aes_ccm.h 1.0 KB

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  1. /* SPDX-License-Identifier: GPL-2.0-only */
  2. /*
  3. * Copyright 2003-2004, Instant802 Networks, Inc.
  4. * Copyright 2006, Devicescape Software, Inc.
  5. */
  6. #ifndef AES_CCM_H
  7. #define AES_CCM_H
  8. #include "aead_api.h"
  9. #define CCM_AAD_LEN 32
  10. static inline struct crypto_aead *
  11. ieee80211_aes_key_setup_encrypt(const u8 key[], size_t key_len, size_t mic_len)
  12. {
  13. return aead_key_setup_encrypt("ccm(aes)", key, key_len, mic_len);
  14. }
  15. static inline int
  16. ieee80211_aes_ccm_encrypt(struct crypto_aead *tfm,
  17. u8 *b_0, u8 *aad, u8 *data,
  18. size_t data_len, u8 *mic)
  19. {
  20. return aead_encrypt(tfm, b_0, aad + 2,
  21. be16_to_cpup((__be16 *)aad),
  22. data, data_len, mic);
  23. }
  24. static inline int
  25. ieee80211_aes_ccm_decrypt(struct crypto_aead *tfm,
  26. u8 *b_0, u8 *aad, u8 *data,
  27. size_t data_len, u8 *mic)
  28. {
  29. return aead_decrypt(tfm, b_0, aad + 2,
  30. be16_to_cpup((__be16 *)aad),
  31. data, data_len, mic);
  32. }
  33. static inline void ieee80211_aes_key_free(struct crypto_aead *tfm)
  34. {
  35. return aead_key_free(tfm);
  36. }
  37. #endif /* AES_CCM_H */