           0 :     final_key_size = sizeof(final_key);
      42                 :           0 :     ret = libspdm_kem_encapsulate(kem_alg, kem_context, peer_encap_key,
      43                 :             :                                   peer_encap_key_size, cipher_text,
      44                 :             :                                   cipher_text_size, final_key,
      45                 :             :                                   &final_key_size);
      46         [ #  # ]:           0 :     if (!ret) {
      47                 :           0 :         return ret;
      48                 :             :     }
      49                 :           0 :     libspdm_copy_mem(secured_message_context->master_secret.shared_secret,
      50                 :             :                      sizeof(secured_message_context->master_secret.shared_secret),
      51                 :             :                      final_key, final_key_size);
      52                 :           0 :     libspdm_zero_mem(final_key, final_key_size);
      53                 :           0 :     secured_message_context->shared_key_size = final_key_size;
      54                 :           0 :     return true;
      55                 :             : }
      56                 :             : 
      57                 :           0 : bool libspdm_secured_message_kem_decapsulate(
      58                 :             :     uint32_t kem_alg, void *kem_context,
      59                 :             :     const uint8_t *peer_cipher_text, size_t peer_cipher_text_size,
      60                 :             :     void *spdm_secured_message_context)
      61                 :             : {
      62                 :             :     libspdm_secured_message_context_t *secured_message_context;
      63                 :             :     uint8_t final_key[LIBSPDM_MAX_KEM_SS_SIZE];
      64                 :             :     size_t final_key_size;
      65                 :             :     bool ret;
      66                 :             : 
      67                 :           0 :     secured_message_context = spdm_secured_message_context;
      68                 :             : 
      69                 :           0 :     final_key_size = sizeof(final_key);
      70                 :           0 :     ret = libspdm_kem_decapsulate(kem_alg, kem_context, peer_cipher_text,
      71                 :             :                                   peer_cipher_text_size, final_key,
      72                 :             :                                   &final_key_size);
      73         [ #  # ]:           0 :     if (!ret) {
      74                 :           0 :         return ret;
      75                 :             :     }
      76                 :           0 :     libspdm_copy_mem(secured_message_context->master_secret.shared_secret,
      77                 :             :                      sizeof(secured_message_context->master_secret.shared_secret),
      78                 :             :                      final_key, final_key_size);
      79                 :           0 :     libspdm_zero_mem(final_key, final_key_size);
      80                 :           0 :     secured_message_context->shared_key_size = final_key_size;
      81                 :           0 :     return true;
      82                 :             : }